mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
suppressed mpeg demux mess - use now dynamic stream creation api
Originally committed as revision 546 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard
parent
b9a281db69
commit
db7f1f95ac
401
libav/mpeg.c
401
libav/mpeg.c
@ -1,6 +1,6 @@
|
||||
/*
|
||||
* Output a MPEG1 multiplexed video/audio stream
|
||||
* Copyright (c) 2000 Gerard Lantau.
|
||||
* MPEG1 mux/demux
|
||||
* Copyright (c) 2000, 2001, 2002 Gerard Lantau.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
@ -62,8 +62,6 @@ typedef struct {
|
||||
#define AUDIO_ID 0xc0
|
||||
#define VIDEO_ID 0xe0
|
||||
|
||||
static int mpeg_mux_check_packet(AVFormatContext *s, int *size);
|
||||
|
||||
static int put_pack_header(AVFormatContext *ctx,
|
||||
UINT8 *buf, INT64 timestamp)
|
||||
{
|
||||
@ -150,15 +148,11 @@ static int put_system_header(AVFormatContext *ctx, UINT8 *buf)
|
||||
|
||||
static int mpeg_mux_init(AVFormatContext *ctx)
|
||||
{
|
||||
MpegMuxContext *s;
|
||||
MpegMuxContext *s = ctx->priv_data;
|
||||
int bitrate, i, mpa_id, mpv_id, ac3_id;
|
||||
AVStream *st;
|
||||
StreamInfo *stream;
|
||||
|
||||
s = av_mallocz(sizeof(MpegMuxContext));
|
||||
if (!s)
|
||||
return -1;
|
||||
ctx->priv_data = s;
|
||||
s->packet_number = 0;
|
||||
|
||||
/* XXX: hardcoded */
|
||||
@ -252,7 +246,6 @@ static int mpeg_mux_init(AVFormatContext *ctx)
|
||||
for(i=0;i<ctx->nb_streams;i++) {
|
||||
av_free(ctx->streams[i]->priv_data);
|
||||
}
|
||||
av_free(s);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
@ -409,9 +402,37 @@ static int mpeg_mux_end(AVFormatContext *ctx)
|
||||
|
||||
#define MAX_SYNC_SIZE 100000
|
||||
|
||||
static int mpegps_probe(AVProbeData *p)
|
||||
{
|
||||
int code, c, i;
|
||||
code = 0xff;
|
||||
|
||||
/* we search the first start code. If it is a packet start code,
|
||||
then we decide it is mpeg ps. We do not send highest value to
|
||||
give a chance to mpegts */
|
||||
for(i=0;i<p->buf_size;i++) {
|
||||
c = p->buf[i];
|
||||
code = (code << 8) | c;
|
||||
if ((code & 0xffffff00) == 0x100) {
|
||||
if (code == PACK_START_CODE ||
|
||||
code == SYSTEM_HEADER_START_CODE ||
|
||||
(code >= 0x1e0 && code <= 0x1ef) ||
|
||||
(code >= 0x1c0 && code <= 0x1df) ||
|
||||
code == PRIVATE_STREAM_2 ||
|
||||
code == PROGRAM_STREAM_MAP ||
|
||||
code == PRIVATE_STREAM_1 ||
|
||||
code == PADDING_STREAM)
|
||||
return AVPROBE_SCORE_MAX - 1;
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
typedef struct MpegDemuxContext {
|
||||
int header_state;
|
||||
int mux_rate; /* 50 byte/s unit */
|
||||
} MpegDemuxContext;
|
||||
|
||||
static int find_start_code(ByteIOContext *pb, int *size_ptr,
|
||||
@ -441,188 +462,12 @@ static int find_start_code(ByteIOContext *pb, int *size_ptr,
|
||||
return val;
|
||||
}
|
||||
|
||||
static int check_stream_id(AVFormatContext *s, int c_id)
|
||||
static int mpegps_read_header(AVFormatContext *s,
|
||||
AVFormatParameters *ap)
|
||||
{
|
||||
AVStream *st;
|
||||
int i;
|
||||
|
||||
for(i = 0;i < s->nb_streams;i++) {
|
||||
st = s->streams[i];
|
||||
if (st && st->id == c_id)
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mpeg_mux_read_header(AVFormatContext *s,
|
||||
AVFormatParameters *ap)
|
||||
{
|
||||
MpegDemuxContext *m;
|
||||
int size, startcode, c, rate_bound, audio_bound, video_bound, mux_rate, val;
|
||||
int codec_id, n, i, type, seems_dvd;
|
||||
AVStream *st;
|
||||
offset_t start_pos;
|
||||
|
||||
m = av_mallocz(sizeof(MpegDemuxContext));
|
||||
if (!m)
|
||||
return -ENOMEM;
|
||||
s->priv_data = m;
|
||||
seems_dvd = 0;
|
||||
|
||||
/* search first pack header */
|
||||
MpegDemuxContext *m = s->priv_data;
|
||||
m->header_state = 0xff;
|
||||
size = MAX_SYNC_SIZE;
|
||||
start_pos = url_ftell(&s->pb); /* remember this pos */
|
||||
for(;;) {
|
||||
/*while (size > 0) {
|
||||
startcode = find_start_code(&s->pb, &size, &m->header_state);
|
||||
if (startcode == PACK_START_CODE)
|
||||
goto found;
|
||||
}*/
|
||||
/* System Header not found find streams searching through file */
|
||||
//fprintf(stderr,"libav: MPEG-PS System Header not found!\n");
|
||||
url_fseek(&s->pb, start_pos, SEEK_SET);
|
||||
video_bound = 0;
|
||||
audio_bound = 0;
|
||||
c = 0;
|
||||
s->nb_streams = 0;
|
||||
//size = 15*MAX_SYNC_SIZE;
|
||||
while (size > 0) {
|
||||
type = 0;
|
||||
codec_id = 0;
|
||||
n = 0;
|
||||
startcode = find_start_code(&s->pb, &size, &m->header_state);
|
||||
//fprintf(stderr,"\nstartcode: %x pos=0x%Lx\n", startcode, url_ftell(&s->pb));
|
||||
if (startcode == 0x1bd) {
|
||||
url_fseek(&s->pb, -4, SEEK_CUR);
|
||||
size += 4;
|
||||
startcode = mpeg_mux_check_packet(s, &size);
|
||||
//fprintf(stderr,"\nstartcode: %x pos=0x%Lx\n", startcode, url_ftell(&s->pb));
|
||||
if (startcode >= 0x80 && startcode <= 0x9f && !check_stream_id(s, startcode)) {
|
||||
//fprintf(stderr,"Found AC3 stream ID: 0x%x\n", startcode);
|
||||
type = CODEC_TYPE_AUDIO;
|
||||
codec_id = CODEC_ID_AC3;
|
||||
audio_bound++;
|
||||
n = 1;
|
||||
c = startcode;
|
||||
seems_dvd = 1;
|
||||
}
|
||||
} else if (startcode == 0x1e0 && !check_stream_id(s, startcode)) {
|
||||
//fprintf(stderr,"Found MPEGVIDEO stream ID: 0x%x\n", startcode);
|
||||
type = CODEC_TYPE_VIDEO;
|
||||
codec_id = CODEC_ID_MPEG1VIDEO;
|
||||
n = 1;
|
||||
c = startcode;
|
||||
video_bound++;
|
||||
} else if (startcode >= 0x1c0 && startcode <= 0x1df && !seems_dvd && !check_stream_id(s, startcode)) {
|
||||
//fprintf(stderr,"Found MPEGAUDIO stream ID: 0x%x\n", startcode);
|
||||
type = CODEC_TYPE_AUDIO;
|
||||
codec_id = CODEC_ID_MP2;
|
||||
n = 1;
|
||||
c = startcode;
|
||||
audio_bound++;
|
||||
}
|
||||
for(i=0;i<n;i++) {
|
||||
st = av_mallocz(sizeof(AVStream));
|
||||
if (!st)
|
||||
return -ENOMEM;
|
||||
s->streams[s->nb_streams++] = st;
|
||||
st->id = c;
|
||||
st->codec.codec_type = type;
|
||||
st->codec.codec_id = codec_id;
|
||||
}
|
||||
}
|
||||
if (video_bound || audio_bound) {
|
||||
url_fseek(&s->pb, start_pos, SEEK_SET);
|
||||
return 0;
|
||||
} else
|
||||
return -ENODATA;
|
||||
found:
|
||||
/* search system header just after pack header */
|
||||
/* parse pack header */
|
||||
get_byte(&s->pb); /* ts1 */
|
||||
get_be16(&s->pb); /* ts2 */
|
||||
get_be16(&s->pb); /* ts3 */
|
||||
|
||||
mux_rate = get_byte(&s->pb) << 16;
|
||||
mux_rate |= get_byte(&s->pb) << 8;
|
||||
mux_rate |= get_byte(&s->pb);
|
||||
mux_rate &= (1 << 22) - 1;
|
||||
m->mux_rate = mux_rate;
|
||||
|
||||
startcode = find_start_code(&s->pb, &size, &m->header_state);
|
||||
if (startcode == SYSTEM_HEADER_START_CODE)
|
||||
break;
|
||||
}
|
||||
size = get_be16(&s->pb);
|
||||
rate_bound = get_byte(&s->pb) << 16;
|
||||
rate_bound |= get_byte(&s->pb) << 8;
|
||||
rate_bound |= get_byte(&s->pb);
|
||||
rate_bound = (rate_bound >> 1) & ((1 << 22) - 1);
|
||||
audio_bound = get_byte(&s->pb) >> 2;
|
||||
video_bound = get_byte(&s->pb) & 0x1f;
|
||||
get_byte(&s->pb); /* reserved byte */
|
||||
#if 0
|
||||
printf("mux_rate=%d kbit/s\n", (m->mux_rate * 50 * 8) / 1000);
|
||||
printf("rate_bound=%d\n", rate_bound);
|
||||
printf("audio_bound=%d\n", audio_bound);
|
||||
printf("video_bound=%d\n", video_bound);
|
||||
#endif
|
||||
size -= 6;
|
||||
s->nb_streams = 0;
|
||||
while (size > 0) {
|
||||
c = get_byte(&s->pb);
|
||||
size--;
|
||||
if ((c & 0x80) == 0)
|
||||
break;
|
||||
val = get_be16(&s->pb);
|
||||
size -= 2;
|
||||
if (c >= 0xc0 && c <= 0xdf) {
|
||||
/* mpeg audio stream */
|
||||
type = CODEC_TYPE_AUDIO;
|
||||
codec_id = CODEC_ID_MP2;
|
||||
n = 1;
|
||||
c = c | 0x100;
|
||||
} else if (c >= 0xe0 && c <= 0xef) {
|
||||
type = CODEC_TYPE_VIDEO;
|
||||
codec_id = CODEC_ID_MPEG1VIDEO;
|
||||
n = 1;
|
||||
c = c | 0x100;
|
||||
} else if (c == 0xb8) {
|
||||
/* all audio streams */
|
||||
/* XXX: hack for DVD: we force AC3, although we do not
|
||||
know that this codec will be used */
|
||||
type = CODEC_TYPE_AUDIO;
|
||||
codec_id = CODEC_ID_AC3;
|
||||
/* XXX: Another hack for DVD: it seems, that AC3 streams
|
||||
aren't signaled on audio_bound on some DVDs (Matrix) */
|
||||
if (audio_bound == 0)
|
||||
audio_bound++;
|
||||
n = audio_bound;
|
||||
c = 0x80;
|
||||
//c = 0x1c0;
|
||||
} else if (c == 0xb9) {
|
||||
/* all video streams */
|
||||
type = CODEC_TYPE_VIDEO;
|
||||
codec_id = CODEC_ID_MPEG1VIDEO;
|
||||
n = video_bound;
|
||||
c = 0x1e0;
|
||||
} else {
|
||||
type = 0;
|
||||
codec_id = 0;
|
||||
n = 0;
|
||||
}
|
||||
for(i=0;i<n;i++) {
|
||||
st = av_mallocz(sizeof(AVStream));
|
||||
if (!st)
|
||||
return -ENOMEM;
|
||||
s->streams[s->nb_streams++] = st;
|
||||
st->id = c + i;
|
||||
st->codec.codec_type = type;
|
||||
st->codec.codec_id = codec_id;
|
||||
}
|
||||
}
|
||||
|
||||
/* no need to do more */
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -641,12 +486,12 @@ static INT64 get_pts(ByteIOContext *pb, int c)
|
||||
return pts;
|
||||
}
|
||||
|
||||
static int mpeg_mux_read_packet(AVFormatContext *s,
|
||||
AVPacket *pkt)
|
||||
static int mpegps_read_packet(AVFormatContext *s,
|
||||
AVPacket *pkt)
|
||||
{
|
||||
MpegDemuxContext *m = s->priv_data;
|
||||
AVStream *st;
|
||||
int len, size, startcode, i, c, flags, header_len;
|
||||
int len, size, startcode, i, c, flags, header_len, type, codec_id;
|
||||
INT64 pts, dts;
|
||||
|
||||
/* next start code (should be immediately after */
|
||||
@ -745,149 +590,69 @@ static int mpeg_mux_read_packet(AVFormatContext *s,
|
||||
if (st->id == startcode)
|
||||
goto found;
|
||||
}
|
||||
/* skip packet */
|
||||
url_fskip(&s->pb, len);
|
||||
goto redo;
|
||||
/* no stream found: add a new stream */
|
||||
st = av_new_stream(s, startcode);
|
||||
if (!st)
|
||||
goto skip;
|
||||
if (startcode >= 0x1e0 && startcode <= 0x1ef) {
|
||||
type = CODEC_TYPE_VIDEO;
|
||||
codec_id = CODEC_ID_MPEG1VIDEO;
|
||||
} else if (startcode >= 0x1c0 && startcode <= 0x1df) {
|
||||
type = CODEC_TYPE_AUDIO;
|
||||
codec_id = CODEC_ID_MP2;
|
||||
} else if (startcode >= 0x80 && startcode <= 0x9f) {
|
||||
type = CODEC_TYPE_AUDIO;
|
||||
codec_id = CODEC_ID_AC3;
|
||||
} else {
|
||||
skip:
|
||||
/* skip packet */
|
||||
url_fskip(&s->pb, len);
|
||||
goto redo;
|
||||
}
|
||||
st->codec.codec_type = type;
|
||||
st->codec.codec_id = codec_id;
|
||||
found:
|
||||
av_new_packet(pkt, len);
|
||||
//printf("\nRead Packet ID: %x PTS: %f Size: %d", startcode,
|
||||
// (float)pts/90000, len);
|
||||
get_buffer(&s->pb, pkt->data, pkt->size);
|
||||
pkt->pts = pts;
|
||||
pkt->stream_index = i;
|
||||
pkt->stream_index = st->index;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mpeg_mux_check_packet(AVFormatContext *s, int *size)
|
||||
static int mpegps_read_close(AVFormatContext *s)
|
||||
{
|
||||
MpegDemuxContext *m = s->priv_data;
|
||||
int len, startcode, c, n, flags, header_len;
|
||||
INT64 pts, dts;
|
||||
|
||||
/* next start code (should be immediately after */
|
||||
redo:
|
||||
m->header_state = 0xff;
|
||||
startcode = find_start_code(&s->pb, size, &m->header_state);
|
||||
|
||||
if (startcode < 0)
|
||||
return -EIO;
|
||||
if (startcode == PACK_START_CODE)
|
||||
goto redo;
|
||||
if (startcode == SYSTEM_HEADER_START_CODE)
|
||||
goto redo;
|
||||
if (startcode == PADDING_STREAM ||
|
||||
startcode == PRIVATE_STREAM_2) {
|
||||
/* skip them */
|
||||
len = get_be16(&s->pb);
|
||||
url_fskip(&s->pb, len);
|
||||
goto redo;
|
||||
}
|
||||
/* find matching stream */
|
||||
if (!((startcode >= 0x1c0 && startcode <= 0x1df) ||
|
||||
(startcode >= 0x1e0 && startcode <= 0x1ef) ||
|
||||
(startcode == 0x1bd)))
|
||||
goto redo;
|
||||
|
||||
n = *size;
|
||||
len = get_be16(&s->pb);
|
||||
n -= 2;
|
||||
pts = 0;
|
||||
dts = 0;
|
||||
/* stuffing */
|
||||
for(;;) {
|
||||
c = get_byte(&s->pb);
|
||||
len--;
|
||||
n--;
|
||||
/* XXX: for mpeg1, should test only bit 7 */
|
||||
if (c != 0xff)
|
||||
break;
|
||||
}
|
||||
if ((c & 0xc0) == 0x40) {
|
||||
/* buffer scale & size */
|
||||
get_byte(&s->pb);
|
||||
c = get_byte(&s->pb);
|
||||
len -= 2;
|
||||
n -= 2;
|
||||
}
|
||||
if ((c & 0xf0) == 0x20) {
|
||||
pts = get_pts(&s->pb, c);
|
||||
len -= 4;
|
||||
n -= 4;
|
||||
dts = pts;
|
||||
} else if ((c & 0xf0) == 0x30) {
|
||||
pts = get_pts(&s->pb, c);
|
||||
dts = get_pts(&s->pb, -1);
|
||||
len -= 9;
|
||||
n -= 9;
|
||||
} else if ((c & 0xc0) == 0x80) {
|
||||
/* mpeg 2 PES */
|
||||
if ((c & 0x30) != 0) {
|
||||
fprintf(stderr, "Encrypted multiplex not handled\n");
|
||||
return -EIO;
|
||||
}
|
||||
flags = get_byte(&s->pb);
|
||||
header_len = get_byte(&s->pb);
|
||||
len -= 2;
|
||||
n -= 2;
|
||||
if (header_len > len)
|
||||
goto redo;
|
||||
if ((flags & 0xc0) == 0x40) {
|
||||
pts = get_pts(&s->pb, -1);
|
||||
dts = pts;
|
||||
header_len -= 5;
|
||||
len -= 5;
|
||||
n -= 5;
|
||||
} if ((flags & 0xc0) == 0xc0) {
|
||||
pts = get_pts(&s->pb, -1);
|
||||
dts = get_pts(&s->pb, -1);
|
||||
header_len -= 10;
|
||||
len -= 10;
|
||||
n -= 10;
|
||||
}
|
||||
len -= header_len;
|
||||
n -= header_len;
|
||||
while (header_len > 0) {
|
||||
get_byte(&s->pb);
|
||||
header_len--;
|
||||
}
|
||||
}
|
||||
if (startcode == 0x1bd) {
|
||||
startcode = get_byte(&s->pb);
|
||||
len--;
|
||||
n--;
|
||||
if (startcode >= 0x80 && startcode <= 0xbf) {
|
||||
/* audio: skip header */
|
||||
get_byte(&s->pb);
|
||||
get_byte(&s->pb);
|
||||
get_byte(&s->pb);
|
||||
len -= 3;
|
||||
n -= 3;
|
||||
}
|
||||
}
|
||||
*size = n;
|
||||
return startcode;
|
||||
}
|
||||
|
||||
|
||||
static int mpeg_mux_read_close(AVFormatContext *s)
|
||||
{
|
||||
MpegDemuxContext *m = s->priv_data;
|
||||
av_free(m);
|
||||
return 0;
|
||||
}
|
||||
|
||||
AVFormat mpeg_mux_format = {
|
||||
static AVOutputFormat mpegps_mux = {
|
||||
"mpeg",
|
||||
"MPEG multiplex format",
|
||||
"MPEG PS format",
|
||||
"video/x-mpeg",
|
||||
"mpg,mpeg,vob",
|
||||
sizeof(MpegMuxContext),
|
||||
CODEC_ID_MP2,
|
||||
CODEC_ID_MPEG1VIDEO,
|
||||
mpeg_mux_init,
|
||||
mpeg_mux_write_packet,
|
||||
mpeg_mux_end,
|
||||
|
||||
mpeg_mux_read_header,
|
||||
mpeg_mux_read_packet,
|
||||
mpeg_mux_read_close,
|
||||
};
|
||||
|
||||
static AVInputFormat mpegps_demux = {
|
||||
"mpeg",
|
||||
"MPEG PS format",
|
||||
sizeof(MpegDemuxContext),
|
||||
mpegps_probe,
|
||||
mpegps_read_header,
|
||||
mpegps_read_packet,
|
||||
mpegps_read_close,
|
||||
flags: AVFMT_NOHEADER,
|
||||
};
|
||||
|
||||
int mpegps_init(void)
|
||||
{
|
||||
av_register_output_format(&mpegps_mux);
|
||||
av_register_input_format(&mpegps_demux);
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user