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Merge "Validate whether all PCE listed element instance tags are present in raw_data_block." into sc-dev

This commit is contained in:
TreeHugger Robot 2021-05-06 20:52:44 +00:00 committed by Android (Google) Code Review
parent f633fc085e 9a9d260375
commit 8d746cfdb4
1 changed files with 87 additions and 0 deletions
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87
libAACdec/src/aacdecoder.cpp
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@ -494,6 +494,75 @@ static AAC_DECODER_ERROR CDataStreamElement_Read(HANDLE_AACDECODER self,
return error;
}
static INT findElementInstanceTag(
INT elementTag, MP4_ELEMENT_ID elementId,
CAacDecoderChannelInfo **pAacDecoderChannelInfo, INT nChannels,
MP4_ELEMENT_ID *pElementIdTab, INT nElements) {
int el, chCnt = 0;
for (el = 0; el < nElements; el++) {
switch (pElementIdTab[el]) {
case ID_CPE:
case ID_SCE:
case ID_LFE:
if ((elementTag == pAacDecoderChannelInfo[chCnt]->ElementInstanceTag) &&
(elementId == pElementIdTab[el])) {
return 1; /* element instance tag found */
}
chCnt += (pElementIdTab[el] == ID_CPE) ? 2 : 1;
break;
default:
break;
}
if (chCnt >= nChannels) break;
if (pElementIdTab[el] == ID_END) break;
}
return 0; /* element instance tag not found */
}
static INT validateElementInstanceTags(
CProgramConfig *pce, CAacDecoderChannelInfo **pAacDecoderChannelInfo,
INT nChannels, MP4_ELEMENT_ID *pElementIdTab, INT nElements) {
if (nChannels >= pce->NumChannels) {
for (int el = 0; el < pce->NumFrontChannelElements; el++) {
if (!findElementInstanceTag(pce->FrontElementTagSelect[el],
pce->FrontElementIsCpe[el] ? ID_CPE : ID_SCE,
pAacDecoderChannelInfo, nChannels,
pElementIdTab, nElements)) {
return 0; /* element instance tag not in raw_data_block() */
}
}
for (int el = 0; el < pce->NumSideChannelElements; el++) {
if (!findElementInstanceTag(pce->SideElementTagSelect[el],
pce->SideElementIsCpe[el] ? ID_CPE : ID_SCE,
pAacDecoderChannelInfo, nChannels,
pElementIdTab, nElements)) {
return 0; /* element instance tag not in raw_data_block() */
}
}
for (int el = 0; el < pce->NumBackChannelElements; el++) {
if (!findElementInstanceTag(pce->BackElementTagSelect[el],
pce->BackElementIsCpe[el] ? ID_CPE : ID_SCE,
pAacDecoderChannelInfo, nChannels,
pElementIdTab, nElements)) {
return 0; /* element instance tag not in raw_data_block() */
}
}
for (int el = 0; el < pce->NumLfeChannelElements; el++) {
if (!findElementInstanceTag(pce->LfeElementTagSelect[el], ID_LFE,
pAacDecoderChannelInfo, nChannels,
pElementIdTab, nElements)) {
return 0; /* element instance tag not in raw_data_block() */
}
}
} else {
return 0; /* too less decoded audio channels */
}
return 1; /* all element instance tags found in raw_data_block() */
}
/*!
\brief Read Program Config Element
@ -2973,6 +3042,24 @@ LINKSPEC_CPP AAC_DECODER_ERROR CAacDecoder_DecodeFrame(
} /* while ( (type != ID_END) ... ) */
if (!(self->flags[streamIndex] &
(AC_USAC | AC_RSVD50 | AC_RSV603DA | AC_BSAC | AC_LD | AC_ELD | AC_ER |
AC_SCALABLE)) &&
(self->streamInfo.channelConfig == 0) && pce->isValid &&
(ErrorStatus == AAC_DEC_OK) && self->frameOK &&
!(flags & (AACDEC_CONCEAL | AACDEC_FLUSH))) {
/* Check whether all PCE listed element instance tags are present in
* raw_data_block() */
if (!validateElementInstanceTags(
&self->pce, self->pAacDecoderChannelInfo, aacChannels,
channel_elements,
fMin(channel_element_count, (int)(sizeof(channel_elements) /
sizeof(*channel_elements))))) {
ErrorStatus = AAC_DEC_DECODE_FRAME_ERROR;
self->frameOK = 0;
}
}
if (!(flags & (AACDEC_CONCEAL | AACDEC_FLUSH))) {
/* float decoder checks if bitsLeft is in range 0-7; only prerollAUs are
* byteAligned with respect to the first bit */