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Revised patch for HD DVD .EVO demuxing by (Ian Caulfield <lowercase name seperated by . place at here gmail place a dot here com>)

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Originally committed as revision 7853 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2007-02-06 19:14:16 +00:00
parent 7d4495dafe
commit aad512b4ec
2 changed files with 47 additions and 5 deletions
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1
libavcodec/avcodec.h
View File

@ -238,6 +238,7 @@ enum CodecID {
CODEC_ID_DSICINAUDIO,
CODEC_ID_IMC,
CODEC_ID_MUSEPACK7,
CODEC_ID_MLP,
/* subtitle codecs */
CODEC_ID_DVD_SUBTITLE= 0x17000,

51
libavformat/mpeg.c
View File

@ -1445,6 +1445,7 @@ static int mpegps_read_pes_header(AVFormatContext *s,
{
MpegDemuxContext *m = s->priv_data;
int len, size, startcode, c, flags, header_len;
int pes_ext, ext2_len, id_ext, skip;
int64_t pts, dts;
int64_t last_sync= url_ftell(&s->pb);
@ -1478,7 +1479,7 @@ 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;
@ -1531,6 +1532,29 @@ static int mpegps_read_pes_header(AVFormatContext *s,
header_len -= 5;
}
}
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);
@ -1541,12 +1565,17 @@ static int mpegps_read_pes_header(AVFormatContext *s,
if (startcode == PRIVATE_STREAM_1 && !m->psm_es_type[startcode & 0xff]) {
startcode = get_byte(&s->pb);
len--;
if (startcode >= 0x80 && startcode <= 0xbf) {
if (startcode >= 0x80 && startcode <= 0xcf) {
/* audio: skip header */
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)
@ -1629,15 +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 */
@ -1655,7 +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