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-rw-r--r--libAACdec/include/aacdecoder_lib.h26
-rw-r--r--libAACdec/src/aacdecoder.cpp37
-rw-r--r--libAACdec/src/aacdecoder.h5
-rw-r--r--libAACdec/src/aacdecoder_lib.cpp14
4 files changed, 61 insertions, 21 deletions
diff --git a/libAACdec/include/aacdecoder_lib.h b/libAACdec/include/aacdecoder_lib.h
index a281ab9..bf6dcfb 100644
--- a/libAACdec/include/aacdecoder_lib.h
+++ b/libAACdec/include/aacdecoder_lib.h
@@ -532,18 +532,18 @@ typedef enum
*/
typedef struct
{
- /* These three members are the only really relevant ones for the user. */
+ /* These five members are the only really relevant ones for the user. */
INT sampleRate; /*!< The samplerate in Hz of the fully decoded PCM audio signal (after SBR processing). */
INT frameSize; /*!< The frame size of the decoded PCM audio signal. \n
1024 or 960 for AAC-LC \n
2048 or 1920 for HE-AAC (v2) \n
512 or 480 for AAC-LD and AAC-ELD */
INT numChannels; /*!< The number of output audio channels in the decoded and interleaved PCM audio signal. */
- AUDIO_CHANNEL_TYPE *pChannelType; /*!< Audio channel type of each output audio channel. */
- UCHAR *pChannelIndices; /*!< Audio channel index for each output audio channel.
+ AUDIO_CHANNEL_TYPE *pChannelType; /*!< Audio channel type of each output audio channel. */
+ UCHAR *pChannelIndices; /*!< Audio channel index for each output audio channel.
See ISO/IEC 13818-7:2005(E), 8.5.3.2 Explicit channel mapping using a program_config_element() */
/* Decoder internal members. */
- INT aacSampleRate; /*!< sampling rate in Hz without SBR (from configuration info). */
+ INT aacSampleRate; /*!< Sampling rate in Hz without SBR (from configuration info). */
INT profile; /*!< MPEG-2 profile (from file header) (-1: not applicable (e. g. MPEG-4)). */
AUDIO_OBJECT_TYPE aot; /*!< Audio Object Type (from ASC): is set to the appropriate value for MPEG-2 bitstreams (e. g. 2 for AAC-LC). */
INT channelConfig; /*!< Channel configuration (0: PCE defined, 1: mono, 2: stereo, ... */
@@ -556,7 +556,9 @@ typedef struct
AUDIO_OBJECT_TYPE extAot; /*!< Extension Audio Object Type (from ASC) */
INT extSamplingRate; /*!< Extension sampling rate in Hz (from ASC) */
- UINT flags; /*!< Copy if internal flags. Only to be written by the decoder, and only to be read externally. */
+ UINT outputDelay; /*!< The number of samples the output is additionally delayed by the decoder. */
+
+ UINT flags; /*!< Copy of internal flags. Only to be written by the decoder, and only to be read externally. */
SCHAR epConfig; /*!< epConfig level (from ASC): only level 0 supported, -1 means no ER (e. g. AOT=2, MPEG-2 AAC, etc.) */
@@ -681,11 +683,15 @@ aacDecoder_Fill ( HANDLE_AACDECODER self,
const UINT bufferSize[],
UINT *bytesValid );
-#define AACDEC_CONCEAL 1 /*!< Flag for aacDecoder_DecodeFrame(): do not consider new input data. Do concealment. */
-#define AACDEC_FLUSH 2 /*!< Flag for aacDecoder_DecodeFrame(): Do not consider new input data. Flush filterbanks (output delayed audio). */
-#define AACDEC_INTR 4 /*!< Flag for aacDecoder_DecodeFrame(): Signal an input bit stream data discontinuity. Resync any internals as necessary. */
-#define AACDEC_CLRHIST 8 /*!< Flag for aacDecoder_DecodeFrame(): Clear all signal delay lines and history buffers.
- Caution: This can cause discontinuities in the output signal. */
+#define AACDEC_CONCEAL 1 /*!< Flag for aacDecoder_DecodeFrame(): Trigger the built-in error concealment module \
+ to generate a substitute signal for one lost frame. New input data will not be
+ considered. */
+#define AACDEC_FLUSH 2 /*!< Flag for aacDecoder_DecodeFrame(): Flush all filterbanks to get all delayed audio \
+ without having new input data. Thus new input data will not be considered.*/
+#define AACDEC_INTR 4 /*!< Flag for aacDecoder_DecodeFrame(): Signal an input bit stream data discontinuity. \
+ Resync any internals as necessary. */
+#define AACDEC_CLRHIST 8 /*!< Flag for aacDecoder_DecodeFrame(): Clear all signal delay lines and history buffers.\
+ CAUTION: This can cause discontinuities in the output signal. */
/**
* \brief Decode one audio frame
diff --git a/libAACdec/src/aacdecoder.cpp b/libAACdec/src/aacdecoder.cpp
index 18c9afa..15b47ab 100644
--- a/libAACdec/src/aacdecoder.cpp
+++ b/libAACdec/src/aacdecoder.cpp
@@ -717,6 +717,8 @@ void CStreamInfoInit(CStreamInfo *pStreamInfo)
pStreamInfo->numChannels = 0;
pStreamInfo->sampleRate = 0;
pStreamInfo->frameSize = 0;
+
+ pStreamInfo->outputDelay = 0;
}
/*!
@@ -1184,11 +1186,8 @@ LINKSPEC_CPP AAC_DECODER_ERROR CAacDecoder_DecodeFrame(
CConcealment_InitChannelData(&self->pAacDecoderStaticChannelInfo[ch]->concealmentInfo,
&self->concealCommonData,
self->streamInfo.aacSamplesPerFrame );
- /* Clear concealment buffers to get rid of the complete history */
- FDKmemclear(self->pAacDecoderStaticChannelInfo[ch]->concealmentInfo.spectralCoefficient, 1024 * sizeof(FIXP_CNCL));
- FDKmemclear(self->pAacDecoderStaticChannelInfo[ch]->concealmentInfo.specScale, 8 * sizeof(SHORT));
/* Clear overlap-add buffers to avoid clicks. */
- FDKmemclear(self->pAacDecoderStaticChannelInfo[ch]->IMdct.overlap.freq, OverlapBufferSize*sizeof(FIXP_DBL));
+ FDKmemclear(self->pAacDecoderStaticChannelInfo[ch]->pOverlapBuffer, OverlapBufferSize*sizeof(FIXP_DBL));
}
}
@@ -1508,10 +1507,19 @@ LINKSPEC_CPP AAC_DECODER_ERROR CAacDecoder_DecodeFrame(
break;
}
}
- if (err == SBRDEC_OK) {
+ switch (err) {
+ case SBRDEC_PARSE_ERROR:
+ /* Can not go on parsing because we do not
+ know the length of the SBR extension data. */
+ FDKpushFor(bs, bitCnt);
+ bitCnt = 0;
+ break;
+ case SBRDEC_OK:
self->sbrEnabled = 1;
- } else {
+ break;
+ default:
self->frameOK = 0;
+ break;
}
}
@@ -1601,13 +1609,17 @@ LINKSPEC_CPP AAC_DECODER_ERROR CAacDecoder_DecodeFrame(
self->frameOK=0;
}
- /* store or restore the number of channels */
+ /* store or restore the number of channels and the corresponding info */
if ( self->frameOK && !(flags &(AACDEC_CONCEAL|AACDEC_FLUSH)) ) {
- self->concealChannels = aacChannels; /* store */
+ self->aacChannelsPrev = aacChannels; /* store */
+ FDKmemcpy(self->channelTypePrev, self->channelType, (8)*sizeof(AUDIO_CHANNEL_TYPE)); /* store */
+ FDKmemcpy(self->channelIndicesPrev, self->channelIndices, (8)*sizeof(UCHAR)); /* store */
self->sbrEnabledPrev = self->sbrEnabled;
} else {
if (self->aacChannels > 0) {
- aacChannels = self->concealChannels; /* restore */
+ aacChannels = self->aacChannelsPrev; /* restore */
+ FDKmemcpy(self->channelType, self->channelTypePrev, (8)*sizeof(AUDIO_CHANNEL_TYPE)); /* restore */
+ FDKmemcpy(self->channelIndices, self->channelIndicesPrev, (8)*sizeof(UCHAR)); /* restore */
self->sbrEnabled = self->sbrEnabledPrev;
}
}
@@ -1687,6 +1699,11 @@ LINKSPEC_CPP AAC_DECODER_ERROR CAacDecoder_DecodeFrame(
}
+ if ( flags&AACDEC_FLUSH ) {
+ /* Clear pAacDecoderChannelInfo->pSpectralCoefficient because with AACDEC_FLUSH set it contains undefined data. */
+ FDKmemclear(pAacDecoderChannelInfo->pSpectralCoefficient, sizeof(FIXP_DBL)*self->streamInfo.aacSamplesPerFrame);
+ }
+
/*
Conceal defective spectral data
*/
@@ -1765,6 +1782,8 @@ LINKSPEC_CPP AAC_DECODER_ERROR CAacDecoder_DecodeFrame(
);
}
+ /* Add additional concealment delay */
+ self->streamInfo.outputDelay += CConcealment_GetDelay(&self->concealCommonData) * self->streamInfo.aacSamplesPerFrame;
/* Reorder channel type information tables. */
{
diff --git a/libAACdec/src/aacdecoder.h b/libAACdec/src/aacdecoder.h
index bcbc040..3541773 100644
--- a/libAACdec/src/aacdecoder.h
+++ b/libAACdec/src/aacdecoder.h
@@ -198,7 +198,10 @@ struct AAC_DECODER_INSTANCE {
CAacDecoderCommonData aacCommonData; /*!< Temporal shared data for all channels hooked into pAacDecoderChannelInfo */
CConcealParams concealCommonData;
- INT concealChannels;
+
+ INT aacChannelsPrev; /*!< The amount of AAC core channels of the last successful decode call. */
+ AUDIO_CHANNEL_TYPE channelTypePrev[(8)]; /*!< Array holding the channelType values of the last successful decode call. */
+ UCHAR channelIndicesPrev[(8)]; /*!< Array holding the channelIndices values of the last successful decode call. */
HANDLE_SBRDECODER hSbrDecoder; /*!< SBR decoder handle. */
diff --git a/libAACdec/src/aacdecoder_lib.cpp b/libAACdec/src/aacdecoder_lib.cpp
index 98ef0de..e2c757a 100644
--- a/libAACdec/src/aacdecoder_lib.cpp
+++ b/libAACdec/src/aacdecoder_lib.cpp
@@ -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);
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 18:13:34 +0000