mirror of
https://github.com/mpv-player/mpv
synced 2024-12-09 16:36:15 +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
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "config.h"
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#include "mp_msg.h"
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#include "help_mp.h"
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#include "stream.h"
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#include "asf.h"
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#include "demuxer.h"
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/*
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* Load 16/32-bit values in little endian byte order
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* from an unaligned address
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*/
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#ifdef ARCH_X86
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#define LOAD_LE32(p) (*(unsigned int*)(p))
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#define LOAD_LE16(p) (*(unsigned short*)(p))
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#else
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#define LOAD_LE32(p) (((unsigned char*)(p))[0] | \
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((unsigned char*)(p))[1]<< 8 | \
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((unsigned char*)(p))[2]<<16 | \
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((unsigned char*)(p))[3]<<24 )
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#define LOAD_LE16(p) (((unsigned char*)(p))[0] | \
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((unsigned char*)(p))[1]<<8)
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#endif
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// defined at asfheader.c:
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extern unsigned char* asf_packet;
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extern int asf_scrambling_h;
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extern int asf_scrambling_w;
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extern int asf_scrambling_b;
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extern int asf_packetsize;
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extern double asf_packetrate;
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extern int asf_movielength;
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// based on asf file-format doc by Eugene [http://divx.euro.ru]
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static void asf_descrambling(unsigned char *src,int len){
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unsigned char *dst=malloc(len);
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unsigned char *s2=src;
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int i=0,x,y;
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while(len-i>=asf_scrambling_h*asf_scrambling_w*asf_scrambling_b){
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// mp_msg(MSGT_DEMUX,MSGL_DBG4,"descrambling! (w=%d b=%d)\n",w,asf_scrambling_b);
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//i+=asf_scrambling_h*asf_scrambling_w;
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for(x=0;x<asf_scrambling_w;x++)
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for(y=0;y<asf_scrambling_h;y++){
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memcpy(dst+i,s2+(y*asf_scrambling_w+x)*asf_scrambling_b,asf_scrambling_b);
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i+=asf_scrambling_b;
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}
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s2+=asf_scrambling_h*asf_scrambling_w*asf_scrambling_b;
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}
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//if(i<len) memcpy(dst+i,src+i,len-i);
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memcpy(src,dst,i);
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free(dst);
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}
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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){
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demux_stream_t *ds=NULL;
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mp_dbg(MSGT_DEMUX,MSGL_DBG4,"demux_asf.read_packet: id=%d seq=%d len=%d\n",id,seq,len);
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if(demux->video->id==-1)
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if(demux->v_streams[id])
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demux->video->id=id;
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if(demux->audio->id==-1)
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if(demux->a_streams[id])
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demux->audio->id=id;
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if(id==demux->audio->id){
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// audio
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ds=demux->audio;
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if(!ds->sh){
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ds->sh=demux->a_streams[id];
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mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected ASF audio ID = %d\n",ds->id);
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}
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} else
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if(id==demux->video->id){
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// video
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ds=demux->video;
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if(!ds->sh){
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ds->sh=demux->v_streams[id];
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mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected ASF video ID = %d\n",ds->id);
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}
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}
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if(ds){
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if(ds->asf_packet){
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if(ds->asf_seq!=seq){
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// closed segment, finalize packet:
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if(ds==demux->audio)
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if(asf_scrambling_h>1 && asf_scrambling_w>1)
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asf_descrambling(ds->asf_packet->buffer,ds->asf_packet->len);
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ds_add_packet(ds,ds->asf_packet);
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ds->asf_packet=NULL;
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} else {
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// append data to it!
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demux_packet_t* dp=ds->asf_packet;
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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);
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dp->buffer=realloc(dp->buffer,dp->len+len);
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memcpy(dp->buffer+dp->len,data,len);
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mp_dbg(MSGT_DEMUX,MSGL_DBG4,"data appended! %d+%d\n",dp->len,len);
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dp->len+=len;
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// we are ready now.
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return 1;
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}
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}
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// create new packet:
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{ demux_packet_t* dp;
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if(offs>0){
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mp_msg(MSGT_DEMUX,MSGL_V,"warning! broken fragment, %d bytes missing \n",offs);
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return 0;
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}
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dp=new_demux_packet(len);
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memcpy(dp->buffer,data,len);
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dp->pts=time*0.001f;
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dp->flags=keyframe;
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// if(ds==demux->video) printf("ASF time: %8d dur: %5d \n",time,dur);
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dp->pos=demux->filepos;
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ds->asf_packet=dp;
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ds->asf_seq=seq;
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// we are ready now.
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return 1;
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}
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}
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return 0;
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}
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//static int num_elementary_packets100=0;
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//static int num_elementary_packets101=0;
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// return value:
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// 0 = EOF or no stream found
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// 1 = successfully read a packet
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int demux_asf_fill_buffer(demuxer_t *demux){
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demux->filepos=stream_tell(demux->stream);
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// Brodcast stream have movi_start==movi_end
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// Better test ?
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if((demux->movi_start < demux->movi_end) && (demux->filepos>=demux->movi_end)){
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demux->stream->eof=1;
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return 0;
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}
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stream_read(demux->stream,asf_packet,asf_packetsize);
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if(demux->stream->eof) return 0; // EOF
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{
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unsigned char* p=asf_packet;
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unsigned char* p_end=asf_packet+asf_packetsize;
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unsigned char flags=p[0];
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unsigned char segtype=p[1];
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int padding;
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int plen;
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int sequence;
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unsigned long time=0;
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unsigned short duration=0;
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int segs=1;
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unsigned char segsizetype=0x80;
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int seg=-1;
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if(verbose>1){
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int i;
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for(i=0;i<16;i++) printf(" %02X",asf_packet[i]);
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printf("\n");
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}
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// skip ECC data if present by testing bit 7 of flags
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// 1xxxbbbb -> ecc data present, skip bbbb byte(s)
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// 0xxxxxxx -> payload parsing info starts
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if (flags & 0x80)
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{
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p += (flags & 0x0f)+1;
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flags = p[0];
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segtype = p[1];
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}
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//if(segtype!=0x5d) printf("Warning! packet[4] != 0x5d \n");
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p+=2; // skip flags & segtype
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// Read packet size (plen):
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switch((flags>>5)&3){
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case 3: plen=LOAD_LE32(p);p+=4;break; // dword
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case 2: plen=LOAD_LE16(p);p+=2;break; // word
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case 1: plen=p[0];p++;break; // byte
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default: plen=0;
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//plen==0 is handled later
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//mp_msg(MSGT_DEMUX,MSGL_V,"Invalid plen type! assuming plen=0\n");
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}
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// Read sequence:
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switch((flags>>1)&3){
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case 3: sequence=LOAD_LE32(p);p+=4;break; // dword
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case 2: sequence=LOAD_LE16(p);p+=2;break; // word
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case 1: sequence=p[0];p++;break; // byte
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default: sequence=0;
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}
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// Read padding size (padding):
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switch((flags>>3)&3){
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case 3: padding=LOAD_LE32(p);p+=4;break; // dword
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case 2: padding=LOAD_LE16(p);p+=2;break; // word
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case 1: padding=p[0];p++;break; // byte
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default: padding=0;
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}
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if(((flags>>5)&3)!=0){
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// Explicit (absoulte) packet size
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mp_dbg(MSGT_DEMUX,MSGL_DBG2,"Explicit packet size specified: %d \n",plen);
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if(plen>asf_packetsize) mp_msg(MSGT_DEMUX,MSGL_V,"Warning! plen>packetsize! (%d>%d) \n",plen,asf_packetsize);
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} else {
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// Padding (relative) size
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plen=asf_packetsize-padding;
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}
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// Read time & duration:
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time = LOAD_LE32(p); p+=4;
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duration = LOAD_LE16(p); p+=2;
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// Read payload flags:
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if(flags&1){
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// multiple sub-packets
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segsizetype=p[0]>>6;
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segs=p[0] & 0x3F;
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++p;
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}
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mp_dbg(MSGT_DEMUX,MSGL_DBG4,"%08X: flag=%02X segs=%d seq=%d plen=%d pad=%d time=%ld dur=%d\n",
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demux->filepos,flags,segs,sequence,plen,padding,time,duration);
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for(seg=0;seg<segs;seg++){
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//ASF_segmhdr_t* sh;
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unsigned char streamno;
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unsigned int seq;
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unsigned int x; // offset or timestamp
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unsigned int rlen;
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//
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int len;
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unsigned int time2=0;
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int keyframe=0;
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if(p>=p_end) mp_msg(MSGT_DEMUX,MSGL_V,"Warning! invalid packet 1, sig11 coming soon...\n");
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if(verbose>1){
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int i;
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printf("seg %d:",seg);
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for(i=0;i<16;i++) printf(" %02X",p[i]);
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printf("\n");
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}
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streamno=p[0]&0x7F;
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if(p[0]&0x80) keyframe=1;
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p++;
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// Read media object number (seq):
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switch((segtype>>4)&3){
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case 3: seq=LOAD_LE32(p);p+=4;break; // dword
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case 2: seq=LOAD_LE16(p);p+=2;break; // word
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case 1: seq=p[0];p++;break; // byte
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default: seq=0;
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}
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// Read offset or timestamp:
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switch((segtype>>2)&3){
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case 3: x=LOAD_LE32(p);p+=4;break; // dword
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case 2: x=LOAD_LE16(p);p+=2;break; // word
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case 1: x=p[0];p++;break; // byte
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default: x=0;
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}
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// Read replic.data len:
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switch((segtype)&3){
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case 3: rlen=LOAD_LE32(p);p+=4;break; // dword
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case 2: rlen=LOAD_LE16(p);p+=2;break; // word
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case 1: rlen=p[0];p++;break; // byte
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default: rlen=0;
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}
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// printf("### rlen=%d \n",rlen);
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switch(rlen){
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case 0x01: // 1 = special, means grouping
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//printf("grouping: %02X \n",p[0]);
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++p; // skip PTS delta
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break;
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default:
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if(rlen>=8){
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p+=4; // skip object size
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time2=LOAD_LE32(p); // read PTS
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p+=rlen-4;
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} else {
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mp_msg(MSGT_DEMUX,MSGL_V,"unknown segment type (rlen): 0x%02X \n",rlen);
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time2=0; // unknown
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p+=rlen;
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}
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}
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if(flags&1){
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// multiple segments
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switch(segsizetype){
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case 3: len=LOAD_LE32(p);p+=4;break; // dword
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case 2: len=LOAD_LE16(p);p+=2;break; // word
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case 1: len=p[0];p++;break; // byte
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default: len=plen-(p-asf_packet); // ???
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}
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} else {
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// single segment
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len=plen-(p-asf_packet);
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}
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if(len<0 || (p+len)>p_end){
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mp_msg(MSGT_DEMUX,MSGL_V,"ASF_parser: warning! segment len=%d\n",len);
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}
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mp_dbg(MSGT_DEMUX,MSGL_DBG4," seg #%d: streamno=%d seq=%d type=%02X len=%d\n",seg,streamno,seq,rlen,len);
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switch(rlen){
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case 0x01:
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// GROUPING:
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//printf("ASF_parser: warning! grouping (flag=1) not yet supported!\n",len);
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//printf(" total: %d \n",len);
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while(len>0){
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int len2=p[0];
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p++;
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//printf(" group part: %d bytes\n",len2);
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demux_asf_read_packet(demux,p,len2,streamno,seq,x,duration,-1,keyframe);
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p+=len2;
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len-=len2+1;
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++seq;
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}
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if(len!=0){
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mp_msg(MSGT_DEMUX,MSGL_V,"ASF_parser: warning! groups total != len\n");
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}
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break;
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default:
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// NO GROUPING:
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//printf("fragment offset: %d \n",sh->x);
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demux_asf_read_packet(demux,p,len,streamno,seq,time2,duration,x,keyframe);
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p+=len;
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break;
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}
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} // for segs
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return 1; // success
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}
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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]);
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return 0;
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}
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#include "stheader.h"
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extern void resync_audio_stream(sh_audio_t *sh_audio);
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extern void skip_audio_frame(sh_audio_t *sh_audio);
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void demux_seek_asf(demuxer_t *demuxer,float rel_seek_secs,int flags){
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demux_stream_t *d_audio=demuxer->audio;
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demux_stream_t *d_video=demuxer->video;
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sh_audio_t *sh_audio=d_audio->sh;
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// sh_video_t *sh_video=d_video->sh;
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//FIXME: OFF_T - didn't test ASF case yet (don't have a large asf...)
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//FIXME: reports good or bad to steve@daviesfam.org please
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//================= seek in ASF ==========================
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float p_rate=asf_packetrate; // packets / sec
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off_t rel_seek_packs=(flags&2)? // FIXME: int may be enough?
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(rel_seek_secs*(demuxer->movi_end-demuxer->movi_start)/asf_packetsize):
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(rel_seek_secs*p_rate);
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off_t rel_seek_bytes=rel_seek_packs*asf_packetsize;
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off_t newpos;
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//printf("ASF: packs: %d duration: %d \n",(int)fileh.packets,*((int*)&fileh.duration));
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// printf("ASF_seek: %d secs -> %d packs -> %d bytes \n",
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// rel_seek_secs,rel_seek_packs,rel_seek_bytes);
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newpos=((flags&1)?demuxer->movi_start:demuxer->filepos)+rel_seek_bytes;
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if(newpos<0 || newpos<demuxer->movi_start) newpos=demuxer->movi_start;
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// printf("\r -- asf: newpos=%d -- \n",newpos);
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stream_seek(demuxer->stream,newpos);
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if (d_video->id >= 0)
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ds_fill_buffer(d_video);
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if(sh_audio){
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ds_fill_buffer(d_audio);
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resync_audio_stream(sh_audio);
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}
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if (d_video->id < 0)
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sh_audio->delay = d_audio->pts;
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else
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while(1){
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if(sh_audio && !d_audio->eof){
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float a_pts=d_audio->pts;
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a_pts+=(ds_tell_pts(d_audio)-sh_audio->a_in_buffer_len)/(float)sh_audio->i_bps;
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// sync audio:
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if (d_video->pts > a_pts){
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skip_audio_frame(sh_audio);
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// if(!ds_fill_buffer(d_audio)) sh_audio=NULL; // skip audio. EOF?
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continue;
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}
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}
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if(d_video->flags&1) break; // found a keyframe!
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if(!ds_fill_buffer(d_video)) break; // skip frame. EOF?
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}
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}
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int demux_asf_control(demuxer_t *demuxer,int cmd, void *arg){
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/* demux_stream_t *d_audio=demuxer->audio;
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demux_stream_t *d_video=demuxer->video;
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sh_audio_t *sh_audio=d_audio->sh;
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sh_video_t *sh_video=d_video->sh;
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*/
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switch(cmd) {
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case DEMUXER_CTRL_GET_TIME_LENGTH:
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*((unsigned long *)arg)=(unsigned long)(asf_movielength);
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return DEMUXER_CTRL_OK;
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case DEMUXER_CTRL_GET_PERCENT_POS:
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return DEMUXER_CTRL_DONTKNOW;
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default:
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return DEMUXER_CTRL_NOTIMPL;
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}
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}
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