MPEG4Writer.cpp revision bc03dbeb6c3c0c829aa25b57dc28322996a8d630 
1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17//#define LOG_NDEBUG 0
18#define LOG_TAG "MPEG4Writer"
19
20#include <algorithm>
21
22#include <arpa/inet.h>
23#include <fcntl.h>
24#include <inttypes.h>
25#include <pthread.h>
26#include <sys/prctl.h>
27#include <sys/stat.h>
28#include <sys/types.h>
29#include <unistd.h>
30
31#include <utils/Log.h>
32
33#include <functional>
34
35#include <media/stagefright/foundation/ADebug.h>
36#include <media/stagefright/foundation/AMessage.h>
37#include <media/stagefright/foundation/AUtils.h>
38#include <media/stagefright/foundation/ColorUtils.h>
39#include <media/stagefright/MPEG4Writer.h>
40#include <media/stagefright/MediaBuffer.h>
41#include <media/stagefright/MetaData.h>
42#include <media/stagefright/MediaDefs.h>
43#include <media/stagefright/MediaErrors.h>
44#include <media/stagefright/MediaSource.h>
45#include <media/stagefright/Utils.h>
46#include <media/mediarecorder.h>
47#include <cutils/properties.h>
48
49#include "include/ESDS.h"
50#include "include/HevcUtils.h"
51#include "include/avc_utils.h"
52
53#ifndef __predict_false
54#define __predict_false(exp) __builtin_expect((exp) != 0, 0)
55#endif
56
57#define WARN_UNLESS(condition, message, ...) \
58( (__predict_false(condition)) ? false : ({ \
59    ALOGW("Condition %s failed "  message, #condition, ##__VA_ARGS__); \
60    true; \
61}))
62
63namespace android {
64
65static const int64_t kMinStreamableFileSizeInBytes = 5 * 1024 * 1024;
66static const int64_t kMax32BitFileSize = 0x00ffffffffLL; // 2^32-1 : max FAT32
67                                                         // filesystem file size
68                                                         // used by most SD cards
69static const uint8_t kNalUnitTypeSeqParamSet = 0x07;
70static const uint8_t kNalUnitTypePicParamSet = 0x08;
71static const int64_t kInitialDelayTimeUs     = 700000LL;
72static const int64_t kMaxMetadataSize = 0x4000000LL;   // 64MB max per-frame metadata size
73
74static const char kMetaKey_Version[]    = "com.android.version";
75#ifdef SHOW_MODEL_BUILD
76static const char kMetaKey_Model[]      = "com.android.model";
77static const char kMetaKey_Build[]      = "com.android.build";
78#endif
79static const char kMetaKey_CaptureFps[] = "com.android.capture.fps";
80static const char kMetaKey_TemporalLayerCount[] = "com.android.video.temporal_layers_count";
81
82static const int kTimestampDebugCount = 10;
83
84static const uint8_t kMandatoryHevcNalUnitTypes[3] = {
85    kHevcNalUnitTypeVps,
86    kHevcNalUnitTypeSps,
87    kHevcNalUnitTypePps,
88};
89static const uint8_t kHevcNalUnitTypes[5] = {
90    kHevcNalUnitTypeVps,
91    kHevcNalUnitTypeSps,
92    kHevcNalUnitTypePps,
93    kHevcNalUnitTypePrefixSei,
94    kHevcNalUnitTypeSuffixSei,
95};
96/* uncomment to include model and build in meta */
97//#define SHOW_MODEL_BUILD 1
98
99class MPEG4Writer::Track {
100public:
101    Track(MPEG4Writer *owner, const sp<IMediaSource> &source, size_t trackId);
102
103    ~Track();
104
105    status_t start(MetaData *params);
106    status_t stop(bool stopSource = true);
107    status_t pause();
108    bool reachedEOS();
109
110    int64_t getDurationUs() const;
111    int64_t getEstimatedTrackSizeBytes() const;
112    void writeTrackHeader(bool use32BitOffset = true);
113    void bufferChunk(int64_t timestampUs);
114    bool isAvc() const { return mIsAvc; }
115    bool isHevc() const { return mIsHevc; }
116    bool isAudio() const { return mIsAudio; }
117    bool isMPEG4() const { return mIsMPEG4; }
118    void addChunkOffset(off64_t offset);
119    int32_t getTrackId() const { return mTrackId; }
120    status_t dump(int fd, const Vector<String16>& args) const;
121    static const char *getFourCCForMime(const char *mime);
122    const char *getTrackType() const;
123    void resetInternal();
124
125private:
126    enum {
127        kMaxCttsOffsetTimeUs = 1000000LL,  // 1 second
128        kSampleArraySize = 1000,
129    };
130
131    // A helper class to handle faster write box with table entries
132    template<class TYPE, unsigned ENTRY_SIZE>
133    // ENTRY_SIZE: # of values in each entry
134    struct ListTableEntries {
135        static_assert(ENTRY_SIZE > 0, "ENTRY_SIZE must be positive");
136        ListTableEntries(uint32_t elementCapacity)
137            : mElementCapacity(elementCapacity),
138            mTotalNumTableEntries(0),
139            mNumValuesInCurrEntry(0),
140            mCurrTableEntriesElement(NULL) {
141            CHECK_GT(mElementCapacity, 0);
142            // Ensure no integer overflow on allocation in add().
143            CHECK_LT(ENTRY_SIZE, UINT32_MAX / mElementCapacity);
144        }
145
146        // Free the allocated memory.
147        ~ListTableEntries() {
148            while (!mTableEntryList.empty()) {
149                typename List<TYPE *>::iterator it = mTableEntryList.begin();
150                delete[] (*it);
151                mTableEntryList.erase(it);
152            }
153        }
154
155        // Replace the value at the given position by the given value.
156        // There must be an existing value at the given position.
157        // @arg value must be in network byte order
158        // @arg pos location the value must be in.
159        void set(const TYPE& value, uint32_t pos) {
160            CHECK_LT(pos, mTotalNumTableEntries * ENTRY_SIZE);
161
162            typename List<TYPE *>::iterator it = mTableEntryList.begin();
163            uint32_t iterations = (pos / (mElementCapacity * ENTRY_SIZE));
164            while (it != mTableEntryList.end() && iterations > 0) {
165                ++it;
166                --iterations;
167            }
168            CHECK(it != mTableEntryList.end());
169            CHECK_EQ(iterations, 0);
170
171            (*it)[(pos % (mElementCapacity * ENTRY_SIZE))] = value;
172        }
173
174        // Get the value at the given position by the given value.
175        // @arg value the retrieved value at the position in network byte order.
176        // @arg pos location the value must be in.
177        // @return true if a value is found.
178        bool get(TYPE& value, uint32_t pos) const {
179            if (pos >= mTotalNumTableEntries * ENTRY_SIZE) {
180                return false;
181            }
182
183            typename List<TYPE *>::iterator it = mTableEntryList.begin();
184            uint32_t iterations = (pos / (mElementCapacity * ENTRY_SIZE));
185            while (it != mTableEntryList.end() && iterations > 0) {
186                ++it;
187                --iterations;
188            }
189            CHECK(it != mTableEntryList.end());
190            CHECK_EQ(iterations, 0);
191
192            value = (*it)[(pos % (mElementCapacity * ENTRY_SIZE))];
193            return true;
194        }
195
196        // adjusts all values by |adjust(value)|
197        void adjustEntries(
198                std::function<void(size_t /* ix */, TYPE(& /* entry */)[ENTRY_SIZE])> update) {
199            size_t nEntries = mTotalNumTableEntries + mNumValuesInCurrEntry / ENTRY_SIZE;
200            size_t ix = 0;
201            for (TYPE *entryArray : mTableEntryList) {
202                size_t num = std::min(nEntries, (size_t)mElementCapacity);
203                for (size_t i = 0; i < num; ++i) {
204                    update(ix++, (TYPE(&)[ENTRY_SIZE])(*entryArray));
205                    entryArray += ENTRY_SIZE;
206                }
207                nEntries -= num;
208            }
209        }
210
211        // Store a single value.
212        // @arg value must be in network byte order.
213        void add(const TYPE& value) {
214            CHECK_LT(mNumValuesInCurrEntry, mElementCapacity);
215            uint32_t nEntries = mTotalNumTableEntries % mElementCapacity;
216            uint32_t nValues  = mNumValuesInCurrEntry % ENTRY_SIZE;
217            if (nEntries == 0 && nValues == 0) {
218                mCurrTableEntriesElement = new TYPE[ENTRY_SIZE * mElementCapacity];
219                CHECK(mCurrTableEntriesElement != NULL);
220                mTableEntryList.push_back(mCurrTableEntriesElement);
221            }
222
223            uint32_t pos = nEntries * ENTRY_SIZE + nValues;
224            mCurrTableEntriesElement[pos] = value;
225
226            ++mNumValuesInCurrEntry;
227            if ((mNumValuesInCurrEntry % ENTRY_SIZE) == 0) {
228                ++mTotalNumTableEntries;
229                mNumValuesInCurrEntry = 0;
230            }
231        }
232
233        // Write out the table entries:
234        // 1. the number of entries goes first
235        // 2. followed by the values in the table enties in order
236        // @arg writer the writer to actual write to the storage
237        void write(MPEG4Writer *writer) const {
238            CHECK_EQ(mNumValuesInCurrEntry % ENTRY_SIZE, 0);
239            uint32_t nEntries = mTotalNumTableEntries;
240            writer->writeInt32(nEntries);
241            for (typename List<TYPE *>::iterator it = mTableEntryList.begin();
242                it != mTableEntryList.end(); ++it) {
243                CHECK_GT(nEntries, 0);
244                if (nEntries >= mElementCapacity) {
245                    writer->write(*it, sizeof(TYPE) * ENTRY_SIZE, mElementCapacity);
246                    nEntries -= mElementCapacity;
247                } else {
248                    writer->write(*it, sizeof(TYPE) * ENTRY_SIZE, nEntries);
249                    break;
250                }
251            }
252        }
253
254        // Return the number of entries in the table.
255        uint32_t count() const { return mTotalNumTableEntries; }
256
257    private:
258        uint32_t         mElementCapacity;  // # entries in an element
259        uint32_t         mTotalNumTableEntries;
260        uint32_t         mNumValuesInCurrEntry;  // up to ENTRY_SIZE
261        TYPE             *mCurrTableEntriesElement;
262        mutable List<TYPE *>     mTableEntryList;
263
264        DISALLOW_EVIL_CONSTRUCTORS(ListTableEntries);
265    };
266
267
268
269    MPEG4Writer *mOwner;
270    sp<MetaData> mMeta;
271    sp<IMediaSource> mSource;
272    volatile bool mDone;
273    volatile bool mPaused;
274    volatile bool mResumed;
275    volatile bool mStarted;
276    bool mIsAvc;
277    bool mIsHevc;
278    bool mIsAudio;
279    bool mIsVideo;
280    bool mIsMPEG4;
281    bool mGotStartKeyFrame;
282    bool mIsMalformed;
283    int32_t mTrackId;
284    int64_t mTrackDurationUs;
285    int64_t mMaxChunkDurationUs;
286    int64_t mLastDecodingTimeUs;
287
288    int64_t mEstimatedTrackSizeBytes;
289    int64_t mMdatSizeBytes;
290    int32_t mTimeScale;
291
292    pthread_t mThread;
293
294
295    List<MediaBuffer *> mChunkSamples;
296
297    bool                mSamplesHaveSameSize;
298    ListTableEntries<uint32_t, 1> *mStszTableEntries;
299
300    ListTableEntries<uint32_t, 1> *mStcoTableEntries;
301    ListTableEntries<off64_t, 1> *mCo64TableEntries;
302    ListTableEntries<uint32_t, 3> *mStscTableEntries;
303    ListTableEntries<uint32_t, 1> *mStssTableEntries;
304    ListTableEntries<uint32_t, 2> *mSttsTableEntries;
305    ListTableEntries<uint32_t, 2> *mCttsTableEntries;
306
307    int64_t mMinCttsOffsetTimeUs;
308    int64_t mMaxCttsOffsetTimeUs;
309
310    // Save the last 10 frames' timestamp for debug.
311    std::list<std::pair<int64_t, int64_t>> mTimestampDebugHelper;
312
313    // Sequence parameter set or picture parameter set
314    struct AVCParamSet {
315        AVCParamSet(uint16_t length, const uint8_t *data)
316            : mLength(length), mData(data) {}
317
318        uint16_t mLength;
319        const uint8_t *mData;
320    };
321    List<AVCParamSet> mSeqParamSets;
322    List<AVCParamSet> mPicParamSets;
323    uint8_t mProfileIdc;
324    uint8_t mProfileCompatible;
325    uint8_t mLevelIdc;
326
327    void *mCodecSpecificData;
328    size_t mCodecSpecificDataSize;
329    bool mGotAllCodecSpecificData;
330    bool mTrackingProgressStatus;
331
332    bool mReachedEOS;
333    int64_t mStartTimestampUs;
334    int64_t mStartTimeRealUs;
335    int64_t mFirstSampleTimeRealUs;
336    int64_t mPreviousTrackTimeUs;
337    int64_t mTrackEveryTimeDurationUs;
338
339    // Update the audio track's drift information.
340    void updateDriftTime(const sp<MetaData>& meta);
341
342    void dumpTimeStamps();
343
344    int32_t getStartTimeOffsetScaledTime() const;
345
346    static void *ThreadWrapper(void *me);
347    status_t threadEntry();
348
349    const uint8_t *parseParamSet(
350        const uint8_t *data, size_t length, int type, size_t *paramSetLen);
351
352    status_t copyCodecSpecificData(const uint8_t *data, size_t size, size_t minLength = 0);
353
354    status_t makeAVCCodecSpecificData(const uint8_t *data, size_t size);
355    status_t copyAVCCodecSpecificData(const uint8_t *data, size_t size);
356    status_t parseAVCCodecSpecificData(const uint8_t *data, size_t size);
357
358    status_t makeHEVCCodecSpecificData(const uint8_t *data, size_t size);
359    status_t copyHEVCCodecSpecificData(const uint8_t *data, size_t size);
360    status_t parseHEVCCodecSpecificData(
361            const uint8_t *data, size_t size, HevcParameterSets &paramSets);
362
363    // Track authoring progress status
364    void trackProgressStatus(int64_t timeUs, status_t err = OK);
365    void initTrackingProgressStatus(MetaData *params);
366
367    void getCodecSpecificDataFromInputFormatIfPossible();
368
369    // Determine the track time scale
370    // If it is an audio track, try to use the sampling rate as
371    // the time scale; however, if user chooses the overwrite
372    // value, the user-supplied time scale will be used.
373    void setTimeScale();
374
375    // Simple validation on the codec specific data
376    status_t checkCodecSpecificData() const;
377    int32_t mRotation;
378
379    void updateTrackSizeEstimate();
380    void addOneStscTableEntry(size_t chunkId, size_t sampleId);
381    void addOneStssTableEntry(size_t sampleId);
382
383    // Duration is time scale based
384    void addOneSttsTableEntry(size_t sampleCount, int32_t timescaledDur);
385    void addOneCttsTableEntry(size_t sampleCount, int32_t timescaledDur);
386
387    bool isTrackMalFormed() const;
388    void sendTrackSummary(bool hasMultipleTracks);
389
390    // Write the boxes
391    void writeStcoBox(bool use32BitOffset);
392    void writeStscBox();
393    void writeStszBox();
394    void writeStssBox();
395    void writeSttsBox();
396    void writeCttsBox();
397    void writeD263Box();
398    void writePaspBox();
399    void writeAvccBox();
400    void writeHvccBox();
401    void writeUrlBox();
402    void writeDrefBox();
403    void writeDinfBox();
404    void writeDamrBox();
405    void writeMdhdBox(uint32_t now);
406    void writeSmhdBox();
407    void writeVmhdBox();
408    void writeNmhdBox();
409    void writeHdlrBox();
410    void writeTkhdBox(uint32_t now);
411    void writeColrBox();
412    void writeMp4aEsdsBox();
413    void writeMp4vEsdsBox();
414    void writeAudioFourCCBox();
415    void writeVideoFourCCBox();
416    void writeMetadataFourCCBox();
417    void writeStblBox(bool use32BitOffset);
418
419    Track(const Track &);
420    Track &operator=(const Track &);
421};
422
423MPEG4Writer::MPEG4Writer(int fd) {
424    initInternal(fd);
425}
426
427MPEG4Writer::~MPEG4Writer() {
428    reset();
429
430    while (!mTracks.empty()) {
431        List<Track *>::iterator it = mTracks.begin();
432        delete *it;
433        (*it) = NULL;
434        mTracks.erase(it);
435    }
436    mTracks.clear();
437
438    if (mNextFd != -1) {
439        close(mNextFd);
440    }
441}
442
443void MPEG4Writer::initInternal(int fd) {
444    ALOGV("initInternal");
445    mFd = dup(fd);
446    mNextFd = -1;
447    mInitCheck = mFd < 0? NO_INIT: OK;
448    mIsRealTimeRecording = true;
449    mUse4ByteNalLength = true;
450    mUse32BitOffset = true;
451    mIsFileSizeLimitExplicitlyRequested = false;
452    mPaused = false;
453    mStarted = false;
454    mWriterThreadStarted = false;
455    mSendNotify = false;
456    mOffset = 0;
457    mMdatOffset = 0;
458    mMoovBoxBuffer = NULL;
459    mMoovBoxBufferOffset = 0;
460    mWriteMoovBoxToMemory = false;
461    mFreeBoxOffset = 0;
462    mStreamableFile = false;
463    mEstimatedMoovBoxSize = 0;
464    mMoovExtraSize = 0;
465    mInterleaveDurationUs = 1000000;
466    mTimeScale = -1;
467    mStartTimestampUs = -1ll;
468    mLatitudex10000 = 0;
469    mLongitudex10000 = 0;
470    mAreGeoTagsAvailable = false;
471    mStartTimeOffsetMs = -1;
472    mSwitchPending = false;
473    mMetaKeys = new AMessage();
474    addDeviceMeta();
475    // Verify mFd is seekable
476    off64_t off = lseek64(mFd, 0, SEEK_SET);
477    if (off < 0) {
478        ALOGE("cannot seek mFd: %s (%d) %lld", strerror(errno), errno, (long long)mFd);
479        release();
480    }
481    for (List<Track *>::iterator it = mTracks.begin();
482         it != mTracks.end(); ++it) {
483        (*it)->resetInternal();
484    }
485}
486
487status_t MPEG4Writer::dump(
488        int fd, const Vector<String16>& args) {
489    const size_t SIZE = 256;
490    char buffer[SIZE];
491    String8 result;
492    snprintf(buffer, SIZE, "   MPEG4Writer %p\n", this);
493    result.append(buffer);
494    snprintf(buffer, SIZE, "     mStarted: %s\n", mStarted? "true": "false");
495    result.append(buffer);
496    ::write(fd, result.string(), result.size());
497    for (List<Track *>::iterator it = mTracks.begin();
498         it != mTracks.end(); ++it) {
499        (*it)->dump(fd, args);
500    }
501    return OK;
502}
503
504status_t MPEG4Writer::Track::dump(
505        int fd, const Vector<String16>& /* args */) const {
506    const size_t SIZE = 256;
507    char buffer[SIZE];
508    String8 result;
509    snprintf(buffer, SIZE, "     %s track\n", getTrackType());
510    result.append(buffer);
511    snprintf(buffer, SIZE, "       reached EOS: %s\n",
512            mReachedEOS? "true": "false");
513    result.append(buffer);
514    snprintf(buffer, SIZE, "       frames encoded : %d\n", mStszTableEntries->count());
515    result.append(buffer);
516    snprintf(buffer, SIZE, "       duration encoded : %" PRId64 " us\n", mTrackDurationUs);
517    result.append(buffer);
518    ::write(fd, result.string(), result.size());
519    return OK;
520}
521
522// static
523const char *MPEG4Writer::Track::getFourCCForMime(const char *mime) {
524    if (mime == NULL) {
525        return NULL;
526    }
527    if (!strncasecmp(mime, "audio/", 6)) {
528        if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime)) {
529            return "samr";
530        } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) {
531            return "sawb";
532        } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) {
533            return "mp4a";
534        }
535    } else if (!strncasecmp(mime, "video/", 6)) {
536        if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) {
537            return "mp4v";
538        } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) {
539            return "s263";
540        } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) {
541            return "avc1";
542        } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_HEVC, mime)) {
543            return "hvc1";
544        }
545    } else if (!strncasecmp(mime, "application/", 12)) {
546        return "mett";
547    } else {
548        ALOGE("Track (%s) other than video/audio/metadata is not supported", mime);
549    }
550    return NULL;
551}
552
553status_t MPEG4Writer::addSource(const sp<IMediaSource> &source) {
554    Mutex::Autolock l(mLock);
555    if (mStarted) {
556        ALOGE("Attempt to add source AFTER recording is started");
557        return UNKNOWN_ERROR;
558    }
559
560    CHECK(source.get() != NULL);
561
562    const char *mime;
563    source->getFormat()->findCString(kKeyMIMEType, &mime);
564
565    if (Track::getFourCCForMime(mime) == NULL) {
566        ALOGE("Unsupported mime '%s'", mime);
567        return ERROR_UNSUPPORTED;
568    }
569
570    // This is a metadata track or the first track of either audio or video
571    // Go ahead to add the track.
572    Track *track = new Track(this, source, 1 + mTracks.size());
573    mTracks.push_back(track);
574
575    return OK;
576}
577
578status_t MPEG4Writer::startTracks(MetaData *params) {
579    if (mTracks.empty()) {
580        ALOGE("No source added");
581        return INVALID_OPERATION;
582    }
583
584    for (List<Track *>::iterator it = mTracks.begin();
585         it != mTracks.end(); ++it) {
586        status_t err = (*it)->start(params);
587
588        if (err != OK) {
589            for (List<Track *>::iterator it2 = mTracks.begin();
590                 it2 != it; ++it2) {
591                (*it2)->stop();
592            }
593
594            return err;
595        }
596    }
597    return OK;
598}
599
600void MPEG4Writer::addDeviceMeta() {
601    // add device info and estimate space in 'moov'
602    char val[PROPERTY_VALUE_MAX];
603    size_t n;
604    // meta size is estimated by adding up the following:
605    // - meta header structures, which occur only once (total 66 bytes)
606    // - size for each key, which consists of a fixed header (32 bytes),
607    //   plus key length and data length.
608    mMoovExtraSize += 66;
609    if (property_get("ro.build.version.release", val, NULL)
610            && (n = strlen(val)) > 0) {
611        mMetaKeys->setString(kMetaKey_Version, val, n + 1);
612        mMoovExtraSize += sizeof(kMetaKey_Version) + n + 32;
613    }
614#ifdef SHOW_MODEL_BUILD
615    if (property_get("ro.product.model", val, NULL)
616            && (n = strlen(val)) > 0) {
617        mMetaKeys->setString(kMetaKey_Model, val, n + 1);
618        mMoovExtraSize += sizeof(kMetaKey_Model) + n + 32;
619    }
620    if (property_get("ro.build.display.id", val, NULL)
621            && (n = strlen(val)) > 0) {
622        mMetaKeys->setString(kMetaKey_Build, val, n + 1);
623        mMoovExtraSize += sizeof(kMetaKey_Build) + n + 32;
624    }
625#endif
626}
627
628int64_t MPEG4Writer::estimateMoovBoxSize(int32_t bitRate) {
629    // This implementation is highly experimental/heurisitic.
630    //
631    // Statistical analysis shows that metadata usually accounts
632    // for a small portion of the total file size, usually < 0.6%.
633
634    // The default MIN_MOOV_BOX_SIZE is set to 0.6% x 1MB / 2,
635    // where 1MB is the common file size limit for MMS application.
636    // The default MAX _MOOV_BOX_SIZE value is based on about 3
637    // minute video recording with a bit rate about 3 Mbps, because
638    // statistics also show that most of the video captured are going
639    // to be less than 3 minutes.
640
641    // If the estimation is wrong, we will pay the price of wasting
642    // some reserved space. This should not happen so often statistically.
643    static const int32_t factor = mUse32BitOffset? 1: 2;
644    static const int64_t MIN_MOOV_BOX_SIZE = 3 * 1024;  // 3 KB
645    static const int64_t MAX_MOOV_BOX_SIZE = (180 * 3000000 * 6LL / 8000);
646    int64_t size = MIN_MOOV_BOX_SIZE;
647
648    // Max file size limit is set
649    if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) {
650        size = mMaxFileSizeLimitBytes * 6 / 1000;
651    }
652
653    // Max file duration limit is set
654    if (mMaxFileDurationLimitUs != 0) {
655        if (bitRate > 0) {
656            int64_t size2 =
657                ((mMaxFileDurationLimitUs / 1000) * bitRate * 6) / 8000000;
658            if (mMaxFileSizeLimitBytes != 0 && mIsFileSizeLimitExplicitlyRequested) {
659                // When both file size and duration limits are set,
660                // we use the smaller limit of the two.
661                if (size > size2) {
662                    size = size2;
663                }
664            } else {
665                // Only max file duration limit is set
666                size = size2;
667            }
668        }
669    }
670
671    if (size < MIN_MOOV_BOX_SIZE) {
672        size = MIN_MOOV_BOX_SIZE;
673    }
674
675    // Any long duration recording will be probably end up with
676    // non-streamable mp4 file.
677    if (size > MAX_MOOV_BOX_SIZE) {
678        size = MAX_MOOV_BOX_SIZE;
679    }
680
681    // Account for the extra stuff (Geo, meta keys, etc.)
682    size += mMoovExtraSize;
683
684    ALOGI("limits: %" PRId64 "/%" PRId64 " bytes/us, bit rate: %d bps and the"
685         " estimated moov size %" PRId64 " bytes",
686         mMaxFileSizeLimitBytes, mMaxFileDurationLimitUs, bitRate, size);
687    return factor * size;
688}
689
690status_t MPEG4Writer::start(MetaData *param) {
691    if (mInitCheck != OK) {
692        return UNKNOWN_ERROR;
693    }
694    mStartMeta = param;
695
696    /*
697     * Check mMaxFileSizeLimitBytes at the beginning
698     * since mMaxFileSizeLimitBytes may be implicitly
699     * changed later for 32-bit file offset even if
700     * user does not ask to set it explicitly.
701     */
702    if (mMaxFileSizeLimitBytes != 0) {
703        mIsFileSizeLimitExplicitlyRequested = true;
704    }
705
706    int32_t use64BitOffset;
707    if (param &&
708        param->findInt32(kKey64BitFileOffset, &use64BitOffset) &&
709        use64BitOffset) {
710        mUse32BitOffset = false;
711    }
712
713    if (mUse32BitOffset) {
714        // Implicit 32 bit file size limit
715        if (mMaxFileSizeLimitBytes == 0) {
716            mMaxFileSizeLimitBytes = kMax32BitFileSize;
717        }
718
719        // If file size is set to be larger than the 32 bit file
720        // size limit, treat it as an error.
721        if (mMaxFileSizeLimitBytes > kMax32BitFileSize) {
722            ALOGW("32-bit file size limit (%" PRId64 " bytes) too big. "
723                 "It is changed to %" PRId64 " bytes",
724                mMaxFileSizeLimitBytes, kMax32BitFileSize);
725            mMaxFileSizeLimitBytes = kMax32BitFileSize;
726        }
727    }
728
729    int32_t use2ByteNalLength;
730    if (param &&
731        param->findInt32(kKey2ByteNalLength, &use2ByteNalLength) &&
732        use2ByteNalLength) {
733        mUse4ByteNalLength = false;
734    }
735
736    int32_t isRealTimeRecording;
737    if (param && param->findInt32(kKeyRealTimeRecording, &isRealTimeRecording)) {
738        mIsRealTimeRecording = isRealTimeRecording;
739    }
740
741    mStartTimestampUs = -1;
742
743    if (mStarted) {
744        if (mPaused) {
745            mPaused = false;
746            return startTracks(param);
747        }
748        return OK;
749    }
750
751    if (!param ||
752        !param->findInt32(kKeyTimeScale, &mTimeScale)) {
753        mTimeScale = 1000;
754    }
755    CHECK_GT(mTimeScale, 0);
756    ALOGV("movie time scale: %d", mTimeScale);
757
758    /*
759     * When the requested file size limit is small, the priority
760     * is to meet the file size limit requirement, rather than
761     * to make the file streamable. mStreamableFile does not tell
762     * whether the actual recorded file is streamable or not.
763     */
764    mStreamableFile =
765        (mMaxFileSizeLimitBytes != 0 &&
766         mMaxFileSizeLimitBytes >= kMinStreamableFileSizeInBytes);
767
768    /*
769     * mWriteMoovBoxToMemory is true if the amount of data in moov box is
770     * smaller than the reserved free space at the beginning of a file, AND
771     * when the content of moov box is constructed. Note that video/audio
772     * frame data is always written to the file but not in the memory.
773     *
774     * Before stop()/reset() is called, mWriteMoovBoxToMemory is always
775     * false. When reset() is called at the end of a recording session,
776     * Moov box needs to be constructed.
777     *
778     * 1) Right before a moov box is constructed, mWriteMoovBoxToMemory
779     * to set to mStreamableFile so that if
780     * the file is intended to be streamable, it is set to true;
781     * otherwise, it is set to false. When the value is set to false,
782     * all the content of the moov box is written immediately to
783     * the end of the file. When the value is set to true, all the
784     * content of the moov box is written to an in-memory cache,
785     * mMoovBoxBuffer, util the following condition happens. Note
786     * that the size of the in-memory cache is the same as the
787     * reserved free space at the beginning of the file.
788     *
789     * 2) While the data of the moov box is written to an in-memory
790     * cache, the data size is checked against the reserved space.
791     * If the data size surpasses the reserved space, subsequent moov
792     * data could no longer be hold in the in-memory cache. This also
793     * indicates that the reserved space was too small. At this point,
794     * _all_ moov data must be written to the end of the file.
795     * mWriteMoovBoxToMemory must be set to false to direct the write
796     * to the file.
797     *
798     * 3) If the data size in moov box is smaller than the reserved
799     * space after moov box is completely constructed, the in-memory
800     * cache copy of the moov box is written to the reserved free
801     * space. Thus, immediately after the moov is completedly
802     * constructed, mWriteMoovBoxToMemory is always set to false.
803     */
804    mWriteMoovBoxToMemory = false;
805    mMoovBoxBuffer = NULL;
806    mMoovBoxBufferOffset = 0;
807
808    writeFtypBox(param);
809
810    mFreeBoxOffset = mOffset;
811
812    if (mEstimatedMoovBoxSize == 0) {
813        int32_t bitRate = -1;
814        if (param) {
815            param->findInt32(kKeyBitRate, &bitRate);
816        }
817        mEstimatedMoovBoxSize = estimateMoovBoxSize(bitRate);
818    }
819    CHECK_GE(mEstimatedMoovBoxSize, 8);
820    if (mStreamableFile) {
821        // Reserve a 'free' box only for streamable file
822        lseek64(mFd, mFreeBoxOffset, SEEK_SET);
823        writeInt32(mEstimatedMoovBoxSize);
824        write("free", 4);
825        mMdatOffset = mFreeBoxOffset + mEstimatedMoovBoxSize;
826    } else {
827        mMdatOffset = mOffset;
828    }
829
830    mOffset = mMdatOffset;
831    lseek64(mFd, mMdatOffset, SEEK_SET);
832    if (mUse32BitOffset) {
833        write("????mdat", 8);
834    } else {
835        write("\x00\x00\x00\x01mdat????????", 16);
836    }
837
838    status_t err = startWriterThread();
839    if (err != OK) {
840        return err;
841    }
842
843    err = startTracks(param);
844    if (err != OK) {
845        return err;
846    }
847
848    mStarted = true;
849    return OK;
850}
851
852bool MPEG4Writer::use32BitFileOffset() const {
853    return mUse32BitOffset;
854}
855
856status_t MPEG4Writer::pause() {
857    if (mInitCheck != OK) {
858        return OK;
859    }
860    mPaused = true;
861    status_t err = OK;
862    for (List<Track *>::iterator it = mTracks.begin();
863         it != mTracks.end(); ++it) {
864        status_t status = (*it)->pause();
865        if (status != OK) {
866            err = status;
867        }
868    }
869    return err;
870}
871
872void MPEG4Writer::stopWriterThread() {
873    ALOGD("Stopping writer thread");
874    if (!mWriterThreadStarted) {
875        return;
876    }
877
878    {
879        Mutex::Autolock autolock(mLock);
880
881        mDone = true;
882        mChunkReadyCondition.signal();
883    }
884
885    void *dummy;
886    pthread_join(mThread, &dummy);
887    mWriterThreadStarted = false;
888    ALOGD("Writer thread stopped");
889}
890
891/*
892 * MP4 file standard defines a composition matrix:
893 * | a  b  u |
894 * | c  d  v |
895 * | x  y  w |
896 *
897 * the element in the matrix is stored in the following
898 * order: {a, b, u, c, d, v, x, y, w},
899 * where a, b, c, d, x, and y is in 16.16 format, while
900 * u, v and w is in 2.30 format.
901 */
902void MPEG4Writer::writeCompositionMatrix(int degrees) {
903    ALOGV("writeCompositionMatrix");
904    uint32_t a = 0x00010000;
905    uint32_t b = 0;
906    uint32_t c = 0;
907    uint32_t d = 0x00010000;
908    switch (degrees) {
909        case 0:
910            break;
911        case 90:
912            a = 0;
913            b = 0x00010000;
914            c = 0xFFFF0000;
915            d = 0;
916            break;
917        case 180:
918            a = 0xFFFF0000;
919            d = 0xFFFF0000;
920            break;
921        case 270:
922            a = 0;
923            b = 0xFFFF0000;
924            c = 0x00010000;
925            d = 0;
926            break;
927        default:
928            CHECK(!"Should never reach this unknown rotation");
929            break;
930    }
931
932    writeInt32(a);           // a
933    writeInt32(b);           // b
934    writeInt32(0);           // u
935    writeInt32(c);           // c
936    writeInt32(d);           // d
937    writeInt32(0);           // v
938    writeInt32(0);           // x
939    writeInt32(0);           // y
940    writeInt32(0x40000000);  // w
941}
942
943void MPEG4Writer::release() {
944    close(mFd);
945    mFd = -1;
946    mInitCheck = NO_INIT;
947    mStarted = false;
948    free(mMoovBoxBuffer);
949    mMoovBoxBuffer = NULL;
950}
951
952void MPEG4Writer::finishCurrentSession() {
953    reset(false /* stopSource */);
954}
955
956status_t MPEG4Writer::switchFd() {
957    ALOGV("switchFd");
958    Mutex::Autolock l(mLock);
959    if (mSwitchPending) {
960        return OK;
961    }
962
963    if (mNextFd == -1) {
964        ALOGW("No FileDescripter for next recording");
965        return INVALID_OPERATION;
966    }
967
968    mSwitchPending = true;
969    sp<AMessage> msg = new AMessage(kWhatSwitch, mReflector);
970    status_t err = msg->post();
971
972    return err;
973}
974
975status_t MPEG4Writer::reset(bool stopSource) {
976    if (mInitCheck != OK) {
977        return OK;
978    } else {
979        if (!mWriterThreadStarted ||
980            !mStarted) {
981            if (mWriterThreadStarted) {
982                stopWriterThread();
983            }
984            release();
985            return OK;
986        }
987    }
988
989    status_t err = OK;
990    int64_t maxDurationUs = 0;
991    int64_t minDurationUs = 0x7fffffffffffffffLL;
992    for (List<Track *>::iterator it = mTracks.begin();
993         it != mTracks.end(); ++it) {
994        status_t status = (*it)->stop(stopSource);
995        if (err == OK && status != OK) {
996            err = status;
997        }
998
999        int64_t durationUs = (*it)->getDurationUs();
1000        if (durationUs > maxDurationUs) {
1001            maxDurationUs = durationUs;
1002        }
1003        if (durationUs < minDurationUs) {
1004            minDurationUs = durationUs;
1005        }
1006    }
1007
1008    if (mTracks.size() > 1) {
1009        ALOGD("Duration from tracks range is [%" PRId64 ", %" PRId64 "] us",
1010            minDurationUs, maxDurationUs);
1011    }
1012
1013    stopWriterThread();
1014
1015    // Do not write out movie header on error.
1016    if (err != OK) {
1017        release();
1018        return err;
1019    }
1020
1021    // Fix up the size of the 'mdat' chunk.
1022    if (mUse32BitOffset) {
1023        lseek64(mFd, mMdatOffset, SEEK_SET);
1024        uint32_t size = htonl(static_cast<uint32_t>(mOffset - mMdatOffset));
1025        ::write(mFd, &size, 4);
1026    } else {
1027        lseek64(mFd, mMdatOffset + 8, SEEK_SET);
1028        uint64_t size = mOffset - mMdatOffset;
1029        size = hton64(size);
1030        ::write(mFd, &size, 8);
1031    }
1032    lseek64(mFd, mOffset, SEEK_SET);
1033
1034    // Construct moov box now
1035    mMoovBoxBufferOffset = 0;
1036    mWriteMoovBoxToMemory = mStreamableFile;
1037    if (mWriteMoovBoxToMemory) {
1038        // There is no need to allocate in-memory cache
1039        // for moov box if the file is not streamable.
1040
1041        mMoovBoxBuffer = (uint8_t *) malloc(mEstimatedMoovBoxSize);
1042        CHECK(mMoovBoxBuffer != NULL);
1043    }
1044    writeMoovBox(maxDurationUs);
1045
1046    // mWriteMoovBoxToMemory could be set to false in
1047    // MPEG4Writer::write() method
1048    if (mWriteMoovBoxToMemory) {
1049        mWriteMoovBoxToMemory = false;
1050        // Content of the moov box is saved in the cache, and the in-memory
1051        // moov box needs to be written to the file in a single shot.
1052
1053        CHECK_LE(mMoovBoxBufferOffset + 8, mEstimatedMoovBoxSize);
1054
1055        // Moov box
1056        lseek64(mFd, mFreeBoxOffset, SEEK_SET);
1057        mOffset = mFreeBoxOffset;
1058        write(mMoovBoxBuffer, 1, mMoovBoxBufferOffset);
1059
1060        // Free box
1061        lseek64(mFd, mOffset, SEEK_SET);
1062        writeInt32(mEstimatedMoovBoxSize - mMoovBoxBufferOffset);
1063        write("free", 4);
1064    } else {
1065        ALOGI("The mp4 file will not be streamable.");
1066    }
1067
1068    // Free in-memory cache for moov box
1069    if (mMoovBoxBuffer != NULL) {
1070        free(mMoovBoxBuffer);
1071        mMoovBoxBuffer = NULL;
1072        mMoovBoxBufferOffset = 0;
1073    }
1074
1075    CHECK(mBoxes.empty());
1076
1077    release();
1078    return err;
1079}
1080
1081uint32_t MPEG4Writer::getMpeg4Time() {
1082    time_t now = time(NULL);
1083    // MP4 file uses time counting seconds since midnight, Jan. 1, 1904
1084    // while time function returns Unix epoch values which starts
1085    // at 1970-01-01. Lets add the number of seconds between them
1086    static const uint32_t delta = (66 * 365 + 17) * (24 * 60 * 60);
1087    if (now < 0 || uint32_t(now) > UINT32_MAX - delta) {
1088        return 0;
1089    }
1090    uint32_t mpeg4Time = uint32_t(now) + delta;
1091    return mpeg4Time;
1092}
1093
1094void MPEG4Writer::writeMvhdBox(int64_t durationUs) {
1095    uint32_t now = getMpeg4Time();
1096    beginBox("mvhd");
1097    writeInt32(0);             // version=0, flags=0
1098    writeInt32(now);           // creation time
1099    writeInt32(now);           // modification time
1100    writeInt32(mTimeScale);    // mvhd timescale
1101    int32_t duration = (durationUs * mTimeScale + 5E5) / 1E6;
1102    writeInt32(duration);
1103    writeInt32(0x10000);       // rate: 1.0
1104    writeInt16(0x100);         // volume
1105    writeInt16(0);             // reserved
1106    writeInt32(0);             // reserved
1107    writeInt32(0);             // reserved
1108    writeCompositionMatrix(0); // matrix
1109    writeInt32(0);             // predefined
1110    writeInt32(0);             // predefined
1111    writeInt32(0);             // predefined
1112    writeInt32(0);             // predefined
1113    writeInt32(0);             // predefined
1114    writeInt32(0);             // predefined
1115    writeInt32(mTracks.size() + 1);  // nextTrackID
1116    endBox();  // mvhd
1117}
1118
1119void MPEG4Writer::writeMoovBox(int64_t durationUs) {
1120    beginBox("moov");
1121    writeMvhdBox(durationUs);
1122    if (mAreGeoTagsAvailable) {
1123        writeUdtaBox();
1124    }
1125    writeMetaBox();
1126    int32_t id = 1;
1127    for (List<Track *>::iterator it = mTracks.begin();
1128        it != mTracks.end(); ++it, ++id) {
1129        (*it)->writeTrackHeader(mUse32BitOffset);
1130    }
1131    endBox();  // moov
1132}
1133
1134void MPEG4Writer::writeFtypBox(MetaData *param) {
1135    beginBox("ftyp");
1136
1137    int32_t fileType;
1138    if (param && param->findInt32(kKeyFileType, &fileType) &&
1139        fileType != OUTPUT_FORMAT_MPEG_4) {
1140        writeFourcc("3gp4");
1141        writeInt32(0);
1142        writeFourcc("isom");
1143        writeFourcc("3gp4");
1144    } else {
1145        writeFourcc("mp42");
1146        writeInt32(0);
1147        writeFourcc("isom");
1148        writeFourcc("mp42");
1149    }
1150
1151    endBox();
1152}
1153
1154static bool isTestModeEnabled() {
1155#if (PROPERTY_VALUE_MAX < 5)
1156#error "PROPERTY_VALUE_MAX must be at least 5"
1157#endif
1158
1159    // Test mode is enabled only if rw.media.record.test system
1160    // property is enabled.
1161    if (property_get_bool("rw.media.record.test", false)) {
1162        return true;
1163    }
1164    return false;
1165}
1166
1167void MPEG4Writer::sendSessionSummary() {
1168    // Send session summary only if test mode is enabled
1169    if (!isTestModeEnabled()) {
1170        return;
1171    }
1172
1173    for (List<ChunkInfo>::iterator it = mChunkInfos.begin();
1174         it != mChunkInfos.end(); ++it) {
1175        int trackNum = it->mTrack->getTrackId() << 28;
1176        notify(MEDIA_RECORDER_TRACK_EVENT_INFO,
1177                trackNum | MEDIA_RECORDER_TRACK_INTER_CHUNK_TIME_MS,
1178                it->mMaxInterChunkDurUs);
1179    }
1180}
1181
1182status_t MPEG4Writer::setInterleaveDuration(uint32_t durationUs) {
1183    mInterleaveDurationUs = durationUs;
1184    return OK;
1185}
1186
1187void MPEG4Writer::lock() {
1188    mLock.lock();
1189}
1190
1191void MPEG4Writer::unlock() {
1192    mLock.unlock();
1193}
1194
1195off64_t MPEG4Writer::addSample_l(MediaBuffer *buffer) {
1196    off64_t old_offset = mOffset;
1197
1198    ::write(mFd,
1199          (const uint8_t *)buffer->data() + buffer->range_offset(),
1200          buffer->range_length());
1201
1202    mOffset += buffer->range_length();
1203
1204    return old_offset;
1205}
1206
1207static void StripStartcode(MediaBuffer *buffer) {
1208    if (buffer->range_length() < 4) {
1209        return;
1210    }
1211
1212    const uint8_t *ptr =
1213        (const uint8_t *)buffer->data() + buffer->range_offset();
1214
1215    if (!memcmp(ptr, "\x00\x00\x00\x01", 4)) {
1216        buffer->set_range(
1217                buffer->range_offset() + 4, buffer->range_length() - 4);
1218    }
1219}
1220
1221off64_t MPEG4Writer::addMultipleLengthPrefixedSamples_l(MediaBuffer *buffer) {
1222    off64_t old_offset = mOffset;
1223
1224    const size_t kExtensionNALSearchRange = 64; // bytes to look for non-VCL NALUs
1225
1226    const uint8_t *dataStart = (const uint8_t *)buffer->data() + buffer->range_offset();
1227    const uint8_t *currentNalStart = dataStart;
1228    const uint8_t *nextNalStart;
1229    const uint8_t *data = dataStart;
1230    size_t nextNalSize;
1231    size_t searchSize = buffer->range_length() > kExtensionNALSearchRange ?
1232                   kExtensionNALSearchRange : buffer->range_length();
1233
1234    while (getNextNALUnit(&data, &searchSize, &nextNalStart,
1235            &nextNalSize, true) == OK) {
1236        size_t currentNalSize = nextNalStart - currentNalStart - 4 /* strip start-code */;
1237        MediaBuffer *nalBuf = new MediaBuffer((void *)currentNalStart, currentNalSize);
1238        addLengthPrefixedSample_l(nalBuf);
1239        nalBuf->release();
1240
1241        currentNalStart = nextNalStart;
1242    }
1243
1244    size_t currentNalOffset = currentNalStart - dataStart;
1245    buffer->set_range(buffer->range_offset() + currentNalOffset,
1246            buffer->range_length() - currentNalOffset);
1247    addLengthPrefixedSample_l(buffer);
1248
1249    return old_offset;
1250}
1251
1252off64_t MPEG4Writer::addLengthPrefixedSample_l(MediaBuffer *buffer) {
1253    off64_t old_offset = mOffset;
1254
1255    size_t length = buffer->range_length();
1256
1257    if (mUse4ByteNalLength) {
1258        uint8_t x = length >> 24;
1259        ::write(mFd, &x, 1);
1260        x = (length >> 16) & 0xff;
1261        ::write(mFd, &x, 1);
1262        x = (length >> 8) & 0xff;
1263        ::write(mFd, &x, 1);
1264        x = length & 0xff;
1265        ::write(mFd, &x, 1);
1266
1267        ::write(mFd,
1268              (const uint8_t *)buffer->data() + buffer->range_offset(),
1269              length);
1270
1271        mOffset += length + 4;
1272    } else {
1273        CHECK_LT(length, 65536);
1274
1275        uint8_t x = length >> 8;
1276        ::write(mFd, &x, 1);
1277        x = length & 0xff;
1278        ::write(mFd, &x, 1);
1279        ::write(mFd, (const uint8_t *)buffer->data() + buffer->range_offset(), length);
1280        mOffset += length + 2;
1281    }
1282
1283    return old_offset;
1284}
1285
1286size_t MPEG4Writer::write(
1287        const void *ptr, size_t size, size_t nmemb) {
1288
1289    const size_t bytes = size * nmemb;
1290    if (mWriteMoovBoxToMemory) {
1291
1292        off64_t moovBoxSize = 8 + mMoovBoxBufferOffset + bytes;
1293        if (moovBoxSize > mEstimatedMoovBoxSize) {
1294            // The reserved moov box at the beginning of the file
1295            // is not big enough. Moov box should be written to
1296            // the end of the file from now on, but not to the
1297            // in-memory cache.
1298
1299            // We write partial moov box that is in the memory to
1300            // the file first.
1301            for (List<off64_t>::iterator it = mBoxes.begin();
1302                 it != mBoxes.end(); ++it) {
1303                (*it) += mOffset;
1304            }
1305            lseek64(mFd, mOffset, SEEK_SET);
1306            ::write(mFd, mMoovBoxBuffer, mMoovBoxBufferOffset);
1307            ::write(mFd, ptr, bytes);
1308            mOffset += (bytes + mMoovBoxBufferOffset);
1309
1310            // All subsequent moov box content will be written
1311            // to the end of the file.
1312            mWriteMoovBoxToMemory = false;
1313        } else {
1314            memcpy(mMoovBoxBuffer + mMoovBoxBufferOffset, ptr, bytes);
1315            mMoovBoxBufferOffset += bytes;
1316        }
1317    } else {
1318        ::write(mFd, ptr, size * nmemb);
1319        mOffset += bytes;
1320    }
1321    return bytes;
1322}
1323
1324void MPEG4Writer::beginBox(uint32_t id) {
1325    mBoxes.push_back(mWriteMoovBoxToMemory?
1326            mMoovBoxBufferOffset: mOffset);
1327
1328    writeInt32(0);
1329    writeInt32(id);
1330}
1331
1332void MPEG4Writer::beginBox(const char *fourcc) {
1333    CHECK_EQ(strlen(fourcc), 4);
1334
1335    mBoxes.push_back(mWriteMoovBoxToMemory?
1336            mMoovBoxBufferOffset: mOffset);
1337
1338    writeInt32(0);
1339    writeFourcc(fourcc);
1340}
1341
1342void MPEG4Writer::endBox() {
1343    CHECK(!mBoxes.empty());
1344
1345    off64_t offset = *--mBoxes.end();
1346    mBoxes.erase(--mBoxes.end());
1347
1348    if (mWriteMoovBoxToMemory) {
1349       int32_t x = htonl(mMoovBoxBufferOffset - offset);
1350       memcpy(mMoovBoxBuffer + offset, &x, 4);
1351    } else {
1352        lseek64(mFd, offset, SEEK_SET);
1353        writeInt32(mOffset - offset);
1354        mOffset -= 4;
1355        lseek64(mFd, mOffset, SEEK_SET);
1356    }
1357}
1358
1359void MPEG4Writer::writeInt8(int8_t x) {
1360    write(&x, 1, 1);
1361}
1362
1363void MPEG4Writer::writeInt16(int16_t x) {
1364    x = htons(x);
1365    write(&x, 1, 2);
1366}
1367
1368void MPEG4Writer::writeInt32(int32_t x) {
1369    x = htonl(x);
1370    write(&x, 1, 4);
1371}
1372
1373void MPEG4Writer::writeInt64(int64_t x) {
1374    x = hton64(x);
1375    write(&x, 1, 8);
1376}
1377
1378void MPEG4Writer::writeCString(const char *s) {
1379    size_t n = strlen(s);
1380    write(s, 1, n + 1);
1381}
1382
1383void MPEG4Writer::writeFourcc(const char *s) {
1384    CHECK_EQ(strlen(s), 4);
1385    write(s, 1, 4);
1386}
1387
1388
1389// Written in +/-DD.DDDD format
1390void MPEG4Writer::writeLatitude(int degreex10000) {
1391    bool isNegative = (degreex10000 < 0);
1392    char sign = isNegative? '-': '+';
1393
1394    // Handle the whole part
1395    char str[9];
1396    int wholePart = degreex10000 / 10000;
1397    if (wholePart == 0) {
1398        snprintf(str, 5, "%c%.2d.", sign, wholePart);
1399    } else {
1400        snprintf(str, 5, "%+.2d.", wholePart);
1401    }
1402
1403    // Handle the fractional part
1404    int fractionalPart = degreex10000 - (wholePart * 10000);
1405    if (fractionalPart < 0) {
1406        fractionalPart = -fractionalPart;
1407    }
1408    snprintf(&str[4], 5, "%.4d", fractionalPart);
1409
1410    // Do not write the null terminator
1411    write(str, 1, 8);
1412}
1413
1414// Written in +/- DDD.DDDD format
1415void MPEG4Writer::writeLongitude(int degreex10000) {
1416    bool isNegative = (degreex10000 < 0);
1417    char sign = isNegative? '-': '+';
1418
1419    // Handle the whole part
1420    char str[10];
1421    int wholePart = degreex10000 / 10000;
1422    if (wholePart == 0) {
1423        snprintf(str, 6, "%c%.3d.", sign, wholePart);
1424    } else {
1425        snprintf(str, 6, "%+.3d.", wholePart);
1426    }
1427
1428    // Handle the fractional part
1429    int fractionalPart = degreex10000 - (wholePart * 10000);
1430    if (fractionalPart < 0) {
1431        fractionalPart = -fractionalPart;
1432    }
1433    snprintf(&str[5], 5, "%.4d", fractionalPart);
1434
1435    // Do not write the null terminator
1436    write(str, 1, 9);
1437}
1438
1439/*
1440 * Geodata is stored according to ISO-6709 standard.
1441 * latitudex10000 is latitude in degrees times 10000, and
1442 * longitudex10000 is longitude in degrees times 10000.
1443 * The range for the latitude is in [-90, +90], and
1444 * The range for the longitude is in [-180, +180]
1445 */
1446status_t MPEG4Writer::setGeoData(int latitudex10000, int longitudex10000) {
1447    // Is latitude or longitude out of range?
1448    if (latitudex10000 < -900000 || latitudex10000 > 900000 ||
1449        longitudex10000 < -1800000 || longitudex10000 > 1800000) {
1450        return BAD_VALUE;
1451    }
1452
1453    mLatitudex10000 = latitudex10000;
1454    mLongitudex10000 = longitudex10000;
1455    mAreGeoTagsAvailable = true;
1456    mMoovExtraSize += 30;
1457    return OK;
1458}
1459
1460status_t MPEG4Writer::setCaptureRate(float captureFps) {
1461    if (captureFps <= 0.0f) {
1462        return BAD_VALUE;
1463    }
1464
1465    mMetaKeys->setFloat(kMetaKey_CaptureFps, captureFps);
1466    mMoovExtraSize += sizeof(kMetaKey_CaptureFps) + 4 + 32;
1467
1468    return OK;
1469}
1470
1471status_t MPEG4Writer::setTemporalLayerCount(uint32_t layerCount) {
1472    if (layerCount > 9) {
1473        return BAD_VALUE;
1474    }
1475
1476    if (layerCount > 0) {
1477        mMetaKeys->setInt32(kMetaKey_TemporalLayerCount, layerCount);
1478        mMoovExtraSize += sizeof(kMetaKey_TemporalLayerCount) + 4 + 32;
1479    }
1480
1481    return OK;
1482}
1483
1484void MPEG4Writer::notifyApproachingLimit() {
1485    Mutex::Autolock autolock(mLock);
1486    // Only notify once.
1487    if (mSendNotify) {
1488        return;
1489    }
1490    ALOGW("Recorded file size is approaching limit %" PRId64 "bytes",
1491        mMaxFileSizeLimitBytes);
1492    notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_APPROACHING, 0);
1493    mSendNotify = true;
1494}
1495
1496void MPEG4Writer::write(const void *data, size_t size) {
1497    write(data, 1, size);
1498}
1499
1500bool MPEG4Writer::isFileStreamable() const {
1501    return mStreamableFile;
1502}
1503
1504bool MPEG4Writer::exceedsFileSizeLimit() {
1505    // No limit
1506    if (mMaxFileSizeLimitBytes == 0) {
1507        return false;
1508    }
1509    int64_t nTotalBytesEstimate = static_cast<int64_t>(mEstimatedMoovBoxSize);
1510    for (List<Track *>::iterator it = mTracks.begin();
1511         it != mTracks.end(); ++it) {
1512        nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes();
1513    }
1514
1515    if (!mStreamableFile) {
1516        // Add 1024 bytes as error tolerance
1517        return nTotalBytesEstimate + 1024 >= mMaxFileSizeLimitBytes;
1518    }
1519
1520    // Be conservative in the estimate: do not exceed 95% of
1521    // the target file limit. For small target file size limit, though,
1522    // this will not help.
1523    return (nTotalBytesEstimate >= (95 * mMaxFileSizeLimitBytes) / 100);
1524}
1525
1526bool MPEG4Writer::approachingFileSizeLimit() {
1527    // No limit
1528    if (mMaxFileSizeLimitBytes == 0) {
1529        return false;
1530    }
1531
1532    int64_t nTotalBytesEstimate = static_cast<int64_t>(mEstimatedMoovBoxSize);
1533    for (List<Track *>::iterator it = mTracks.begin();
1534         it != mTracks.end(); ++it) {
1535        nTotalBytesEstimate += (*it)->getEstimatedTrackSizeBytes();
1536    }
1537
1538    if (!mStreamableFile) {
1539        // Add 1024 bytes as error tolerance
1540        return nTotalBytesEstimate + 1024 >= (90 * mMaxFileSizeLimitBytes) / 100;
1541    }
1542
1543    return (nTotalBytesEstimate >= (90 * mMaxFileSizeLimitBytes) / 100);
1544}
1545
1546bool MPEG4Writer::exceedsFileDurationLimit() {
1547    // No limit
1548    if (mMaxFileDurationLimitUs == 0) {
1549        return false;
1550    }
1551
1552    for (List<Track *>::iterator it = mTracks.begin();
1553         it != mTracks.end(); ++it) {
1554        if ((*it)->getDurationUs() >= mMaxFileDurationLimitUs) {
1555            return true;
1556        }
1557    }
1558    return false;
1559}
1560
1561bool MPEG4Writer::reachedEOS() {
1562    bool allDone = true;
1563    for (List<Track *>::iterator it = mTracks.begin();
1564         it != mTracks.end(); ++it) {
1565        if (!(*it)->reachedEOS()) {
1566            allDone = false;
1567            break;
1568        }
1569    }
1570
1571    return allDone;
1572}
1573
1574void MPEG4Writer::setStartTimestampUs(int64_t timeUs) {
1575    ALOGI("setStartTimestampUs: %" PRId64, timeUs);
1576    CHECK_GE(timeUs, 0ll);
1577    Mutex::Autolock autoLock(mLock);
1578    if (mStartTimestampUs < 0 || mStartTimestampUs > timeUs) {
1579        mStartTimestampUs = timeUs;
1580        ALOGI("Earliest track starting time: %" PRId64, mStartTimestampUs);
1581    }
1582}
1583
1584int64_t MPEG4Writer::getStartTimestampUs() {
1585    Mutex::Autolock autoLock(mLock);
1586    return mStartTimestampUs;
1587}
1588
1589size_t MPEG4Writer::numTracks() {
1590    Mutex::Autolock autolock(mLock);
1591    return mTracks.size();
1592}
1593
1594////////////////////////////////////////////////////////////////////////////////
1595
1596MPEG4Writer::Track::Track(
1597        MPEG4Writer *owner, const sp<IMediaSource> &source, size_t trackId)
1598    : mOwner(owner),
1599      mMeta(source->getFormat()),
1600      mSource(source),
1601      mDone(false),
1602      mPaused(false),
1603      mResumed(false),
1604      mStarted(false),
1605      mGotStartKeyFrame(false),
1606      mIsMalformed(false),
1607      mTrackId(trackId),
1608      mTrackDurationUs(0),
1609      mEstimatedTrackSizeBytes(0),
1610      mSamplesHaveSameSize(true),
1611      mStszTableEntries(new ListTableEntries<uint32_t, 1>(1000)),
1612      mStcoTableEntries(new ListTableEntries<uint32_t, 1>(1000)),
1613      mCo64TableEntries(new ListTableEntries<off64_t, 1>(1000)),
1614      mStscTableEntries(new ListTableEntries<uint32_t, 3>(1000)),
1615      mStssTableEntries(new ListTableEntries<uint32_t, 1>(1000)),
1616      mSttsTableEntries(new ListTableEntries<uint32_t, 2>(1000)),
1617      mCttsTableEntries(new ListTableEntries<uint32_t, 2>(1000)),
1618      mCodecSpecificData(NULL),
1619      mCodecSpecificDataSize(0),
1620      mGotAllCodecSpecificData(false),
1621      mReachedEOS(false),
1622      mRotation(0) {
1623    getCodecSpecificDataFromInputFormatIfPossible();
1624
1625    const char *mime;
1626    mMeta->findCString(kKeyMIMEType, &mime);
1627    mIsAvc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC);
1628    mIsHevc = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_HEVC);
1629    mIsAudio = !strncasecmp(mime, "audio/", 6);
1630    mIsVideo = !strncasecmp(mime, "video/", 6);
1631    mIsMPEG4 = !strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4) ||
1632               !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC);
1633
1634    // store temporal layer count
1635    if (mIsVideo) {
1636        int32_t count;
1637        if (mMeta->findInt32(kKeyTemporalLayerCount, &count) && count > 1) {
1638            mOwner->setTemporalLayerCount(count);
1639        }
1640    }
1641
1642    setTimeScale();
1643}
1644
1645// Clear all the internal states except the CSD data.
1646void MPEG4Writer::Track::resetInternal() {
1647      mDone = false;
1648      mPaused = false;
1649      mResumed = false;
1650      mStarted = false;
1651      mGotStartKeyFrame = false;
1652      mIsMalformed = false;
1653      mTrackDurationUs = 0;
1654      mEstimatedTrackSizeBytes = 0;
1655      mSamplesHaveSameSize = 0;
1656      if (mStszTableEntries != NULL) {
1657         delete mStszTableEntries;
1658         mStszTableEntries = new ListTableEntries<uint32_t, 1>(1000);
1659      }
1660
1661      if (mStcoTableEntries != NULL) {
1662         delete mStcoTableEntries;
1663         mStcoTableEntries = new ListTableEntries<uint32_t, 1>(1000);
1664      }
1665      if (mCo64TableEntries != NULL) {
1666         delete mCo64TableEntries;
1667         mCo64TableEntries = new ListTableEntries<off64_t, 1>(1000);
1668      }
1669
1670      if (mStscTableEntries != NULL) {
1671         delete mStscTableEntries;
1672         mStscTableEntries = new ListTableEntries<uint32_t, 3>(1000);
1673      }
1674      if (mStssTableEntries != NULL) {
1675         delete mStssTableEntries;
1676         mStssTableEntries = new ListTableEntries<uint32_t, 1>(1000);
1677      }
1678      if (mSttsTableEntries != NULL) {
1679         delete mSttsTableEntries;
1680         mSttsTableEntries = new ListTableEntries<uint32_t, 2>(1000);
1681      }
1682      if (mCttsTableEntries != NULL) {
1683         delete mCttsTableEntries;
1684         mCttsTableEntries = new ListTableEntries<uint32_t, 2>(1000);
1685      }
1686      mReachedEOS = false;
1687}
1688
1689void MPEG4Writer::Track::updateTrackSizeEstimate() {
1690
1691    uint32_t stcoBoxCount = (mOwner->use32BitFileOffset()
1692                            ? mStcoTableEntries->count()
1693                            : mCo64TableEntries->count());
1694    int64_t stcoBoxSizeBytes = stcoBoxCount * 4;
1695    int64_t stszBoxSizeBytes = mSamplesHaveSameSize? 4: (mStszTableEntries->count() * 4);
1696
1697    mEstimatedTrackSizeBytes = mMdatSizeBytes;  // media data size
1698    if (!mOwner->isFileStreamable()) {
1699        // Reserved free space is not large enough to hold
1700        // all meta data and thus wasted.
1701        mEstimatedTrackSizeBytes += mStscTableEntries->count() * 12 +  // stsc box size
1702                                    mStssTableEntries->count() * 4 +   // stss box size
1703                                    mSttsTableEntries->count() * 8 +   // stts box size
1704                                    mCttsTableEntries->count() * 8 +   // ctts box size
1705                                    stcoBoxSizeBytes +           // stco box size
1706                                    stszBoxSizeBytes;            // stsz box size
1707    }
1708}
1709
1710void MPEG4Writer::Track::addOneStscTableEntry(
1711        size_t chunkId, size_t sampleId) {
1712
1713        mStscTableEntries->add(htonl(chunkId));
1714        mStscTableEntries->add(htonl(sampleId));
1715        mStscTableEntries->add(htonl(1));
1716}
1717
1718void MPEG4Writer::Track::addOneStssTableEntry(size_t sampleId) {
1719    mStssTableEntries->add(htonl(sampleId));
1720}
1721
1722void MPEG4Writer::Track::addOneSttsTableEntry(
1723        size_t sampleCount, int32_t duration) {
1724
1725    if (duration == 0) {
1726        ALOGW("0-duration samples found: %zu", sampleCount);
1727    }
1728    mSttsTableEntries->add(htonl(sampleCount));
1729    mSttsTableEntries->add(htonl(duration));
1730}
1731
1732void MPEG4Writer::Track::addOneCttsTableEntry(
1733        size_t sampleCount, int32_t duration) {
1734
1735    if (!mIsVideo) {
1736        return;
1737    }
1738    mCttsTableEntries->add(htonl(sampleCount));
1739    mCttsTableEntries->add(htonl(duration));
1740}
1741
1742status_t MPEG4Writer::setNextFd(int fd) {
1743    ALOGV("addNextFd");
1744    Mutex::Autolock l(mLock);
1745    if (mLooper == NULL) {
1746        mReflector = new AHandlerReflector<MPEG4Writer>(this);
1747        mLooper = new ALooper;
1748        mLooper->registerHandler(mReflector);
1749        mLooper->start();
1750    }
1751
1752    if (mNextFd != -1) {
1753        // No need to set a new FD yet.
1754        return INVALID_OPERATION;
1755    }
1756    mNextFd = fd;
1757    return OK;
1758}
1759
1760void MPEG4Writer::Track::addChunkOffset(off64_t offset) {
1761    if (mOwner->use32BitFileOffset()) {
1762        uint32_t value = offset;
1763        mStcoTableEntries->add(htonl(value));
1764    } else {
1765        mCo64TableEntries->add(hton64(offset));
1766    }
1767}
1768
1769void MPEG4Writer::Track::setTimeScale() {
1770    ALOGV("setTimeScale");
1771    // Default time scale
1772    mTimeScale = 90000;
1773
1774    if (mIsAudio) {
1775        // Use the sampling rate as the default time scale for audio track.
1776        int32_t sampleRate;
1777        bool success = mMeta->findInt32(kKeySampleRate, &sampleRate);
1778        CHECK(success);
1779        mTimeScale = sampleRate;
1780    }
1781
1782    // If someone would like to overwrite the timescale, use user-supplied value.
1783    int32_t timeScale;
1784    if (mMeta->findInt32(kKeyTimeScale, &timeScale)) {
1785        mTimeScale = timeScale;
1786    }
1787
1788    CHECK_GT(mTimeScale, 0);
1789}
1790
1791void MPEG4Writer::onMessageReceived(const sp<AMessage> &msg) {
1792    switch (msg->what()) {
1793        case kWhatSwitch:
1794        {
1795            finishCurrentSession();
1796            mLock.lock();
1797            int fd = mNextFd;
1798            mNextFd = -1;
1799            mLock.unlock();
1800            initInternal(fd);
1801            start(mStartMeta.get());
1802            mSwitchPending = false;
1803            notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED, 0);
1804            break;
1805        }
1806        default:
1807        TRESPASS();
1808    }
1809}
1810
1811void MPEG4Writer::Track::getCodecSpecificDataFromInputFormatIfPossible() {
1812    const char *mime;
1813
1814    CHECK(mMeta->findCString(kKeyMIMEType, &mime));
1815
1816    uint32_t type;
1817    const void *data = NULL;
1818    size_t size = 0;
1819    if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_AVC)) {
1820        mMeta->findData(kKeyAVCC, &type, &data, &size);
1821    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_HEVC)) {
1822        mMeta->findData(kKeyHVCC, &type, &data, &size);
1823    } else if (!strcasecmp(mime, MEDIA_MIMETYPE_VIDEO_MPEG4)
1824            || !strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)) {
1825        if (mMeta->findData(kKeyESDS, &type, &data, &size)) {
1826            ESDS esds(data, size);
1827            if (esds.getCodecSpecificInfo(&data, &size) != OK) {
1828                data = NULL;
1829                size = 0;
1830            }
1831        }
1832    }
1833    if (data != NULL && copyCodecSpecificData((uint8_t *)data, size) == OK) {
1834        mGotAllCodecSpecificData = true;
1835    }
1836}
1837
1838MPEG4Writer::Track::~Track() {
1839    stop();
1840
1841    delete mStszTableEntries;
1842    delete mStcoTableEntries;
1843    delete mCo64TableEntries;
1844    delete mStscTableEntries;
1845    delete mSttsTableEntries;
1846    delete mStssTableEntries;
1847    delete mCttsTableEntries;
1848
1849    mStszTableEntries = NULL;
1850    mStcoTableEntries = NULL;
1851    mCo64TableEntries = NULL;
1852    mStscTableEntries = NULL;
1853    mSttsTableEntries = NULL;
1854    mStssTableEntries = NULL;
1855    mCttsTableEntries = NULL;
1856
1857    if (mCodecSpecificData != NULL) {
1858        free(mCodecSpecificData);
1859        mCodecSpecificData = NULL;
1860    }
1861}
1862
1863void MPEG4Writer::Track::initTrackingProgressStatus(MetaData *params) {
1864    ALOGV("initTrackingProgressStatus");
1865    mPreviousTrackTimeUs = -1;
1866    mTrackingProgressStatus = false;
1867    mTrackEveryTimeDurationUs = 0;
1868    {
1869        int64_t timeUs;
1870        if (params && params->findInt64(kKeyTrackTimeStatus, &timeUs)) {
1871            ALOGV("Receive request to track progress status for every %" PRId64 " us", timeUs);
1872            mTrackEveryTimeDurationUs = timeUs;
1873            mTrackingProgressStatus = true;
1874        }
1875    }
1876}
1877
1878// static
1879void *MPEG4Writer::ThreadWrapper(void *me) {
1880    ALOGV("ThreadWrapper: %p", me);
1881    MPEG4Writer *writer = static_cast<MPEG4Writer *>(me);
1882    writer->threadFunc();
1883    return NULL;
1884}
1885
1886void MPEG4Writer::bufferChunk(const Chunk& chunk) {
1887    ALOGV("bufferChunk: %p", chunk.mTrack);
1888    Mutex::Autolock autolock(mLock);
1889    CHECK_EQ(mDone, false);
1890
1891    for (List<ChunkInfo>::iterator it = mChunkInfos.begin();
1892         it != mChunkInfos.end(); ++it) {
1893
1894        if (chunk.mTrack == it->mTrack) {  // Found owner
1895            it->mChunks.push_back(chunk);
1896            mChunkReadyCondition.signal();
1897            return;
1898        }
1899    }
1900
1901    CHECK(!"Received a chunk for a unknown track");
1902}
1903
1904void MPEG4Writer::writeChunkToFile(Chunk* chunk) {
1905    ALOGV("writeChunkToFile: %" PRId64 " from %s track",
1906        chunk->mTimeStampUs, chunk->mTrack->getTrackType());
1907
1908    int32_t isFirstSample = true;
1909    while (!chunk->mSamples.empty()) {
1910        List<MediaBuffer *>::iterator it = chunk->mSamples.begin();
1911
1912        off64_t offset = (chunk->mTrack->isAvc() || chunk->mTrack->isHevc())
1913                                ? addMultipleLengthPrefixedSamples_l(*it)
1914                                : addSample_l(*it);
1915
1916        if (isFirstSample) {
1917            chunk->mTrack->addChunkOffset(offset);
1918            isFirstSample = false;
1919        }
1920
1921        (*it)->release();
1922        (*it) = NULL;
1923        chunk->mSamples.erase(it);
1924    }
1925    chunk->mSamples.clear();
1926}
1927
1928void MPEG4Writer::writeAllChunks() {
1929    ALOGV("writeAllChunks");
1930    size_t outstandingChunks = 0;
1931    Chunk chunk;
1932    while (findChunkToWrite(&chunk)) {
1933        writeChunkToFile(&chunk);
1934        ++outstandingChunks;
1935    }
1936
1937    sendSessionSummary();
1938
1939    mChunkInfos.clear();
1940    ALOGD("%zu chunks are written in the last batch", outstandingChunks);
1941}
1942
1943bool MPEG4Writer::findChunkToWrite(Chunk *chunk) {
1944    ALOGV("findChunkToWrite");
1945
1946    int64_t minTimestampUs = 0x7FFFFFFFFFFFFFFFLL;
1947    Track *track = NULL;
1948    for (List<ChunkInfo>::iterator it = mChunkInfos.begin();
1949         it != mChunkInfos.end(); ++it) {
1950        if (!it->mChunks.empty()) {
1951            List<Chunk>::iterator chunkIt = it->mChunks.begin();
1952            if (chunkIt->mTimeStampUs < minTimestampUs) {
1953                minTimestampUs = chunkIt->mTimeStampUs;
1954                track = it->mTrack;
1955            }
1956        }
1957    }
1958
1959    if (track == NULL) {
1960        ALOGV("Nothing to be written after all");
1961        return false;
1962    }
1963
1964    if (mIsFirstChunk) {
1965        mIsFirstChunk = false;
1966    }
1967
1968    for (List<ChunkInfo>::iterator it = mChunkInfos.begin();
1969         it != mChunkInfos.end(); ++it) {
1970        if (it->mTrack == track) {
1971            *chunk = *(it->mChunks.begin());
1972            it->mChunks.erase(it->mChunks.begin());
1973            CHECK_EQ(chunk->mTrack, track);
1974
1975            int64_t interChunkTimeUs =
1976                chunk->mTimeStampUs - it->mPrevChunkTimestampUs;
1977            if (interChunkTimeUs > it->mPrevChunkTimestampUs) {
1978                it->mMaxInterChunkDurUs = interChunkTimeUs;
1979            }
1980
1981            return true;
1982        }
1983    }
1984
1985    return false;
1986}
1987
1988void MPEG4Writer::threadFunc() {
1989    ALOGV("threadFunc");
1990
1991    prctl(PR_SET_NAME, (unsigned long)"MPEG4Writer", 0, 0, 0);
1992
1993    Mutex::Autolock autoLock(mLock);
1994    while (!mDone) {
1995        Chunk chunk;
1996        bool chunkFound = false;
1997
1998        while (!mDone && !(chunkFound = findChunkToWrite(&chunk))) {
1999            mChunkReadyCondition.wait(mLock);
2000        }
2001
2002        // In real time recording mode, write without holding the lock in order
2003        // to reduce the blocking time for media track threads.
2004        // Otherwise, hold the lock until the existing chunks get written to the
2005        // file.
2006        if (chunkFound) {
2007            if (mIsRealTimeRecording) {
2008                mLock.unlock();
2009            }
2010            writeChunkToFile(&chunk);
2011            if (mIsRealTimeRecording) {
2012                mLock.lock();
2013            }
2014        }
2015    }
2016
2017    writeAllChunks();
2018}
2019
2020status_t MPEG4Writer::startWriterThread() {
2021    ALOGV("startWriterThread");
2022
2023    mDone = false;
2024    mIsFirstChunk = true;
2025    mDriftTimeUs = 0;
2026    for (List<Track *>::iterator it = mTracks.begin();
2027         it != mTracks.end(); ++it) {
2028        ChunkInfo info;
2029        info.mTrack = *it;
2030        info.mPrevChunkTimestampUs = 0;
2031        info.mMaxInterChunkDurUs = 0;
2032        mChunkInfos.push_back(info);
2033    }
2034
2035    pthread_attr_t attr;
2036    pthread_attr_init(&attr);
2037    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
2038    pthread_create(&mThread, &attr, ThreadWrapper, this);
2039    pthread_attr_destroy(&attr);
2040    mWriterThreadStarted = true;
2041    return OK;
2042}
2043
2044
2045status_t MPEG4Writer::Track::start(MetaData *params) {
2046    if (!mDone && mPaused) {
2047        mPaused = false;
2048        mResumed = true;
2049        return OK;
2050    }
2051
2052    int64_t startTimeUs;
2053    if (params == NULL || !params->findInt64(kKeyTime, &startTimeUs)) {
2054        startTimeUs = 0;
2055    }
2056    mStartTimeRealUs = startTimeUs;
2057
2058    int32_t rotationDegrees;
2059    if (mIsVideo && params && params->findInt32(kKeyRotation, &rotationDegrees)) {
2060        mRotation = rotationDegrees;
2061    }
2062
2063    initTrackingProgressStatus(params);
2064
2065    sp<MetaData> meta = new MetaData;
2066    if (mOwner->isRealTimeRecording() && mOwner->numTracks() > 1) {
2067        /*
2068         * This extra delay of accepting incoming audio/video signals
2069         * helps to align a/v start time at the beginning of a recording
2070         * session, and it also helps eliminate the "recording" sound for
2071         * camcorder applications.
2072         *
2073         * If client does not set the start time offset, we fall back to
2074         * use the default initial delay value.
2075         */
2076        int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL;
2077        if (startTimeOffsetUs < 0) {  // Start time offset was not set
2078            startTimeOffsetUs = kInitialDelayTimeUs;
2079        }
2080        startTimeUs += startTimeOffsetUs;
2081        ALOGI("Start time offset: %" PRId64 " us", startTimeOffsetUs);
2082    }
2083
2084    meta->setInt64(kKeyTime, startTimeUs);
2085
2086    status_t err = mSource->start(meta.get());
2087    if (err != OK) {
2088        mDone = mReachedEOS = true;
2089        return err;
2090    }
2091
2092    pthread_attr_t attr;
2093    pthread_attr_init(&attr);
2094    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
2095
2096    mDone = false;
2097    mStarted = true;
2098    mTrackDurationUs = 0;
2099    mReachedEOS = false;
2100    mEstimatedTrackSizeBytes = 0;
2101    mMdatSizeBytes = 0;
2102    mMaxChunkDurationUs = 0;
2103    mLastDecodingTimeUs = -1;
2104
2105    pthread_create(&mThread, &attr, ThreadWrapper, this);
2106    pthread_attr_destroy(&attr);
2107
2108    return OK;
2109}
2110
2111status_t MPEG4Writer::Track::pause() {
2112    mPaused = true;
2113    return OK;
2114}
2115
2116status_t MPEG4Writer::Track::stop(bool stopSource) {
2117    ALOGD("%s track stopping. %s source", getTrackType(), stopSource ? "Stop" : "Not Stop");
2118    if (!mStarted) {
2119        ALOGE("Stop() called but track is not started");
2120        return ERROR_END_OF_STREAM;
2121    }
2122
2123    if (mDone) {
2124        return OK;
2125    }
2126    mDone = true;
2127    if (stopSource) {
2128        ALOGD("%s track source stopping", getTrackType());
2129        mSource->stop();
2130        ALOGD("%s track source stopped", getTrackType());
2131    }
2132
2133    void *dummy;
2134    pthread_join(mThread, &dummy);
2135    status_t err = static_cast<status_t>(reinterpret_cast<uintptr_t>(dummy));
2136
2137    ALOGD("%s track stopped. %s source", getTrackType(), stopSource ? "Stop" : "Not Stop");
2138    return err;
2139}
2140
2141bool MPEG4Writer::Track::reachedEOS() {
2142    return mReachedEOS;
2143}
2144
2145// static
2146void *MPEG4Writer::Track::ThreadWrapper(void *me) {
2147    Track *track = static_cast<Track *>(me);
2148
2149    status_t err = track->threadEntry();
2150    return (void *)(uintptr_t)err;
2151}
2152
2153static void getNalUnitType(uint8_t byte, uint8_t* type) {
2154    ALOGV("getNalUnitType: %d", byte);
2155
2156    // nal_unit_type: 5-bit unsigned integer
2157    *type = (byte & 0x1F);
2158}
2159
2160const uint8_t *MPEG4Writer::Track::parseParamSet(
2161        const uint8_t *data, size_t length, int type, size_t *paramSetLen) {
2162
2163    ALOGV("parseParamSet");
2164    CHECK(type == kNalUnitTypeSeqParamSet ||
2165          type == kNalUnitTypePicParamSet);
2166
2167    const uint8_t *nextStartCode = findNextNalStartCode(data, length);
2168    *paramSetLen = nextStartCode - data;
2169    if (*paramSetLen == 0) {
2170        ALOGE("Param set is malformed, since its length is 0");
2171        return NULL;
2172    }
2173
2174    AVCParamSet paramSet(*paramSetLen, data);
2175    if (type == kNalUnitTypeSeqParamSet) {
2176        if (*paramSetLen < 4) {
2177            ALOGE("Seq parameter set malformed");
2178            return NULL;
2179        }
2180        if (mSeqParamSets.empty()) {
2181            mProfileIdc = data[1];
2182            mProfileCompatible = data[2];
2183            mLevelIdc = data[3];
2184        } else {
2185            if (mProfileIdc != data[1] ||
2186                mProfileCompatible != data[2] ||
2187                mLevelIdc != data[3]) {
2188                // COULD DO: set profile/level to the lowest required to support all SPSs
2189                ALOGE("Inconsistent profile/level found in seq parameter sets");
2190                return NULL;
2191            }
2192        }
2193        mSeqParamSets.push_back(paramSet);
2194    } else {
2195        mPicParamSets.push_back(paramSet);
2196    }
2197    return nextStartCode;
2198}
2199
2200status_t MPEG4Writer::Track::copyAVCCodecSpecificData(
2201        const uint8_t *data, size_t size) {
2202    ALOGV("copyAVCCodecSpecificData");
2203
2204    // 2 bytes for each of the parameter set length field
2205    // plus the 7 bytes for the header
2206    return copyCodecSpecificData(data, size, 4 + 7);
2207}
2208
2209status_t MPEG4Writer::Track::copyHEVCCodecSpecificData(
2210        const uint8_t *data, size_t size) {
2211    ALOGV("copyHEVCCodecSpecificData");
2212
2213    // Min length of HEVC CSD is 23. (ISO/IEC 14496-15:2014 Chapter 8.3.3.1.2)
2214    return copyCodecSpecificData(data, size, 23);
2215}
2216
2217status_t MPEG4Writer::Track::copyCodecSpecificData(
2218        const uint8_t *data, size_t size, size_t minLength) {
2219    if (size < minLength) {
2220        ALOGE("Codec specific data length too short: %zu", size);
2221        return ERROR_MALFORMED;
2222    }
2223
2224    mCodecSpecificData = malloc(size);
2225    if (mCodecSpecificData == NULL) {
2226        ALOGE("Failed allocating codec specific data");
2227        return NO_MEMORY;
2228    }
2229    mCodecSpecificDataSize = size;
2230    memcpy(mCodecSpecificData, data, size);
2231    return OK;
2232}
2233
2234status_t MPEG4Writer::Track::parseAVCCodecSpecificData(
2235        const uint8_t *data, size_t size) {
2236
2237    ALOGV("parseAVCCodecSpecificData");
2238    // Data starts with a start code.
2239    // SPS and PPS are separated with start codes.
2240    // Also, SPS must come before PPS
2241    uint8_t type = kNalUnitTypeSeqParamSet;
2242    bool gotSps = false;
2243    bool gotPps = false;
2244    const uint8_t *tmp = data;
2245    const uint8_t *nextStartCode = data;
2246    size_t bytesLeft = size;
2247    size_t paramSetLen = 0;
2248    mCodecSpecificDataSize = 0;
2249    while (bytesLeft > 4 && !memcmp("\x00\x00\x00\x01", tmp, 4)) {
2250        getNalUnitType(*(tmp + 4), &type);
2251        if (type == kNalUnitTypeSeqParamSet) {
2252            if (gotPps) {
2253                ALOGE("SPS must come before PPS");
2254                return ERROR_MALFORMED;
2255            }
2256            if (!gotSps) {
2257                gotSps = true;
2258            }
2259            nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, &paramSetLen);
2260        } else if (type == kNalUnitTypePicParamSet) {
2261            if (!gotSps) {
2262                ALOGE("SPS must come before PPS");
2263                return ERROR_MALFORMED;
2264            }
2265            if (!gotPps) {
2266                gotPps = true;
2267            }
2268            nextStartCode = parseParamSet(tmp + 4, bytesLeft - 4, type, &paramSetLen);
2269        } else {
2270            ALOGE("Only SPS and PPS Nal units are expected");
2271            return ERROR_MALFORMED;
2272        }
2273
2274        if (nextStartCode == NULL) {
2275            return ERROR_MALFORMED;
2276        }
2277
2278        // Move on to find the next parameter set
2279        bytesLeft -= nextStartCode - tmp;
2280        tmp = nextStartCode;
2281        mCodecSpecificDataSize += (2 + paramSetLen);
2282    }
2283
2284    {
2285        // Check on the number of seq parameter sets
2286        size_t nSeqParamSets = mSeqParamSets.size();
2287        if (nSeqParamSets == 0) {
2288            ALOGE("Cound not find sequence parameter set");
2289            return ERROR_MALFORMED;
2290        }
2291
2292        if (nSeqParamSets > 0x1F) {
2293            ALOGE("Too many seq parameter sets (%zu) found", nSeqParamSets);
2294            return ERROR_MALFORMED;
2295        }
2296    }
2297
2298    {
2299        // Check on the number of pic parameter sets
2300        size_t nPicParamSets = mPicParamSets.size();
2301        if (nPicParamSets == 0) {
2302            ALOGE("Cound not find picture parameter set");
2303            return ERROR_MALFORMED;
2304        }
2305        if (nPicParamSets > 0xFF) {
2306            ALOGE("Too many pic parameter sets (%zd) found", nPicParamSets);
2307            return ERROR_MALFORMED;
2308        }
2309    }
2310// FIXME:
2311// Add chromat_format_idc, bit depth values, etc for AVC/h264 high profile and above
2312// and remove #if 0
2313#if 0
2314    {
2315        // Check on the profiles
2316        // These profiles requires additional parameter set extensions
2317        if (mProfileIdc == 100 || mProfileIdc == 110 ||
2318            mProfileIdc == 122 || mProfileIdc == 144) {
2319            ALOGE("Sorry, no support for profile_idc: %d!", mProfileIdc);
2320            return BAD_VALUE;
2321        }
2322    }
2323#endif
2324    return OK;
2325}
2326
2327status_t MPEG4Writer::Track::makeAVCCodecSpecificData(
2328        const uint8_t *data, size_t size) {
2329
2330    if (mCodecSpecificData != NULL) {
2331        ALOGE("Already have codec specific data");
2332        return ERROR_MALFORMED;
2333    }
2334
2335    if (size < 4) {
2336        ALOGE("Codec specific data length too short: %zu", size);
2337        return ERROR_MALFORMED;
2338    }
2339
2340    // Data is in the form of AVCCodecSpecificData
2341    if (memcmp("\x00\x00\x00\x01", data, 4)) {
2342        return copyAVCCodecSpecificData(data, size);
2343    }
2344
2345    if (parseAVCCodecSpecificData(data, size) != OK) {
2346        return ERROR_MALFORMED;
2347    }
2348
2349    // ISO 14496-15: AVC file format
2350    mCodecSpecificDataSize += 7;  // 7 more bytes in the header
2351    mCodecSpecificData = malloc(mCodecSpecificDataSize);
2352    if (mCodecSpecificData == NULL) {
2353        mCodecSpecificDataSize = 0;
2354        ALOGE("Failed allocating codec specific data");
2355        return NO_MEMORY;
2356    }
2357    uint8_t *header = (uint8_t *)mCodecSpecificData;
2358    header[0] = 1;                     // version
2359    header[1] = mProfileIdc;           // profile indication
2360    header[2] = mProfileCompatible;    // profile compatibility
2361    header[3] = mLevelIdc;
2362
2363    // 6-bit '111111' followed by 2-bit to lengthSizeMinuusOne
2364    if (mOwner->useNalLengthFour()) {
2365        header[4] = 0xfc | 3;  // length size == 4 bytes
2366    } else {
2367        header[4] = 0xfc | 1;  // length size == 2 bytes
2368    }
2369
2370    // 3-bit '111' followed by 5-bit numSequenceParameterSets
2371    int nSequenceParamSets = mSeqParamSets.size();
2372    header[5] = 0xe0 | nSequenceParamSets;
2373    header += 6;
2374    for (List<AVCParamSet>::iterator it = mSeqParamSets.begin();
2375         it != mSeqParamSets.end(); ++it) {
2376        // 16-bit sequence parameter set length
2377        uint16_t seqParamSetLength = it->mLength;
2378        header[0] = seqParamSetLength >> 8;
2379        header[1] = seqParamSetLength & 0xff;
2380
2381        // SPS NAL unit (sequence parameter length bytes)
2382        memcpy(&header[2], it->mData, seqParamSetLength);
2383        header += (2 + seqParamSetLength);
2384    }
2385
2386    // 8-bit nPictureParameterSets
2387    int nPictureParamSets = mPicParamSets.size();
2388    header[0] = nPictureParamSets;
2389    header += 1;
2390    for (List<AVCParamSet>::iterator it = mPicParamSets.begin();
2391         it != mPicParamSets.end(); ++it) {
2392        // 16-bit picture parameter set length
2393        uint16_t picParamSetLength = it->mLength;
2394        header[0] = picParamSetLength >> 8;
2395        header[1] = picParamSetLength & 0xff;
2396
2397        // PPS Nal unit (picture parameter set length bytes)
2398        memcpy(&header[2], it->mData, picParamSetLength);
2399        header += (2 + picParamSetLength);
2400    }
2401
2402    return OK;
2403}
2404
2405
2406status_t MPEG4Writer::Track::parseHEVCCodecSpecificData(
2407        const uint8_t *data, size_t size, HevcParameterSets &paramSets) {
2408
2409    ALOGV("parseHEVCCodecSpecificData");
2410    const uint8_t *tmp = data;
2411    const uint8_t *nextStartCode = data;
2412    size_t bytesLeft = size;
2413    while (bytesLeft > 4 && !memcmp("\x00\x00\x00\x01", tmp, 4)) {
2414        nextStartCode = findNextNalStartCode(tmp + 4, bytesLeft - 4);
2415        status_t err = paramSets.addNalUnit(tmp + 4, (nextStartCode - tmp) - 4);
2416        if (err != OK) {
2417            return ERROR_MALFORMED;
2418        }
2419
2420        // Move on to find the next parameter set
2421        bytesLeft -= nextStartCode - tmp;
2422        tmp = nextStartCode;
2423    }
2424
2425    size_t csdSize = 23;
2426    const size_t numNalUnits = paramSets.getNumNalUnits();
2427    for (size_t i = 0; i < ARRAY_SIZE(kMandatoryHevcNalUnitTypes); ++i) {
2428        int type = kMandatoryHevcNalUnitTypes[i];
2429        size_t numParamSets = paramSets.getNumNalUnitsOfType(type);
2430        if (numParamSets == 0) {
2431            ALOGE("Cound not find NAL unit of type %d", type);
2432            return ERROR_MALFORMED;
2433        }
2434    }
2435    for (size_t i = 0; i < ARRAY_SIZE(kHevcNalUnitTypes); ++i) {
2436        int type = kHevcNalUnitTypes[i];
2437        size_t numParamSets = paramSets.getNumNalUnitsOfType(type);
2438        if (numParamSets > 0xffff) {
2439            ALOGE("Too many seq parameter sets (%zu) found", numParamSets);
2440            return ERROR_MALFORMED;
2441        }
2442        csdSize += 3;
2443        for (size_t j = 0; j < numNalUnits; ++j) {
2444            if (paramSets.getType(j) != type) {
2445                continue;
2446            }
2447            csdSize += 2 + paramSets.getSize(j);
2448        }
2449    }
2450    mCodecSpecificDataSize = csdSize;
2451    return OK;
2452}
2453
2454status_t MPEG4Writer::Track::makeHEVCCodecSpecificData(
2455        const uint8_t *data, size_t size) {
2456
2457    if (mCodecSpecificData != NULL) {
2458        ALOGE("Already have codec specific data");
2459        return ERROR_MALFORMED;
2460    }
2461
2462    if (size < 4) {
2463        ALOGE("Codec specific data length too short: %zu", size);
2464        return ERROR_MALFORMED;
2465    }
2466
2467    // Data is in the form of HEVCCodecSpecificData
2468    if (memcmp("\x00\x00\x00\x01", data, 4)) {
2469        return copyHEVCCodecSpecificData(data, size);
2470    }
2471
2472    HevcParameterSets paramSets;
2473    if (parseHEVCCodecSpecificData(data, size, paramSets) != OK) {
2474        ALOGE("failed parsing codec specific data");
2475        return ERROR_MALFORMED;
2476    }
2477
2478    mCodecSpecificData = malloc(mCodecSpecificDataSize);
2479    if (mCodecSpecificData == NULL) {
2480        mCodecSpecificDataSize = 0;
2481        ALOGE("Failed allocating codec specific data");
2482        return NO_MEMORY;
2483    }
2484    status_t err = paramSets.makeHvcc((uint8_t *)mCodecSpecificData,
2485            &mCodecSpecificDataSize, mOwner->useNalLengthFour() ? 4 : 2);
2486    if (err != OK) {
2487        ALOGE("failed constructing HVCC atom");
2488        return err;
2489    }
2490
2491    return OK;
2492}
2493
2494/*
2495 * Updates the drift time from the audio track so that
2496 * the video track can get the updated drift time information
2497 * from the file writer. The fluctuation of the drift time of the audio
2498 * encoding path is smoothed out with a simple filter by giving a larger
2499 * weight to more recently drift time. The filter coefficients, 0.5 and 0.5,
2500 * are heuristically determined.
2501 */
2502void MPEG4Writer::Track::updateDriftTime(const sp<MetaData>& meta) {
2503    int64_t driftTimeUs = 0;
2504    if (meta->findInt64(kKeyDriftTime, &driftTimeUs)) {
2505        int64_t prevDriftTimeUs = mOwner->getDriftTimeUs();
2506        int64_t timeUs = (driftTimeUs + prevDriftTimeUs) >> 1;
2507        mOwner->setDriftTimeUs(timeUs);
2508    }
2509}
2510
2511void MPEG4Writer::Track::dumpTimeStamps() {
2512    ALOGE("Dumping %s track's last 10 frames timestamp ", getTrackType());
2513    std::string timeStampString;
2514    for (std::list<std::pair<int64_t, int64_t>>::iterator num = mTimestampDebugHelper.begin();
2515            num != mTimestampDebugHelper.end(); ++num) {
2516        timeStampString += "(" + std::to_string(num->first)+
2517                "us, " + std::to_string(num->second) + "us) ";
2518    }
2519    ALOGE("%s", timeStampString.c_str());
2520}
2521
2522status_t MPEG4Writer::Track::threadEntry() {
2523    int32_t count = 0;
2524    const int64_t interleaveDurationUs = mOwner->interleaveDuration();
2525    const bool hasMultipleTracks = (mOwner->numTracks() > 1);
2526    int64_t chunkTimestampUs = 0;
2527    int32_t nChunks = 0;
2528    int32_t nActualFrames = 0;        // frames containing non-CSD data (non-0 length)
2529    int32_t nZeroLengthFrames = 0;
2530    int64_t lastTimestampUs = 0;      // Previous sample time stamp
2531    int64_t lastDurationUs = 0;       // Between the previous two samples
2532    int64_t currDurationTicks = 0;    // Timescale based ticks
2533    int64_t lastDurationTicks = 0;    // Timescale based ticks
2534    int32_t sampleCount = 1;          // Sample count in the current stts table entry
2535    uint32_t previousSampleSize = 0;  // Size of the previous sample
2536    int64_t previousPausedDurationUs = 0;
2537    int64_t timestampUs = 0;
2538    int64_t cttsOffsetTimeUs = 0;
2539    int64_t currCttsOffsetTimeTicks = 0;   // Timescale based ticks
2540    int64_t lastCttsOffsetTimeTicks = -1;  // Timescale based ticks
2541    int32_t cttsSampleCount = 0;           // Sample count in the current ctts table entry
2542    uint32_t lastSamplesPerChunk = 0;
2543
2544    if (mIsAudio) {
2545        prctl(PR_SET_NAME, (unsigned long)"AudioTrackEncoding", 0, 0, 0);
2546    } else if (mIsVideo) {
2547        prctl(PR_SET_NAME, (unsigned long)"VideoTrackEncoding", 0, 0, 0);
2548    } else {
2549        prctl(PR_SET_NAME, (unsigned long)"MetadataTrackEncoding", 0, 0, 0);
2550    }
2551
2552    if (mOwner->isRealTimeRecording()) {
2553        androidSetThreadPriority(0, ANDROID_PRIORITY_AUDIO);
2554    }
2555
2556    sp<MetaData> meta_data;
2557
2558    status_t err = OK;
2559    MediaBuffer *buffer;
2560    const char *trackName = getTrackType();
2561    while (!mDone && (err = mSource->read(&buffer)) == OK) {
2562        if (buffer->range_length() == 0) {
2563            buffer->release();
2564            buffer = NULL;
2565            ++nZeroLengthFrames;
2566            continue;
2567        }
2568
2569        // If the codec specific data has not been received yet, delay pause.
2570        // After the codec specific data is received, discard what we received
2571        // when the track is to be paused.
2572        if (mPaused && !mResumed) {
2573            buffer->release();
2574            buffer = NULL;
2575            continue;
2576        }
2577
2578        ++count;
2579
2580        int32_t isCodecConfig;
2581        if (buffer->meta_data()->findInt32(kKeyIsCodecConfig, &isCodecConfig)
2582                && isCodecConfig) {
2583            // if config format (at track addition) already had CSD, keep that
2584            // UNLESS we have not received any frames yet.
2585            // TODO: for now the entire CSD has to come in one frame for encoders, even though
2586            // they need to be spread out for decoders.
2587            if (mGotAllCodecSpecificData && nActualFrames > 0) {
2588                ALOGI("ignoring additional CSD for video track after first frame");
2589            } else {
2590                mMeta = mSource->getFormat(); // get output format after format change
2591                status_t err;
2592                if (mIsAvc) {
2593                    err = makeAVCCodecSpecificData(
2594                            (const uint8_t *)buffer->data()
2595                                + buffer->range_offset(),
2596                            buffer->range_length());
2597                } else if (mIsHevc) {
2598                    err = makeHEVCCodecSpecificData(
2599                            (const uint8_t *)buffer->data()
2600                                + buffer->range_offset(),
2601                            buffer->range_length());
2602                } else if (mIsMPEG4) {
2603                    copyCodecSpecificData((const uint8_t *)buffer->data() + buffer->range_offset(),
2604                            buffer->range_length());
2605                }
2606            }
2607
2608            buffer->release();
2609            buffer = NULL;
2610            if (OK != err) {
2611                mSource->stop();
2612                mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_ERROR,
2613                       mTrackId | MEDIA_RECORDER_TRACK_ERROR_GENERAL, err);
2614                break;
2615            }
2616
2617            mGotAllCodecSpecificData = true;
2618            continue;
2619        }
2620
2621        // Per-frame metadata sample's size must be smaller than max allowed.
2622        if (!mIsVideo && !mIsAudio && buffer->range_length() >= kMaxMetadataSize) {
2623            ALOGW("Buffer size is %zu. Maximum metadata buffer size is %lld for %s track",
2624                    buffer->range_length(), (long long)kMaxMetadataSize, trackName);
2625            buffer->release();
2626            mSource->stop();
2627            mIsMalformed = true;
2628            break;
2629        }
2630
2631        ++nActualFrames;
2632
2633        // Make a deep copy of the MediaBuffer and Metadata and release
2634        // the original as soon as we can
2635        MediaBuffer *copy = new MediaBuffer(buffer->range_length());
2636        memcpy(copy->data(), (uint8_t *)buffer->data() + buffer->range_offset(),
2637                buffer->range_length());
2638        copy->set_range(0, buffer->range_length());
2639        meta_data = new MetaData(*buffer->meta_data().get());
2640        buffer->release();
2641        buffer = NULL;
2642
2643        if (mIsAvc || mIsHevc) StripStartcode(copy);
2644
2645        size_t sampleSize = copy->range_length();
2646        if (mIsAvc || mIsHevc) {
2647            if (mOwner->useNalLengthFour()) {
2648                sampleSize += 4;
2649            } else {
2650                sampleSize += 2;
2651            }
2652        }
2653
2654        // Max file size or duration handling
2655        mMdatSizeBytes += sampleSize;
2656        updateTrackSizeEstimate();
2657
2658        if (mOwner->exceedsFileSizeLimit()) {
2659            if (mOwner->switchFd() != OK) {
2660                ALOGW("Recorded file size exceeds limit %" PRId64 "bytes",
2661                        mOwner->mMaxFileSizeLimitBytes);
2662                mSource->stop();
2663                mOwner->notify(
2664                        MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0);
2665            } else {
2666                ALOGV("%s Current recorded file size exceeds limit %" PRId64 "bytes. Switching output",
2667                        getTrackType(), mOwner->mMaxFileSizeLimitBytes);
2668            }
2669            copy->release();
2670            break;
2671        }
2672
2673        if (mOwner->exceedsFileDurationLimit()) {
2674            ALOGW("Recorded file duration exceeds limit %" PRId64 "microseconds",
2675                    mOwner->mMaxFileDurationLimitUs);
2676            mOwner->notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0);
2677            copy->release();
2678            mSource->stop();
2679            break;
2680        }
2681
2682        if (mOwner->approachingFileSizeLimit()) {
2683            mOwner->notifyApproachingLimit();
2684        }
2685
2686        int32_t isSync = false;
2687        meta_data->findInt32(kKeyIsSyncFrame, &isSync);
2688        CHECK(meta_data->findInt64(kKeyTime, &timestampUs));
2689
2690        // For video, skip the first several non-key frames until getting the first key frame.
2691        if (mIsVideo && !mGotStartKeyFrame && !isSync) {
2692            ALOGD("Video skip non-key frame");
2693            copy->release();
2694            continue;
2695        }
2696        if (mIsVideo && isSync) {
2697            mGotStartKeyFrame = true;
2698        }
2699////////////////////////////////////////////////////////////////////////////////
2700        if (mStszTableEntries->count() == 0) {
2701            mFirstSampleTimeRealUs = systemTime() / 1000;
2702            mStartTimestampUs = timestampUs;
2703            mOwner->setStartTimestampUs(mStartTimestampUs);
2704            previousPausedDurationUs = mStartTimestampUs;
2705        }
2706
2707        if (mResumed) {
2708            int64_t durExcludingEarlierPausesUs = timestampUs - previousPausedDurationUs;
2709            if (WARN_UNLESS(durExcludingEarlierPausesUs >= 0ll, "for %s track", trackName)) {
2710                copy->release();
2711                mSource->stop();
2712                mIsMalformed = true;
2713                break;
2714            }
2715
2716            int64_t pausedDurationUs = durExcludingEarlierPausesUs - mTrackDurationUs;
2717            if (WARN_UNLESS(pausedDurationUs >= lastDurationUs, "for %s track", trackName)) {
2718                copy->release();
2719                mSource->stop();
2720                mIsMalformed = true;
2721                break;
2722            }
2723
2724            previousPausedDurationUs += pausedDurationUs - lastDurationUs;
2725            mResumed = false;
2726        }
2727        std::pair<int64_t, int64_t> timestampPair;
2728        timestampUs -= previousPausedDurationUs;
2729        timestampPair.first = timestampUs;
2730        if (WARN_UNLESS(timestampUs >= 0ll, "for %s track", trackName)) {
2731            copy->release();
2732            mSource->stop();
2733            mIsMalformed = true;
2734            break;
2735        }
2736
2737        if (mIsVideo) {
2738            /*
2739             * Composition time: timestampUs
2740             * Decoding time: decodingTimeUs
2741             * Composition time offset = composition time - decoding time
2742             */
2743            int64_t decodingTimeUs;
2744            CHECK(meta_data->findInt64(kKeyDecodingTime, &decodingTimeUs));
2745            decodingTimeUs -= previousPausedDurationUs;
2746
2747            // ensure non-negative, monotonic decoding time
2748            if (mLastDecodingTimeUs < 0) {
2749                decodingTimeUs = std::max((int64_t)0, decodingTimeUs);
2750            } else {
2751                // increase decoding time by at least the larger vaule of 1 tick and
2752                // 0.1 milliseconds. This needs to take into account the possible
2753                // delta adjustment in DurationTicks in below.
2754                decodingTimeUs = std::max(mLastDecodingTimeUs +
2755                        std::max(100, divUp(1000000, mTimeScale)), decodingTimeUs);
2756            }
2757
2758            mLastDecodingTimeUs = decodingTimeUs;
2759            cttsOffsetTimeUs =
2760                    timestampUs + kMaxCttsOffsetTimeUs - decodingTimeUs;
2761            if (WARN_UNLESS(cttsOffsetTimeUs >= 0ll, "for %s track", trackName)) {
2762                copy->release();
2763                mSource->stop();
2764                mIsMalformed = true;
2765                break;
2766            }
2767
2768            timestampUs = decodingTimeUs;
2769            ALOGV("decoding time: %" PRId64 " and ctts offset time: %" PRId64,
2770                timestampUs, cttsOffsetTimeUs);
2771
2772            // Update ctts box table if necessary
2773            currCttsOffsetTimeTicks =
2774                    (cttsOffsetTimeUs * mTimeScale + 500000LL) / 1000000LL;
2775            if (WARN_UNLESS(currCttsOffsetTimeTicks <= 0x0FFFFFFFFLL, "for %s track", trackName)) {
2776                copy->release();
2777                mSource->stop();
2778                mIsMalformed = true;
2779                break;
2780            }
2781
2782            if (mStszTableEntries->count() == 0) {
2783                // Force the first ctts table entry to have one single entry
2784                // so that we can do adjustment for the initial track start
2785                // time offset easily in writeCttsBox().
2786                lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks;
2787                addOneCttsTableEntry(1, currCttsOffsetTimeTicks);
2788                cttsSampleCount = 0;      // No sample in ctts box is pending
2789            } else {
2790                if (currCttsOffsetTimeTicks != lastCttsOffsetTimeTicks) {
2791                    addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks);
2792                    lastCttsOffsetTimeTicks = currCttsOffsetTimeTicks;
2793                    cttsSampleCount = 1;  // One sample in ctts box is pending
2794                } else {
2795                    ++cttsSampleCount;
2796                }
2797            }
2798
2799            // Update ctts time offset range
2800            if (mStszTableEntries->count() == 0) {
2801                mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks;
2802                mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks;
2803            } else {
2804                if (currCttsOffsetTimeTicks > mMaxCttsOffsetTimeUs) {
2805                    mMaxCttsOffsetTimeUs = currCttsOffsetTimeTicks;
2806                } else if (currCttsOffsetTimeTicks < mMinCttsOffsetTimeUs) {
2807                    mMinCttsOffsetTimeUs = currCttsOffsetTimeTicks;
2808                }
2809            }
2810
2811        }
2812
2813        if (mOwner->isRealTimeRecording()) {
2814            if (mIsAudio) {
2815                updateDriftTime(meta_data);
2816            }
2817        }
2818
2819        if (WARN_UNLESS(timestampUs >= 0ll, "for %s track", trackName)) {
2820            copy->release();
2821            mSource->stop();
2822            mIsMalformed = true;
2823            break;
2824        }
2825
2826        ALOGV("%s media time stamp: %" PRId64 " and previous paused duration %" PRId64,
2827                trackName, timestampUs, previousPausedDurationUs);
2828        if (timestampUs > mTrackDurationUs) {
2829            mTrackDurationUs = timestampUs;
2830        }
2831
2832        // We need to use the time scale based ticks, rather than the
2833        // timestamp itself to determine whether we have to use a new
2834        // stts entry, since we may have rounding errors.
2835        // The calculation is intended to reduce the accumulated
2836        // rounding errors.
2837        currDurationTicks =
2838            ((timestampUs * mTimeScale + 500000LL) / 1000000LL -
2839                (lastTimestampUs * mTimeScale + 500000LL) / 1000000LL);
2840        if (currDurationTicks < 0ll) {
2841            ALOGE("do not support out of order frames (timestamp: %lld < last: %lld for %s track",
2842                    (long long)timestampUs, (long long)lastTimestampUs, trackName);
2843            copy->release();
2844            mSource->stop();
2845            mIsMalformed = true;
2846            break;
2847        }
2848
2849        // if the duration is different for this sample, see if it is close enough to the previous
2850        // duration that we can fudge it and use the same value, to avoid filling the stts table
2851        // with lots of near-identical entries.
2852        // "close enough" here means that the current duration needs to be adjusted by less
2853        // than 0.1 milliseconds
2854        if (lastDurationTicks && (currDurationTicks != lastDurationTicks)) {
2855            int64_t deltaUs = ((lastDurationTicks - currDurationTicks) * 1000000LL
2856                    + (mTimeScale / 2)) / mTimeScale;
2857            if (deltaUs > -100 && deltaUs < 100) {
2858                // use previous ticks, and adjust timestamp as if it was actually that number
2859                // of ticks
2860                currDurationTicks = lastDurationTicks;
2861                timestampUs += deltaUs;
2862            }
2863        }
2864        mStszTableEntries->add(htonl(sampleSize));
2865        if (mStszTableEntries->count() > 2) {
2866
2867            // Force the first sample to have its own stts entry so that
2868            // we can adjust its value later to maintain the A/V sync.
2869            if (mStszTableEntries->count() == 3 || currDurationTicks != lastDurationTicks) {
2870                addOneSttsTableEntry(sampleCount, lastDurationTicks);
2871                sampleCount = 1;
2872            } else {
2873                ++sampleCount;
2874            }
2875
2876        }
2877        if (mSamplesHaveSameSize) {
2878            if (mStszTableEntries->count() >= 2 && previousSampleSize != sampleSize) {
2879                mSamplesHaveSameSize = false;
2880            }
2881            previousSampleSize = sampleSize;
2882        }
2883        ALOGV("%s timestampUs/lastTimestampUs: %" PRId64 "/%" PRId64,
2884                trackName, timestampUs, lastTimestampUs);
2885        lastDurationUs = timestampUs - lastTimestampUs;
2886        lastDurationTicks = currDurationTicks;
2887        lastTimestampUs = timestampUs;
2888        timestampPair.second = timestampUs;
2889        // Insert the timestamp into the mTimestampDebugHelper
2890        if (mTimestampDebugHelper.size() >= kTimestampDebugCount) {
2891            mTimestampDebugHelper.pop_front();
2892        }
2893        mTimestampDebugHelper.push_back(timestampPair);
2894
2895        if (isSync != 0) {
2896            addOneStssTableEntry(mStszTableEntries->count());
2897        }
2898
2899        if (mTrackingProgressStatus) {
2900            if (mPreviousTrackTimeUs <= 0) {
2901                mPreviousTrackTimeUs = mStartTimestampUs;
2902            }
2903            trackProgressStatus(timestampUs);
2904        }
2905        if (!hasMultipleTracks) {
2906            off64_t offset = (mIsAvc || mIsHevc) ? mOwner->addMultipleLengthPrefixedSamples_l(copy)
2907                                 : mOwner->addSample_l(copy);
2908
2909            uint32_t count = (mOwner->use32BitFileOffset()
2910                        ? mStcoTableEntries->count()
2911                        : mCo64TableEntries->count());
2912
2913            if (count == 0) {
2914                addChunkOffset(offset);
2915            }
2916            copy->release();
2917            copy = NULL;
2918            continue;
2919        }
2920
2921        mChunkSamples.push_back(copy);
2922        if (interleaveDurationUs == 0) {
2923            addOneStscTableEntry(++nChunks, 1);
2924            bufferChunk(timestampUs);
2925        } else {
2926            if (chunkTimestampUs == 0) {
2927                chunkTimestampUs = timestampUs;
2928            } else {
2929                int64_t chunkDurationUs = timestampUs - chunkTimestampUs;
2930                if (chunkDurationUs > interleaveDurationUs) {
2931                    if (chunkDurationUs > mMaxChunkDurationUs) {
2932                        mMaxChunkDurationUs = chunkDurationUs;
2933                    }
2934                    ++nChunks;
2935                    if (nChunks == 1 ||  // First chunk
2936                        lastSamplesPerChunk != mChunkSamples.size()) {
2937                        lastSamplesPerChunk = mChunkSamples.size();
2938                        addOneStscTableEntry(nChunks, lastSamplesPerChunk);
2939                    }
2940                    bufferChunk(timestampUs);
2941                    chunkTimestampUs = timestampUs;
2942                }
2943            }
2944        }
2945
2946    }
2947
2948    if (isTrackMalFormed()) {
2949        dumpTimeStamps();
2950        err = ERROR_MALFORMED;
2951    }
2952
2953    mOwner->trackProgressStatus(mTrackId, -1, err);
2954
2955    // Last chunk
2956    if (!hasMultipleTracks) {
2957        addOneStscTableEntry(1, mStszTableEntries->count());
2958    } else if (!mChunkSamples.empty()) {
2959        addOneStscTableEntry(++nChunks, mChunkSamples.size());
2960        bufferChunk(timestampUs);
2961    }
2962
2963    // We don't really know how long the last frame lasts, since
2964    // there is no frame time after it, just repeat the previous
2965    // frame's duration.
2966    if (mStszTableEntries->count() == 1) {
2967        lastDurationUs = 0;  // A single sample's duration
2968        lastDurationTicks = 0;
2969    } else {
2970        ++sampleCount;  // Count for the last sample
2971    }
2972
2973    if (mStszTableEntries->count() <= 2) {
2974        addOneSttsTableEntry(1, lastDurationTicks);
2975        if (sampleCount - 1 > 0) {
2976            addOneSttsTableEntry(sampleCount - 1, lastDurationTicks);
2977        }
2978    } else {
2979        addOneSttsTableEntry(sampleCount, lastDurationTicks);
2980    }
2981
2982    // The last ctts box may not have been written yet, and this
2983    // is to make sure that we write out the last ctts box.
2984    if (currCttsOffsetTimeTicks == lastCttsOffsetTimeTicks) {
2985        if (cttsSampleCount > 0) {
2986            addOneCttsTableEntry(cttsSampleCount, lastCttsOffsetTimeTicks);
2987        }
2988    }
2989
2990    mTrackDurationUs += lastDurationUs;
2991    mReachedEOS = true;
2992
2993    sendTrackSummary(hasMultipleTracks);
2994
2995    ALOGI("Received total/0-length (%d/%d) buffers and encoded %d frames. - %s",
2996            count, nZeroLengthFrames, mStszTableEntries->count(), trackName);
2997    if (mIsAudio) {
2998        ALOGI("Audio track drift time: %" PRId64 " us", mOwner->getDriftTimeUs());
2999    }
3000
3001    if (err == ERROR_END_OF_STREAM) {
3002        return OK;
3003    }
3004    return err;
3005}
3006
3007bool MPEG4Writer::Track::isTrackMalFormed() const {
3008    if (mIsMalformed) {
3009        return true;
3010    }
3011
3012    if (mStszTableEntries->count() == 0) {                      // no samples written
3013        ALOGE("The number of recorded samples is 0");
3014        return true;
3015    }
3016
3017    if (mIsVideo && mStssTableEntries->count() == 0) {  // no sync frames for video
3018        ALOGE("There are no sync frames for video track");
3019        return true;
3020    }
3021
3022    if (OK != checkCodecSpecificData()) {         // no codec specific data
3023        return true;
3024    }
3025
3026    return false;
3027}
3028
3029void MPEG4Writer::Track::sendTrackSummary(bool hasMultipleTracks) {
3030
3031    // Send track summary only if test mode is enabled.
3032    if (!isTestModeEnabled()) {
3033        return;
3034    }
3035
3036    int trackNum = (mTrackId << 28);
3037
3038    mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO,
3039                    trackNum | MEDIA_RECORDER_TRACK_INFO_TYPE,
3040                    mIsAudio ? 0: 1);
3041
3042    mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO,
3043                    trackNum | MEDIA_RECORDER_TRACK_INFO_DURATION_MS,
3044                    mTrackDurationUs / 1000);
3045
3046    mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO,
3047                    trackNum | MEDIA_RECORDER_TRACK_INFO_ENCODED_FRAMES,
3048                    mStszTableEntries->count());
3049
3050    {
3051        // The system delay time excluding the requested initial delay that
3052        // is used to eliminate the recording sound.
3053        int64_t startTimeOffsetUs = mOwner->getStartTimeOffsetMs() * 1000LL;
3054        if (startTimeOffsetUs < 0) {  // Start time offset was not set
3055            startTimeOffsetUs = kInitialDelayTimeUs;
3056        }
3057        int64_t initialDelayUs =
3058            mFirstSampleTimeRealUs - mStartTimeRealUs - startTimeOffsetUs;
3059
3060        mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO,
3061                    trackNum | MEDIA_RECORDER_TRACK_INFO_INITIAL_DELAY_MS,
3062                    (initialDelayUs) / 1000);
3063    }
3064
3065    mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO,
3066                    trackNum | MEDIA_RECORDER_TRACK_INFO_DATA_KBYTES,
3067                    mMdatSizeBytes / 1024);
3068
3069    if (hasMultipleTracks) {
3070        mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO,
3071                    trackNum | MEDIA_RECORDER_TRACK_INFO_MAX_CHUNK_DUR_MS,
3072                    mMaxChunkDurationUs / 1000);
3073
3074        int64_t moovStartTimeUs = mOwner->getStartTimestampUs();
3075        if (mStartTimestampUs != moovStartTimeUs) {
3076            int64_t startTimeOffsetUs = mStartTimestampUs - moovStartTimeUs;
3077            mOwner->notify(MEDIA_RECORDER_TRACK_EVENT_INFO,
3078                    trackNum | MEDIA_RECORDER_TRACK_INFO_START_OFFSET_MS,
3079                    startTimeOffsetUs / 1000);
3080        }
3081    }
3082}
3083
3084void MPEG4Writer::Track::trackProgressStatus(int64_t timeUs, status_t err) {
3085    ALOGV("trackProgressStatus: %" PRId64 " us", timeUs);
3086
3087    if (mTrackEveryTimeDurationUs > 0 &&
3088        timeUs - mPreviousTrackTimeUs >= mTrackEveryTimeDurationUs) {
3089        ALOGV("Fire time tracking progress status at %" PRId64 " us", timeUs);
3090        mOwner->trackProgressStatus(mTrackId, timeUs - mPreviousTrackTimeUs, err);
3091        mPreviousTrackTimeUs = timeUs;
3092    }
3093}
3094
3095void MPEG4Writer::trackProgressStatus(
3096        size_t trackId, int64_t timeUs, status_t err) {
3097    Mutex::Autolock lock(mLock);
3098    int32_t trackNum = (trackId << 28);
3099
3100    // Error notification
3101    // Do not consider ERROR_END_OF_STREAM an error
3102    if (err != OK && err != ERROR_END_OF_STREAM) {
3103        notify(MEDIA_RECORDER_TRACK_EVENT_ERROR,
3104               trackNum | MEDIA_RECORDER_TRACK_ERROR_GENERAL,
3105               err);
3106        return;
3107    }
3108
3109    if (timeUs == -1) {
3110        // Send completion notification
3111        notify(MEDIA_RECORDER_TRACK_EVENT_INFO,
3112               trackNum | MEDIA_RECORDER_TRACK_INFO_COMPLETION_STATUS,
3113               err);
3114    } else {
3115        // Send progress status
3116        notify(MEDIA_RECORDER_TRACK_EVENT_INFO,
3117               trackNum | MEDIA_RECORDER_TRACK_INFO_PROGRESS_IN_TIME,
3118               timeUs / 1000);
3119    }
3120}
3121
3122void MPEG4Writer::setDriftTimeUs(int64_t driftTimeUs) {
3123    ALOGV("setDriftTimeUs: %" PRId64 " us", driftTimeUs);
3124    Mutex::Autolock autolock(mLock);
3125    mDriftTimeUs = driftTimeUs;
3126}
3127
3128int64_t MPEG4Writer::getDriftTimeUs() {
3129    ALOGV("getDriftTimeUs: %" PRId64 " us", mDriftTimeUs);
3130    Mutex::Autolock autolock(mLock);
3131    return mDriftTimeUs;
3132}
3133
3134bool MPEG4Writer::isRealTimeRecording() const {
3135    return mIsRealTimeRecording;
3136}
3137
3138bool MPEG4Writer::useNalLengthFour() {
3139    return mUse4ByteNalLength;
3140}
3141
3142void MPEG4Writer::Track::bufferChunk(int64_t timestampUs) {
3143    ALOGV("bufferChunk");
3144
3145    Chunk chunk(this, timestampUs, mChunkSamples);
3146    mOwner->bufferChunk(chunk);
3147    mChunkSamples.clear();
3148}
3149
3150int64_t MPEG4Writer::Track::getDurationUs() const {
3151    return mTrackDurationUs;
3152}
3153
3154int64_t MPEG4Writer::Track::getEstimatedTrackSizeBytes() const {
3155    return mEstimatedTrackSizeBytes;
3156}
3157
3158status_t MPEG4Writer::Track::checkCodecSpecificData() const {
3159    const char *mime;
3160    CHECK(mMeta->findCString(kKeyMIMEType, &mime));
3161    if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime) ||
3162        !strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime) ||
3163        !strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime) ||
3164        !strcasecmp(MEDIA_MIMETYPE_VIDEO_HEVC, mime)) {
3165        if (!mCodecSpecificData ||
3166            mCodecSpecificDataSize <= 0) {
3167            ALOGE("Missing codec specific data");
3168            return ERROR_MALFORMED;
3169        }
3170    } else {
3171        if (mCodecSpecificData ||
3172            mCodecSpecificDataSize > 0) {
3173            ALOGE("Unexepected codec specific data found");
3174            return ERROR_MALFORMED;
3175        }
3176    }
3177    return OK;
3178}
3179
3180const char *MPEG4Writer::Track::getTrackType() const {
3181    return mIsAudio ? "Audio" : (mIsVideo ? "Video" : "Metadata");
3182}
3183
3184void MPEG4Writer::Track::writeTrackHeader(bool use32BitOffset) {
3185    uint32_t now = getMpeg4Time();
3186    mOwner->beginBox("trak");
3187        writeTkhdBox(now);
3188        mOwner->beginBox("mdia");
3189            writeMdhdBox(now);
3190            writeHdlrBox();
3191            mOwner->beginBox("minf");
3192                if (mIsAudio) {
3193                    writeSmhdBox();
3194                } else if (mIsVideo) {
3195                    writeVmhdBox();
3196                } else {
3197                    writeNmhdBox();
3198                }
3199                writeDinfBox();
3200                writeStblBox(use32BitOffset);
3201            mOwner->endBox();  // minf
3202        mOwner->endBox();  // mdia
3203    mOwner->endBox();  // trak
3204}
3205
3206void MPEG4Writer::Track::writeStblBox(bool use32BitOffset) {
3207    mOwner->beginBox("stbl");
3208    mOwner->beginBox("stsd");
3209    mOwner->writeInt32(0);               // version=0, flags=0
3210    mOwner->writeInt32(1);               // entry count
3211    if (mIsAudio) {
3212        writeAudioFourCCBox();
3213    } else if (mIsVideo) {
3214        writeVideoFourCCBox();
3215    } else {
3216        writeMetadataFourCCBox();
3217    }
3218    mOwner->endBox();  // stsd
3219    writeSttsBox();
3220    if (mIsVideo) {
3221        writeCttsBox();
3222        writeStssBox();
3223    }
3224    writeStszBox();
3225    writeStscBox();
3226    writeStcoBox(use32BitOffset);
3227    mOwner->endBox();  // stbl
3228}
3229
3230void MPEG4Writer::Track::writeMetadataFourCCBox() {
3231    const char *mime;
3232    bool success = mMeta->findCString(kKeyMIMEType, &mime);
3233    CHECK(success);
3234    const char *fourcc = getFourCCForMime(mime);
3235    if (fourcc == NULL) {
3236        ALOGE("Unknown mime type '%s'.", mime);
3237        TRESPASS();
3238    }
3239    mOwner->beginBox(fourcc);    // TextMetaDataSampleEntry
3240    mOwner->writeCString(mime);  // metadata mime_format
3241    mOwner->endBox(); // mett
3242}
3243
3244void MPEG4Writer::Track::writeVideoFourCCBox() {
3245    const char *mime;
3246    bool success = mMeta->findCString(kKeyMIMEType, &mime);
3247    CHECK(success);
3248    const char *fourcc = getFourCCForMime(mime);
3249    if (fourcc == NULL) {
3250        ALOGE("Unknown mime type '%s'.", mime);
3251        TRESPASS();
3252    }
3253
3254    mOwner->beginBox(fourcc);        // video format
3255    mOwner->writeInt32(0);           // reserved
3256    mOwner->writeInt16(0);           // reserved
3257    mOwner->writeInt16(1);           // data ref index
3258    mOwner->writeInt16(0);           // predefined
3259    mOwner->writeInt16(0);           // reserved
3260    mOwner->writeInt32(0);           // predefined
3261    mOwner->writeInt32(0);           // predefined
3262    mOwner->writeInt32(0);           // predefined
3263
3264    int32_t width, height;
3265    success = mMeta->findInt32(kKeyWidth, &width);
3266    success = success && mMeta->findInt32(kKeyHeight, &height);
3267    CHECK(success);
3268
3269    mOwner->writeInt16(width);
3270    mOwner->writeInt16(height);
3271    mOwner->writeInt32(0x480000);    // horiz resolution
3272    mOwner->writeInt32(0x480000);    // vert resolution
3273    mOwner->writeInt32(0);           // reserved
3274    mOwner->writeInt16(1);           // frame count
3275    mOwner->writeInt8(0);            // compressor string length
3276    mOwner->write("                               ", 31);
3277    mOwner->writeInt16(0x18);        // depth
3278    mOwner->writeInt16(-1);          // predefined
3279
3280    if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_MPEG4, mime)) {
3281        writeMp4vEsdsBox();
3282    } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_H263, mime)) {
3283        writeD263Box();
3284    } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_AVC, mime)) {
3285        writeAvccBox();
3286    } else if (!strcasecmp(MEDIA_MIMETYPE_VIDEO_HEVC, mime)) {
3287        writeHvccBox();
3288    }
3289
3290    writePaspBox();
3291    writeColrBox();
3292    mOwner->endBox();  // mp4v, s263 or avc1
3293}
3294
3295void MPEG4Writer::Track::writeColrBox() {
3296    ColorAspects aspects;
3297    memset(&aspects, 0, sizeof(aspects));
3298    // TRICKY: using | instead of || because we want to execute all findInt32-s
3299    if (mMeta->findInt32(kKeyColorPrimaries, (int32_t*)&aspects.mPrimaries)
3300            | mMeta->findInt32(kKeyTransferFunction, (int32_t*)&aspects.mTransfer)
3301            | mMeta->findInt32(kKeyColorMatrix, (int32_t*)&aspects.mMatrixCoeffs)
3302            | mMeta->findInt32(kKeyColorRange, (int32_t*)&aspects.mRange)) {
3303        int32_t primaries, transfer, coeffs;
3304        bool fullRange;
3305        ColorUtils::convertCodecColorAspectsToIsoAspects(
3306                aspects, &primaries, &transfer, &coeffs, &fullRange);
3307        mOwner->beginBox("colr");
3308        mOwner->writeFourcc("nclx");
3309        mOwner->writeInt16(primaries);
3310        mOwner->writeInt16(transfer);
3311        mOwner->writeInt16(coeffs);
3312        mOwner->writeInt8(int8_t(fullRange ? 0x80 : 0x0));
3313        mOwner->endBox(); // colr
3314    }
3315}
3316
3317void MPEG4Writer::Track::writeAudioFourCCBox() {
3318    const char *mime;
3319    bool success = mMeta->findCString(kKeyMIMEType, &mime);
3320    CHECK(success);
3321    const char *fourcc = getFourCCForMime(mime);
3322    if (fourcc == NULL) {
3323        ALOGE("Unknown mime type '%s'.", mime);
3324        TRESPASS();
3325    }
3326
3327    mOwner->beginBox(fourcc);        // audio format
3328    mOwner->writeInt32(0);           // reserved
3329    mOwner->writeInt16(0);           // reserved
3330    mOwner->writeInt16(0x1);         // data ref index
3331    mOwner->writeInt32(0);           // reserved
3332    mOwner->writeInt32(0);           // reserved
3333    int32_t nChannels;
3334    CHECK_EQ(true, mMeta->findInt32(kKeyChannelCount, &nChannels));
3335    mOwner->writeInt16(nChannels);   // channel count
3336    mOwner->writeInt16(16);          // sample size
3337    mOwner->writeInt16(0);           // predefined
3338    mOwner->writeInt16(0);           // reserved
3339
3340    int32_t samplerate;
3341    success = mMeta->findInt32(kKeySampleRate, &samplerate);
3342    CHECK(success);
3343    mOwner->writeInt32(samplerate << 16);
3344    if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AAC, mime)) {
3345        writeMp4aEsdsBox();
3346    } else if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_NB, mime) ||
3347               !strcasecmp(MEDIA_MIMETYPE_AUDIO_AMR_WB, mime)) {
3348        writeDamrBox();
3349    }
3350    mOwner->endBox();
3351}
3352
3353void MPEG4Writer::Track::writeMp4aEsdsBox() {
3354    mOwner->beginBox("esds");
3355    CHECK(mCodecSpecificData);
3356    CHECK_GT(mCodecSpecificDataSize, 0);
3357
3358    // Make sure all sizes encode to a single byte.
3359    CHECK_LT(mCodecSpecificDataSize + 23, 128);
3360
3361    mOwner->writeInt32(0);     // version=0, flags=0
3362    mOwner->writeInt8(0x03);   // ES_DescrTag
3363    mOwner->writeInt8(23 + mCodecSpecificDataSize);
3364    mOwner->writeInt16(0x0000);// ES_ID
3365    mOwner->writeInt8(0x00);
3366
3367    mOwner->writeInt8(0x04);   // DecoderConfigDescrTag
3368    mOwner->writeInt8(15 + mCodecSpecificDataSize);
3369    mOwner->writeInt8(0x40);   // objectTypeIndication ISO/IEC 14492-2
3370    mOwner->writeInt8(0x15);   // streamType AudioStream
3371
3372    mOwner->writeInt16(0x03);  // XXX
3373    mOwner->writeInt8(0x00);   // buffer size 24-bit (0x300)
3374
3375    int32_t avgBitrate = 0;
3376    (void)mMeta->findInt32(kKeyBitRate, &avgBitrate);
3377    int32_t maxBitrate = 0;
3378    (void)mMeta->findInt32(kKeyMaxBitRate, &maxBitrate);
3379    mOwner->writeInt32(maxBitrate);
3380    mOwner->writeInt32(avgBitrate);
3381
3382    mOwner->writeInt8(0x05);   // DecoderSpecificInfoTag
3383    mOwner->writeInt8(mCodecSpecificDataSize);
3384    mOwner->write(mCodecSpecificData, mCodecSpecificDataSize);
3385
3386    static const uint8_t kData2[] = {
3387        0x06,  // SLConfigDescriptorTag
3388        0x01,
3389        0x02
3390    };
3391    mOwner->write(kData2, sizeof(kData2));
3392
3393    mOwner->endBox();  // esds
3394}
3395
3396void MPEG4Writer::Track::writeMp4vEsdsBox() {
3397    CHECK(mCodecSpecificData);
3398    CHECK_GT(mCodecSpecificDataSize, 0);
3399
3400    // Make sure all sizes encode to a single byte.
3401    CHECK_LT(23 + mCodecSpecificDataSize, 128);
3402
3403    mOwner->beginBox("esds");
3404
3405    mOwner->writeInt32(0);    // version=0, flags=0
3406
3407    mOwner->writeInt8(0x03);  // ES_DescrTag
3408    mOwner->writeInt8(23 + mCodecSpecificDataSize);
3409    mOwner->writeInt16(0x0000);  // ES_ID
3410    mOwner->writeInt8(0x1f);
3411
3412    mOwner->writeInt8(0x04);  // DecoderConfigDescrTag
3413    mOwner->writeInt8(15 + mCodecSpecificDataSize);
3414    mOwner->writeInt8(0x20);  // objectTypeIndication ISO/IEC 14492-2
3415    mOwner->writeInt8(0x11);  // streamType VisualStream
3416
3417    static const uint8_t kData[] = {
3418        0x01, 0x77, 0x00, // buffer size 96000 bytes
3419    };
3420    mOwner->write(kData, sizeof(kData));
3421
3422    int32_t avgBitrate = 0;
3423    (void)mMeta->findInt32(kKeyBitRate, &avgBitrate);
3424    int32_t maxBitrate = 0;
3425    (void)mMeta->findInt32(kKeyMaxBitRate, &maxBitrate);
3426    mOwner->writeInt32(maxBitrate);
3427    mOwner->writeInt32(avgBitrate);
3428
3429    mOwner->writeInt8(0x05);  // DecoderSpecificInfoTag
3430
3431    mOwner->writeInt8(mCodecSpecificDataSize);
3432    mOwner->write(mCodecSpecificData, mCodecSpecificDataSize);
3433
3434    static const uint8_t kData2[] = {
3435        0x06,  // SLConfigDescriptorTag
3436        0x01,
3437        0x02
3438    };
3439    mOwner->write(kData2, sizeof(kData2));
3440
3441    mOwner->endBox();  // esds
3442}
3443
3444void MPEG4Writer::Track::writeTkhdBox(uint32_t now) {
3445    mOwner->beginBox("tkhd");
3446    // Flags = 7 to indicate that the track is enabled, and
3447    // part of the presentation
3448    mOwner->writeInt32(0x07);          // version=0, flags=7
3449    mOwner->writeInt32(now);           // creation time
3450    mOwner->writeInt32(now);           // modification time
3451    mOwner->writeInt32(mTrackId);      // track id starts with 1
3452    mOwner->writeInt32(0);             // reserved
3453    int64_t trakDurationUs = getDurationUs();
3454    int32_t mvhdTimeScale = mOwner->getTimeScale();
3455    int32_t tkhdDuration =
3456        (trakDurationUs * mvhdTimeScale + 5E5) / 1E6;
3457    mOwner->writeInt32(tkhdDuration);  // in mvhd timescale
3458    mOwner->writeInt32(0);             // reserved
3459    mOwner->writeInt32(0);             // reserved
3460    mOwner->writeInt16(0);             // layer
3461    mOwner->writeInt16(0);             // alternate group
3462    mOwner->writeInt16(mIsAudio ? 0x100 : 0);  // volume
3463    mOwner->writeInt16(0);             // reserved
3464
3465    mOwner->writeCompositionMatrix(mRotation);       // matrix
3466
3467    if (!mIsVideo) {
3468        mOwner->writeInt32(0);
3469        mOwner->writeInt32(0);
3470    } else {
3471        int32_t width, height;
3472        bool success = mMeta->findInt32(kKeyDisplayWidth, &width);
3473        success = success && mMeta->findInt32(kKeyDisplayHeight, &height);
3474
3475        // Use width/height if display width/height are not present.
3476        if (!success) {
3477            success = mMeta->findInt32(kKeyWidth, &width);
3478            success = success && mMeta->findInt32(kKeyHeight, &height);
3479        }
3480        CHECK(success);
3481
3482        mOwner->writeInt32(width << 16);   // 32-bit fixed-point value
3483        mOwner->writeInt32(height << 16);  // 32-bit fixed-point value
3484    }
3485    mOwner->endBox();  // tkhd
3486}
3487
3488void MPEG4Writer::Track::writeVmhdBox() {
3489    mOwner->beginBox("vmhd");
3490    mOwner->writeInt32(0x01);        // version=0, flags=1
3491    mOwner->writeInt16(0);           // graphics mode
3492    mOwner->writeInt16(0);           // opcolor
3493    mOwner->writeInt16(0);
3494    mOwner->writeInt16(0);
3495    mOwner->endBox();
3496}
3497
3498void MPEG4Writer::Track::writeSmhdBox() {
3499    mOwner->beginBox("smhd");
3500    mOwner->writeInt32(0);           // version=0, flags=0
3501    mOwner->writeInt16(0);           // balance
3502    mOwner->writeInt16(0);           // reserved
3503    mOwner->endBox();
3504}
3505
3506void MPEG4Writer::Track::writeNmhdBox() {
3507    mOwner->beginBox("nmhd");
3508    mOwner->writeInt32(0);           // version=0, flags=0
3509    mOwner->endBox();
3510}
3511
3512void MPEG4Writer::Track::writeHdlrBox() {
3513    mOwner->beginBox("hdlr");
3514    mOwner->writeInt32(0);             // version=0, flags=0
3515    mOwner->writeInt32(0);             // component type: should be mhlr
3516    mOwner->writeFourcc(mIsAudio ? "soun" : (mIsVideo ? "vide" : "meta"));  // component subtype
3517    mOwner->writeInt32(0);             // reserved
3518    mOwner->writeInt32(0);             // reserved
3519    mOwner->writeInt32(0);             // reserved
3520    // Removing "r" for the name string just makes the string 4 byte aligned
3521    mOwner->writeCString(mIsAudio ? "SoundHandle": (mIsVideo ? "VideoHandle" : "MetadHandle"));
3522    mOwner->endBox();
3523}
3524
3525void MPEG4Writer::Track::writeMdhdBox(uint32_t now) {
3526    int64_t trakDurationUs = getDurationUs();
3527    int64_t mdhdDuration = (trakDurationUs * mTimeScale + 5E5) / 1E6;
3528    mOwner->beginBox("mdhd");
3529
3530    if (mdhdDuration > UINT32_MAX) {
3531        mOwner->writeInt32((1 << 24));            // version=1, flags=0
3532        mOwner->writeInt64((int64_t)now);         // creation time
3533        mOwner->writeInt64((int64_t)now);         // modification time
3534        mOwner->writeInt32(mTimeScale);           // media timescale
3535        mOwner->writeInt64(mdhdDuration);         // media timescale
3536    } else {
3537        mOwner->writeInt32(0);                      // version=0, flags=0
3538        mOwner->writeInt32(now);                    // creation time
3539        mOwner->writeInt32(now);                    // modification time
3540        mOwner->writeInt32(mTimeScale);             // media timescale
3541        mOwner->writeInt32((int32_t)mdhdDuration);  // use media timescale
3542    }
3543    // Language follows the three letter standard ISO-639-2/T
3544    // 'e', 'n', 'g' for "English", for instance.
3545    // Each character is packed as the difference between its ASCII value and 0x60.
3546    // For "English", these are 00101, 01110, 00111.
3547    // XXX: Where is the padding bit located: 0x15C7?
3548    const char *lang = NULL;
3549    int16_t langCode = 0;
3550    if (mMeta->findCString(kKeyMediaLanguage, &lang) && lang && strnlen(lang, 3) > 2) {
3551        langCode = ((lang[0] & 0x1f) << 10) | ((lang[1] & 0x1f) << 5) | (lang[2] & 0x1f);
3552    }
3553    mOwner->writeInt16(langCode);      // language code
3554    mOwner->writeInt16(0);             // predefined
3555    mOwner->endBox();
3556}
3557
3558void MPEG4Writer::Track::writeDamrBox() {
3559    // 3gpp2 Spec AMRSampleEntry fields
3560    mOwner->beginBox("damr");
3561    mOwner->writeCString("   ");  // vendor: 4 bytes
3562    mOwner->writeInt8(0);         // decoder version
3563    mOwner->writeInt16(0x83FF);   // mode set: all enabled
3564    mOwner->writeInt8(0);         // mode change period
3565    mOwner->writeInt8(1);         // frames per sample
3566    mOwner->endBox();
3567}
3568
3569void MPEG4Writer::Track::writeUrlBox() {
3570    // The table index here refers to the sample description index
3571    // in the sample table entries.
3572    mOwner->beginBox("url ");
3573    mOwner->writeInt32(1);  // version=0, flags=1 (self-contained)
3574    mOwner->endBox();  // url
3575}
3576
3577void MPEG4Writer::Track::writeDrefBox() {
3578    mOwner->beginBox("dref");
3579    mOwner->writeInt32(0);  // version=0, flags=0
3580    mOwner->writeInt32(1);  // entry count (either url or urn)
3581    writeUrlBox();
3582    mOwner->endBox();  // dref
3583}
3584
3585void MPEG4Writer::Track::writeDinfBox() {
3586    mOwner->beginBox("dinf");
3587    writeDrefBox();
3588    mOwner->endBox();  // dinf
3589}
3590
3591void MPEG4Writer::Track::writeAvccBox() {
3592    CHECK(mCodecSpecificData);
3593    CHECK_GE(mCodecSpecificDataSize, 5);
3594
3595    // Patch avcc's lengthSize field to match the number
3596    // of bytes we use to indicate the size of a nal unit.
3597    uint8_t *ptr = (uint8_t *)mCodecSpecificData;
3598    ptr[4] = (ptr[4] & 0xfc) | (mOwner->useNalLengthFour() ? 3 : 1);
3599    mOwner->beginBox("avcC");
3600    mOwner->write(mCodecSpecificData, mCodecSpecificDataSize);
3601    mOwner->endBox();  // avcC
3602}
3603
3604
3605void MPEG4Writer::Track::writeHvccBox() {
3606    CHECK(mCodecSpecificData);
3607    CHECK_GE(mCodecSpecificDataSize, 5);
3608
3609    // Patch avcc's lengthSize field to match the number
3610    // of bytes we use to indicate the size of a nal unit.
3611    uint8_t *ptr = (uint8_t *)mCodecSpecificData;
3612    ptr[21] = (ptr[21] & 0xfc) | (mOwner->useNalLengthFour() ? 3 : 1);
3613    mOwner->beginBox("hvcC");
3614    mOwner->write(mCodecSpecificData, mCodecSpecificDataSize);
3615    mOwner->endBox();  // hvcC
3616}
3617
3618void MPEG4Writer::Track::writeD263Box() {
3619    mOwner->beginBox("d263");
3620    mOwner->writeInt32(0);  // vendor
3621    mOwner->writeInt8(0);   // decoder version
3622    mOwner->writeInt8(10);  // level: 10
3623    mOwner->writeInt8(0);   // profile: 0
3624    mOwner->endBox();  // d263
3625}
3626
3627// This is useful if the pixel is not square
3628void MPEG4Writer::Track::writePaspBox() {
3629    mOwner->beginBox("pasp");
3630    mOwner->writeInt32(1 << 16);  // hspacing
3631    mOwner->writeInt32(1 << 16);  // vspacing
3632    mOwner->endBox();  // pasp
3633}
3634
3635int32_t MPEG4Writer::Track::getStartTimeOffsetScaledTime() const {
3636    int64_t trackStartTimeOffsetUs = 0;
3637    int64_t moovStartTimeUs = mOwner->getStartTimestampUs();
3638    if (mStartTimestampUs != moovStartTimeUs) {
3639        CHECK_GT(mStartTimestampUs, moovStartTimeUs);
3640        trackStartTimeOffsetUs = mStartTimestampUs - moovStartTimeUs;
3641    }
3642    return (trackStartTimeOffsetUs *  mTimeScale + 500000LL) / 1000000LL;
3643}
3644
3645void MPEG4Writer::Track::writeSttsBox() {
3646    mOwner->beginBox("stts");
3647    mOwner->writeInt32(0);  // version=0, flags=0
3648    uint32_t duration;
3649    CHECK(mSttsTableEntries->get(duration, 1));
3650    duration = htonl(duration);  // Back to host byte order
3651    mSttsTableEntries->set(htonl(duration + getStartTimeOffsetScaledTime()), 1);
3652    mSttsTableEntries->write(mOwner);
3653    mOwner->endBox();  // stts
3654}
3655
3656void MPEG4Writer::Track::writeCttsBox() {
3657    // There is no B frame at all
3658    if (mMinCttsOffsetTimeUs == mMaxCttsOffsetTimeUs) {
3659        return;
3660    }
3661
3662    // Do not write ctts box when there is no need to have it.
3663    if (mCttsTableEntries->count() == 0) {
3664        return;
3665    }
3666
3667    ALOGV("ctts box has %d entries with range [%" PRId64 ", %" PRId64 "]",
3668            mCttsTableEntries->count(), mMinCttsOffsetTimeUs, mMaxCttsOffsetTimeUs);
3669
3670    mOwner->beginBox("ctts");
3671    mOwner->writeInt32(0);  // version=0, flags=0
3672    uint32_t delta = mMinCttsOffsetTimeUs - getStartTimeOffsetScaledTime();
3673    mCttsTableEntries->adjustEntries([delta](size_t /* ix */, uint32_t (&value)[2]) {
3674        // entries are <count, ctts> pairs; adjust only ctts
3675        uint32_t duration = htonl(value[1]); // back to host byte order
3676        value[1] = htonl(duration - delta);
3677    });
3678    mCttsTableEntries->write(mOwner);
3679    mOwner->endBox();  // ctts
3680}
3681
3682void MPEG4Writer::Track::writeStssBox() {
3683    mOwner->beginBox("stss");
3684    mOwner->writeInt32(0);  // version=0, flags=0
3685    mStssTableEntries->write(mOwner);
3686    mOwner->endBox();  // stss
3687}
3688
3689void MPEG4Writer::Track::writeStszBox() {
3690    mOwner->beginBox("stsz");
3691    mOwner->writeInt32(0);  // version=0, flags=0
3692    mOwner->writeInt32(0);
3693    mStszTableEntries->write(mOwner);
3694    mOwner->endBox();  // stsz
3695}
3696
3697void MPEG4Writer::Track::writeStscBox() {
3698    mOwner->beginBox("stsc");
3699    mOwner->writeInt32(0);  // version=0, flags=0
3700    mStscTableEntries->write(mOwner);
3701    mOwner->endBox();  // stsc
3702}
3703
3704void MPEG4Writer::Track::writeStcoBox(bool use32BitOffset) {
3705    mOwner->beginBox(use32BitOffset? "stco": "co64");
3706    mOwner->writeInt32(0);  // version=0, flags=0
3707    if (use32BitOffset) {
3708        mStcoTableEntries->write(mOwner);
3709    } else {
3710        mCo64TableEntries->write(mOwner);
3711    }
3712    mOwner->endBox();  // stco or co64
3713}
3714
3715void MPEG4Writer::writeUdtaBox() {
3716    beginBox("udta");
3717    writeGeoDataBox();
3718    endBox();
3719}
3720
3721void MPEG4Writer::writeHdlr() {
3722    beginBox("hdlr");
3723    writeInt32(0); // Version, Flags
3724    writeInt32(0); // Predefined
3725    writeFourcc("mdta");
3726    writeInt32(0); // Reserved[0]
3727    writeInt32(0); // Reserved[1]
3728    writeInt32(0); // Reserved[2]
3729    writeInt8(0);  // Name (empty)
3730    endBox();
3731}
3732
3733void MPEG4Writer::writeKeys() {
3734    size_t count = mMetaKeys->countEntries();
3735
3736    beginBox("keys");
3737    writeInt32(0);     // Version, Flags
3738    writeInt32(count); // Entry_count
3739    for (size_t i = 0; i < count; i++) {
3740        AMessage::Type type;
3741        const char *key = mMetaKeys->getEntryNameAt(i, &type);
3742        size_t n = strlen(key);
3743        writeInt32(n + 8);
3744        writeFourcc("mdta");
3745        write(key, n); // write without the \0
3746    }
3747    endBox();
3748}
3749
3750void MPEG4Writer::writeIlst() {
3751    size_t count = mMetaKeys->countEntries();
3752
3753    beginBox("ilst");
3754    for (size_t i = 0; i < count; i++) {
3755        beginBox(i + 1); // key id (1-based)
3756        beginBox("data");
3757        AMessage::Type type;
3758        const char *key = mMetaKeys->getEntryNameAt(i, &type);
3759        switch (type) {
3760            case AMessage::kTypeString:
3761            {
3762                AString val;
3763                CHECK(mMetaKeys->findString(key, &val));
3764                writeInt32(1); // type = UTF8
3765                writeInt32(0); // default country/language
3766                write(val.c_str(), strlen(val.c_str())); // write without \0
3767                break;
3768            }
3769
3770            case AMessage::kTypeFloat:
3771            {
3772                float val;
3773                CHECK(mMetaKeys->findFloat(key, &val));
3774                writeInt32(23); // type = float32
3775                writeInt32(0);  // default country/language
3776                writeInt32(*reinterpret_cast<int32_t *>(&val));
3777                break;
3778            }
3779
3780            case AMessage::kTypeInt32:
3781            {
3782                int32_t val;
3783                CHECK(mMetaKeys->findInt32(key, &val));
3784                writeInt32(67); // type = signed int32
3785                writeInt32(0);  // default country/language
3786                writeInt32(val);
3787                break;
3788            }
3789
3790            default:
3791            {
3792                ALOGW("Unsupported key type, writing 0 instead");
3793                writeInt32(77); // type = unsigned int32
3794                writeInt32(0);  // default country/language
3795                writeInt32(0);
3796                break;
3797            }
3798        }
3799        endBox(); // data
3800        endBox(); // key id
3801    }
3802    endBox(); // ilst
3803}
3804
3805void MPEG4Writer::writeMetaBox() {
3806    size_t count = mMetaKeys->countEntries();
3807    if (count == 0) {
3808        return;
3809    }
3810
3811    beginBox("meta");
3812    writeHdlr();
3813    writeKeys();
3814    writeIlst();
3815    endBox();
3816}
3817
3818/*
3819 * Geodata is stored according to ISO-6709 standard.
3820 */
3821void MPEG4Writer::writeGeoDataBox() {
3822    beginBox("\xA9xyz");
3823    /*
3824     * For historical reasons, any user data start
3825     * with "\0xA9", must be followed by its assoicated
3826     * language code.
3827     * 0x0012: text string length
3828     * 0x15c7: lang (locale) code: en
3829     */
3830    writeInt32(0x001215c7);
3831    writeLatitude(mLatitudex10000);
3832    writeLongitude(mLongitudex10000);
3833    writeInt8(0x2F);
3834    endBox();
3835}
3836
3837}  // namespace android
3838