Commit 3646ef6f authored by Michael Niedermayer's avatar Michael Niedermayer

avformat/h264dec: Check pps_id/sps_id fields from parameter sets

Fixes a misdetection in wav.detected.as.h264.error.wav
Signed-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
parent dc750194
......@@ -19,17 +19,26 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavcodec/get_bits.h"
#include "libavcodec/golomb.h"
#include "avformat.h"
#include "rawdec.h"
#include "libavcodec/internal.h"
#define MAX_SPS_COUNT 32
#define MAX_PPS_COUNT 256
static int h264_probe(AVProbeData *p)
{
uint32_t code = -1;
int sps = 0, pps = 0, idr = 0, res = 0, sli = 0;
int i;
int i, ret;
int pps_ids[MAX_PPS_COUNT+1] = {0};
int sps_ids[MAX_SPS_COUNT+1] = {0};
unsigned pps_id, sps_id;
GetBitContext gb;
for (i = 0; i < p->buf_size; i++) {
for (i = 0; i + 2 < p->buf_size; i++) {
code = (code << 8) + p->buf[i];
if ((code & 0xffffff00) == 0x100) {
int ref_idc = (code >> 5) & 3;
......@@ -53,19 +62,48 @@ static int h264_probe(AVProbeData *p)
res++;
}
ret = init_get_bits8(&gb, p->buf + i + 1, p->buf_size - i - 1);
if (ret < 0)
return 0;
switch (type) {
case 1:
sli++;
break;
case 5:
idr++;
get_ue_golomb_long(&gb);
if (get_ue_golomb_31(&gb) > 9U)
return 0;
pps_id = get_ue_golomb_long(&gb);
if (pps_id > MAX_PPS_COUNT)
return 0;
if (!pps_ids[pps_id])
break;
if (type == 1)
sli++;
else
idr++;
break;
case 7:
if (p->buf[i + 2] & 0x03)
skip_bits(&gb, 14);
if (get_bits(&gb, 2))
return 0;
skip_bits(&gb, 8);
sps_id = get_ue_golomb_31(&gb);
if (sps_id > MAX_SPS_COUNT)
return 0;
sps_ids[sps_id] = 1;
sps++;
break;
case 8:
pps_id = get_ue_golomb_long(&gb);
if (pps_id > MAX_PPS_COUNT)
return 0;
sps_id = get_ue_golomb_31(&gb);
if (sps_id > MAX_SPS_COUNT)
return 0;
if (!sps_ids[sps_id])
break;
pps_ids[pps_id] = 1;
pps++;
break;
}
......
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