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-rw-r--r--libMpegTPDec/src/tpdec_asc.cpp101
-rw-r--r--libMpegTPDec/src/tpdec_latm.cpp3
-rw-r--r--libMpegTPDec/src/tpdec_lib.cpp28
3 files changed, 30 insertions, 102 deletions
diff --git a/libMpegTPDec/src/tpdec_asc.cpp b/libMpegTPDec/src/tpdec_asc.cpp
index ee7c7cf..3553398 100644
--- a/libMpegTPDec/src/tpdec_asc.cpp
+++ b/libMpegTPDec/src/tpdec_asc.cpp
@@ -382,11 +382,19 @@ int CProgramConfig_LookupElement(
#ifdef TP_PCE_ENABLE
int CProgramConfig_GetElementTable(
const CProgramConfig *pPce,
- MP4_ELEMENT_ID elList[]
+ MP4_ELEMENT_ID elList[],
+ const INT elListSize
)
{
int i, el = 0;
+ if ( elListSize
+ < pPce->NumFrontChannelElements + pPce->NumSideChannelElements + pPce->NumBackChannelElements + pPce->NumLfeChannelElements
+ )
+ {
+ return 0;
+ }
+
for (i=0; i < pPce->NumFrontChannelElements; i++)
{
elList[el++] = (pPce->FrontElementIsCpe[i]) ? ID_CPE : ID_SCE;
@@ -619,94 +627,6 @@ bail:
#endif /* TP_ELD_ENABLE */
-static
-TRANSPORTDEC_ERROR AudioSpecificConfig_ExtensionParse(CSAudioSpecificConfig *self, HANDLE_FDK_BITSTREAM bs, CSTpCallBacks *cb)
-{
- TP_ASC_EXTENSION_ID lastAscExt, ascExtId = ASCEXT_UNKOWN;
- INT bitsAvailable = (INT)FDKgetValidBits(bs);
-
- while (bitsAvailable >= 11)
- {
- lastAscExt = ascExtId;
- ascExtId = (TP_ASC_EXTENSION_ID)FDKreadBits(bs, 11);
- bitsAvailable -= 11;
-
- switch (ascExtId) {
- case ASCEXT_SBR: /* 0x2b7 */
- if ( (self->m_extensionAudioObjectType != AOT_SBR) && (bitsAvailable >= 5) ) {
- self->m_extensionAudioObjectType = getAOT(bs);
-
- if ( (self->m_extensionAudioObjectType == AOT_SBR)
- || (self->m_extensionAudioObjectType == AOT_ER_BSAC) )
- { /* Get SBR extension configuration */
- self->m_sbrPresentFlag = FDKreadBits(bs, 1);
- bitsAvailable -= 1;
-
- if ( self->m_sbrPresentFlag == 1 ) {
- self->m_extensionSamplingFrequency = getSampleRate(bs, &self->m_extensionSamplingFrequencyIndex, 4);
-
- if ((INT)self->m_extensionSamplingFrequency <= 0) {
- return TRANSPORTDEC_PARSE_ERROR;
- }
- }
- if ( self->m_extensionAudioObjectType == AOT_ER_BSAC ) {
- self->m_extensionChannelConfiguration = FDKreadBits(bs, 4);
- bitsAvailable -= 4;
- }
- }
- /* Update counter because of variable length fields (AOT and sampling rate) */
- bitsAvailable = (INT)FDKgetValidBits(bs);
- }
- break;
- case ASCEXT_PS: /* 0x548 */
- if ( (lastAscExt == ASCEXT_SBR)
- && (self->m_extensionAudioObjectType == AOT_SBR)
- && (bitsAvailable > 0) )
- { /* Get PS extension configuration */
- self->m_psPresentFlag = FDKreadBits(bs, 1);
- bitsAvailable -= 1;
- }
- break;
- case ASCEXT_MPS: /* 0x76a */
- if ( self->m_extensionAudioObjectType == AOT_MPEGS )
- break;
- case ASCEXT_LDMPS: /* 0x7cc */
- if ( (ascExtId == ASCEXT_LDMPS)
- && (self->m_extensionAudioObjectType == AOT_LD_MPEGS) )
- break;
- if (bitsAvailable >= 1)
- {
- bitsAvailable -= 1;
- if ( FDKreadBits(bs, 1) ) { /* self->m_mpsPresentFlag */
- int sscLen = FDKreadBits(bs, 8);
- bitsAvailable -= 8;
- if (sscLen == 0xFF) {
- sscLen += FDKreadBits(bs, 16);
- bitsAvailable -= 16;
- }
- if (cb->cbSsc != NULL) {
- cb->cbSsc(
- cb->cbSscData,
- bs,
- self->m_aot,
- self->m_samplingFrequency,
- 1,
- sscLen
- );
- } else
- FDKpushFor(bs, sscLen); /* Skip SSC to be able to read the next extension if there is one. */
-
- bitsAvailable -= sscLen*8;
- }
- }
- break;
- default:
- return TRANSPORTDEC_UNSUPPORTED_FORMAT;
- }
- }
-
- return TRANSPORTDEC_OK;
-}
/*
* API Functions
@@ -857,9 +777,6 @@ TRANSPORTDEC_ERROR AudioSpecificConfig_Parse(
break;
}
- if (fExplicitBackwardCompatible) {
- ErrorStatus = AudioSpecificConfig_ExtensionParse(self, bs, cb);
- }
return (ErrorStatus);
}
diff --git a/libMpegTPDec/src/tpdec_latm.cpp b/libMpegTPDec/src/tpdec_latm.cpp
index 28daebc..71e35a7 100644
--- a/libMpegTPDec/src/tpdec_latm.cpp
+++ b/libMpegTPDec/src/tpdec_latm.cpp
@@ -315,9 +315,6 @@ TRANSPORTDEC_ERROR CLatmDemux_ReadPayloadLengthInfo(HANDLE_FDK_BITSTREAM bs, CLa
else {
ErrorStatus = TRANSPORTDEC_PARSE_ERROR; //AAC_DEC_LATM_TIMEFRAMING;
}
- if ((INT)FDKgetValidBits(bs) < totalPayloadBits) {
- return TRANSPORTDEC_NOT_ENOUGH_BITS;
- }
if (pLatmDemux->m_audioMuxLengthBytes > 0 && totalPayloadBits > pLatmDemux->m_audioMuxLengthBytes*8) {
return TRANSPORTDEC_PARSE_ERROR;
}
diff --git a/libMpegTPDec/src/tpdec_lib.cpp b/libMpegTPDec/src/tpdec_lib.cpp
index 4387847..e179678 100644
--- a/libMpegTPDec/src/tpdec_lib.cpp
+++ b/libMpegTPDec/src/tpdec_lib.cpp
@@ -85,6 +85,7 @@ struct TRANSPORTDEC
#define TPDEC_IGNORE_BUFFERFULLNESS 4
#define TPDEC_EARLY_CONFIG 8
#define TPDEC_LOST_FRAMES_PENDING 16
+#define TPDEC_CONFIG_FOUND 32
C_ALLOC_MEM(Ram_TransportDecoder, TRANSPORTDEC, 1)
C_ALLOC_MEM(Ram_TransportDecoderBuffer, UCHAR, TRANSPORTDEC_INBUF_SIZE)
@@ -177,11 +178,10 @@ TRANSPORTDEC_ERROR transportDec_OutOfBandConfig(HANDLE_TRANSPORTDEC hTp, UCHAR *
}
}
break;
+ default:
case TT_MP4_RAW:
err = AudioSpecificConfig_Parse(&hTp->asc[layer], hBs, 1, &hTp->callbacks);
break;
- default:
- return TRANSPORTDEC_UNSUPPORTED_FORMAT;
}
if (err == TRANSPORTDEC_OK) {
int errC;
@@ -192,6 +192,10 @@ TRANSPORTDEC_ERROR transportDec_OutOfBandConfig(HANDLE_TRANSPORTDEC hTp, UCHAR *
}
}
+ if (err == TRANSPORTDEC_OK) {
+ hTp->flags |= TPDEC_CONFIG_FOUND;
+ }
+
return err;
}
@@ -439,6 +443,14 @@ TRANSPORTDEC_ERROR synchronization(
totalBits = (INT)FDKgetValidBits(hBs);
+ if (totalBits <= 0) {
+ /* Return sync error, because this happens only in case of severly damaged bit streams.
+ Returning TRANSPORTDEC_NOT_ENOUGH_BITS here is very dangerous. */
+ /* numberOfRawDataBlocks must be always reset in case of sync errors. */
+ hTp->numberOfRawDataBlocks = 0;
+ goto bail;
+ }
+
fTraverseMoreFrames = (hTp->flags & (TPDEC_MINIMIZE_DELAY|TPDEC_EARLY_CONFIG)) && ! (hTp->flags & TPDEC_SYNCOK);
/* Set transport specific sync parameters */
@@ -625,13 +637,15 @@ TRANSPORTDEC_ERROR synchronization(
if (err == TRANSPORTDEC_SYNC_ERROR) {
int bits;
- FDK_ASSERT(hTp->numberOfRawDataBlocks == 0);
+ /* Enforce re-sync of transport headers. */
+ hTp->numberOfRawDataBlocks = 0;
+
/* Ensure that the bit amount lands and a multiple of TPDEC_SYNCSKIP */
bits = (bitsAvail + headerBits) % TPDEC_SYNCSKIP;
/* Rewind - TPDEC_SYNCSKIP, in order to look for a synch one bit ahead next time. */
FDKpushBiDirectional(hBs, -(headerBits - TPDEC_SYNCSKIP) + bits);
bitsAvail += headerBits - TPDEC_SYNCSKIP - bits;
- headerBits = 0;
+ headerBits = 0;
}
/* Frame traversal */
@@ -710,6 +724,7 @@ TRANSPORTDEC_ERROR synchronization(
err = TRANSPORTDEC_OK;
}
+bail:
hTp->auLength[0] = rawDataBlockLength;
if (err == TRANSPORTDEC_OK) {
@@ -852,7 +867,7 @@ TRANSPORTDEC_ERROR transportDec_ReadAccessUnit( const HANDLE_TRANSPORTDEC hTp, c
case TT_MP4_ADIF:
/* Read header if not already done */
- if (!(hTp->flags & TPDEC_SYNCOK))
+ if (!(hTp->flags & TPDEC_CONFIG_FOUND))
{
CProgramConfig *pce;
@@ -876,8 +891,7 @@ TRANSPORTDEC_ERROR transportDec_ReadAccessUnit( const HANDLE_TRANSPORTDEC hTp, c
errC = hTp->callbacks.cbUpdateConfig(hTp->callbacks.cbUpdateConfigData, &hTp->asc[0]);
if (errC == 0) {
- /* Misuse sync flag to parse header only once. */
- hTp->flags |= TPDEC_SYNCOK;
+ hTp->flags |= TPDEC_CONFIG_FOUND;
} else {
err = TRANSPORTDEC_PARSE_ERROR;
goto bail;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-11 18:22:36 +0000