StagefrightRecorder.cpp revision aca1fe35480ae76dd6bae167ade40adc955e2d0d 
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    mMaxFileDurationUs = timeUs;
365    return OK;
366}
367
368status_t StagefrightRecorder::setParamMaxFileSizeBytes(int64_t bytes) {
369    LOGV("setParamMaxFileSizeBytes: %lld bytes", bytes);
370    if (bytes <= 1024) {  // XXX: 1 kB
371        LOGE("Max file size is too small: %lld bytes", bytes);
372        return BAD_VALUE;
373    }
374    mMaxFileSizeBytes = bytes;
375    return OK;
376}
377
378status_t StagefrightRecorder::setParamInterleaveDuration(int32_t durationUs) {
379    LOGV("setParamInterleaveDuration: %d", durationUs);
380    if (durationUs <= 500000) {           //  500 ms
381        // If interleave duration is too small, it is very inefficient to do
382        // interleaving since the metadata overhead will count for a significant
383        // portion of the saved contents
384        LOGE("Audio/video interleave duration is too small: %d us", durationUs);
385        return BAD_VALUE;
386    } else if (durationUs >= 10000000) {  // 10 seconds
387        // If interleaving duration is too large, it can cause the recording
388        // session to use too much memory since we have to save the output
389        // data before we write them out
390        LOGE("Audio/video interleave duration is too large: %d us", durationUs);
391        return BAD_VALUE;
392    }
393    mInterleaveDurationUs = durationUs;
394    return OK;
395}
396
397// If seconds <  0, only the first frame is I frame, and rest are all P frames
398// If seconds == 0, all frames are encoded as I frames. No P frames
399// If seconds >  0, it is the time spacing (seconds) between 2 neighboring I frames
400status_t StagefrightRecorder::setParamVideoIFramesInterval(int32_t seconds) {
401    LOGV("setParamVideoIFramesInterval: %d seconds", seconds);
402    mIFramesIntervalSec = seconds;
403    return OK;
404}
405
406status_t StagefrightRecorder::setParam64BitFileOffset(bool use64Bit) {
407    LOGV("setParam64BitFileOffset: %s",
408        use64Bit? "use 64 bit file offset": "use 32 bit file offset");
409    mUse64BitFileOffset = use64Bit;
410    return OK;
411}
412
413status_t StagefrightRecorder::setParamVideoCameraId(int32_t cameraId) {
414    LOGV("setParamVideoCameraId: %d", cameraId);
415    if (cameraId < 0) {
416        return BAD_VALUE;
417    }
418    mCameraId = cameraId;
419    return OK;
420}
421
422status_t StagefrightRecorder::setParamTrackTimeStatus(int64_t timeDurationUs) {
423    LOGV("setParamTrackTimeStatus: %lld", timeDurationUs);
424    if (timeDurationUs < 20000) {  // Infeasible if shorter than 20 ms?
425        LOGE("Tracking time duration too short: %lld us", timeDurationUs);
426        return BAD_VALUE;
427    }
428    mTrackEveryTimeDurationUs = timeDurationUs;
429    return OK;
430}
431
432status_t StagefrightRecorder::setParamVideoEncoderProfile(int32_t profile) {
433    LOGV("setParamVideoEncoderProfile: %d", profile);
434
435    // Additional check will be done later when we load the encoder.
436    // For now, we are accepting values defined in OpenMAX IL.
437    mVideoEncoderProfile = profile;
438    return OK;
439}
440
441status_t StagefrightRecorder::setParamVideoEncoderLevel(int32_t level) {
442    LOGV("setParamVideoEncoderLevel: %d", level);
443
444    // Additional check will be done later when we load the encoder.
445    // For now, we are accepting values defined in OpenMAX IL.
446    mVideoEncoderLevel = level;
447    return OK;
448}
449
450status_t StagefrightRecorder::setParamMovieTimeScale(int32_t timeScale) {
451    LOGV("setParamMovieTimeScale: %d", timeScale);
452
453    // The range is set to be the same as the audio's time scale range
454    // since audio's time scale has a wider range.
455    if (timeScale < 600 || timeScale > 96000) {
456        LOGE("Time scale (%d) for movie is out of range [600, 96000]", timeScale);
457        return BAD_VALUE;
458    }
459    mMovieTimeScale = timeScale;
460    return OK;
461}
462
463status_t StagefrightRecorder::setParamVideoTimeScale(int32_t timeScale) {
464    LOGV("setParamVideoTimeScale: %d", timeScale);
465
466    // 60000 is chosen to make sure that each video frame from a 60-fps
467    // video has 1000 ticks.
468    if (timeScale < 600 || timeScale > 60000) {
469        LOGE("Time scale (%d) for video is out of range [600, 60000]", timeScale);
470        return BAD_VALUE;
471    }
472    mVideoTimeScale = timeScale;
473    return OK;
474}
475
476status_t StagefrightRecorder::setParamAudioTimeScale(int32_t timeScale) {
477    LOGV("setParamAudioTimeScale: %d", timeScale);
478
479    // 96000 Hz is the highest sampling rate support in AAC.
480    if (timeScale < 600 || timeScale > 96000) {
481        LOGE("Time scale (%d) for audio is out of range [600, 96000]", timeScale);
482        return BAD_VALUE;
483    }
484    mAudioTimeScale = timeScale;
485    return OK;
486}
487
488status_t StagefrightRecorder::setParameter(
489        const String8 &key, const String8 &value) {
490    LOGV("setParameter: key (%s) => value (%s)", key.string(), value.string());
491    if (key == "max-duration") {
492        int64_t max_duration_ms;
493        if (safe_strtoi64(value.string(), &max_duration_ms)) {
494            return setParamMaxFileDurationUs(1000LL * max_duration_ms);
495        }
496    } else if (key == "max-filesize") {
497        int64_t max_filesize_bytes;
498        if (safe_strtoi64(value.string(), &max_filesize_bytes)) {
499            return setParamMaxFileSizeBytes(max_filesize_bytes);
500        }
501    } else if (key == "interleave-duration-us") {
502        int32_t durationUs;
503        if (safe_strtoi32(value.string(), &durationUs)) {
504            return setParamInterleaveDuration(durationUs);
505        }
506    } else if (key == "param-movie-time-scale") {
507        int32_t timeScale;
508        if (safe_strtoi32(value.string(), &timeScale)) {
509            return setParamMovieTimeScale(timeScale);
510        }
511    } else if (key == "param-use-64bit-offset") {
512        int32_t use64BitOffset;
513        if (safe_strtoi32(value.string(), &use64BitOffset)) {
514            return setParam64BitFileOffset(use64BitOffset != 0);
515        }
516    } else if (key == "param-track-time-status") {
517        int64_t timeDurationUs;
518        if (safe_strtoi64(value.string(), &timeDurationUs)) {
519            return setParamTrackTimeStatus(timeDurationUs);
520        }
521    } else if (key == "audio-param-sampling-rate") {
522        int32_t sampling_rate;
523        if (safe_strtoi32(value.string(), &sampling_rate)) {
524            return setParamAudioSamplingRate(sampling_rate);
525        }
526    } else if (key == "audio-param-number-of-channels") {
527        int32_t number_of_channels;
528        if (safe_strtoi32(value.string(), &number_of_channels)) {
529            return setParamAudioNumberOfChannels(number_of_channels);
530        }
531    } else if (key == "audio-param-encoding-bitrate") {
532        int32_t audio_bitrate;
533        if (safe_strtoi32(value.string(), &audio_bitrate)) {
534            return setParamAudioEncodingBitRate(audio_bitrate);
535        }
536    } else if (key == "audio-param-time-scale") {
537        int32_t timeScale;
538        if (safe_strtoi32(value.string(), &timeScale)) {
539            return setParamAudioTimeScale(timeScale);
540        }
541    } else if (key == "video-param-encoding-bitrate") {
542        int32_t video_bitrate;
543        if (safe_strtoi32(value.string(), &video_bitrate)) {
544            return setParamVideoEncodingBitRate(video_bitrate);
545        }
546    } else if (key == "video-param-rotation-angle-degrees") {
547        int32_t degrees;
548        if (safe_strtoi32(value.string(), &degrees)) {
549            return setParamVideoRotation(degrees);
550        }
551    } else if (key == "video-param-i-frames-interval") {
552        int32_t seconds;
553        if (safe_strtoi32(value.string(), &seconds)) {
554            return setParamVideoIFramesInterval(seconds);
555        }
556    } else if (key == "video-param-encoder-profile") {
557        int32_t profile;
558        if (safe_strtoi32(value.string(), &profile)) {
559            return setParamVideoEncoderProfile(profile);
560        }
561    } else if (key == "video-param-encoder-level") {
562        int32_t level;
563        if (safe_strtoi32(value.string(), &level)) {
564            return setParamVideoEncoderLevel(level);
565        }
566    } else if (key == "video-param-camera-id") {
567        int32_t cameraId;
568        if (safe_strtoi32(value.string(), &cameraId)) {
569            return setParamVideoCameraId(cameraId);
570        }
571    } else if (key == "video-param-time-scale") {
572        int32_t timeScale;
573        if (safe_strtoi32(value.string(), &timeScale)) {
574            return setParamVideoTimeScale(timeScale);
575        }
576    } else {
577        LOGE("setParameter: failed to find key %s", key.string());
578    }
579    return BAD_VALUE;
580}
581
582status_t StagefrightRecorder::setParameters(const String8 &params) {
583    LOGV("setParameters: %s", params.string());
584    const char *cparams = params.string();
585    const char *key_start = cparams;
586    for (;;) {
587        const char *equal_pos = strchr(key_start, '=');
588        if (equal_pos == NULL) {
589            LOGE("Parameters %s miss a value", cparams);
590            return BAD_VALUE;
591        }
592        String8 key(key_start, equal_pos - key_start);
593        TrimString(&key);
594        if (key.length() == 0) {
595            LOGE("Parameters %s contains an empty key", cparams);
596            return BAD_VALUE;
597        }
598        const char *value_start = equal_pos + 1;
599        const char *semicolon_pos = strchr(value_start, ';');
600        String8 value;
601        if (semicolon_pos == NULL) {
602            value.setTo(value_start);
603        } else {
604            value.setTo(value_start, semicolon_pos - value_start);
605        }
606        if (setParameter(key, value) != OK) {
607            return BAD_VALUE;
608        }
609        if (semicolon_pos == NULL) {
610            break;  // Reaches the end
611        }
612        key_start = semicolon_pos + 1;
613    }
614    return OK;
615}
616
617status_t StagefrightRecorder::setListener(const sp<IMediaRecorderClient> &listener) {
618    mListener = listener;
619
620    return OK;
621}
622
623status_t StagefrightRecorder::prepare() {
624    return OK;
625}
626
627status_t StagefrightRecorder::start() {
628    CHECK(mOutputFd >= 0);
629
630    if (mWriter != NULL) {
631        LOGE("File writer is not avaialble");
632        return UNKNOWN_ERROR;
633    }
634
635    switch (mOutputFormat) {
636        case OUTPUT_FORMAT_DEFAULT:
637        case OUTPUT_FORMAT_THREE_GPP:
638        case OUTPUT_FORMAT_MPEG_4:
639            return startMPEG4Recording();
640
641        case OUTPUT_FORMAT_AMR_NB:
642        case OUTPUT_FORMAT_AMR_WB:
643            return startAMRRecording();
644
645        case OUTPUT_FORMAT_AAC_ADIF:
646        case OUTPUT_FORMAT_AAC_ADTS:
647            return startAACRecording();
648
649        case OUTPUT_FORMAT_RTP_AVP:
650            return startRTPRecording();
651
652        case OUTPUT_FORMAT_MPEG2TS:
653            return startMPEG2TSRecording();
654
655        default:
656            LOGE("Unsupported output file format: %d", mOutputFormat);
657            return UNKNOWN_ERROR;
658    }
659}
660
661sp<MediaSource> StagefrightRecorder::createAudioSource() {
662    sp<AudioSource> audioSource =
663        new AudioSource(
664                mAudioSource,
665                mSampleRate,
666                mAudioChannels);
667
668    status_t err = audioSource->initCheck();
669
670    if (err != OK) {
671        LOGE("audio source is not initialized");
672        return NULL;
673    }
674
675    sp<MetaData> encMeta = new MetaData;
676    const char *mime;
677    switch (mAudioEncoder) {
678        case AUDIO_ENCODER_AMR_NB:
679        case AUDIO_ENCODER_DEFAULT:
680            mime = MEDIA_MIMETYPE_AUDIO_AMR_NB;
681            break;
682        case AUDIO_ENCODER_AMR_WB:
683            mime = MEDIA_MIMETYPE_AUDIO_AMR_WB;
684            break;
685        case AUDIO_ENCODER_AAC:
686            mime = MEDIA_MIMETYPE_AUDIO_AAC;
687            break;
688        default:
689            LOGE("Unknown audio encoder: %d", mAudioEncoder);
690            return NULL;
691    }
692    encMeta->setCString(kKeyMIMEType, mime);
693
694    int32_t maxInputSize;
695    CHECK(audioSource->getFormat()->findInt32(
696                kKeyMaxInputSize, &maxInputSize));
697
698    encMeta->setInt32(kKeyMaxInputSize, maxInputSize);
699    encMeta->setInt32(kKeyChannelCount, mAudioChannels);
700    encMeta->setInt32(kKeySampleRate, mSampleRate);
701    encMeta->setInt32(kKeyBitRate, mAudioBitRate);
702    if (mAudioTimeScale > 0) {
703        encMeta->setInt32(kKeyTimeScale, mAudioTimeScale);
704    }
705
706    OMXClient client;
707    CHECK_EQ(client.connect(), OK);
708
709    sp<MediaSource> audioEncoder =
710        OMXCodec::Create(client.interface(), encMeta,
711                         true /* createEncoder */, audioSource);
712    mAudioSourceNode = audioSource;
713
714    return audioEncoder;
715}
716
717status_t StagefrightRecorder::startAACRecording() {
718    CHECK(mOutputFormat == OUTPUT_FORMAT_AAC_ADIF ||
719          mOutputFormat == OUTPUT_FORMAT_AAC_ADTS);
720
721    CHECK(mAudioEncoder == AUDIO_ENCODER_AAC);
722    CHECK(mAudioSource != AUDIO_SOURCE_LIST_END);
723
724    CHECK(0 == "AACWriter is not implemented yet");
725
726    return OK;
727}
728
729status_t StagefrightRecorder::startAMRRecording() {
730    CHECK(mOutputFormat == OUTPUT_FORMAT_AMR_NB ||
731          mOutputFormat == OUTPUT_FORMAT_AMR_WB);
732
733    if (mOutputFormat == OUTPUT_FORMAT_AMR_NB) {
734        if (mAudioEncoder != AUDIO_ENCODER_DEFAULT &&
735            mAudioEncoder != AUDIO_ENCODER_AMR_NB) {
736            LOGE("Invalid encoder %d used for AMRNB recording",
737                    mAudioEncoder);
738            return BAD_VALUE;
739        }
740        if (mSampleRate != 8000) {
741            LOGE("Invalid sampling rate %d used for AMRNB recording",
742                    mSampleRate);
743            return BAD_VALUE;
744        }
745    } else {  // mOutputFormat must be OUTPUT_FORMAT_AMR_WB
746        if (mAudioEncoder != AUDIO_ENCODER_AMR_WB) {
747            LOGE("Invlaid encoder %d used for AMRWB recording",
748                    mAudioEncoder);
749            return BAD_VALUE;
750        }
751        if (mSampleRate != 16000) {
752            LOGE("Invalid sample rate %d used for AMRWB recording",
753                    mSampleRate);
754            return BAD_VALUE;
755        }
756    }
757    if (mAudioChannels != 1) {
758        LOGE("Invalid number of audio channels %d used for amr recording",
759                mAudioChannels);
760        return BAD_VALUE;
761    }
762
763    if (mAudioSource >= AUDIO_SOURCE_LIST_END) {
764        LOGE("Invalid audio source: %d", mAudioSource);
765        return BAD_VALUE;
766    }
767
768    sp<MediaSource> audioEncoder = createAudioSource();
769
770    if (audioEncoder == NULL) {
771        return UNKNOWN_ERROR;
772    }
773
774    mWriter = new AMRWriter(dup(mOutputFd));
775    mWriter->addSource(audioEncoder);
776
777    if (mMaxFileDurationUs != 0) {
778        mWriter->setMaxFileDuration(mMaxFileDurationUs);
779    }
780    if (mMaxFileSizeBytes != 0) {
781        mWriter->setMaxFileSize(mMaxFileSizeBytes);
782    }
783    mWriter->setListener(mListener);
784    mWriter->start();
785
786    return OK;
787}
788
789status_t StagefrightRecorder::startRTPRecording() {
790    CHECK_EQ(mOutputFormat, OUTPUT_FORMAT_RTP_AVP);
791
792    if ((mAudioSource != AUDIO_SOURCE_LIST_END
793                && mVideoSource != VIDEO_SOURCE_LIST_END)
794            || (mAudioSource == AUDIO_SOURCE_LIST_END
795                && mVideoSource == VIDEO_SOURCE_LIST_END)) {
796        // Must have exactly one source.
797        return BAD_VALUE;
798    }
799
800    if (mOutputFd < 0) {
801        return BAD_VALUE;
802    }
803
804    sp<MediaSource> source;
805
806    if (mAudioSource != AUDIO_SOURCE_LIST_END) {
807        source = createAudioSource();
808    } else {
809        status_t err = setupVideoEncoder(&source);
810        if (err != OK) {
811            return err;
812        }
813    }
814
815    mWriter = new ARTPWriter(dup(mOutputFd));
816    mWriter->addSource(source);
817    mWriter->setListener(mListener);
818
819    return mWriter->start();
820}
821
822status_t StagefrightRecorder::startMPEG2TSRecording() {
823    CHECK_EQ(mOutputFormat, OUTPUT_FORMAT_MPEG2TS);
824
825    sp<MediaWriter> writer = new MPEG2TSWriter(dup(mOutputFd));
826
827    if (mAudioSource != AUDIO_SOURCE_LIST_END) {
828        if (mAudioEncoder != AUDIO_ENCODER_AAC) {
829            return ERROR_UNSUPPORTED;
830        }
831
832        status_t err = setupAudioEncoder(writer);
833
834        if (err != OK) {
835            return err;
836        }
837    }
838
839    if (mVideoSource == VIDEO_SOURCE_DEFAULT
840            || mVideoSource == VIDEO_SOURCE_CAMERA) {
841        if (mVideoEncoder != VIDEO_ENCODER_H264) {
842            return ERROR_UNSUPPORTED;
843        }
844
845        sp<MediaSource> encoder;
846        status_t err = setupVideoEncoder(&encoder);
847
848        if (err != OK) {
849            return err;
850        }
851
852        writer->addSource(encoder);
853    }
854
855    if (mMaxFileDurationUs != 0) {
856        writer->setMaxFileDuration(mMaxFileDurationUs);
857    }
858
859    if (mMaxFileSizeBytes != 0) {
860        writer->setMaxFileSize(mMaxFileSizeBytes);
861    }
862
863    mWriter = writer;
864
865    return mWriter->start();
866}
867
868void StagefrightRecorder::clipVideoFrameRate() {
869    LOGV("clipVideoFrameRate: encoder %d", mVideoEncoder);
870    int minFrameRate = mEncoderProfiles->getVideoEncoderParamByName(
871                        "enc.vid.fps.min", mVideoEncoder);
872    int maxFrameRate = mEncoderProfiles->getVideoEncoderParamByName(
873                        "enc.vid.fps.max", mVideoEncoder);
874    if (mFrameRate < minFrameRate) {
875        LOGW("Intended video encoding frame rate (%d fps) is too small"
876             " and will be set to (%d fps)", mFrameRate, minFrameRate);
877        mFrameRate = minFrameRate;
878    } else if (mFrameRate > maxFrameRate) {
879        LOGW("Intended video encoding frame rate (%d fps) is too large"
880             " and will be set to (%d fps)", mFrameRate, maxFrameRate);
881        mFrameRate = maxFrameRate;
882    }
883}
884
885void StagefrightRecorder::clipVideoBitRate() {
886    LOGV("clipVideoBitRate: encoder %d", mVideoEncoder);
887    int minBitRate = mEncoderProfiles->getVideoEncoderParamByName(
888                        "enc.vid.bps.min", mVideoEncoder);
889    int maxBitRate = mEncoderProfiles->getVideoEncoderParamByName(
890                        "enc.vid.bps.max", mVideoEncoder);
891    if (mVideoBitRate < minBitRate) {
892        LOGW("Intended video encoding bit rate (%d bps) is too small"
893             " and will be set to (%d bps)", mVideoBitRate, minBitRate);
894        mVideoBitRate = minBitRate;
895    } else if (mVideoBitRate > maxBitRate) {
896        LOGW("Intended video encoding bit rate (%d bps) is too large"
897             " and will be set to (%d bps)", mVideoBitRate, maxBitRate);
898        mVideoBitRate = maxBitRate;
899    }
900}
901
902void StagefrightRecorder::clipVideoFrameWidth() {
903    LOGV("clipVideoFrameWidth: encoder %d", mVideoEncoder);
904    int minFrameWidth = mEncoderProfiles->getVideoEncoderParamByName(
905                        "enc.vid.width.min", mVideoEncoder);
906    int maxFrameWidth = mEncoderProfiles->getVideoEncoderParamByName(
907                        "enc.vid.width.max", mVideoEncoder);
908    if (mVideoWidth < minFrameWidth) {
909        LOGW("Intended video encoding frame width (%d) is too small"
910             " and will be set to (%d)", mVideoWidth, minFrameWidth);
911        mVideoWidth = minFrameWidth;
912    } else if (mVideoWidth > maxFrameWidth) {
913        LOGW("Intended video encoding frame width (%d) is too large"
914             " and will be set to (%d)", mVideoWidth, maxFrameWidth);
915        mVideoWidth = maxFrameWidth;
916    }
917}
918
919status_t StagefrightRecorder::setupCameraSource() {
920    clipVideoBitRate();
921    clipVideoFrameRate();
922    clipVideoFrameWidth();
923    clipVideoFrameHeight();
924
925    int64_t token = IPCThreadState::self()->clearCallingIdentity();
926    if (mCamera == 0) {
927        mCamera = Camera::connect(mCameraId);
928        if (mCamera == 0) {
929            LOGE("Camera connection could not be established.");
930            return -EBUSY;
931        }
932        mFlags &= ~FLAGS_HOT_CAMERA;
933        mCamera->lock();
934    }
935
936    // Set the actual video recording frame size
937    CameraParameters params(mCamera->getParameters());
938    params.setPreviewSize(mVideoWidth, mVideoHeight);
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 (frameWidth  < 0 || frameWidth  != mVideoWidth ||
952        frameHeight < 0 || frameHeight != mVideoHeight) {
953        LOGE("Failed to set the video frame size to %dx%d",
954                mVideoWidth, mVideoHeight);
955        IPCThreadState::self()->restoreCallingIdentity(token);
956        return UNKNOWN_ERROR;
957    }
958
959    // Check on video frame rate
960    int frameRate = newCameraParams.getPreviewFrameRate();
961    if (frameRate < 0 || (frameRate - mFrameRate) != 0) {
962        LOGE("Failed to set frame rate to %d fps. The actual "
963             "frame rate is %d", mFrameRate, frameRate);
964    }
965
966    // This CHECK is good, since we just passed the lock/unlock
967    // check earlier by calling mCamera->setParameters().
968    CHECK_EQ(OK, mCamera->setPreviewDisplay(mPreviewSurface));
969    IPCThreadState::self()->restoreCallingIdentity(token);
970    return OK;
971}
972
973void StagefrightRecorder::clipVideoFrameHeight() {
974    LOGV("clipVideoFrameHeight: encoder %d", mVideoEncoder);
975    int minFrameHeight = mEncoderProfiles->getVideoEncoderParamByName(
976                        "enc.vid.height.min", mVideoEncoder);
977    int maxFrameHeight = mEncoderProfiles->getVideoEncoderParamByName(
978                        "enc.vid.height.max", mVideoEncoder);
979    if (mVideoHeight < minFrameHeight) {
980        LOGW("Intended video encoding frame height (%d) is too small"
981             " and will be set to (%d)", mVideoHeight, minFrameHeight);
982        mVideoHeight = minFrameHeight;
983    } else if (mVideoHeight > maxFrameHeight) {
984        LOGW("Intended video encoding frame height (%d) is too large"
985             " and will be set to (%d)", mVideoHeight, maxFrameHeight);
986        mVideoHeight = maxFrameHeight;
987    }
988}
989
990status_t StagefrightRecorder::setupVideoEncoder(sp<MediaSource> *source) {
991    source->clear();
992
993    status_t err = setupCameraSource();
994    if (err != OK) return err;
995
996    sp<CameraSource> cameraSource = CameraSource::CreateFromCamera(mCamera);
997    CHECK(cameraSource != NULL);
998
999    sp<MetaData> enc_meta = new MetaData;
1000    enc_meta->setInt32(kKeyBitRate, mVideoBitRate);
1001    enc_meta->setInt32(kKeySampleRate, mFrameRate);
1002
1003    switch (mVideoEncoder) {
1004        case VIDEO_ENCODER_H263:
1005            enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_H263);
1006            break;
1007
1008        case VIDEO_ENCODER_MPEG_4_SP:
1009            enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_MPEG4);
1010            break;
1011
1012        case VIDEO_ENCODER_H264:
1013            enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_AVC);
1014            break;
1015
1016        default:
1017            CHECK(!"Should not be here, unsupported video encoding.");
1018            break;
1019    }
1020
1021    sp<MetaData> meta = cameraSource->getFormat();
1022
1023    int32_t width, height, stride, sliceHeight, colorFormat;
1024    CHECK(meta->findInt32(kKeyWidth, &width));
1025    CHECK(meta->findInt32(kKeyHeight, &height));
1026    CHECK(meta->findInt32(kKeyStride, &stride));
1027    CHECK(meta->findInt32(kKeySliceHeight, &sliceHeight));
1028    CHECK(meta->findInt32(kKeyColorFormat, &colorFormat));
1029
1030    enc_meta->setInt32(kKeyWidth, width);
1031    enc_meta->setInt32(kKeyHeight, height);
1032    enc_meta->setInt32(kKeyIFramesInterval, mIFramesIntervalSec);
1033    enc_meta->setInt32(kKeyStride, stride);
1034    enc_meta->setInt32(kKeySliceHeight, sliceHeight);
1035    enc_meta->setInt32(kKeyColorFormat, colorFormat);
1036    if (mVideoTimeScale > 0) {
1037        enc_meta->setInt32(kKeyTimeScale, mVideoTimeScale);
1038    }
1039    if (mVideoEncoderProfile != -1) {
1040        enc_meta->setInt32(kKeyVideoProfile, mVideoEncoderProfile);
1041    }
1042    if (mVideoEncoderLevel != -1) {
1043        enc_meta->setInt32(kKeyVideoLevel, mVideoEncoderLevel);
1044    }
1045
1046    OMXClient client;
1047    CHECK_EQ(client.connect(), OK);
1048
1049    sp<MediaSource> encoder = OMXCodec::Create(
1050            client.interface(), enc_meta,
1051            true /* createEncoder */, cameraSource);
1052    if (encoder == NULL) {
1053        return UNKNOWN_ERROR;
1054    }
1055
1056    *source = encoder;
1057
1058    return OK;
1059}
1060
1061status_t StagefrightRecorder::setupAudioEncoder(const sp<MediaWriter>& writer) {
1062    sp<MediaSource> audioEncoder;
1063    switch(mAudioEncoder) {
1064        case AUDIO_ENCODER_AMR_NB:
1065        case AUDIO_ENCODER_AMR_WB:
1066        case AUDIO_ENCODER_AAC:
1067            audioEncoder = createAudioSource();
1068            break;
1069        default:
1070            LOGE("Unsupported audio encoder: %d", mAudioEncoder);
1071            return UNKNOWN_ERROR;
1072    }
1073
1074    if (audioEncoder == NULL) {
1075        return UNKNOWN_ERROR;
1076    }
1077
1078    writer->addSource(audioEncoder);
1079    return OK;
1080}
1081
1082status_t StagefrightRecorder::startMPEG4Recording() {
1083    int32_t totalBitRate = 0;
1084    status_t err = OK;
1085    sp<MediaWriter> writer = new MPEG4Writer(dup(mOutputFd));
1086
1087    // Add audio source first if it exists
1088    if (mAudioSource != AUDIO_SOURCE_LIST_END) {
1089        err = setupAudioEncoder(writer);
1090        if (err != OK) return err;
1091        totalBitRate += mAudioBitRate;
1092    }
1093    if (mVideoSource == VIDEO_SOURCE_DEFAULT
1094            || mVideoSource == VIDEO_SOURCE_CAMERA) {
1095        sp<MediaSource> encoder;
1096        err = setupVideoEncoder(&encoder);
1097        if (err != OK) return err;
1098        writer->addSource(encoder);
1099        totalBitRate += mVideoBitRate;
1100    }
1101
1102    if (mInterleaveDurationUs > 0) {
1103        reinterpret_cast<MPEG4Writer *>(writer.get())->
1104            setInterleaveDuration(mInterleaveDurationUs);
1105    }
1106
1107    if (mMaxFileDurationUs != 0) {
1108        writer->setMaxFileDuration(mMaxFileDurationUs);
1109    }
1110    if (mMaxFileSizeBytes != 0) {
1111        writer->setMaxFileSize(mMaxFileSizeBytes);
1112    }
1113    sp<MetaData> meta = new MetaData;
1114    meta->setInt64(kKeyTime, systemTime() / 1000);
1115    meta->setInt32(kKeyFileType, mOutputFormat);
1116    meta->setInt32(kKeyBitRate, totalBitRate);
1117    meta->setInt32(kKey64BitFileOffset, mUse64BitFileOffset);
1118    if (mMovieTimeScale > 0) {
1119        meta->setInt32(kKeyTimeScale, mMovieTimeScale);
1120    }
1121    if (mTrackEveryTimeDurationUs > 0) {
1122        meta->setInt64(kKeyTrackTimeStatus, mTrackEveryTimeDurationUs);
1123    }
1124    if (mRotationDegrees != 0) {
1125        meta->setInt32(kKeyRotationDegree, mRotationDegrees);
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    status_t err = OK;
1144    if (mWriter != NULL) {
1145        err = mWriter->stop();
1146        mWriter.clear();
1147    }
1148
1149    if (mCamera != 0) {
1150        LOGV("Disconnect camera");
1151        int64_t token = IPCThreadState::self()->clearCallingIdentity();
1152        if ((mFlags & FLAGS_HOT_CAMERA) == 0) {
1153            LOGV("Camera was cold when we started, stopping preview");
1154            mCamera->stopPreview();
1155        }
1156        mCamera->unlock();
1157        mCamera.clear();
1158        IPCThreadState::self()->restoreCallingIdentity(token);
1159        mFlags = 0;
1160    }
1161
1162    if (mOutputFd >= 0) {
1163        ::close(mOutputFd);
1164        mOutputFd = -1;
1165    }
1166
1167    return err;
1168}
1169
1170status_t StagefrightRecorder::close() {
1171    LOGV("close");
1172    stop();
1173
1174    return OK;
1175}
1176
1177status_t StagefrightRecorder::reset() {
1178    LOGV("reset");
1179    stop();
1180
1181    // No audio or video source by default
1182    mAudioSource = AUDIO_SOURCE_LIST_END;
1183    mVideoSource = VIDEO_SOURCE_LIST_END;
1184
1185    // Default parameters
1186    mOutputFormat  = OUTPUT_FORMAT_THREE_GPP;
1187    mAudioEncoder  = AUDIO_ENCODER_AMR_NB;
1188    mVideoEncoder  = VIDEO_ENCODER_H263;
1189    mVideoWidth    = 176;
1190    mVideoHeight   = 144;
1191    mFrameRate     = 20;
1192    mVideoBitRate  = 192000;
1193    mSampleRate    = 8000;
1194    mAudioChannels = 1;
1195    mAudioBitRate  = 12200;
1196    mInterleaveDurationUs = 0;
1197    mIFramesIntervalSec = 1;
1198    mAudioSourceNode = 0;
1199    mUse64BitFileOffset = false;
1200    mMovieTimeScale  = -1;
1201    mAudioTimeScale  = -1;
1202    mVideoTimeScale  = -1;
1203    mCameraId        = 0;
1204    mVideoEncoderProfile = -1;
1205    mVideoEncoderLevel   = -1;
1206    mMaxFileDurationUs = 0;
1207    mMaxFileSizeBytes = 0;
1208    mTrackEveryTimeDurationUs = 0;
1209    mRotationDegrees = 0;
1210    mEncoderProfiles = MediaProfiles::getInstance();
1211
1212    mOutputFd = -1;
1213    mFlags = 0;
1214
1215    return OK;
1216}
1217
1218status_t StagefrightRecorder::getMaxAmplitude(int *max) {
1219    LOGV("getMaxAmplitude");
1220
1221    if (max == NULL) {
1222        LOGE("Null pointer argument");
1223        return BAD_VALUE;
1224    }
1225
1226    if (mAudioSourceNode != 0) {
1227        *max = mAudioSourceNode->getMaxAmplitude();
1228    } else {
1229        *max = 0;
1230    }
1231
1232    return OK;
1233}
1234
1235status_t StagefrightRecorder::dump(
1236        int fd, const Vector<String16>& args) const {
1237    LOGV("dump");
1238    const size_t SIZE = 256;
1239    char buffer[SIZE];
1240    String8 result;
1241    if (mWriter != 0) {
1242        mWriter->dump(fd, args);
1243    } else {
1244        snprintf(buffer, SIZE, "   No file writer\n");
1245        result.append(buffer);
1246    }
1247    snprintf(buffer, SIZE, "   Recorder: %p\n", this);
1248    snprintf(buffer, SIZE, "   Output file (fd %d):\n", mOutputFd);
1249    result.append(buffer);
1250    snprintf(buffer, SIZE, "     File format: %d\n", mOutputFormat);
1251    result.append(buffer);
1252    snprintf(buffer, SIZE, "     Max file size (bytes): %lld\n", mMaxFileSizeBytes);
1253    result.append(buffer);
1254    snprintf(buffer, SIZE, "     Max file duration (us): %lld\n", mMaxFileDurationUs);
1255    result.append(buffer);
1256    snprintf(buffer, SIZE, "     File offset length (bits): %d\n", mUse64BitFileOffset? 64: 32);
1257    result.append(buffer);
1258    snprintf(buffer, SIZE, "     Interleave duration (us): %d\n", mInterleaveDurationUs);
1259    result.append(buffer);
1260    snprintf(buffer, SIZE, "     Progress notification: %lld us\n", mTrackEveryTimeDurationUs);
1261    result.append(buffer);
1262    snprintf(buffer, SIZE, "   Audio\n");
1263    result.append(buffer);
1264    snprintf(buffer, SIZE, "     Source: %d\n", mAudioSource);
1265    result.append(buffer);
1266    snprintf(buffer, SIZE, "     Encoder: %d\n", mAudioEncoder);
1267    result.append(buffer);
1268    snprintf(buffer, SIZE, "     Bit rate (bps): %d\n", mAudioBitRate);
1269    result.append(buffer);
1270    snprintf(buffer, SIZE, "     Sampling rate (hz): %d\n", mSampleRate);
1271    result.append(buffer);
1272    snprintf(buffer, SIZE, "     Number of channels: %d\n", mAudioChannels);
1273    result.append(buffer);
1274    snprintf(buffer, SIZE, "     Max amplitude: %d\n", mAudioSourceNode == 0? 0: mAudioSourceNode->getMaxAmplitude());
1275    result.append(buffer);
1276    snprintf(buffer, SIZE, "   Video\n");
1277    result.append(buffer);
1278    snprintf(buffer, SIZE, "     Source: %d\n", mVideoSource);
1279    result.append(buffer);
1280    snprintf(buffer, SIZE, "     Camera Id: %d\n", mCameraId);
1281    result.append(buffer);
1282    snprintf(buffer, SIZE, "     Camera flags: %d\n", mFlags);
1283    result.append(buffer);
1284    snprintf(buffer, SIZE, "     Encoder: %d\n", mVideoEncoder);
1285    result.append(buffer);
1286    snprintf(buffer, SIZE, "     Encoder profile: %d\n", mVideoEncoderProfile);
1287    result.append(buffer);
1288    snprintf(buffer, SIZE, "     Encoder level: %d\n", mVideoEncoderLevel);
1289    result.append(buffer);
1290    snprintf(buffer, SIZE, "     I frames interval (s): %d\n", mIFramesIntervalSec);
1291    result.append(buffer);
1292    snprintf(buffer, SIZE, "     Frame size (pixels): %dx%d\n", mVideoWidth, mVideoHeight);
1293    result.append(buffer);
1294    snprintf(buffer, SIZE, "     Frame rate (fps): %d\n", mFrameRate);
1295    result.append(buffer);
1296    snprintf(buffer, SIZE, "     Bit rate (bps): %d\n", mVideoBitRate);
1297    result.append(buffer);
1298    ::write(fd, result.string(), result.size());
1299    return OK;
1300}
1301}  // namespace android
1302