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AAC Decoder: flush/seek improvements

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Improve flushing and seeking.
Add field to the API stream info structure signaling the additional output
 delay for flushing and delay compensation.

Bug 9428126

Change-Id: I808412905563ea3de50a2e77a9b5dfee829cd2ed
This commit is contained in:
Jean-Michel Trivi
2014-05-20 17:24:06 -07:00
parent fb2e845179
commit af967fcc55
7 changed files with 108 additions and 26 deletions
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14
libAACdec/src/aacdecoder_lib.cpp
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@ -110,7 +110,7 @@ amm-info@iis.fraunhofer.de
/* Decoder library info */
#define AACDECODER_LIB_VL0 2
#define AACDECODER_LIB_VL1 5
#define AACDECODER_LIB_VL2 7
#define AACDECODER_LIB_VL2 8
#define AACDECODER_LIB_TITLE "AAC Decoder Lib"
#define AACDECODER_LIB_BUILD_DATE __DATE__
#define AACDECODER_LIB_BUILD_TIME __TIME__
@ -842,6 +842,7 @@ LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_DecodeFrame(
/* Signal bit stream interruption to other modules if required. */
if ( fTpInterruption || (flags & (AACDEC_INTR|AACDEC_CLRHIST)) )
{
sbrDecoder_SetParam(self->hSbrDecoder, SBR_CLEAR_HISTORY, (flags&AACDEC_CLRHIST));
aacDecoder_SignalInterruption(self);
if ( ! (flags & AACDEC_INTR) ) {
ErrorStatus = AAC_DEC_TRANSPORT_SYNC_ERROR;
@ -857,6 +858,8 @@ LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_DecodeFrame(
self->streamInfo.numBadBytes = 0;
self->streamInfo.numTotalBytes = 0;
}
/* Reset the output delay field. The modules will add their figures one after another. */
self->streamInfo.outputDelay = 0;
if (self->limiterEnableUser==(UCHAR)-1) {
/* Enbale limiter for all non-lowdelay AOT's. */
@ -916,6 +919,9 @@ LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_DecodeFrame(
sbrDecoder_SetParam ( self->hSbrDecoder,
SBR_SYSTEM_BITSTREAM_DELAY,
self->sbrParams.bsDelay);
sbrDecoder_SetParam ( self->hSbrDecoder,
SBR_FLUSH_DATA,
(flags & AACDEC_FLUSH) );
if ( self->streamInfo.aot == AOT_ER_AAC_ELD ) {
/* Configure QMF */
@ -958,6 +964,9 @@ LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_DecodeFrame(
self->streamInfo.frameSize = self->streamInfo.aacSamplesPerFrame << 1;
}
}
/* Correct the additional concealment delay figures */
self->streamInfo.outputDelay -= self->sbrParams.bsDelay * self->streamInfo.aacSamplesPerFrame;
self->streamInfo.outputDelay += self->sbrParams.bsDelay * self->streamInfo.frameSize;
if (self->psPossible) {
self->flags |= AC_PS_PRESENT;
@ -1014,6 +1023,9 @@ LINKSPEC_CPP AAC_DECODER_ERROR aacDecoder_DecodeFrame(
self->extGainDelay,
self->streamInfo.frameSize
);
/* Announce the additional limiter output delay */
self->streamInfo.outputDelay += getLimiterDelay(self->hLimiter);
}
}