StagefrightRecorder.cpp revision a7d1a2dd776bf356c228785a94ba8e0ff6a2ec7f
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/MPEG4Writer.h> 28#include <media/stagefright/MediaDebug.h> 29#include <media/stagefright/MediaDefs.h> 30#include <media/stagefright/MetaData.h> 31#include <media/stagefright/OMXClient.h> 32#include <media/stagefright/OMXCodec.h> 33#include <camera/ICamera.h> 34#include <camera/Camera.h> 35#include <camera/CameraParameters.h> 36#include <surfaceflinger/ISurface.h> 37#include <utils/Errors.h> 38#include <sys/types.h> 39#include <unistd.h> 40#include <ctype.h> 41 42namespace android { 43 44StagefrightRecorder::StagefrightRecorder() { 45 reset(); 46} 47 48StagefrightRecorder::~StagefrightRecorder() { 49 stop(); 50 51 if (mOutputFd >= 0) { 52 ::close(mOutputFd); 53 mOutputFd = -1; 54 } 55} 56 57status_t StagefrightRecorder::init() { 58 return OK; 59} 60 61status_t StagefrightRecorder::setAudioSource(audio_source as) { 62 mAudioSource = as; 63 64 return OK; 65} 66 67status_t StagefrightRecorder::setVideoSource(video_source vs) { 68 mVideoSource = vs; 69 70 return OK; 71} 72 73status_t StagefrightRecorder::setOutputFormat(output_format of) { 74 mOutputFormat = of; 75 76 return OK; 77} 78 79status_t StagefrightRecorder::setAudioEncoder(audio_encoder ae) { 80 mAudioEncoder = ae; 81 82 return OK; 83} 84 85status_t StagefrightRecorder::setVideoEncoder(video_encoder ve) { 86 mVideoEncoder = ve; 87 88 return OK; 89} 90 91status_t StagefrightRecorder::setVideoSize(int width, int height) { 92 if (width <= 0 || height <= 0) { 93 LOGE("Invalid video size: %dx%d", width, height); 94 return BAD_VALUE; 95 } 96 97 // Additional check on the dimension will be performed later 98 mVideoWidth = width; 99 mVideoHeight = height; 100 101 return OK; 102} 103 104status_t StagefrightRecorder::setVideoFrameRate(int frames_per_second) { 105 if (frames_per_second <= 0 || frames_per_second > 30) { 106 LOGE("Invalid video frame rate: %d", frames_per_second); 107 return BAD_VALUE; 108 } 109 110 // Additional check on the frame rate will be performed later 111 mFrameRate = frames_per_second; 112 113 return OK; 114} 115 116status_t StagefrightRecorder::setCamera(const sp<ICamera> &camera) { 117 LOGV("setCamera"); 118 if (camera == 0) { 119 LOGE("camera is NULL"); 120 return UNKNOWN_ERROR; 121 } 122 123 int64_t token = IPCThreadState::self()->clearCallingIdentity(); 124 mFlags &= ~FLAGS_HOT_CAMERA; 125 mCamera = Camera::create(camera); 126 if (mCamera == 0) { 127 LOGE("Unable to connect to camera"); 128 IPCThreadState::self()->restoreCallingIdentity(token); 129 return UNKNOWN_ERROR; 130 } 131 132 LOGV("Connected to camera"); 133 if (mCamera->previewEnabled()) { 134 LOGV("camera is hot"); 135 mFlags |= FLAGS_HOT_CAMERA; 136 } 137 IPCThreadState::self()->restoreCallingIdentity(token); 138 139 return OK; 140} 141 142status_t StagefrightRecorder::setPreviewSurface(const sp<ISurface> &surface) { 143 mPreviewSurface = surface; 144 145 return OK; 146} 147 148status_t StagefrightRecorder::setOutputFile(const char *path) { 149 // We don't actually support this at all, as the media_server process 150 // no longer has permissions to create files. 151 152 return UNKNOWN_ERROR; 153} 154 155status_t StagefrightRecorder::setOutputFile(int fd, int64_t offset, int64_t length) { 156 // These don't make any sense, do they? 157 CHECK_EQ(offset, 0); 158 CHECK_EQ(length, 0); 159 160 if (mOutputFd >= 0) { 161 ::close(mOutputFd); 162 } 163 mOutputFd = dup(fd); 164 165 return OK; 166} 167 168// Attempt to parse an int64 literal optionally surrounded by whitespace, 169// returns true on success, false otherwise. 170static bool safe_strtoi64(const char *s, int64_t *val) { 171 char *end; 172 *val = strtoll(s, &end, 10); 173 174 if (end == s || errno == ERANGE) { 175 return false; 176 } 177 178 // Skip trailing whitespace 179 while (isspace(*end)) { 180 ++end; 181 } 182 183 // For a successful return, the string must contain nothing but a valid 184 // int64 literal optionally surrounded by whitespace. 185 186 return *end == '\0'; 187} 188 189// Return true if the value is in [0, 0x007FFFFFFF] 190static bool safe_strtoi32(const char *s, int32_t *val) { 191 int64_t temp; 192 if (safe_strtoi64(s, &temp)) { 193 if (temp >= 0 && temp <= 0x007FFFFFFF) { 194 *val = static_cast<int32_t>(temp); 195 return true; 196 } 197 } 198 return false; 199} 200 201// Trim both leading and trailing whitespace from the given string. 202static void TrimString(String8 *s) { 203 size_t num_bytes = s->bytes(); 204 const char *data = s->string(); 205 206 size_t leading_space = 0; 207 while (leading_space < num_bytes && isspace(data[leading_space])) { 208 ++leading_space; 209 } 210 211 size_t i = num_bytes; 212 while (i > leading_space && isspace(data[i - 1])) { 213 --i; 214 } 215 216 s->setTo(String8(&data[leading_space], i - leading_space)); 217} 218 219status_t StagefrightRecorder::setParamAudioSamplingRate(int32_t sampleRate) { 220 LOGV("setParamAudioSamplingRate: %d", sampleRate); 221 if (sampleRate <= 0) { 222 LOGE("Invalid audio sampling rate: %d", sampleRate); 223 return BAD_VALUE; 224 } 225 226 // Additional check on the sample rate will be performed later. 227 mSampleRate = sampleRate; 228 return OK; 229} 230 231status_t StagefrightRecorder::setParamAudioNumberOfChannels(int32_t channels) { 232 LOGV("setParamAudioNumberOfChannels: %d", channels); 233 if (channels <= 0 || channels >= 3) { 234 LOGE("Invalid number of audio channels: %d", channels); 235 } 236 237 // Additional check on the number of channels will be performed later. 238 mAudioChannels = channels; 239 return OK; 240} 241 242status_t StagefrightRecorder::setParamAudioEncodingBitRate(int32_t bitRate) { 243 LOGV("setParamAudioEncodingBitRate: %d", bitRate); 244 if (bitRate <= 0) { 245 LOGE("Invalid audio encoding bit rate: %d", bitRate); 246 return BAD_VALUE; 247 } 248 249 // The target bit rate may not be exactly the same as the requested. 250 // It depends on many factors, such as rate control, and the bit rate 251 // range that a specific encoder supports. The mismatch between the 252 // the target and requested bit rate will NOT be treated as an error. 253 mAudioBitRate = bitRate; 254 return OK; 255} 256 257status_t StagefrightRecorder::setParamVideoEncodingBitRate(int32_t bitRate) { 258 LOGV("setParamVideoEncodingBitRate: %d", bitRate); 259 if (bitRate <= 0) { 260 LOGE("Invalid video encoding bit rate: %d", bitRate); 261 return BAD_VALUE; 262 } 263 264 // The target bit rate may not be exactly the same as the requested. 265 // It depends on many factors, such as rate control, and the bit rate 266 // range that a specific encoder supports. The mismatch between the 267 // the target and requested bit rate will NOT be treated as an error. 268 mVideoBitRate = bitRate; 269 return OK; 270} 271 272status_t StagefrightRecorder::setParamMaxDurationOrFileSize(int64_t limit, 273 bool limit_is_duration) { 274 LOGV("setParamMaxDurationOrFileSize: limit (%lld) for %s", 275 limit, limit_is_duration?"duration":"size"); 276 if (limit_is_duration) { // limit is in ms 277 if (limit <= 1000) { // XXX: 1 second 278 LOGE("Max file duration is too short: %lld us", limit); 279 } 280 mMaxFileDurationUs = limit * 1000LL; 281 } else { 282 if (limit <= 1024) { // XXX: 1 kB 283 LOGE("Max file size is too small: %lld bytes", limit); 284 } 285 mMaxFileSizeBytes = limit; 286 } 287 return OK; 288} 289 290status_t StagefrightRecorder::setParamInterleaveDuration(int32_t durationUs) { 291 LOGV("setParamInterleaveDuration: %d", durationUs); 292 if (durationUs <= 500000) { // 500 ms 293 // If interleave duration is too small, it is very inefficient to do 294 // interleaving since the metadata overhead will count for a significant 295 // portion of the saved contents 296 LOGE("Audio/video interleave duration is too small: %d us", durationUs); 297 return BAD_VALUE; 298 } else if (durationUs >= 10000000) { // 10 seconds 299 // If interleaving duration is too large, it can cause the recording 300 // session to use too much memory since we have to save the output 301 // data before we write them out 302 LOGE("Audio/video interleave duration is too large: %d us", durationUs); 303 return BAD_VALUE; 304 } 305 mInterleaveDurationUs = durationUs; 306 return OK; 307} 308 309// If interval < 0, only the first frame is I frame, and rest are all P frames 310// If interval == 0, all frames are encoded as I frames. No P frames 311// If interval > 0, it is the time spacing between 2 neighboring I frames 312status_t StagefrightRecorder::setParamIFramesInterval(int32_t interval) { 313 LOGV("setParamIFramesInterval: %d seconds", interval); 314 mIFramesInterval = interval; 315 return OK; 316} 317 318status_t StagefrightRecorder::setParameter( 319 const String8 &key, const String8 &value) { 320 LOGV("setParameter: key (%s) => value (%s)", key.string(), value.string()); 321 if (key == "max-duration") { 322 int64_t max_duration_ms; 323 if (safe_strtoi64(value.string(), &max_duration_ms)) { 324 return setParamMaxDurationOrFileSize( 325 max_duration_ms, true /* limit_is_duration */); 326 } 327 } else if (key == "max-filesize") { 328 int64_t max_filesize_bytes; 329 if (safe_strtoi64(value.string(), &max_filesize_bytes)) { 330 return setParamMaxDurationOrFileSize( 331 max_filesize_bytes, false /* limit is filesize */); 332 } 333 } else if (key == "audio-param-sampling-rate") { 334 int32_t sampling_rate; 335 if (safe_strtoi32(value.string(), &sampling_rate)) { 336 return setParamAudioSamplingRate(sampling_rate); 337 } 338 } else if (key == "audio-param-number-of-channels") { 339 int32_t number_of_channels; 340 if (safe_strtoi32(value.string(), &number_of_channels)) { 341 return setParamAudioNumberOfChannels(number_of_channels); 342 } 343 } else if (key == "audio-param-encoding-bitrate") { 344 int32_t audio_bitrate; 345 if (safe_strtoi32(value.string(), &audio_bitrate)) { 346 return setParamAudioEncodingBitRate(audio_bitrate); 347 } 348 } else if (key == "video-param-encoding-bitrate") { 349 int32_t video_bitrate; 350 if (safe_strtoi32(value.string(), &video_bitrate)) { 351 return setParamVideoEncodingBitRate(video_bitrate); 352 } 353 } else if (key == "param-interleave-duration-us") { 354 int32_t durationUs; 355 if (safe_strtoi32(value.string(), &durationUs)) { 356 return setParamInterleaveDuration(durationUs); 357 } 358 } else if (key == "param-i-frames-interval") { 359 int32_t interval; 360 if (safe_strtoi32(value.string(), &interval)) { 361 return setParamIFramesInterval(interval); 362 } 363 } else { 364 LOGE("setParameter: failed to find key %s", key.string()); 365 } 366 return BAD_VALUE; 367} 368 369status_t StagefrightRecorder::setParameters(const String8 ¶ms) { 370 LOGV("setParameters: %s", params.string()); 371 const char *cparams = params.string(); 372 const char *key_start = cparams; 373 for (;;) { 374 const char *equal_pos = strchr(key_start, '='); 375 if (equal_pos == NULL) { 376 LOGE("Parameters %s miss a value", cparams); 377 return BAD_VALUE; 378 } 379 String8 key(key_start, equal_pos - key_start); 380 TrimString(&key); 381 if (key.length() == 0) { 382 LOGE("Parameters %s contains an empty key", cparams); 383 return BAD_VALUE; 384 } 385 const char *value_start = equal_pos + 1; 386 const char *semicolon_pos = strchr(value_start, ';'); 387 String8 value; 388 if (semicolon_pos == NULL) { 389 value.setTo(value_start); 390 } else { 391 value.setTo(value_start, semicolon_pos - value_start); 392 } 393 if (setParameter(key, value) != OK) { 394 return BAD_VALUE; 395 } 396 if (semicolon_pos == NULL) { 397 break; // Reaches the end 398 } 399 key_start = semicolon_pos + 1; 400 } 401 return OK; 402} 403 404status_t StagefrightRecorder::setListener(const sp<IMediaPlayerClient> &listener) { 405 mListener = listener; 406 407 return OK; 408} 409 410status_t StagefrightRecorder::prepare() { 411 return OK; 412} 413 414status_t StagefrightRecorder::start() { 415 if (mWriter != NULL) { 416 return UNKNOWN_ERROR; 417 } 418 419 switch (mOutputFormat) { 420 case OUTPUT_FORMAT_DEFAULT: 421 case OUTPUT_FORMAT_THREE_GPP: 422 case OUTPUT_FORMAT_MPEG_4: 423 return startMPEG4Recording(); 424 425 case OUTPUT_FORMAT_AMR_NB: 426 case OUTPUT_FORMAT_AMR_WB: 427 return startAMRRecording(); 428 429 case OUTPUT_FORMAT_AAC_ADIF: 430 case OUTPUT_FORMAT_AAC_ADTS: 431 return startAACRecording(); 432 433 default: 434 return UNKNOWN_ERROR; 435 } 436} 437 438sp<MediaSource> StagefrightRecorder::createAudioSource() { 439 sp<AudioSource> audioSource = 440 new AudioSource( 441 mAudioSource, 442 mSampleRate, 443 AudioSystem::CHANNEL_IN_MONO); 444 445 status_t err = audioSource->initCheck(); 446 447 if (err != OK) { 448 LOGE("audio source is not initialized"); 449 return NULL; 450 } 451 452 sp<MetaData> encMeta = new MetaData; 453 const char *mime; 454 switch (mAudioEncoder) { 455 case AUDIO_ENCODER_AMR_NB: 456 case AUDIO_ENCODER_DEFAULT: 457 mime = MEDIA_MIMETYPE_AUDIO_AMR_NB; 458 break; 459 case AUDIO_ENCODER_AMR_WB: 460 mime = MEDIA_MIMETYPE_AUDIO_AMR_WB; 461 break; 462 case AUDIO_ENCODER_AAC: 463 mime = MEDIA_MIMETYPE_AUDIO_AAC; 464 break; 465 default: 466 LOGE("Unknown audio encoder: %d", mAudioEncoder); 467 return NULL; 468 } 469 encMeta->setCString(kKeyMIMEType, mime); 470 471 int32_t maxInputSize; 472 CHECK(audioSource->getFormat()->findInt32( 473 kKeyMaxInputSize, &maxInputSize)); 474 475 encMeta->setInt32(kKeyMaxInputSize, maxInputSize); 476 encMeta->setInt32(kKeyChannelCount, mAudioChannels); 477 encMeta->setInt32(kKeySampleRate, mSampleRate); 478 encMeta->setInt32(kKeyBitRate, mAudioBitRate); 479 480 OMXClient client; 481 CHECK_EQ(client.connect(), OK); 482 483 sp<MediaSource> audioEncoder = 484 OMXCodec::Create(client.interface(), encMeta, 485 true /* createEncoder */, audioSource); 486 487 return audioEncoder; 488} 489 490status_t StagefrightRecorder::startAACRecording() { 491 CHECK(mOutputFormat == OUTPUT_FORMAT_AAC_ADIF || 492 mOutputFormat == OUTPUT_FORMAT_AAC_ADTS); 493 494 CHECK(mAudioEncoder == AUDIO_ENCODER_AAC); 495 CHECK(mAudioSource != AUDIO_SOURCE_LIST_END); 496 CHECK(mOutputFd >= 0); 497 498 CHECK(0 == "AACWriter is not implemented yet"); 499 500 return OK; 501} 502 503status_t StagefrightRecorder::startAMRRecording() { 504 CHECK(mOutputFormat == OUTPUT_FORMAT_AMR_NB || 505 mOutputFormat == OUTPUT_FORMAT_AMR_WB); 506 507 if (mOutputFormat == OUTPUT_FORMAT_AMR_NB) { 508 if (mAudioEncoder != AUDIO_ENCODER_DEFAULT && 509 mAudioEncoder != AUDIO_ENCODER_AMR_NB) { 510 LOGE("Invalid encoder %d used for AMRNB recording", 511 mAudioEncoder); 512 return UNKNOWN_ERROR; 513 } 514 if (mSampleRate != 8000) { 515 LOGE("Invalid sampling rate %d used for AMRNB recording", 516 mSampleRate); 517 return UNKNOWN_ERROR; 518 } 519 } else { // mOutputFormat must be OUTPUT_FORMAT_AMR_WB 520 if (mAudioEncoder != AUDIO_ENCODER_AMR_WB) { 521 LOGE("Invlaid encoder %d used for AMRWB recording", 522 mAudioEncoder); 523 return UNKNOWN_ERROR; 524 } 525 if (mSampleRate != 16000) { 526 LOGE("Invalid sample rate %d used for AMRWB recording", 527 mSampleRate); 528 return UNKNOWN_ERROR; 529 } 530 } 531 if (mAudioChannels != 1) { 532 LOGE("Invalid number of audio channels %d used for amr recording", 533 mAudioChannels); 534 return UNKNOWN_ERROR; 535 } 536 537 if (mAudioSource >= AUDIO_SOURCE_LIST_END) { 538 LOGE("Invalid audio source: %d", mAudioSource); 539 return UNKNOWN_ERROR; 540 } 541 542 sp<MediaSource> audioEncoder = createAudioSource(); 543 544 if (audioEncoder == NULL) { 545 return UNKNOWN_ERROR; 546 } 547 548 CHECK(mOutputFd >= 0); 549 mWriter = new AMRWriter(dup(mOutputFd)); 550 mWriter->addSource(audioEncoder); 551 552 if (mMaxFileDurationUs != 0) { 553 mWriter->setMaxFileDuration(mMaxFileDurationUs); 554 } 555 if (mMaxFileSizeBytes != 0) { 556 mWriter->setMaxFileSize(mMaxFileSizeBytes); 557 } 558 mWriter->setListener(mListener); 559 mWriter->start(); 560 561 return OK; 562} 563 564status_t StagefrightRecorder::startMPEG4Recording() { 565 mWriter = new MPEG4Writer(dup(mOutputFd)); 566 567 // Add audio source first if it exists 568 if (mAudioSource != AUDIO_SOURCE_LIST_END) { 569 sp<MediaSource> audioEncoder; 570 switch(mAudioEncoder) { 571 case AUDIO_ENCODER_AMR_NB: 572 case AUDIO_ENCODER_AMR_WB: 573 case AUDIO_ENCODER_AAC: 574 audioEncoder = createAudioSource(); 575 break; 576 default: 577 LOGE("Unsupported audio encoder: %d", mAudioEncoder); 578 return UNKNOWN_ERROR; 579 } 580 581 if (audioEncoder == NULL) { 582 return UNKNOWN_ERROR; 583 } 584 585 mWriter->addSource(audioEncoder); 586 } 587 if (mVideoSource == VIDEO_SOURCE_DEFAULT 588 || mVideoSource == VIDEO_SOURCE_CAMERA) { 589 590 int64_t token = IPCThreadState::self()->clearCallingIdentity(); 591 if (mCamera == 0) { 592 mCamera = Camera::connect(0); 593 mCamera->lock(); 594 } 595 596 // Set the actual video recording frame size 597 CameraParameters params(mCamera->getParameters()); 598 params.setPreviewSize(mVideoWidth, mVideoHeight); 599 params.setPreviewFrameRate(mFrameRate); 600 String8 s = params.flatten(); 601 CHECK_EQ(OK, mCamera->setParameters(s)); 602 CameraParameters newCameraParams(mCamera->getParameters()); 603 604 // Check on video frame size 605 int frameWidth = 0, frameHeight = 0; 606 newCameraParams.getPreviewSize(&frameWidth, &frameHeight); 607 if (frameWidth < 0 || frameWidth != mVideoWidth || 608 frameHeight < 0 || frameHeight != mVideoHeight) { 609 LOGE("Failed to set the video frame size to %dx%d", 610 mVideoWidth, mVideoHeight); 611 IPCThreadState::self()->restoreCallingIdentity(token); 612 return UNKNOWN_ERROR; 613 } 614 615 // Check on video frame rate 616 int frameRate = newCameraParams.getPreviewFrameRate(); 617 if (frameRate < 0 || (frameRate - mFrameRate) != 0) { 618 LOGE("Failed to set frame rate to %d fps. The actual " 619 "frame rate is %d", mFrameRate, frameRate); 620 } 621 622 CHECK_EQ(OK, mCamera->setPreviewDisplay(mPreviewSurface)); 623 IPCThreadState::self()->restoreCallingIdentity(token); 624 625 sp<CameraSource> cameraSource = 626 CameraSource::CreateFromCamera(mCamera); 627 628 CHECK(cameraSource != NULL); 629 630 sp<MetaData> enc_meta = new MetaData; 631 enc_meta->setInt32(kKeyBitRate, mVideoBitRate); 632 enc_meta->setInt32(kKeySampleRate, mFrameRate); // XXX: kKeySampleRate? 633 634 switch (mVideoEncoder) { 635 case VIDEO_ENCODER_H263: 636 enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_H263); 637 break; 638 639 case VIDEO_ENCODER_MPEG_4_SP: 640 enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_MPEG4); 641 break; 642 643 case VIDEO_ENCODER_H264: 644 enc_meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_AVC); 645 break; 646 647 default: 648 CHECK(!"Should not be here, unsupported video encoding."); 649 break; 650 } 651 652 sp<MetaData> meta = cameraSource->getFormat(); 653 654 int32_t width, height, stride, sliceHeight; 655 CHECK(meta->findInt32(kKeyWidth, &width)); 656 CHECK(meta->findInt32(kKeyHeight, &height)); 657 CHECK(meta->findInt32(kKeyStride, &stride)); 658 CHECK(meta->findInt32(kKeySliceHeight, &sliceHeight)); 659 660 enc_meta->setInt32(kKeyWidth, width); 661 enc_meta->setInt32(kKeyHeight, height); 662 enc_meta->setInt32(kKeyIFramesInterval, mIFramesInterval); 663 enc_meta->setInt32(kKeyStride, stride); 664 enc_meta->setInt32(kKeySliceHeight, sliceHeight); 665 666 OMXClient client; 667 CHECK_EQ(client.connect(), OK); 668 669 sp<MediaSource> encoder = 670 OMXCodec::Create( 671 client.interface(), enc_meta, 672 true /* createEncoder */, cameraSource); 673 674 CHECK(mOutputFd >= 0); 675 mWriter->addSource(encoder); 676 } 677 678 { 679 // MPEGWriter specific handling 680 MPEG4Writer *writer = ((MPEG4Writer *) mWriter.get()); // mWriter is an MPEGWriter 681 writer->setInterleaveDuration(mInterleaveDurationUs); 682 } 683 684 if (mMaxFileDurationUs != 0) { 685 mWriter->setMaxFileDuration(mMaxFileDurationUs); 686 } 687 if (mMaxFileSizeBytes != 0) { 688 mWriter->setMaxFileSize(mMaxFileSizeBytes); 689 } 690 mWriter->setListener(mListener); 691 mWriter->start(); 692 return OK; 693} 694 695status_t StagefrightRecorder::pause() { 696 if (mWriter == NULL) { 697 return UNKNOWN_ERROR; 698 } 699 mWriter->pause(); 700 return OK; 701} 702 703status_t StagefrightRecorder::stop() { 704 if (mWriter == NULL) { 705 return UNKNOWN_ERROR; 706 } 707 708 mWriter->stop(); 709 mWriter = NULL; 710 711 return OK; 712} 713 714status_t StagefrightRecorder::close() { 715 stop(); 716 717 if (mCamera != 0) { 718 int64_t token = IPCThreadState::self()->clearCallingIdentity(); 719 if ((mFlags & FLAGS_HOT_CAMERA) == 0) { 720 LOGV("Camera was cold when we started, stopping preview"); 721 mCamera->stopPreview(); 722 } 723 mCamera->unlock(); 724 mCamera = NULL; 725 IPCThreadState::self()->restoreCallingIdentity(token); 726 mFlags = 0; 727 } 728 return OK; 729} 730 731status_t StagefrightRecorder::reset() { 732 stop(); 733 734 // No audio or video source by default 735 mAudioSource = AUDIO_SOURCE_LIST_END; 736 mVideoSource = VIDEO_SOURCE_LIST_END; 737 738 // Default parameters 739 mOutputFormat = OUTPUT_FORMAT_THREE_GPP; 740 mAudioEncoder = AUDIO_ENCODER_AMR_NB; 741 mVideoEncoder = VIDEO_ENCODER_H263; 742 mVideoWidth = 176; 743 mVideoHeight = 144; 744 mFrameRate = 20; 745 mVideoBitRate = 192000; 746 mSampleRate = 8000; 747 mAudioChannels = 1; 748 mAudioBitRate = 12200; 749 mInterleaveDurationUs = 0; 750 mIFramesInterval = 1; 751 752 mOutputFd = -1; 753 mFlags = 0; 754 755 return OK; 756} 757 758status_t StagefrightRecorder::getMaxAmplitude(int *max) { 759 *max = 0; 760 761 return OK; 762} 763 764} // namespace android 765