NuMediaExtractor.cpp revision fd7ec80f3d0e30c8df61b86951d926ab9c8c6d25 
1/*
2 * Copyright 2012, 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 "NuMediaExtractor"
19#include <utils/Log.h>
20
21#include <media/stagefright/NuMediaExtractor.h>
22
23#include "include/ESDS.h"
24#include "include/NuCachedSource2.h"
25#include "include/WVMExtractor.h"
26
27#include <media/stagefright/foundation/ABuffer.h>
28#include <media/stagefright/foundation/ADebug.h>
29#include <media/stagefright/foundation/AMessage.h>
30#include <media/stagefright/DataSource.h>
31#include <media/stagefright/FileSource.h>
32#include <media/stagefright/MediaBuffer.h>
33#include <media/stagefright/MediaDefs.h>
34#include <media/stagefright/MediaErrors.h>
35#include <media/stagefright/MediaExtractor.h>
36#include <media/stagefright/MediaSource.h>
37#include <media/stagefright/MetaData.h>
38#include <media/stagefright/Utils.h>
39
40namespace android {
41
42NuMediaExtractor::NuMediaExtractor()
43    : mIsWidevineExtractor(false),
44      mTotalBitrate(-1ll),
45      mDurationUs(-1ll) {
46}
47
48NuMediaExtractor::~NuMediaExtractor() {
49    releaseTrackSamples();
50
51    for (size_t i = 0; i < mSelectedTracks.size(); ++i) {
52        TrackInfo *info = &mSelectedTracks.editItemAt(i);
53
54        CHECK_EQ((status_t)OK, info->mSource->stop());
55    }
56
57    mSelectedTracks.clear();
58}
59
60status_t NuMediaExtractor::setDataSource(
61        const char *path, const KeyedVector<String8, String8> *headers) {
62    Mutex::Autolock autoLock(mLock);
63
64    if (mImpl != NULL) {
65        return -EINVAL;
66    }
67
68    sp<DataSource> dataSource =
69        DataSource::CreateFromURI(path, headers);
70
71    if (dataSource == NULL) {
72        return -ENOENT;
73    }
74
75    mIsWidevineExtractor = false;
76    if (!strncasecmp("widevine://", path, 11)) {
77        String8 mimeType;
78        float confidence;
79        sp<AMessage> dummy;
80        bool success = SniffWVM(dataSource, &mimeType, &confidence, &dummy);
81
82        if (!success
83                || strcasecmp(
84                    mimeType.string(), MEDIA_MIMETYPE_CONTAINER_WVM)) {
85            return ERROR_UNSUPPORTED;
86        }
87
88        sp<WVMExtractor> extractor = new WVMExtractor(dataSource);
89        extractor->setAdaptiveStreamingMode(true);
90
91        mImpl = extractor;
92        mIsWidevineExtractor = true;
93    } else {
94        mImpl = MediaExtractor::Create(dataSource);
95    }
96
97    if (mImpl == NULL) {
98        return ERROR_UNSUPPORTED;
99    }
100
101    sp<MetaData> fileMeta = mImpl->getMetaData();
102    const char *containerMime;
103    if (fileMeta != NULL
104            && fileMeta->findCString(kKeyMIMEType, &containerMime)
105            && !strcasecmp(containerMime, "video/wvm")) {
106        // We always want to use "cryptoPluginMode" when using the wvm
107        // extractor. We can tell that it is this extractor by looking
108        // at the container mime type.
109        // The cryptoPluginMode ensures that the extractor will actually
110        // give us data in a call to MediaSource::read(), unlike its
111        // default mode that we use from AwesomePlayer.
112        static_cast<WVMExtractor *>(mImpl.get())->setCryptoPluginMode(true);
113    } else if (mImpl->getDrmFlag()) {
114        // For all other drm content, we don't want to expose decrypted
115        // content to Java application.
116        mImpl.clear();
117        mImpl = NULL;
118        return ERROR_UNSUPPORTED;
119    }
120
121    mDataSource = dataSource;
122
123    updateDurationAndBitrate();
124
125    return OK;
126}
127
128status_t NuMediaExtractor::setDataSource(int fd, off64_t offset, off64_t size) {
129
130    Mutex::Autolock autoLock(mLock);
131
132    if (mImpl != NULL) {
133        return -EINVAL;
134    }
135
136    sp<FileSource> fileSource = new FileSource(dup(fd), offset, size);
137
138    status_t err = fileSource->initCheck();
139    if (err != OK) {
140        return err;
141    }
142
143    mImpl = MediaExtractor::Create(fileSource);
144
145    if (mImpl == NULL) {
146        return ERROR_UNSUPPORTED;
147    }
148
149    mDataSource = fileSource;
150
151    updateDurationAndBitrate();
152
153    return OK;
154}
155
156status_t NuMediaExtractor::setDataSource(const sp<DataSource> &source) {
157    Mutex::Autolock autoLock(mLock);
158
159    if (mImpl != NULL) {
160        return -EINVAL;
161    }
162
163    status_t err = source->initCheck();
164    if (err != OK) {
165        return err;
166    }
167
168    mImpl = MediaExtractor::Create(source);
169
170    if (mImpl == NULL) {
171        return ERROR_UNSUPPORTED;
172    }
173
174    mDataSource = source;
175
176    updateDurationAndBitrate();
177
178    return OK;
179}
180
181void NuMediaExtractor::updateDurationAndBitrate() {
182    mTotalBitrate = 0ll;
183    mDurationUs = -1ll;
184
185    for (size_t i = 0; i < mImpl->countTracks(); ++i) {
186        sp<MetaData> meta = mImpl->getTrackMetaData(i);
187
188        int32_t bitrate;
189        if (!meta->findInt32(kKeyBitRate, &bitrate)) {
190            const char *mime;
191            CHECK(meta->findCString(kKeyMIMEType, &mime));
192            ALOGV("track of type '%s' does not publish bitrate", mime);
193
194            mTotalBitrate = -1ll;
195        } else if (mTotalBitrate >= 0ll) {
196            mTotalBitrate += bitrate;
197        }
198
199        int64_t durationUs;
200        if (meta->findInt64(kKeyDuration, &durationUs)
201                && durationUs > mDurationUs) {
202            mDurationUs = durationUs;
203        }
204    }
205}
206
207size_t NuMediaExtractor::countTracks() const {
208    Mutex::Autolock autoLock(mLock);
209
210    return mImpl == NULL ? 0 : mImpl->countTracks();
211}
212
213status_t NuMediaExtractor::getTrackFormat(
214        size_t index, sp<AMessage> *format) const {
215    Mutex::Autolock autoLock(mLock);
216
217    *format = NULL;
218
219    if (mImpl == NULL) {
220        return -EINVAL;
221    }
222
223    if (index >= mImpl->countTracks()) {
224        return -ERANGE;
225    }
226
227    sp<MetaData> meta = mImpl->getTrackMetaData(index);
228    return convertMetaDataToMessage(meta, format);
229}
230
231status_t NuMediaExtractor::selectTrack(size_t index) {
232    Mutex::Autolock autoLock(mLock);
233
234    if (mImpl == NULL) {
235        return -EINVAL;
236    }
237
238    if (index >= mImpl->countTracks()) {
239        return -ERANGE;
240    }
241
242    for (size_t i = 0; i < mSelectedTracks.size(); ++i) {
243        TrackInfo *info = &mSelectedTracks.editItemAt(i);
244
245        if (info->mTrackIndex == index) {
246            // This track has already been selected.
247            return OK;
248        }
249    }
250
251    sp<MediaSource> source = mImpl->getTrack(index);
252
253    CHECK_EQ((status_t)OK, source->start());
254
255    mSelectedTracks.push();
256    TrackInfo *info = &mSelectedTracks.editItemAt(mSelectedTracks.size() - 1);
257
258    info->mSource = source;
259    info->mTrackIndex = index;
260    info->mFinalResult = OK;
261    info->mSample = NULL;
262    info->mSampleTimeUs = -1ll;
263    info->mTrackFlags = 0;
264
265    const char *mime;
266    CHECK(source->getFormat()->findCString(kKeyMIMEType, &mime));
267
268    if (!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_VORBIS)) {
269        info->mTrackFlags |= kIsVorbis;
270    }
271
272    return OK;
273}
274
275status_t NuMediaExtractor::unselectTrack(size_t index) {
276    Mutex::Autolock autoLock(mLock);
277
278    if (mImpl == NULL) {
279        return -EINVAL;
280    }
281
282    if (index >= mImpl->countTracks()) {
283        return -ERANGE;
284    }
285
286    size_t i;
287    for (i = 0; i < mSelectedTracks.size(); ++i) {
288        TrackInfo *info = &mSelectedTracks.editItemAt(i);
289
290        if (info->mTrackIndex == index) {
291            break;
292        }
293    }
294
295    if (i == mSelectedTracks.size()) {
296        // Not selected.
297        return OK;
298    }
299
300    TrackInfo *info = &mSelectedTracks.editItemAt(i);
301
302    if (info->mSample != NULL) {
303        info->mSample->release();
304        info->mSample = NULL;
305
306        info->mSampleTimeUs = -1ll;
307    }
308
309    CHECK_EQ((status_t)OK, info->mSource->stop());
310
311    mSelectedTracks.removeAt(i);
312
313    return OK;
314}
315
316void NuMediaExtractor::releaseTrackSamples() {
317    for (size_t i = 0; i < mSelectedTracks.size(); ++i) {
318        TrackInfo *info = &mSelectedTracks.editItemAt(i);
319
320        if (info->mSample != NULL) {
321            info->mSample->release();
322            info->mSample = NULL;
323
324            info->mSampleTimeUs = -1ll;
325        }
326    }
327}
328
329ssize_t NuMediaExtractor::fetchTrackSamples(
330        int64_t seekTimeUs, MediaSource::ReadOptions::SeekMode mode) {
331    TrackInfo *minInfo = NULL;
332    ssize_t minIndex = -1;
333
334    for (size_t i = 0; i < mSelectedTracks.size(); ++i) {
335        TrackInfo *info = &mSelectedTracks.editItemAt(i);
336
337        if (seekTimeUs >= 0ll) {
338            info->mFinalResult = OK;
339
340            if (info->mSample != NULL) {
341                info->mSample->release();
342                info->mSample = NULL;
343                info->mSampleTimeUs = -1ll;
344            }
345        } else if (info->mFinalResult != OK) {
346            continue;
347        }
348
349        if (info->mSample == NULL) {
350            MediaSource::ReadOptions options;
351            if (seekTimeUs >= 0ll) {
352                options.setSeekTo(seekTimeUs, mode);
353            }
354            status_t err = info->mSource->read(&info->mSample, &options);
355
356            if (err != OK) {
357                CHECK(info->mSample == NULL);
358
359                info->mFinalResult = err;
360
361                if (info->mFinalResult != ERROR_END_OF_STREAM) {
362                    ALOGW("read on track %d failed with error %d",
363                          info->mTrackIndex, err);
364                }
365
366                info->mSampleTimeUs = -1ll;
367                continue;
368            } else {
369                CHECK(info->mSample != NULL);
370                CHECK(info->mSample->meta_data()->findInt64(
371                            kKeyTime, &info->mSampleTimeUs));
372            }
373        }
374
375        if (minInfo == NULL  || info->mSampleTimeUs < minInfo->mSampleTimeUs) {
376            minInfo = info;
377            minIndex = i;
378        }
379    }
380
381    return minIndex;
382}
383
384status_t NuMediaExtractor::seekTo(
385        int64_t timeUs, MediaSource::ReadOptions::SeekMode mode) {
386    Mutex::Autolock autoLock(mLock);
387
388    ssize_t minIndex = fetchTrackSamples(timeUs, mode);
389
390    if (minIndex < 0) {
391        return ERROR_END_OF_STREAM;
392    }
393
394    return OK;
395}
396
397status_t NuMediaExtractor::advance() {
398    Mutex::Autolock autoLock(mLock);
399
400    ssize_t minIndex = fetchTrackSamples();
401
402    if (minIndex < 0) {
403        return ERROR_END_OF_STREAM;
404    }
405
406    TrackInfo *info = &mSelectedTracks.editItemAt(minIndex);
407
408    info->mSample->release();
409    info->mSample = NULL;
410    info->mSampleTimeUs = -1ll;
411
412    return OK;
413}
414
415status_t NuMediaExtractor::readSampleData(const sp<ABuffer> &buffer) {
416    Mutex::Autolock autoLock(mLock);
417
418    ssize_t minIndex = fetchTrackSamples();
419
420    if (minIndex < 0) {
421        return ERROR_END_OF_STREAM;
422    }
423
424    TrackInfo *info = &mSelectedTracks.editItemAt(minIndex);
425
426    size_t sampleSize = info->mSample->range_length();
427
428    if (info->mTrackFlags & kIsVorbis) {
429        // Each sample's data is suffixed by the number of page samples
430        // or -1 if not available.
431        sampleSize += sizeof(int32_t);
432    }
433
434    if (buffer->capacity() < sampleSize) {
435        return -ENOMEM;
436    }
437
438    const uint8_t *src =
439        (const uint8_t *)info->mSample->data()
440            + info->mSample->range_offset();
441
442    memcpy((uint8_t *)buffer->data(), src, info->mSample->range_length());
443
444    if (info->mTrackFlags & kIsVorbis) {
445        int32_t numPageSamples;
446        if (!info->mSample->meta_data()->findInt32(
447                    kKeyValidSamples, &numPageSamples)) {
448            numPageSamples = -1;
449        }
450
451        memcpy((uint8_t *)buffer->data() + info->mSample->range_length(),
452               &numPageSamples,
453               sizeof(numPageSamples));
454    }
455
456    buffer->setRange(0, sampleSize);
457
458    return OK;
459}
460
461status_t NuMediaExtractor::getSampleTrackIndex(size_t *trackIndex) {
462    Mutex::Autolock autoLock(mLock);
463
464    ssize_t minIndex = fetchTrackSamples();
465
466    if (minIndex < 0) {
467        return ERROR_END_OF_STREAM;
468    }
469
470    TrackInfo *info = &mSelectedTracks.editItemAt(minIndex);
471    *trackIndex = info->mTrackIndex;
472
473    return OK;
474}
475
476status_t NuMediaExtractor::getSampleTime(int64_t *sampleTimeUs) {
477    Mutex::Autolock autoLock(mLock);
478
479    ssize_t minIndex = fetchTrackSamples();
480
481    if (minIndex < 0) {
482        return ERROR_END_OF_STREAM;
483    }
484
485    TrackInfo *info = &mSelectedTracks.editItemAt(minIndex);
486    *sampleTimeUs = info->mSampleTimeUs;
487
488    return OK;
489}
490
491status_t NuMediaExtractor::getSampleMeta(sp<MetaData> *sampleMeta) {
492    Mutex::Autolock autoLock(mLock);
493
494    *sampleMeta = NULL;
495
496    ssize_t minIndex = fetchTrackSamples();
497
498    if (minIndex < 0) {
499        return ERROR_END_OF_STREAM;
500    }
501
502    TrackInfo *info = &mSelectedTracks.editItemAt(minIndex);
503    *sampleMeta = info->mSample->meta_data();
504
505    return OK;
506}
507
508bool NuMediaExtractor::getTotalBitrate(int64_t *bitrate) const {
509    if (mTotalBitrate >= 0) {
510        *bitrate = mTotalBitrate;
511        return true;
512    }
513
514    off64_t size;
515    if (mDurationUs >= 0 && mDataSource->getSize(&size) == OK) {
516        *bitrate = size * 8000000ll / mDurationUs;  // in bits/sec
517        return true;
518    }
519
520    return false;
521}
522
523// Returns true iff cached duration is available/applicable.
524bool NuMediaExtractor::getCachedDuration(
525        int64_t *durationUs, bool *eos) const {
526    Mutex::Autolock autoLock(mLock);
527
528    int64_t bitrate;
529    if (mIsWidevineExtractor) {
530        sp<WVMExtractor> wvmExtractor =
531            static_cast<WVMExtractor *>(mImpl.get());
532
533        status_t finalStatus;
534        *durationUs = wvmExtractor->getCachedDurationUs(&finalStatus);
535        *eos = (finalStatus != OK);
536        return true;
537    } else if ((mDataSource->flags() & DataSource::kIsCachingDataSource)
538            && getTotalBitrate(&bitrate)) {
539        sp<NuCachedSource2> cachedSource =
540            static_cast<NuCachedSource2 *>(mDataSource.get());
541
542        status_t finalStatus;
543        size_t cachedDataRemaining =
544            cachedSource->approxDataRemaining(&finalStatus);
545
546        *durationUs = cachedDataRemaining * 8000000ll / bitrate;
547        *eos = (finalStatus != OK);
548        return true;
549    }
550
551    return false;
552}
553
554}  // namespace android
555