StagefrightRecorder.cpp revision ca2fa61ef03cac008ea86e6fe16b2e5f9f1a2be3 
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/CameraSourceTimeLapse.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 <ctype.h>
42#include <unistd.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    if (mOutputFd >= 0) {
61        ::close(mOutputFd);
62        mOutputFd = -1;
63    }
64}
65
66status_t StagefrightRecorder::init() {
67    LOGV("init");
68    return OK;
69}
70
71status_t StagefrightRecorder::setAudioSource(audio_source as) {
72    LOGV("setAudioSource: %d", as);
73    if (as < AUDIO_SOURCE_DEFAULT ||
74        as >= AUDIO_SOURCE_LIST_END) {
75        LOGE("Invalid audio source: %d", as);
76        return BAD_VALUE;
77    }
78
79    if (as == AUDIO_SOURCE_DEFAULT) {
80        mAudioSource = AUDIO_SOURCE_MIC;
81    } else {
82        mAudioSource = as;
83    }
84
85    return OK;
86}
87
88status_t StagefrightRecorder::setVideoSource(video_source vs) {
89    LOGV("setVideoSource: %d", vs);
90    if (vs < VIDEO_SOURCE_DEFAULT ||
91        vs >= VIDEO_SOURCE_LIST_END) {
92        LOGE("Invalid video source: %d", vs);
93        return BAD_VALUE;
94    }
95
96    if (vs == VIDEO_SOURCE_DEFAULT) {
97        mVideoSource = VIDEO_SOURCE_CAMERA;
98    } else {
99        mVideoSource = vs;
100    }
101
102    return OK;
103}
104
105status_t StagefrightRecorder::setOutputFormat(output_format of) {
106    LOGV("setOutputFormat: %d", of);
107    if (of < OUTPUT_FORMAT_DEFAULT ||
108        of >= OUTPUT_FORMAT_LIST_END) {
109        LOGE("Invalid output format: %d", of);
110        return BAD_VALUE;
111    }
112
113    if (of == OUTPUT_FORMAT_DEFAULT) {
114        mOutputFormat = OUTPUT_FORMAT_THREE_GPP;
115    } else {
116        mOutputFormat = of;
117    }
118
119    return OK;
120}
121
122status_t StagefrightRecorder::setAudioEncoder(audio_encoder ae) {
123    LOGV("setAudioEncoder: %d", ae);
124    if (ae < AUDIO_ENCODER_DEFAULT ||
125        ae >= AUDIO_ENCODER_LIST_END) {
126        LOGE("Invalid audio encoder: %d", ae);
127        return BAD_VALUE;
128    }
129
130    if (ae == AUDIO_ENCODER_DEFAULT) {
131        mAudioEncoder = AUDIO_ENCODER_AMR_NB;
132    } else {
133        mAudioEncoder = ae;
134    }
135
136    return OK;
137}
138
139status_t StagefrightRecorder::setVideoEncoder(video_encoder ve) {
140    LOGV("setVideoEncoder: %d", ve);
141    if (ve < VIDEO_ENCODER_DEFAULT ||
142        ve >= VIDEO_ENCODER_LIST_END) {
143        LOGE("Invalid video encoder: %d", ve);
144        return BAD_VALUE;
145    }
146
147    if (ve == VIDEO_ENCODER_DEFAULT) {
148        mVideoEncoder = VIDEO_ENCODER_H263;
149    } else {
150        mVideoEncoder = ve;
151    }
152
153    return OK;
154}
155
156status_t StagefrightRecorder::setVideoSize(int width, int height) {
157    LOGV("setVideoSize: %dx%d", width, height);
158    if (width <= 0 || height <= 0) {
159        LOGE("Invalid video size: %dx%d", width, height);
160        return BAD_VALUE;
161    }
162
163    // Additional check on the dimension will be performed later
164    mVideoWidth = width;
165    mVideoHeight = height;
166
167    return OK;
168}
169
170status_t StagefrightRecorder::setVideoFrameRate(int frames_per_second) {
171    LOGV("setVideoFrameRate: %d", frames_per_second);
172    if (frames_per_second <= 0 || frames_per_second > 30) {
173        LOGE("Invalid video frame rate: %d", frames_per_second);
174        return BAD_VALUE;
175    }
176
177    // Additional check on the frame rate will be performed later
178    mFrameRate = frames_per_second;
179
180    return OK;
181}
182
183status_t StagefrightRecorder::setCamera(const sp<ICamera> &camera) {
184    LOGV("setCamera");
185    if (camera == 0) {
186        LOGE("camera is NULL");
187        return BAD_VALUE;
188    }
189
190    int64_t token = IPCThreadState::self()->clearCallingIdentity();
191    mFlags &= ~FLAGS_HOT_CAMERA;
192    mCamera = Camera::create(camera);
193    if (mCamera == 0) {
194        LOGE("Unable to connect to camera");
195        IPCThreadState::self()->restoreCallingIdentity(token);
196        return -EBUSY;
197    }
198
199    LOGV("Connected to camera");
200    if (mCamera->previewEnabled()) {
201        LOGV("camera is hot");
202        mFlags |= FLAGS_HOT_CAMERA;
203    }
204    IPCThreadState::self()->restoreCallingIdentity(token);
205
206    return OK;
207}
208
209status_t StagefrightRecorder::setPreviewSurface(const sp<ISurface> &surface) {
210    LOGV("setPreviewSurface: %p", surface.get());
211    mPreviewSurface = surface;
212
213    return OK;
214}
215
216status_t StagefrightRecorder::setOutputFile(const char *path) {
217    LOGE("setOutputFile(const char*) must not be called");
218    // We don't actually support this at all, as the media_server process
219    // no longer has permissions to create files.
220
221    return -EPERM;
222}
223
224status_t StagefrightRecorder::setOutputFile(int fd, int64_t offset, int64_t length) {
225    LOGV("setOutputFile: %d, %lld, %lld", fd, offset, length);
226    // These don't make any sense, do they?
227    CHECK_EQ(offset, 0);
228    CHECK_EQ(length, 0);
229
230    if (fd < 0) {
231        LOGE("Invalid file descriptor: %d", fd);
232        return -EBADF;
233    }
234
235    if (mOutputFd >= 0) {
236        ::close(mOutputFd);
237    }
238    mOutputFd = dup(fd);
239
240    return OK;
241}
242
243// Attempt to parse an int64 literal optionally surrounded by whitespace,
244// returns true on success, false otherwise.
245static bool safe_strtoi64(const char *s, int64_t *val) {
246    char *end;
247    *val = strtoll(s, &end, 10);
248
249    if (end == s || errno == ERANGE) {
250        return false;
251    }
252
253    // Skip trailing whitespace
254    while (isspace(*end)) {
255        ++end;
256    }
257
258    // For a successful return, the string must contain nothing but a valid
259    // int64 literal optionally surrounded by whitespace.
260
261    return *end == '\0';
262}
263
264// Return true if the value is in [0, 0x007FFFFFFF]
265static bool safe_strtoi32(const char *s, int32_t *val) {
266    int64_t temp;
267    if (safe_strtoi64(s, &temp)) {
268        if (temp >= 0 && temp <= 0x007FFFFFFF) {
269            *val = static_cast<int32_t>(temp);
270            return true;
271        }
272    }
273    return false;
274}
275
276// Trim both leading and trailing whitespace from the given string.
277static void TrimString(String8 *s) {
278    size_t num_bytes = s->bytes();
279    const char *data = s->string();
280
281    size_t leading_space = 0;
282    while (leading_space < num_bytes && isspace(data[leading_space])) {
283        ++leading_space;
284    }
285
286    size_t i = num_bytes;
287    while (i > leading_space && isspace(data[i - 1])) {
288        --i;
289    }
290
291    s->setTo(String8(&data[leading_space], i - leading_space));
292}
293
294status_t StagefrightRecorder::setParamAudioSamplingRate(int32_t sampleRate) {
295    LOGV("setParamAudioSamplingRate: %d", sampleRate);
296    if (sampleRate <= 0) {
297        LOGE("Invalid audio sampling rate: %d", sampleRate);
298        return BAD_VALUE;
299    }
300
301    // Additional check on the sample rate will be performed later.
302    mSampleRate = sampleRate;
303    return OK;
304}
305
306status_t StagefrightRecorder::setParamAudioNumberOfChannels(int32_t channels) {
307    LOGV("setParamAudioNumberOfChannels: %d", channels);
308    if (channels <= 0 || channels >= 3) {
309        LOGE("Invalid number of audio channels: %d", channels);
310        return BAD_VALUE;
311    }
312
313    // Additional check on the number of channels will be performed later.
314    mAudioChannels = channels;
315    return OK;
316}
317
318status_t StagefrightRecorder::setParamAudioEncodingBitRate(int32_t bitRate) {
319    LOGV("setParamAudioEncodingBitRate: %d", bitRate);
320    if (bitRate <= 0) {
321        LOGE("Invalid audio encoding bit rate: %d", bitRate);
322        return BAD_VALUE;
323    }
324
325    // The target bit rate may not be exactly the same as the requested.
326    // It depends on many factors, such as rate control, and the bit rate
327    // range that a specific encoder supports. The mismatch between the
328    // the target and requested bit rate will NOT be treated as an error.
329    mAudioBitRate = bitRate;
330    return OK;
331}
332
333status_t StagefrightRecorder::setParamVideoEncodingBitRate(int32_t bitRate) {
334    LOGV("setParamVideoEncodingBitRate: %d", bitRate);
335    if (bitRate <= 0) {
336        LOGE("Invalid video encoding bit rate: %d", bitRate);
337        return BAD_VALUE;
338    }
339
340    // The target bit rate may not be exactly the same as the requested.
341    // It depends on many factors, such as rate control, and the bit rate
342    // range that a specific encoder supports. The mismatch between the
343    // the target and requested bit rate will NOT be treated as an error.
344    mVideoBitRate = bitRate;
345    return OK;
346}
347
348status_t StagefrightRecorder::setParamMaxFileDurationUs(int64_t timeUs) {
349    LOGV("setParamMaxFileDurationUs: %lld us", timeUs);
350    if (timeUs <= 100000LL) {  // XXX: 100 milli-seconds
351        LOGE("Max file duration is too short: %lld us", timeUs);
352        return BAD_VALUE;
353    }
354    mMaxFileDurationUs = timeUs;
355    return OK;
356}
357
358status_t StagefrightRecorder::setParamMaxFileSizeBytes(int64_t bytes) {
359    LOGV("setParamMaxFileSizeBytes: %lld bytes", bytes);
360    if (bytes <= 1024) {  // XXX: 1 kB
361        LOGE("Max file size is too small: %lld bytes", bytes);
362        return BAD_VALUE;
363    }
364    mMaxFileSizeBytes = bytes;
365    return OK;
366}
367
368status_t StagefrightRecorder::setParamInterleaveDuration(int32_t durationUs) {
369    LOGV("setParamInterleaveDuration: %d", durationUs);
370    if (durationUs <= 500000) {           //  500 ms
371        // If interleave duration is too small, it is very inefficient to do
372        // interleaving since the metadata overhead will count for a significant
373        // portion of the saved contents
374        LOGE("Audio/video interleave duration is too small: %d us", durationUs);
375        return BAD_VALUE;
376    } else if (durationUs >= 10000000) {  // 10 seconds
377        // If interleaving duration is too large, it can cause the recording
378        // session to use too much memory since we have to save the output
379        // data before we write them out
380        LOGE("Audio/video interleave duration is too large: %d us", durationUs);
381        return BAD_VALUE;
382    }
383    mInterleaveDurationUs = durationUs;
384    return OK;
385}
386
387// If seconds <  0, only the first frame is I frame, and rest are all P frames
388// If seconds == 0, all frames are encoded as I frames. No P frames
389// If seconds >  0, it is the time spacing (seconds) between 2 neighboring I frames
390status_t StagefrightRecorder::setParamVideoIFramesInterval(int32_t seconds) {
391    LOGV("setParamVideoIFramesInterval: %d seconds", seconds);
392    mIFramesIntervalSec = seconds;
393    return OK;
394}
395
396status_t StagefrightRecorder::setParam64BitFileOffset(bool use64Bit) {
397    LOGV("setParam64BitFileOffset: %s",
398        use64Bit? "use 64 bit file offset": "use 32 bit file offset");
399    mUse64BitFileOffset = use64Bit;
400    return OK;
401}
402
403status_t StagefrightRecorder::setParamVideoCameraId(int32_t cameraId) {
404    LOGV("setParamVideoCameraId: %d", cameraId);
405    if (cameraId < 0) {
406        return BAD_VALUE;
407    }
408    mCameraId = cameraId;
409    return OK;
410}
411
412status_t StagefrightRecorder::setParamTrackTimeStatus(int64_t timeDurationUs) {
413    LOGV("setParamTrackTimeStatus: %lld", timeDurationUs);
414    if (timeDurationUs < 20000) {  // Infeasible if shorter than 20 ms?
415        LOGE("Tracking time duration too short: %lld us", timeDurationUs);
416        return BAD_VALUE;
417    }
418    mTrackEveryTimeDurationUs = timeDurationUs;
419    return OK;
420}
421
422status_t StagefrightRecorder::setParamVideoEncoderProfile(int32_t profile) {
423    LOGV("setParamVideoEncoderProfile: %d", profile);
424
425    // Additional check will be done later when we load the encoder.
426    // For now, we are accepting values defined in OpenMAX IL.
427    mVideoEncoderProfile = profile;
428    return OK;
429}
430
431status_t StagefrightRecorder::setParamVideoEncoderLevel(int32_t level) {
432    LOGV("setParamVideoEncoderLevel: %d", level);
433
434    // Additional check will be done later when we load the encoder.
435    // For now, we are accepting values defined in OpenMAX IL.
436    mVideoEncoderLevel = level;
437    return OK;
438}
439
440status_t StagefrightRecorder::setParamMovieTimeScale(int32_t timeScale) {
441    LOGV("setParamMovieTimeScale: %d", timeScale);
442
443    // The range is set to be the same as the audio's time scale range
444    // since audio's time scale has a wider range.
445    if (timeScale < 600 || timeScale > 96000) {
446        LOGE("Time scale (%d) for movie is out of range [600, 96000]", timeScale);
447        return BAD_VALUE;
448    }
449    mMovieTimeScale = timeScale;
450    return OK;
451}
452
453status_t StagefrightRecorder::setParamVideoTimeScale(int32_t timeScale) {
454    LOGV("setParamVideoTimeScale: %d", timeScale);
455
456    // 60000 is chosen to make sure that each video frame from a 60-fps
457    // video has 1000 ticks.
458    if (timeScale < 600 || timeScale > 60000) {
459        LOGE("Time scale (%d) for video is out of range [600, 60000]", timeScale);
460        return BAD_VALUE;
461    }
462    mVideoTimeScale = timeScale;
463    return OK;
464}
465
466status_t StagefrightRecorder::setParamAudioTimeScale(int32_t timeScale) {
467    LOGV("setParamAudioTimeScale: %d", timeScale);
468
469    // 96000 Hz is the highest sampling rate support in AAC.
470    if (timeScale < 600 || timeScale > 96000) {
471        LOGE("Time scale (%d) for audio is out of range [600, 96000]", timeScale);
472        return BAD_VALUE;
473    }
474    mAudioTimeScale = timeScale;
475    return OK;
476}
477
478status_t StagefrightRecorder::setParamTimeLapseEnable(int32_t timeLapseEnable) {
479    LOGV("setParamTimeLapseEnable: %d", timeLapseEnable);
480
481    if(timeLapseEnable == 0) {
482        mCaptureTimeLapse = false;
483    } else if (timeLapseEnable == 1) {
484        mCaptureTimeLapse = true;
485    } else {
486        return BAD_VALUE;
487    }
488    return OK;
489}
490
491status_t StagefrightRecorder::setParamUseStillCameraForTimeLapse(int32_t useStillCamera) {
492    LOGV("setParamUseStillCameraForTimeLapse: %d", useStillCamera);
493
494    if(useStillCamera == 0) {
495        mUseStillCameraForTimeLapse= false;
496    } else if (useStillCamera == 1) {
497        mUseStillCameraForTimeLapse= true;
498    } else {
499        return BAD_VALUE;
500    }
501    return OK;
502}
503
504status_t StagefrightRecorder::setParamTimeBetweenTimeLapseFrameCapture(int64_t timeUs) {
505    LOGV("setParamTimeBetweenTimeLapseFrameCapture: %lld us", timeUs);
506
507    // Not allowing time more than a day
508    if (timeUs <= 0 || timeUs > 86400*1E6) {
509        LOGE("Time between time lapse frame capture (%lld) is out of range [0, 1 Day]", timeUs);
510        return BAD_VALUE;
511    }
512
513    mTimeBetweenTimeLapseFrameCaptureUs = timeUs;
514    return OK;
515}
516
517status_t StagefrightRecorder::setParameter(
518        const String8 &key, const String8 &value) {
519    LOGV("setParameter: key (%s) => value (%s)", key.string(), value.string());
520    if (key == "max-duration") {
521        int64_t max_duration_ms;
522        if (safe_strtoi64(value.string(), &max_duration_ms)) {
523            return setParamMaxFileDurationUs(1000LL * max_duration_ms);
524        }
525    } else if (key == "max-filesize") {
526        int64_t max_filesize_bytes;
527        if (safe_strtoi64(value.string(), &max_filesize_bytes)) {
528            return setParamMaxFileSizeBytes(max_filesize_bytes);
529        }
530    } else if (key == "interleave-duration-us") {
531        int32_t durationUs;
532        if (safe_strtoi32(value.string(), &durationUs)) {
533            return setParamInterleaveDuration(durationUs);
534        }
535    } else if (key == "param-movie-time-scale") {
536        int32_t timeScale;
537        if (safe_strtoi32(value.string(), &timeScale)) {
538            return setParamMovieTimeScale(timeScale);
539        }
540    } else if (key == "param-use-64bit-offset") {
541        int32_t use64BitOffset;
542        if (safe_strtoi32(value.string(), &use64BitOffset)) {
543            return setParam64BitFileOffset(use64BitOffset != 0);
544        }
545    } else if (key == "param-track-time-status") {
546        int64_t timeDurationUs;
547        if (safe_strtoi64(value.string(), &timeDurationUs)) {
548            return setParamTrackTimeStatus(timeDurationUs);
549        }
550    } else if (key == "audio-param-sampling-rate") {
551        int32_t sampling_rate;
552        if (safe_strtoi32(value.string(), &sampling_rate)) {
553            return setParamAudioSamplingRate(sampling_rate);
554        }
555    } else if (key == "audio-param-number-of-channels") {
556        int32_t number_of_channels;
557        if (safe_strtoi32(value.string(), &number_of_channels)) {
558            return setParamAudioNumberOfChannels(number_of_channels);
559        }
560    } else if (key == "audio-param-encoding-bitrate") {
561        int32_t audio_bitrate;
562        if (safe_strtoi32(value.string(), &audio_bitrate)) {
563            return setParamAudioEncodingBitRate(audio_bitrate);
564        }
565    } else if (key == "audio-param-time-scale") {
566        int32_t timeScale;
567        if (safe_strtoi32(value.string(), &timeScale)) {
568            return setParamAudioTimeScale(timeScale);
569        }
570    } else if (key == "video-param-encoding-bitrate") {
571        int32_t video_bitrate;
572        if (safe_strtoi32(value.string(), &video_bitrate)) {
573            return setParamVideoEncodingBitRate(video_bitrate);
574        }
575    } else if (key == "video-param-i-frames-interval") {
576        int32_t seconds;
577        if (safe_strtoi32(value.string(), &seconds)) {
578            return setParamVideoIFramesInterval(seconds);
579        }
580    } else if (key == "video-param-encoder-profile") {
581        int32_t profile;
582        if (safe_strtoi32(value.string(), &profile)) {
583            return setParamVideoEncoderProfile(profile);
584        }
585    } else if (key == "video-param-encoder-level") {
586        int32_t level;
587        if (safe_strtoi32(value.string(), &level)) {
588            return setParamVideoEncoderLevel(level);
589        }
590    } else if (key == "video-param-camera-id") {
591        int32_t cameraId;
592        if (safe_strtoi32(value.string(), &cameraId)) {
593            return setParamVideoCameraId(cameraId);
594        }
595    } else if (key == "video-param-time-scale") {
596        int32_t timeScale;
597        if (safe_strtoi32(value.string(), &timeScale)) {
598            return setParamVideoTimeScale(timeScale);
599        }
600    } else if (key == "time-lapse-enable") {
601        int32_t timeLapseEnable;
602        if (safe_strtoi32(value.string(), &timeLapseEnable)) {
603            return setParamTimeLapseEnable(timeLapseEnable);
604        }
605    } else if (key == "use-still-camera-for-time-lapse") {
606        int32_t useStillCamera;
607        if (safe_strtoi32(value.string(), &useStillCamera)) {
608            return setParamUseStillCameraForTimeLapse(useStillCamera);
609        }
610    } else if (key == "time-between-time-lapse-frame-capture") {
611        int64_t timeBetweenTimeLapseFrameCaptureMs;
612        if (safe_strtoi64(value.string(), &timeBetweenTimeLapseFrameCaptureMs)) {
613            return setParamTimeBetweenTimeLapseFrameCapture(
614                    1000LL * timeBetweenTimeLapseFrameCaptureMs);
615        }
616    } else {
617        LOGE("setParameter: failed to find key %s", key.string());
618    }
619    return BAD_VALUE;
620}
621
622status_t StagefrightRecorder::setParameters(const String8 &params) {
623    LOGV("setParameters: %s", params.string());
624    const char *cparams = params.string();
625    const char *key_start = cparams;
626    for (;;) {
627        const char *equal_pos = strchr(key_start, '=');
628        if (equal_pos == NULL) {
629            LOGE("Parameters %s miss a value", cparams);
630            return BAD_VALUE;
631        }
632        String8 key(key_start, equal_pos - key_start);
633        TrimString(&key);
634        if (key.length() == 0) {
635            LOGE("Parameters %s contains an empty key", cparams);
636            return BAD_VALUE;
637        }
638        const char *value_start = equal_pos + 1;
639        const char *semicolon_pos = strchr(value_start, ';');
640        String8 value;
641        if (semicolon_pos == NULL) {
642            value.setTo(value_start);
643        } else {
644            value.setTo(value_start, semicolon_pos - value_start);
645        }
646        if (setParameter(key, value) != OK) {
647            return BAD_VALUE;
648        }
649        if (semicolon_pos == NULL) {
650            break;  // Reaches the end
651        }
652        key_start = semicolon_pos + 1;
653    }
654    return OK;
655}
656
657status_t StagefrightRecorder::setListener(const sp<IMediaRecorderClient> &listener) {
658    mListener = listener;
659
660    return OK;
661}
662
663status_t StagefrightRecorder::prepare() {
664    return OK;
665}
666
667status_t StagefrightRecorder::start() {
668    CHECK(mOutputFd >= 0);
669
670    if (mWriter != NULL) {
671        LOGE("File writer is not avaialble");
672        return UNKNOWN_ERROR;
673    }
674
675    switch (mOutputFormat) {
676        case OUTPUT_FORMAT_DEFAULT:
677        case OUTPUT_FORMAT_THREE_GPP:
678        case OUTPUT_FORMAT_MPEG_4:
679            return startMPEG4Recording();
680
681        case OUTPUT_FORMAT_AMR_NB:
682        case OUTPUT_FORMAT_AMR_WB:
683            return startAMRRecording();
684
685        case OUTPUT_FORMAT_AAC_ADIF:
686        case OUTPUT_FORMAT_AAC_ADTS:
687            return startAACRecording();
688
689        case OUTPUT_FORMAT_RTP_AVP:
690            return startRTPRecording();
691
692        default:
693            LOGE("Unsupported output file format: %d", mOutputFormat);
694            return UNKNOWN_ERROR;
695    }
696}
697
698sp<MediaSource> StagefrightRecorder::createAudioSource() {
699    sp<AudioSource> audioSource =
700        new AudioSource(
701                mAudioSource,
702                mSampleRate,
703                mAudioChannels);
704
705    status_t err = audioSource->initCheck();
706
707    if (err != OK) {
708        LOGE("audio source is not initialized");
709        return NULL;
710    }
711
712    sp<MetaData> encMeta = new MetaData;
713    const char *mime;
714    switch (mAudioEncoder) {
715        case AUDIO_ENCODER_AMR_NB:
716        case AUDIO_ENCODER_DEFAULT:
717            mime = MEDIA_MIMETYPE_AUDIO_AMR_NB;
718            break;
719        case AUDIO_ENCODER_AMR_WB:
720            mime = MEDIA_MIMETYPE_AUDIO_AMR_WB;
721            break;
722        case AUDIO_ENCODER_AAC:
723            mime = MEDIA_MIMETYPE_AUDIO_AAC;
724            break;
725        default:
726            LOGE("Unknown audio encoder: %d", mAudioEncoder);
727            return NULL;
728    }
729    encMeta->setCString(kKeyMIMEType, mime);
730
731    int32_t maxInputSize;
732    CHECK(audioSource->getFormat()->findInt32(
733                kKeyMaxInputSize, &maxInputSize));
734
735    encMeta->setInt32(kKeyMaxInputSize, maxInputSize);
736    encMeta->setInt32(kKeyChannelCount, mAudioChannels);
737    encMeta->setInt32(kKeySampleRate, mSampleRate);
738    encMeta->setInt32(kKeyBitRate, mAudioBitRate);
739    encMeta->setInt32(kKeyTimeScale, mAudioTimeScale);
740
741    OMXClient client;
742    CHECK_EQ(client.connect(), OK);
743
744    sp<MediaSource> audioEncoder =
745        OMXCodec::Create(client.interface(), encMeta,
746                         true /* createEncoder */, audioSource);
747    mAudioSourceNode = audioSource;
748
749    return audioEncoder;
750}
751
752status_t StagefrightRecorder::startAACRecording() {
753    CHECK(mOutputFormat == OUTPUT_FORMAT_AAC_ADIF ||
754          mOutputFormat == OUTPUT_FORMAT_AAC_ADTS);
755
756    CHECK(mAudioEncoder == AUDIO_ENCODER_AAC);
757    CHECK(mAudioSource != AUDIO_SOURCE_LIST_END);
758
759    CHECK(0 == "AACWriter is not implemented yet");
760
761    return OK;
762}
763
764status_t StagefrightRecorder::startAMRRecording() {
765    CHECK(mOutputFormat == OUTPUT_FORMAT_AMR_NB ||
766          mOutputFormat == OUTPUT_FORMAT_AMR_WB);
767
768    if (mOutputFormat == OUTPUT_FORMAT_AMR_NB) {
769        if (mAudioEncoder != AUDIO_ENCODER_DEFAULT &&
770            mAudioEncoder != AUDIO_ENCODER_AMR_NB) {
771            LOGE("Invalid encoder %d used for AMRNB recording",
772                    mAudioEncoder);
773            return BAD_VALUE;
774        }
775        if (mSampleRate != 8000) {
776            LOGE("Invalid sampling rate %d used for AMRNB recording",
777                    mSampleRate);
778            return BAD_VALUE;
779        }
780    } else {  // mOutputFormat must be OUTPUT_FORMAT_AMR_WB
781        if (mAudioEncoder != AUDIO_ENCODER_AMR_WB) {
782            LOGE("Invlaid encoder %d used for AMRWB recording",
783                    mAudioEncoder);
784            return BAD_VALUE;
785        }
786        if (mSampleRate != 16000) {
787            LOGE("Invalid sample rate %d used for AMRWB recording",
788                    mSampleRate);
789            return BAD_VALUE;
790        }
791    }
792    if (mAudioChannels != 1) {
793        LOGE("Invalid number of audio channels %d used for amr recording",
794                mAudioChannels);
795        return BAD_VALUE;
796    }
797
798    if (mAudioSource >= AUDIO_SOURCE_LIST_END) {
799        LOGE("Invalid audio source: %d", mAudioSource);
800        return BAD_VALUE;
801    }
802
803    sp<MediaSource> audioEncoder = createAudioSource();
804
805    if (audioEncoder == NULL) {
806        return UNKNOWN_ERROR;
807    }
808
809    mWriter = new AMRWriter(dup(mOutputFd));
810    mWriter->addSource(audioEncoder);
811
812    if (mMaxFileDurationUs != 0) {
813        mWriter->setMaxFileDuration(mMaxFileDurationUs);
814    }
815    if (mMaxFileSizeBytes != 0) {
816        mWriter->setMaxFileSize(mMaxFileSizeBytes);
817    }
818    mWriter->setListener(mListener);
819    mWriter->start();
820
821    return OK;
822}
823
824status_t StagefrightRecorder::startRTPRecording() {
825    CHECK_EQ(mOutputFormat, OUTPUT_FORMAT_RTP_AVP);
826
827    if ((mAudioSource != AUDIO_SOURCE_LIST_END
828                && mVideoSource != VIDEO_SOURCE_LIST_END)
829            || (mAudioSource == AUDIO_SOURCE_LIST_END
830                && mVideoSource == VIDEO_SOURCE_LIST_END)) {
831        // Must have exactly one source.
832        return BAD_VALUE;
833    }
834
835    if (mOutputFd < 0) {
836        return BAD_VALUE;
837    }
838
839    sp<MediaSource> source;
840
841    if (mAudioSource != AUDIO_SOURCE_LIST_END) {
842        source = createAudioSource();
843    } else {
844        status_t err = setupVideoEncoder(&source);
845        if (err != OK) {
846            return err;
847        }
848    }
849
850    mWriter = new ARTPWriter(dup(mOutputFd));
851    mWriter->addSource(source);
852    mWriter->setListener(mListener);
853
854    return mWriter->start();
855}
856
857void StagefrightRecorder::clipVideoFrameRate() {
858    LOGV("clipVideoFrameRate: encoder %d", mVideoEncoder);
859    int minFrameRate = mEncoderProfiles->getVideoEncoderParamByName(
860                        "enc.vid.fps.min", mVideoEncoder);
861    int maxFrameRate = mEncoderProfiles->getVideoEncoderParamByName(
862                        "enc.vid.fps.max", mVideoEncoder);
863    if (mFrameRate < minFrameRate) {
864        LOGW("Intended video encoding frame rate (%d fps) is too small"
865             " and will be set to (%d fps)", mFrameRate, minFrameRate);
866        mFrameRate = minFrameRate;
867    } else if (mFrameRate > maxFrameRate) {
868        LOGW("Intended video encoding frame rate (%d fps) is too large"
869             " and will be set to (%d fps)", mFrameRate, maxFrameRate);
870        mFrameRate = maxFrameRate;
871    }
872}
873
874void StagefrightRecorder::clipVideoBitRate() {
875    LOGV("clipVideoBitRate: encoder %d", mVideoEncoder);
876    int minBitRate = mEncoderProfiles->getVideoEncoderParamByName(
877                        "enc.vid.bps.min", mVideoEncoder);
878    int maxBitRate = mEncoderProfiles->getVideoEncoderParamByName(
879                        "enc.vid.bps.max", mVideoEncoder);
880    if (mVideoBitRate < minBitRate) {
881        LOGW("Intended video encoding bit rate (%d bps) is too small"
882             " and will be set to (%d bps)", mVideoBitRate, minBitRate);
883        mVideoBitRate = minBitRate;
884    } else if (mVideoBitRate > maxBitRate) {
885        LOGW("Intended video encoding bit rate (%d bps) is too large"
886             " and will be set to (%d bps)", mVideoBitRate, maxBitRate);
887        mVideoBitRate = maxBitRate;
888    }
889}
890
891void StagefrightRecorder::clipVideoFrameWidth() {
892    LOGV("clipVideoFrameWidth: encoder %d", mVideoEncoder);
893    int minFrameWidth = mEncoderProfiles->getVideoEncoderParamByName(
894                        "enc.vid.width.min", mVideoEncoder);
895    int maxFrameWidth = mEncoderProfiles->getVideoEncoderParamByName(
896                        "enc.vid.width.max", mVideoEncoder);
897    if (mVideoWidth < minFrameWidth) {
898        LOGW("Intended video encoding frame width (%d) is too small"
899             " and will be set to (%d)", mVideoWidth, minFrameWidth);
900        mVideoWidth = minFrameWidth;
901    } else if (mVideoWidth > maxFrameWidth) {
902        LOGW("Intended video encoding frame width (%d) is too large"
903             " and will be set to (%d)", mVideoWidth, maxFrameWidth);
904        mVideoWidth = maxFrameWidth;
905    }
906}
907
908status_t StagefrightRecorder::setupCameraSource() {
909    if (!mCaptureTimeLapse) {
910        // Dont clip for time lapse capture as encoder will have enough
911        // time to encode because of slow capture rate of time lapse.
912        clipVideoBitRate();
913        clipVideoFrameRate();
914        clipVideoFrameWidth();
915        clipVideoFrameHeight();
916    }
917
918    int64_t token = IPCThreadState::self()->clearCallingIdentity();
919    if (mCamera == 0) {
920        mCamera = Camera::connect(mCameraId);
921        if (mCamera == 0) {
922            LOGE("Camera connection could not be established.");
923            return -EBUSY;
924        }
925        mFlags &= ~FLAGS_HOT_CAMERA;
926        mCamera->lock();
927    }
928
929    // Set the actual video recording frame size
930    CameraParameters params(mCamera->getParameters());
931
932    // dont change the preview size when using still camera for time lapse
933    // as mVideoWidth, mVideoHeight may correspond to HD resolution not
934    // supported by the video camera.
935    if (!(mCaptureTimeLapse && mUseStillCameraForTimeLapse)) {
936        params.setPreviewSize(mVideoWidth, mVideoHeight);
937    }
938
939    params.setPreviewFrameRate(mFrameRate);
940    String8 s = params.flatten();
941    if (OK != mCamera->setParameters(s)) {
942        LOGE("Could not change settings."
943             " Someone else is using camera %d?", mCameraId);
944        return -EBUSY;
945    }
946    CameraParameters newCameraParams(mCamera->getParameters());
947
948    // Check on video frame size
949    int frameWidth = 0, frameHeight = 0;
950    newCameraParams.getPreviewSize(&frameWidth, &frameHeight);
951    if (!(mCaptureTimeLapse && mUseStillCameraForTimeLapse) &&
952        (frameWidth  < 0 || frameWidth  != mVideoWidth ||
953        frameHeight < 0 || frameHeight != mVideoHeight)) {
954        LOGE("Failed to set the video frame size to %dx%d",
955                mVideoWidth, mVideoHeight);
956        IPCThreadState::self()->restoreCallingIdentity(token);
957        return UNKNOWN_ERROR;
958    }
959
960    // Check on video frame rate
961    int frameRate = newCameraParams.getPreviewFrameRate();
962    if (frameRate < 0 || (frameRate - mFrameRate) != 0) {
963        LOGE("Failed to set frame rate to %d fps. The actual "
964             "frame rate is %d", mFrameRate, frameRate);
965    }
966
967    // This CHECK is good, since we just passed the lock/unlock
968    // check earlier by calling mCamera->setParameters().
969    CHECK_EQ(OK, mCamera->setPreviewDisplay(mPreviewSurface));
970    IPCThreadState::self()->restoreCallingIdentity(token);
971    return OK;
972}
973
974void StagefrightRecorder::clipVideoFrameHeight() {
975    LOGV("clipVideoFrameHeight: encoder %d", mVideoEncoder);
976    int minFrameHeight = mEncoderProfiles->getVideoEncoderParamByName(
977                        "enc.vid.height.min", mVideoEncoder);
978    int maxFrameHeight = mEncoderProfiles->getVideoEncoderParamByName(
979                        "enc.vid.height.max", mVideoEncoder);
980    if (mVideoHeight < minFrameHeight) {
981        LOGW("Intended video encoding frame height (%d) is too small"
982             " and will be set to (%d)", mVideoHeight, minFrameHeight);
983        mVideoHeight = minFrameHeight;
984    } else if (mVideoHeight > maxFrameHeight) {
985        LOGW("Intended video encoding frame height (%d) is too large"
986             " and will be set to (%d)", mVideoHeight, maxFrameHeight);
987        mVideoHeight = maxFrameHeight;
988    }
989}
990
991status_t StagefrightRecorder::setupVideoEncoder(sp<MediaSource> *source) {
992    source->clear();
993
994    status_t err = setupCameraSource();
995    if (err != OK) return err;
996
997    sp<CameraSource> cameraSource = (mCaptureTimeLapse) ?
998        CameraSourceTimeLapse::CreateFromCamera(mCamera, mUseStillCameraForTimeLapse,
999                mTimeBetweenTimeLapseFrameCaptureUs, mVideoWidth, mVideoHeight, mFrameRate):
1000        CameraSource::CreateFromCamera(mCamera);
1001    CHECK(cameraSource != NULL);
1002
1003    sp<MetaData> enc_meta = new MetaData;
1004    enc_meta->setInt32(kKeyBitRate, mVideoBitRate);
1005    enc_meta->setInt32(kKeySampleRate, mFrameRate);
1006
1007    switch (mVideoEncoder) {
1008        case VIDEO_ENCODER_H263:
1009            enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_H263);
1010            break;
1011
1012        case VIDEO_ENCODER_MPEG_4_SP:
1013            enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_MPEG4);
1014            break;
1015
1016        case VIDEO_ENCODER_H264:
1017            enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_AVC);
1018            break;
1019
1020        default:
1021            CHECK(!"Should not be here, unsupported video encoding.");
1022            break;
1023    }
1024
1025    sp<MetaData> meta = cameraSource->getFormat();
1026
1027    int32_t width, height, stride, sliceHeight, colorFormat;
1028    CHECK(meta->findInt32(kKeyWidth, &width));
1029    CHECK(meta->findInt32(kKeyHeight, &height));
1030    CHECK(meta->findInt32(kKeyStride, &stride));
1031    CHECK(meta->findInt32(kKeySliceHeight, &sliceHeight));
1032    CHECK(meta->findInt32(kKeyColorFormat, &colorFormat));
1033
1034    enc_meta->setInt32(kKeyWidth, width);
1035    enc_meta->setInt32(kKeyHeight, height);
1036    enc_meta->setInt32(kKeyIFramesInterval, mIFramesIntervalSec);
1037    enc_meta->setInt32(kKeyStride, stride);
1038    enc_meta->setInt32(kKeySliceHeight, sliceHeight);
1039    enc_meta->setInt32(kKeyColorFormat, colorFormat);
1040    enc_meta->setInt32(kKeyTimeScale, mVideoTimeScale);
1041    if (mVideoEncoderProfile != -1) {
1042        enc_meta->setInt32(kKeyVideoProfile, mVideoEncoderProfile);
1043    }
1044    if (mVideoEncoderLevel != -1) {
1045        enc_meta->setInt32(kKeyVideoLevel, mVideoEncoderLevel);
1046    }
1047
1048    OMXClient client;
1049    CHECK_EQ(client.connect(), OK);
1050
1051    // Use software codec for time lapse
1052    uint32_t encoder_flags = (mCaptureTimeLapse) ? OMXCodec::kPreferSoftwareCodecs : 0;
1053    sp<MediaSource> encoder = OMXCodec::Create(
1054            client.interface(), enc_meta,
1055            true /* createEncoder */, cameraSource,
1056            NULL, encoder_flags);
1057    if (encoder == NULL) {
1058        return UNKNOWN_ERROR;
1059    }
1060
1061    *source = encoder;
1062
1063    return OK;
1064}
1065
1066status_t StagefrightRecorder::setupAudioEncoder(const sp<MediaWriter>& writer) {
1067    sp<MediaSource> audioEncoder;
1068    switch(mAudioEncoder) {
1069        case AUDIO_ENCODER_AMR_NB:
1070        case AUDIO_ENCODER_AMR_WB:
1071        case AUDIO_ENCODER_AAC:
1072            audioEncoder = createAudioSource();
1073            break;
1074        default:
1075            LOGE("Unsupported audio encoder: %d", mAudioEncoder);
1076            return UNKNOWN_ERROR;
1077    }
1078
1079    if (audioEncoder == NULL) {
1080        return UNKNOWN_ERROR;
1081    }
1082
1083    writer->addSource(audioEncoder);
1084    return OK;
1085}
1086
1087status_t StagefrightRecorder::startMPEG4Recording() {
1088    int32_t totalBitRate = 0;
1089    status_t err = OK;
1090    sp<MediaWriter> writer = new MPEG4Writer(dup(mOutputFd));
1091
1092    // Add audio source first if it exists
1093    if (!mCaptureTimeLapse && (mAudioSource != AUDIO_SOURCE_LIST_END)) {
1094        err = setupAudioEncoder(writer);
1095        if (err != OK) return err;
1096        totalBitRate += mAudioBitRate;
1097    }
1098    if (mVideoSource == VIDEO_SOURCE_DEFAULT
1099            || mVideoSource == VIDEO_SOURCE_CAMERA) {
1100        sp<MediaSource> encoder;
1101        err = setupVideoEncoder(&encoder);
1102        if (err != OK) return err;
1103        writer->addSource(encoder);
1104        totalBitRate += mVideoBitRate;
1105    }
1106
1107    if (mInterleaveDurationUs > 0) {
1108        reinterpret_cast<MPEG4Writer *>(writer.get())->
1109            setInterleaveDuration(mInterleaveDurationUs);
1110    }
1111
1112    if (mMaxFileDurationUs != 0) {
1113        writer->setMaxFileDuration(mMaxFileDurationUs);
1114    }
1115    if (mMaxFileSizeBytes != 0) {
1116        writer->setMaxFileSize(mMaxFileSizeBytes);
1117    }
1118    sp<MetaData> meta = new MetaData;
1119    meta->setInt64(kKeyTime, systemTime() / 1000);
1120    meta->setInt32(kKeyFileType, mOutputFormat);
1121    meta->setInt32(kKeyBitRate, totalBitRate);
1122    meta->setInt32(kKey64BitFileOffset, mUse64BitFileOffset);
1123    meta->setInt32(kKeyTimeScale, mMovieTimeScale);
1124    if (mTrackEveryTimeDurationUs > 0) {
1125        meta->setInt64(kKeyTrackTimeStatus, mTrackEveryTimeDurationUs);
1126    }
1127    writer->setListener(mListener);
1128    mWriter = writer;
1129    return mWriter->start(meta.get());
1130}
1131
1132status_t StagefrightRecorder::pause() {
1133    LOGV("pause");
1134    if (mWriter == NULL) {
1135        return UNKNOWN_ERROR;
1136    }
1137    mWriter->pause();
1138    return OK;
1139}
1140
1141status_t StagefrightRecorder::stop() {
1142    LOGV("stop");
1143    if (mWriter != NULL) {
1144        mWriter->stop();
1145        mWriter.clear();
1146    }
1147
1148    if (mCamera != 0) {
1149        LOGV("Disconnect camera");
1150        int64_t token = IPCThreadState::self()->clearCallingIdentity();
1151        if ((mFlags & FLAGS_HOT_CAMERA) == 0) {
1152            LOGV("Camera was cold when we started, stopping preview");
1153            mCamera->stopPreview();
1154        }
1155        mCamera->unlock();
1156        mCamera.clear();
1157        IPCThreadState::self()->restoreCallingIdentity(token);
1158        mFlags = 0;
1159    }
1160
1161    return OK;
1162}
1163
1164status_t StagefrightRecorder::close() {
1165    LOGV("close");
1166    stop();
1167
1168    return OK;
1169}
1170
1171status_t StagefrightRecorder::reset() {
1172    LOGV("reset");
1173    stop();
1174
1175    // No audio or video source by default
1176    mAudioSource = AUDIO_SOURCE_LIST_END;
1177    mVideoSource = VIDEO_SOURCE_LIST_END;
1178
1179    // Default parameters
1180    mOutputFormat  = OUTPUT_FORMAT_THREE_GPP;
1181    mAudioEncoder  = AUDIO_ENCODER_AMR_NB;
1182    mVideoEncoder  = VIDEO_ENCODER_H263;
1183    mVideoWidth    = 176;
1184    mVideoHeight   = 144;
1185    mFrameRate     = 20;
1186    mVideoBitRate  = 192000;
1187    mSampleRate    = 8000;
1188    mAudioChannels = 1;
1189    mAudioBitRate  = 12200;
1190    mInterleaveDurationUs = 0;
1191    mIFramesIntervalSec = 1;
1192    mAudioSourceNode = 0;
1193    mUse64BitFileOffset = false;
1194    mMovieTimeScale  = 1000;
1195    mAudioTimeScale  = 1000;
1196    mVideoTimeScale  = 1000;
1197    mCameraId        = 0;
1198    mVideoEncoderProfile = -1;
1199    mVideoEncoderLevel   = -1;
1200    mMaxFileDurationUs = 0;
1201    mMaxFileSizeBytes = 0;
1202    mTrackEveryTimeDurationUs = 0;
1203    mCaptureTimeLapse = false;
1204    mUseStillCameraForTimeLapse = true;
1205    mTimeBetweenTimeLapseFrameCaptureUs = -1;
1206    mEncoderProfiles = MediaProfiles::getInstance();
1207
1208    mOutputFd = -1;
1209    mFlags = 0;
1210
1211    return OK;
1212}
1213
1214status_t StagefrightRecorder::getMaxAmplitude(int *max) {
1215    LOGV("getMaxAmplitude");
1216
1217    if (max == NULL) {
1218        LOGE("Null pointer argument");
1219        return BAD_VALUE;
1220    }
1221
1222    if (mAudioSourceNode != 0) {
1223        *max = mAudioSourceNode->getMaxAmplitude();
1224    } else {
1225        *max = 0;
1226    }
1227
1228    return OK;
1229}
1230
1231status_t StagefrightRecorder::dump(int fd, const Vector<String16>& args) const {
1232    const size_t SIZE = 256;
1233    char buffer[SIZE];
1234    String8 result;
1235    snprintf(buffer, SIZE, "   Recorder: %p", this);
1236    snprintf(buffer, SIZE, "   Output file (fd %d):\n", mOutputFd);
1237    result.append(buffer);
1238    snprintf(buffer, SIZE, "     File format: %d\n", mOutputFormat);
1239    result.append(buffer);
1240    snprintf(buffer, SIZE, "     Max file size (bytes): %lld\n", mMaxFileSizeBytes);
1241    result.append(buffer);
1242    snprintf(buffer, SIZE, "     Max file duration (us): %lld\n", mMaxFileDurationUs);
1243    result.append(buffer);
1244    snprintf(buffer, SIZE, "     File offset length (bits): %d\n", mUse64BitFileOffset? 64: 32);
1245    result.append(buffer);
1246    snprintf(buffer, SIZE, "     Interleave duration (us): %d\n", mInterleaveDurationUs);
1247    result.append(buffer);
1248    snprintf(buffer, SIZE, "     Progress notification: %lld us\n", mTrackEveryTimeDurationUs);
1249    result.append(buffer);
1250    snprintf(buffer, SIZE, "   Audio\n");
1251    result.append(buffer);
1252    snprintf(buffer, SIZE, "     Source: %d\n", mAudioSource);
1253    result.append(buffer);
1254    snprintf(buffer, SIZE, "     Encoder: %d\n", mAudioEncoder);
1255    result.append(buffer);
1256    snprintf(buffer, SIZE, "     Bit rate (bps): %d\n", mAudioBitRate);
1257    result.append(buffer);
1258    snprintf(buffer, SIZE, "     Sampling rate (hz): %d\n", mSampleRate);
1259    result.append(buffer);
1260    snprintf(buffer, SIZE, "     Number of channels: %d\n", mAudioChannels);
1261    result.append(buffer);
1262    snprintf(buffer, SIZE, "     Max amplitude: %d\n", mAudioSourceNode == 0? 0: mAudioSourceNode->getMaxAmplitude());
1263    result.append(buffer);
1264    snprintf(buffer, SIZE, "   Video\n");
1265    result.append(buffer);
1266    snprintf(buffer, SIZE, "     Source: %d\n", mVideoSource);
1267    result.append(buffer);
1268    snprintf(buffer, SIZE, "     Camera Id: %d\n", mCameraId);
1269    result.append(buffer);
1270    snprintf(buffer, SIZE, "     Camera flags: %d\n", mFlags);
1271    result.append(buffer);
1272    snprintf(buffer, SIZE, "     Encoder: %d\n", mVideoEncoder);
1273    result.append(buffer);
1274    snprintf(buffer, SIZE, "     Encoder profile: %d\n", mVideoEncoderProfile);
1275    result.append(buffer);
1276    snprintf(buffer, SIZE, "     Encoder level: %d\n", mVideoEncoderLevel);
1277    result.append(buffer);
1278    snprintf(buffer, SIZE, "     I frames interval (s): %d\n", mIFramesIntervalSec);
1279    result.append(buffer);
1280    snprintf(buffer, SIZE, "     Frame size (pixels): %dx%d\n", mVideoWidth, mVideoHeight);
1281    result.append(buffer);
1282    snprintf(buffer, SIZE, "     Frame rate (fps): %d\n", mFrameRate);
1283    result.append(buffer);
1284    snprintf(buffer, SIZE, "     Bit rate (bps): %d\n", mVideoBitRate);
1285    result.append(buffer);
1286    ::write(fd, result.string(), result.size());
1287    return OK;
1288}
1289}  // namespace android
1290