StagefrightRecorder.cpp revision acd234bba9f048971d66890009eeff9a8db94be3 
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 "StagefrightRecorder"
19#include <utils/Log.h>
20
21#include "StagefrightRecorder.h"
22
23#include <binder/IPCThreadState.h>
24#include <media/stagefright/AudioSource.h>
25#include <media/stagefright/AMRWriter.h>
26#include <media/stagefright/CameraSource.h>
27#include <media/stagefright/MPEG2TSWriter.h>
28#include <media/stagefright/MPEG4Writer.h>
29#include <media/stagefright/MediaDebug.h>
30#include <media/stagefright/MediaDefs.h>
31#include <media/stagefright/MetaData.h>
32#include <media/stagefright/OMXClient.h>
33#include <media/stagefright/OMXCodec.h>
34#include <media/MediaProfiles.h>
35#include <camera/ICamera.h>
36#include <camera/Camera.h>
37#include <camera/CameraParameters.h>
38#include <surfaceflinger/ISurface.h>
39#include <utils/Errors.h>
40#include <sys/types.h>
41#include <unistd.h>
42#include <ctype.h>
43
44#include "ARTPWriter.h"
45
46namespace android {
47
48StagefrightRecorder::StagefrightRecorder()
49    : mWriter(NULL),
50      mOutputFd(-1) {
51
52    LOGV("Constructor");
53    reset();
54}
55
56StagefrightRecorder::~StagefrightRecorder() {
57    LOGV("Destructor");
58    stop();
59}
60
61status_t StagefrightRecorder::init() {
62    LOGV("init");
63    return OK;
64}
65
66status_t StagefrightRecorder::setAudioSource(audio_source as) {
67    LOGV("setAudioSource: %d", as);
68    if (as < AUDIO_SOURCE_DEFAULT ||
69        as >= AUDIO_SOURCE_LIST_END) {
70        LOGE("Invalid audio source: %d", as);
71        return BAD_VALUE;
72    }
73
74    if (as == AUDIO_SOURCE_DEFAULT) {
75        mAudioSource = AUDIO_SOURCE_MIC;
76    } else {
77        mAudioSource = as;
78    }
79
80    return OK;
81}
82
83status_t StagefrightRecorder::setVideoSource(video_source vs) {
84    LOGV("setVideoSource: %d", vs);
85    if (vs < VIDEO_SOURCE_DEFAULT ||
86        vs >= VIDEO_SOURCE_LIST_END) {
87        LOGE("Invalid video source: %d", vs);
88        return BAD_VALUE;
89    }
90
91    if (vs == VIDEO_SOURCE_DEFAULT) {
92        mVideoSource = VIDEO_SOURCE_CAMERA;
93    } else {
94        mVideoSource = vs;
95    }
96
97    return OK;
98}
99
100status_t StagefrightRecorder::setOutputFormat(output_format of) {
101    LOGV("setOutputFormat: %d", of);
102    if (of < OUTPUT_FORMAT_DEFAULT ||
103        of >= OUTPUT_FORMAT_LIST_END) {
104        LOGE("Invalid output format: %d", of);
105        return BAD_VALUE;
106    }
107
108    if (of == OUTPUT_FORMAT_DEFAULT) {
109        mOutputFormat = OUTPUT_FORMAT_THREE_GPP;
110    } else {
111        mOutputFormat = of;
112    }
113
114    return OK;
115}
116
117status_t StagefrightRecorder::setAudioEncoder(audio_encoder ae) {
118    LOGV("setAudioEncoder: %d", ae);
119    if (ae < AUDIO_ENCODER_DEFAULT ||
120        ae >= AUDIO_ENCODER_LIST_END) {
121        LOGE("Invalid audio encoder: %d", ae);
122        return BAD_VALUE;
123    }
124
125    if (ae == AUDIO_ENCODER_DEFAULT) {
126        mAudioEncoder = AUDIO_ENCODER_AMR_NB;
127    } else {
128        mAudioEncoder = ae;
129    }
130
131    return OK;
132}
133
134status_t StagefrightRecorder::setVideoEncoder(video_encoder ve) {
135    LOGV("setVideoEncoder: %d", ve);
136    if (ve < VIDEO_ENCODER_DEFAULT ||
137        ve >= VIDEO_ENCODER_LIST_END) {
138        LOGE("Invalid video encoder: %d", ve);
139        return BAD_VALUE;
140    }
141
142    if (ve == VIDEO_ENCODER_DEFAULT) {
143        mVideoEncoder = VIDEO_ENCODER_H263;
144    } else {
145        mVideoEncoder = ve;
146    }
147
148    return OK;
149}
150
151status_t StagefrightRecorder::setVideoSize(int width, int height) {
152    LOGV("setVideoSize: %dx%d", width, height);
153    if (width <= 0 || height <= 0) {
154        LOGE("Invalid video size: %dx%d", width, height);
155        return BAD_VALUE;
156    }
157
158    // Additional check on the dimension will be performed later
159    mVideoWidth = width;
160    mVideoHeight = height;
161
162    return OK;
163}
164
165status_t StagefrightRecorder::setVideoFrameRate(int frames_per_second) {
166    LOGV("setVideoFrameRate: %d", frames_per_second);
167    if (frames_per_second <= 0 || frames_per_second > 30) {
168        LOGE("Invalid video frame rate: %d", frames_per_second);
169        return BAD_VALUE;
170    }
171
172    // Additional check on the frame rate will be performed later
173    mFrameRate = frames_per_second;
174
175    return OK;
176}
177
178status_t StagefrightRecorder::setCamera(const sp<ICamera> &camera) {
179    LOGV("setCamera");
180    if (camera == 0) {
181        LOGE("camera is NULL");
182        return BAD_VALUE;
183    }
184
185    int64_t token = IPCThreadState::self()->clearCallingIdentity();
186    mFlags &= ~FLAGS_HOT_CAMERA;
187    mCamera = Camera::create(camera);
188    if (mCamera == 0) {
189        LOGE("Unable to connect to camera");
190        IPCThreadState::self()->restoreCallingIdentity(token);
191        return -EBUSY;
192    }
193
194    LOGV("Connected to camera");
195    if (mCamera->previewEnabled()) {
196        LOGV("camera is hot");
197        mFlags |= FLAGS_HOT_CAMERA;
198    }
199    IPCThreadState::self()->restoreCallingIdentity(token);
200
201    return OK;
202}
203
204status_t StagefrightRecorder::setPreviewSurface(const sp<ISurface> &surface) {
205    LOGV("setPreviewSurface: %p", surface.get());
206    mPreviewSurface = surface;
207
208    return OK;
209}
210
211status_t StagefrightRecorder::setOutputFile(const char *path) {
212    LOGE("setOutputFile(const char*) must not be called");
213    // We don't actually support this at all, as the media_server process
214    // no longer has permissions to create files.
215
216    return -EPERM;
217}
218
219status_t StagefrightRecorder::setOutputFile(int fd, int64_t offset, int64_t length) {
220    LOGV("setOutputFile: %d, %lld, %lld", fd, offset, length);
221    // These don't make any sense, do they?
222    CHECK_EQ(offset, 0);
223    CHECK_EQ(length, 0);
224
225    if (fd < 0) {
226        LOGE("Invalid file descriptor: %d", fd);
227        return -EBADF;
228    }
229
230    if (mOutputFd >= 0) {
231        ::close(mOutputFd);
232    }
233    mOutputFd = dup(fd);
234
235    return OK;
236}
237
238// Attempt to parse an int64 literal optionally surrounded by whitespace,
239// returns true on success, false otherwise.
240static bool safe_strtoi64(const char *s, int64_t *val) {
241    char *end;
242    *val = strtoll(s, &end, 10);
243
244    if (end == s || errno == ERANGE) {
245        return false;
246    }
247
248    // Skip trailing whitespace
249    while (isspace(*end)) {
250        ++end;
251    }
252
253    // For a successful return, the string must contain nothing but a valid
254    // int64 literal optionally surrounded by whitespace.
255
256    return *end == '\0';
257}
258
259// Return true if the value is in [0, 0x007FFFFFFF]
260static bool safe_strtoi32(const char *s, int32_t *val) {
261    int64_t temp;
262    if (safe_strtoi64(s, &temp)) {
263        if (temp >= 0 && temp <= 0x007FFFFFFF) {
264            *val = static_cast<int32_t>(temp);
265            return true;
266        }
267    }
268    return false;
269}
270
271// Trim both leading and trailing whitespace from the given string.
272static void TrimString(String8 *s) {
273    size_t num_bytes = s->bytes();
274    const char *data = s->string();
275
276    size_t leading_space = 0;
277    while (leading_space < num_bytes && isspace(data[leading_space])) {
278        ++leading_space;
279    }
280
281    size_t i = num_bytes;
282    while (i > leading_space && isspace(data[i - 1])) {
283        --i;
284    }
285
286    s->setTo(String8(&data[leading_space], i - leading_space));
287}
288
289status_t StagefrightRecorder::setParamAudioSamplingRate(int32_t sampleRate) {
290    LOGV("setParamAudioSamplingRate: %d", sampleRate);
291    if (sampleRate <= 0) {
292        LOGE("Invalid audio sampling rate: %d", sampleRate);
293        return BAD_VALUE;
294    }
295
296    // Additional check on the sample rate will be performed later.
297    mSampleRate = sampleRate;
298    return OK;
299}
300
301status_t StagefrightRecorder::setParamAudioNumberOfChannels(int32_t channels) {
302    LOGV("setParamAudioNumberOfChannels: %d", channels);
303    if (channels <= 0 || channels >= 3) {
304        LOGE("Invalid number of audio channels: %d", channels);
305        return BAD_VALUE;
306    }
307
308    // Additional check on the number of channels will be performed later.
309    mAudioChannels = channels;
310    return OK;
311}
312
313status_t StagefrightRecorder::setParamAudioEncodingBitRate(int32_t bitRate) {
314    LOGV("setParamAudioEncodingBitRate: %d", bitRate);
315    if (bitRate <= 0) {
316        LOGE("Invalid audio encoding bit rate: %d", bitRate);
317        return BAD_VALUE;
318    }
319
320    // The target bit rate may not be exactly the same as the requested.
321    // It depends on many factors, such as rate control, and the bit rate
322    // range that a specific encoder supports. The mismatch between the
323    // the target and requested bit rate will NOT be treated as an error.
324    mAudioBitRate = bitRate;
325    return OK;
326}
327
328status_t StagefrightRecorder::setParamVideoEncodingBitRate(int32_t bitRate) {
329    LOGV("setParamVideoEncodingBitRate: %d", bitRate);
330    if (bitRate <= 0) {
331        LOGE("Invalid video encoding bit rate: %d", bitRate);
332        return BAD_VALUE;
333    }
334
335    // The target bit rate may not be exactly the same as the requested.
336    // It depends on many factors, such as rate control, and the bit rate
337    // range that a specific encoder supports. The mismatch between the
338    // the target and requested bit rate will NOT be treated as an error.
339    mVideoBitRate = bitRate;
340    return OK;
341}
342
343// Always rotate clockwise, and only support 0, 90, 180 and 270 for now.
344status_t StagefrightRecorder::setParamVideoRotation(int32_t degrees) {
345    LOGV("setParamVideoRotation: %d", degrees);
346    if (degrees < 0 || degrees % 90 != 0) {
347        LOGE("Unsupported video rotation angle: %d", degrees);
348        return BAD_VALUE;
349    }
350    mRotationDegrees = degrees % 360;
351    return OK;
352}
353
354status_t StagefrightRecorder::setParamMaxFileDurationUs(int64_t timeUs) {
355    LOGV("setParamMaxFileDurationUs: %lld us", timeUs);
356    if (timeUs <= 0) {
357        LOGW("Max file duration is not positive: %lld us. Disabling duration limit.", timeUs);
358        timeUs = 0; // Disable the duration limit for zero or negative values.
359    } else if (timeUs <= 100000LL) {  // XXX: 100 milli-seconds
360        LOGE("Max file duration is too short: %lld us", timeUs);
361        return BAD_VALUE;
362    }
363
364    if (timeUs <= 15 * 1000000LL) {
365        LOGW("Target duration (%lld us) too short to be respected", timeUs);
366    }
367    mMaxFileDurationUs = timeUs;
368    return OK;
369}
370
371status_t StagefrightRecorder::setParamMaxFileSizeBytes(int64_t bytes) {
372    LOGV("setParamMaxFileSizeBytes: %lld bytes", bytes);
373    if (bytes <= 1024) {  // XXX: 1 kB
374        LOGE("Max file size is too small: %lld bytes", bytes);
375        return BAD_VALUE;
376    }
377
378    if (bytes <= 100 * 1024) {
379        LOGW("Target file size (%lld bytes) is too small to be respected", bytes);
380    }
381
382    mMaxFileSizeBytes = bytes;
383    return OK;
384}
385
386status_t StagefrightRecorder::setParamInterleaveDuration(int32_t durationUs) {
387    LOGV("setParamInterleaveDuration: %d", durationUs);
388    if (durationUs <= 500000) {           //  500 ms
389        // If interleave duration is too small, it is very inefficient to do
390        // interleaving since the metadata overhead will count for a significant
391        // portion of the saved contents
392        LOGE("Audio/video interleave duration is too small: %d us", durationUs);
393        return BAD_VALUE;
394    } else if (durationUs >= 10000000) {  // 10 seconds
395        // If interleaving duration is too large, it can cause the recording
396        // session to use too much memory since we have to save the output
397        // data before we write them out
398        LOGE("Audio/video interleave duration is too large: %d us", durationUs);
399        return BAD_VALUE;
400    }
401    mInterleaveDurationUs = durationUs;
402    return OK;
403}
404
405// If seconds <  0, only the first frame is I frame, and rest are all P frames
406// If seconds == 0, all frames are encoded as I frames. No P frames
407// If seconds >  0, it is the time spacing (seconds) between 2 neighboring I frames
408status_t StagefrightRecorder::setParamVideoIFramesInterval(int32_t seconds) {
409    LOGV("setParamVideoIFramesInterval: %d seconds", seconds);
410    mIFramesIntervalSec = seconds;
411    return OK;
412}
413
414status_t StagefrightRecorder::setParam64BitFileOffset(bool use64Bit) {
415    LOGV("setParam64BitFileOffset: %s",
416        use64Bit? "use 64 bit file offset": "use 32 bit file offset");
417    mUse64BitFileOffset = use64Bit;
418    return OK;
419}
420
421status_t StagefrightRecorder::setParamVideoCameraId(int32_t cameraId) {
422    LOGV("setParamVideoCameraId: %d", cameraId);
423    if (cameraId < 0) {
424        return BAD_VALUE;
425    }
426    mCameraId = cameraId;
427    return OK;
428}
429
430status_t StagefrightRecorder::setParamTrackTimeStatus(int64_t timeDurationUs) {
431    LOGV("setParamTrackTimeStatus: %lld", timeDurationUs);
432    if (timeDurationUs < 20000) {  // Infeasible if shorter than 20 ms?
433        LOGE("Tracking time duration too short: %lld us", timeDurationUs);
434        return BAD_VALUE;
435    }
436    mTrackEveryTimeDurationUs = timeDurationUs;
437    return OK;
438}
439
440status_t StagefrightRecorder::setParamVideoEncoderProfile(int32_t profile) {
441    LOGV("setParamVideoEncoderProfile: %d", profile);
442
443    // Additional check will be done later when we load the encoder.
444    // For now, we are accepting values defined in OpenMAX IL.
445    mVideoEncoderProfile = profile;
446    return OK;
447}
448
449status_t StagefrightRecorder::setParamVideoEncoderLevel(int32_t level) {
450    LOGV("setParamVideoEncoderLevel: %d", level);
451
452    // Additional check will be done later when we load the encoder.
453    // For now, we are accepting values defined in OpenMAX IL.
454    mVideoEncoderLevel = level;
455    return OK;
456}
457
458status_t StagefrightRecorder::setParamMovieTimeScale(int32_t timeScale) {
459    LOGV("setParamMovieTimeScale: %d", timeScale);
460
461    // The range is set to be the same as the audio's time scale range
462    // since audio's time scale has a wider range.
463    if (timeScale < 600 || timeScale > 96000) {
464        LOGE("Time scale (%d) for movie is out of range [600, 96000]", timeScale);
465        return BAD_VALUE;
466    }
467    mMovieTimeScale = timeScale;
468    return OK;
469}
470
471status_t StagefrightRecorder::setParamVideoTimeScale(int32_t timeScale) {
472    LOGV("setParamVideoTimeScale: %d", timeScale);
473
474    // 60000 is chosen to make sure that each video frame from a 60-fps
475    // video has 1000 ticks.
476    if (timeScale < 600 || timeScale > 60000) {
477        LOGE("Time scale (%d) for video is out of range [600, 60000]", timeScale);
478        return BAD_VALUE;
479    }
480    mVideoTimeScale = timeScale;
481    return OK;
482}
483
484status_t StagefrightRecorder::setParamAudioTimeScale(int32_t timeScale) {
485    LOGV("setParamAudioTimeScale: %d", timeScale);
486
487    // 96000 Hz is the highest sampling rate support in AAC.
488    if (timeScale < 600 || timeScale > 96000) {
489        LOGE("Time scale (%d) for audio is out of range [600, 96000]", timeScale);
490        return BAD_VALUE;
491    }
492    mAudioTimeScale = timeScale;
493    return OK;
494}
495
496status_t StagefrightRecorder::setParameter(
497        const String8 &key, const String8 &value) {
498    LOGV("setParameter: key (%s) => value (%s)", key.string(), value.string());
499    if (key == "max-duration") {
500        int64_t max_duration_ms;
501        if (safe_strtoi64(value.string(), &max_duration_ms)) {
502            return setParamMaxFileDurationUs(1000LL * max_duration_ms);
503        }
504    } else if (key == "max-filesize") {
505        int64_t max_filesize_bytes;
506        if (safe_strtoi64(value.string(), &max_filesize_bytes)) {
507            return setParamMaxFileSizeBytes(max_filesize_bytes);
508        }
509    } else if (key == "interleave-duration-us") {
510        int32_t durationUs;
511        if (safe_strtoi32(value.string(), &durationUs)) {
512            return setParamInterleaveDuration(durationUs);
513        }
514    } else if (key == "param-movie-time-scale") {
515        int32_t timeScale;
516        if (safe_strtoi32(value.string(), &timeScale)) {
517            return setParamMovieTimeScale(timeScale);
518        }
519    } else if (key == "param-use-64bit-offset") {
520        int32_t use64BitOffset;
521        if (safe_strtoi32(value.string(), &use64BitOffset)) {
522            return setParam64BitFileOffset(use64BitOffset != 0);
523        }
524    } else if (key == "param-track-time-status") {
525        int64_t timeDurationUs;
526        if (safe_strtoi64(value.string(), &timeDurationUs)) {
527            return setParamTrackTimeStatus(timeDurationUs);
528        }
529    } else if (key == "audio-param-sampling-rate") {
530        int32_t sampling_rate;
531        if (safe_strtoi32(value.string(), &sampling_rate)) {
532            return setParamAudioSamplingRate(sampling_rate);
533        }
534    } else if (key == "audio-param-number-of-channels") {
535        int32_t number_of_channels;
536        if (safe_strtoi32(value.string(), &number_of_channels)) {
537            return setParamAudioNumberOfChannels(number_of_channels);
538        }
539    } else if (key == "audio-param-encoding-bitrate") {
540        int32_t audio_bitrate;
541        if (safe_strtoi32(value.string(), &audio_bitrate)) {
542            return setParamAudioEncodingBitRate(audio_bitrate);
543        }
544    } else if (key == "audio-param-time-scale") {
545        int32_t timeScale;
546        if (safe_strtoi32(value.string(), &timeScale)) {
547            return setParamAudioTimeScale(timeScale);
548        }
549    } else if (key == "video-param-encoding-bitrate") {
550        int32_t video_bitrate;
551        if (safe_strtoi32(value.string(), &video_bitrate)) {
552            return setParamVideoEncodingBitRate(video_bitrate);
553        }
554    } else if (key == "video-param-rotation-angle-degrees") {
555        int32_t degrees;
556        if (safe_strtoi32(value.string(), &degrees)) {
557            return setParamVideoRotation(degrees);
558        }
559    } else if (key == "video-param-i-frames-interval") {
560        int32_t seconds;
561        if (safe_strtoi32(value.string(), &seconds)) {
562            return setParamVideoIFramesInterval(seconds);
563        }
564    } else if (key == "video-param-encoder-profile") {
565        int32_t profile;
566        if (safe_strtoi32(value.string(), &profile)) {
567            return setParamVideoEncoderProfile(profile);
568        }
569    } else if (key == "video-param-encoder-level") {
570        int32_t level;
571        if (safe_strtoi32(value.string(), &level)) {
572            return setParamVideoEncoderLevel(level);
573        }
574    } else if (key == "video-param-camera-id") {
575        int32_t cameraId;
576        if (safe_strtoi32(value.string(), &cameraId)) {
577            return setParamVideoCameraId(cameraId);
578        }
579    } else if (key == "video-param-time-scale") {
580        int32_t timeScale;
581        if (safe_strtoi32(value.string(), &timeScale)) {
582            return setParamVideoTimeScale(timeScale);
583        }
584    } else {
585        LOGE("setParameter: failed to find key %s", key.string());
586    }
587    return BAD_VALUE;
588}
589
590status_t StagefrightRecorder::setParameters(const String8 &params) {
591    LOGV("setParameters: %s", params.string());
592    const char *cparams = params.string();
593    const char *key_start = cparams;
594    for (;;) {
595        const char *equal_pos = strchr(key_start, '=');
596        if (equal_pos == NULL) {
597            LOGE("Parameters %s miss a value", cparams);
598            return BAD_VALUE;
599        }
600        String8 key(key_start, equal_pos - key_start);
601        TrimString(&key);
602        if (key.length() == 0) {
603            LOGE("Parameters %s contains an empty key", cparams);
604            return BAD_VALUE;
605        }
606        const char *value_start = equal_pos + 1;
607        const char *semicolon_pos = strchr(value_start, ';');
608        String8 value;
609        if (semicolon_pos == NULL) {
610            value.setTo(value_start);
611        } else {
612            value.setTo(value_start, semicolon_pos - value_start);
613        }
614        if (setParameter(key, value) != OK) {
615            return BAD_VALUE;
616        }
617        if (semicolon_pos == NULL) {
618            break;  // Reaches the end
619        }
620        key_start = semicolon_pos + 1;
621    }
622    return OK;
623}
624
625status_t StagefrightRecorder::setListener(const sp<IMediaRecorderClient> &listener) {
626    mListener = listener;
627
628    return OK;
629}
630
631status_t StagefrightRecorder::prepare() {
632    return OK;
633}
634
635status_t StagefrightRecorder::start() {
636    CHECK(mOutputFd >= 0);
637
638    if (mWriter != NULL) {
639        LOGE("File writer is not avaialble");
640        return UNKNOWN_ERROR;
641    }
642
643    switch (mOutputFormat) {
644        case OUTPUT_FORMAT_DEFAULT:
645        case OUTPUT_FORMAT_THREE_GPP:
646        case OUTPUT_FORMAT_MPEG_4:
647            return startMPEG4Recording();
648
649        case OUTPUT_FORMAT_AMR_NB:
650        case OUTPUT_FORMAT_AMR_WB:
651            return startAMRRecording();
652
653        case OUTPUT_FORMAT_AAC_ADIF:
654        case OUTPUT_FORMAT_AAC_ADTS:
655            return startAACRecording();
656
657        case OUTPUT_FORMAT_RTP_AVP:
658            return startRTPRecording();
659
660        case OUTPUT_FORMAT_MPEG2TS:
661            return startMPEG2TSRecording();
662
663        default:
664            LOGE("Unsupported output file format: %d", mOutputFormat);
665            return UNKNOWN_ERROR;
666    }
667}
668
669sp<MediaSource> StagefrightRecorder::createAudioSource() {
670    sp<AudioSource> audioSource =
671        new AudioSource(
672                mAudioSource,
673                mSampleRate,
674                mAudioChannels);
675
676    status_t err = audioSource->initCheck();
677
678    if (err != OK) {
679        LOGE("audio source is not initialized");
680        return NULL;
681    }
682
683    sp<MetaData> encMeta = new MetaData;
684    const char *mime;
685    switch (mAudioEncoder) {
686        case AUDIO_ENCODER_AMR_NB:
687        case AUDIO_ENCODER_DEFAULT:
688            mime = MEDIA_MIMETYPE_AUDIO_AMR_NB;
689            break;
690        case AUDIO_ENCODER_AMR_WB:
691            mime = MEDIA_MIMETYPE_AUDIO_AMR_WB;
692            break;
693        case AUDIO_ENCODER_AAC:
694            mime = MEDIA_MIMETYPE_AUDIO_AAC;
695            break;
696        default:
697            LOGE("Unknown audio encoder: %d", mAudioEncoder);
698            return NULL;
699    }
700    encMeta->setCString(kKeyMIMEType, mime);
701
702    int32_t maxInputSize;
703    CHECK(audioSource->getFormat()->findInt32(
704                kKeyMaxInputSize, &maxInputSize));
705
706    encMeta->setInt32(kKeyMaxInputSize, maxInputSize);
707    encMeta->setInt32(kKeyChannelCount, mAudioChannels);
708    encMeta->setInt32(kKeySampleRate, mSampleRate);
709    encMeta->setInt32(kKeyBitRate, mAudioBitRate);
710    if (mAudioTimeScale > 0) {
711        encMeta->setInt32(kKeyTimeScale, mAudioTimeScale);
712    }
713
714    OMXClient client;
715    CHECK_EQ(client.connect(), OK);
716
717    sp<MediaSource> audioEncoder =
718        OMXCodec::Create(client.interface(), encMeta,
719                         true /* createEncoder */, audioSource);
720    mAudioSourceNode = audioSource;
721
722    return audioEncoder;
723}
724
725status_t StagefrightRecorder::startAACRecording() {
726    CHECK(mOutputFormat == OUTPUT_FORMAT_AAC_ADIF ||
727          mOutputFormat == OUTPUT_FORMAT_AAC_ADTS);
728
729    CHECK(mAudioEncoder == AUDIO_ENCODER_AAC);
730    CHECK(mAudioSource != AUDIO_SOURCE_LIST_END);
731
732    CHECK(0 == "AACWriter is not implemented yet");
733
734    return OK;
735}
736
737status_t StagefrightRecorder::startAMRRecording() {
738    CHECK(mOutputFormat == OUTPUT_FORMAT_AMR_NB ||
739          mOutputFormat == OUTPUT_FORMAT_AMR_WB);
740
741    if (mOutputFormat == OUTPUT_FORMAT_AMR_NB) {
742        if (mAudioEncoder != AUDIO_ENCODER_DEFAULT &&
743            mAudioEncoder != AUDIO_ENCODER_AMR_NB) {
744            LOGE("Invalid encoder %d used for AMRNB recording",
745                    mAudioEncoder);
746            return BAD_VALUE;
747        }
748        if (mSampleRate != 8000) {
749            LOGE("Invalid sampling rate %d used for AMRNB recording",
750                    mSampleRate);
751            return BAD_VALUE;
752        }
753    } else {  // mOutputFormat must be OUTPUT_FORMAT_AMR_WB
754        if (mAudioEncoder != AUDIO_ENCODER_AMR_WB) {
755            LOGE("Invlaid encoder %d used for AMRWB recording",
756                    mAudioEncoder);
757            return BAD_VALUE;
758        }
759        if (mSampleRate != 16000) {
760            LOGE("Invalid sample rate %d used for AMRWB recording",
761                    mSampleRate);
762            return BAD_VALUE;
763        }
764    }
765    if (mAudioChannels != 1) {
766        LOGE("Invalid number of audio channels %d used for amr recording",
767                mAudioChannels);
768        return BAD_VALUE;
769    }
770
771    if (mAudioSource >= AUDIO_SOURCE_LIST_END) {
772        LOGE("Invalid audio source: %d", mAudioSource);
773        return BAD_VALUE;
774    }
775
776    sp<MediaSource> audioEncoder = createAudioSource();
777
778    if (audioEncoder == NULL) {
779        return UNKNOWN_ERROR;
780    }
781
782    mWriter = new AMRWriter(dup(mOutputFd));
783    mWriter->addSource(audioEncoder);
784
785    if (mMaxFileDurationUs != 0) {
786        mWriter->setMaxFileDuration(mMaxFileDurationUs);
787    }
788    if (mMaxFileSizeBytes != 0) {
789        mWriter->setMaxFileSize(mMaxFileSizeBytes);
790    }
791    mWriter->setListener(mListener);
792    mWriter->start();
793
794    return OK;
795}
796
797status_t StagefrightRecorder::startRTPRecording() {
798    CHECK_EQ(mOutputFormat, OUTPUT_FORMAT_RTP_AVP);
799
800    if ((mAudioSource != AUDIO_SOURCE_LIST_END
801                && mVideoSource != VIDEO_SOURCE_LIST_END)
802            || (mAudioSource == AUDIO_SOURCE_LIST_END
803                && mVideoSource == VIDEO_SOURCE_LIST_END)) {
804        // Must have exactly one source.
805        return BAD_VALUE;
806    }
807
808    if (mOutputFd < 0) {
809        return BAD_VALUE;
810    }
811
812    sp<MediaSource> source;
813
814    if (mAudioSource != AUDIO_SOURCE_LIST_END) {
815        source = createAudioSource();
816    } else {
817        status_t err = setupVideoEncoder(&source);
818        if (err != OK) {
819            return err;
820        }
821    }
822
823    mWriter = new ARTPWriter(dup(mOutputFd));
824    mWriter->addSource(source);
825    mWriter->setListener(mListener);
826
827    return mWriter->start();
828}
829
830status_t StagefrightRecorder::startMPEG2TSRecording() {
831    CHECK_EQ(mOutputFormat, OUTPUT_FORMAT_MPEG2TS);
832
833    sp<MediaWriter> writer = new MPEG2TSWriter(dup(mOutputFd));
834
835    if (mAudioSource != AUDIO_SOURCE_LIST_END) {
836        if (mAudioEncoder != AUDIO_ENCODER_AAC) {
837            return ERROR_UNSUPPORTED;
838        }
839
840        status_t err = setupAudioEncoder(writer);
841
842        if (err != OK) {
843            return err;
844        }
845    }
846
847    if (mVideoSource == VIDEO_SOURCE_DEFAULT
848            || mVideoSource == VIDEO_SOURCE_CAMERA) {
849        if (mVideoEncoder != VIDEO_ENCODER_H264) {
850            return ERROR_UNSUPPORTED;
851        }
852
853        sp<MediaSource> encoder;
854        status_t err = setupVideoEncoder(&encoder);
855
856        if (err != OK) {
857            return err;
858        }
859
860        writer->addSource(encoder);
861    }
862
863    if (mMaxFileDurationUs != 0) {
864        writer->setMaxFileDuration(mMaxFileDurationUs);
865    }
866
867    if (mMaxFileSizeBytes != 0) {
868        writer->setMaxFileSize(mMaxFileSizeBytes);
869    }
870
871    mWriter = writer;
872
873    return mWriter->start();
874}
875
876void StagefrightRecorder::clipVideoFrameRate() {
877    LOGV("clipVideoFrameRate: encoder %d", mVideoEncoder);
878    int minFrameRate = mEncoderProfiles->getVideoEncoderParamByName(
879                        "enc.vid.fps.min", mVideoEncoder);
880    int maxFrameRate = mEncoderProfiles->getVideoEncoderParamByName(
881                        "enc.vid.fps.max", mVideoEncoder);
882    if (mFrameRate < minFrameRate) {
883        LOGW("Intended video encoding frame rate (%d fps) is too small"
884             " and will be set to (%d fps)", mFrameRate, minFrameRate);
885        mFrameRate = minFrameRate;
886    } else if (mFrameRate > maxFrameRate) {
887        LOGW("Intended video encoding frame rate (%d fps) is too large"
888             " and will be set to (%d fps)", mFrameRate, maxFrameRate);
889        mFrameRate = maxFrameRate;
890    }
891}
892
893void StagefrightRecorder::clipVideoBitRate() {
894    LOGV("clipVideoBitRate: encoder %d", mVideoEncoder);
895    int minBitRate = mEncoderProfiles->getVideoEncoderParamByName(
896                        "enc.vid.bps.min", mVideoEncoder);
897    int maxBitRate = mEncoderProfiles->getVideoEncoderParamByName(
898                        "enc.vid.bps.max", mVideoEncoder);
899    if (mVideoBitRate < minBitRate) {
900        LOGW("Intended video encoding bit rate (%d bps) is too small"
901             " and will be set to (%d bps)", mVideoBitRate, minBitRate);
902        mVideoBitRate = minBitRate;
903    } else if (mVideoBitRate > maxBitRate) {
904        LOGW("Intended video encoding bit rate (%d bps) is too large"
905             " and will be set to (%d bps)", mVideoBitRate, maxBitRate);
906        mVideoBitRate = maxBitRate;
907    }
908}
909
910void StagefrightRecorder::clipVideoFrameWidth() {
911    LOGV("clipVideoFrameWidth: encoder %d", mVideoEncoder);
912    int minFrameWidth = mEncoderProfiles->getVideoEncoderParamByName(
913                        "enc.vid.width.min", mVideoEncoder);
914    int maxFrameWidth = mEncoderProfiles->getVideoEncoderParamByName(
915                        "enc.vid.width.max", mVideoEncoder);
916    if (mVideoWidth < minFrameWidth) {
917        LOGW("Intended video encoding frame width (%d) is too small"
918             " and will be set to (%d)", mVideoWidth, minFrameWidth);
919        mVideoWidth = minFrameWidth;
920    } else if (mVideoWidth > maxFrameWidth) {
921        LOGW("Intended video encoding frame width (%d) is too large"
922             " and will be set to (%d)", mVideoWidth, maxFrameWidth);
923        mVideoWidth = maxFrameWidth;
924    }
925}
926
927status_t StagefrightRecorder::setupCameraSource() {
928    clipVideoBitRate();
929    clipVideoFrameRate();
930    clipVideoFrameWidth();
931    clipVideoFrameHeight();
932
933    int64_t token = IPCThreadState::self()->clearCallingIdentity();
934    if (mCamera == 0) {
935        mCamera = Camera::connect(mCameraId);
936        if (mCamera == 0) {
937            LOGE("Camera connection could not be established.");
938            return -EBUSY;
939        }
940        mFlags &= ~FLAGS_HOT_CAMERA;
941        mCamera->lock();
942    }
943
944    // Set the actual video recording frame size
945    CameraParameters params(mCamera->getParameters());
946    params.setPreviewSize(mVideoWidth, mVideoHeight);
947    params.setPreviewFrameRate(mFrameRate);
948    String8 s = params.flatten();
949    if (OK != mCamera->setParameters(s)) {
950        LOGE("Could not change settings."
951             " Someone else is using camera %d?", mCameraId);
952        return -EBUSY;
953    }
954    CameraParameters newCameraParams(mCamera->getParameters());
955
956    // Check on video frame size
957    int frameWidth = 0, frameHeight = 0;
958    newCameraParams.getPreviewSize(&frameWidth, &frameHeight);
959    if (frameWidth  < 0 || frameWidth  != mVideoWidth ||
960        frameHeight < 0 || frameHeight != mVideoHeight) {
961        LOGE("Failed to set the video frame size to %dx%d",
962                mVideoWidth, mVideoHeight);
963        IPCThreadState::self()->restoreCallingIdentity(token);
964        return UNKNOWN_ERROR;
965    }
966
967    // Check on video frame rate
968    int frameRate = newCameraParams.getPreviewFrameRate();
969    if (frameRate < 0 || (frameRate - mFrameRate) != 0) {
970        LOGE("Failed to set frame rate to %d fps. The actual "
971             "frame rate is %d", mFrameRate, frameRate);
972    }
973
974    // This CHECK is good, since we just passed the lock/unlock
975    // check earlier by calling mCamera->setParameters().
976    CHECK_EQ(OK, mCamera->setPreviewDisplay(mPreviewSurface));
977    IPCThreadState::self()->restoreCallingIdentity(token);
978    return OK;
979}
980
981void StagefrightRecorder::clipVideoFrameHeight() {
982    LOGV("clipVideoFrameHeight: encoder %d", mVideoEncoder);
983    int minFrameHeight = mEncoderProfiles->getVideoEncoderParamByName(
984                        "enc.vid.height.min", mVideoEncoder);
985    int maxFrameHeight = mEncoderProfiles->getVideoEncoderParamByName(
986                        "enc.vid.height.max", mVideoEncoder);
987    if (mVideoHeight < minFrameHeight) {
988        LOGW("Intended video encoding frame height (%d) is too small"
989             " and will be set to (%d)", mVideoHeight, minFrameHeight);
990        mVideoHeight = minFrameHeight;
991    } else if (mVideoHeight > maxFrameHeight) {
992        LOGW("Intended video encoding frame height (%d) is too large"
993             " and will be set to (%d)", mVideoHeight, maxFrameHeight);
994        mVideoHeight = maxFrameHeight;
995    }
996}
997
998status_t StagefrightRecorder::setupVideoEncoder(sp<MediaSource> *source) {
999    source->clear();
1000
1001    status_t err = setupCameraSource();
1002    if (err != OK) return err;
1003
1004    sp<CameraSource> cameraSource = CameraSource::CreateFromCamera(mCamera);
1005    CHECK(cameraSource != NULL);
1006
1007    sp<MetaData> enc_meta = new MetaData;
1008    enc_meta->setInt32(kKeyBitRate, mVideoBitRate);
1009    enc_meta->setInt32(kKeySampleRate, mFrameRate);
1010
1011    switch (mVideoEncoder) {
1012        case VIDEO_ENCODER_H263:
1013            enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_H263);
1014            break;
1015
1016        case VIDEO_ENCODER_MPEG_4_SP:
1017            enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_MPEG4);
1018            break;
1019
1020        case VIDEO_ENCODER_H264:
1021            enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_AVC);
1022            break;
1023
1024        default:
1025            CHECK(!"Should not be here, unsupported video encoding.");
1026            break;
1027    }
1028
1029    sp<MetaData> meta = cameraSource->getFormat();
1030
1031    int32_t width, height, stride, sliceHeight, colorFormat;
1032    CHECK(meta->findInt32(kKeyWidth, &width));
1033    CHECK(meta->findInt32(kKeyHeight, &height));
1034    CHECK(meta->findInt32(kKeyStride, &stride));
1035    CHECK(meta->findInt32(kKeySliceHeight, &sliceHeight));
1036    CHECK(meta->findInt32(kKeyColorFormat, &colorFormat));
1037
1038    enc_meta->setInt32(kKeyWidth, width);
1039    enc_meta->setInt32(kKeyHeight, height);
1040    enc_meta->setInt32(kKeyIFramesInterval, mIFramesIntervalSec);
1041    enc_meta->setInt32(kKeyStride, stride);
1042    enc_meta->setInt32(kKeySliceHeight, sliceHeight);
1043    enc_meta->setInt32(kKeyColorFormat, colorFormat);
1044    if (mVideoTimeScale > 0) {
1045        enc_meta->setInt32(kKeyTimeScale, mVideoTimeScale);
1046    }
1047    if (mVideoEncoderProfile != -1) {
1048        enc_meta->setInt32(kKeyVideoProfile, mVideoEncoderProfile);
1049    }
1050    if (mVideoEncoderLevel != -1) {
1051        enc_meta->setInt32(kKeyVideoLevel, mVideoEncoderLevel);
1052    }
1053
1054    OMXClient client;
1055    CHECK_EQ(client.connect(), OK);
1056
1057    sp<MediaSource> encoder = OMXCodec::Create(
1058            client.interface(), enc_meta,
1059            true /* createEncoder */, cameraSource);
1060    if (encoder == NULL) {
1061        return UNKNOWN_ERROR;
1062    }
1063
1064    *source = encoder;
1065
1066    return OK;
1067}
1068
1069status_t StagefrightRecorder::setupAudioEncoder(const sp<MediaWriter>& writer) {
1070    sp<MediaSource> audioEncoder;
1071    switch(mAudioEncoder) {
1072        case AUDIO_ENCODER_AMR_NB:
1073        case AUDIO_ENCODER_AMR_WB:
1074        case AUDIO_ENCODER_AAC:
1075            audioEncoder = createAudioSource();
1076            break;
1077        default:
1078            LOGE("Unsupported audio encoder: %d", mAudioEncoder);
1079            return UNKNOWN_ERROR;
1080    }
1081
1082    if (audioEncoder == NULL) {
1083        return UNKNOWN_ERROR;
1084    }
1085
1086    writer->addSource(audioEncoder);
1087    return OK;
1088}
1089
1090status_t StagefrightRecorder::startMPEG4Recording() {
1091    int32_t totalBitRate = 0;
1092    status_t err = OK;
1093    sp<MediaWriter> writer = new MPEG4Writer(dup(mOutputFd));
1094
1095    // Add audio source first if it exists
1096    if (mAudioSource != AUDIO_SOURCE_LIST_END) {
1097        err = setupAudioEncoder(writer);
1098        if (err != OK) return err;
1099        totalBitRate += mAudioBitRate;
1100    }
1101    if (mVideoSource == VIDEO_SOURCE_DEFAULT
1102            || mVideoSource == VIDEO_SOURCE_CAMERA) {
1103        sp<MediaSource> encoder;
1104        err = setupVideoEncoder(&encoder);
1105        if (err != OK) return err;
1106        writer->addSource(encoder);
1107        totalBitRate += mVideoBitRate;
1108    }
1109
1110    if (mInterleaveDurationUs > 0) {
1111        reinterpret_cast<MPEG4Writer *>(writer.get())->
1112            setInterleaveDuration(mInterleaveDurationUs);
1113    }
1114
1115    if (mMaxFileDurationUs != 0) {
1116        writer->setMaxFileDuration(mMaxFileDurationUs);
1117    }
1118    if (mMaxFileSizeBytes != 0) {
1119        writer->setMaxFileSize(mMaxFileSizeBytes);
1120    }
1121    sp<MetaData> meta = new MetaData;
1122    meta->setInt64(kKeyTime, systemTime() / 1000);
1123    meta->setInt32(kKeyFileType, mOutputFormat);
1124    meta->setInt32(kKeyBitRate, totalBitRate);
1125    meta->setInt32(kKey64BitFileOffset, mUse64BitFileOffset);
1126    if (mMovieTimeScale > 0) {
1127        meta->setInt32(kKeyTimeScale, mMovieTimeScale);
1128    }
1129    if (mTrackEveryTimeDurationUs > 0) {
1130        meta->setInt64(kKeyTrackTimeStatus, mTrackEveryTimeDurationUs);
1131    }
1132    if (mRotationDegrees != 0) {
1133        meta->setInt32(kKeyRotationDegree, mRotationDegrees);
1134    }
1135    writer->setListener(mListener);
1136    mWriter = writer;
1137    return mWriter->start(meta.get());
1138}
1139
1140status_t StagefrightRecorder::pause() {
1141    LOGV("pause");
1142    if (mWriter == NULL) {
1143        return UNKNOWN_ERROR;
1144    }
1145    mWriter->pause();
1146    return OK;
1147}
1148
1149status_t StagefrightRecorder::stop() {
1150    LOGV("stop");
1151    status_t err = OK;
1152    if (mWriter != NULL) {
1153        err = mWriter->stop();
1154        mWriter.clear();
1155    }
1156
1157    if (mCamera != 0) {
1158        LOGV("Disconnect camera");
1159        int64_t token = IPCThreadState::self()->clearCallingIdentity();
1160        if ((mFlags & FLAGS_HOT_CAMERA) == 0) {
1161            LOGV("Camera was cold when we started, stopping preview");
1162            mCamera->stopPreview();
1163        }
1164        mCamera->unlock();
1165        mCamera.clear();
1166        IPCThreadState::self()->restoreCallingIdentity(token);
1167        mFlags = 0;
1168    }
1169
1170    if (mOutputFd >= 0) {
1171        ::close(mOutputFd);
1172        mOutputFd = -1;
1173    }
1174
1175    return err;
1176}
1177
1178status_t StagefrightRecorder::close() {
1179    LOGV("close");
1180    stop();
1181
1182    return OK;
1183}
1184
1185status_t StagefrightRecorder::reset() {
1186    LOGV("reset");
1187    stop();
1188
1189    // No audio or video source by default
1190    mAudioSource = AUDIO_SOURCE_LIST_END;
1191    mVideoSource = VIDEO_SOURCE_LIST_END;
1192
1193    // Default parameters
1194    mOutputFormat  = OUTPUT_FORMAT_THREE_GPP;
1195    mAudioEncoder  = AUDIO_ENCODER_AMR_NB;
1196    mVideoEncoder  = VIDEO_ENCODER_H263;
1197    mVideoWidth    = 176;
1198    mVideoHeight   = 144;
1199    mFrameRate     = 20;
1200    mVideoBitRate  = 192000;
1201    mSampleRate    = 8000;
1202    mAudioChannels = 1;
1203    mAudioBitRate  = 12200;
1204    mInterleaveDurationUs = 0;
1205    mIFramesIntervalSec = 1;
1206    mAudioSourceNode = 0;
1207    mUse64BitFileOffset = false;
1208    mMovieTimeScale  = -1;
1209    mAudioTimeScale  = -1;
1210    mVideoTimeScale  = -1;
1211    mCameraId        = 0;
1212    mVideoEncoderProfile = -1;
1213    mVideoEncoderLevel   = -1;
1214    mMaxFileDurationUs = 0;
1215    mMaxFileSizeBytes = 0;
1216    mTrackEveryTimeDurationUs = 0;
1217    mRotationDegrees = 0;
1218    mEncoderProfiles = MediaProfiles::getInstance();
1219
1220    mOutputFd = -1;
1221    mFlags = 0;
1222
1223    return OK;
1224}
1225
1226status_t StagefrightRecorder::getMaxAmplitude(int *max) {
1227    LOGV("getMaxAmplitude");
1228
1229    if (max == NULL) {
1230        LOGE("Null pointer argument");
1231        return BAD_VALUE;
1232    }
1233
1234    if (mAudioSourceNode != 0) {
1235        *max = mAudioSourceNode->getMaxAmplitude();
1236    } else {
1237        *max = 0;
1238    }
1239
1240    return OK;
1241}
1242
1243status_t StagefrightRecorder::dump(
1244        int fd, const Vector<String16>& args) const {
1245    LOGV("dump");
1246    const size_t SIZE = 256;
1247    char buffer[SIZE];
1248    String8 result;
1249    if (mWriter != 0) {
1250        mWriter->dump(fd, args);
1251    } else {
1252        snprintf(buffer, SIZE, "   No file writer\n");
1253        result.append(buffer);
1254    }
1255    snprintf(buffer, SIZE, "   Recorder: %p\n", this);
1256    snprintf(buffer, SIZE, "   Output file (fd %d):\n", mOutputFd);
1257    result.append(buffer);
1258    snprintf(buffer, SIZE, "     File format: %d\n", mOutputFormat);
1259    result.append(buffer);
1260    snprintf(buffer, SIZE, "     Max file size (bytes): %lld\n", mMaxFileSizeBytes);
1261    result.append(buffer);
1262    snprintf(buffer, SIZE, "     Max file duration (us): %lld\n", mMaxFileDurationUs);
1263    result.append(buffer);
1264    snprintf(buffer, SIZE, "     File offset length (bits): %d\n", mUse64BitFileOffset? 64: 32);
1265    result.append(buffer);
1266    snprintf(buffer, SIZE, "     Interleave duration (us): %d\n", mInterleaveDurationUs);
1267    result.append(buffer);
1268    snprintf(buffer, SIZE, "     Progress notification: %lld us\n", mTrackEveryTimeDurationUs);
1269    result.append(buffer);
1270    snprintf(buffer, SIZE, "   Audio\n");
1271    result.append(buffer);
1272    snprintf(buffer, SIZE, "     Source: %d\n", mAudioSource);
1273    result.append(buffer);
1274    snprintf(buffer, SIZE, "     Encoder: %d\n", mAudioEncoder);
1275    result.append(buffer);
1276    snprintf(buffer, SIZE, "     Bit rate (bps): %d\n", mAudioBitRate);
1277    result.append(buffer);
1278    snprintf(buffer, SIZE, "     Sampling rate (hz): %d\n", mSampleRate);
1279    result.append(buffer);
1280    snprintf(buffer, SIZE, "     Number of channels: %d\n", mAudioChannels);
1281    result.append(buffer);
1282    snprintf(buffer, SIZE, "     Max amplitude: %d\n", mAudioSourceNode == 0? 0: mAudioSourceNode->getMaxAmplitude());
1283    result.append(buffer);
1284    snprintf(buffer, SIZE, "   Video\n");
1285    result.append(buffer);
1286    snprintf(buffer, SIZE, "     Source: %d\n", mVideoSource);
1287    result.append(buffer);
1288    snprintf(buffer, SIZE, "     Camera Id: %d\n", mCameraId);
1289    result.append(buffer);
1290    snprintf(buffer, SIZE, "     Camera flags: %d\n", mFlags);
1291    result.append(buffer);
1292    snprintf(buffer, SIZE, "     Encoder: %d\n", mVideoEncoder);
1293    result.append(buffer);
1294    snprintf(buffer, SIZE, "     Encoder profile: %d\n", mVideoEncoderProfile);
1295    result.append(buffer);
1296    snprintf(buffer, SIZE, "     Encoder level: %d\n", mVideoEncoderLevel);
1297    result.append(buffer);
1298    snprintf(buffer, SIZE, "     I frames interval (s): %d\n", mIFramesIntervalSec);
1299    result.append(buffer);
1300    snprintf(buffer, SIZE, "     Frame size (pixels): %dx%d\n", mVideoWidth, mVideoHeight);
1301    result.append(buffer);
1302    snprintf(buffer, SIZE, "     Frame rate (fps): %d\n", mFrameRate);
1303    result.append(buffer);
1304    snprintf(buffer, SIZE, "     Bit rate (bps): %d\n", mVideoBitRate);
1305    result.append(buffer);
1306    ::write(fd, result.string(), result.size());
1307    return OK;
1308}
1309}  // namespace android
1310