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avcodec/dca_exss: prepare to be called from parser context 

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
foo86 2016-05-23 17:58:41 +03:00 committed by James Almer
parent 24fcb23351
commit 72a9a7e9cb
2 changed files with 21 additions and 12 deletions
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31
libavcodec/dca_exss.c
View File

@ -128,7 +128,8 @@ static int parse_descriptor(DCAExssParser *s, DCAExssAsset *asset)
// Number of speaker remapping sets
if ((spkr_remap_nsets = get_bits(&s->gb, 3)) && !spkr_mask_nbits) {
av_log(s->avctx, AV_LOG_ERROR, "Speaker mask disabled yet there are remapping sets\n");
if (s->avctx)
av_log(s->avctx, AV_LOG_ERROR, "Speaker mask disabled yet there are remapping sets\n");
return AVERROR_INVALIDDATA;
}
@ -213,7 +214,8 @@ static int parse_descriptor(DCAExssParser *s, DCAExssAsset *asset)
for (i = 0; i < s->nmixoutconfigs; i++) {
if (!s->nmixoutchs[i]) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid speaker layout mask for mixing configuration\n");
if (s->avctx)
av_log(s->avctx, AV_LOG_ERROR, "Invalid speaker layout mask for mixing configuration\n");
return AVERROR_INVALIDDATA;
}
for (j = 0; j < nchannels_dmix; j++) {
@ -310,7 +312,8 @@ static int parse_descriptor(DCAExssParser *s, DCAExssAsset *asset)
// Reserved
// Zero pad
if (ff_dca_seek_bits(&s->gb, descr_pos + descr_size * 8)) {
av_log(s->avctx, AV_LOG_ERROR, "Read past end of EXSS asset descriptor\n");
if (s->avctx)
av_log(s->avctx, AV_LOG_ERROR, "Read past end of EXSS asset descriptor\n");
return AVERROR_INVALIDDATA;
}
@ -373,7 +376,7 @@ static int set_exss_offsets(DCAExssAsset *asset)
return 0;
}
int ff_dca_exss_parse(DCAExssParser *s, uint8_t *data, int size)
int ff_dca_exss_parse(DCAExssParser *s, const uint8_t *data, int size)
{
int i, ret, offset, wide_hdr, header_size;
@ -396,7 +399,7 @@ int ff_dca_exss_parse(DCAExssParser *s, uint8_t *data, int size)
header_size = get_bits(&s->gb, 8 + 4 * wide_hdr) + 1;
// Check CRC
if (ff_dca_check_crc(s->avctx, &s->gb, 32 + 8, header_size * 8)) {
if (s->avctx && ff_dca_check_crc(s->avctx, &s->gb, 32 + 8, header_size * 8)) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid EXSS header checksum\n");
return AVERROR_INVALIDDATA;
}
@ -406,7 +409,8 @@ int ff_dca_exss_parse(DCAExssParser *s, uint8_t *data, int size)
// Number of bytes of extension substream
s->exss_size = get_bits(&s->gb, s->exss_size_nbits) + 1;
if (s->exss_size > size) {
av_log(s->avctx, AV_LOG_ERROR, "Packet too short for EXSS frame\n");
if (s->avctx)
av_log(s->avctx, AV_LOG_ERROR, "Packet too short for EXSS frame\n");
return AVERROR_INVALIDDATA;
}
@ -428,14 +432,16 @@ int ff_dca_exss_parse(DCAExssParser *s, uint8_t *data, int size)
// Number of defined audio presentations
s->npresents = get_bits(&s->gb, 3) + 1;
if (s->npresents > 1) {
avpriv_request_sample(s->avctx, "%d audio presentations", s->npresents);
if (s->avctx)
avpriv_request_sample(s->avctx, "%d audio presentations", s->npresents);
return AVERROR_PATCHWELCOME;
}
// Number of audio assets in extension substream
s->nassets = get_bits(&s->gb, 3) + 1;
if (s->nassets > 1) {
avpriv_request_sample(s->avctx, "%d audio assets", s->nassets);
if (s->avctx)
avpriv_request_sample(s->avctx, "%d audio assets", s->nassets);
return AVERROR_PATCHWELCOME;
}
@ -476,7 +482,8 @@ int ff_dca_exss_parse(DCAExssParser *s, uint8_t *data, int size)
s->assets[i].asset_size = get_bits(&s->gb, s->exss_size_nbits) + 1;
offset += s->assets[i].asset_size;
if (offset > s->exss_size) {
av_log(s->avctx, AV_LOG_ERROR, "EXSS asset out of bounds\n");
if (s->avctx)
av_log(s->avctx, AV_LOG_ERROR, "EXSS asset out of bounds\n");
return AVERROR_INVALIDDATA;
}
}
@ -486,7 +493,8 @@ int ff_dca_exss_parse(DCAExssParser *s, uint8_t *data, int size)
if ((ret = parse_descriptor(s, &s->assets[i])) < 0)
return ret;
if ((ret = set_exss_offsets(&s->assets[i])) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid extension size in EXSS asset descriptor\n");
if (s->avctx)
av_log(s->avctx, AV_LOG_ERROR, "Invalid extension size in EXSS asset descriptor\n");
return ret;
}
}
@ -498,7 +506,8 @@ int ff_dca_exss_parse(DCAExssParser *s, uint8_t *data, int size)
// Byte align
// CRC16 of extension substream header
if (ff_dca_seek_bits(&s->gb, header_size * 8)) {
av_log(s->avctx, AV_LOG_ERROR, "Read past end of EXSS header\n");
if (s->avctx)
av_log(s->avctx, AV_LOG_ERROR, "Read past end of EXSS header\n");
return AVERROR_INVALIDDATA;
}

2
libavcodec/dca_exss.h
View File

@ -87,6 +87,6 @@ typedef struct DCAExssParser {
DCAExssAsset assets[1]; ///< Audio asset descriptors
} DCAExssParser;
int ff_dca_exss_parse(DCAExssParser *s, uint8_t *data, int size);
int ff_dca_exss_parse(DCAExssParser *s, const uint8_t *data, int size);
#endif