1760943b5e7a09b602aba04ec451e97662f48b0a4James Dong/* 2760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * Copyright (C) 2011 The Android Open Source Project 3760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 4760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * Licensed under the Apache License, Version 2.0 (the "License"); 5760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * you may not use this file except in compliance with the License. 6760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * You may obtain a copy of the License at 7760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 8760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * http://www.apache.org/licenses/LICENSE-2.0 9760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 10760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * Unless required by applicable law or agreed to in writing, software 11760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * distributed under the License is distributed on an "AS IS" BASIS, 12760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * See the License for the specific language governing permissions and 14760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * limitations under the License. 15760943b5e7a09b602aba04ec451e97662f48b0a4James Dong */ 16760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 17760943b5e7a09b602aba04ec451e97662f48b0a4James Dong//#define LOG_NDEBUG 0 18760943b5e7a09b602aba04ec451e97662f48b0a4James Dong#define LOG_TAG "AACWriter" 19760943b5e7a09b602aba04ec451e97662f48b0a4James Dong#include <utils/Log.h> 20760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 21aeb8fd460ed87d032b3fb8bb61e21eb542ce0f5bDave Burke#include <media/openmax/OMX_Audio.h> 22760943b5e7a09b602aba04ec451e97662f48b0a4James Dong#include <media/stagefright/AACWriter.h> 23760943b5e7a09b602aba04ec451e97662f48b0a4James Dong#include <media/stagefright/MediaBuffer.h> 24760943b5e7a09b602aba04ec451e97662f48b0a4James Dong#include <media/stagefright/foundation/ADebug.h> 25760943b5e7a09b602aba04ec451e97662f48b0a4James Dong#include <media/stagefright/MediaDefs.h> 26760943b5e7a09b602aba04ec451e97662f48b0a4James Dong#include <media/stagefright/MediaErrors.h> 27760943b5e7a09b602aba04ec451e97662f48b0a4James Dong#include <media/stagefright/MediaSource.h> 28760943b5e7a09b602aba04ec451e97662f48b0a4James Dong#include <media/stagefright/MetaData.h> 29760943b5e7a09b602aba04ec451e97662f48b0a4James Dong#include <media/mediarecorder.h> 30760943b5e7a09b602aba04ec451e97662f48b0a4James Dong#include <sys/prctl.h> 31af8e8aa1ada2948972555592570ec9ad90cbf372Nick Kralevich#include <sys/types.h> 32af8e8aa1ada2948972555592570ec9ad90cbf372Nick Kralevich#include <sys/stat.h> 33760943b5e7a09b602aba04ec451e97662f48b0a4James Dong#include <fcntl.h> 34760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 35760943b5e7a09b602aba04ec451e97662f48b0a4James Dongnamespace android { 36760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 37760943b5e7a09b602aba04ec451e97662f48b0a4James DongAACWriter::AACWriter(const char *filename) 38760943b5e7a09b602aba04ec451e97662f48b0a4James Dong : mFd(-1), 39760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mInitCheck(NO_INIT), 40760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mStarted(false), 41760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mPaused(false), 42760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mResumed(false), 43760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mChannelCount(-1), 44aeb8fd460ed87d032b3fb8bb61e21eb542ce0f5bDave Burke mSampleRate(-1), 45aeb8fd460ed87d032b3fb8bb61e21eb542ce0f5bDave Burke mAACProfile(OMX_AUDIO_AACObjectLC) { 46760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 473856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("AACWriter Constructor"); 48760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 49af8e8aa1ada2948972555592570ec9ad90cbf372Nick Kralevich mFd = open(filename, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR, S_IRUSR | S_IWUSR); 50760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (mFd >= 0) { 51760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mInitCheck = OK; 52760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 53760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 54760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 55760943b5e7a09b602aba04ec451e97662f48b0a4James DongAACWriter::AACWriter(int fd) 56760943b5e7a09b602aba04ec451e97662f48b0a4James Dong : mFd(dup(fd)), 57760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mInitCheck(mFd < 0? NO_INIT: OK), 58760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mStarted(false), 59760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mPaused(false), 60760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mResumed(false), 61760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mChannelCount(-1), 62760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mSampleRate(-1) { 63760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 64760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 65760943b5e7a09b602aba04ec451e97662f48b0a4James DongAACWriter::~AACWriter() { 66760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (mStarted) { 678bcc65c753085fe3328592cceda0cf0e8f8b0a45James Dong reset(); 68760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 69760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 70760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (mFd != -1) { 71760943b5e7a09b602aba04ec451e97662f48b0a4James Dong close(mFd); 72760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mFd = -1; 73760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 74760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 75760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 76760943b5e7a09b602aba04ec451e97662f48b0a4James Dongstatus_t AACWriter::initCheck() const { 77760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return mInitCheck; 78760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 79760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 80760943b5e7a09b602aba04ec451e97662f48b0a4James Dongstatic int writeInt8(int fd, uint8_t x) { 81760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return ::write(fd, &x, 1); 82760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 83760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 84760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 85760943b5e7a09b602aba04ec451e97662f48b0a4James Dongstatus_t AACWriter::addSource(const sp<MediaSource> &source) { 86760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (mInitCheck != OK) { 87760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return mInitCheck; 88760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 89760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 90760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (mSource != NULL) { 9129357bc2c0dd7c43ad3bd0c8e3efa4e6fd9bfd47Steve Block ALOGE("AAC files only support a single track of audio."); 92760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return UNKNOWN_ERROR; 93760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 94760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 95760943b5e7a09b602aba04ec451e97662f48b0a4James Dong sp<MetaData> meta = source->getFormat(); 96760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 97760943b5e7a09b602aba04ec451e97662f48b0a4James Dong const char *mime; 98760943b5e7a09b602aba04ec451e97662f48b0a4James Dong CHECK(meta->findCString(kKeyMIMEType, &mime)); 99760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 100760943b5e7a09b602aba04ec451e97662f48b0a4James Dong CHECK(!strcasecmp(mime, MEDIA_MIMETYPE_AUDIO_AAC)); 101760943b5e7a09b602aba04ec451e97662f48b0a4James Dong CHECK(meta->findInt32(kKeyChannelCount, &mChannelCount)); 102760943b5e7a09b602aba04ec451e97662f48b0a4James Dong CHECK(meta->findInt32(kKeySampleRate, &mSampleRate)); 103760943b5e7a09b602aba04ec451e97662f48b0a4James Dong CHECK(mChannelCount >= 1 && mChannelCount <= 2); 104760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 1052d94235a343151bed9aa74e86697fa01241ea5cfJames Dong // Optionally, we want to check whether AACProfile is also set. 1062d94235a343151bed9aa74e86697fa01241ea5cfJames Dong if (meta->findInt32(kKeyAACProfile, &mAACProfile)) { 1072d94235a343151bed9aa74e86697fa01241ea5cfJames Dong ALOGI("AAC profile is changed to %d", mAACProfile); 1082d94235a343151bed9aa74e86697fa01241ea5cfJames Dong } 1092d94235a343151bed9aa74e86697fa01241ea5cfJames Dong 110760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mSource = source; 111760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return OK; 112760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 113760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 114760943b5e7a09b602aba04ec451e97662f48b0a4James Dongstatus_t AACWriter::start(MetaData *params) { 115760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (mInitCheck != OK) { 116760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return mInitCheck; 117760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 118760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 119760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (mSource == NULL) { 120760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return UNKNOWN_ERROR; 121760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 122760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 123760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (mStarted && mPaused) { 124760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mPaused = false; 125760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mResumed = true; 126760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return OK; 127760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } else if (mStarted) { 128760943b5e7a09b602aba04ec451e97662f48b0a4James Dong // Already started, does nothing 129760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return OK; 130760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 131760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 132760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mFrameDurationUs = (kSamplesPerFrame * 1000000LL + (mSampleRate >> 1)) 133760943b5e7a09b602aba04ec451e97662f48b0a4James Dong / mSampleRate; 134760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 135760943b5e7a09b602aba04ec451e97662f48b0a4James Dong status_t err = mSource->start(); 136760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 137760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (err != OK) { 138760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return err; 139760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 140760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 141760943b5e7a09b602aba04ec451e97662f48b0a4James Dong pthread_attr_t attr; 142760943b5e7a09b602aba04ec451e97662f48b0a4James Dong pthread_attr_init(&attr); 143760943b5e7a09b602aba04ec451e97662f48b0a4James Dong pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); 144760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 145760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mReachedEOS = false; 146760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mDone = false; 147760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 148760943b5e7a09b602aba04ec451e97662f48b0a4James Dong pthread_create(&mThread, &attr, ThreadWrapper, this); 149760943b5e7a09b602aba04ec451e97662f48b0a4James Dong pthread_attr_destroy(&attr); 150760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 151760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mStarted = true; 152760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 153760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return OK; 154760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 155760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 156760943b5e7a09b602aba04ec451e97662f48b0a4James Dongstatus_t AACWriter::pause() { 157760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (!mStarted) { 158760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return OK; 159760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 160760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mPaused = true; 161760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return OK; 162760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 163760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 1648bcc65c753085fe3328592cceda0cf0e8f8b0a45James Dongstatus_t AACWriter::reset() { 165760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (!mStarted) { 166760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return OK; 167760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 168760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 169760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mDone = true; 170760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 171760943b5e7a09b602aba04ec451e97662f48b0a4James Dong void *dummy; 172760943b5e7a09b602aba04ec451e97662f48b0a4James Dong pthread_join(mThread, &dummy); 173760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 174760943b5e7a09b602aba04ec451e97662f48b0a4James Dong status_t err = (status_t) dummy; 175760943b5e7a09b602aba04ec451e97662f48b0a4James Dong { 176760943b5e7a09b602aba04ec451e97662f48b0a4James Dong status_t status = mSource->stop(); 177760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (err == OK && 178760943b5e7a09b602aba04ec451e97662f48b0a4James Dong (status != OK && status != ERROR_END_OF_STREAM)) { 179760943b5e7a09b602aba04ec451e97662f48b0a4James Dong err = status; 180760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 181760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 182760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 183760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mStarted = false; 184760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return err; 185760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 186760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 187760943b5e7a09b602aba04ec451e97662f48b0a4James Dongbool AACWriter::exceedsFileSizeLimit() { 188760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (mMaxFileSizeLimitBytes == 0) { 189760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return false; 190760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 191760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return mEstimatedSizeBytes >= mMaxFileSizeLimitBytes; 192760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 193760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 194760943b5e7a09b602aba04ec451e97662f48b0a4James Dongbool AACWriter::exceedsFileDurationLimit() { 195760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (mMaxFileDurationLimitUs == 0) { 196760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return false; 197760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 198760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return mEstimatedDurationUs >= mMaxFileDurationLimitUs; 199760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 200760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 201760943b5e7a09b602aba04ec451e97662f48b0a4James Dong// static 202760943b5e7a09b602aba04ec451e97662f48b0a4James Dongvoid *AACWriter::ThreadWrapper(void *me) { 203760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return (void *) static_cast<AACWriter *>(me)->threadFunc(); 204760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 205760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 206760943b5e7a09b602aba04ec451e97662f48b0a4James Dong/* 207760943b5e7a09b602aba04ec451e97662f48b0a4James Dong* Returns an index into the sample rate table if the 208760943b5e7a09b602aba04ec451e97662f48b0a4James Dong* given sample rate is found; otherwise, returns -1. 209760943b5e7a09b602aba04ec451e97662f48b0a4James Dong*/ 210760943b5e7a09b602aba04ec451e97662f48b0a4James Dongstatic bool getSampleRateTableIndex(int sampleRate, uint8_t* tableIndex) { 211760943b5e7a09b602aba04ec451e97662f48b0a4James Dong static const int kSampleRateTable[] = { 212760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 96000, 88200, 64000, 48000, 44100, 32000, 213760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 24000, 22050, 16000, 12000, 11025, 8000 214760943b5e7a09b602aba04ec451e97662f48b0a4James Dong }; 215760943b5e7a09b602aba04ec451e97662f48b0a4James Dong const int tableSize = 216760943b5e7a09b602aba04ec451e97662f48b0a4James Dong sizeof(kSampleRateTable) / sizeof(kSampleRateTable[0]); 217760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 218760943b5e7a09b602aba04ec451e97662f48b0a4James Dong *tableIndex = 0; 219760943b5e7a09b602aba04ec451e97662f48b0a4James Dong for (int index = 0; index < tableSize; ++index) { 220760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (sampleRate == kSampleRateTable[index]) { 2213856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("Sample rate: %d and index: %d", 222760943b5e7a09b602aba04ec451e97662f48b0a4James Dong sampleRate, index); 223760943b5e7a09b602aba04ec451e97662f48b0a4James Dong *tableIndex = index; 224760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return true; 225760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 226760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 227760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 22829357bc2c0dd7c43ad3bd0c8e3efa4e6fd9bfd47Steve Block ALOGE("Sampling rate %d bps is not supported", sampleRate); 229760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return false; 230760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 231760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 232760943b5e7a09b602aba04ec451e97662f48b0a4James Dong/* 233760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * ADTS (Audio data transport stream) header structure. 234760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * It consists of 7 or 9 bytes (with or without CRC): 235760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 12 bits of syncword 0xFFF, all bits must be 1 236760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 1 bit of field ID. 0 for MPEG-4, and 1 for MPEG-2 237760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 2 bits of MPEG layer. If in MPEG-TS, set to 0 238760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 1 bit of protection absense. Set to 1 if no CRC. 239760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 2 bits of profile code. Set to 1 (The MPEG-4 Audio 240760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * object type minus 1. We are using AAC-LC = 2) 241760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 4 bits of sampling frequency index code (15 is not allowed) 242760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 1 bit of private stream. Set to 0. 243760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 3 bits of channel configuration code. 0 resevered for inband PCM 244760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 1 bit of originality. Set to 0. 245760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 1 bit of home. Set to 0. 246760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 1 bit of copyrighted steam. Set to 0. 247760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 1 bit of copyright start. Set to 0. 248760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 13 bits of frame length. It included 7 ot 9 bytes header length. 249760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * it is set to (protection absense? 7: 9) + size(AAC frame) 250760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 11 bits of buffer fullness. 0x7FF for VBR. 251760943b5e7a09b602aba04ec451e97662f48b0a4James Dong * 2 bits of frames count in one packet. Set to 0. 252760943b5e7a09b602aba04ec451e97662f48b0a4James Dong */ 253760943b5e7a09b602aba04ec451e97662f48b0a4James Dongstatus_t AACWriter::writeAdtsHeader(uint32_t frameLength) { 254760943b5e7a09b602aba04ec451e97662f48b0a4James Dong uint8_t data = 0xFF; 255760943b5e7a09b602aba04ec451e97662f48b0a4James Dong write(mFd, &data, 1); 256760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 257760943b5e7a09b602aba04ec451e97662f48b0a4James Dong const uint8_t kFieldId = 0; 258760943b5e7a09b602aba04ec451e97662f48b0a4James Dong const uint8_t kMpegLayer = 0; 259760943b5e7a09b602aba04ec451e97662f48b0a4James Dong const uint8_t kProtectionAbsense = 1; // 1: kAdtsHeaderLength = 7 260760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data = 0xF0; 261760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data |= (kFieldId << 3); 262760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data |= (kMpegLayer << 1); 263760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data |= kProtectionAbsense; 264760943b5e7a09b602aba04ec451e97662f48b0a4James Dong write(mFd, &data, 1); 265760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 266aeb8fd460ed87d032b3fb8bb61e21eb542ce0f5bDave Burke const uint8_t kProfileCode = mAACProfile - 1; 267760943b5e7a09b602aba04ec451e97662f48b0a4James Dong uint8_t kSampleFreqIndex; 268760943b5e7a09b602aba04ec451e97662f48b0a4James Dong CHECK(getSampleRateTableIndex(mSampleRate, &kSampleFreqIndex)); 269760943b5e7a09b602aba04ec451e97662f48b0a4James Dong const uint8_t kPrivateStream = 0; 270760943b5e7a09b602aba04ec451e97662f48b0a4James Dong const uint8_t kChannelConfigCode = mChannelCount; 271760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data = (kProfileCode << 6); 272760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data |= (kSampleFreqIndex << 2); 273760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data |= (kPrivateStream << 1); 274760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data |= (kChannelConfigCode >> 2); 275760943b5e7a09b602aba04ec451e97662f48b0a4James Dong write(mFd, &data, 1); 276760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 277760943b5e7a09b602aba04ec451e97662f48b0a4James Dong // 4 bits from originality to copyright start 278760943b5e7a09b602aba04ec451e97662f48b0a4James Dong const uint8_t kCopyright = 0; 279760943b5e7a09b602aba04ec451e97662f48b0a4James Dong const uint32_t kFrameLength = frameLength; 280760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data = ((kChannelConfigCode & 3) << 6); 281760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data |= (kCopyright << 2); 282760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data |= ((kFrameLength & 0x1800) >> 11); 283760943b5e7a09b602aba04ec451e97662f48b0a4James Dong write(mFd, &data, 1); 284760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 285760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data = ((kFrameLength & 0x07F8) >> 3); 286760943b5e7a09b602aba04ec451e97662f48b0a4James Dong write(mFd, &data, 1); 287760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 288760943b5e7a09b602aba04ec451e97662f48b0a4James Dong const uint32_t kBufferFullness = 0x7FF; // VBR 289760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data = ((kFrameLength & 0x07) << 5); 290760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data |= ((kBufferFullness & 0x07C0) >> 6); 291760943b5e7a09b602aba04ec451e97662f48b0a4James Dong write(mFd, &data, 1); 292760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 293760943b5e7a09b602aba04ec451e97662f48b0a4James Dong const uint8_t kFrameCount = 0; 294760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data = ((kBufferFullness & 0x03F) << 2); 295760943b5e7a09b602aba04ec451e97662f48b0a4James Dong data |= kFrameCount; 296760943b5e7a09b602aba04ec451e97662f48b0a4James Dong write(mFd, &data, 1); 297760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 298760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return OK; 299760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 300760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 301760943b5e7a09b602aba04ec451e97662f48b0a4James Dongstatus_t AACWriter::threadFunc() { 302760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mEstimatedDurationUs = 0; 303760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mEstimatedSizeBytes = 0; 304760943b5e7a09b602aba04ec451e97662f48b0a4James Dong int64_t previousPausedDurationUs = 0; 305760943b5e7a09b602aba04ec451e97662f48b0a4James Dong int64_t maxTimestampUs = 0; 306760943b5e7a09b602aba04ec451e97662f48b0a4James Dong status_t err = OK; 307fa514f007bd144eb99cdd68f2fe5302a4508db28James Dong bool stoppedPrematurely = true; 308760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 309760943b5e7a09b602aba04ec451e97662f48b0a4James Dong prctl(PR_SET_NAME, (unsigned long)"AACWriterThread", 0, 0, 0); 310760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 311760943b5e7a09b602aba04ec451e97662f48b0a4James Dong while (!mDone && err == OK) { 312760943b5e7a09b602aba04ec451e97662f48b0a4James Dong MediaBuffer *buffer; 313760943b5e7a09b602aba04ec451e97662f48b0a4James Dong err = mSource->read(&buffer); 314760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 315760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (err != OK) { 316760943b5e7a09b602aba04ec451e97662f48b0a4James Dong break; 317760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 318760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 319760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (mPaused) { 320760943b5e7a09b602aba04ec451e97662f48b0a4James Dong buffer->release(); 321760943b5e7a09b602aba04ec451e97662f48b0a4James Dong buffer = NULL; 322760943b5e7a09b602aba04ec451e97662f48b0a4James Dong continue; 323760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 324760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 325760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mEstimatedSizeBytes += kAdtsHeaderLength + buffer->range_length(); 326760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (exceedsFileSizeLimit()) { 327760943b5e7a09b602aba04ec451e97662f48b0a4James Dong buffer->release(); 328760943b5e7a09b602aba04ec451e97662f48b0a4James Dong buffer = NULL; 329760943b5e7a09b602aba04ec451e97662f48b0a4James Dong notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED, 0); 330760943b5e7a09b602aba04ec451e97662f48b0a4James Dong break; 331760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 332760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 333760943b5e7a09b602aba04ec451e97662f48b0a4James Dong int32_t isCodecSpecific = 0; 334760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (buffer->meta_data()->findInt32(kKeyIsCodecConfig, &isCodecSpecific) && isCodecSpecific) { 3353856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("Drop codec specific info buffer"); 336760943b5e7a09b602aba04ec451e97662f48b0a4James Dong buffer->release(); 337760943b5e7a09b602aba04ec451e97662f48b0a4James Dong buffer = NULL; 338760943b5e7a09b602aba04ec451e97662f48b0a4James Dong continue; 339760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 340760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 341760943b5e7a09b602aba04ec451e97662f48b0a4James Dong int64_t timestampUs; 342760943b5e7a09b602aba04ec451e97662f48b0a4James Dong CHECK(buffer->meta_data()->findInt64(kKeyTime, ×tampUs)); 343760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (timestampUs > mEstimatedDurationUs) { 344760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mEstimatedDurationUs = timestampUs; 345760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 346760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (mResumed) { 347760943b5e7a09b602aba04ec451e97662f48b0a4James Dong previousPausedDurationUs += (timestampUs - maxTimestampUs - mFrameDurationUs); 348760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mResumed = false; 349760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 350760943b5e7a09b602aba04ec451e97662f48b0a4James Dong timestampUs -= previousPausedDurationUs; 3513856b090cd04ba5dd4a59a12430ed724d5995909Steve Block ALOGV("time stamp: %lld, previous paused duration: %lld", 352760943b5e7a09b602aba04ec451e97662f48b0a4James Dong timestampUs, previousPausedDurationUs); 353760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (timestampUs > maxTimestampUs) { 354760943b5e7a09b602aba04ec451e97662f48b0a4James Dong maxTimestampUs = timestampUs; 355760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 356760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 357760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (exceedsFileDurationLimit()) { 358760943b5e7a09b602aba04ec451e97662f48b0a4James Dong buffer->release(); 359760943b5e7a09b602aba04ec451e97662f48b0a4James Dong buffer = NULL; 360760943b5e7a09b602aba04ec451e97662f48b0a4James Dong notify(MEDIA_RECORDER_EVENT_INFO, MEDIA_RECORDER_INFO_MAX_DURATION_REACHED, 0); 361760943b5e7a09b602aba04ec451e97662f48b0a4James Dong break; 362760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 363760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 364760943b5e7a09b602aba04ec451e97662f48b0a4James Dong // Each output AAC audio frame to the file contains 365760943b5e7a09b602aba04ec451e97662f48b0a4James Dong // 1. an ADTS header, followed by 366760943b5e7a09b602aba04ec451e97662f48b0a4James Dong // 2. the compressed audio data. 367760943b5e7a09b602aba04ec451e97662f48b0a4James Dong ssize_t dataLength = buffer->range_length(); 368760943b5e7a09b602aba04ec451e97662f48b0a4James Dong uint8_t *data = (uint8_t *)buffer->data() + buffer->range_offset(); 369760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (writeAdtsHeader(kAdtsHeaderLength + dataLength) != OK || 370760943b5e7a09b602aba04ec451e97662f48b0a4James Dong dataLength != write(mFd, data, dataLength)) { 371760943b5e7a09b602aba04ec451e97662f48b0a4James Dong err = ERROR_IO; 372760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 373760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 374760943b5e7a09b602aba04ec451e97662f48b0a4James Dong buffer->release(); 375760943b5e7a09b602aba04ec451e97662f48b0a4James Dong buffer = NULL; 376fa514f007bd144eb99cdd68f2fe5302a4508db28James Dong 377fa514f007bd144eb99cdd68f2fe5302a4508db28James Dong if (err != OK) { 378fa514f007bd144eb99cdd68f2fe5302a4508db28James Dong break; 379fa514f007bd144eb99cdd68f2fe5302a4508db28James Dong } 380fa514f007bd144eb99cdd68f2fe5302a4508db28James Dong 381fa514f007bd144eb99cdd68f2fe5302a4508db28James Dong if (stoppedPrematurely) { 382fa514f007bd144eb99cdd68f2fe5302a4508db28James Dong stoppedPrematurely = false; 383fa514f007bd144eb99cdd68f2fe5302a4508db28James Dong } 384fa514f007bd144eb99cdd68f2fe5302a4508db28James Dong } 385fa514f007bd144eb99cdd68f2fe5302a4508db28James Dong 386fa514f007bd144eb99cdd68f2fe5302a4508db28James Dong if ((err == OK || err == ERROR_END_OF_STREAM) && stoppedPrematurely) { 387fa514f007bd144eb99cdd68f2fe5302a4508db28James Dong err = ERROR_MALFORMED; 388760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 389760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 390760943b5e7a09b602aba04ec451e97662f48b0a4James Dong close(mFd); 391760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mFd = -1; 392760943b5e7a09b602aba04ec451e97662f48b0a4James Dong mReachedEOS = true; 393760943b5e7a09b602aba04ec451e97662f48b0a4James Dong if (err == ERROR_END_OF_STREAM) { 394760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return OK; 395760943b5e7a09b602aba04ec451e97662f48b0a4James Dong } 396760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return err; 397760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 398760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 399760943b5e7a09b602aba04ec451e97662f48b0a4James Dongbool AACWriter::reachedEOS() { 400760943b5e7a09b602aba04ec451e97662f48b0a4James Dong return mReachedEOS; 401760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} 402760943b5e7a09b602aba04ec451e97662f48b0a4James Dong 403760943b5e7a09b602aba04ec451e97662f48b0a4James Dong} // namespace android 404