// .asf fileformat docs from http://divx.euro.ru typedef struct __attribute__((packed)) { unsigned char guid[16]; unsigned long long size; } ASF_obj_header_t; typedef struct __attribute__((packed)) { ASF_obj_header_t objh; unsigned int cno; // number of subchunks unsigned char v1; // unknown (0x01) unsigned char v2; // unknown (0x02) } ASF_header_t; typedef struct __attribute__((packed)) { unsigned char client[16]; // Client GUID unsigned long long file_size; unsigned long long creat_time; //File creation time FILETIME 8 unsigned long long packets; //Number of packets UINT64 8 unsigned long long end_timestamp; //Timestamp of the end position UINT64 8 unsigned long long duration; //Duration of the playback UINT64 8 unsigned long start_timestamp; //Timestamp of the start position UINT32 4 unsigned long unk1; //Unknown, maybe reserved ( usually contains 0 ) UINT32 4 unsigned long flags; //Unknown, maybe flags ( usually contains 2 ) UINT32 4 unsigned long packetsize; //Size of packet, in bytes UINT32 4 unsigned long packetsize2; //Size of packet ( confirm ) UINT32 4 unsigned long frame_size; //Size of uncompressed video frame UINT32 4 } ASF_file_header_t; typedef struct __attribute__((packed)) { unsigned char type[16]; // Stream type (audio/video) GUID 16 unsigned char concealment[16]; // Audio error concealment type GUID 16 unsigned long long unk1; // Unknown, maybe reserved ( usually contains 0 ) UINT64 8 unsigned long type_size; //Total size of type-specific data UINT32 4 unsigned long stream_size; //Size of stream-specific data UINT32 4 unsigned short stream_no; //Stream number UINT16 2 unsigned long unk2; //Unknown UINT32 4 } ASF_stream_header_t; ASF_header_t asfh; ASF_obj_header_t objh; ASF_file_header_t fileh; ASF_stream_header_t streamh; unsigned char* asf_packet=NULL; //int asf_video_id=-1; int asf_scrambling_h=1; int asf_scrambling_w=1; int asf_scrambling_b=1; int i; 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){ // printf("descrambling! (w=%d b=%d)\n",w,asf_scrambling_b); //i+=asf_scrambling_h*asf_scrambling_w; for(x=0;xstream,(char*) &asfh,sizeof(asfh)); // header obj // for(i=0;i<16;i++) printf(" %02X",temp[i]);printf("\n"); // for(i=0;i<16;i++) printf(" %02X",asfhdrguid[i]);printf("\n"); if(memcmp(asfhdrguid,asfh.objh.guid,16)){ if(verbose) printf("ASF_check: not ASF guid!\n"); return 0; // not ASF guid } if(asfh.cno>256){ if(verbose) printf("ASF_check: invalid subchunks_no %d\n",(int) asfh.cno); return 0; // invalid header??? } return 1; } int read_asf_header(){ unsigned char buffer[512]; #if 1 printf("ASF file! (subchunks: %d)\n",asfh.cno); while(!stream_eof(demuxer->stream)){ int pos,endpos; pos=stream_tell(demuxer->stream); stream_read(demuxer->stream,(char*) &objh,sizeof(objh)); if(stream_eof(demuxer->stream)) break; // EOF endpos=pos+objh.size; // for(i=0;i<16;i++) printf("%02X ",objh.guid[i]); printf("0x%08X [%s] %d\n",pos, asf_chunk_type(objh.guid),(int) objh.size); switch(*((unsigned int*)&objh.guid)){ case 0xB7DC0791: // guid_stream_header stream_read(demuxer->stream,(char*) &streamh,sizeof(streamh)); printf("stream type: %s\n",asf_chunk_type(streamh.type)); printf("stream concealment: %s\n",asf_chunk_type(streamh.concealment)); printf("type: %d bytes, stream: %d bytes ID: %d\n",(int)streamh.type_size,(int)streamh.stream_size,(int)streamh.stream_no); printf("unk1: %lX unk2: %X\n",streamh.unk1,streamh.unk2); printf("FILEPOS=0x%X\n",stream_tell(demuxer->stream)); // type-specific data: stream_read(demuxer->stream,(char*) buffer,streamh.type_size); switch(*((unsigned int*)&streamh.type)){ case 0xF8699E40: // guid_audio_stream memcpy(avi_header.wf_ext,buffer,streamh.type_size<64?streamh.type_size:64); if(verbose>=1) print_wave_header((WAVEFORMATEX*)buffer); if((*((unsigned int*)&streamh.concealment))==0xbfc3cd50){ stream_read(demuxer->stream,(char*) buffer,streamh.stream_size); asf_scrambling_h=buffer[0]; asf_scrambling_w=(buffer[2]<<8)|buffer[1]; asf_scrambling_b=(buffer[4]<<8)|buffer[3]; asf_scrambling_w/=asf_scrambling_b; } else { asf_scrambling_b=asf_scrambling_h=asf_scrambling_w=1; } printf("ASF audio scrambling: %d x %d x %d\n",asf_scrambling_h,asf_scrambling_w,asf_scrambling_b); if(demuxer->audio->id==-1) demuxer->audio->id=streamh.stream_no & 0x7F; break; case 0xBC19EFC0: // guid_video_stream memcpy(&avi_header.bih,&buffer[4+4+1+2],sizeof(BITMAPINFOHEADER)); if(verbose>=1) print_video_header((BITMAPINFOHEADER*)&buffer[4+4+1+2]); //asf_video_id=streamh.stream_no & 0x7F; if(demuxer->video->id==-1) demuxer->video->id=streamh.stream_no & 0x7F; break; } // stream-specific data: // stream_read(demuxer->stream,(char*) buffer,streamh.stream_size); break; // case 0xD6E229D1: return "guid_header_2_0"; case 0x8CABDCA1: // guid_file_header stream_read(demuxer->stream,(char*) &fileh,sizeof(fileh)); printf("packets: %d flags: %d pack_size: %d frame_size: %d\n",(int)fileh.packets,(int)fileh.flags,(int)fileh.packetsize,(int)fileh.frame_size); asf_packet=malloc(fileh.packetsize); // !!! break; case 0x75b22636: // guid_data_chunk avi_header.movi_start=stream_tell(demuxer->stream)+26; avi_header.movi_end=endpos; if(verbose>=1) printf("Found movie at 0x%X - 0x%X\n",avi_header.movi_start,avi_header.movi_end); break; // case 0x33000890: return "guid_index_chunk"; } // switch GUID if(!stream_seek(demuxer->stream,endpos)) break; } // while EOF #if 0 if(verbose){ printf("ASF duration: %d\n",(int)fileh.duration); printf("ASF start pts: %d\n",(int)fileh.start_timestamp); printf("ASF end pts: %d\n",(int)fileh.end_timestamp); } #endif #endif return 1; }