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/*
* Copyright (C) 2011 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 "SoftAAC"
#include <utils/Log.h>
#include "SoftAAC.h"
#include "pvmp4audiodecoder_api.h"
#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/foundation/hexdump.h>
namespace android {
template<class T>
static void InitOMXParams(T *params) {
params->nSize = sizeof(T);
params->nVersion.s.nVersionMajor = 1;
params->nVersion.s.nVersionMinor = 0;
params->nVersion.s.nRevision = 0;
params->nVersion.s.nStep = 0;
}
SoftAAC::SoftAAC(
const char *name,
const OMX_CALLBACKTYPE *callbacks,
OMX_PTR appData,
OMX_COMPONENTTYPE **component)
: SimpleSoftOMXComponent(name, callbacks, appData, component),
mConfig(new tPVMP4AudioDecoderExternal),
mIsADTS(false),
mDecoderBuf(NULL),
mInputBufferCount(0),
mUpsamplingFactor(2),
mAnchorTimeUs(0),
mNumSamplesOutput(0),
mSignalledError(false),
mOutputPortSettingsChange(NONE) {
initPorts();
CHECK_EQ(initDecoder(), (status_t)OK);
}
SoftAAC::~SoftAAC() {
free(mDecoderBuf);
mDecoderBuf = NULL;
delete mConfig;
mConfig = NULL;
}
void SoftAAC::initPorts() {
OMX_PARAM_PORTDEFINITIONTYPE def;
InitOMXParams(&def);
def.nPortIndex = 0;
def.eDir = OMX_DirInput;
def.nBufferCountMin = kNumInputBuffers;
def.nBufferCountActual = def.nBufferCountMin;
def.nBufferSize = 8192;
def.bEnabled = OMX_TRUE;
def.bPopulated = OMX_FALSE;
def.eDomain = OMX_PortDomainAudio;
def.bBuffersContiguous = OMX_FALSE;
def.nBufferAlignment = 1;
def.format.audio.cMIMEType = const_cast<char *>("audio/aac");
def.format.audio.pNativeRender = NULL;
def.format.audio.bFlagErrorConcealment = OMX_FALSE;
def.format.audio.eEncoding = OMX_AUDIO_CodingAAC;
addPort(def);
def.nPortIndex = 1;
def.eDir = OMX_DirOutput;
def.nBufferCountMin = kNumOutputBuffers;
def.nBufferCountActual = def.nBufferCountMin;
def.nBufferSize = 8192;
def.bEnabled = OMX_TRUE;
def.bPopulated = OMX_FALSE;
def.eDomain = OMX_PortDomainAudio;
def.bBuffersContiguous = OMX_FALSE;
def.nBufferAlignment = 2;
def.format.audio.cMIMEType = const_cast<char *>("audio/raw");
def.format.audio.pNativeRender = NULL;
def.format.audio.bFlagErrorConcealment = OMX_FALSE;
def.format.audio.eEncoding = OMX_AUDIO_CodingPCM;
addPort(def);
}
status_t SoftAAC::initDecoder() {
memset(mConfig, 0, sizeof(tPVMP4AudioDecoderExternal));
mConfig->outputFormat = OUTPUTFORMAT_16PCM_INTERLEAVED;
mConfig->aacPlusEnabled = 1;
// The software decoder doesn't properly support mono output on
// AACplus files. Always output stereo.
mConfig->desiredChannels = 2;
UInt32 memRequirements = PVMP4AudioDecoderGetMemRequirements();
mDecoderBuf = malloc(memRequirements);
Int err = PVMP4AudioDecoderInitLibrary(mConfig, mDecoderBuf);
if (err != MP4AUDEC_SUCCESS) {
ALOGE("Failed to initialize MP4 audio decoder");
return UNKNOWN_ERROR;
}
return OK;
}
OMX_ERRORTYPE SoftAAC::internalGetParameter(
OMX_INDEXTYPE index, OMX_PTR params) {
switch (index) {
case OMX_IndexParamAudioAac:
{
OMX_AUDIO_PARAM_AACPROFILETYPE *aacParams =
(OMX_AUDIO_PARAM_AACPROFILETYPE *)params;
if (aacParams->nPortIndex != 0) {
return OMX_ErrorUndefined;
}
aacParams->nBitRate = 0;
aacParams->nAudioBandWidth = 0;
aacParams->nAACtools = 0;
aacParams->nAACERtools = 0;
aacParams->eAACProfile = OMX_AUDIO_AACObjectMain;
aacParams->eAACStreamFormat =
mIsADTS
? OMX_AUDIO_AACStreamFormatMP4ADTS
: OMX_AUDIO_AACStreamFormatMP4FF;
aacParams->eChannelMode = OMX_AUDIO_ChannelModeStereo;
if (!isConfigured()) {
aacParams->nChannels = 1;
aacParams->nSampleRate = 44100;
aacParams->nFrameLength = 0;
} else {
aacParams->nChannels = mConfig->encodedChannels;
aacParams->nSampleRate = mConfig->samplingRate;
aacParams->nFrameLength = mConfig->frameLength;
}
return OMX_ErrorNone;
}
case OMX_IndexParamAudioPcm:
{
OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams =
(OMX_AUDIO_PARAM_PCMMODETYPE *)params;
if (pcmParams->nPortIndex != 1) {
return OMX_ErrorUndefined;
}
pcmParams->eNumData = OMX_NumericalDataSigned;
pcmParams->eEndian = OMX_EndianBig;
pcmParams->bInterleaved = OMX_TRUE;
pcmParams->nBitPerSample = 16;
pcmParams->ePCMMode = OMX_AUDIO_PCMModeLinear;
pcmParams->eChannelMapping[0] = OMX_AUDIO_ChannelLF;
pcmParams->eChannelMapping[1] = OMX_AUDIO_ChannelRF;
if (!isConfigured()) {
pcmParams->nChannels = 1;
pcmParams->nSamplingRate = 44100;
} else {
pcmParams->nChannels = mConfig->desiredChannels;
pcmParams->nSamplingRate = mConfig->samplingRate;
}
return OMX_ErrorNone;
}
default:
return SimpleSoftOMXComponent::internalGetParameter(index, params);
}
}
OMX_ERRORTYPE SoftAAC::internalSetParameter(
OMX_INDEXTYPE index, const OMX_PTR params) {
switch (index) {
case OMX_IndexParamStandardComponentRole:
{
const OMX_PARAM_COMPONENTROLETYPE *roleParams =
(const OMX_PARAM_COMPONENTROLETYPE *)params;
if (strncmp((const char *)roleParams->cRole,
"audio_decoder.aac",
OMX_MAX_STRINGNAME_SIZE - 1)) {
return OMX_ErrorUndefined;
}
return OMX_ErrorNone;
}
case OMX_IndexParamAudioAac:
{
const OMX_AUDIO_PARAM_AACPROFILETYPE *aacParams =
(const OMX_AUDIO_PARAM_AACPROFILETYPE *)params;
if (aacParams->nPortIndex != 0) {
return OMX_ErrorUndefined;
}
if (aacParams->eAACStreamFormat == OMX_AUDIO_AACStreamFormatMP4FF) {
mIsADTS = false;
} else if (aacParams->eAACStreamFormat
== OMX_AUDIO_AACStreamFormatMP4ADTS) {
mIsADTS = true;
} else {
return OMX_ErrorUndefined;
}
return OMX_ErrorNone;
}
case OMX_IndexParamAudioPcm:
{
const OMX_AUDIO_PARAM_PCMMODETYPE *pcmParams =
(OMX_AUDIO_PARAM_PCMMODETYPE *)params;
if (pcmParams->nPortIndex != 1) {
return OMX_ErrorUndefined;
}
return OMX_ErrorNone;
}
default:
return SimpleSoftOMXComponent::internalSetParameter(index, params);
}
}
bool SoftAAC::isConfigured() const {
return mInputBufferCount > 0;
}
void SoftAAC::onQueueFilled(OMX_U32 portIndex) {
if (mSignalledError || mOutputPortSettingsChange != NONE) {
return;
}
List<BufferInfo *> &inQueue = getPortQueue(0);
List<BufferInfo *> &outQueue = getPortQueue(1);
if (portIndex == 0 && mInputBufferCount == 0) {
++mInputBufferCount;
BufferInfo *info = *inQueue.begin();
OMX_BUFFERHEADERTYPE *header = info->mHeader;
mConfig->pInputBuffer = header->pBuffer + header->nOffset;
mConfig->inputBufferCurrentLength = header->nFilledLen;
mConfig->inputBufferMaxLength = 0;
Int err = PVMP4AudioDecoderConfig(mConfig, mDecoderBuf);
if (err != MP4AUDEC_SUCCESS) {
mSignalledError = true;
notify(OMX_EventError, OMX_ErrorUndefined, err, NULL);
return;
}
inQueue.erase(inQueue.begin());
info->mOwnedByUs = false;
notifyEmptyBufferDone(header);
notify(OMX_EventPortSettingsChanged, 1, 0, NULL);
mOutputPortSettingsChange = AWAITING_DISABLED;
return;
}
while (!inQueue.empty() && !outQueue.empty()) {
BufferInfo *inInfo = *inQueue.begin();
OMX_BUFFERHEADERTYPE *inHeader = inInfo->mHeader;
BufferInfo *outInfo = *outQueue.begin();
OMX_BUFFERHEADERTYPE *outHeader = outInfo->mHeader;
if (inHeader->nFlags & OMX_BUFFERFLAG_EOS) {
inQueue.erase(inQueue.begin());
inInfo->mOwnedByUs = false;
notifyEmptyBufferDone(inHeader);
outHeader->nFilledLen = 0;
outHeader->nFlags = OMX_BUFFERFLAG_EOS;
outQueue.erase(outQueue.begin());
outInfo->mOwnedByUs = false;
notifyFillBufferDone(outHeader);
return;
}
if (inHeader->nOffset == 0) {
mAnchorTimeUs = inHeader->nTimeStamp;
mNumSamplesOutput = 0;
}
size_t adtsHeaderSize = 0;
if (mIsADTS) {
// skip 30 bits, aac_frame_length follows.
// ssssssss ssssiiip ppffffPc ccohCCll llllllll lll?????
const uint8_t *adtsHeader = inHeader->pBuffer + inHeader->nOffset;
CHECK_GE(inHeader->nFilledLen, 7);
bool protectionAbsent = (adtsHeader[1] & 1);
unsigned aac_frame_length =
((adtsHeader[3] & 3) << 11)
| (adtsHeader[4] << 3)
| (adtsHeader[5] >> 5);
CHECK_GE(inHeader->nFilledLen, aac_frame_length);
adtsHeaderSize = (protectionAbsent ? 7 : 9);
mConfig->pInputBuffer = (UChar *)adtsHeader + adtsHeaderSize;
mConfig->inputBufferCurrentLength = aac_frame_length - adtsHeaderSize;
inHeader->nOffset += adtsHeaderSize;
inHeader->nFilledLen -= adtsHeaderSize;
} else {
mConfig->pInputBuffer = inHeader->pBuffer + inHeader->nOffset;
mConfig->inputBufferCurrentLength = inHeader->nFilledLen;
}
mConfig->inputBufferMaxLength = 0;
mConfig->inputBufferUsedLength = 0;
mConfig->remainderBits = 0;
mConfig->pOutputBuffer =
reinterpret_cast<Int16 *>(outHeader->pBuffer + outHeader->nOffset);
mConfig->pOutputBuffer_plus = &mConfig->pOutputBuffer[2048];
mConfig->repositionFlag = false;
Int32 prevSamplingRate = mConfig->samplingRate;
Int decoderErr = PVMP4AudioDecodeFrame(mConfig, mDecoderBuf);
/*
* AAC+/eAAC+ streams can be signalled in two ways: either explicitly
* or implicitly, according to MPEG4 spec. AAC+/eAAC+ is a dual
* rate system and the sampling rate in the final output is actually
* doubled compared with the core AAC decoder sampling rate.
*
* Explicit signalling is done by explicitly defining SBR audio object
* type in the bitstream. Implicit signalling is done by embedding
* SBR content in AAC extension payload specific to SBR, and hence
* requires an AAC decoder to perform pre-checks on actual audio frames.
*
* Thus, we could not say for sure whether a stream is
* AAC+/eAAC+ until the first data frame is decoded.
*/
if (decoderErr == MP4AUDEC_SUCCESS && mInputBufferCount <= 2) {
ALOGV("audio/extended audio object type: %d + %d",
mConfig->audioObjectType, mConfig->extendedAudioObjectType);
ALOGV("aac+ upsampling factor: %d desired channels: %d",
mConfig->aacPlusUpsamplingFactor, mConfig->desiredChannels);
if (mInputBufferCount == 1) {
mUpsamplingFactor = mConfig->aacPlusUpsamplingFactor;
// Check on the sampling rate to see whether it is changed.
if (mConfig->samplingRate != prevSamplingRate) {
ALOGW("Sample rate was %d Hz, but now is %d Hz",
prevSamplingRate, mConfig->samplingRate);
// We'll hold onto the input buffer and will decode
// it again once the output port has been reconfigured.
// We're going to want to revisit this input buffer, but
// may have already advanced the offset. Undo that if
// necessary.
inHeader->nOffset -= adtsHeaderSize;
inHeader->nFilledLen += adtsHeaderSize;
notify(OMX_EventPortSettingsChanged, 1, 0, NULL);
mOutputPortSettingsChange = AWAITING_DISABLED;
return;
}
} else { // mInputBufferCount == 2
if (mConfig->extendedAudioObjectType == MP4AUDIO_AAC_LC ||
mConfig->extendedAudioObjectType == MP4AUDIO_LTP) {
if (mUpsamplingFactor == 2) {
// The stream turns out to be not aacPlus mode anyway
ALOGW("Disable AAC+/eAAC+ since extended audio object "
"type is %d",
mConfig->extendedAudioObjectType);
mConfig->aacPlusEnabled = 0;
}
} else {
if (mUpsamplingFactor == 1) {
// aacPlus mode does not buy us anything, but to cause
// 1. CPU load to increase, and
// 2. a half speed of decoding
ALOGW("Disable AAC+/eAAC+ since upsampling factor is 1");
mConfig->aacPlusEnabled = 0;
}
}
}
}
size_t numOutBytes =
mConfig->frameLength * sizeof(int16_t) * mConfig->desiredChannels;
if (decoderErr == MP4AUDEC_SUCCESS) {
CHECK_LE(mConfig->inputBufferUsedLength, inHeader->nFilledLen);
inHeader->nFilledLen -= mConfig->inputBufferUsedLength;
inHeader->nOffset += mConfig->inputBufferUsedLength;
} else {
ALOGW("AAC decoder returned error %d, substituting silence",
decoderErr);
memset(outHeader->pBuffer + outHeader->nOffset, 0, numOutBytes);
// Discard input buffer.
inHeader->nFilledLen = 0;
// fall through
}
if (decoderErr == MP4AUDEC_SUCCESS || mNumSamplesOutput > 0) {
// We'll only output data if we successfully decoded it or
// we've previously decoded valid data, in the latter case
// (decode failed) we'll output a silent frame.
if (mUpsamplingFactor == 2) {
if (mConfig->desiredChannels == 1) {
memcpy(&mConfig->pOutputBuffer[1024],
&mConfig->pOutputBuffer[2048],
numOutBytes * 2);
}
numOutBytes *= 2;
}
outHeader->nFilledLen = numOutBytes;
outHeader->nFlags = 0;
outHeader->nTimeStamp =
mAnchorTimeUs
+ (mNumSamplesOutput * 1000000ll) / mConfig->samplingRate;
mNumSamplesOutput += mConfig->frameLength * mUpsamplingFactor;
outInfo->mOwnedByUs = false;
outQueue.erase(outQueue.begin());
outInfo = NULL;
notifyFillBufferDone(outHeader);
outHeader = NULL;
}
if (inHeader->nFilledLen == 0) {
inInfo->mOwnedByUs = false;
inQueue.erase(inQueue.begin());
inInfo = NULL;
notifyEmptyBufferDone(inHeader);
inHeader = NULL;
}
if (decoderErr == MP4AUDEC_SUCCESS) {
++mInputBufferCount;
}
}
}
void SoftAAC::onPortFlushCompleted(OMX_U32 portIndex) {
if (portIndex == 0) {
// Make sure that the next buffer output does not still
// depend on fragments from the last one decoded.
PVMP4AudioDecoderResetBuffer(mDecoderBuf);
}
}
void SoftAAC::onPortEnableCompleted(OMX_U32 portIndex, bool enabled) {
if (portIndex != 1) {
return;
}
switch (mOutputPortSettingsChange) {
case NONE:
break;
case AWAITING_DISABLED:
{
CHECK(!enabled);
mOutputPortSettingsChange = AWAITING_ENABLED;
break;
}
default:
{
CHECK_EQ((int)mOutputPortSettingsChange, (int)AWAITING_ENABLED);
CHECK(enabled);
mOutputPortSettingsChange = NONE;
break;
}
}
}
} // namespace android
android::SoftOMXComponent *createSoftOMXComponent(
const char *name, const OMX_CALLBACKTYPE *callbacks,
OMX_PTR appData, OMX_COMPONENTTYPE **component) {
return new android::SoftAAC(name, callbacks, appData, component);
}
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