AACEncoder.cpp revision a7d1a2dd776bf356c228785a94ba8e0ff6a2ec7f
1/* 2 * Copyright (C) 2010 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 "AACEncoder" 19#include <utils/Log.h> 20 21#include "AACEncoder.h" 22#include "voAAC.h" 23#include "cmnMemory.h" 24 25#include <media/stagefright/MediaBufferGroup.h> 26#include <media/stagefright/MediaDebug.h> 27#include <media/stagefright/MediaDefs.h> 28#include <media/stagefright/MediaErrors.h> 29#include <media/stagefright/MetaData.h> 30 31namespace android { 32 33AACEncoder::AACEncoder(const sp<MediaSource> &source, const sp<MetaData> &meta) 34 : mSource(source), 35 mMeta(meta), 36 mStarted(false), 37 mBufferGroup(NULL), 38 mInputBuffer(NULL), 39 mEncoderHandle(NULL), 40 mApiHandle(NULL), 41 mMemOperator(NULL) { 42} 43 44status_t AACEncoder::initCheck() { 45 CHECK(mApiHandle == NULL && mEncoderHandle == NULL); 46 CHECK(mMeta->findInt32(kKeySampleRate, &mSampleRate)); 47 CHECK(mMeta->findInt32(kKeyChannelCount, &mChannels)); 48 CHECK(mMeta->findInt32(kKeyBitRate, &mBitRate)); 49 50 mApiHandle = new VO_AUDIO_CODECAPI; 51 CHECK(mApiHandle); 52 53 if (VO_ERR_NONE != voGetAACEncAPI(mApiHandle)) { 54 LOGE("Failed to get api handle"); 55 return UNKNOWN_ERROR; 56 } 57 58 mMemOperator = new VO_MEM_OPERATOR; 59 CHECK(mMemOperator != NULL); 60 mMemOperator->Alloc = cmnMemAlloc; 61 mMemOperator->Copy = cmnMemCopy; 62 mMemOperator->Free = cmnMemFree; 63 mMemOperator->Set = cmnMemSet; 64 mMemOperator->Check = cmnMemCheck; 65 66 VO_CODEC_INIT_USERDATA userData; 67 memset(&userData, 0, sizeof(userData)); 68 userData.memflag = VO_IMF_USERMEMOPERATOR; 69 userData.memData = (VO_PTR) mMemOperator; 70 if (VO_ERR_NONE != mApiHandle->Init(&mEncoderHandle, VO_AUDIO_CodingAAC, &userData)) { 71 LOGE("Failed to init AAC encoder"); 72 return UNKNOWN_ERROR; 73 } 74 if (OK != setAudioSpecificConfigData()) { 75 LOGE("Failed to configure AAC encoder"); 76 return UNKNOWN_ERROR; 77 } 78 79 // Configure AAC encoder$ 80 AACENC_PARAM params; 81 memset(¶ms, 0, sizeof(params)); 82 params.sampleRate = mSampleRate; 83 params.bitRate = mBitRate; 84 params.nChannels = mChannels; 85 params.adtsUsed = 0; // For MP4 file, don't use adts format$ 86 if (VO_ERR_NONE != mApiHandle->SetParam(mEncoderHandle, VO_PID_AAC_ENCPARAM, ¶ms)) { 87 LOGE("Failed to set AAC encoder parameters"); 88 return UNKNOWN_ERROR; 89 } 90 91 return OK; 92} 93 94static status_t getSampleRateTableIndex(int32_t sampleRate, int32_t &index) { 95 static const int32_t kSampleRateTable[] = { 96 96000, 88200, 64000, 48000, 44100, 32000, 97 24000, 22050, 16000, 12000, 11025, 8000 98 }; 99 const int32_t tableSize = sizeof(kSampleRateTable) / sizeof(kSampleRateTable[0]); 100 for (int32_t i = 0; i < tableSize; ++i) { 101 if (sampleRate == kSampleRateTable[i]) { 102 index = i; 103 return OK; 104 } 105 } 106 107 LOGE("Sampling rate %d bps is not supported", sampleRate); 108 return UNKNOWN_ERROR; 109} 110 111status_t AACEncoder::setAudioSpecificConfigData() { 112 LOGV("setAudioSpecificConfigData: %d hz, %d bps, and %d channels", 113 mSampleRate, mBitRate, mChannels); 114 115 int32_t index; 116 CHECK_EQ(OK, getSampleRateTableIndex(mSampleRate, index)); 117 if (mChannels > 2 || mChannels <= 0) { 118 LOGE("Unsupported number of channels(%d)", mChannels); 119 return UNKNOWN_ERROR; 120 } 121 122 // OMX_AUDIO_AACObjectLC 123 mAudioSpecificConfigData[0] = ((0x02 << 3) | (index >> 1)); 124 mAudioSpecificConfigData[1] = ((index & 0x01) << 7) | (mChannels << 3); 125 return OK; 126} 127 128AACEncoder::~AACEncoder() { 129 if (mStarted) { 130 stop(); 131 } 132} 133 134status_t AACEncoder::start(MetaData *params) { 135 CHECK(!mStarted); 136 137 mBufferGroup = new MediaBufferGroup; 138 mBufferGroup->add_buffer(new MediaBuffer(2048)); 139 140 CHECK_EQ(OK, initCheck()); 141 142 mFrameCount = 0; 143 mSource->start(); 144 145 mStarted = true; 146 147 return OK; 148} 149 150status_t AACEncoder::stop() { 151 CHECK(mStarted); 152 153 if (mInputBuffer) { 154 mInputBuffer->release(); 155 mInputBuffer = NULL; 156 } 157 158 delete mBufferGroup; 159 mBufferGroup = NULL; 160 161 mSource->stop(); 162 163 if (mEncoderHandle) { 164 CHECK_EQ(VO_ERR_NONE, mApiHandle->Uninit(mEncoderHandle)); 165 mEncoderHandle = NULL; 166 } 167 delete mApiHandle; 168 mApiHandle = NULL; 169 170 mStarted = false; 171 172 return OK; 173} 174 175sp<MetaData> AACEncoder::getFormat() { 176 sp<MetaData> srcFormat = mSource->getFormat(); 177 178 mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_AAC); 179 180 int64_t durationUs; 181 if (srcFormat->findInt64(kKeyDuration, &durationUs)) { 182 mMeta->setInt64(kKeyDuration, durationUs); 183 } 184 185 mMeta->setCString(kKeyDecoderComponent, "AACEncoder"); 186 187 return mMeta; 188} 189 190status_t AACEncoder::read( 191 MediaBuffer **out, const ReadOptions *options) { 192 status_t err; 193 194 *out = NULL; 195 196 int64_t seekTimeUs; 197 CHECK(options == NULL || !options->getSeekTo(&seekTimeUs)); 198 199 MediaBuffer *buffer; 200 CHECK_EQ(mBufferGroup->acquire_buffer(&buffer), OK); 201 uint8_t *outPtr = (uint8_t *)buffer->data(); 202 203 if (mFrameCount == 0) { 204 memcpy(outPtr, mAudioSpecificConfigData, 2); 205 buffer->set_range(0, 2); 206 buffer->meta_data()->setInt32(kKeyIsCodecConfig, true); 207 *out = buffer; 208 mInputBuffer = NULL; 209 ++mFrameCount; 210 return OK; 211 } else if (mFrameCount == 1) { 212 buffer->meta_data()->setInt32(kKeyIsCodecConfig, false); 213 } 214 215 // XXX: We assume that the input buffer contains at least 216 // (actually, exactly) 1024 PCM samples. This needs to be fixed. 217 if (mInputBuffer == NULL) { 218 if (mSource->read(&mInputBuffer, options) != OK) { 219 LOGE("failed to read from input audio source"); 220 return UNKNOWN_ERROR; 221 } 222 if (mInputBuffer->range_length() == 0) { 223 mInputBuffer->release(); 224 mInputBuffer = NULL; 225 return ERROR_END_OF_STREAM; 226 } 227 VO_CODECBUFFER inputData; 228 memset(&inputData, 0, sizeof(inputData)); 229 inputData.Buffer = (unsigned char*) mInputBuffer->data(); 230 inputData.Length = mInputBuffer->range_length(); 231 CHECK(VO_ERR_NONE == mApiHandle->SetInputData(mEncoderHandle,&inputData)); 232 } 233 234 CHECK(mInputBuffer != NULL); 235 236 VO_CODECBUFFER outputData; 237 memset(&outputData, 0, sizeof(outputData)); 238 VO_AUDIO_OUTPUTINFO outputInfo; 239 memset(&outputInfo, 0, sizeof(outputInfo)); 240 241 VO_U32 ret = VO_ERR_NONE; 242 int32_t outputLength = 0; 243 outputData.Buffer = outPtr; 244 outputData.Length = buffer->size(); 245 ret = mApiHandle->GetOutputData(mEncoderHandle, &outputData, &outputInfo); 246 if (ret == VO_ERR_NONE || ret == VO_ERR_INPUT_BUFFER_SMALL) { 247 outputLength += outputData.Length; 248 if (ret == VO_ERR_INPUT_BUFFER_SMALL) { // All done 249 mInputBuffer->release(); 250 mInputBuffer = NULL; 251 } 252 } else { 253 LOGE("failed to encode the input data 0x%lx", ret); 254 } 255 256 buffer->set_range(0, outputLength); 257 258 // Each output frame compresses 1024 input PCM samples. 259 int64_t timestampUs = ((mFrameCount - 1) * 1000000LL * 1024) / mSampleRate; 260 ++mFrameCount; 261 buffer->meta_data()->setInt64(kKeyTime, timestampUs); 262 263 *out = buffer; 264 return OK; 265} 266 267} // namespace android 268