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author | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2001-10-20 18:49:08 +0000 |
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committer | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2001-10-20 18:49:08 +0000 |
commit | 881e5d0783d66de0d3efe4b633aa413a277c5b18 (patch) | |
tree | 998f3cdd340f82a73f54b1cdc4e22c19dabff4ad /libmpdemux/demux_asf.c | |
parent | daab5f2480c62bbe684e09e0ae979958b447124b (diff) | |
download | mpv-881e5d0783d66de0d3efe4b633aa413a277c5b18.tar.bz2 mpv-881e5d0783d66de0d3efe4b633aa413a277c5b18.tar.xz |
libdemuxer...
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@2311 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libmpdemux/demux_asf.c')
-rw-r--r-- | libmpdemux/demux_asf.c | 367 |
1 files changed, 367 insertions, 0 deletions
diff --git a/libmpdemux/demux_asf.c b/libmpdemux/demux_asf.c new file mode 100644 index 0000000000..94787171cb --- /dev/null +++ b/libmpdemux/demux_asf.c @@ -0,0 +1,367 @@ +// 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; + + +// 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); + if(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 + + if(asf_packet[0]==0x82){ + unsigned char flags=asf_packet[3]; + unsigned char segtype=asf_packet[4]; + unsigned char* p=&asf_packet[5]; + unsigned char* p_end=p+asf_packetsize; + unsigned long time; + unsigned short duration; + int segs=1; + unsigned char segsizetype=0x80; + int seg; + int padding=0; + int plen; + + if(verbose>1){ + int i; + for(i=0;i<16;i++) printf(" %02X",asf_packet[i]); + printf("\n"); + } + + //if(segtype!=0x5d) printf("Warning! packet[4] != 0x5d \n"); + + // Calculate packet size (plen): + if(flags&0x40){ + // Explicit (absoulte) packet size + plen=LOAD_LE16(p); p+=2; + 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); + if(flags&(8|16)){ + padding=p[0];p++; + if(flags&16){ padding|=p[0]<<8; p++;} + mp_msg(MSGT_DEMUX,MSGL_V,"Warning! explicit=%d padding=%d \n",plen,asf_packetsize-padding); + } + } else { + // Padding (relative) size + if(flags&8){ + padding=p[0];++p; + } else + if(flags&16){ + padding=LOAD_LE16(p);p+=2; + } + plen=asf_packetsize-padding; + } + + time = LOAD_LE32(p); p+=4; + duration = LOAD_LE16(p); p+=2; + if(flags&1){ + segsizetype=p[0] & 0xC0; + segs=p[0] & 0x3F; + ++p; + } + mp_dbg(MSGT_DEMUX,MSGL_DBG4,"%08X: flag=%02X segs=%d pad=%d time=%ld dur=%d\n", + demux->filepos,flags,segs,padding,time,duration); + for(seg=0;seg<segs;seg++){ + //ASF_segmhdr_t* sh; + unsigned char streamno; + unsigned char seq; + int len; + unsigned long x; + unsigned char type; + unsigned long time2; + 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; + seq=p[1]; + p+=2; + + switch(segtype){ + case 0x55: + x=*((unsigned char*)p); + p++; + break; + case 0x59: + x=LOAD_LE16(p); + p+=2; + break; + case 0x5D: + x=LOAD_LE32(p); + p+=4; + break; + default: + mp_msg(MSGT_DEMUX,MSGL_V,"Warning! unknown segtype == 0x%2X \n",segtype); + x=0; + } + + type=p[0]; p++; // 0x01: grouping 0x08: single + + switch(type){ + case 0x01: + //printf("grouping: %02X \n",p[0]); + ++p; // skip unknown byte + break; + case 0x08: + //printf("!!! obj_length = %d\n",*((unsigned long*)p)); + p+=4; + time2=LOAD_LE32(p);p+=4; + break; + default: + mp_msg(MSGT_DEMUX,MSGL_V,"unknown segment type: 0x%02X \n",type); + } + + if(flags&1){ + // multiple segments + if(segsizetype==0x40){ + len=*((unsigned char*)p);p++; // 1 byte + } else { + len=LOAD_LE16(p);p+=2; // 2 byte + } + } 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,type,len); + + switch(type){ + 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; + } + if(len!=0){ + mp_msg(MSGT_DEMUX,MSGL_V,"ASF_parser: warning! groups total != len\n"); + } + break; + case 0x08: + // 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 "wine/mmreg.h" +#include "wine/avifmt.h" +#include "wine/vfw.h" + +#include "codec-cfg.h" +#include "stheader.h" + + +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=10; // 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); + + ds_fill_buffer(d_video); + if(sh_audio){ + ds_fill_buffer(d_audio); + resync_audio_stream(sh_audio); + } + + 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? + } + + +} + |