static int init(sh_audio_t *sh){
int pos = 0;
int32_t result = HXR_OK;
uint16_t *temp;
uint8_t *inBuf;
int in_len;
int32_t NumChannels, SampleRate;
hAACDecoder = (HAACDecoder *)AACInitDecoder();
ga_config_data configData;
int i;
if (!hAACDecoder) {
printf(" *** Error initializing decoder ***\n");
return 0;
}
if(!sh->codecdata_len && sh->wf) {
sh->codecdata_len = sh->wf->cbSize;
sh->codecdata = (char*)(sh->wf+1);
mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"realaac: codecdata extracted from WAVEFORMATEX\n");
}
if(!sh->codecdata_len){
//return 0;
sh->a_in_buffer_len = demux_read_data(sh->ds, sh->a_in_buffer, sh->a_in_buffer_size);
inBuf = sh->a_in_buffer;
in_len = sh->a_in_buffer_len;
temp = (uint16_t *)malloc(sizeof(uint16_t) * sh->audio_out_minsize);
/* decode ADTS frame from opaque data to get config data */
result = AACDecode(hAACDecoder, &inBuf, &in_len, temp);
free(temp);
if (result != HXR_OK)
{
return 0;
}
/* get the config data struct from the decoder */
AACGetLastFrameInfo(hAACDecoder, frameInfo);
NumChannels = frameInfo->nChans;
SampleRate = frameInfo->sampRateCore;
}else{
struct BITSTREAM *pBitstream ;
pBitstream = (struct BITSTREAM *)malloc(sizeof(struct BITSTREAM)) ;
if (!pBitstream)
return 0 ;
pBitstream->cacheBitsLeft = 0 ;
pBitstream->buffer = sh->codecdata ;
pBitstream->nBits = sh->codecdata_len*8 ;
pBitstream->pkptr = pBitstream->buffer + (0>>3) ;
pBitstream->cacheBitsLeft = 0 ;
pBitstream->cache = 0 ;
pBitstream->inc = 1 ;
result = ga_config_get_data(pBitstream, &configData);
if(pBitstream){
free(pBitstream);
}
if (result != HXR_OK) /* config data error */
{
return 0;
}
NumChannels = frameInfo->nChans=configData.numChannels;
SampleRate = frameInfo->sampRateCore=configData.samplingFrequency;
/* see MPEG4 spec for index of each object type */
if (configData.audioObjectType == 2)
frameInfo->profile = AAC_PROFILE_LC;
else if (configData.audioObjectType == 1)
frameInfo->profile = AAC_PROFILE_MP;
else if (configData.audioObjectType == 3)
frameInfo->profile = AAC_PROFILE_SSR;
else
return 0; /* don't know - assume LC */
/* set decoder to handle raw data blocks */
AACSetRawBlockParams(hAACDecoder, 0, frameInfo);
}
mp_msg(MSGT_DECAUDIO,MSGL_V,"realaac: Decoder init done (%dBytes)!\n", sh->a_in_buffer_len); // XXX: remove or move to debug!
mp_msg(MSGT_DECAUDIO,MSGL_V,"realaac: Negotiated samplerate: %ldHz channels: %d\n", SampleRate, NumChannels);
sh->channels = NumChannels;
if (audio_output_channels <= 2) sh->channels = NumChannels > 1 ? 2 : 1;
sh->samplerate = SampleRate;
sh->samplesize=2;
if(!sh->i_bps) {
mp_msg(MSGT_DECAUDIO,MSGL_WARN,"realaac: compressed input bitrate missing, assuming 128kbit/s!\n");
sh->i_bps = 128*1000/8; // XXX: HACK!!! ::atmos
} else
mp_msg(MSGT_DECAUDIO,MSGL_V,"realaac: got %dkbit/s bitrate from MP4 header!\n",sh->i_bps*8/1000);
return 1; // return values: 1=OK 0=ERROR
}
/*
* aac_decode_init
*/
HX_RESULT
aac_decode_init(void* pInitParams,
UINT32 ulInitParamsSize,
ra_format_info* pStreamInfo,
void** pDecode,
void* pUserMem,
rm_malloc_func_ptr fpMalloc,
rm_free_func_ptr fpFree)
{
HX_RESULT result = HXR_OK;
aac_decode* pDec;
AACFrameInfo *frameInfo;
ga_config_data configData;
UCHAR *pData;
UCHAR *inBuf;
INT16 *temp;
UINT32 numBytes, numBits;
UINT32 cfgType;
/* for MP4 bitstream parsing */
struct BITSTREAM *pBs = 0;
/* allocate the aac_decode struct */
pDec = (aac_decode*) fpMalloc(pUserMem, sizeof(aac_decode));
if (pDec == HXNULL)
{
return HXR_OUTOFMEMORY;
}
memset(pDec, 0, sizeof(aac_decode));
*pDecode = (void *)pDec;
/* allocate the frame info struct */
pDec->pFrameInfo = fpMalloc(pUserMem, sizeof(AACFrameInfo));
frameInfo = (AACFrameInfo *) pDec->pFrameInfo;
/* allocate the decoder backend instance */
pDec->pDecoder = AACInitDecoder(1);
if (pDec->pFrameInfo == HXNULL || pDec->pDecoder == HXNULL)
{
return HXR_OUTOFMEMORY;
}
/* save the stream info and init data we'll need later */
pDec->ulNumChannels = (UINT32)pStreamInfo->usNumChannels;
pDec->ulBlockSize = pStreamInfo->ulGranularity;
pDec->ulFrameSize = pStreamInfo->ulBitsPerFrame;
pDec->ulFramesPerBlock = pDec->ulBlockSize / pDec->ulFrameSize;
/* output frame size is doubled for safety in case of implicit SBR */
pDec->ulSamplesPerFrame = 1024*pStreamInfo->usNumChannels*2;
pDec->ulSampleRateCore = pStreamInfo->ulSampleRate;
pDec->ulSampleRateOut = pStreamInfo->ulActualRate;
if (pStreamInfo->ulOpaqueDataSize < 1)
{
return HXR_FAIL; /* insufficient config data */
}
/* get the config data */
pData = (UCHAR *)pStreamInfo->pOpaqueData;
cfgType = pData[0];
inBuf = pData + 1;
numBytes = pStreamInfo->ulOpaqueDataSize - 1;
if (cfgType == 1) /* ADTS Frame */
{
/* allocate temp buffer for decoding first ADTS frame */
temp = (INT16 *)fpMalloc(pUserMem, sizeof(INT16) * pDec->ulSamplesPerFrame);
if (temp == HXNULL)
{
return HXR_OUTOFMEMORY;
}
else
{
/* decode ADTS frame from opaque data to get config data */
result = AACDecode(pDec->pDecoder, &inBuf, (INT32*)&numBytes, temp);
/* free the temp buffer */
fpFree(pUserMem, temp);
}
if (result == HXR_OK)
{
/* get the config data struct from the decoder */
AACGetLastFrameInfo(pDec->pDecoder, frameInfo);
pDec->ulNumChannels = frameInfo->nChans;
pDec->ulSamplesPerFrame = frameInfo->outputSamps;
pDec->ulSampleRateCore = frameInfo->sampRateCore;
pDec->ulSampleRateOut = frameInfo->sampRateOut;
pDec->bSBR = (pDec->ulSampleRateCore != pDec->ulSampleRateOut);
}
}
else if (cfgType == 2) /* MP4 Audio Specific Config Data */
{
numBits = numBytes*8;
if (newBitstream(&pBs, numBits, pUserMem, fpMalloc))
{
return HXR_FAIL;
}
feedBitstream(pBs, (const UCHAR *)inBuf, numBits);
setAtBitstream(pBs, 0, 1);
result = ga_config_get_data(pBs, &configData);
deleteBitstream(pBs, pUserMem, fpFree);
if (result != HXR_OK) /* config data error */
{
return HXR_FAIL;
}
pDec->ulNumChannels = configData.numChannels;
pDec->ulSampleRateCore = configData.samplingFrequency;
pDec->ulSampleRateOut = configData.extensionSamplingFrequency;
pDec->bSBR = configData.bSBR;
/* ulSamplesPerFrame is set to the maximum possible output length.
* The config data has the initial output length, which might
* be doubled once the first frame is handed in (if AAC+ is
* signalled implicitly).
*/
pDec->ulSamplesPerFrame = 2*configData.frameLength*configData.numChannels;
/* setup decoder to handle raw data blocks */
frameInfo->nChans = pDec->ulNumChannels;
frameInfo->sampRateCore = pDec->ulSampleRateCore;
/* see MPEG4 spec for index of each object type */
if (configData.audioObjectType == 2)
frameInfo->profile = AAC_PROFILE_LC;
else if (configData.audioObjectType == 1)
frameInfo->profile = AAC_PROFILE_MP;
else if (configData.audioObjectType == 3)
frameInfo->profile = AAC_PROFILE_SSR;
else
frameInfo->profile = AAC_PROFILE_LC; /* don't know - assume LC */
frameInfo->audio_send_by_frame=0;
}
else /* unsupported config type */
{
return HXR_FAIL;
}
/* make certain that all the channels can be handled */
if (pDec->ulNumChannels > AAC_MAX_NCHANS) {
return HXR_UNSUPPORTED_AUDIO;
}
/* set the channel mask - custom maps not supported */
switch (pDec->ulNumChannels) {
case 1: pDec->ulChannelMask = 0x00004; /* FC */
case 2: pDec->ulChannelMask = 0x00003; /* FL,FR */
case 3: pDec->ulChannelMask = 0x00007; /* FL,FR,FC */
case 4: pDec->ulChannelMask = 0x00107; /* FL,FR,FC,BC */
case 5: pDec->ulChannelMask = 0x00037; /* FL,FR,FC,BL,BR */
case 6: pDec->ulChannelMask = 0x0003F; /* FL,FR,FC,LF,BL,BR */
default: pDec->ulChannelMask = 0xFFFFF; /* Unknown */
}
/* set the delay samples */
pDec->ulDelayRemaining = pDec->ulSamplesPerFrame;
/* set decoder to handle raw data blocks */
AACSetRawBlockParams(pDec->pDecoder, 0, frameInfo);
return HXR_OK;
}
