summaryrefslogtreecommitdiff
path: root/contrib/ffmpeg/libavformat/mpeg.c
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/ffmpeg/libavformat/mpeg.c')
-rw-r--r--contrib/ffmpeg/libavformat/mpeg.c109
1 files changed, 69 insertions, 40 deletions
diff --git a/contrib/ffmpeg/libavformat/mpeg.c b/contrib/ffmpeg/libavformat/mpeg.c
index 709ce16f1..ae47fa60a 100644
--- a/contrib/ffmpeg/libavformat/mpeg.c
+++ b/contrib/ffmpeg/libavformat/mpeg.c
@@ -513,7 +513,7 @@ static int mpeg_mux_init(AVFormatContext *ctx)
for(i=0;i<ctx->nb_streams;i++) {
av_free(ctx->streams[i]->priv_data);
}
- return -ENOMEM;
+ return AVERROR(ENOMEM);
}
static inline void put_timestamp(ByteIOContext *pb, int id, int64_t timestamp)
@@ -1445,14 +1445,18 @@ static int mpegps_read_pes_header(AVFormatContext *s,
{
MpegDemuxContext *m = s->priv_data;
int len, size, startcode, c, flags, header_len;
- int64_t pts, dts, last_pos;
+ int pes_ext, ext2_len, id_ext, skip;
+ int64_t pts, dts;
+ int64_t last_sync= url_ftell(&s->pb);
- last_pos = -1;
+ error_redo:
+ url_fseek(&s->pb, last_sync, SEEK_SET);
redo:
/* next start code (should be immediately after) */
m->header_state = 0xff;
size = MAX_SYNC_SIZE;
startcode = find_next_start_code(&s->pb, &size, &m->header_state);
+ last_sync = url_ftell(&s->pb);
//printf("startcode=%x pos=0x%"PRIx64"\n", startcode, url_ftell(&s->pb));
if (startcode < 0)
return AVERROR_IO;
@@ -1475,18 +1479,18 @@ static int mpegps_read_pes_header(AVFormatContext *s,
/* find matching stream */
if (!((startcode >= 0x1c0 && startcode <= 0x1df) ||
(startcode >= 0x1e0 && startcode <= 0x1ef) ||
- (startcode == 0x1bd)))
+ (startcode == 0x1bd) || (startcode == 0x1fd)))
goto redo;
if (ppos) {
*ppos = url_ftell(&s->pb) - 4;
}
len = get_be16(&s->pb);
- pts = AV_NOPTS_VALUE;
+ pts =
dts = AV_NOPTS_VALUE;
/* stuffing */
for(;;) {
if (len < 1)
- goto redo;
+ goto error_redo;
c = get_byte(&s->pb);
len--;
/* XXX: for mpeg1, should test only bit 7 */
@@ -1495,23 +1499,17 @@ static int mpegps_read_pes_header(AVFormatContext *s,
}
if ((c & 0xc0) == 0x40) {
/* buffer scale & size */
- if (len < 2)
- goto redo;
get_byte(&s->pb);
c = get_byte(&s->pb);
len -= 2;
}
- if ((c & 0xf0) == 0x20) {
- if (len < 4)
- goto redo;
+ if ((c & 0xe0) == 0x20) {
dts = pts = get_pts(&s->pb, c);
len -= 4;
- } else if ((c & 0xf0) == 0x30) {
- if (len < 9)
- goto redo;
- pts = get_pts(&s->pb, c);
- dts = get_pts(&s->pb, -1);
- len -= 9;
+ if (c & 0x10){
+ dts = get_pts(&s->pb, -1);
+ len -= 5;
+ }
} else if ((c & 0xc0) == 0x80) {
/* mpeg 2 PES */
#if 0 /* some streams have this field set for no apparent reason */
@@ -1524,45 +1522,64 @@ static int mpegps_read_pes_header(AVFormatContext *s,
header_len = get_byte(&s->pb);
len -= 2;
if (header_len > len)
- goto redo;
- if ((flags & 0xc0) == 0x80) {
+ goto error_redo;
+ len -= header_len;
+ if (flags & 0x80) {
dts = pts = get_pts(&s->pb, -1);
- if (header_len < 5)
- goto redo;
header_len -= 5;
- len -= 5;
- } if ((flags & 0xc0) == 0xc0) {
- pts = get_pts(&s->pb, -1);
- dts = get_pts(&s->pb, -1);
- if (header_len < 10)
- goto redo;
- header_len -= 10;
- len -= 10;
+ if (flags & 0x40) {
+ dts = get_pts(&s->pb, -1);
+ header_len -= 5;
+ }
}
- len -= header_len;
- while (header_len > 0) {
- get_byte(&s->pb);
+ if (flags & 0x01) { /* PES extension */
+ pes_ext = get_byte(&s->pb);
header_len--;
+ if (pes_ext & 0x40) { /* pack header - should be zero in PS */
+ goto error_redo;
+ }
+ /* Skip PES private data, program packet sequence counter and P-STD buffer */
+ skip = (pes_ext >> 4) & 0xb;
+ skip += skip & 0x9;
+ url_fskip(&s->pb, skip);
+ header_len -= skip;
+
+ if (pes_ext & 0x01) { /* PES extension 2 */
+ ext2_len = get_byte(&s->pb);
+ header_len--;
+ if ((ext2_len & 0x7f) > 0) {
+ id_ext = get_byte(&s->pb);
+ if ((id_ext & 0x80) == 0)
+ startcode = ((startcode & 0xff) << 8) | id_ext;
+ header_len--;
+ }
+ }
}
+ if(header_len < 0)
+ goto error_redo;
+ url_fskip(&s->pb, header_len);
}
else if( c!= 0xf )
goto redo;
if (startcode == PRIVATE_STREAM_1 && !m->psm_es_type[startcode & 0xff]) {
- if (len < 1)
- goto redo;
startcode = get_byte(&s->pb);
len--;
- if (startcode >= 0x80 && startcode <= 0xbf) {
+ if (startcode >= 0x80 && startcode <= 0xcf) {
/* audio: skip header */
- if (len < 3)
- goto redo;
get_byte(&s->pb);
get_byte(&s->pb);
get_byte(&s->pb);
len -= 3;
+ if (startcode >= 0xb0 && startcode <= 0xbf) {
+ /* MLP/TrueHD audio has a 4-byte header */
+ get_byte(&s->pb);
+ len--;
+ }
}
}
+ if(len<0)
+ goto error_redo;
if(dts != AV_NOPTS_VALUE && ppos){
int i;
for(i=0; i<s->nb_streams; i++){
@@ -1641,15 +1658,27 @@ static int mpegps_read_packet(AVFormatContext *s,
} else if (startcode >= 0x80 && startcode <= 0x87) {
type = CODEC_TYPE_AUDIO;
codec_id = CODEC_ID_AC3;
- } else if (startcode >= 0x88 && startcode <= 0x9f) {
+ } else if ((startcode >= 0x88 && startcode <= 0x8f)
+ ||( startcode >= 0x98 && startcode <= 0x9f)) {
+ /* 0x90 - 0x97 is reserved for SDDS in DVD specs */
type = CODEC_TYPE_AUDIO;
codec_id = CODEC_ID_DTS;
- } else if (startcode >= 0xa0 && startcode <= 0xbf) {
+ } else if (startcode >= 0xa0 && startcode <= 0xaf) {
type = CODEC_TYPE_AUDIO;
codec_id = CODEC_ID_PCM_S16BE;
+ } else if (startcode >= 0xb0 && startcode <= 0xbf) {
+ type = CODEC_TYPE_AUDIO;
+ codec_id = CODEC_ID_MLP;
+ } else if (startcode >= 0xc0 && startcode <= 0xcf) {
+ /* Used for both AC-3 and E-AC-3 in EVOB files */
+ type = CODEC_TYPE_AUDIO;
+ codec_id = CODEC_ID_AC3;
} else if (startcode >= 0x20 && startcode <= 0x3f) {
type = CODEC_TYPE_SUBTITLE;
codec_id = CODEC_ID_DVD_SUBTITLE;
+ } else if (startcode >= 0xfd55 && startcode <= 0xfd5f) {
+ type = CODEC_TYPE_VIDEO;
+ codec_id = CODEC_ID_VC1;
} else {
skip:
/* skip packet */
@@ -1667,7 +1696,7 @@ static int mpegps_read_packet(AVFormatContext *s,
found:
if(st->discard >= AVDISCARD_ALL)
goto skip;
- if (startcode >= 0xa0 && startcode <= 0xbf) {
+ if (startcode >= 0xa0 && startcode <= 0xaf) {
int b1, freq;
/* for LPCM, we just skip the header and consider it is raw
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-26 19:59:41 +0000