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aacdec: Make aac-latm closer to the spec (not reading random data leading to random false configurations)

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-09-23 22:34:26 +02:00
parent ad51833a1a
commit b6aaa6d9a0
1 changed files with 7 additions and 7 deletions
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14
libavcodec/aacdec.c
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@ -460,7 +460,7 @@ static int decode_ga_specific_config(AACContext *ac, AVCodecContext *avctx,
static int decode_audio_specific_config(AACContext *ac,
AVCodecContext *avctx,
MPEG4AudioConfig *m4ac,
const uint8_t *data, int data_size)
const uint8_t *data, int data_size, int asclen)
{
GetBitContext gb;
int i;
@ -472,7 +472,7 @@ static int decode_audio_specific_config(AACContext *ac,
init_get_bits(&gb, data, data_size * 8);
if ((i = ff_mpeg4audio_get_config(m4ac, data, data_size)) < 0)
if ((i = ff_mpeg4audio_get_config(m4ac, data, asclen/8)) < 0)
return -1;
if (m4ac->sampling_index > 12) {
av_log(avctx, AV_LOG_ERROR, "invalid sampling rate index %d\n", m4ac->sampling_index);
@ -572,7 +572,7 @@ static av_cold int aac_decode_init(AVCodecContext *avctx)
if (avctx->extradata_size > 0) {
if (decode_audio_specific_config(ac, ac->avctx, &ac->m4ac,
avctx->extradata,
avctx->extradata_size) < 0)
avctx->extradata_size, 8*avctx->extradata_size) < 0)
return -1;
} else {
int sr, i;
@ -2309,7 +2309,7 @@ static inline uint32_t latm_get_value(GetBitContext *b)
}
static int latm_decode_audio_specific_config(struct LATMContext *latmctx,
GetBitContext *gb)
GetBitContext *gb, int asclen)
{
AVCodecContext *avctx = latmctx->aac_ctx.avctx;
MPEG4AudioConfig m4ac;
@ -2324,7 +2324,7 @@ static int latm_decode_audio_specific_config(struct LATMContext *latmctx,
bits_consumed =
decode_audio_specific_config(NULL, avctx, &m4ac,
gb->buffer + (config_start_bit / 8),
get_bits_left(gb) / 8);
get_bits_left(gb) / 8, asclen);
if (bits_consumed < 0)
return AVERROR_INVALIDDATA;
@ -2382,11 +2382,11 @@ static int read_stream_mux_config(struct LATMContext *latmctx,
// for all but first stream: use_same_config = get_bits(gb, 1);
if (!audio_mux_version) {
if ((ret = latm_decode_audio_specific_config(latmctx, gb)) < 0)
if ((ret = latm_decode_audio_specific_config(latmctx, gb, 0)) < 0)
return ret;
} else {
int ascLen = latm_get_value(gb);
if ((ret = latm_decode_audio_specific_config(latmctx, gb)) < 0)
if ((ret = latm_decode_audio_specific_config(latmctx, gb, ascLen)) < 0)
return ret;
ascLen -= ret;
skip_bits_long(gb, ascLen);