mirror of
https://github.com/mpv-player/mpv
synced 2024-12-15 03:15:52 +00:00
0c1bac17b9
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@1339 b3059339-0415-0410-9bf9-f77b7e298cf2
336 lines
9.6 KiB
C
336 lines
9.6 KiB
C
// MPG/VOB file parser for DEMUXER v2.5 by A'rpi/ESP-team
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
extern int verbose; // defined in mplayer.c
|
|
|
|
#include "config.h"
|
|
#include "dvdauth.h"
|
|
#include "stream.h"
|
|
#include "demuxer.h"
|
|
|
|
//#define MAX_PS_PACKETSIZE 2048
|
|
#define MAX_PS_PACKETSIZE (224*1024)
|
|
|
|
static int mpeg_pts_error=0;
|
|
|
|
static unsigned int read_mpeg_timestamp(stream_t *s,int c){
|
|
int d,e;
|
|
unsigned int pts;
|
|
d=stream_read_word(s);
|
|
e=stream_read_word(s);
|
|
if( ((c&1)!=1) || ((d&1)!=1) || ((e&1)!=1) ){
|
|
++mpeg_pts_error;
|
|
return 0; // invalid pts
|
|
}
|
|
pts=(((c>>1)&7)<<30)|((d>>1)<<15)|(e>>1);
|
|
if(verbose>=3) printf("{%d}",pts);
|
|
return pts;
|
|
}
|
|
|
|
//static unsigned int packet_start_pos=0;
|
|
|
|
extern void *new_sh_audio(demuxer_t *demux,int id);
|
|
extern void *new_sh_video(demuxer_t *demux,int id);
|
|
|
|
static int demux_mpg_read_packet(demuxer_t *demux,int id){
|
|
int d;
|
|
int len;
|
|
#ifdef HAVE_LIBCSS
|
|
int css=0;
|
|
#endif
|
|
unsigned char c=0;
|
|
unsigned int pts=0;
|
|
unsigned int dts=0;
|
|
demux_stream_t *ds=NULL;
|
|
|
|
if(verbose>=3) printf("demux_read_packet: %X\n",id);
|
|
|
|
// if(id==0x1F0){
|
|
// demux->synced=0; // force resync after 0x1F0
|
|
// return -1;
|
|
//}
|
|
|
|
// if(id==0x1BA) packet_start_pos=stream_tell(demux->stream);
|
|
if(id<0x1BC || id>=0x1F0) return -1;
|
|
if(id==0x1BE) return -1; // padding stream
|
|
if(id==0x1BF) return -1; // private2
|
|
|
|
len=stream_read_word(demux->stream);
|
|
if(verbose>=3) printf("PACKET len=%d",len);
|
|
// if(len==62480){ demux->synced=0;return -1;} /* :) */
|
|
if(len==0 || len>MAX_PS_PACKETSIZE){
|
|
if(verbose>=2) printf("Invalid PS packet len: %d\n",len);
|
|
return -2; // invalid packet !!!!!!
|
|
}
|
|
|
|
mpeg_pts_error=0;
|
|
|
|
while(len>0){ // Skip stuFFing bytes
|
|
c=stream_read_char(demux->stream);--len;
|
|
if(c!=0xFF)break;
|
|
}
|
|
if((c>>6)==1){ // Read (skip) STD scale & size value
|
|
// printf(" STD_scale=%d",(c>>5)&1);
|
|
d=((c&0x1F)<<8)|stream_read_char(demux->stream);
|
|
len-=2;
|
|
// printf(" STD_size=%d",d);
|
|
c=stream_read_char(demux->stream);
|
|
}
|
|
// Read System-1 stream timestamps:
|
|
if((c>>4)==2){
|
|
pts=read_mpeg_timestamp(demux->stream,c);
|
|
len-=4;
|
|
} else
|
|
if((c>>4)==3){
|
|
pts=read_mpeg_timestamp(demux->stream,c);
|
|
c=stream_read_char(demux->stream);
|
|
if((c>>4)!=1) pts=0; //printf("{ERROR4}");
|
|
dts=read_mpeg_timestamp(demux->stream,c);
|
|
len-=4+1+4;
|
|
} else
|
|
if((c>>6)==2){
|
|
int pts_flags;
|
|
int hdrlen;
|
|
// System-2 (.VOB) stream:
|
|
if((c>>4)&3) {
|
|
#ifdef HAVE_LIBCSS
|
|
css=1;
|
|
#else
|
|
printf("Encrypted VOB file (not compiled with libcss support)! Read file DOCS/DVD\n");
|
|
#endif
|
|
}
|
|
c=stream_read_char(demux->stream); pts_flags=c>>6;
|
|
c=stream_read_char(demux->stream); hdrlen=c;
|
|
len-=2;
|
|
if(verbose>=3) printf(" hdrlen=%d (len=%d)",hdrlen,len);
|
|
if(hdrlen>len){ printf("demux_mpg: invalid header length \n"); return -1;}
|
|
if(pts_flags==2){
|
|
c=stream_read_char(demux->stream);
|
|
pts=read_mpeg_timestamp(demux->stream,c);
|
|
len-=5;hdrlen-=5;
|
|
} else
|
|
if(pts_flags==3){
|
|
c=stream_read_char(demux->stream);
|
|
pts=read_mpeg_timestamp(demux->stream,c);
|
|
c=stream_read_char(demux->stream);
|
|
dts=read_mpeg_timestamp(demux->stream,c);
|
|
len-=10;hdrlen-=10;
|
|
}
|
|
len-=hdrlen;
|
|
if(hdrlen>0) stream_skip(demux->stream,hdrlen); // skip header bytes
|
|
|
|
//============== DVD Audio sub-stream ======================
|
|
if(id==0x1BD){
|
|
int aid=stream_read_char(demux->stream);--len;
|
|
if(len<3) return -1; // invalid audio packet
|
|
|
|
// AID:
|
|
// 0x20..0x3F subtitle
|
|
// 0x80..0x9F AC3 audio
|
|
// 0xA0..0xBF PCM audio
|
|
|
|
if((aid & 0xE0) == 0x20){
|
|
// subtitle:
|
|
aid&=0x1F;
|
|
|
|
if(!demux->s_streams[aid]){
|
|
printf("==> Found subtitle: %d\n",aid);
|
|
demux->s_streams[aid]=1;
|
|
}
|
|
|
|
if(demux->sub->id==aid){
|
|
ds=demux->sub;
|
|
}
|
|
|
|
} else if((aid & 0xC0) == 0x80) {
|
|
|
|
// aid=128+(aid&0x7F);
|
|
// aid=0x80..0xBF
|
|
|
|
if(!demux->a_streams[aid]) new_sh_audio(demux,aid);
|
|
if(demux->audio->id==-1) demux->audio->id=aid;
|
|
|
|
if(demux->audio->id==aid){
|
|
// int type;
|
|
ds=demux->audio;
|
|
if(!ds->sh) ds->sh=demux->a_streams[aid];
|
|
// READ Packet: Skip additional audio header data:
|
|
c=stream_read_char(demux->stream);//type=c;
|
|
c=stream_read_char(demux->stream);//type|=c<<8;
|
|
c=stream_read_char(demux->stream);//type|=c<<16;
|
|
// printf("[%06X]",type);
|
|
len-=3;
|
|
if((aid&0xE0)==0xA0 && len>=2){
|
|
// read PCM header
|
|
int head;
|
|
head=stream_read_char(demux->stream); head=c<<8;
|
|
c=stream_read_char(demux->stream); head|=c; len-=2;
|
|
while(len>0 && head!=0x180){
|
|
head=c<<8;
|
|
c=stream_read_char(demux->stream);
|
|
head|=c;--len;
|
|
}
|
|
if(!len) printf("End of packet while searching for PCM header\n");
|
|
}
|
|
} // if(demux->audio->id==aid)
|
|
|
|
} else printf("Unknown 0x1BD substream: 0x%02X \n",aid);
|
|
|
|
} //if(id==0x1BD)
|
|
|
|
} else {
|
|
if(c!=0x0f){
|
|
if (verbose>=1) printf(" {ERROR5,c=%d} \n",c);
|
|
return -1; // invalid packet !!!!!!
|
|
}
|
|
}
|
|
if(mpeg_pts_error) printf(" {PTS_err:%d} \n",mpeg_pts_error);
|
|
if(verbose>=3) printf(" => len=%d\n",len);
|
|
|
|
// if(len<=0 || len>MAX_PS_PACKETSIZE) return -1; // Invalid packet size
|
|
if(len<=0 || len>MAX_PS_PACKETSIZE){
|
|
if(verbose>=2) printf("Invalid PS data len: %d\n",len);
|
|
return -1; // invalid packet !!!!!!
|
|
}
|
|
|
|
if(id>=0x1C0 && id<=0x1DF){
|
|
// mpeg audio
|
|
int aid=id-0x1C0;
|
|
if(!demux->a_streams[aid]) new_sh_audio(demux,aid);
|
|
if(demux->audio->id==-1) demux->audio->id=aid;
|
|
if(demux->audio->id==aid){
|
|
ds=demux->audio;
|
|
if(!ds->sh) ds->sh=demux->a_streams[aid];
|
|
}
|
|
} else
|
|
if(id>=0x1E0 && id<=0x1EF){
|
|
// mpeg video
|
|
int aid=id-0x1E0;
|
|
if(!demux->v_streams[aid]) new_sh_video(demux,aid);
|
|
if(demux->video->id==-1) demux->video->id=aid;
|
|
if(demux->video->id==aid){
|
|
ds=demux->video;
|
|
if(!ds->sh) ds->sh=demux->v_streams[aid];
|
|
}
|
|
}
|
|
|
|
if(ds){
|
|
if(verbose>=2) printf("DEMUX_MPG: Read %d data bytes from packet %04X\n",len,id);
|
|
// printf("packet start = 0x%X \n",stream_tell(demux->stream)-packet_start_pos);
|
|
#ifdef HAVE_LIBCSS
|
|
if (css) {
|
|
if (descrambling) CSSDescramble(demux->stream->buffer,key_title); else
|
|
printf("Encrypted stream but authentication was not requested by you!!\n");
|
|
}
|
|
#endif
|
|
ds_read_packet(ds,demux->stream,len,pts/90000.0f,0,0);
|
|
// if(ds==demux->sub) parse_dvdsub(ds->last->buffer,ds->last->len);
|
|
return 1;
|
|
}
|
|
if(verbose>=2) printf("DEMUX_MPG: Skipping %d data bytes from packet %04X\n",len,id);
|
|
if(len<=2356) stream_skip(demux->stream,len);
|
|
return 0;
|
|
}
|
|
|
|
int num_elementary_packets100=0;
|
|
int num_elementary_packets101=0;
|
|
int num_elementary_packets1B6=0;
|
|
int num_elementary_packetsPES=0;
|
|
|
|
int demux_mpg_es_fill_buffer(demuxer_t *demux){
|
|
// Elementary video stream
|
|
if(demux->stream->eof) return 0;
|
|
demux->filepos=stream_tell(demux->stream);
|
|
ds_read_packet(demux->video,demux->stream,STREAM_BUFFER_SIZE,0,0,0);
|
|
return 1;
|
|
}
|
|
|
|
int demux_mpg_fill_buffer(demuxer_t *demux){
|
|
unsigned int head=0;
|
|
int skipped=0;
|
|
int max_packs=128;
|
|
int ret=0;
|
|
|
|
// System stream
|
|
do{
|
|
demux->filepos=stream_tell(demux->stream);
|
|
head=stream_read_dword(demux->stream);
|
|
if((head&0xFFFFFF00)!=0x100){
|
|
// sync...
|
|
demux->filepos-=skipped;
|
|
while(1){
|
|
int c=stream_read_char(demux->stream);
|
|
if(c<0) break; //EOF
|
|
head<<=8;
|
|
if(head!=0x100){
|
|
head|=c;
|
|
++skipped; //++demux->filepos;
|
|
continue;
|
|
}
|
|
head|=c;
|
|
break;
|
|
}
|
|
demux->filepos+=skipped;
|
|
}
|
|
if(stream_eof(demux->stream)) break;
|
|
// sure: head=0x000001XX
|
|
if(verbose>=4) printf("*** head=0x%X\n",head);
|
|
if(demux->synced==0){
|
|
if(head==0x1BA) demux->synced=1;
|
|
#if 0
|
|
else if(head>=0x1C0 && head<=0x1EF){
|
|
demux->synced=2;
|
|
if(verbose) printf("Mpeg PES stream synced at 0x%X (%d)!\n",demux->filepos,demux->filepos);
|
|
num_elementary_packets100=0; // requires for re-sync!
|
|
num_elementary_packets101=0; // requires for re-sync!
|
|
}
|
|
#endif
|
|
} else
|
|
if(demux->synced==1){
|
|
if(head==0x1BB || head==0x1BD || (head>=0x1C0 && head<=0x1EF)){
|
|
demux->synced=2;
|
|
if(verbose) printf("system stream synced at 0x%X (%d)!\n",demux->filepos,demux->filepos);
|
|
num_elementary_packets100=0; // requires for re-sync!
|
|
num_elementary_packets101=0; // requires for re-sync!
|
|
} else demux->synced=0;
|
|
} // else
|
|
if(demux->synced==2){
|
|
ret=demux_mpg_read_packet(demux,head);
|
|
if(!ret)
|
|
if(--max_packs==0){
|
|
demux->stream->eof=1;
|
|
printf("demux: file doesn't contain the selected audio or video stream\n");
|
|
return 0;
|
|
}
|
|
} else {
|
|
if(head>=0x100 && head<0x1B0){
|
|
if(head==0x100) ++num_elementary_packets100; else
|
|
if(head==0x101) ++num_elementary_packets101;
|
|
if(verbose>=3) printf("Opps... elementary video packet found: %03X\n",head);
|
|
} else
|
|
if(head>=0x1C0 && head<0x1F0){
|
|
++num_elementary_packetsPES;
|
|
if(verbose>=3) printf("Opps... PES packet found: %03X\n",head);
|
|
} else
|
|
if(head==0x1B6) ++num_elementary_packets1B6;
|
|
#if 1
|
|
if( ( (num_elementary_packets100>50 && num_elementary_packets101>50) ||
|
|
(num_elementary_packetsPES>50) ) && skipped>4000000){
|
|
if(verbose) printf("sync_mpeg_ps: seems to be ES/PES stream...\n");
|
|
demux->stream->eof=1;
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
} while(ret!=1);
|
|
if(verbose>=2) printf("demux: %d bad bytes skipped\n",skipped);
|
|
if(demux->stream->eof){
|
|
if(verbose>=2) printf("MPEG Stream reached EOF\n");
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|