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/*
* 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/MediaBufferGroup.h>
#include <media/stagefright/MediaDebug.h>
#include <media/stagefright/MediaDefs.h>
#include <media/stagefright/MediaErrors.h>
#include <media/stagefright/MetaData.h>
namespace android {
AACEncoder::AACEncoder(const sp<MediaSource> &source, const sp<MetaData> &meta)
: mSource(source),
mMeta(meta),
mStarted(false),
mBufferGroup(NULL),
mInputBuffer(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(mMeta->findInt32(kKeyBitRate, &mBitRate));
mApiHandle = new VO_AUDIO_CODECAPI;
CHECK(mApiHandle);
if (VO_ERR_NONE != voGetAACEncAPI(mApiHandle)) {
LOGE("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)) {
LOGE("Failed to init AAC encoder");
return UNKNOWN_ERROR;
}
if (OK != setAudioSpecificConfigData()) {
LOGE("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; // For MP4 file, don't use adts format$
if (VO_ERR_NONE != mApiHandle->SetParam(mEncoderHandle, VO_PID_AAC_ENCPARAM, ¶ms)) {
LOGE("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;
}
}
LOGE("Sampling rate %d bps is not supported", sampleRate);
return UNKNOWN_ERROR;
}
status_t AACEncoder::setAudioSpecificConfigData() {
LOGV("setAudioSpecificConfigData: %d hz, %d bps, and %d channels",
mSampleRate, mBitRate, mChannels);
int32_t index;
CHECK_EQ(OK, getSampleRateTableIndex(mSampleRate, index));
if (mChannels > 2 || mChannels <= 0) {
LOGE("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) {
LOGW("Call start() when encoder already started");
return OK;
}
mBufferGroup = new MediaBufferGroup;
mBufferGroup->add_buffer(new MediaBuffer(2048));
CHECK_EQ(OK, initCheck());
mNumInputSamples = 0;
mAnchorTimeUs = 0;
mFrameCount = 0;
mSource->start(params);
mStarted = true;
return OK;
}
status_t AACEncoder::stop() {
if (!mStarted) {
LOGW("Call stop() when encoder has not started");
return OK;
}
if (mInputBuffer) {
mInputBuffer->release();
mInputBuffer = NULL;
}
delete mBufferGroup;
mBufferGroup = NULL;
mSource->stop();
if (mEncoderHandle) {
CHECK_EQ(VO_ERR_NONE, mApiHandle->Uninit(mEncoderHandle));
mEncoderHandle = NULL;
}
delete mApiHandle;
mApiHandle = 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) {
status_t err;
*out = NULL;
int64_t seekTimeUs;
ReadOptions::SeekMode mode;
CHECK(options == NULL || !options->getSeekTo(&seekTimeUs, &mode));
MediaBuffer *buffer;
CHECK_EQ(mBufferGroup->acquire_buffer(&buffer), OK);
uint8_t *outPtr = (uint8_t *)buffer->data();
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);
}
while (mNumInputSamples < kNumSamplesPerFrame) {
if (mInputBuffer == NULL) {
if (mSource->read(&mInputBuffer, options) != OK) {
if (mNumInputSamples == 0) {
return ERROR_END_OF_STREAM;
}
memset(&mInputFrame[mNumInputSamples],
0,
sizeof(int16_t) * (kNumSamplesPerFrame - mNumInputSamples));
mNumInputSamples = 0;
break;
}
size_t align = mInputBuffer->range_length() % sizeof(int16_t);
CHECK_EQ(align, 0);
int64_t timeUs;
if (mInputBuffer->meta_data()->findInt64(kKeyTime, &timeUs)) {
mAnchorTimeUs = timeUs;
}
}
size_t copy =
(kNumSamplesPerFrame - 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 >= kNumSamplesPerFrame) {
mNumInputSamples %= kNumSamplesPerFrame;
break;
}
}
VO_CODECBUFFER inputData;
memset(&inputData, 0, sizeof(inputData));
inputData.Buffer = (unsigned char*) mInputFrame;
inputData.Length = kNumSamplesPerFrame * sizeof(int16_t);
CHECK(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;
outputData.Buffer = outPtr;
outputData.Length = buffer->size();
ret = mApiHandle->GetOutputData(mEncoderHandle, &outputData, &outputInfo);
CHECK(ret == VO_ERR_NONE || ret == VO_ERR_INPUT_BUFFER_SMALL);
CHECK(outputData.Length != 0);
buffer->set_range(0, outputData.Length);
int64_t timestampUs = ((mFrameCount - 1) * 1000000LL * kNumSamplesPerFrame) / mSampleRate;
++mFrameCount;
buffer->meta_data()->setInt64(kKeyTime, timestampUs);
*out = buffer;
return OK;
}
} // namespace android
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