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dcadec: Add some logging before returning on error 

Based on a patch by Michael Niedermayer.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Tim Walker 2013-11-29 18:12:26 +01:00 committed by Luca Barbato
parent f058f384a0
commit 7dc827b709
1 changed files with 21 additions and 5 deletions
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26
libavcodec/dcadec.c
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@ -263,6 +263,8 @@ static const int8_t dca_channel_reorder_nolfe_xch[][9] = {
#define DCA_BUFFER_PADDING_SIZE 1024
#define DCA_NSYNCAUX 0x9A1105A0
/** Bit allocation */
typedef struct {
int offset; ///< code values offset
@ -1283,6 +1285,7 @@ static int dca_filter_channels(DCAContext *s, int block_index)
static int dca_subframe_footer(DCAContext *s, int base_channel)
{
int in, out, aux_data_count, aux_data_end, reserved;
uint32_t nsyncaux;
/*
* Unpack optional information
@ -1301,8 +1304,11 @@ static int dca_subframe_footer(DCAContext *s, int base_channel)
aux_data_end = 8 * aux_data_count + get_bits_count(&s->gb);
if (get_bits_long(&s->gb, 32) != 0x9A1105A0) // nSYNCAUX
if ((nsyncaux = get_bits_long(&s->gb, 32)) != DCA_NSYNCAUX) {
av_log(s->avctx, AV_LOG_ERROR, "nSYNCAUX mismatch %#"PRIx32"\n",
nsyncaux);
return AVERROR_INVALIDDATA;
}
if (get_bits1(&s->gb)) { // bAUXTimeStampFlag
avpriv_request_sample(s->avctx,
@ -1314,7 +1320,8 @@ static int dca_subframe_footer(DCAContext *s, int base_channel)
}
if ((s->core_downmix = get_bits1(&s->gb))) {
switch (get_bits(&s->gb, 3)) {
int am = get_bits(&s->gb, 3);
switch (am) {
case 0:
s->core_downmix_amode = DCA_MONO;
break;
@ -1337,13 +1344,20 @@ static int dca_subframe_footer(DCAContext *s, int base_channel)
s->core_downmix_amode = DCA_3F1R;
break;
default:
av_log(s->avctx, AV_LOG_ERROR,
"Invalid mode %d for embedded downmix coefficients\n",
am);
return AVERROR_INVALIDDATA;
}
for (out = 0; out < dca_channels[s->core_downmix_amode]; out++) {
for (in = 0; in < s->prim_channels + !!s->lfe; in++) {
uint16_t tmp = get_bits(&s->gb, 9);
if ((tmp & 0xFF) > 241)
if ((tmp & 0xFF) > 241) {
av_log(s->avctx, AV_LOG_ERROR,
"Invalid downmix coefficient code %"PRIu16"\n",
tmp);
return AVERROR_INVALIDDATA;
}
s->core_downmix_codes[in][out] = tmp;
}
}
@ -1353,9 +1367,11 @@ static int dca_subframe_footer(DCAContext *s, int base_channel)
skip_bits(&s->gb, 16); // nAUXCRC16
// additional data (reserved, cf. ETSI TS 102 114 V1.4.1)
if ((reserved = (aux_data_end - get_bits_count(&s->gb))) < 0)
if ((reserved = (aux_data_end - get_bits_count(&s->gb))) < 0) {
av_log(s->avctx, AV_LOG_ERROR,
"Overread auxiliary data by %d bits\n", -reserved);
return AVERROR_INVALIDDATA;
else if (reserved) {
} else if (reserved) {
avpriv_request_sample(s->avctx,
"Core auxiliary data reserved content");
skip_bits_long(&s->gb, reserved);