mirror of
https://github.com/mpv-player/mpv
synced 2024-12-25 00:02:13 +00:00
d147077c21
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14503 b3059339-0415-0410-9bf9-f77b7e298cf2
432 lines
13 KiB
C
432 lines
13 KiB
C
// ASF file parser for DEMUXER v0.3 by A'rpi/ESP-team
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "config.h"
|
|
#include "mp_msg.h"
|
|
#include "help_mp.h"
|
|
|
|
#include "stream.h"
|
|
#include "asf.h"
|
|
#include "demuxer.h"
|
|
|
|
|
|
/*
|
|
* Load 16/32-bit values in little endian byte order
|
|
* from an unaligned address
|
|
*/
|
|
#ifdef ARCH_X86
|
|
#define LOAD_LE32(p) (*(unsigned int*)(p))
|
|
#define LOAD_LE16(p) (*(unsigned short*)(p))
|
|
#else
|
|
#define LOAD_LE32(p) (((unsigned char*)(p))[0] | \
|
|
((unsigned char*)(p))[1]<< 8 | \
|
|
((unsigned char*)(p))[2]<<16 | \
|
|
((unsigned char*)(p))[3]<<24 )
|
|
#define LOAD_LE16(p) (((unsigned char*)(p))[0] | \
|
|
((unsigned char*)(p))[1]<<8)
|
|
#endif
|
|
|
|
// defined at asfheader.c:
|
|
extern unsigned char* asf_packet;
|
|
extern int asf_scrambling_h;
|
|
extern int asf_scrambling_w;
|
|
extern int asf_scrambling_b;
|
|
extern int asf_packetsize;
|
|
extern double asf_packetrate;
|
|
extern int asf_movielength;
|
|
|
|
// based on asf file-format doc by Eugene [http://divx.euro.ru]
|
|
|
|
static void asf_descrambling(unsigned char *src,int len){
|
|
unsigned char *dst=malloc(len);
|
|
unsigned char *s2=src;
|
|
int i=0,x,y;
|
|
while(len-i>=asf_scrambling_h*asf_scrambling_w*asf_scrambling_b){
|
|
// mp_msg(MSGT_DEMUX,MSGL_DBG4,"descrambling! (w=%d b=%d)\n",w,asf_scrambling_b);
|
|
//i+=asf_scrambling_h*asf_scrambling_w;
|
|
for(x=0;x<asf_scrambling_w;x++)
|
|
for(y=0;y<asf_scrambling_h;y++){
|
|
memcpy(dst+i,s2+(y*asf_scrambling_w+x)*asf_scrambling_b,asf_scrambling_b);
|
|
i+=asf_scrambling_b;
|
|
}
|
|
s2+=asf_scrambling_h*asf_scrambling_w*asf_scrambling_b;
|
|
}
|
|
//if(i<len) memcpy(dst+i,src+i,len-i);
|
|
memcpy(src,dst,i);
|
|
free(dst);
|
|
}
|
|
|
|
|
|
static int demux_asf_read_packet(demuxer_t *demux,unsigned char *data,int len,int id,int seq,unsigned long time,unsigned short dur,int offs,int keyframe){
|
|
demux_stream_t *ds=NULL;
|
|
|
|
mp_dbg(MSGT_DEMUX,MSGL_DBG4,"demux_asf.read_packet: id=%d seq=%d len=%d\n",id,seq,len);
|
|
|
|
if(demux->video->id==-1)
|
|
if(demux->v_streams[id])
|
|
demux->video->id=id;
|
|
|
|
if(demux->audio->id==-1)
|
|
if(demux->a_streams[id])
|
|
demux->audio->id=id;
|
|
|
|
if(id==demux->audio->id){
|
|
// audio
|
|
ds=demux->audio;
|
|
if(!ds->sh){
|
|
ds->sh=demux->a_streams[id];
|
|
mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected ASF audio ID = %d\n",ds->id);
|
|
}
|
|
} else
|
|
if(id==demux->video->id){
|
|
// video
|
|
ds=demux->video;
|
|
if(!ds->sh){
|
|
ds->sh=demux->v_streams[id];
|
|
mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected ASF video ID = %d\n",ds->id);
|
|
}
|
|
}
|
|
|
|
if(ds){
|
|
if(ds->asf_packet){
|
|
if(ds->asf_seq!=seq){
|
|
// closed segment, finalize packet:
|
|
if(ds==demux->audio)
|
|
if(asf_scrambling_h>1 && asf_scrambling_w>1)
|
|
asf_descrambling(ds->asf_packet->buffer,ds->asf_packet->len);
|
|
ds_add_packet(ds,ds->asf_packet);
|
|
ds->asf_packet=NULL;
|
|
} else {
|
|
// append data to it!
|
|
demux_packet_t* dp=ds->asf_packet;
|
|
if(dp->len!=offs && offs!=-1) mp_msg(MSGT_DEMUX,MSGL_V,"warning! fragment.len=%d BUT next fragment offset=%d \n",dp->len,offs);
|
|
dp->buffer=realloc(dp->buffer,dp->len+len);
|
|
memcpy(dp->buffer+dp->len,data,len);
|
|
mp_dbg(MSGT_DEMUX,MSGL_DBG4,"data appended! %d+%d\n",dp->len,len);
|
|
dp->len+=len;
|
|
// we are ready now.
|
|
return 1;
|
|
}
|
|
}
|
|
// create new packet:
|
|
{ demux_packet_t* dp;
|
|
if(offs>0){
|
|
mp_msg(MSGT_DEMUX,MSGL_V,"warning! broken fragment, %d bytes missing \n",offs);
|
|
return 0;
|
|
}
|
|
dp=new_demux_packet(len);
|
|
memcpy(dp->buffer,data,len);
|
|
dp->pts=time*0.001f;
|
|
dp->flags=keyframe;
|
|
// if(ds==demux->video) printf("ASF time: %8d dur: %5d \n",time,dur);
|
|
dp->pos=demux->filepos;
|
|
ds->asf_packet=dp;
|
|
ds->asf_seq=seq;
|
|
// we are ready now.
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
//static int num_elementary_packets100=0;
|
|
//static int num_elementary_packets101=0;
|
|
|
|
// return value:
|
|
// 0 = EOF or no stream found
|
|
// 1 = successfully read a packet
|
|
int demux_asf_fill_buffer(demuxer_t *demux){
|
|
|
|
demux->filepos=stream_tell(demux->stream);
|
|
// Brodcast stream have movi_start==movi_end
|
|
// Better test ?
|
|
if((demux->movi_start < demux->movi_end) && (demux->filepos>=demux->movi_end)){
|
|
demux->stream->eof=1;
|
|
return 0;
|
|
}
|
|
|
|
stream_read(demux->stream,asf_packet,asf_packetsize);
|
|
if(demux->stream->eof) return 0; // EOF
|
|
|
|
{
|
|
unsigned char* p=asf_packet;
|
|
unsigned char* p_end=asf_packet+asf_packetsize;
|
|
unsigned char flags=p[0];
|
|
unsigned char segtype=p[1];
|
|
int padding;
|
|
int plen;
|
|
int sequence;
|
|
unsigned long time=0;
|
|
unsigned short duration=0;
|
|
|
|
int segs=1;
|
|
unsigned char segsizetype=0x80;
|
|
int seg=-1;
|
|
|
|
if(verbose>1){
|
|
int i;
|
|
for(i=0;i<16;i++) printf(" %02X",asf_packet[i]);
|
|
printf("\n");
|
|
}
|
|
|
|
// skip ECC data if present by testing bit 7 of flags
|
|
// 1xxxbbbb -> ecc data present, skip bbbb byte(s)
|
|
// 0xxxxxxx -> payload parsing info starts
|
|
if (flags & 0x80)
|
|
{
|
|
p += (flags & 0x0f)+1;
|
|
flags = p[0];
|
|
segtype = p[1];
|
|
}
|
|
|
|
//if(segtype!=0x5d) printf("Warning! packet[4] != 0x5d \n");
|
|
|
|
p+=2; // skip flags & segtype
|
|
|
|
// Read packet size (plen):
|
|
switch((flags>>5)&3){
|
|
case 3: plen=LOAD_LE32(p);p+=4;break; // dword
|
|
case 2: plen=LOAD_LE16(p);p+=2;break; // word
|
|
case 1: plen=p[0];p++;break; // byte
|
|
default: plen=0;
|
|
//plen==0 is handled later
|
|
//mp_msg(MSGT_DEMUX,MSGL_V,"Invalid plen type! assuming plen=0\n");
|
|
}
|
|
|
|
// Read sequence:
|
|
switch((flags>>1)&3){
|
|
case 3: sequence=LOAD_LE32(p);p+=4;break; // dword
|
|
case 2: sequence=LOAD_LE16(p);p+=2;break; // word
|
|
case 1: sequence=p[0];p++;break; // byte
|
|
default: sequence=0;
|
|
}
|
|
|
|
// Read padding size (padding):
|
|
switch((flags>>3)&3){
|
|
case 3: padding=LOAD_LE32(p);p+=4;break; // dword
|
|
case 2: padding=LOAD_LE16(p);p+=2;break; // word
|
|
case 1: padding=p[0];p++;break; // byte
|
|
default: padding=0;
|
|
}
|
|
|
|
if(((flags>>5)&3)!=0){
|
|
// Explicit (absoulte) packet size
|
|
mp_dbg(MSGT_DEMUX,MSGL_DBG2,"Explicit packet size specified: %d \n",plen);
|
|
if(plen>asf_packetsize) mp_msg(MSGT_DEMUX,MSGL_V,"Warning! plen>packetsize! (%d>%d) \n",plen,asf_packetsize);
|
|
} else {
|
|
// Padding (relative) size
|
|
plen=asf_packetsize-padding;
|
|
}
|
|
|
|
// Read time & duration:
|
|
time = LOAD_LE32(p); p+=4;
|
|
duration = LOAD_LE16(p); p+=2;
|
|
|
|
// Read payload flags:
|
|
if(flags&1){
|
|
// multiple sub-packets
|
|
segsizetype=p[0]>>6;
|
|
segs=p[0] & 0x3F;
|
|
++p;
|
|
}
|
|
mp_dbg(MSGT_DEMUX,MSGL_DBG4,"%08X: flag=%02X segs=%d seq=%d plen=%d pad=%d time=%ld dur=%d\n",
|
|
demux->filepos,flags,segs,sequence,plen,padding,time,duration);
|
|
|
|
for(seg=0;seg<segs;seg++){
|
|
//ASF_segmhdr_t* sh;
|
|
unsigned char streamno;
|
|
unsigned int seq;
|
|
unsigned int x; // offset or timestamp
|
|
unsigned int rlen;
|
|
//
|
|
int len;
|
|
unsigned int time2=0;
|
|
int keyframe=0;
|
|
|
|
if(p>=p_end) mp_msg(MSGT_DEMUX,MSGL_V,"Warning! invalid packet 1, sig11 coming soon...\n");
|
|
|
|
if(verbose>1){
|
|
int i;
|
|
printf("seg %d:",seg);
|
|
for(i=0;i<16;i++) printf(" %02X",p[i]);
|
|
printf("\n");
|
|
}
|
|
|
|
streamno=p[0]&0x7F;
|
|
if(p[0]&0x80) keyframe=1;
|
|
p++;
|
|
|
|
// Read media object number (seq):
|
|
switch((segtype>>4)&3){
|
|
case 3: seq=LOAD_LE32(p);p+=4;break; // dword
|
|
case 2: seq=LOAD_LE16(p);p+=2;break; // word
|
|
case 1: seq=p[0];p++;break; // byte
|
|
default: seq=0;
|
|
}
|
|
|
|
// Read offset or timestamp:
|
|
switch((segtype>>2)&3){
|
|
case 3: x=LOAD_LE32(p);p+=4;break; // dword
|
|
case 2: x=LOAD_LE16(p);p+=2;break; // word
|
|
case 1: x=p[0];p++;break; // byte
|
|
default: x=0;
|
|
}
|
|
|
|
// Read replic.data len:
|
|
switch((segtype)&3){
|
|
case 3: rlen=LOAD_LE32(p);p+=4;break; // dword
|
|
case 2: rlen=LOAD_LE16(p);p+=2;break; // word
|
|
case 1: rlen=p[0];p++;break; // byte
|
|
default: rlen=0;
|
|
}
|
|
|
|
// printf("### rlen=%d \n",rlen);
|
|
|
|
switch(rlen){
|
|
case 0x01: // 1 = special, means grouping
|
|
//printf("grouping: %02X \n",p[0]);
|
|
++p; // skip PTS delta
|
|
break;
|
|
default:
|
|
if(rlen>=8){
|
|
p+=4; // skip object size
|
|
time2=LOAD_LE32(p); // read PTS
|
|
p+=rlen-4;
|
|
} else {
|
|
mp_msg(MSGT_DEMUX,MSGL_V,"unknown segment type (rlen): 0x%02X \n",rlen);
|
|
time2=0; // unknown
|
|
p+=rlen;
|
|
}
|
|
}
|
|
|
|
if(flags&1){
|
|
// multiple segments
|
|
switch(segsizetype){
|
|
case 3: len=LOAD_LE32(p);p+=4;break; // dword
|
|
case 2: len=LOAD_LE16(p);p+=2;break; // word
|
|
case 1: len=p[0];p++;break; // byte
|
|
default: len=plen-(p-asf_packet); // ???
|
|
}
|
|
} else {
|
|
// single segment
|
|
len=plen-(p-asf_packet);
|
|
}
|
|
if(len<0 || (p+len)>p_end){
|
|
mp_msg(MSGT_DEMUX,MSGL_V,"ASF_parser: warning! segment len=%d\n",len);
|
|
}
|
|
mp_dbg(MSGT_DEMUX,MSGL_DBG4," seg #%d: streamno=%d seq=%d type=%02X len=%d\n",seg,streamno,seq,rlen,len);
|
|
|
|
switch(rlen){
|
|
case 0x01:
|
|
// GROUPING:
|
|
//printf("ASF_parser: warning! grouping (flag=1) not yet supported!\n",len);
|
|
//printf(" total: %d \n",len);
|
|
while(len>0){
|
|
int len2=p[0];
|
|
p++;
|
|
//printf(" group part: %d bytes\n",len2);
|
|
demux_asf_read_packet(demux,p,len2,streamno,seq,x,duration,-1,keyframe);
|
|
p+=len2;
|
|
len-=len2+1;
|
|
++seq;
|
|
}
|
|
if(len!=0){
|
|
mp_msg(MSGT_DEMUX,MSGL_V,"ASF_parser: warning! groups total != len\n");
|
|
}
|
|
break;
|
|
default:
|
|
// NO GROUPING:
|
|
//printf("fragment offset: %d \n",sh->x);
|
|
demux_asf_read_packet(demux,p,len,streamno,seq,time2,duration,x,keyframe);
|
|
p+=len;
|
|
break;
|
|
}
|
|
|
|
} // for segs
|
|
return 1; // success
|
|
}
|
|
|
|
mp_msg(MSGT_DEMUX,MSGL_V,"%08X: UNKNOWN TYPE %02X %02X %02X %02X %02X...\n",demux->filepos,asf_packet[0],asf_packet[1],asf_packet[2],asf_packet[3],asf_packet[4]);
|
|
return 0;
|
|
}
|
|
|
|
#include "stheader.h"
|
|
|
|
extern void resync_audio_stream(sh_audio_t *sh_audio);
|
|
extern void skip_audio_frame(sh_audio_t *sh_audio);
|
|
|
|
void demux_seek_asf(demuxer_t *demuxer,float rel_seek_secs,int flags){
|
|
demux_stream_t *d_audio=demuxer->audio;
|
|
demux_stream_t *d_video=demuxer->video;
|
|
sh_audio_t *sh_audio=d_audio->sh;
|
|
// sh_video_t *sh_video=d_video->sh;
|
|
|
|
//FIXME: OFF_T - didn't test ASF case yet (don't have a large asf...)
|
|
//FIXME: reports good or bad to steve@daviesfam.org please
|
|
|
|
//================= seek in ASF ==========================
|
|
float p_rate=asf_packetrate; // packets / sec
|
|
off_t rel_seek_packs=(flags&2)? // FIXME: int may be enough?
|
|
(rel_seek_secs*(demuxer->movi_end-demuxer->movi_start)/asf_packetsize):
|
|
(rel_seek_secs*p_rate);
|
|
off_t rel_seek_bytes=rel_seek_packs*asf_packetsize;
|
|
off_t newpos;
|
|
//printf("ASF: packs: %d duration: %d \n",(int)fileh.packets,*((int*)&fileh.duration));
|
|
// printf("ASF_seek: %d secs -> %d packs -> %d bytes \n",
|
|
// rel_seek_secs,rel_seek_packs,rel_seek_bytes);
|
|
newpos=((flags&1)?demuxer->movi_start:demuxer->filepos)+rel_seek_bytes;
|
|
if(newpos<0 || newpos<demuxer->movi_start) newpos=demuxer->movi_start;
|
|
// printf("\r -- asf: newpos=%d -- \n",newpos);
|
|
stream_seek(demuxer->stream,newpos);
|
|
|
|
if (d_video->id >= 0)
|
|
ds_fill_buffer(d_video);
|
|
if(sh_audio){
|
|
ds_fill_buffer(d_audio);
|
|
resync_audio_stream(sh_audio);
|
|
}
|
|
|
|
if (d_video->id < 0)
|
|
sh_audio->delay = d_audio->pts;
|
|
else
|
|
while(1){
|
|
if(sh_audio && !d_audio->eof){
|
|
float a_pts=d_audio->pts;
|
|
a_pts+=(ds_tell_pts(d_audio)-sh_audio->a_in_buffer_len)/(float)sh_audio->i_bps;
|
|
// sync audio:
|
|
if (d_video->pts > a_pts){
|
|
skip_audio_frame(sh_audio);
|
|
// if(!ds_fill_buffer(d_audio)) sh_audio=NULL; // skip audio. EOF?
|
|
continue;
|
|
}
|
|
}
|
|
if(d_video->flags&1) break; // found a keyframe!
|
|
if(!ds_fill_buffer(d_video)) break; // skip frame. EOF?
|
|
}
|
|
|
|
|
|
}
|
|
|
|
int demux_asf_control(demuxer_t *demuxer,int cmd, void *arg){
|
|
/* demux_stream_t *d_audio=demuxer->audio;
|
|
demux_stream_t *d_video=demuxer->video;
|
|
sh_audio_t *sh_audio=d_audio->sh;
|
|
sh_video_t *sh_video=d_video->sh;
|
|
*/
|
|
switch(cmd) {
|
|
case DEMUXER_CTRL_GET_TIME_LENGTH:
|
|
*((unsigned long *)arg)=(unsigned long)(asf_movielength);
|
|
return DEMUXER_CTRL_OK;
|
|
|
|
case DEMUXER_CTRL_GET_PERCENT_POS:
|
|
return DEMUXER_CTRL_DONTKNOW;
|
|
|
|
default:
|
|
return DEMUXER_CTRL_NOTIMPL;
|
|
}
|
|
}
|