/***************************************************************************** * demux.c: demuxer using libavformat ***************************************************************************** * Copyright (C) 2004-2009 VLC authors and VideoLAN * $Id$ * * Authors: Laurent Aimar * Gildas Bazin * * 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 #include #include #include #include #include #include #include #include "../../codec/avcodec/avcodec.h" #include "../../codec/avcodec/chroma.h" #include "../../codec/avcodec/avcommon.h" #include "avformat.h" #include "../xiph.h" #include "../vobsub.h" /* Support for deprecated APIs */ #if LIBAVFORMAT_VERSION_MAJOR < 54 # define AVDictionaryEntry AVMetadataTag # define av_dict_get av_metadata_get #endif //#define AVFORMAT_DEBUG 1 # define HAVE_AVUTIL_CODEC_ATTACHMENT 1 /***************************************************************************** * demux_sys_t: demux descriptor *****************************************************************************/ struct demux_sys_t { int io_buffer_size; uint8_t *io_buffer; AVInputFormat *fmt; AVFormatContext *ic; int i_tk; es_out_id_t **tk; int64_t *tk_pcr; int64_t i_pcr; unsigned i_ssa_order; int i_attachments; input_attachment_t **attachments; /* Only one title with seekpoints possible atm. */ input_title_t *p_title; }; /***************************************************************************** * Local prototypes *****************************************************************************/ static int Demux ( demux_t *p_demux ); static int Control( demux_t *p_demux, int i_query, va_list args ); static int IORead( void *opaque, uint8_t *buf, int buf_size ); static int64_t IOSeek( void *opaque, int64_t offset, int whence ); static block_t *BuildSsaFrame( const AVPacket *p_pkt, unsigned i_order ); static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time ); static void ResetTime( demux_t *p_demux, int64_t i_time ); /***************************************************************************** * Open *****************************************************************************/ int OpenDemux( vlc_object_t *p_this ) { demux_t *p_demux = (demux_t*)p_this; demux_sys_t *p_sys; AVProbeData pd; AVInputFormat *fmt = NULL; unsigned int i; int64_t i_start_time = -1; bool b_can_seek; char *psz_url; int error; if( p_demux->psz_file ) psz_url = strdup( p_demux->psz_file ); else { if( asprintf( &psz_url, "%s://%s", p_demux->psz_access, p_demux->psz_location ) == -1) return VLC_ENOMEM; } msg_Dbg( p_demux, "trying url: %s", psz_url ); /* Init Probe data */ pd.filename = psz_url; if( ( pd.buf_size = stream_Peek( p_demux->s, (const uint8_t**)&pd.buf, 2048 + 213 ) ) <= 0 ) { free( psz_url ); msg_Warn( p_demux, "cannot peek" ); return VLC_EGENERIC; } stream_Control( p_demux->s, STREAM_CAN_SEEK, &b_can_seek ); vlc_init_avformat(); char *psz_format = var_InheritString( p_this, "avformat-format" ); if( psz_format ) { if( (fmt = av_find_input_format(psz_format)) ) msg_Dbg( p_demux, "forcing format: %s", fmt->name ); free( psz_format ); } /* Guess format */ if( !fmt && !( fmt = av_probe_input_format( &pd, 1 ) ) ) { msg_Dbg( p_demux, "couldn't guess format" ); free( psz_url ); return VLC_EGENERIC; } if( !p_demux->b_force ) { static const char ppsz_blacklist[][16] = { /* Don't handle MPEG unless forced */ "mpeg", "vcd", "vob", "mpegts", /* libavformat's redirector won't work */ "redir", "sdp", /* Don't handle subtitles format */ "ass", "srt", "microdvd", "" }; for( int i = 0; *ppsz_blacklist[i]; i++ ) { if( !strcmp( fmt->name, ppsz_blacklist[i] ) ) { free( psz_url ); return VLC_EGENERIC; } } } /* Don't trigger false alarms on bin files */ if( !p_demux->b_force && !strcmp( fmt->name, "psxstr" ) ) { int i_len; if( !p_demux->psz_file ) { free( psz_url ); return VLC_EGENERIC; } i_len = strlen( p_demux->psz_file ); if( i_len < 4 ) { free( psz_url ); return VLC_EGENERIC; } if( strcasecmp( &p_demux->psz_file[i_len - 4], ".str" ) && strcasecmp( &p_demux->psz_file[i_len - 4], ".xai" ) && strcasecmp( &p_demux->psz_file[i_len - 3], ".xa" ) ) { free( psz_url ); return VLC_EGENERIC; } } msg_Dbg( p_demux, "detected format: %s", fmt->name ); /* Fill p_demux fields */ p_demux->pf_demux = Demux; p_demux->pf_control = Control; p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) ); p_sys->ic = 0; p_sys->fmt = fmt; p_sys->i_tk = 0; p_sys->tk = NULL; p_sys->tk_pcr = NULL; p_sys->i_ssa_order = 0; TAB_INIT( p_sys->i_attachments, p_sys->attachments); p_sys->p_title = NULL; /* Create I/O wrapper */ p_sys->io_buffer_size = 32768; /* FIXME */ p_sys->io_buffer = malloc( p_sys->io_buffer_size ); p_sys->ic = avformat_alloc_context(); p_sys->ic->pb = avio_alloc_context( p_sys->io_buffer, p_sys->io_buffer_size, 0, p_demux, IORead, NULL, IOSeek ); p_sys->ic->pb->seekable = b_can_seek ? AVIO_SEEKABLE_NORMAL : 0; error = avformat_open_input(&p_sys->ic, psz_url, p_sys->fmt, NULL); if( error < 0 ) { errno = AVUNERROR(error); msg_Err( p_demux, "Could not open %s: %m", psz_url ); p_sys->ic = NULL; free( psz_url ); CloseDemux( p_this ); return VLC_EGENERIC; } free( psz_url ); #if LIBAVFORMAT_VERSION_INT >= ((53<<16)+(26<<8)+0) char *psz_opts = var_InheritString( p_demux, "avformat-options" ); AVDictionary *options[p_sys->ic->nb_streams ? p_sys->ic->nb_streams : 1]; options[0] = NULL; unsigned int nb_streams = p_sys->ic->nb_streams; for (unsigned i = 1; i < nb_streams; i++) options[i] = NULL; if (psz_opts && *psz_opts) { options[0] = vlc_av_get_options(psz_opts); for (unsigned i = 1; i < nb_streams; i++) { av_dict_copy(&options[i], options[0], 0); } } free(psz_opts); vlc_avcodec_lock(); /* avformat calls avcodec behind our back!!! */ error = avformat_find_stream_info( p_sys->ic, options ); /* FIXME: what if nb_streams change after that call? */ vlc_avcodec_unlock(); AVDictionaryEntry *t = NULL; while ((t = av_dict_get(options[0], "", t, AV_DICT_IGNORE_SUFFIX))) { msg_Err( p_demux, "Unknown option \"%s\"", t->key ); } av_dict_free(&options[0]); for (unsigned i = 1; i < nb_streams; i++) { av_dict_free(&options[i]); } #else vlc_avcodec_lock(); /* avformat calls avcodec behind our back!!! */ error = av_find_stream_info( p_sys->ic ); vlc_avcodec_unlock(); #endif if( error < 0 ) { errno = AVUNERROR(error); msg_Warn( p_demux, "Could not find stream info: %m" ); } for( i = 0; i < p_sys->ic->nb_streams; i++ ) { AVStream *s = p_sys->ic->streams[i]; AVCodecContext *cc = s->codec; es_out_id_t *es; es_format_t fmt; vlc_fourcc_t fcc; const char *psz_type = "unknown"; if( !GetVlcFourcc( cc->codec_id, NULL, &fcc, NULL ) ) fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' ); #if LIBAVFORMAT_VERSION_INT >= ((54<<16)+(2<<8)+0) /* Do not use the cover art as a stream */ if( s->disposition == AV_DISPOSITION_ATTACHED_PIC ) continue; #endif switch( cc->codec_type ) { case AVMEDIA_TYPE_AUDIO: es_format_Init( &fmt, AUDIO_ES, fcc ); fmt.i_bitrate = cc->bit_rate; fmt.audio.i_channels = cc->channels; fmt.audio.i_rate = cc->sample_rate; fmt.audio.i_bitspersample = cc->bits_per_coded_sample; fmt.audio.i_blockalign = cc->block_align; psz_type = "audio"; break; case AVMEDIA_TYPE_VIDEO: es_format_Init( &fmt, VIDEO_ES, fcc ); fmt.video.i_bits_per_pixel = cc->bits_per_coded_sample; /* Special case for raw video data */ if( cc->codec_id == AV_CODEC_ID_RAWVIDEO ) { msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt ); if( GetVlcChroma( &fmt.video, cc->pix_fmt ) != VLC_SUCCESS) { msg_Err( p_demux, "was unable to find a FourCC match for raw video" ); } else fmt.i_codec = fmt.video.i_chroma; } /* We need this for the h264 packetizer */ else if( cc->codec_id == AV_CODEC_ID_H264 && ( p_sys->fmt == av_find_input_format("flv") || p_sys->fmt == av_find_input_format("matroska") || p_sys->fmt == av_find_input_format("mp4") ) ) fmt.i_original_fourcc = VLC_FOURCC( 'a', 'v', 'c', '1' ); fmt.video.i_width = cc->width; fmt.video.i_height = cc->height; #if LIBAVCODEC_VERSION_MAJOR < 54 if( cc->palctrl ) { fmt.video.p_palette = malloc( sizeof(video_palette_t) ); *fmt.video.p_palette = *(video_palette_t *)cc->palctrl; } #else # warning FIXME: implement palette transmission #endif psz_type = "video"; fmt.video.i_frame_rate = cc->time_base.den; fmt.video.i_frame_rate_base = cc->time_base.num * __MAX( cc->ticks_per_frame, 1 ); fmt.video.i_sar_num = s->sample_aspect_ratio.num; if (s->sample_aspect_ratio.num > 0) fmt.video.i_sar_den = s->sample_aspect_ratio.den; else fmt.video.i_sar_den = 0; break; case AVMEDIA_TYPE_SUBTITLE: es_format_Init( &fmt, SPU_ES, fcc ); if( strncmp( p_sys->ic->iformat->name, "matroska", 8 ) == 0 && cc->codec_id == AV_CODEC_ID_DVD_SUBTITLE && cc->extradata != NULL && cc->extradata_size > 0 ) { char *psz_start; char *psz_buf = malloc( cc->extradata_size + 1); if( psz_buf != NULL ) { memcpy( psz_buf, cc->extradata , cc->extradata_size ); psz_buf[cc->extradata_size] = '\0'; psz_start = strstr( psz_buf, "size:" ); if( psz_start && vobsub_size_parse( psz_start, &fmt.subs.spu.i_original_frame_width, &fmt.subs.spu.i_original_frame_height ) == VLC_SUCCESS ) { msg_Dbg( p_demux, "original frame size: %dx%d", fmt.subs.spu.i_original_frame_width, fmt.subs.spu.i_original_frame_height ); } else { msg_Warn( p_demux, "reading original frame size failed" ); } psz_start = strstr( psz_buf, "palette:" ); if( psz_start && vobsub_palette_parse( psz_start, &fmt.subs.spu.palette[1] ) == VLC_SUCCESS ) { fmt.subs.spu.palette[0] = 0xBeef; msg_Dbg( p_demux, "vobsub palette read" ); } else { msg_Warn( p_demux, "reading original palette failed" ); } free( psz_buf ); } } psz_type = "subtitle"; break; default: es_format_Init( &fmt, UNKNOWN_ES, 0 ); #ifdef HAVE_AVUTIL_CODEC_ATTACHMENT if( cc->codec_type == AVMEDIA_TYPE_ATTACHMENT ) { input_attachment_t *p_attachment; psz_type = "attachment"; if( cc->codec_id == AV_CODEC_ID_TTF ) { AVDictionaryEntry *filename = av_dict_get( s->metadata, "filename", NULL, 0 ); if( filename && filename->value ) { p_attachment = vlc_input_attachment_New( filename->value, "application/x-truetype-font", NULL, cc->extradata, (int)cc->extradata_size ); TAB_APPEND( p_sys->i_attachments, p_sys->attachments, p_attachment ); } } else msg_Warn( p_demux, "unsupported attachment type (%u) in avformat demux", cc->codec_id ); } else #endif { if( cc->codec_type == AVMEDIA_TYPE_DATA ) psz_type = "data"; msg_Warn( p_demux, "unsupported track type (%u:%u) in avformat demux", cc->codec_type, cc->codec_id ); } break; } AVDictionaryEntry *language = av_dict_get( s->metadata, "language", NULL, 0 ); if ( language && language->value ) fmt.psz_language = strdup( language->value ); if( s->disposition & AV_DISPOSITION_DEFAULT ) fmt.i_priority = 1000; #ifdef HAVE_AVUTIL_CODEC_ATTACHMENT if( cc->codec_type != AVMEDIA_TYPE_ATTACHMENT ) #endif if( cc->codec_type != AVMEDIA_TYPE_DATA ) { const bool b_ogg = !strcmp( p_sys->fmt->name, "ogg" ); const uint8_t *p_extra = cc->extradata; unsigned i_extra = cc->extradata_size; if( cc->codec_id == AV_CODEC_ID_THEORA && b_ogg ) { unsigned pi_size[3]; const void *pp_data[3]; unsigned i_count; for( i_count = 0; i_count < 3; i_count++ ) { if( i_extra < 2 ) break; pi_size[i_count] = GetWBE( p_extra ); pp_data[i_count] = &p_extra[2]; if( i_extra < pi_size[i_count] + 2 ) break; p_extra += 2 + pi_size[i_count]; i_extra -= 2 + pi_size[i_count]; } if( i_count > 0 && xiph_PackHeaders( &fmt.i_extra, &fmt.p_extra, pi_size, pp_data, i_count ) ) { fmt.i_extra = 0; fmt.p_extra = NULL; } } else if( cc->codec_id == AV_CODEC_ID_SPEEX && b_ogg ) { const uint8_t p_dummy_comment[] = { 0, 0, 0, 0, 0, 0, 0, 0, }; unsigned pi_size[2]; const void *pp_data[2]; pi_size[0] = i_extra; pp_data[0] = p_extra; pi_size[1] = sizeof(p_dummy_comment); pp_data[1] = p_dummy_comment; if( pi_size[0] > 0 && xiph_PackHeaders( &fmt.i_extra, &fmt.p_extra, pi_size, pp_data, 2 ) ) { fmt.i_extra = 0; fmt.p_extra = NULL; } } else if( cc->extradata_size > 0 ) { fmt.p_extra = malloc( i_extra ); if( fmt.p_extra ) { fmt.i_extra = i_extra; memcpy( fmt.p_extra, p_extra, i_extra ); } } es = es_out_Add( p_demux->out, &fmt ); if( s->disposition & AV_DISPOSITION_DEFAULT ) es_out_Control( p_demux->out, ES_OUT_SET_ES_DEFAULT, es ); es_format_Clean( &fmt ); msg_Dbg( p_demux, "adding es: %s codec = %4.4s (%d)", psz_type, (char*)&fcc, cc->codec_id ); TAB_APPEND( p_sys->i_tk, p_sys->tk, es ); } } p_sys->tk_pcr = calloc( p_sys->i_tk, sizeof(*p_sys->tk_pcr) ); if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) i_start_time = p_sys->ic->start_time * 1000000 / AV_TIME_BASE; msg_Dbg( p_demux, "AVFormat supported stream" ); msg_Dbg( p_demux, " - format = %s (%s)", p_sys->fmt->name, p_sys->fmt->long_name ); msg_Dbg( p_demux, " - start time = %"PRId64, i_start_time ); msg_Dbg( p_demux, " - duration = %"PRId64, ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ? p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 ); if( p_sys->ic->nb_chapters > 0 ) { p_sys->p_title = vlc_input_title_New(); p_sys->p_title->i_length = p_sys->ic->duration * 1000000 / AV_TIME_BASE; } for( i = 0; i < p_sys->ic->nb_chapters; i++ ) { seekpoint_t *s = vlc_seekpoint_New(); AVDictionaryEntry *title = av_dict_get( p_sys->ic->metadata, "title", NULL, 0); if( title && title->value ) { s->psz_name = strdup( title->value ); EnsureUTF8( s->psz_name ); msg_Dbg( p_demux, " - chapter %d: %s", i, s->psz_name ); } s->i_time_offset = p_sys->ic->chapters[i]->start * 1000000 * p_sys->ic->chapters[i]->time_base.num / p_sys->ic->chapters[i]->time_base.den - (i_start_time != -1 ? i_start_time : 0 ); TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s ); } ResetTime( p_demux, 0 ); return VLC_SUCCESS; } /***************************************************************************** * Close *****************************************************************************/ void CloseDemux( vlc_object_t *p_this ) { demux_t *p_demux = (demux_t*)p_this; demux_sys_t *p_sys = p_demux->p_sys; FREENULL( p_sys->tk ); free( p_sys->tk_pcr ); if( p_sys->ic ) { av_free( p_sys->ic->pb ); #if LIBAVFORMAT_VERSION_INT >= ((53<<16)+(26<<8)+0) avformat_close_input( &p_sys->ic ); #else av_close_input_stream( p_sys->ic ); #endif } for( int i = 0; i < p_sys->i_attachments; i++ ) free( p_sys->attachments[i] ); TAB_CLEAN( p_sys->i_attachments, p_sys->attachments); if( p_sys->p_title ) vlc_input_title_Delete( p_sys->p_title ); free( p_sys->io_buffer ); free( p_sys ); } /***************************************************************************** * Demux: *****************************************************************************/ static int Demux( demux_t *p_demux ) { demux_sys_t *p_sys = p_demux->p_sys; AVPacket pkt; block_t *p_frame; int64_t i_start_time; /* Read a frame */ int i_av_ret = av_read_frame( p_sys->ic, &pkt ); if( i_av_ret ) { /* Avoid EOF if av_read_frame returns AVERROR(EAGAIN) */ if( i_av_ret == AVERROR(EAGAIN) ) return 1; return 0; } if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk ) { av_free_packet( &pkt ); return 1; } const AVStream *p_stream = p_sys->ic->streams[pkt.stream_index]; if( p_stream->time_base.den <= 0 ) { msg_Warn( p_demux, "Invalid time base for the stream %d", pkt.stream_index ); av_free_packet( &pkt ); return 1; } if( p_stream->codec->codec_id == AV_CODEC_ID_SSA ) { p_frame = BuildSsaFrame( &pkt, p_sys->i_ssa_order++ ); if( !p_frame ) { av_free_packet( &pkt ); return 1; } } else { if( ( p_frame = block_Alloc( pkt.size ) ) == NULL ) { av_free_packet( &pkt ); return 0; } memcpy( p_frame->p_buffer, pkt.data, pkt.size ); } if( pkt.flags & AV_PKT_FLAG_KEY ) p_frame->i_flags |= BLOCK_FLAG_TYPE_I; /* Used to avoid timestamps overlow */ lldiv_t q; if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) { q = lldiv( p_sys->ic->start_time, AV_TIME_BASE); i_start_time = q.quot * (int64_t)1000000 + q.rem * (int64_t)1000000 / AV_TIME_BASE; } else i_start_time = 0; if( pkt.dts == (int64_t)AV_NOPTS_VALUE ) p_frame->i_dts = VLC_TS_INVALID; else { q = lldiv( pkt.dts, p_stream->time_base.den ); p_frame->i_dts = q.quot * (int64_t)1000000 * p_stream->time_base.num + q.rem * (int64_t)1000000 * p_stream->time_base.num / p_stream->time_base.den - i_start_time + VLC_TS_0; } if( pkt.pts == (int64_t)AV_NOPTS_VALUE ) p_frame->i_pts = VLC_TS_INVALID; else { q = lldiv( pkt.pts, p_stream->time_base.den ); p_frame->i_pts = q.quot * (int64_t)1000000 * p_stream->time_base.num + q.rem * (int64_t)1000000 * p_stream->time_base.num / p_stream->time_base.den - i_start_time + VLC_TS_0; } if( pkt.duration > 0 && p_frame->i_length <= 0 ) p_frame->i_length = pkt.duration * 1000000 * p_stream->time_base.num / p_stream->time_base.den; if( pkt.dts != (int64_t)AV_NOPTS_VALUE && pkt.dts == pkt.pts && p_stream->codec->codec_type == AVMEDIA_TYPE_VIDEO ) { /* Add here notoriously bugged file formats/samples regarding PTS */ if( !strcmp( p_sys->fmt->name, "flv" ) ) p_frame->i_pts = VLC_TS_INVALID; } #ifdef AVFORMAT_DEBUG msg_Dbg( p_demux, "tk[%d] dts=%"PRId64" pts=%"PRId64, pkt.stream_index, p_frame->i_dts, p_frame->i_pts ); #endif if( p_frame->i_dts > VLC_TS_INVALID ) p_sys->tk_pcr[pkt.stream_index] = p_frame->i_dts; int64_t i_ts_max = INT64_MIN; for( int i = 0; i < p_sys->i_tk; i++ ) i_ts_max = __MAX( i_ts_max, p_sys->tk_pcr[i] ); int64_t i_ts_min = INT64_MAX; for( int i = 0; i < p_sys->i_tk; i++ ) { if( p_sys->tk_pcr[i] > VLC_TS_INVALID && p_sys->tk_pcr[i] + 10 * CLOCK_FREQ >= i_ts_max ) i_ts_min = __MIN( i_ts_min, p_sys->tk_pcr[i] ); } if( i_ts_min >= p_sys->i_pcr ) { p_sys->i_pcr = i_ts_min; es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr ); UpdateSeekPoint( p_demux, p_sys->i_pcr ); } es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame ); av_free_packet( &pkt ); return 1; } static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time ) { demux_sys_t *p_sys = p_demux->p_sys; int i; if( !p_sys->p_title ) return; for( i = 0; i < p_sys->p_title->i_seekpoint; i++ ) { if( i_time < p_sys->p_title->seekpoint[i]->i_time_offset ) break; } i--; if( i != p_demux->info.i_seekpoint && i >= 0 ) { p_demux->info.i_seekpoint = i; p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT; } } static void ResetTime( demux_t *p_demux, int64_t i_time ) { demux_sys_t *p_sys = p_demux->p_sys; if( p_sys->ic->start_time == (int64_t)AV_NOPTS_VALUE || i_time < 0 ) i_time = VLC_TS_INVALID; else if( i_time == 0 ) i_time = 1; p_sys->i_pcr = i_time; for( int i = 0; i < p_sys->i_tk; i++ ) p_sys->tk_pcr[i] = i_time; if( i_time > VLC_TS_INVALID ) { es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, i_time ); UpdateSeekPoint( p_demux, i_time ); } } static block_t *BuildSsaFrame( const AVPacket *p_pkt, unsigned i_order ) { if( p_pkt->size <= 0 ) return NULL; char buffer[256]; const size_t i_buffer_size = __MIN( (int)sizeof(buffer) - 1, p_pkt->size ); memcpy( buffer, p_pkt->data, i_buffer_size ); buffer[i_buffer_size] = '\0'; /* */ int i_layer; int h0, m0, s0, c0; int h1, m1, s1, c1; int i_position = 0; if( sscanf( buffer, "Dialogue: %d,%d:%d:%d.%d,%d:%d:%d.%d,%n", &i_layer, &h0, &m0, &s0, &c0, &h1, &m1, &s1, &c1, &i_position ) < 9 ) return NULL; if( i_position <= 0 || (unsigned)i_position >= i_buffer_size ) return NULL; char *p; if( asprintf( &p, "%u,%d,%.*s", i_order, i_layer, p_pkt->size - i_position, p_pkt->data + i_position ) < 0 ) return NULL; block_t *p_frame = block_heap_Alloc( p, strlen(p) + 1 ); if( p_frame ) p_frame->i_length = CLOCK_FREQ * ((h1-h0) * 3600 + (m1-m0) * 60 + (s1-s0) * 1) + CLOCK_FREQ * (c1-c0) / 100; return p_frame; } /***************************************************************************** * Control: *****************************************************************************/ static int Control( demux_t *p_demux, int i_query, va_list args ) { demux_sys_t *p_sys = p_demux->p_sys; const int64_t i_start_time = p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ? p_sys->ic->start_time : 0; double f, *pf; int64_t i64, *pi64; switch( i_query ) { case DEMUX_GET_POSITION: pf = (double*) va_arg( args, double* ); *pf = 0.0; i64 = stream_Size( p_demux->s ); if( i64 > 0 ) { double current = stream_Tell( p_demux->s ); *pf = current / (double)i64; } if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) ) { *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration; } return VLC_SUCCESS; case DEMUX_SET_POSITION: f = (double) va_arg( args, double ); i64 = p_sys->ic->duration * f + i_start_time; msg_Warn( p_demux, "DEMUX_SET_POSITION: %"PRId64, i64 ); /* If we have a duration, we prefer to seek by time but if we don't, or if the seek fails, try BYTE seeking */ if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE || (av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BACKWARD ) < 0) ) { int64_t i_size = stream_Size( p_demux->s ); i64 = (i_size * f); msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: %"PRId64, i64 ); if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 ) return VLC_EGENERIC; ResetTime( p_demux, -1 ); } else { ResetTime( p_demux, i64 - i_start_time ); } return VLC_SUCCESS; case DEMUX_GET_LENGTH: pi64 = (int64_t*)va_arg( args, int64_t * ); if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) *pi64 = p_sys->ic->duration * 1000000 / AV_TIME_BASE; else *pi64 = 0; return VLC_SUCCESS; case DEMUX_GET_TIME: pi64 = (int64_t*)va_arg( args, int64_t * ); *pi64 = p_sys->i_pcr; return VLC_SUCCESS; case DEMUX_SET_TIME: { i64 = (int64_t)va_arg( args, int64_t ); i64 = i64 *AV_TIME_BASE / 1000000 + i_start_time; msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 ); if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BACKWARD ) < 0 ) { return VLC_EGENERIC; } ResetTime( p_demux, i64 - i_start_time ); return VLC_SUCCESS; } case DEMUX_HAS_UNSUPPORTED_META: { bool *pb_bool = (bool*)va_arg( args, bool* ); *pb_bool = true; return VLC_SUCCESS; } case DEMUX_GET_META: { static const char names[][10] = { [vlc_meta_Title] = "title", [vlc_meta_Artist] = "artist", [vlc_meta_Genre] = "genre", [vlc_meta_Copyright] = "copyright", [vlc_meta_Album] = "album", //[vlc_meta_TrackNumber] -- TODO: parse number/total value [vlc_meta_Description] = "comment", //[vlc_meta_Rating] [vlc_meta_Date] = "date", [vlc_meta_Setting] = "encoder", //[vlc_meta_URL] [vlc_meta_Language] = "language", //[vlc_meta_NowPlaying] [vlc_meta_Publisher] = "publisher", [vlc_meta_EncodedBy] = "encoded_by", //[vlc_meta_ArtworkURL] //[vlc_meta_TrackID] //[vlc_meta_TrackTotal] }; vlc_meta_t *p_meta = va_arg( args, vlc_meta_t * ); AVDictionary *dict = p_sys->ic->metadata; for( unsigned i = 0; i < sizeof(names) / sizeof(*names); i++) { if( !names[i][0] ) continue; AVDictionaryEntry *e = av_dict_get( dict, names[i], NULL, 0 ); if( e != NULL && e->value != NULL && IsUTF8(e->value) ) vlc_meta_Set( p_meta, i, e->value ); } return VLC_SUCCESS; } case DEMUX_GET_ATTACHMENTS: { input_attachment_t ***ppp_attach = (input_attachment_t***)va_arg( args, input_attachment_t*** ); int *pi_int = (int*)va_arg( args, int * ); int i; if( p_sys->i_attachments <= 0 ) return VLC_EGENERIC; *pi_int = p_sys->i_attachments;; *ppp_attach = malloc( sizeof(input_attachment_t*) * p_sys->i_attachments ); for( i = 0; i < p_sys->i_attachments; i++ ) (*ppp_attach)[i] = vlc_input_attachment_Duplicate( p_sys->attachments[i] ); return VLC_SUCCESS; } case DEMUX_GET_TITLE_INFO: { input_title_t ***ppp_title = (input_title_t***)va_arg( args, input_title_t*** ); int *pi_int = (int*)va_arg( args, int* ); int *pi_title_offset = (int*)va_arg( args, int* ); int *pi_seekpoint_offset = (int*)va_arg( args, int* ); if( !p_sys->p_title ) return VLC_EGENERIC; *pi_int = 1; *ppp_title = malloc( sizeof( input_title_t*) ); (*ppp_title)[0] = vlc_input_title_Duplicate( p_sys->p_title ); *pi_title_offset = 0; *pi_seekpoint_offset = 0; return VLC_SUCCESS; } case DEMUX_SET_TITLE: { const int i_title = (int)va_arg( args, int ); if( !p_sys->p_title || i_title != 0 ) return VLC_EGENERIC; return VLC_SUCCESS; } case DEMUX_SET_SEEKPOINT: { const int i_seekpoint = (int)va_arg( args, int ); if( !p_sys->p_title ) return VLC_EGENERIC; i64 = p_sys->p_title->seekpoint[i_seekpoint]->i_time_offset * AV_TIME_BASE / 1000000 + i_start_time; msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 ); if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BACKWARD ) < 0 ) { return VLC_EGENERIC; } ResetTime( p_demux, i64 - i_start_time ); return VLC_SUCCESS; } default: return VLC_EGENERIC; } } /***************************************************************************** * I/O wrappers for libavformat *****************************************************************************/ static int IORead( void *opaque, uint8_t *buf, int buf_size ) { demux_t *p_demux = opaque; if( buf_size < 0 ) return -1; int i_ret = stream_Read( p_demux->s, buf, buf_size ); return i_ret ? i_ret : -1; } static int64_t IOSeek( void *opaque, int64_t offset, int whence ) { demux_t *p_demux = opaque; int64_t i_absolute; int64_t i_size = stream_Size( p_demux->s ); #ifdef AVFORMAT_DEBUG msg_Warn( p_demux, "IOSeek offset: %"PRId64", whence: %i", offset, whence ); #endif switch( whence ) { #ifdef AVSEEK_SIZE case AVSEEK_SIZE: return i_size; #endif case SEEK_SET: i_absolute = (int64_t)offset; break; case SEEK_CUR: i_absolute = stream_Tell( p_demux->s ) + (int64_t)offset; break; case SEEK_END: i_absolute = i_size + (int64_t)offset; break; default: return -1; } if( i_absolute < 0 ) { msg_Dbg( p_demux, "Trying to seek before the beginning" ); return -1; } if( i_size > 0 && i_absolute >= i_size ) { msg_Dbg( p_demux, "Trying to seek too far : EOF?" ); return -1; } if( stream_Seek( p_demux->s, i_absolute ) ) { msg_Warn( p_demux, "we were not allowed to seek, or EOF " ); return -1; } return stream_Tell( p_demux->s ); }