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 mInputFrame(NULL), 40 mEncoderHandle(NULL), 41 mApiHandle(NULL), 42 mMemOperator(NULL) { 43} 44 45status_t AACEncoder::initCheck() { 46 CHECK(mApiHandle == NULL && mEncoderHandle == NULL); 47 CHECK(mMeta->findInt32(kKeySampleRate, &mSampleRate)); 48 CHECK(mMeta->findInt32(kKeyChannelCount, &mChannels)); 49 CHECK(mChannels <= 2 && mChannels >= 1); 50 CHECK(mMeta->findInt32(kKeyBitRate, &mBitRate)); 51 52 mApiHandle = new VO_AUDIO_CODECAPI; 53 CHECK(mApiHandle); 54 55 if (VO_ERR_NONE != voGetAACEncAPI(mApiHandle)) { 56 LOGE("Failed to get api handle"); 57 return UNKNOWN_ERROR; 58 } 59 60 mMemOperator = new VO_MEM_OPERATOR; 61 CHECK(mMemOperator != NULL); 62 mMemOperator->Alloc = cmnMemAlloc; 63 mMemOperator->Copy = cmnMemCopy; 64 mMemOperator->Free = cmnMemFree; 65 mMemOperator->Set = cmnMemSet; 66 mMemOperator->Check = cmnMemCheck; 67 68 VO_CODEC_INIT_USERDATA userData; 69 memset(&userData, 0, sizeof(userData)); 70 userData.memflag = VO_IMF_USERMEMOPERATOR; 71 userData.memData = (VO_PTR) mMemOperator; 72 if (VO_ERR_NONE != mApiHandle->Init(&mEncoderHandle, VO_AUDIO_CodingAAC, &userData)) { 73 LOGE("Failed to init AAC encoder"); 74 return UNKNOWN_ERROR; 75 } 76 if (OK != setAudioSpecificConfigData()) { 77 LOGE("Failed to configure AAC encoder"); 78 return UNKNOWN_ERROR; 79 } 80 81 // Configure AAC encoder$ 82 AACENC_PARAM params; 83 memset(¶ms, 0, sizeof(params)); 84 params.sampleRate = mSampleRate; 85 params.bitRate = mBitRate; 86 params.nChannels = mChannels; 87 params.adtsUsed = 0; // We add adts header in the file writer if needed. 88 if (VO_ERR_NONE != mApiHandle->SetParam(mEncoderHandle, VO_PID_AAC_ENCPARAM, ¶ms)) { 89 LOGE("Failed to set AAC encoder parameters"); 90 return UNKNOWN_ERROR; 91 } 92 93 return OK; 94} 95 96static status_t getSampleRateTableIndex(int32_t sampleRate, int32_t &index) { 97 static const int32_t kSampleRateTable[] = { 98 96000, 88200, 64000, 48000, 44100, 32000, 99 24000, 22050, 16000, 12000, 11025, 8000 100 }; 101 const int32_t tableSize = sizeof(kSampleRateTable) / sizeof(kSampleRateTable[0]); 102 for (int32_t i = 0; i < tableSize; ++i) { 103 if (sampleRate == kSampleRateTable[i]) { 104 index = i; 105 return OK; 106 } 107 } 108 109 LOGE("Sampling rate %d bps is not supported", sampleRate); 110 return UNKNOWN_ERROR; 111} 112 113status_t AACEncoder::setAudioSpecificConfigData() { 114 LOGV("setAudioSpecificConfigData: %d hz, %d bps, and %d channels", 115 mSampleRate, mBitRate, mChannels); 116 117 int32_t index; 118 CHECK_EQ(OK, getSampleRateTableIndex(mSampleRate, index)); 119 if (mChannels > 2 || mChannels <= 0) { 120 LOGE("Unsupported number of channels(%d)", mChannels); 121 return UNKNOWN_ERROR; 122 } 123 124 // OMX_AUDIO_AACObjectLC 125 mAudioSpecificConfigData[0] = ((0x02 << 3) | (index >> 1)); 126 mAudioSpecificConfigData[1] = ((index & 0x01) << 7) | (mChannels << 3); 127 return OK; 128} 129 130AACEncoder::~AACEncoder() { 131 if (mStarted) { 132 stop(); 133 } 134} 135 136status_t AACEncoder::start(MetaData *params) { 137 if (mStarted) { 138 LOGW("Call start() when encoder already started"); 139 return OK; 140 } 141 142 mBufferGroup = new MediaBufferGroup; 143 mBufferGroup->add_buffer(new MediaBuffer(2048)); 144 145 CHECK_EQ(OK, initCheck()); 146 147 mNumInputSamples = 0; 148 mAnchorTimeUs = 0; 149 mFrameCount = 0; 150 151 mInputFrame = new int16_t[mChannels * kNumSamplesPerFrame]; 152 CHECK(mInputFrame != NULL); 153 154 status_t err = mSource->start(params); 155 if (err != OK) { 156 LOGE("AudioSource is not available"); 157 return err; 158 } 159 160 mStarted = true; 161 162 return OK; 163} 164 165status_t AACEncoder::stop() { 166 if (mInputBuffer) { 167 mInputBuffer->release(); 168 mInputBuffer = NULL; 169 } 170 171 delete mBufferGroup; 172 mBufferGroup = NULL; 173 174 if (mInputFrame) { 175 delete[] mInputFrame; 176 mInputFrame = NULL; 177 } 178 179 if (!mStarted) { 180 LOGW("Call stop() when encoder has not started"); 181 return ERROR_END_OF_STREAM; 182 } 183 184 mSource->stop(); 185 if (mEncoderHandle) { 186 CHECK_EQ(VO_ERR_NONE, mApiHandle->Uninit(mEncoderHandle)); 187 mEncoderHandle = NULL; 188 } 189 delete mApiHandle; 190 mApiHandle = NULL; 191 192 delete mMemOperator; 193 mMemOperator = NULL; 194 195 mStarted = false; 196 197 return OK; 198} 199 200sp<MetaData> AACEncoder::getFormat() { 201 sp<MetaData> srcFormat = mSource->getFormat(); 202 203 mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_AAC); 204 205 int64_t durationUs; 206 if (srcFormat->findInt64(kKeyDuration, &durationUs)) { 207 mMeta->setInt64(kKeyDuration, durationUs); 208 } 209 210 mMeta->setCString(kKeyDecoderComponent, "AACEncoder"); 211 212 return mMeta; 213} 214 215status_t AACEncoder::read( 216 MediaBuffer **out, const ReadOptions *options) { 217 status_t err; 218 219 *out = NULL; 220 221 int64_t seekTimeUs; 222 ReadOptions::SeekMode mode; 223 CHECK(options == NULL || !options->getSeekTo(&seekTimeUs, &mode)); 224 225 MediaBuffer *buffer; 226 CHECK_EQ(mBufferGroup->acquire_buffer(&buffer), OK); 227 uint8_t *outPtr = (uint8_t *)buffer->data(); 228 bool readFromSource = false; 229 int64_t wallClockTimeUs = -1; 230 231 if (mFrameCount == 0) { 232 memcpy(outPtr, mAudioSpecificConfigData, 2); 233 buffer->set_range(0, 2); 234 buffer->meta_data()->setInt32(kKeyIsCodecConfig, true); 235 *out = buffer; 236 ++mFrameCount; 237 return OK; 238 } else if (mFrameCount == 1) { 239 buffer->meta_data()->setInt32(kKeyIsCodecConfig, false); 240 } 241 242 const int32_t nSamples = mChannels * kNumSamplesPerFrame; 243 while (mNumInputSamples < nSamples) { 244 if (mInputBuffer == NULL) { 245 if (mSource->read(&mInputBuffer, options) != OK) { 246 if (mNumInputSamples == 0) { 247 buffer->release(); 248 return ERROR_END_OF_STREAM; 249 } 250 memset(&mInputFrame[mNumInputSamples], 251 0, 252 sizeof(int16_t) * (nSamples - mNumInputSamples)); 253 mNumInputSamples = 0; 254 break; 255 } 256 257 size_t align = mInputBuffer->range_length() % sizeof(int16_t); 258 CHECK_EQ(align, 0); 259 260 int64_t timeUs; 261 if (mInputBuffer->meta_data()->findInt64(kKeyDriftTime, &timeUs)) { 262 wallClockTimeUs = timeUs; 263 } 264 if (mInputBuffer->meta_data()->findInt64(kKeyAnchorTime, &timeUs)) { 265 mAnchorTimeUs = timeUs; 266 } 267 readFromSource = true; 268 } else { 269 readFromSource = false; 270 } 271 size_t copy = (nSamples - mNumInputSamples) * sizeof(int16_t); 272 273 if (copy > mInputBuffer->range_length()) { 274 copy = mInputBuffer->range_length(); 275 } 276 277 memcpy(&mInputFrame[mNumInputSamples], 278 (const uint8_t *) mInputBuffer->data() 279 + mInputBuffer->range_offset(), 280 copy); 281 282 mInputBuffer->set_range( 283 mInputBuffer->range_offset() + copy, 284 mInputBuffer->range_length() - copy); 285 286 if (mInputBuffer->range_length() == 0) { 287 mInputBuffer->release(); 288 mInputBuffer = NULL; 289 } 290 mNumInputSamples += copy / sizeof(int16_t); 291 if (mNumInputSamples >= nSamples) { 292 mNumInputSamples %= nSamples; 293 break; 294 } 295 } 296 297 VO_CODECBUFFER inputData; 298 memset(&inputData, 0, sizeof(inputData)); 299 inputData.Buffer = (unsigned char*) mInputFrame; 300 inputData.Length = nSamples * sizeof(int16_t); 301 CHECK(VO_ERR_NONE == mApiHandle->SetInputData(mEncoderHandle,&inputData)); 302 303 VO_CODECBUFFER outputData; 304 memset(&outputData, 0, sizeof(outputData)); 305 VO_AUDIO_OUTPUTINFO outputInfo; 306 memset(&outputInfo, 0, sizeof(outputInfo)); 307 308 VO_U32 ret = VO_ERR_NONE; 309 size_t nOutputBytes = 0; 310 do { 311 outputData.Buffer = outPtr; 312 outputData.Length = buffer->size() - nOutputBytes; 313 ret = mApiHandle->GetOutputData(mEncoderHandle, &outputData, &outputInfo); 314 if (ret == VO_ERR_NONE) { 315 outPtr += outputData.Length; 316 nOutputBytes += outputData.Length; 317 } 318 } while (ret != VO_ERR_INPUT_BUFFER_SMALL); 319 buffer->set_range(0, nOutputBytes); 320 321 int64_t mediaTimeUs = 322 ((mFrameCount - 1) * 1000000LL * kNumSamplesPerFrame) / mSampleRate; 323 324 buffer->meta_data()->setInt64(kKeyTime, mAnchorTimeUs + mediaTimeUs); 325 if (readFromSource && wallClockTimeUs != -1) { 326 buffer->meta_data()->setInt64(kKeyDriftTime, mediaTimeUs - wallClockTimeUs); 327 } 328 ++mFrameCount; 329 330 *out = buffer; 331 return OK; 332} 333 334} // namespace android 335