| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| //#define LOG_NDEBUG 0 |
| #define LOG_TAG "AACEncoder" |
| #include <utils/Log.h> |
| |
| #include "AACEncoder.h" |
| #include "voAAC.h" |
| #include "cmnMemory.h" |
| |
| #include <media/stagefright/foundation/ADebug.h> |
| #include <media/stagefright/MediaBufferGroup.h> |
| #include <media/stagefright/MediaDefs.h> |
| #include <media/stagefright/MediaErrors.h> |
| #include <media/stagefright/MetaData.h> |
| |
| namespace android { |
| |
| AACEncoder::AACEncoder(const sp<IMediaSource> &source, const sp<MetaData> &meta) |
| : mSource(source), |
| mMeta(meta), |
| mStarted(false), |
| mBufferGroup(NULL), |
| mInputBuffer(NULL), |
| mInputFrame(NULL), |
| mEncoderHandle(NULL), |
| mApiHandle(NULL), |
| mMemOperator(NULL) { |
| } |
| |
| status_t AACEncoder::initCheck() { |
| CHECK(mApiHandle == NULL && mEncoderHandle == NULL); |
| CHECK(mMeta->findInt32(kKeySampleRate, &mSampleRate)); |
| CHECK(mMeta->findInt32(kKeyChannelCount, &mChannels)); |
| CHECK(mChannels <= 2 && mChannels >= 1); |
| CHECK(mMeta->findInt32(kKeyBitRate, &mBitRate)); |
| |
| mApiHandle = new VO_AUDIO_CODECAPI; |
| CHECK(mApiHandle); |
| |
| if (VO_ERR_NONE != voGetAACEncAPI(mApiHandle)) { |
| ALOGE("Failed to get api handle"); |
| return UNKNOWN_ERROR; |
| } |
| |
| mMemOperator = new VO_MEM_OPERATOR; |
| CHECK(mMemOperator != NULL); |
| mMemOperator->Alloc = cmnMemAlloc; |
| mMemOperator->Copy = cmnMemCopy; |
| mMemOperator->Free = cmnMemFree; |
| mMemOperator->Set = cmnMemSet; |
| mMemOperator->Check = cmnMemCheck; |
| |
| VO_CODEC_INIT_USERDATA userData; |
| memset(&userData, 0, sizeof(userData)); |
| userData.memflag = VO_IMF_USERMEMOPERATOR; |
| userData.memData = (VO_PTR) mMemOperator; |
| if (VO_ERR_NONE != mApiHandle->Init(&mEncoderHandle, VO_AUDIO_CodingAAC, &userData)) { |
| ALOGE("Failed to init AAC encoder"); |
| return UNKNOWN_ERROR; |
| } |
| if (OK != setAudioSpecificConfigData()) { |
| ALOGE("Failed to configure AAC encoder"); |
| return UNKNOWN_ERROR; |
| } |
| |
| // Configure AAC encoder$ |
| AACENC_PARAM params; |
| memset(¶ms, 0, sizeof(params)); |
| params.sampleRate = mSampleRate; |
| params.bitRate = mBitRate; |
| params.nChannels = mChannels; |
| params.adtsUsed = 0; // We add adts header in the file writer if needed. |
| if (VO_ERR_NONE != mApiHandle->SetParam(mEncoderHandle, VO_PID_AAC_ENCPARAM, ¶ms)) { |
| ALOGE("Failed to set AAC encoder parameters"); |
| return UNKNOWN_ERROR; |
| } |
| |
| return OK; |
| } |
| |
| static status_t getSampleRateTableIndex(int32_t sampleRate, int32_t &index) { |
| static const int32_t kSampleRateTable[] = { |
| 96000, 88200, 64000, 48000, 44100, 32000, |
| 24000, 22050, 16000, 12000, 11025, 8000 |
| }; |
| const int32_t tableSize = sizeof(kSampleRateTable) / sizeof(kSampleRateTable[0]); |
| for (int32_t i = 0; i < tableSize; ++i) { |
| if (sampleRate == kSampleRateTable[i]) { |
| index = i; |
| return OK; |
| } |
| } |
| |
| ALOGE("Sampling rate %d bps is not supported", sampleRate); |
| return UNKNOWN_ERROR; |
| } |
| |
| status_t AACEncoder::setAudioSpecificConfigData() { |
| ALOGV("setAudioSpecificConfigData: %d hz, %d bps, and %d channels", |
| mSampleRate, mBitRate, mChannels); |
| |
| int32_t index = 0; |
| CHECK_EQ((status_t)OK, getSampleRateTableIndex(mSampleRate, index)); |
| if (mChannels > 2 || mChannels <= 0) { |
| ALOGE("Unsupported number of channels(%d)", mChannels); |
| return UNKNOWN_ERROR; |
| } |
| |
| // OMX_AUDIO_AACObjectLC |
| mAudioSpecificConfigData[0] = ((0x02 << 3) | (index >> 1)); |
| mAudioSpecificConfigData[1] = ((index & 0x01) << 7) | (mChannels << 3); |
| return OK; |
| } |
| |
| AACEncoder::~AACEncoder() { |
| if (mStarted) { |
| stop(); |
| } |
| } |
| |
| status_t AACEncoder::start(MetaData *params) { |
| if (mStarted) { |
| ALOGW("Call start() when encoder already started"); |
| return OK; |
| } |
| |
| mBufferGroup = new MediaBufferGroup; |
| mBufferGroup->add_buffer(new MediaBuffer(2048)); |
| |
| CHECK_EQ((status_t)OK, initCheck()); |
| |
| mNumInputSamples = 0; |
| mAnchorTimeUs = 0; |
| mFrameCount = 0; |
| |
| mInputFrame = new int16_t[mChannels * kNumSamplesPerFrame]; |
| CHECK(mInputFrame != NULL); |
| |
| status_t err = mSource->start(params); |
| if (err != OK) { |
| ALOGE("AudioSource is not available"); |
| return err; |
| } |
| |
| mStarted = true; |
| |
| return OK; |
| } |
| |
| status_t AACEncoder::stop() { |
| if (mInputBuffer) { |
| mInputBuffer->release(); |
| mInputBuffer = NULL; |
| } |
| |
| delete mBufferGroup; |
| mBufferGroup = NULL; |
| |
| if (mInputFrame) { |
| delete[] mInputFrame; |
| mInputFrame = NULL; |
| } |
| |
| if (!mStarted) { |
| ALOGW("Call stop() when encoder has not started"); |
| return ERROR_END_OF_STREAM; |
| } |
| |
| mSource->stop(); |
| if (mEncoderHandle) { |
| CHECK_EQ((VO_U32)VO_ERR_NONE, mApiHandle->Uninit(mEncoderHandle)); |
| mEncoderHandle = NULL; |
| } |
| delete mApiHandle; |
| mApiHandle = NULL; |
| |
| delete mMemOperator; |
| mMemOperator = NULL; |
| |
| mStarted = false; |
| |
| return OK; |
| } |
| |
| sp<MetaData> AACEncoder::getFormat() { |
| sp<MetaData> srcFormat = mSource->getFormat(); |
| |
| mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_AUDIO_AAC); |
| |
| int64_t durationUs; |
| if (srcFormat->findInt64(kKeyDuration, &durationUs)) { |
| mMeta->setInt64(kKeyDuration, durationUs); |
| } |
| |
| mMeta->setCString(kKeyDecoderComponent, "AACEncoder"); |
| |
| return mMeta; |
| } |
| |
| status_t AACEncoder::read( |
| MediaBuffer **out, const ReadOptions *options) { |
| *out = NULL; |
| |
| int64_t seekTimeUs; |
| ReadOptions::SeekMode mode; |
| CHECK(options == NULL || !options->getSeekTo(&seekTimeUs, &mode)); |
| |
| MediaBuffer *buffer; |
| CHECK_EQ(mBufferGroup->acquire_buffer(&buffer), (status_t)OK); |
| uint8_t *outPtr = (uint8_t *)buffer->data(); |
| bool readFromSource = false; |
| int64_t wallClockTimeUs = -1; |
| |
| if (mFrameCount == 0) { |
| memcpy(outPtr, mAudioSpecificConfigData, 2); |
| buffer->set_range(0, 2); |
| buffer->meta_data()->setInt32(kKeyIsCodecConfig, true); |
| *out = buffer; |
| ++mFrameCount; |
| return OK; |
| } else if (mFrameCount == 1) { |
| buffer->meta_data()->setInt32(kKeyIsCodecConfig, false); |
| } |
| |
| const int32_t nSamples = mChannels * kNumSamplesPerFrame; |
| while (mNumInputSamples < nSamples) { |
| if (mInputBuffer == NULL) { |
| if (mSource->read(&mInputBuffer, options) != OK) { |
| if (mNumInputSamples == 0) { |
| buffer->release(); |
| return ERROR_END_OF_STREAM; |
| } |
| memset(&mInputFrame[mNumInputSamples], |
| 0, |
| sizeof(int16_t) * (nSamples - mNumInputSamples)); |
| mNumInputSamples = 0; |
| break; |
| } |
| |
| size_t align = mInputBuffer->range_length() % sizeof(int16_t); |
| CHECK_EQ(align, (size_t)0); |
| |
| int64_t timeUs; |
| if (mInputBuffer->meta_data()->findInt64(kKeyDriftTime, &timeUs)) { |
| wallClockTimeUs = timeUs; |
| } |
| if (mInputBuffer->meta_data()->findInt64(kKeyAnchorTime, &timeUs)) { |
| mAnchorTimeUs = timeUs; |
| } |
| readFromSource = true; |
| } else { |
| readFromSource = false; |
| } |
| size_t copy = (nSamples - mNumInputSamples) * sizeof(int16_t); |
| |
| if (copy > mInputBuffer->range_length()) { |
| copy = mInputBuffer->range_length(); |
| } |
| |
| memcpy(&mInputFrame[mNumInputSamples], |
| (const uint8_t *) mInputBuffer->data() |
| + mInputBuffer->range_offset(), |
| copy); |
| |
| mInputBuffer->set_range( |
| mInputBuffer->range_offset() + copy, |
| mInputBuffer->range_length() - copy); |
| |
| if (mInputBuffer->range_length() == 0) { |
| mInputBuffer->release(); |
| mInputBuffer = NULL; |
| } |
| mNumInputSamples += copy / sizeof(int16_t); |
| if (mNumInputSamples >= nSamples) { |
| mNumInputSamples %= nSamples; |
| break; |
| } |
| } |
| |
| VO_CODECBUFFER inputData; |
| memset(&inputData, 0, sizeof(inputData)); |
| inputData.Buffer = (unsigned char*) mInputFrame; |
| inputData.Length = nSamples * sizeof(int16_t); |
| CHECK((VO_U32)VO_ERR_NONE == mApiHandle->SetInputData(mEncoderHandle,&inputData)); |
| |
| VO_CODECBUFFER outputData; |
| memset(&outputData, 0, sizeof(outputData)); |
| VO_AUDIO_OUTPUTINFO outputInfo; |
| memset(&outputInfo, 0, sizeof(outputInfo)); |
| |
| VO_U32 ret = VO_ERR_NONE; |
| size_t nOutputBytes = 0; |
| do { |
| outputData.Buffer = outPtr; |
| outputData.Length = buffer->size() - nOutputBytes; |
| ret = mApiHandle->GetOutputData(mEncoderHandle, &outputData, &outputInfo); |
| if (ret == VO_ERR_NONE) { |
| outPtr += outputData.Length; |
| nOutputBytes += outputData.Length; |
| } |
| } while (ret != VO_ERR_INPUT_BUFFER_SMALL); |
| buffer->set_range(0, nOutputBytes); |
| |
| int64_t mediaTimeUs = |
| ((mFrameCount - 1) * 1000000LL * kNumSamplesPerFrame) / mSampleRate; |
| |
| buffer->meta_data()->setInt64(kKeyTime, mAnchorTimeUs + mediaTimeUs); |
| if (readFromSource && wallClockTimeUs != -1) { |
| buffer->meta_data()->setInt64(kKeyDriftTime, mediaTimeUs - wallClockTimeUs); |
| } |
| ++mFrameCount; |
| |
| *out = buffer; |
| return OK; |
| } |
| |
| } // namespace android |
