| Quellcodebibliothek Statistik Leitseite products/Sources/formale Sprachen/C/VLC/modules/demux/avi/ (VLC Media Plyer ©) Datei vom 23.9.2026 mit Größe 107 kB |
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Quelle avi.c Sprache: C |
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/***************************************************************************** * avi.c : AVI file Stream input module for vlc ***************************************************************************** * Copyright (C) 2001-2009 VLC authors and VideoLAN * * Authors: Laurent Aimar <fenrir@via.ecp.fr> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include <assert.h> #include <ctype.h> #include <limits.h> #include <stdint.h> #include <vlc_common.h> #include <vlc_arrays.h> #include <vlc_plugin.h> #include <vlc_demux.h> #include <vlc_input.h> #include <vlc_aout.h> #include <vlc_dialog.h> #include <vlc_meta.h> #include <vlc_codecs.h> #include <vlc_charset.h> #include <vlc_arrays.h> #include "libavi.h" #include "../rawdv.h" #include "bitmapinfoheader.h" #include "../../packetizer/h264_nal.h" #include "../../packetizer/hevc_nal.h" /***************************************************************************** * Module descriptor *****************************************************************************/ #define INTERLEAVE_TEXT N_("Force interleaved method" ) #define INDEX_TEXT N_("Force index creation") #define INDEX_LONGTEXT N_( \ "Recreate a index for the AVI file. Use this if your AVI file is damaged "\ "or incomplete (not seekable)." ) static int Open ( vlc_object_t * ); static void Close( vlc_object_t * ); static const int pi_index[] = {0,1,2,3}; static const char *const ppsz_indexes[] = { N_("Ask for action"), N_("Always fix"), N_("Never fix"), N_("Fix when necessary")}; vlc_module_begin () set_shortname( "AVI" ) set_description( N_("AVI demuxer") ) set_capability( "demux", 212 ) set_subcategory( SUBCAT_INPUT_DEMUX ) add_file_extension("avi") add_bool( "avi-interleaved", false, INTERLEAVE_TEXT, NULL ) add_integer( "avi-index", 0, INDEX_TEXT, INDEX_LONGTEXT ) change_integer_list( pi_index, ppsz_indexes ) set_callbacks( Open, Close ) vlc_module_end () /***************************************************************************** * Local prototypes *****************************************************************************/ static int Control ( demux_t *, int, va_list ); static int Seek ( demux_t *, vlc_tick_t, double, bool ); static int Demux_Seekable ( demux_t * ); static int Demux_UnSeekable( demux_t * ); static char *FromACP( const char *str ) { return FromCharset(vlc_pgettext("GetACP", "CP1252"), str, strlen(str)); } #define IGNORE_ES DATA_ES #define READ_LENGTH VLC_TICK_FROM_MS(25) #define READ_LENGTH_NONINTERLEAVED VLC_TICK_FROM_MS(1500) //#define AVI_DEBUG typedef struct { vlc_fourcc_t i_fourcc; uint64_t i_pos; uint32_t i_size; vlc_fourcc_t i_type; /* only for AVIFOURCC_LIST */ uint8_t i_peek[8]; /* first 8 bytes */ unsigned int i_stream; enum es_format_category_e i_cat; } avi_packet_t; typedef struct { uint64_t i_pos; uint32_t i_flags; uint32_t i_length; uint64_t i_lengthtotal; } avi_entry_t; typedef struct { uint32_t i_size; uint32_t i_max; avi_entry_t *p_entry; } avi_index_t; static void avi_index_Init( avi_index_t * ); static void avi_index_Clean( avi_index_t * ); static int64_t avi_index_Append( avi_index_t *, uint64_t *, avi_entry_t * ); typedef struct { bool b_activated; bool b_eof; unsigned int i_rate; /* for audio & video */ unsigned int i_scale;/* for audio & video */ unsigned int i_samplesize; struct bitmapinfoheader_properties bihprops; bool is_qnap; es_format_t fmt; es_out_id_t *p_es; int i_next_block_flags; int i_dv_audio_rate; es_out_id_t *p_es_dv_audio; /* SPU specific */ vlc_tick_t i_last_embedded_endtime; vlc_tick_t i_next_embedded_time; /* Avi Index */ avi_index_t idx; unsigned int i_idxposc; /* numero of chunk */ unsigned int i_idxposb; /* byte in the current chunk */ /* For VBR audio only */ unsigned int i_blockno; unsigned int i_blocksize; struct { bool b_ok; int64_t i_toread; int64_t i_posf; /* where we will read : if i_idxposb == 0 : beginning of chunk (+8 to access data) else : point on data directly */ } demuxctx; } avi_track_t; typedef struct { vlc_tick_t i_time; vlc_tick_t i_length; bool b_interleaved; bool b_seekable; bool b_fastseekable; bool b_indexloaded; /* if we read indexes from end of file before starting */ vlc_tick_t i_read_increment; uint32_t i_avih_flags; avi_chunk_t ck_root; bool b_odml; uint64_t i_movi_begin; uint64_t i_movi_lastchunk_pos; /* XXX position of last valid chunk */ /* number of streams and information */ unsigned int i_track; avi_track_t **track; /* meta */ vlc_meta_t *meta; unsigned int updates; unsigned int i_attachment; input_attachment_t **attachment; } demux_sys_t; #define __EVEN(x) (((x) & 1) ? (x) + 1 : (x)) static int64_t AVI_PTSToChunk( avi_track_t *, vlc_tick_t i_pts ); static int64_t AVI_PTSToByte ( avi_track_t *, vlc_tick_t i_pts ); static vlc_tick_t AVI_GetDPTS ( avi_track_t *, int64_t i_count ); static vlc_tick_t AVI_GetPTS ( avi_track_t * ); static int AVI_StreamChunkFind( demux_t *, avi_track_t * ); static int AVI_StreamChunkSet ( demux_t *, avi_track_t *, unsigned int i_ck ); static int AVI_StreamBytesSet ( demux_t *, avi_track_t *, uint64_t i_byte ); vlc_fourcc_t AVI_FourccGetCodec( unsigned int i_cat, vlc_fourcc_t ); static int AVI_GetKeyFlag ( const avi_track_t *, const uint8_t * ); static int AVI_PacketGetHeader( demux_t *, avi_packet_t *p_pk ); static int AVI_PacketNext ( demux_t * ); static int AVI_PacketSearch ( demux_t * ); static void AVI_IndexLoad ( demux_t * ); static void AVI_IndexCreate ( demux_t * ); static void AVI_ExtractSubtitle( demux_t *, unsigned int i_stream, avi_chunk_list_t *, avi static avi_track_t * AVI_GetVideoTrackForXsub( demux_sys_t * ); static int AVI_SeekSubtitleTrack( demux_sys_t *, avi_track_t * ); static void AVI_DvHandleAudio( demux_t *, avi_track_t *, block_t * ); static vlc_tick_t AVI_MovieGetLength( demux_t * ); static void AVI_MetaLoad( demux_t *, avi_chunk_list_t *p_riff, avi_chunk_avih_t *p_avih ) /***************************************************************************** * Stream management *****************************************************************************/ static int AVI_TrackSeek ( demux_t *, int, vlc_tick_t ); static bool AVI_TrackStopFinishedStreams( demux_t *); /* Remarks: - For VBR mp3 stream: count blocks by rounded-up chunksizes instead of chunks we need full emulation of dshow avi demuxer bugs :( fixes silly nandub-style a-v delaying in avi with vbr mp3... (from mplayer 2002/08/02) - to complete.... */ #define QNAP_VIDEO_HEADER_SIZE 56 /* https://github.com/qnap-dev/qnap-qiot-sdks/blob/master/doc/QVRPro/live_stream_ static bool IsQNAPCodec(uint32_t biCompression) { switch (biCompression) { case QNAP_FCC_w264: case QNAP_FCC_q264: case QNAP_FCC_Q264: case QNAP_FCC_wMP4: case QNAP_FCC_qMP4: case QNAP_FCC_QMP4: case QNAP_FCC_wIVG: case QNAP_FCC_qIVG: case QNAP_FCC_QIVG: return true; default: return false; } } #define XSUB_HEADER_SIZE 0x1B static int ExtractXsubSampleInfo( const uint8_t *p_buf, vlc_tick_t *pi_start, vlc_tick_t *pi_end ) { unsigned t[8]; char buffer[XSUB_HEADER_SIZE + 1]; memcpy( buffer, p_buf, XSUB_HEADER_SIZE ); buffer[XSUB_HEADER_SIZE] = '\0'; if( sscanf( buffer, "[%u:%2u:%2u.%3u-%u:%2u:%2u.%3u]", &t[0], &t[1], &t[2], &t[3], &t[4], &t[5], &t[6], &t[7] ) != 8 ) return VLC_EGENERIC; *pi_start = vlc_tick_from_sec( t[0] * 3600 + t[1] * 60 + t[2] ) + VLC_TICK_FROM_MS(t[3]); *pi_end = vlc_tick_from_sec( t[4] * 3600 + t[5] * 60 + t[6] ) + VLC_TICK_FROM_MS(t[7]); return VLC_SUCCESS; } static int AVI_PeekSample( stream_t *s, size_t i_skip, const uint8_t **pp_peek, size_t i_peek ) { ssize_t i_ret = vlc_stream_Peek( s, pp_peek, i_skip + i_peek ); *pp_peek += i_skip; if ( i_ret < 0 || (size_t) i_ret != i_skip + i_peek ) return VLC_EGENERIC; return VLC_SUCCESS; } static vlc_tick_t AVI_GetXsubSampleTimeAt( stream_t *s, uint64_t pos ) { const uint8_t *p_peek; vlc_tick_t i_nzstart, i_nzend; if( vlc_stream_Seek( s, pos ) != VLC_SUCCESS || AVI_PeekSample( s, 8, &p_peek, XSUB_HEADER_SIZE ) || ExtractXsubSampleInfo( p_peek, &i_nzstart, &i_nzend ) ) return VLC_TICK_INVALID; return VLC_TICK_0 + i_nzstart; } /***************************************************************************** * Close: frees unused data *****************************************************************************/ static void Close ( vlc_object_t * p_this ) { demux_t * p_demux = (demux_t *)p_this; demux_sys_t *p_sys = p_demux->p_sys ; for( unsigned int i = 0; i < p_sys->i_track; i++ ) { if( p_sys->track[i] ) { es_format_Clean( &p_sys->track[i]->fmt ); avi_index_Clean( &p_sys->track[i]->idx ); free( p_sys->track[i] ); } } free( p_sys->track ); AVI_ChunkFreeRoot( p_demux->s, &p_sys->ck_root ); if( p_sys->meta ) vlc_meta_Delete( p_sys->meta ); for( unsigned i = 0; i < p_sys->i_attachment; i++) vlc_input_attachment_Release(p_sys->attachment[i]); free(p_sys->attachment); free( p_sys ); } /***************************************************************************** * Open: check file and initializes AVI structures *****************************************************************************/ static int Open( vlc_object_t * p_this ) { demux_t *p_demux = (demux_t *)p_this; demux_sys_t *p_sys; bool b_index = false, b_aborted = false; int i_do_index; avi_chunk_list_t *p_riff; avi_chunk_list_t *p_hdrl, *p_movi; avi_chunk_avih_t *p_avih; unsigned int i_track; unsigned int i_peeker; const uint8_t *p_peek; /* Is it an avi file ? */ if( vlc_stream_Peek( p_demux->s, &p_peek, 200 ) < 200 ) return VLC_EGENERIC; for( i_peeker = 0; i_peeker < 188; i_peeker++ ) { if( !strncmp( (char *)&p_peek[0], "RIFF", 4 ) && !strncmp( (char *)&p_peek[yle='color: green'>8], "AVI ", 4 ) ) break; if( !strncmp( (char *)&p_peek[0], "ON2 ", 4 ) && !strncmp( (char *)&p_peek[le='color: green'>8], "ON2f", 4 ) ) break; p_peek++; } if( i_peeker == 188 ) { return VLC_EGENERIC; } if( i_peeker > 0 && vlc_stream_Read( p_demux->s, NULL, i_peeker ) != i_peeker ) return VLC_EGENERIC; /* Initialize input structures. */ p_sys = p_demux->p_sys = calloc( 1, sizeof(demux_sys_t) ); if( unlikely(!p_sys) ) return VLC_EGENERIC; p_sys->b_odml = false; p_sys->meta = NULL; TAB_INIT(p_sys->i_track, p_sys->track); TAB_INIT(p_sys->i_attachment, p_sys->attachment); vlc_stream_Control( p_demux->s, STREAM_CAN_FASTSEEK, &p_sys->b_fastseekable ); vlc_stream_Control( p_demux->s, STREAM_CAN_SEEK, &p_sys->b_seekable ); p_sys->b_interleaved = var_InheritBool( p_demux, "avi-interleaved" ); if( AVI_ChunkReadRoot( p_demux->s, &p_sys->ck_root ) ) { msg_Err( p_demux, "avi module discarded (invalid file)" ); free(p_sys); return VLC_EGENERIC; } if( AVI_ChunkCount( &p_sys->ck_root, AVIFOURCC_RIFF, true ) > 1 ) { unsigned int i_count = AVI_ChunkCount( &p_sys->ck_root, AVIFOURCC_RIFF, true ); msg_Warn( p_demux, "multiple riff -> OpenDML ?" ); for( unsigned i = 1; i < i_count; i++ ) { avi_chunk_list_t *p_sysx; p_sysx = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, i, true ); if( p_sysx && p_sysx->i_type == AVIFOURCC_AVIX ) { msg_Warn( p_demux, "detected OpenDML file" ); p_sys->b_odml = true; break; } } } p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0, true ); p_hdrl = AVI_ChunkFind( p_riff, AVIFOURCC_hdrl, 0, true ); p_movi = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0, true ); if( !p_movi ) p_movi = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_movi, 0, true ); if( !p_hdrl || !p_movi ) { msg_Err( p_demux, "invalid file: cannot find hdrl or movi chunks" ); goto error; } if( !( p_avih = AVI_ChunkFind( p_hdrl, AVIFOURCC_avih, 0, false ) ) ) { msg_Err( p_demux, "invalid file: cannot find avih chunk" ); goto error; } i_track = AVI_ChunkCount( p_hdrl, AVIFOURCC_strl, true ); if( p_avih->i_streams != i_track ) { msg_Warn( p_demux, "found %d stream but %d are declared", i_track, p_avih->i_streams ); } if( i_track > AVIF_MAX_STREAMS ) { msg_Err( p_demux, "Invalid number of streams %u", i_track ); goto error; } if( i_track == 0 ) { msg_Err( p_demux, "no stream defined!" ); goto error; } /* print information on streams */ msg_Dbg( p_demux, "AVIH: %d stream, flags %s%s%s%s ", i_track, p_avih->i_flags&AVIF_HASINDEX?" HAS_INDEX":"", p_avih->i_flags&AVIF_MUSTUSEINDEX?" MUST_USE_INDEX":"", p_avih->i_flags&AVIF_ISINTERLEAVED?" IS_INTERLEAVED":"", p_avih->i_flags&AVIF_TRUSTCKTYPE?" TRUST_CKTYPE":"" ); p_sys->b_interleaved |= (p_avih->i_flags & AVIF_ISINTERLEAVED); /* Set callbacks */ p_demux->pf_control = Control; if( p_sys->b_fastseekable ) { p_demux->pf_demux = Demux_Seekable; p_sys->i_read_increment = READ_LENGTH; } else if( p_sys->b_seekable ) { p_demux->pf_demux = Demux_Seekable; p_sys->i_read_increment = READ_LENGTH_NONINTERLEAVED; if( !p_sys->b_interleaved ) msg_Warn( p_demux, "Non interleaved content over slow seekable, " "expect bad performance" ); } else { msg_Warn( p_demux, "Non seekable content " ); p_demux->pf_demux = Demux_UnSeekable; p_sys->i_read_increment = READ_LENGTH_NONINTERLEAVED; /* non seekable and non interleaved case ? well... */ if( !p_sys->b_interleaved ) { msg_Warn( p_demux, "Non seekable non interleaved content, " "disabling other tracks" ); i_track = __MIN(i_track, 1); } } AVI_MetaLoad( p_demux, p_riff, p_avih ); p_sys->i_avih_flags = p_avih->i_flags; /* now read info on each stream and create ES */ for( unsigned i = 0 ; i < i_track; i++ ) { avi_track_t *tk = calloc( 1, sizeof( avi_track_t ) ); if( unlikely( !tk ) ) goto error; avi_chunk_list_t *p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i, true ); avi_chunk_strh_t *p_strh = AVI_ChunkFind( p_strl, AVIFOURCC_strh, 0, false ); avi_chunk_STRING_t *p_strn = AVI_ChunkFind( p_strl, AVIFOURCC_strn, 0, false ); avi_chunk_strf_auds_t *p_auds = NULL; avi_chunk_strf_vids_t *p_vids = NULL; tk->b_eof = false; tk->b_activated = true; p_vids = (avi_chunk_strf_vids_t*)AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0, false ); p_auds = (avi_chunk_strf_auds_t*)p_vids; if( p_strl == NULL || p_strh == NULL || p_vids == NULL ) { msg_Warn( p_demux, "stream[%d] incomplete", i ); free( tk ); continue; } tk->i_rate = p_strh->i_rate; tk->i_scale = p_strh->i_scale; tk->i_samplesize = p_strh->i_samplesize; msg_Dbg( p_demux, "stream[%u] rate:%u scale:%u samplesize:%u", i, tk->i_rate, tk->i_scale, tk->i_samplesize ); switch( p_strh->i_type ) { case( AVIFOURCC_auds ): { es_format_Init( &tk->fmt, AUDIO_ES, 0 ); if( p_auds->p_wf->wFormatTag == WAVE_FORMAT_EXTENSIBLE && p_auds->p_wf->cbSize >= sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX) ) { WAVEFORMATEXTENSIBLE *p_wfe = container_of(p_auds->p_wf, WAVEFORMATEXTENSIBLE, Format) tk->fmt.i_codec = AVI_FourccGetCodec( AUDIO_ES, p_wfe->SubFormat.Data1 ); } else tk->fmt.i_codec = AVI_FourccGetCodec( AUDIO_ES, p_auds->p_wf->wFormatTag ); tk->i_blocksize = p_auds->p_wf->nBlockAlign; /* Fix blocksize == 0 and force interleaving PCM chunks samplesize == 0 */ if( tk->i_samplesize == 0 || tk->i_blocksize == 0 ) { vlc_fourcc_t i_codec = vlc_fourcc_GetCodecAudio( tk->fmt.i_codec, p_auds->p_wf->wBitsPerSample ); unsigned bps = aout_BitsPerSample( i_codec ); if( bps > 0 ) /* PCM audio */ { if( tk->i_blocksize == 0 ) tk->i_blocksize = bps * p_auds->p_wf->nChannels / 8; if( tk->i_samplesize == 0 ) tk->i_samplesize = tk->i_blocksize; tk->fmt.b_packetized = true; } else if( tk->i_blocksize == 0 ) { tk->i_blocksize = 1; } } else if( tk->i_samplesize != tk->i_blocksize ) { msg_Warn( p_demux, "track[%u] samplesize=%u and blocksize=%u are not equal." "Using blocksize as a workaround.", i, tk->i_samplesize, tk->i_blocksize ); tk->i_samplesize = tk->i_blocksize; } /* fix VBR decoding */ if( tk->fmt.i_codec == VLC_CODEC_VORBIS || tk->fmt.i_codec == VLC_CODEC_FLAC ) { tk->i_blocksize = 0; } if ( tk->fmt.i_codec == VLC_CODEC_MP4A ) { tk->i_samplesize = 0; /* ADTS/AAC VBR */ } /* Fix broken scale/rate */ if ( tk->fmt.i_codec == VLC_CODEC_ADPCM_IMA_WAV && tk->i_samplesize && tk->i_samplesize > tk->i_rate ) { tk->i_scale = 1017; tk->i_rate = p_auds->p_wf->nSamplesPerSec; } /* From libavformat */ /* Fix broken sample size (which is mp2 num samples / frame) #12722 */ if( tk->fmt.i_codec == VLC_CODEC_MPGA && tk->i_samplesize == 1152 && p_auds->p_wf->nBlockAlign == 1152 ) { p_auds->p_wf->nBlockAlign = tk->i_samplesize = 0; } tk->fmt.audio.i_channels = p_auds->p_wf->nChannels; tk->fmt.audio.i_rate = p_auds->p_wf->nSamplesPerSec; tk->fmt.i_bitrate = p_auds->p_wf->nAvgBytesPerSec*8; tk->fmt.audio.i_blockalign = p_auds->p_wf->nBlockAlign; tk->fmt.audio.i_bitspersample = p_auds->p_wf->wBitsPerSample; tk->fmt.b_packetized = !tk->i_blocksize; avi_chunk_list_t *p_info = AVI_ChunkFind( p_riff, AVIFOURCC_INFO, 0, true ); if( p_info ) { int i_chunk = AVIFOURCC_IAS1 + ((i - 1) << 24); avi_chunk_STRING_t *p_lang = AVI_ChunkFind( p_info, i_chunk, 0, false ); if( p_lang != NULL && p_lang->p_str != NULL ) tk->fmt.psz_language = FromACP( p_lang->p_str ); } msg_Dbg( p_demux, "stream[%u] audio(0x%x - %s) %d channels %dHz %dbits", i, p_auds->p_wf->wFormatTag, vlc_fourcc_GetDescription(AUDIO_ES, tk->fmt.i_codec), p_auds->p_wf->nChannels, p_auds->p_wf->nSamplesPerSec, p_auds->p_wf->wBitsPerSample ); const size_t i_cboff = sizeof(WAVEFORMATEX); const size_t i_incboff = ( p_auds->p_wf->wFormatTag == WAVE_FORMAT_EXTENSIBLE ) ? sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX): 0; if( p_auds->i_chunk_size >= i_cboff + p_auds->p_wf->cbSize && p_auds->p_wf->cbSize > i_incboff ) { int i_extra = p_auds->p_wf->cbSize - i_incboff; tk->fmt.p_extra = malloc( i_extra ); if( unlikely(tk->fmt.p_extra == NULL) ) { es_format_Clean( &tk->fmt ); free( tk ); goto error; } tk->fmt.i_extra = i_extra; memcpy( tk->fmt.p_extra, ((uint8_t *)(&p_auds->p_wf[1])) + i_incboff, i_extra ); } break; } case( AVIFOURCC_vids ): { if( p_vids->p_bih->biCompression == FOURCC_DXSB ) { msg_Dbg( p_demux, "stream[%u] subtitles", i ); es_format_Init( &tk->fmt, SPU_ES, p_vids->p_bih->biCompression ); tk->fmt.subs.spu.i_original_frame_width = p_vids->p_bih->biWidth; tk->fmt.subs.spu.i_original_frame_height = p_vids->p_bih->biHeight; break; } es_format_Init( &tk->fmt, VIDEO_ES, 0 ); if( ParseBitmapInfoHeader( p_vids->p_bih, p_vids->i_chunk_size, &tk->fmt, &tk->bihprops ) != VLC_SUCCESS ) { es_format_Clean( &tk->fmt ); free( tk ); goto error; } if( tk->fmt.i_codec == VLC_CODEC_MP4V && !strncasecmp( (char*)&p_strh->i_handler, "XVID", 4 ) ) { tk->fmt.i_codec = tk->fmt.i_original_fourcc = FOURCC_XVID; tk->fmt.b_packetized = false; } if( IsQNAPCodec( p_vids->p_bih->biCompression ) ) { tk->is_qnap = true; tk->fmt.b_packetized = false; } if( tk->fmt.i_codec == VLC_CODEC_H264 && tk->fmt.i_extra ) { tk->fmt.i_original_fourcc = VLC_FOURCC('a','v','c','1'); } /* Store original fourcc for SpeedHQ variants so decoder can distinguish between them */ if( tk->fmt.i_codec == VLC_CODEC_SPEEDHQ && tk->fmt.i_original_fourcc == 0 ) { tk->fmt.i_original_fourcc = p_vids->p_bih->biCompression; } tk->i_samplesize = 0; tk->fmt.video.i_frame_rate = tk->i_rate; tk->fmt.video.i_frame_rate_base = tk->i_scale; avi_chunk_vprp_t *p_vprp = AVI_ChunkFind( p_strl, AVIFOURCC_vprp, 0, false ); if( p_vprp ) { uint32_t i_frame_aspect_ratio = p_vprp->i_frame_aspect_ratio; if( p_vprp->i_video_format_token >= 1 && p_vprp->i_video_format_token <= 4 ) i_frame_aspect_ratio = 0x00040003; tk->fmt.video.i_sar_num = ((i_frame_aspect_ratio >> 16) & 0xffff) * tk->fmt.video.i_height; tk->fmt.video.i_sar_den = ((i_frame_aspect_ratio >> 0) & 0xffff) * tk->fmt.video.i_width; } msg_Dbg( p_demux, "stream[%u] video(%4.4s) %"PRIu32"x%"PRIu32" %dbpp %ffps", i, (char*)&p_vids->p_bih->biCompression, p_vids->p_bih->biWidth, (p_vids->p_bih->biHeight <= INT_MAX) ? p_vids->p_bih->biHeight : -1 * p_vids->p_bih->biHeight, p_vids->p_bih->biBitCount, (float)tk->i_rate/(float)tk->i_scale ); break; } case( AVIFOURCC_txts): msg_Dbg( p_demux, "stream[%u] subtitle attachment", i ); AVI_ExtractSubtitle( p_demux, i, p_strl, p_strn ); free( tk ); continue; case( AVIFOURCC_iavs): case( AVIFOURCC_ivas): msg_Dbg( p_demux, "stream[%u] iavs with handler %4.4s", i, (char *)&p_strh->i_handler ); es_format_Init( &tk->fmt, VIDEO_ES, AVI_FourccGetCodec( VIDEO_ES, p_strh->i_handler ) ); tk->i_samplesize = 0; tk->i_dv_audio_rate = tk->fmt.i_codec == VLC_CODEC_DV ? -1 : 0; tk->fmt.video.i_visible_width = tk->fmt.video.i_width = p_avih->i_width; tk->fmt.video.i_visible_height = tk->fmt.video.i_height = p_avih->i_height; break; case( AVIFOURCC_mids): msg_Dbg( p_demux, "stream[%u] midi is UNSUPPORTED", i ); /* fall through */ default: msg_Warn( p_demux, "stream[%u] unknown type %4.4s", i, (char *)&p_strh->i_type ); free( tk ); continue; } if( tk->fmt.i_cat != SPU_ES && (!tk->i_scale || !tk->i_rate || !(tk->i_rate * CLOCK_FREQ / tk->i_scale)) ) { msg_Warn( p_demux, "stream[%u] has invalid timescale", i ); es_format_Clean(&tk->fmt); free( tk ); continue; } tk->fmt.i_id = i; if( p_strn && p_strn->p_str ) tk->fmt.psz_description = FromACP( p_strn->p_str ); tk->p_es = es_out_Add( p_demux->out, &tk->fmt ); TAB_APPEND( p_sys->i_track, p_sys->track, tk ); } if( p_sys->i_track <= 0 ) { msg_Err( p_demux, "no valid track" ); goto error; } i_do_index = var_InheritInteger( p_demux, "avi-index" ); if( i_do_index == 1 ) /* Always fix */ { aviindex: if( p_sys->b_fastseekable ) { AVI_IndexCreate( p_demux ); } else if( p_sys->b_seekable ) { AVI_IndexLoad( p_demux ); } else { msg_Warn( p_demux, "cannot create index (unseekable stream)" ); } } else if( p_sys->b_seekable ) { AVI_IndexLoad( p_demux ); } /* *** movie length in vlc_tick_t *** */ p_sys->i_length = AVI_MovieGetLength( p_demux ); /* Check the index completeness */ unsigned int i_idx_totalframes = 0; for( unsigned int i = 0; i < p_sys->i_track; i++ ) { const avi_track_t *tk = p_sys->track[i]; if( tk->fmt.i_cat == VIDEO_ES && tk->idx.p_entry ) i_idx_totalframes = __MAX(i_idx_totalframes, tk->idx.i_size); } if( i_idx_totalframes != p_avih->i_totalframes && p_sys->i_length < VLC_TICK_FROM_US( p_avih->i_totalframes * p_avih->i_microsecperframe ) ) { msg_Warn( p_demux, "broken or missing index, 'seek' will be " "approximative or will exhibit strange behavior" ); if( (i_do_index == 0 || i_do_index == 3) && !b_index ) { if( !p_sys->b_fastseekable ) { b_index = true; goto aviindex; } if( i_do_index == 0 ) { const char *psz_msg = _( "Because this file index is broken or missing, " "seeking will not work correctly.\n" "VLC won't repair your file but can temporary fix this " "problem by building an index in memory.\n" "This step might take a long time on a large file.\n" "What do you want to do?"); switch( vlc_dialog_wait_question( p_demux, VLC_DIALOG_QUESTION_NORMAL, _("Do not play"), _("Build index then play"), _("Play as is"), _("Broken or missing Index"), "%s", psz_msg ) ) { case 0: b_aborted = true; goto error; case 1: b_index = true; msg_Dbg( p_demux, "Fixing AVI index" ); goto aviindex; } } else { b_index = true; msg_Dbg( p_demux, "Fixing AVI index" ); goto aviindex; } } } /* fix some BeOS MediaKit generated file */ for( unsigned i = 0 ; i < p_sys->i_track; i++ ) { avi_track_t *tk = p_sys->track[i]; avi_chunk_list_t *p_strl; avi_chunk_strf_auds_t *p_auds; if( tk->fmt.i_cat != AUDIO_ES ) { continue; } if( tk->idx.i_size < 1 || tk->i_scale != 1 || tk->i_samplesize != 0 ) { continue; } p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, tk->fmt.i_id, true ); p_auds = AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0, false ); if( p_auds && p_auds->p_wf->wFormatTag != WAVE_FORMAT_PCM && tk->i_rate == p_auds->p_wf->nSamplesPerSec ) { int64_t i_track_length = tk->idx.p_entry[tk->idx.i_size-1].i_length + tk->idx.p_entry[tk->idx.i_size-1].i_lengthtotal; vlc_tick_t i_length = VLC_TICK_FROM_US( p_avih->i_totalframes * p_avih->i_microsecperframe ); if( i_length == 0 ) { msg_Warn( p_demux, "track[%u] cannot be fixed (BeOS MediaKit generated)", i ); continue; } tk->i_samplesize = 1; tk->i_rate = i_track_length * CLOCK_FREQ / i_length; msg_Warn( p_demux, "track[%u] fixed with rate=%u scale=%u (BeOS MediaKit generated)", i, tk } } if( p_sys->b_seekable ) { /* we have read all chunk so go back to movi */ if( vlc_stream_Seek( p_demux->s, p_movi->i_chunk_pos ) ) goto error; } /* Skip movi header */ if( vlc_stream_Read( p_demux->s, NULL, 12 ) != 12 ) goto error; p_sys->i_movi_begin = p_movi->i_chunk_pos; return VLC_SUCCESS; error: Close( p_this ); return b_aborted ? VLC_ETIMEOUT : VLC_EGENERIC; } /***************************************************************************** * ReadFrame: Reads frame, using stride if necessary *****************************************************************************/ static block_t * ReadFrame( demux_t *p_demux, const avi_track_t *tk, uint32_t i_header, uint32_t i_osize ) { /* skip header */ if( i_header ) { assert(i_header % 8 == 0); ssize_t i_skip = vlc_stream_Read( p_demux->s, NULL, i_header ); if( i_skip < 0 || (size_t) i_skip < i_header ) return NULL; } /* read size padded on word boundary */ uint32_t i_size = __EVEN(i_osize); if( i_size == 0 ) return block_Alloc(0); /* vlc_stream_Block can't read/alloc 0 sized */ block_t *p_frame = vlc_stream_Block( p_demux->s, i_size ); if ( !p_frame ) return p_frame; if( i_osize == i_size - 1 ) p_frame->i_buffer--; if( tk->fmt.i_codec == FOURCC_DXSB && p_frame->i_buffer > XSUB_HEADER_SIZE ) { vlc_tick_t i_start, i_end; if( !ExtractXsubSampleInfo( p_frame->p_buffer, &i_start, &i_end ) ) { p_frame->i_dts = p_frame->i_pts = VLC_TICK_0 + i_start; if( i_end > i_start ) p_frame->i_length = i_start - i_end; } } if( tk->bihprops.i_stride > INT32_MAX - 3 ) { p_frame->i_buffer = 0; return p_frame; } const unsigned int i_stride_bytes = (tk->bihprops.i_stride + 3) & ~3; if ( !tk->bihprops.i_stride || !i_stride_bytes ) return p_frame; if( p_frame->i_buffer < i_stride_bytes ) { p_frame->i_buffer = 0; return p_frame; } if( !tk->bihprops.b_flipped ) { const uint8_t *p_src = p_frame->p_buffer + i_stride_bytes; const uint8_t *p_end = p_frame->p_buffer + p_frame->i_buffer; uint8_t *p_dst = p_frame->p_buffer + tk->bihprops.i_stride; p_frame->i_buffer = tk->bihprops.i_stride; while ( p_src + i_stride_bytes <= p_end ) { memmove( p_dst, p_src, tk->bihprops.i_stride ); p_src += i_stride_bytes; p_dst += tk->bihprops.i_stride; p_frame->i_buffer += tk->bihprops.i_stride; } } else { block_t *p_flippedframe = block_Alloc( p_frame->i_buffer ); if ( !p_flippedframe ) { block_Release( p_frame ); return NULL; } unsigned int i_lines = p_frame->i_buffer / i_stride_bytes; const uint8_t *p_src = p_frame->p_buffer + i_lines * i_stride_bytes; uint8_t *p_dst = p_flippedframe->p_buffer; p_flippedframe->i_buffer = 0; while ( i_lines-- > 0 ) { p_src -= i_stride_bytes; memcpy( p_dst, p_src, tk->bihprops.i_stride ); p_dst += tk->bihprops.i_stride; p_flippedframe->i_buffer += tk->bihprops.i_stride; } block_Release( p_frame ); p_frame = p_flippedframe; } return p_frame; } /***************************************************************************** * SendFrame: Sends frame to ES and does payload processing *****************************************************************************/ static void AVI_SendFrame( demux_t *p_demux, avi_track_t *tk, block_t *p_frame ) { demux_sys_t *p_sys = p_demux->p_sys; if( tk->fmt.i_cat != VIDEO_ES ) p_frame->i_dts = p_frame->i_pts; else { p_frame->i_dts = p_frame->i_pts; p_frame->i_pts = VLC_TICK_INVALID; } if( tk->i_dv_audio_rate ) AVI_DvHandleAudio( p_demux, tk, p_frame ); /* Strip 3rd party header */ if( tk->is_qnap ) { if( p_frame->i_buffer >= QNAP_VIDEO_HEADER_SIZE ) { const uint8_t *p = p_frame->p_buffer; /* Check header is really there */ vlc_fourcc_t fcc = VLC_FOURCC(p[0],p[1],p[2],p[3]); /* Parse QNAP header */ if( IsQNAPCodec(fcc) && p_sys->meta ) { const char *psz_title = vlc_meta_Get( p_sys->meta, vlc_meta_Title ); char *psz_osd = (char *) &p_frame->p_buffer[24]; if( *psz_osd != 0 ) { psz_osd[23] = 0; { char *str = psz_osd; ssize_t n; uint32_t cp; while ((n = vlc_towc(str, &cp)) != 0) if (likely(n != -1)) str += n; else { *str = '\0'; break; } } if( psz_osd[0] && ( !psz_title || strncmp( psz_osd, psz_title, 24 ) ) ) { vlc_meta_Set( p_sys->meta, vlc_meta_Title, psz_osd ); p_sys->updates |= INPUT_UPDATE_META; } } } p_frame->i_buffer -= QNAP_VIDEO_HEADER_SIZE; p_frame->p_buffer += QNAP_VIDEO_HEADER_SIZE; } } if( tk->i_next_block_flags ) { p_frame->i_flags = tk->i_next_block_flags; tk->i_next_block_flags = 0; } if( tk->p_es ) es_out_Send( p_demux->out, tk->p_es, p_frame ); else block_Release( p_frame ); } /***************************************************************************** * Demux_Seekable: reads and demuxes data packets for stream seekable ***************************************************************************** * AVIDemux: reads and demuxes data packets ***************************************************************************** * Returns -1 in case of error, 0 in case of EOF, 1 otherwise *****************************************************************************/ static int Demux_Seekable( demux_t *p_demux ) { demux_sys_t *p_sys = p_demux->p_sys; unsigned int i_track_count = 0; /* detect new selected/unselected streams */ for( unsigned int i = 0; i < p_sys->i_track; i++ ) { avi_track_t *tk = p_sys->track[i]; bool b = false; es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b ); if( tk->p_es_dv_audio ) { bool b_extra = false; es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es_dv_audio, &b_extra ); b |= b_extra; } if( b && !tk->b_activated ) { if( p_sys->b_seekable) { AVI_TrackSeek( p_demux, i, p_sys->i_time ); } tk->b_activated = true; } else if( !b && tk->b_activated ) { tk->b_activated = false; } if( b ) { i_track_count++; } } if( i_track_count <= 0 ) { p_sys->i_time += p_sys->i_read_increment; if( p_sys->i_length != 0 ) { if( p_sys->i_time >= p_sys->i_length ) return VLC_DEMUXER_EOF; return VLC_DEMUXER_SUCCESS; } msg_Warn( p_demux, "no track selected, exiting..." ); return VLC_DEMUXER_EOF; } /* wait for the good time */ es_out_SetPCR( p_demux->out, VLC_TICK_0 + p_sys->i_time ); p_sys->i_time += p_sys->i_read_increment; /* init toread */ for( unsigned i = 0; i < p_sys->i_track; i++ ) { avi_track_t *tk = p_sys->track[i]; tk->demuxctx.b_ok = tk->b_activated && !tk->b_eof; if( tk->i_idxposc < tk->idx.i_size ) { tk->demuxctx.i_posf = tk->idx.p_entry[tk->i_idxposc].i_pos; if( tk->i_idxposb > 0 ) { tk->demuxctx.i_posf += 8 + tk->i_idxposb; } } else { tk->demuxctx.i_posf = -1; } /* Xsub specific. There's no possible chunk/byte<->time */ if( tk->fmt.i_codec == FOURCC_DXSB ) { /* load spu times */ if( tk->i_next_embedded_time == VLC_TICK_INVALID && tk->demuxctx.i_posf != -1 ) tk->i_next_embedded_time = AVI_GetXsubSampleTimeAt( p_demux->s, tk->idx.p_entry[ tk->i_idxposc].i_pos ); vlc_tick_t i_reftime = tk->i_next_embedded_time != VLC_TICK_INVALID ? tk->i_next_embedded_time : tk->i_last_embedded_endtime; if( i_reftime != VLC_TICK_INVALID && p_sys->i_time - i_reftime > VLC_TICK_FROM_SEC(-2) ) tk->demuxctx.i_toread = 1; else tk->demuxctx.i_toread = -1; continue; } vlc_tick_t i_dpts = p_sys->i_time - AVI_GetPTS( tk ); if( tk->i_samplesize ) { tk->demuxctx.i_toread = AVI_PTSToByte( tk, i_dpts ); } else if ( i_dpts > VLC_TICK_FROM_SEC(-2) ) /* don't send a too early dts (low fps video) */ { int64_t i_chunks_count = AVI_PTSToChunk( tk, i_dpts ); if( i_chunks_count > 0 && AVI_GetDPTS( tk, i_chunks_count ) < i_dpts ) { /* AVI code is crap. toread is either bytes, or here, chunk count. * That does not even work when reading amount < scale / rate */ i_chunks_count++; } tk->demuxctx.i_toread = i_chunks_count; } else tk->demuxctx.i_toread = -1; } for( ;; ) { bool b_done = true; block_t *p_frame; int64_t i_pos = INT64_MAX; unsigned int i_track = 0; /* search for first chunk to be read */ for( unsigned i = 0; i < p_sys->i_track; i++ ) { avi_track_t *tk = p_sys->track[i]; if( !tk->demuxctx.b_ok || ( p_sys->b_fastseekable && p_sys->b_interleaved && AVI_GetDPTS( tk, tk->demuxctx.i_toread ) <= -p_sys->i_read_increment ) ) { continue; } if( tk->demuxctx.i_toread > 0 ) { b_done = false; /* not yet finished */ if( tk->demuxctx.i_posf >= 0 && i_pos > tk->demuxctx.i_posf ) { i_track = i; i_pos = tk->demuxctx.i_posf; } } } if( b_done ) { for( unsigned i = 0; i < p_sys->i_track; i++ ) { const avi_track_t *tk = p_sys->track[i]; if( tk->demuxctx.b_ok && tk->demuxctx.i_toread >= 0 ) return VLC_DEMUXER_SUCCESS; } msg_Warn( p_demux, "all tracks have failed, exiting..." ); return VLC_DEMUXER_EOF; } if( i_pos == INT64_MAX ) { unsigned short i_loop_count = 0; /* no valid index, we will parse directly the stream * in case we fail we will disable all finished stream */ if( p_sys->b_seekable && p_sys->i_movi_lastchunk_pos >= p_sys->i_movi_begin + 12 ) { if (vlc_stream_Seek(p_demux->s, p_sys->i_movi_lastchunk_pos)) return VLC_DEMUXER_EGENERIC; if( AVI_PacketNext( p_demux ) ) { return( AVI_TrackStopFinishedStreams( p_demux ) ? VLC_DEMUXER_EOF : VLC_DEMUXER_SUCCESS ); } } else { if (vlc_stream_Seek(p_demux->s, p_sys->i_movi_begin + 12)) return VLC_DEMUXER_EGENERIC; } for( ;; ) { avi_packet_t avi_pk; if( AVI_PacketGetHeader( p_demux, &avi_pk ) ) { msg_Warn( p_demux, "cannot get packet header, track disabled" ); return( AVI_TrackStopFinishedStreams( p_demux ) ? VLC_DEMUXER_EOF : VLC_DEMUXER_SUCCESS ); } if( avi_pk.i_stream >= p_sys->i_track || ( avi_pk.i_cat != AUDIO_ES && avi_pk.i_cat != VIDEO_ES ) ) { if( AVI_PacketNext( p_demux ) ) { msg_Warn( p_demux, "cannot skip packet, track disabled" ); return( AVI_TrackStopFinishedStreams( p_demux ) ? VLC_DEMUXER_EOF : VLC_DEMUXER_SUCCESS ); } if( !++i_loop_count ) msg_Warn( p_demux, "don't seem to find any data..." ); continue; } else { i_track = avi_pk.i_stream; avi_track_t *tk = p_sys->track[i_track]; /* add this chunk to the index */ avi_entry_t index; index.i_flags = AVI_GetKeyFlag(tk, avi_pk.i_peek); index.i_pos = avi_pk.i_pos; index.i_length = avi_pk.i_size; index.i_lengthtotal = index.i_length; int64_t i_indexid = avi_index_Append( &tk->idx, &p_sys->i_movi_lastchunk_pos, &index ); /* do we will read this data ? */ if( i_indexid >= 0 && AVI_GetDPTS( tk, tk->demuxctx.i_toread ) > -p_sys->i_read_increment ) { tk->i_idxposc = (unsigned int) i_indexid; tk->i_idxposb = 0; break; } else { if( AVI_PacketNext( p_demux ) ) { msg_Warn( p_demux, "cannot skip packet, track disabled" ); return( AVI_TrackStopFinishedStreams( p_demux ) ? VLC_DEMUXER_EOF : VLC_DEMUXER_SUCCESS ); } } } } } else { if (vlc_stream_Seek(p_demux->s, i_pos)) return VLC_DEMUXER_EGENERIC; } /* Set the track to use */ avi_track_t *tk = p_sys->track[i_track]; size_t i_size; unsigned i_ck_remaining_bytes = tk->idx.p_entry[tk->i_idxposc].i_length - tk->i_idxposb; /* read those data */ if( tk->i_samplesize ) { int64_t i_toread; /* remaining bytes to read inside the current read increment */ if( ( i_toread = tk->demuxctx.i_toread ) <= 0 ) { if( tk->i_samplesize > 1 ) { i_toread = tk->i_samplesize; } else { /* refill current read increment */ i_toread = AVI_PTSToByte( tk, VLC_TICK_FROM_MS(20) ); i_toread = __MAX( i_toread, 100 ); } } i_size = __MIN( i_ck_remaining_bytes, (size_t) i_toread ); } else { assert(tk->i_idxposb == 0); i_size = i_ck_remaining_bytes; } /* need to read and skip tag/header */ const uint8_t i_header = ( tk->i_idxposb == 0 ) ? 8 : 0; if( ( p_frame = ReadFrame( p_demux, tk, i_header, i_size ) )==NULL ) { msg_Warn( p_demux, "failed reading data" ); tk->b_eof = false; tk->demuxctx.b_ok = false; continue; } if( p_frame->i_pts == VLC_TICK_INVALID ) p_frame->i_pts = VLC_TICK_0 + AVI_GetPTS( tk ); else tk->i_last_embedded_endtime = p_frame->i_pts + p_frame->i_length; if( tk->idx.p_entry[tk->i_idxposc].i_flags&AVIIF_KEYFRAME ) { p_frame->i_flags = BLOCK_FLAG_TYPE_I; } else if( tk->fmt.i_cat == VIDEO_ES ) { p_frame->i_flags = BLOCK_FLAG_TYPE_PB; } /* advance chunk/byte pointers */ if( tk->i_samplesize ) { tk->demuxctx.i_toread -= i_size; tk->i_idxposb += i_size; if( tk->i_idxposb >= tk->idx.p_entry[tk->i_idxposc].i_length ) { tk->i_idxposb = 0; tk->i_idxposc++; } } else /* full chunk */ { /* Goto to next chunk */ tk->i_idxposc++; if( tk->fmt.i_cat == AUDIO_ES ) { tk->i_blockno += tk->i_blocksize > 0 ? ( i_size + tk->i_blocksize - 1 ) / tk->i_blocksize : 1; } else if( tk->fmt.i_cat == SPU_ES ) { tk->i_next_embedded_time = VLC_TICK_INVALID; } tk->demuxctx.i_toread--; } /* check new chunk and set new read pos */ if( tk->i_idxposc < tk->idx.i_size) { tk->demuxctx.i_posf = tk->idx.p_entry[tk->i_idxposc].i_pos; if( tk->i_idxposb > 0 ) { tk->demuxctx.i_posf += 8 + tk->i_idxposb; } } else /* all chunks read for this track */ { tk->demuxctx.i_posf = -1; } AVI_SendFrame( p_demux, tk, p_frame ); } } /***************************************************************************** * Demux_UnSeekable: reads and demuxes data packets for unseekable file ***************************************************************************** * Returns -1 in case of error, 0 in case of EOF, 1 otherwise *****************************************************************************/ static int Demux_UnSeekable( demux_t *p_demux ) { demux_sys_t *p_sys = p_demux->p_sys; avi_track_t *p_stream_master = NULL; unsigned int i_stream; unsigned int i_packet; es_out_SetPCR( p_demux->out, VLC_TICK_0 + p_sys->i_time ); /* *** find master stream for data packet skipping algo *** */ /* *** -> first video, if any, or first audio ES *** */ for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ ) { avi_track_t *tk = p_sys->track[i_stream]; bool b; es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b ); if( tk->p_es_dv_audio ) { bool b_extra; es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es_dv_audio, &b_extra ); b |= b_extra; } if( b ) { if( tk->fmt.i_cat == VIDEO_ES ) { p_stream_master = tk; break; } else if( !p_stream_master ) { p_stream_master = tk; } } } if( !p_stream_master ) { if( p_sys->i_track ) { p_stream_master = p_sys->track[0]; } else { msg_Warn( p_demux, "no more stream selected" ); return VLC_DEMUXER_EOF; } } p_sys->i_time = AVI_GetPTS( p_stream_master ); for( i_packet = 0; i_packet < 10; i_packet++) { avi_packet_t avi_pk; if( AVI_PacketGetHeader( p_demux, &avi_pk ) ) { return VLC_DEMUXER_EOF; } if( avi_pk.i_stream >= p_sys->i_track || ( avi_pk.i_cat != AUDIO_ES && avi_pk.i_cat != VIDEO_ES ) ) { /* we haven't found an audio or video packet: * - we have seek, found first next packet * - others packets could be found, skip them */ switch( avi_pk.i_fourcc ) { case AVIFOURCC_JUNK: case AVIFOURCC_LIST: case AVIFOURCC_RIFF: return( !AVI_PacketNext( p_demux ) ? VLC_DEMUXER_SUCCESS : VLC_DEMUXER_EOF ); case AVIFOURCC_idx1: if( p_sys->b_odml ) { return( !AVI_PacketNext( p_demux ) ? VLC_DEMUXER_SUCCESS : VLC_DEMUXER_EOF ); } return VLC_DEMUXER_EOF; default: msg_Warn( p_demux, "seems to have lost position @%"PRIu64", resync", vlc_stream_Tell(p_demux->s) ); if( AVI_PacketSearch( p_demux ) ) { msg_Err( p_demux, "resync failed" ); return VLC_DEMUXER_EGENERIC; } } } else { avi_track_t *p_stream = p_sys->track[avi_pk.i_stream]; /* check for time */ if( p_stream == p_stream_master || llabs( AVI_GetPTS( p_stream ) - AVI_GetPTS( p_stream_master ) )< VLC_TICK_FROM_SEC(2) ) { /* load it and send to decoder */ block_t *p_frame = ReadFrame( p_demux, p_stream, 8, avi_pk.i_size ) ; if( p_frame == NULL ) { return VLC_DEMUXER_EGENERIC; } if( p_frame->i_pts == VLC_TICK_INVALID ) p_frame->i_pts = VLC_TICK_0 + AVI_GetPTS( p_stream ); else p_stream->i_last_embedded_endtime = p_frame->i_pts + p_frame->i_length; AVI_SendFrame( p_demux, p_stream, p_frame ); } else { if( AVI_PacketNext( p_demux ) ) { return VLC_DEMUXER_EOF; } } /* *** update stream time position *** */ if( p_stream->i_samplesize ) { p_stream->i_idxposb += avi_pk.i_size; } else { if( p_stream->fmt.i_cat == AUDIO_ES ) { p_stream->i_blockno += p_stream->i_blocksize > 0 ? ( avi_pk.i_size + p_stream->i_blocksize - 1 ) } p_stream->i_idxposc++; p_stream->i_next_embedded_time = VLC_TICK_INVALID; } } } return VLC_DEMUXER_SUCCESS; } /***************************************************************************** * Seek: goto to i_date or i_percent *****************************************************************************/ static int Seek( demux_t *p_demux, vlc_tick_t i_date, double f_ratio, bool b_accurate ) { demux_sys_t *p_sys = p_demux->p_sys; msg_Dbg( p_demux, "seek requested: %"PRId64" seconds %2.2f%%", SEC_FROM_VLC_TICK(i_date), f_ratio * 100 ); if( p_sys->b_seekable ) { uint64_t i_pos_backup = vlc_stream_Tell( p_demux->s ); /* Check and lazy load indexes if it was not done (not fastseekable) */ if ( !p_sys->b_indexloaded && ( p_sys->i_avih_flags & AVIF_HASINDEX ) ) { avi_chunk_t *p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0, true ); if (unlikely( !p_riff )) return VLC_EGENERIC; int i_ret = AVI_ChunkFetchIndexes( p_demux->s, p_riff ); if ( i_ret ) { /* Go back to position before index failure */ if (vlc_stream_Tell(p_demux->s) != i_pos_backup && vlc_stream_Seek(p_demux->s, i_pos_backup)) return VLC_EGENERIC; if ( p_sys->i_avih_flags & AVIF_MUSTUSEINDEX ) return VLC_EGENERIC; } else AVI_IndexLoad( p_demux ); p_sys->b_indexloaded = true; /* we don't want to try each time */ } if( p_sys->i_length == 0 ) { avi_track_t *p_stream = NULL; uint64_t i_pos, i_stream_size; if( vlc_stream_GetSize( p_demux->s, &i_stream_size ) != VLC_SUCCESS ) goto failandresetpos; if ( !p_sys->i_movi_lastchunk_pos && /* set when index is successfully loaded */ ! ( p_sys->i_avih_flags & AVIF_ISINTERLEAVED ) ) { msg_Warn( p_demux, "seeking without index at %2.2f%%" " only works for interleaved files", f_ratio * 100 ); goto failandresetpos; } /* use i_percent to create a true i_date */ if( f_ratio >= 1.0 ) { msg_Warn( p_demux, "cannot seek so far !" ); goto failandresetpos; } f_ratio = __MAX( f_ratio, 0 ); /* try to find chunk that is at i_percent or the file */ i_pos = __MAX( f_ratio * i_stream_size, p_sys->i_movi_begin ); /* search first selected stream (and prefer non-EOF ones) */ for( unsigned i = 0; i < p_sys->i_track; i++ ) { avi_track_t *p_track = p_sys->track[i]; if( !p_track->b_activated || p_track->fmt.i_cat == SPU_ES ) continue; p_stream = p_track; if( !p_track->b_eof ) break; } if( p_stream == NULL ) { msg_Warn( p_demux, "cannot find any selected stream" ); goto failandresetpos; } /* be sure that the index exist */ if( AVI_StreamChunkSet( p_demux, p_stream, 0 ) ) { msg_Warn( p_demux, "cannot seek" ); goto failandresetpos; } while( i_pos >= p_stream->idx.p_entry[p_stream->i_idxposc].i_pos + p_stream->idx.p_entry[p_stream->i_idxposc].i_length + 8 ) { /* search after i_idxposc */ if( AVI_StreamChunkSet( p_demux, p_stream, p_stream->i_idxposc + 1 ) ) { msg_Warn( p_demux, "cannot seek" ); goto failandresetpos; } } i_date = AVI_GetPTS( p_stream ); /* TODO better support for i_samplesize != 0 */ msg_Dbg( p_demux, "estimate date %"PRId64, i_date ); } /* */ vlc_tick_t i_wanted = i_date; vlc_tick_t i_start = i_date; /* Do a 2 pass seek, first with video (can seek ahead due to keyframes), so we can seek audio to the same starting time */ for(int i=0; i<2; i++) { for( unsigned i_stream = 0; i_stream < p_sys->i_track; i_stream++ ) { avi_track_t *p_stream = p_sys->track[i_stream]; if( !p_stream->b_activated ) continue; if( (i==0 && p_stream->fmt.i_cat != VIDEO_ES) || (i!=0 && p_stream->fmt.i_cat == VIDEO_ES) ) continue; p_stream->b_eof = AVI_TrackSeek( p_demux, i_stream, i_wanted ) != 0; if( !p_stream->b_eof ) { p_stream->i_next_block_flags |= BLOCK_FLAG_DISCONTINUITY; if( p_stream->fmt.i_cat == AUDIO_ES || p_stream->fmt.i_cat == VIDEO_ES ) i_start = __MIN(i_start, AVI_GetPTS( p_stream )); if( i == 0 && p_stream->fmt.i_cat == VIDEO_ES ) i_wanted = i_start; } } } p_sys->i_time = i_start; es_out_SetPCR( p_demux->out, VLC_TICK_0 + p_sys->i_time ); if( b_accurate ) es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, VLC_TICK_0 + i_date ); msg_Dbg( p_demux, "seek: %"PRId64" seconds", SEC_FROM_VLC_TICK(p_sys->i_time) ); return VLC_SUCCESS; failandresetpos: /* Go back to position before index failure */ if ( vlc_stream_Tell( p_demux->s ) - i_pos_backup ) vlc_stream_Seek( p_demux->s, i_pos_backup ); return VLC_EGENERIC; } else { msg_Err( p_demux, "shouldn't yet be executed" ); return VLC_EGENERIC; } } /***************************************************************************** * Control: *****************************************************************************/ static double ControlGetPosition( demux_t *p_demux ) { demux_sys_t *p_sys = p_demux->p_sys; uint64_t i_size; if( p_sys->i_length != 0 ) { return (double)p_sys->i_time / (double)p_sys->i_length; } else if( vlc_stream_GetSize( p_demux->s, &i_size ) == VLC_SUCCESS && i_size ) { double i64 = vlc_stream_Tell( p_demux->s ); return i64 / i_size; } return 0.0; } static int Control( demux_t *p_demux, int i_query, va_list args ) { demux_sys_t *p_sys = p_demux->p_sys; double f, *pf; vlc_tick_t i64; bool b; vlc_meta_t *p_meta; switch( i_query ) { case DEMUX_CAN_SEEK: *va_arg( args, bool * ) = p_sys->b_seekable; return VLC_SUCCESS; case DEMUX_GET_POSITION: pf = va_arg( args, double * ); *pf = ControlGetPosition( p_demux ); return VLC_SUCCESS; case DEMUX_SET_POSITION: f = va_arg( args, double ); b = va_arg( args, int ); if ( !p_sys->b_seekable ) { return VLC_EGENERIC; } else { i64 = f * p_sys->i_length; return Seek( p_demux, i64, f, b ); } case DEMUX_GET_TIME: *va_arg( args, vlc_tick_t * ) = p_sys->i_time; return VLC_SUCCESS; case DEMUX_SET_TIME: { f = 0; i64 = va_arg( args, vlc_tick_t ); b = va_arg( args, int ); if( !p_sys->b_seekable ) { return VLC_EGENERIC; } else if( p_sys->i_length != 0 ) { f = (double)i64 / p_sys->i_length; } else if( p_sys->i_time > 0 ) { f = ControlGetPosition( p_demux ) * (double) i64 / (double)p_sys->i_time; } return Seek( p_demux, i64, f, b ); } case DEMUX_GET_LENGTH: *va_arg( args, vlc_tick_t * ) = p_sys->i_length; return VLC_SUCCESS; case DEMUX_GET_FPS: pf = va_arg( args, double * ); *pf = 0.0; for( unsigned i = 0; i < p_sys->i_track; i++ ) { avi_track_t *tk = p_sys->track[i]; if( tk->fmt.i_cat == VIDEO_ES && tk->i_scale > 0) { *pf = (float)tk->i_rate / (float)tk->i_scale; break; } } return VLC_SUCCESS; case DEMUX_GET_META: p_meta = va_arg( args, vlc_meta_t * ); vlc_meta_Merge( p_meta, p_sys->meta ); return VLC_SUCCESS; case DEMUX_GET_ATTACHMENTS: { if( p_sys->i_attachment <= 0 ) return VLC_EGENERIC; input_attachment_t ***ppp_attach = va_arg( args, input_attachment_t*** ); int *pi_int = va_arg( args, int * ); *ppp_attach = calloc( p_sys->i_attachment, sizeof(**ppp_attach) ); if( likely(*ppp_attach) ) { *pi_int = p_sys->i_attachment; for( unsigned i = 0; i < p_sys->i_attachment; i++ ) (*ppp_attach)[i] = vlc_input_attachment_Hold( p_sys->attachment[i] ); return VLC_SUCCESS; } return VLC_EGENERIC; } case DEMUX_TEST_AND_CLEAR_FLAGS: { unsigned *restrict flags = va_arg( args, unsigned * ); *flags &= p_sys->updates; p_sys->updates &= ~*flags; return VLC_SUCCESS; } case DEMUX_CAN_PAUSE: case DEMUX_SET_PAUSE_STATE: case DEMUX_CAN_CONTROL_PACE: case DEMUX_GET_PTS_DELAY: return demux_vaControlHelper( p_demux->s, 0, -1, 0, 1, i_query, args ); default: return VLC_EGENERIC; } } /***************************************************************************** * Function to convert pts to chunk or byte *****************************************************************************/ static int64_t AVI_Rescale( vlc_tick_t i_value, uint32_t i_timescale, uint32_t i_newscal { /* TODO: replace (and mp4) with better global helper (recursive checks) */ if( i_timescale == i_newscale ) return i_value; if( (i_value >= 0 && i_value <= VLC_TICK_MAX / i_newscale) || (i_value < 0 && i_value >= VLC_TICK_MIN / i_newscale) ) return i_value * i_newscale / i_timescale; /* overflow */ int64_t q = i_value / i_timescale; int64_t r = i_value % i_timescale; return q * i_newscale + r * i_newscale / i_timescale; } static int64_t AVI_PTSToChunk( avi_track_t *tk, vlc_tick_t i_pts ) { if( !tk->i_scale || !tk->i_rate ) return -1; i_pts = AVI_Rescale( i_pts, tk->i_scale, tk->i_rate ); return SEC_FROM_VLC_TICK(i_pts); } static int64_t AVI_PTSToByte( avi_track_t *tk, vlc_tick_t i_pts ) { if( !tk->i_scale || !tk->i_samplesize || !tk->i_rate ) return -1; i_pts = AVI_Rescale( i_pts, tk->i_scale, tk->i_rate ); return samples_from_vlc_tick( i_pts, tk->i_samplesize ); } static vlc_tick_t AVI_GetDPTS( avi_track_t *tk, int64_t i_count ) { vlc_tick_t i_dpts = 0; if( !tk->i_rate ) return 0; if( !tk->i_scale ) return 0; i_dpts = AVI_Rescale( CLOCK_FREQ * i_count, tk->i_rate, tk->i_scale ); if( tk->i_samplesize ) { return i_dpts / tk->i_samplesize; } return i_dpts; } static vlc_tick_t AVI_GetPTS( avi_track_t *tk ) { /* Lookup samples index */ if( tk->i_samplesize && tk->idx.i_size ) { int64_t i_count = 0; unsigned int idx = tk->i_idxposc; /* we need a valid entry we will emulate one */ if( idx >= tk->idx.i_size ) { /* use the last entry */ idx = tk->idx.i_size - 1; i_count = tk->idx.p_entry[idx].i_lengthtotal + tk->idx.p_entry[idx].i_length; } else { i_count = tk->idx.p_entry[idx].i_lengthtotal; } return AVI_GetDPTS( tk, i_count + tk->i_idxposb ); } if( tk->fmt.i_cat == AUDIO_ES ) return AVI_GetDPTS( tk, tk->i_blockno ); else return AVI_GetDPTS( tk, tk->i_idxposc ); } static int AVI_StreamChunkFind( demux_t *p_demux, avi_track_t *tk ) { demux_sys_t *p_sys = p_demux->p_sys; avi_packet_t avi_pk; unsigned short i_loop_count = 0; /* find first chunk of i_stream that isn't in index */ if( p_sys->i_movi_lastchunk_pos >= p_sys->i_movi_begin + 12 ) { if (vlc_stream_Seek(p_demux->s, p_sys->i_movi_lastchunk_pos)) return VLC_EGENERIC; if( AVI_PacketNext( p_demux ) ) { return VLC_EGENERIC; } } else { if (vlc_stream_Seek(p_demux->s, p_sys->i_movi_begin + 12)) return VLC_EGENERIC; } for( ;; ) { if( AVI_PacketGetHeader( p_demux, &avi_pk ) ) { msg_Warn( p_demux, "cannot get packet header" ); return VLC_EGENERIC; } if( avi_pk.i_stream >= p_sys->i_track || ( avi_pk.i_cat != AUDIO_ES && avi_pk.i_cat != VIDEO_ES ) ) { if( AVI_PacketNext( p_demux ) ) { return VLC_EGENERIC; } if( !++i_loop_count ) msg_Warn( p_demux, "don't seem to find any data..." ); } else { avi_track_t *tk_pk = p_sys->track[avi_pk.i_stream]; /* add this chunk to the index */ avi_entry_t index; index.i_flags = AVI_GetKeyFlag(tk_pk, avi_pk.i_peek); index.i_pos = avi_pk.i_pos; index.i_length = avi_pk.i_size; index.i_lengthtotal = index.i_length; avi_index_Append( &tk_pk->idx, &p_sys->i_movi_lastchunk_pos, &index ); if( tk_pk == tk ) { return VLC_SUCCESS; } if( AVI_PacketNext( p_demux ) ) { return VLC_EGENERIC; } } } } /* be sure that i_ck will be a valid index entry */ static int AVI_StreamChunkSet( demux_t *p_demux, avi_track_t *p_stream, unsigned int i_ck ) { p_stream->i_idxposc = i_ck; p_stream->i_idxposb = 0; if( i_ck >= p_stream->idx.i_size ) { p_stream->i_idxposc = p_stream->idx.i_size - 1; do { p_stream->i_idxposc++; if( AVI_StreamChunkFind( p_demux, p_stream ) ) { return VLC_EGENERIC; } } while( p_stream->i_idxposc < i_ck ); } return VLC_SUCCESS; } /* XXX FIXME up to now, we assume that all chunk are one after one */ static int AVI_StreamBytesSet( demux_t *p_demux, avi_track_t *p_stream, uint64_t i_byte ) { if( ( p_stream->idx.i_size > 0 ) &&( i_byte < p_stream->idx.p_entry[p_stream->idx.i_size - 1].i_lengthtotal + p_stream->idx.p_entry[p_stream->idx.i_size - 1].i_length ) ) { /* index is valid to find the ck */ /* uses dichototmie to be fast enough */ int i_idxposc = __MIN( p_stream->i_idxposc, p_stream->idx.i_size - 1 ); int i_idxmax = p_stream->idx.i_size; int i_idxmin = 0; for( ;; ) { if( p_stream->idx.p_entry[i_idxposc].i_lengthtotal > i_byte ) { i_idxmax = i_idxposc ; i_idxposc = ( i_idxmin + i_idxposc ) / 2 ; } else { if( p_stream->idx.p_entry[i_idxposc].i_lengthtotal + p_stream->idx.p_entry[i_idxposc].i_length <= i_byte) { i_idxmin = i_idxposc ; i_idxposc = (i_idxmax + i_idxposc ) / 2 ; } else { p_stream->i_idxposc = i_idxposc; p_stream->i_idxposb = i_byte - p_stream->idx.p_entry[i_idxposc].i_lengthtotal; return VLC_SUCCESS; } } } } else { p_stream->i_idxposc = p_stream->idx.i_size - 1; p_stream->i_idxposb = 0; do { p_stream->i_idxposc++; if( AVI_StreamChunkFind( p_demux, p_stream ) ) { return VLC_EGENERIC; } } while( p_stream->idx.p_entry[p_stream->i_idxposc].i_lengthtotal + p_stream->idx.p_entry[p_stream->i_idxposc].i_length <= i_byte ); p_stream->i_idxposb = i_byte - p_stream->idx.p_entry[p_stream->i_idxposc].i_lengthtotal; return VLC_SUCCESS; } } static int AVI_TrackSeek( demux_t *p_demux, int i_stream, vlc_tick_t i_date ) { demux_sys_t *p_sys = p_demux->p_sys; avi_track_t *tk = p_sys->track[i_stream]; vlc_tick_t i_oldpts; if( tk->fmt.i_cat == SPU_ES ) return AVI_SeekSubtitleTrack( p_sys, tk ); i_oldpts = AVI_GetPTS( tk ); if( !tk->i_samplesize ) { int64_t idxpos = AVI_PTSToChunk( tk, i_date ); if ( unlikely( idxpos < 0 || idxpos > UINT_MAX ) ) return VLC_EGENERIC; if( AVI_StreamChunkSet( p_demux, tk, idxpos ) ) { return VLC_EGENERIC; } if( tk->fmt.i_cat == AUDIO_ES ) { if( tk->i_blocksize > 0 ) { tk->i_blockno = tk->i_idxposc; } else { tk->i_blockno = 0; for( unsigned int i = 0; i < tk->i_idxposc; i++ ) tk->i_blockno += ( tk->idx.p_entry[i].i_length + tk->i_blocksize - 1 ) / tk->i_blocksize; } } msg_Dbg( p_demux, "old:%"PRId64" %s new %"PRId64, i_oldpts, i_oldpts > i_date ? ">" : "<", i_date ); if( tk->fmt.i_cat == VIDEO_ES ) { /* search key frame */ //if( i_date < i_oldpts || 1 ) { while( tk->i_idxposc > 0 && !( tk->idx.p_entry[tk->i_idxposc].i_flags & AVIIF_KEYFRAME ) ) { if( AVI_StreamChunkSet( p_demux, tk, tk->i_idxposc - 1 ) ) { return VLC_EGENERIC; } } } #if 0 else { while( tk->i_idxposc < tk->idx.i_size && !( tk->idx.p_entry[tk->i_idxposc].i_flags & AVIIF_KEYFRAME ) ) { if( AVI_StreamChunkSet( p_demux, tk, tk->i_idxposc + 1 ) ) { return VLC_EGENERIC; } } } #endif } } else { int64_t toread = AVI_PTSToByte( tk, i_date ); if ( toread < 0) return VLC_EGENERIC; if( AVI_StreamBytesSet( p_demux, tk, toread ) ) { return VLC_EGENERIC; } } return VLC_SUCCESS; } /**************************************************************************** * Return true if it's a key frame ****************************************************************************/ static int AVI_GetKeyFlag( const avi_track_t *tk, const uint8_t *p_byte ) { if( tk->is_qnap ) { const uint8_t *p = p_byte; if( IsQNAPCodec(VLC_FOURCC(p[0],p[1],p[2],p[3])) ) return p[4] & 0x01 ? AVIIF_KEYFRAME : 0; } switch( tk->fmt.i_codec ) { case VLC_CODEC_DIV1: /* we have: * startcode: 0x00000100 32bits * framenumber ? 5bits * piture type 0(I),1(P) 2bits */ if( GetDWBE( p_byte ) != 0x00000100 ) { /* it's not an msmpegv1 stream, strange...*/ return AVIIF_KEYFRAME; } return p_byte[4] & 0x06 ? 0 : AVIIF_KEYFRAME; case VLC_CODEC_DIV2: case VLC_CODEC_DIV3: case VLC_CODEC_WMV1: /* we have * picture type 0(I),1(P) 2bits */ return p_byte[0] & 0xC0 ? 0 : AVIIF_KEYFRAME; case VLC_CODEC_MP4V: /* we should find first occurrence of 0x000001b6 (32bits) * startcode: 0x000001b6 32bits * piture type 0(I),1(P) 2bits */ if( GetDWBE( p_byte ) != 0x000001b6 ) { /* not true , need to find the first VOP header */ return AVIIF_KEYFRAME; } return p_byte[4] & 0xC0 ? 0 : AVIIF_KEYFRAME; case VLC_CODEC_H264: { uint32_t bytes = GetDWBE( p_byte ); enum h264_nal_unit_type_e i_nal_type; if( bytes == 0x00000001 ) i_nal_type = h264_getNALType( &p_byte[4] ); else if( (bytes & 0xFFFFFF00) == 0x00000100 ) i_nal_type = h264_getNALType( &p_byte[3] ); else return i_nal_type = 0; return (i_nal_type == H264_NAL_SLICE_IDR) ? AVIIF_KEYFRAME : 0; } case VLC_CODEC_HEVC: { uint32_t bytes = GetDWBE( p_byte ); uint8_t i_nal_type; if( bytes == 0x00000001 ) i_nal_type = hevc_getNALType( &p_byte[4] ); else if( (bytes & 0xFFFFFF00) == 0x00000100 ) i_nal_type = hevc_getNALType( &p_byte[3] ); else i_nal_type = 0; return (i_nal_type >= HEVC_NAL_IDR_W_RADL && i_nal_type <= HEVC_NAL_CRA) ? AVIIF_KEYFRAME : 0; } default: /* I can't do it, so say yes */ return AVIIF_KEYFRAME; } } vlc_fourcc_t AVI_FourccGetCodec( unsigned int i_cat, vlc_fourcc_t i_codec ) { switch( i_cat ) { case AUDIO_ES: wf_tag_to_fourcc( i_codec, &i_codec, NULL ); return i_codec; case VIDEO_ES: return vlc_fourcc_GetCodec( i_cat, i_codec ); default: return VLC_CODEC_UNKNOWN; } } /**************************************************************************** * ****************************************************************************/ static void AVI_ParseStreamHeader( vlc_fourcc_t i_id, unsigned int *pi_number, enum es_format_category_e *pi_type ) { int c1, c2; c1 = ((uint8_t *)&i_id)[0]; c2 = ((uint8_t *)&i_id)[1]; if( c1 < '0' || c1 > '9' || c2 < '0' || c2 > '9' ) { *pi_number = AVIF_MAX_STREAMS; /* > max stream number */ *pi_type = UNKNOWN_ES; } else { *pi_number = (c1 - '0') * 10 + (c2 - '0' ); switch( VLC_TWOCC( ((uint8_t *)&i_id)[2], ((uint8_t *)&i_id)[3] ) ) { case AVITWOCC_wb: *pi_type = AUDIO_ES; break; case AVITWOCC_dc: case AVITWOCC_db: case AVITWOCC_AC: *pi_type = VIDEO_ES; break; case AVITWOCC_tx: case AVITWOCC_sb: *pi_type = SPU_ES; break; case AVITWOCC_pc: *pi_type = IGNORE_ES; break; default: *pi_type = UNKNOWN_ES; break; } } } /**************************************************************************** * ****************************************************************************/ static int AVI_PacketGetHeader( demux_t *p_demux, avi_packet_t *p_pk ) { const uint8_t *p_peek; if( vlc_stream_Peek( p_demux->s, &p_peek, 16 ) < 16 ) { return VLC_EGENERIC; } p_pk->i_fourcc = VLC_FOURCC( p_peek[0], p_peek[1], p_peek[2], p_peek[3] ); p_pk->i_size = GetDWLE( p_peek + 4 ); p_pk->i_pos = vlc_stream_Tell( p_demux->s ); if( p_pk->i_fourcc == AVIFOURCC_LIST || p_pk->i_fourcc == AVIFOURCC_RIFF ) { p_pk->i_type = VLC_FOURCC( p_peek[8], p_peek[9], p_peek[10], p_peek[11] ); } else { p_pk->i_type = 0; } memcpy( p_pk->i_peek, p_peek + 8, 8 ); AVI_ParseStreamHeader( p_pk->i_fourcc, &p_pk->i_stream, &p_pk->i_cat ); return VLC_SUCCESS; } static int AVI_PacketNext( demux_t *p_demux ) { avi_packet_t avi_ck; uint32_t i_skip = 0; if( AVI_PacketGetHeader( p_demux, &avi_ck ) ) { return VLC_EGENERIC; } if( avi_ck.i_fourcc == AVIFOURCC_LIST && ( avi_ck.i_type == AVIFOURCC_rec || avi_ck.i_type == AVIFOURCC_movi ) ) { i_skip = 12; } else if( avi_ck.i_fourcc == AVIFOURCC_RIFF && avi_ck.i_type == AVIFOURCC_AVIX ) { i_skip = 24; } else { if( avi_ck.i_size > UINT32_MAX - 9 ) return VLC_EGENERIC; i_skip = __EVEN( avi_ck.i_size ) + 8; } #if SSIZE_MAX < UINT32_MAX // otherwise i_skip can't be bigger than SSIZE_MAX if (i_skip > SSIZE_MAX) return VLC_EGENERIC; #endif if( vlc_stream_Read( p_demux->s, NULL, i_skip ) != i_skip ) { return VLC_EGENERIC; } return VLC_SUCCESS; } static int AVI_PacketSearch( demux_t *p_demux ) { demux_sys_t *p_sys = p_demux->p_sys; avi_packet_t avi_pk; unsigned short i_count = 0; for( ;; ) { if( vlc_stream_Read( p_demux->s, NULL, 1 ) != 1 ) { return VLC_EGENERIC; } AVI_PacketGetHeader( p_demux, &avi_pk ); if( avi_pk.i_stream < p_sys->i_track && ( avi_pk.i_cat == AUDIO_ES || avi_pk.i_cat == VIDEO_ES ) ) { return VLC_SUCCESS; } switch( avi_pk.i_fourcc ) { case AVIFOURCC_JUNK: case AVIFOURCC_LIST: case AVIFOURCC_RIFF: case AVIFOURCC_idx1: return VLC_SUCCESS; } if( !++i_count ) msg_Warn( p_demux, "trying to resync..." ); } } /**************************************************************************** * Index stuff. ****************************************************************************/ static void avi_index_Init( avi_index_t *p_index ) { p_index->i_size = 0; p_index->i_max = 0; p_index->p_entry = NULL; } static void avi_index_Clean( avi_index_t *p_index ) { free( p_index->p_entry ); } #define MAX_INDEX_ENTRIES __MIN(SIZE_MAX/sizeof(avi_entry_t), UINT32_MAX) #define INDEX_EXTENT 16384 static int64_t avi_index_Append( avi_index_t *p_index, uint64_t *pi_last_pos, avi_entry_t *p_entry ) { /* Update last chunk position */ if( *pi_last_pos < p_entry->i_pos ) *pi_last_pos = p_entry->i_pos; if( p_index->i_size == MAX_INDEX_ENTRIES ) return -1; /* add the entry */ if( p_index->i_size >= p_index->i_max ) { if( MAX_INDEX_ENTRIES - INDEX_EXTENT > p_index->i_max ) p_index->i_max += INDEX_EXTENT; else p_index->i_max = MAX_INDEX_ENTRIES; void *r_entry = vlc_reallocarray( p_index->p_entry, p_index->i_max, sizeof(avi_entry_t) ); if( unlikely( r_entry == NULL ) ) { free( p_index->p_entry ); avi_index_Init( p_index ); return -1; } p_index->p_entry = r_entry; } /* calculate cumulate length */ if( p_index->i_size > 0 ) { p_entry->i_lengthtotal = p_index->p_entry[p_index->i_size - 1].i_length + p_index->p_entry[p_index->i_size - 1].i_lengthtotal; } else { p_entry->i_lengthtotal = 0; } p_index->p_entry[p_index->i_size++] = *p_entry; return p_index->i_size - 1; } static int AVI_IndexFind_idx1( demux_t *p_demux, avi_chunk_idx1_t **pp_idx1, uint64_t *pi_offset ) { demux_sys_t *p_sys = p_demux->p_sys; avi_chunk_list_t *p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0, true); avi_chunk_idx1_t *p_idx1 = AVI_ChunkFind( p_riff, AVIFOURCC_idx1, 0, false); if( !p_idx1 ) { msg_Warn( p_demux, "cannot find idx1 chunk, no index defined" ); return VLC_EGENERIC; } *pp_idx1 = p_idx1; /* The offset in the index should be from the start of the movi content, * but some broken files use offset from the start of the file. Just * checking the offset of the first packet is not enough as some files * has unused chunk at the beginning of the movi content. */ avi_chunk_list_t *p_movi = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0, true ); if( !p_movi ) return VLC_EGENERIC; uint64_t i_first_pos = UINT64_MAX; for( unsigned i = 0; i < __MIN( p_idx1->i_entry_count, 100 ); i++ ) { if ( p_idx1->entry[i].i_length > 0 ) i_first_pos = __MIN( i_first_pos, p_idx1->entry[i].i_pos ); } const uint64_t i_movi_content = p_movi->i_chunk_pos + 8; if( i_first_pos < i_movi_content ) { *pi_offset = i_movi_content; } else if( p_sys->b_seekable && i_first_pos < UINT64_MAX ) { const uint8_t *p_peek; if( !vlc_stream_Seek( p_demux->s, i_movi_content + i_first_pos ) && vlc_stream_Peek( p_demux->s, &p_peek, 4 ) >= 4 && ( !isdigit( p_peek[0] ) || !isdigit( p_peek[1] ) || !isalpha( p_peek[2] ) || !isalpha( p_peek[3] ) ) ) *pi_offset = 0; else *pi_offset = i_movi_content; if( p_idx1->i_entry_count ) { /* Invalidate offset if index refers past the data section to avoid false positives when the offset equals sample size */ size_t i_dataend = *pi_offset + p_idx1->entry[p_idx1->i_entry_count - 1].i_pos + p_idx1->entry[p_idx1->i_entry_count - 1].i_length; if( i_dataend > p_movi->i_chunk_pos + p_movi->i_chunk_size ) *pi_offset = 0; } } else { *pi_offset = 0; } return VLC_SUCCESS; } static int AVI_IndexLoad_idx1( demux_t *p_demux, avi_index_t p_index[], uint64_t *pi_last_offset ) { demux_sys_t *p_sys = p_demux->p_sys; avi_chunk_idx1_t *p_idx1; uint64_t i_offset; if( AVI_IndexFind_idx1( p_demux, &p_idx1, &i_offset ) ) return VLC_EGENERIC; p_sys->b_indexloaded = true; for( unsigned i_index = 0; i_index < p_idx1->i_entry_count; i_index++ ) { enum es_format_category_e i_cat; unsigned i_stream; AVI_ParseStreamHeader( p_idx1->entry[i_index].i_fourcc, &i_stream, &i_cat ); if( i_stream < p_sys->i_track && (i_cat == p_sys->track[i_stream]->fmt.i_cat || i_cat == UNKNOWN_ES ) ) { avi_entry_t index; index.i_flags = p_idx1->entry[i_index].i_flags&(~AVIIF_FIXKEYFRAME); index.i_pos = p_idx1->entry[i_index].i_pos + i_offset; index.i_length = p_idx1->entry[i_index].i_length; index.i_lengthtotal = index.i_length; avi_index_Append( &p_index[i_stream], pi_last_offset, &index ); } } #ifdef AVI_DEBUG for( unsigned i_index = 0; i_index< p_idx1->i_entry_count && i_index < p_sys->i_track; i_index++ ) { for( unsigned i = 0; i < p_index[i_index].i_size; i++ ) { vlc_tick_t i_length; if( p_sys->track[i_index]->i_samplesize ) { i_length = AVI_GetDPTS( p_sys->track[i_index], p_index[i_index].p_entry[i].i_lengthtotal ); } else { i_length = AVI_GetDPTS( p_sys->track[i_index], i ); } msg_Dbg( p_demux, "index stream %d @%ld time %ld", i_index, p_index[i_index].p_entry[i].i_pos, i_length ); } } #endif return VLC_SUCCESS; } static void __Parse_indx( demux_t *p_demux, avi_index_t *p_index, uint64_t *pi_max_offse avi_chunk_indx_t *p_indx ) { demux_sys_t *p_sys = p_demux->p_sys; avi_entry_t index; p_sys->b_indexloaded = true; msg_Dbg( p_demux, "loading subindex(0x%x) %d entries", p_indx->i_indextype, p_indx->i_ent if( p_indx->i_indexsubtype == 0 ) { for( unsigned i = 0; i < p_indx->i_entriesinuse; i++ ) { index.i_flags = p_indx->idx.std[i].i_size & 0x80000000 ? 0 : AVIIF_KEYFRAME; index.i_pos = p_indx->i_baseoffset + p_indx->idx.std[i].i_offset - 8; index.i_length = p_indx->idx.std[i].i_size&0x7fffffff; index.i_lengthtotal = index.i_length; avi_index_Append( p_index, pi_max_offset, &index ); } } else if( p_indx->i_indexsubtype == AVI_INDEX_2FIELD ) { for( unsigned i = 0; i < p_indx->i_entriesinuse; i++ ) { index.i_flags = p_indx->idx.field[i].i_size & 0x80000000 ? 0 : AVIIF_KEYFRAME; index.i_pos = p_indx->i_baseoffset + p_indx->idx.field[i].i_offset - 8; index.i_length = p_indx->idx.field[i].i_size; index.i_lengthtotal = index.i_length; avi_index_Append( p_index, pi_max_offset, &index ); } } else { msg_Warn( p_demux, "unknown subtype index(0x%x)", p_indx->i_indexsubtype ); } } static void AVI_IndexLoad_indx( demux_t *p_demux, avi_index_t p_index[], uint64_t *pi_last_offset ) { demux_sys_t *p_sys = p_demux->p_sys; avi_chunk_list_t *p_riff; avi_chunk_list_t *p_hdrl; p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0, true); p_hdrl = AVI_ChunkFind( p_riff, AVIFOURCC_hdrl, 0, true ); for( unsigned i_stream = 0; i_stream < p_sys->i_track; i_stream++ ) { avi_chunk_list_t *p_strl; avi_chunk_indx_t *p_indx; p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i_stream, true ); p_indx = AVI_ChunkFind( p_strl, AVIFOURCC_indx, 0, false ); if( !p_indx ) { if( p_sys->b_odml ) msg_Warn( p_demux, "cannot find indx (misdetect/broken OpenDML " "file?)" ); continue; } if( p_indx->i_indextype == AVI_INDEX_OF_CHUNKS ) { __Parse_indx( p_demux, &p_index[i_stream], pi_last_offset, p_indx ); } else if( p_indx->i_indextype == AVI_INDEX_OF_INDEXES ) { if ( !p_sys->b_seekable ) return; avi_chunk_t ck_sub; for( unsigned i = 0; i < p_indx->i_entriesinuse; i++ ) { if( vlc_stream_Seek( p_demux->s, p_indx->idx.super[i].i_offset ) || AVI_ChunkRead( p_demux->s, &ck_sub, NULL ) ) { break; } if( ck_sub.common.i_chunk_fourcc == AVIFOURCC_indx && ck_sub.indx.i_indextype == AVI_INDEX_OF_CHUNKS ) __Parse_indx( p_demux, &p_index[i_stream], pi_last_offset, &ck_sub.indx ); AVI_ChunkClean( p_demux->s, &ck_sub ); } } else { msg_Warn( p_demux, "unknown type index(0x%x)", p_indx->i_indextype ); } } } static void AVI_IndexLoad( demux_t *p_demux ) { demux_sys_t *p_sys = p_demux->p_sys; /* Load indexes */ avi_index_t p_idx_indx[p_sys->i_track]; avi_index_t p_idx_idx1[p_sys->i_track]; for( unsigned i = 0; i < p_sys->i_track; i++ ) { avi_index_Init( &p_idx_indx[i] ); avi_index_Init( &p_idx_idx1[i] ); } uint64_t i_indx_last_pos = p_sys->i_movi_lastchunk_pos; uint64_t i_idx1_last_pos = p_sys->i_movi_lastchunk_pos; AVI_IndexLoad_indx( p_demux, p_idx_indx, &i_indx_last_pos ); if( !p_sys->b_odml ) AVI_IndexLoad_idx1( p_demux, p_idx_idx1, &i_idx1_last_pos ); /* Select the longest index */ for( unsigned i = 0; i < p_sys->i_track; i++ ) { if( p_idx_indx[i].i_size > p_idx_idx1[i].i_size ) { msg_Dbg( p_demux, "selected ODML index for stream[%u]", i ); free(p_sys->track[i]->idx.p_entry); p_sys->track[i]->idx = p_idx_indx[i]; avi_index_Clean( &p_idx_idx1[i] ); } else { msg_Dbg( p_demux, "selected standard index for stream[%u]", i ); free(p_sys->track[i]->idx.p_entry); p_sys->track[i]->idx = p_idx_idx1[i]; avi_index_Clean( &p_idx_indx[i] ); } } p_sys->i_movi_lastchunk_pos = __MAX( i_indx_last_pos, i_idx1_last_pos ); for( unsigned i = 0; i < p_sys->i_track; i++ ) { avi_index_t *p_index = &p_sys->track[i]->idx; /* Fix key flag */ bool b_key = false; for( unsigned j = 0; !b_key && j < p_index->i_size; j++ ) b_key = p_index->p_entry[j].i_flags & AVIIF_KEYFRAME; if( !b_key ) { msg_Warn( p_demux, "no key frame set for track %u", i ); for( unsigned j = 0; j < p_index->i_size; j++ ) p_index->p_entry[j].i_flags |= AVIIF_KEYFRAME; } /* */ msg_Dbg( p_demux, "stream[%d] created %d index entries", i, p_index->i_size ); } } static void AVI_IndexCreate( demux_t *p_demux ) { demux_sys_t *p_sys = p_demux->p_sys; avi_chunk_list_t *p_riff; avi_chunk_list_t *p_movi; unsigned int i_stream; uint64_t i_movi_end; uint64_t i_stream_size; vlc_tick_t i_dialog_update; vlc_dialog_id *p_dialog_id = NULL; p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0, true ); p_movi = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0, true ); if( !p_movi ) { msg_Err( p_demux, "cannot find p_movi" ); return; } if( vlc_stream_GetSize( p_demux->s, &i_stream_size ) != VLC_SUCCESS ) return; for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ ) avi_index_Init( &p_sys->track[i_stream]->idx ); i_movi_end = __MIN( p_movi->i_chunk_pos + p_movi->i_chunk_size, i_stream_size ); vlc_stream_Seek( p_demux->s, p_movi->i_chunk_pos + 12 ); msg_Warn( p_demux, "creating index from LIST-movi, will take time !" ); /* Only show dialog if AVI is > 10MB */ i_dialog_update = vlc_tick_now(); if( i_stream_size > 10000000 ) { p_dialog_id = vlc_dialog_display_progress( p_demux, false, 0.0, _("Cancel"), _("Broken or missing AVI Index"), _("Fixing AVI Index...") ); } for( ;; ) { avi_packet_t pk; /* Don't update/check dialog too often */ if( p_dialog_id != NULL && vlc_tick_now() - i_dialog_update > VLC_TICK_FROM_MS(100) ) { if( vlc_dialog_is_cancelled( p_demux, p_dialog_id ) ) break; double f_current = vlc_stream_Tell( p_demux->s ); double f_size = i_stream_size; double f_pos = f_current / f_size; vlc_dialog_update_progress( p_demux, p_dialog_id, f_pos ); i_dialog_update = vlc_tick_now(); } if( AVI_PacketGetHeader( p_demux, &pk ) ) break; if( pk.i_stream < p_sys->i_track && pk.i_cat == p_sys->track[pk.i_stream]->fmt.i_cat ) { avi_track_t *tk = p_sys->track[pk.i_stream]; avi_entry_t index; index.i_flags = AVI_GetKeyFlag(tk, pk.i_peek); index.i_pos = pk.i_pos; index.i_length = pk.i_size; index.i_lengthtotal = pk.i_size; avi_index_Append( &tk->idx, &p_sys->i_movi_lastchunk_pos, &index ); } else { switch( pk.i_fourcc ) { case AVIFOURCC_idx1: if( p_sys->b_odml ) { avi_chunk_list_t *p_sysx; p_sysx = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 1, true ); msg_Dbg( p_demux, "looking for new RIFF chunk" ); if( !p_sysx || vlc_stream_Seek( p_demux->s, p_sysx->i_chunk_pos + 24 ) ) goto print_stat; break; } goto print_stat; case AVIFOURCC_RIFF: msg_Dbg( p_demux, "new RIFF chunk found" ); break; case AVIFOURCC_rec: case AVIFOURCC_JUNK: break; default: msg_Warn( p_demux, "need resync, probably broken avi" ); if( AVI_PacketSearch( p_demux ) ) { msg_Warn( p_demux, "lost sync, abord index creation" ); goto print_stat; } } } if( ( !p_sys->b_odml && pk.i_pos + pk.i_size >= i_movi_end ) || AVI_PacketNext( p_demux ) ) { break; } } print_stat: if( p_dialog_id != NULL ) vlc_dialog_release( p_demux, p_dialog_id ); for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ ) { msg_Dbg( p_demux, "stream[%d] creating %d index entries", i_stream, p_sys->track[i_stream]->idx.i_size ); } } /* */ static void AVI_MetaLoad( demux_t *p_demux, avi_chunk_list_t *p_riff, avi_chunk_avih_t *p_avih ) { demux_sys_t *p_sys = p_demux->p_sys; vlc_meta_t *p_meta = p_sys->meta = vlc_meta_New(); if( !p_meta ) return; char buffer[200]; snprintf( buffer, sizeof(buffer), "%s%s%s%s", p_avih->i_flags&AVIF_HASINDEX ? " HAS_INDEX" : "", p_avih->i_flags&AVIF_MUSTUSEINDEX ? " MUST_USE_INDEX" : "", p_avih->i_flags&AVIF_ISINTERLEAVED ? " IS_INTERLEAVED" : "", p_avih->i_flags&AVIF_TRUSTCKTYPE ? " TRUST_CKTYPE" : "" ); vlc_meta_SetSetting( p_meta, buffer ); avi_chunk_list_t *p_info = AVI_ChunkFind( p_riff, AVIFOURCC_INFO, 0, true ); if( !p_info ) return; static const struct { vlc_fourcc_t i_id; int i_type; } p_dsc[] = { { AVIFOURCC_IART, vlc_meta_Artist }, { AVIFOURCC_ICMT, vlc_meta_Description }, { AVIFOURCC_ICOP, vlc_meta_Copyright }, { AVIFOURCC_IGNR, vlc_meta_Genre }, { AVIFOURCC_INAM, vlc_meta_Title }, { AVIFOURCC_ICRD, vlc_meta_Date }, { AVIFOURCC_ILNG, vlc_meta_Language }, { AVIFOURCC_IRTD, vlc_meta_Rating }, { AVIFOURCC_IWEB, vlc_meta_URL }, { AVIFOURCC_IPRT, vlc_meta_TrackNumber }, { AVIFOURCC_IFRM, vlc_meta_TrackTotal }, { 0, -1 } }; for( int i = 0; p_dsc[i].i_id != 0; i++ ) { avi_chunk_STRING_t *p_strz = AVI_ChunkFind( p_info, p_dsc[i].i_id, 0, false ); if( !p_strz || !p_strz->p_str ) continue; char *psz_value = FromACP( p_strz->p_str ); if( !psz_value ) continue; if( *psz_value ) vlc_meta_Set( p_meta, p_dsc[i].i_type, psz_value ); free( psz_value ); } static const vlc_fourcc_t p_extra[] = { AVIFOURCC_IARL, AVIFOURCC_ICMS, AVIFOURCC_ICRP, AVIFOURCC_IDIM, AVIFOURCC_IDPI, AVIFOURCC_IENG, AVIFOURCC_IKEY, AVIFOURCC_ILGT, AVIFOURCC_IMED, AVIFOURCC_IPLT, AVIFOURCC_IPRD, AVIFOURCC_ISBJ, AVIFOURCC_ISFT, AVIFOURCC_ISHP, AVIFOURCC_ISRC, AVIFOURCC_ISRF, AVIFOURCC_ITCH, AVIFOURCC_ISMP, AVIFOURCC_IDIT, AVIFOURCC_ISGN, AVIFOURCC_IWRI, AVIFOURCC_IPRO, AVIFOURCC_ICNM, AVIFOURCC_IPDS, AVIFOURCC_IEDT, AVIFOURCC_ICDS, AVIFOURCC_IMUS, AVIFOURCC_ISTD, AVIFOURCC_IDST, AVIFOURCC_ICNT, AVIFOURCC_ISTR, 0, }; for( int i = 0; p_extra[i] != 0; i++ ) { avi_chunk_STRING_t *p_strz = AVI_ChunkFind( p_info, p_extra[i], 0, false ); if( !p_strz || !p_strz->p_str ) continue; char *psz_value = FromACP( p_strz->p_str ); if( !psz_value ) continue; if( *psz_value ) vlc_meta_SetExtra( p_meta, p_strz->p_type, psz_value ); free( psz_value ); } } static void AVI_DvHandleAudio( demux_t *p_demux, avi_track_t *tk, block_t *p_frame ) { size_t i_offset = 80 * 6 + 80 * 16 * 3 + 3; if( p_frame->i_buffer < i_offset + 5 ) return; if( p_frame->p_buffer[i_offset] != 0x50 ) return; es_format_t fmt; dv_get_audio_format( &fmt, &p_frame->p_buffer[i_offset + 1] ); if( tk->p_es_dv_audio && tk->i_dv_audio_rate != (int)fmt.audio.i_rate ) { es_out_Del( p_demux->out, tk->p_es_dv_audio ); tk->p_es_dv_audio = NULL; } if( !tk->p_es_dv_audio ) { tk->p_es_dv_audio = es_out_Add( p_demux->out, &fmt ); tk->i_dv_audio_rate = fmt.audio.i_rate; } es_format_Clean( &fmt ); block_t *p_frame_audio = dv_extract_audio( p_frame ); if( p_frame_audio ) { if( tk->p_es_dv_audio ) es_out_Send( p_demux->out, tk->p_es_dv_audio, p_frame_audio ); else block_Release( p_frame_audio ); } } /***************************************************************************** * Subtitles *****************************************************************************/ /* Subtitles only exists in a hackish way as AVI is samples rate based and does not provide any way for variable rate or variable duration content. Only 2 subtitles formats: - Xsub from DivX Samples are prefixed with a text formatted timestamp containing start and stop times. Track index provides sample location. Chunk position is meaningless. All timings are within sample. * - Txt Samples are stored in a similar format as Xsub, but regrouped in a single sample with metadata header. Location found using track index. Those are extracted and exposed as attachment. This track has to be ignored for playback. */ static void AVI_ExtractSubtitle( demux_t *p_demux, unsigned int i_stream, avi_chunk_list_t *p_strl, avi_chunk_STRING_t *p_strn ) { demux_sys_t *p_sys = p_demux->p_sys; block_t *p_block = NULL; input_attachment_t *p_attachment = NULL; char *psz_description = NULL; avi_chunk_indx_t *p_indx = NULL; avi_chunk_t ck; AVI_ChunkInit( &ck, p_strl->i_depth + 1 ); int64_t i_position; unsigned i_size; if( !p_sys->b_seekable ) goto exit; p_indx = AVI_ChunkFind( p_strl, AVIFOURCC_indx, 0, false ); if( p_indx ) { if( p_indx->i_indextype == AVI_INDEX_OF_INDEXES && p_indx->i_entriesinuse > 0 ) { if( vlc_stream_Seek( p_demux->s, p_indx->idx.super[0].i_offset ) || AVI_ChunkRead( p_demux->s, &ck, NULL ) || ck.common.i_chunk_fourcc != AVIFOURCC_indx ) goto exit; p_indx = &ck.indx; } if( p_indx->i_indextype != AVI_INDEX_OF_CHUNKS || p_indx->i_entriesinuse != 1 || p_indx->i_indexsubtype != 0 ) goto exit; i_position = p_indx->i_baseoffset + p_indx->idx.std[0].i_offset - 8; i_size = (p_indx->idx.std[0].i_size & 0x7fffffff) + 8; } else { avi_chunk_idx1_t *p_idx1; uint64_t i_offset; if( AVI_IndexFind_idx1( p_demux, &p_idx1, &i_offset ) ) goto exit; i_size = 0; for( unsigned i = 0; i < p_idx1->i_entry_count; i++ ) { const idx1_entry_t *e = &p_idx1->entry[i]; enum es_format_category_e i_cat; unsigned i_stream_idx; AVI_ParseStreamHeader( e->i_fourcc, &i_stream_idx, &i_cat ); if( i_cat == SPU_ES && i_stream_idx == i_stream ) { i_position = e->i_pos + i_offset; i_size = e->i_length + 8; break; } } if( i_size == 0 ) goto exit; } /* */ if( i_size > 10000000 ) { msg_Dbg( p_demux, "Attached subtitle too big: %u", i_size ); goto exit; } if( vlc_stream_Seek( p_demux->s, i_position ) ) goto exit; p_block = vlc_stream_Block( p_demux->s, i_size ); if( !p_block ) goto exit; /* Parse packet header */ const uint8_t *p = p_block->p_buffer; i_size = p_block->i_buffer; if( i_size < (8+11) || p[2] != 't' || p[3] != 'x' ) goto exit; p += 8; i_size -= 8; /* Parse subtitle chunk header */ if( memcmp( p, "GAB2", 4 ) || p[4] != 0x00 || GetWLE( &p[5] ) != 0x2 ) goto exit; const unsigned i_name = GetDWLE( &p[7] ); if( i_size - 11 < i_name ) goto exit; if( i_name > 0 ) psz_description = FromCharset( "UTF-16LE", &p[11], i_name ); p += 11 + i_name; i_size -= 11 + i_name; if( i_size < 6 || GetWLE( &p[0] ) != 0x04 ) goto exit; const unsigned i_payload = GetDWLE( &p[2] ); if( i_size - 6 < i_payload || i_payload == 0 ) goto exit; p += 6; i_size -= 6; if( !psz_description ) psz_description = p_strn && p_strn->p_str ? FromACP( p_strn->p_str ) : NULL; char *psz_name; if( asprintf( &psz_name, "subtitle%d.srt", p_sys->i_attachment ) <= 0 ) psz_name = NULL; p_attachment = vlc_input_attachment_New( psz_name, "application/x-srt", psz_description, p, i_payload ); if( p_attachment ) TAB_APPEND( p_sys->i_attachment, p_sys->attachment, p_attachment ); free( psz_name ); exit: free( psz_description ); if( p_block ) block_Release( p_block ); if( p_attachment ) msg_Dbg( p_demux, "Loaded an embedded subtitle" ); else msg_Warn( p_demux, "Failed to load an embedded subtitle" ); AVI_ChunkClean( p_demux->s, &ck ); } static avi_track_t * AVI_GetVideoTrackForXsub( demux_sys_t *p_sys ) { for( unsigned i = 0; i < p_sys->i_track; i++ ) { avi_track_t *p_stream = p_sys->track[i]; if( p_stream->b_activated && p_stream->fmt.i_cat == VIDEO_ES && p_stream->idx.i_size ) return p_stream; } return NULL; } static int AVI_SeekSubtitleTrack( demux_sys_t *p_sys, avi_track_t *tk ) { if( tk->fmt.i_codec != FOURCC_DXSB ) return VLC_EGENERIC; const avi_track_t *p_videotk = AVI_GetVideoTrackForXsub( p_sys ); if( !p_videotk ) return VLC_EGENERIC; /* Seek into SPU index using video track */ unsigned idx = p_videotk->i_idxposc < p_videotk->idx.i_size ? p_videotk->i_idxposc : p_videotk->idx.i_size - 1; uint64_t i_pos = p_videotk->idx.p_entry[idx].i_pos; /* invalidate sample timestamp */ tk->i_next_embedded_time = VLC_TICK_INVALID; tk->i_last_embedded_endtime = VLC_TICK_INVALID; for( tk->i_idxposc = 0; tk->i_idxposc<tk->idx.i_size; tk->i_idxposc++ ) { /* match next pos, or closest -256KB sample */ if( tk->idx.p_entry[tk->i_idxposc].i_pos > i_pos ) { tk->b_eof = false; break; } else if( tk->idx.p_entry[tk->i_idxposc].i_pos + (1 << 28) <= i_pos ) { tk->b_eof = false; } } tk->b_eof = tk->i_idxposc == tk->idx.i_size; if(!tk->b_eof) tk->i_next_block_flags |= BLOCK_FLAG_DISCONTINUITY; return VLC_SUCCESS; } /***************************************************************************** * Stream management *****************************************************************************/ static bool AVI_TrackStopFinishedStreams( demux_t *p_demux ) { demux_sys_t *p_sys = p_demux->p_sys; unsigned int i; bool b_end = true; for( i = 0; i < p_sys->i_track; i++ ) { avi_track_t *tk = p_sys->track[i]; if( tk->i_idxposc >= tk->idx.i_size ) { tk->b_eof = true; } else { b_end = false; } } return( b_end ); } /**************************************************************************** * AVI_MovieGetLength give max streams length in ticks ****************************************************************************/ static vlc_tick_t AVI_MovieGetLength( demux_t *p_demux ) { demux_sys_t *p_sys = p_demux->p_sys; vlc_tick_t i_maxlength = 0; unsigned int i; for( i = 0; i < p_sys->i_track; i++ ) { avi_track_t *tk = p_sys->track[i]; vlc_tick_t i_length; /* fix length for each stream */ if( tk->idx.i_size < 1 || !tk->idx.p_entry ) { continue; } if( tk->i_samplesize ) { i_length = AVI_GetDPTS( tk, tk->idx.p_entry[tk->idx.i_size-1].i_lengthtotal + tk->idx.p_entry[tk->idx.i_size-1].i_length ); } else { i_length = AVI_GetDPTS( tk, tk->idx.i_size ); } msg_Dbg( p_demux, "stream[%d] length:%"PRId64" (based on index)", i, SEC_FROM_VLC_TICK(i_length) ); i_maxlength = __MAX( i_maxlength, i_length ); } return i_maxlength; }
¤ Dauer der Verarbeitung: 0.63 Sekunden (vorverarbeitet am 2026-11-04) ¤*© Formatika GbR, Deutschland |
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2026-11-01