/***************************************************************************** * flac.c : FLAC demux module for vlc ***************************************************************************** * Copyright (C) 2001-2008 VLC authors and VideoLAN * $Id$ * * Authors: Gildas Bazin * Laurent Aimar * * 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 /* vlc_meta_* */ #include /* vlc_input_attachment, vlc_seekpoint */ #include /* decoder_t */ #include /* EnsureUTF8 */ #include #include #include "xiph_metadata.h" /* vorbis comments */ #include "../packetizer/flac.h" /***************************************************************************** * Module descriptor *****************************************************************************/ static int Open ( vlc_object_t * ); static void Close ( vlc_object_t * ); vlc_module_begin () set_description( N_("FLAC demuxer") ) set_capability( "demux", 155 ) set_category( CAT_INPUT ) set_subcategory( SUBCAT_INPUT_DEMUX ) set_callbacks( Open, Close ) add_shortcut( "flac" ) vlc_module_end () /***************************************************************************** * Local prototypes *****************************************************************************/ static int Demux ( demux_t * ); static int Control( demux_t *, int, va_list ); static int ParseHeaders( demux_t *, es_format_t * ); typedef struct { vlc_tick_t i_time_offset; uint64_t i_byte_offset; } flac_seekpoint_t; struct demux_sys_t { bool b_start; int i_next_block_flags; es_out_id_t *p_es; block_t *p_current_block; /* Packetizer */ decoder_t *p_packetizer; vlc_meta_t *p_meta; int64_t i_pts; struct flac_stream_info stream_info; bool b_stream_info; int64_t i_length; /* Length from stream info */ uint64_t i_data_pos; /* */ int i_seekpoint; flac_seekpoint_t **seekpoint; /* title/chapters seekpoints */ int i_title_seekpoints; seekpoint_t **pp_title_seekpoints; /* */ int i_attachments; input_attachment_t **attachments; int i_cover_idx; int i_cover_score; }; #define FLAC_PACKET_SIZE 16384 #define FLAC_MAX_PREROLL (CLOCK_FREQ * 4) #define FLAC_MAX_SLOW_PREROLL (CLOCK_FREQ * 45) /***************************************************************************** * Open: initializes ES structures *****************************************************************************/ static int Open( vlc_object_t * p_this ) { demux_t *p_demux = (demux_t*)p_this; demux_sys_t *p_sys; const uint8_t *p_peek; es_format_t fmt; /* Have a peep at the show. */ if( vlc_stream_Peek( p_demux->s, &p_peek, 4 ) < 4 ) return VLC_EGENERIC; if( p_peek[0]!='f' || p_peek[1]!='L' || p_peek[2]!='a' || p_peek[3]!='C' ) { if( !p_demux->obj.force && !demux_IsContentType( p_demux, "audio/flac" ) ) return VLC_EGENERIC; /* User forced */ msg_Err( p_demux, "this doesn't look like a flac stream, " "continuing anyway" ); } p_sys = malloc( sizeof( demux_sys_t ) ); if( unlikely(p_sys == NULL) ) return VLC_ENOMEM; p_demux->pf_demux = Demux; p_demux->pf_control = Control; p_demux->p_sys = p_sys; p_sys->b_start = true; p_sys->i_next_block_flags = 0; p_sys->p_packetizer = NULL; p_sys->p_meta = NULL; p_sys->i_length = 0; p_sys->i_pts = VLC_TICK_INVALID; p_sys->b_stream_info = false; p_sys->p_es = NULL; p_sys->p_current_block = NULL; TAB_INIT( p_sys->i_seekpoint, p_sys->seekpoint ); TAB_INIT( p_sys->i_attachments, p_sys->attachments); TAB_INIT( p_sys->i_title_seekpoints, p_sys->pp_title_seekpoints ); p_sys->i_cover_idx = 0; p_sys->i_cover_score = 0; es_format_Init( &fmt, AUDIO_ES, VLC_CODEC_FLAC ); /* We need to read and store the STREAMINFO metadata into fmt extra */ if( ParseHeaders( p_demux, &fmt ) ) goto error; /* Load the FLAC packetizer */ p_sys->p_packetizer = demux_PacketizerNew( p_demux, &fmt, "flac" ); if( !p_sys->p_packetizer ) goto error; if( p_sys->i_cover_idx < p_sys->i_attachments ) { char psz_url[128]; if( !p_sys->p_meta ) p_sys->p_meta = vlc_meta_New(); snprintf( psz_url, sizeof(psz_url), "attachment://%s", p_sys->attachments[p_sys->i_cover_idx]->psz_name ); vlc_meta_Set( p_sys->p_meta, vlc_meta_ArtworkURL, psz_url ); } p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_in ); if( !p_sys->p_es ) goto error; return VLC_SUCCESS; error: Close( p_this ); return VLC_EGENERIC; } /***************************************************************************** * 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; if( p_sys->p_current_block ) block_Release( p_sys->p_current_block ); for( int i = 0; i < p_sys->i_seekpoint; i++ ) free(p_sys->seekpoint[i]); TAB_CLEAN( p_sys->i_seekpoint, p_sys->seekpoint ); for( int i = 0; i < p_sys->i_attachments; i++ ) vlc_input_attachment_Delete( p_sys->attachments[i] ); TAB_CLEAN( p_sys->i_attachments, p_sys->attachments); for( int i = 0; i < p_sys->i_title_seekpoints; i++ ) vlc_seekpoint_Delete( p_sys->pp_title_seekpoints[i] ); TAB_CLEAN( p_sys->i_title_seekpoints, p_sys->pp_title_seekpoints ); /* Delete the decoder */ if( p_sys->p_packetizer ) demux_PacketizerDestroy( p_sys->p_packetizer ); if( p_sys->p_meta ) vlc_meta_Delete( p_sys->p_meta ); free( p_sys ); } static block_t *GetPacketizedBlock( decoder_t *p_packetizer, const struct flac_stream_info *streaminfo, block_t **pp_current_block ) { block_t *p_block = p_packetizer->pf_packetize( p_packetizer, pp_current_block ); if( p_block ) { if( p_block->i_buffer >= FLAC_HEADER_SIZE_MIN && p_block->i_buffer < INT_MAX ) { struct flac_header_info headerinfo = { .i_pts = VLC_TICK_INVALID }; int i_ret = FLAC_ParseSyncInfo( p_block->p_buffer, p_block->i_buffer, streaminfo, NULL, &headerinfo ); assert( i_ret != 0 ); /* Same as packetizer */ /* Use Frame PTS, not the interpolated one */ p_block->i_dts = p_block->i_pts = headerinfo.i_pts; } } return p_block; } static void FlushPacketizer( decoder_t *p_packetizer ) { if( p_packetizer->pf_flush ) p_packetizer->pf_flush( p_packetizer ); else { block_t *p_block_out; while( (p_block_out = p_packetizer->pf_packetize( p_packetizer, NULL )) ) block_Release( p_block_out ); } } static void Reset( demux_sys_t *p_sys ) { p_sys->i_pts = VLC_TICK_INVALID; FlushPacketizer( p_sys->p_packetizer ); if( p_sys->p_current_block ) { block_Release( p_sys->p_current_block ); p_sys->p_current_block = NULL; } } static int RefineSeek( demux_t *p_demux, vlc_tick_t i_time, double i_bytemicrorate, uint64_t i_lowpos, uint64_t i_highpos ) { demux_sys_t *p_sys = p_demux->p_sys; bool b_found = false; block_t *p_block_out; block_t *p_block_in; unsigned i_frame_size = FLAC_FRAME_SIZE_MIN; bool b_canfastseek = false; (int) vlc_stream_Control( p_demux->s, STREAM_CAN_FASTSEEK, &b_canfastseek ); uint64_t i_start_pos = vlc_stream_Tell( p_demux->s ); while( !b_found ) { FlushPacketizer( p_sys->p_packetizer ); p_block_out = NULL; p_block_in = NULL; while( !p_block_out ) { if( !p_block_in ) { if( !(p_block_in = vlc_stream_Block( p_demux->s, i_frame_size )) ) break; } p_block_out = GetPacketizedBlock( p_sys->p_packetizer, p_sys->b_stream_info ? &p_sys->stream_info : NULL, &p_block_in ); } if( !p_block_out ) { if( p_block_in ) block_Release( p_block_in ); break; } if( p_block_out->i_buffer > i_frame_size ) i_frame_size = p_block_out->i_buffer; /* If we are further than wanted block */ if( p_block_out->i_dts >= i_time ) { vlc_tick_t i_diff = p_block_out->i_dts - i_time; /* Not in acceptable approximation range */ if( i_diff > CLOCK_FREQ / 10 && i_diff / i_bytemicrorate > i_frame_size ) { i_highpos = i_start_pos; i_start_pos -= ( i_diff / i_bytemicrorate ); i_start_pos = __MAX(i_start_pos, i_lowpos + i_frame_size); } else b_found = true; } else if( p_block_out->i_dts < i_time ) { vlc_tick_t i_diff = i_time - p_block_out->i_dts; /* Not in acceptable NEXT_TIME demux range */ if( i_diff >= ((b_canfastseek) ? FLAC_MAX_PREROLL : FLAC_MAX_SLOW_PREROLL) && i_diff / i_bytemicrorate > i_frame_size ) { i_lowpos = i_start_pos; i_start_pos += ( i_diff / i_bytemicrorate ); i_start_pos = __MIN(i_start_pos, i_highpos - i_frame_size); } else b_found = true; } if( p_block_out ) block_Release( p_block_out ); if( p_block_in ) block_Release( p_block_in ); if( !b_found ) { if( i_highpos < i_lowpos || i_highpos - i_lowpos <= i_frame_size ) break; if( VLC_SUCCESS != vlc_stream_Seek( p_demux->s, i_start_pos ) ) break; } } return b_found ? VLC_SUCCESS : VLC_EGENERIC; } /***************************************************************************** * Demux: reads and demuxes data packets ***************************************************************************** * Returns -1 in case of error, 0 in case of EOF, 1 otherwise *****************************************************************************/ static int Demux( demux_t *p_demux ) { demux_sys_t *p_sys = p_demux->p_sys; block_t *p_block_out; if( p_sys->p_current_block == NULL ) p_sys->p_current_block = vlc_stream_Block( p_demux->s, FLAC_PACKET_SIZE ); bool b_eof = (p_sys->p_current_block == NULL); if ( !b_eof ) { p_sys->p_current_block->i_flags = p_sys->i_next_block_flags; p_sys->i_next_block_flags = 0; p_sys->p_current_block->i_pts = p_sys->p_current_block->i_dts = p_sys->b_start ? VLC_TICK_0 : VLC_TICK_INVALID; } while( (p_block_out = GetPacketizedBlock( p_sys->p_packetizer, p_sys->b_stream_info ? &p_sys->stream_info : NULL, p_sys->p_current_block ? &p_sys->p_current_block : NULL ) ) ) { /* Only clear on output when packet is accepted as sync #17111 */ p_sys->b_start = false; while( p_block_out ) { block_t *p_next = p_block_out->p_next; p_block_out->p_next = NULL; /* set PCR */ if( unlikely(p_sys->i_pts == VLC_TICK_INVALID) ) es_out_SetPCR( p_demux->out, __MAX(p_block_out->i_dts - 1, VLC_TICK_0) ); p_sys->i_pts = p_block_out->i_dts; es_out_Send( p_demux->out, p_sys->p_es, p_block_out ); es_out_SetPCR( p_demux->out, p_sys->i_pts ); p_block_out = p_next; } break; } return b_eof ? VLC_DEMUXER_EOF : VLC_DEMUXER_SUCCESS; } /***************************************************************************** * Control: *****************************************************************************/ static int64_t ControlGetLength( demux_t *p_demux ) { demux_sys_t *p_sys = p_demux->p_sys; const uint64_t i_size = stream_Size(p_demux->s) - p_sys->i_data_pos; int64_t i_length = p_sys->i_length; int i; /* Try to fix length using seekpoint and current size for truncated file */ for( i = p_sys->i_seekpoint-1; i >= 0; i-- ) { flac_seekpoint_t *s = p_sys->seekpoint[i]; if( s->i_byte_offset <= i_size ) { if( i+1 < p_sys->i_seekpoint ) { /* Broken file */ flac_seekpoint_t *n = p_sys->seekpoint[i+1]; assert( n->i_byte_offset != s->i_byte_offset); /* Should be ensured by ParseSeekTable */ i_length = s->i_time_offset + (n->i_time_offset-s->i_time_offset) * (i_size-s->i_byte_offset) / (n->i_byte_offset-s->i_byte_offset); } break; } } return i_length; } static int64_t ControlGetTime( demux_t *p_demux ) { demux_sys_t *p_sys = p_demux->p_sys; return p_sys->i_pts; } static int ControlSetTime( demux_t *p_demux, int64_t i_time ) { demux_sys_t *p_sys = p_demux->p_sys; bool b_seekable; int i; /* */ vlc_stream_Control( p_demux->s, STREAM_CAN_SEEK, &b_seekable ); if( !b_seekable ) return VLC_EGENERIC; const vlc_tick_t i_length = ControlGetLength( p_demux ); if( i_length <= 0 ) return VLC_EGENERIC; const uint64_t i_stream_size = stream_Size( p_demux->s ); if( i_stream_size <= p_sys->i_data_pos ) return VLC_EGENERIC; const double i_bytemicrorate = (double) i_length / (i_stream_size - p_sys->i_data_pos); if( i_bytemicrorate == 0 ) return VLC_EGENERIC; uint64_t i_lower = p_sys->i_data_pos; uint64_t i_upper = i_stream_size; uint64_t i_start_pos; assert( p_sys->i_seekpoint > 0 ); /* ReadMeta ensure at least (0,0) */ if( p_sys->i_seekpoint > 1 ) { /* lookup base offset */ for( i = p_sys->i_seekpoint-1; i >= 0; i-- ) { if( p_sys->seekpoint[i]->i_time_offset <= i_time ) break; } i_lower = p_sys->seekpoint[0]->i_byte_offset + p_sys->i_data_pos; if( i+1 < p_sys->i_seekpoint ) i_upper = p_sys->seekpoint[i+1]->i_byte_offset + p_sys->i_data_pos; i_start_pos = i_lower; } else { i_start_pos = i_time / i_bytemicrorate; } if( VLC_SUCCESS != vlc_stream_Seek( p_demux->s, i_start_pos ) ) return VLC_EGENERIC; int i_ret = RefineSeek( p_demux, i_time, i_bytemicrorate, i_lower, i_upper ); if( i_ret == VLC_SUCCESS ) { p_sys->i_next_block_flags |= BLOCK_FLAG_DISCONTINUITY; Reset( p_sys ); es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, i_time ); } return i_ret; } static int Control( demux_t *p_demux, int i_query, va_list args ) { demux_sys_t *p_sys = p_demux->p_sys; if( i_query == DEMUX_GET_META ) { vlc_meta_t *p_meta = va_arg( args, vlc_meta_t * ); if( p_demux->p_sys->p_meta ) vlc_meta_Merge( p_meta, p_demux->p_sys->p_meta ); return VLC_SUCCESS; } else if( i_query == DEMUX_HAS_UNSUPPORTED_META ) { bool *pb_bool = va_arg( args, bool* ); *pb_bool = true; return VLC_SUCCESS; } else if( i_query == DEMUX_GET_LENGTH ) { int64_t *pi64 = va_arg( args, int64_t * ); *pi64 = ControlGetLength( p_demux ); return VLC_SUCCESS; } else if( i_query == DEMUX_SET_TIME ) { int64_t i_time = va_arg( args, int64_t ); return ControlSetTime( p_demux, i_time ); } else if( i_query == DEMUX_SET_POSITION ) { const double f = va_arg( args, double ); int64_t i_length = ControlGetLength( p_demux ); int i_ret; if( i_length > 0 ) { i_ret = ControlSetTime( p_demux, i_length * f ); if( i_ret == VLC_SUCCESS ) return i_ret; } /* just byte pos seek */ i_ret = vlc_stream_Seek( p_demux->s, (int64_t) (f * stream_Size( p_demux->s )) ); if( i_ret == VLC_SUCCESS ) { p_sys->i_next_block_flags |= BLOCK_FLAG_DISCONTINUITY; Reset( p_sys ); } return i_ret; } else if( i_query == DEMUX_GET_TIME ) { int64_t *pi64 = va_arg( args, int64_t * ); *pi64 = ControlGetTime( p_demux ); return VLC_SUCCESS; } else if( i_query == DEMUX_GET_POSITION ) { const int64_t i_length = ControlGetLength(p_demux); if( i_length > 0 ) { double current = ControlGetTime(p_demux); if( current <= i_length ) { *(va_arg( args, double * )) = current / (double)i_length; return VLC_SUCCESS; } } /* Else fallback on byte position */ } else if( i_query == DEMUX_GET_ATTACHMENTS ) { input_attachment_t ***ppp_attach = va_arg( args, input_attachment_t *** ); int *pi_int = va_arg( args, int * ); if( p_sys->i_attachments <= 0 ) return VLC_EGENERIC; *ppp_attach = vlc_alloc( p_sys->i_attachments, sizeof(input_attachment_t*) ); if( !*ppp_attach ) return VLC_EGENERIC; *pi_int = p_sys->i_attachments; for( int i = 0; i < p_sys->i_attachments; i++ ) (*ppp_attach)[i] = vlc_input_attachment_Duplicate( p_sys->attachments[i] ); return VLC_SUCCESS; } else if( i_query == DEMUX_GET_TITLE_INFO ) { input_title_t ***ppp_title = va_arg( args, input_title_t *** ); int *pi_int = va_arg( args, int * ); int *pi_title_offset = va_arg( args, int * ); int *pi_seekpoint_offset = va_arg( args, int * ); if( !p_sys->i_title_seekpoints ) return VLC_EGENERIC; *pi_int = 1; *ppp_title = malloc( sizeof(input_title_t*) ); if(!*ppp_title) return VLC_EGENERIC; input_title_t *p_title = (*ppp_title)[0] = vlc_input_title_New(); if(!p_title) { free(*ppp_title); return VLC_EGENERIC; } p_title->seekpoint = vlc_alloc( p_sys->i_title_seekpoints, sizeof(seekpoint_t*) ); if(!p_title->seekpoint) { vlc_input_title_Delete(p_title); free(*ppp_title); return VLC_EGENERIC; } p_title->i_seekpoint = p_sys->i_title_seekpoints; for( int i = 0; i < p_title->i_seekpoint; i++ ) p_title->seekpoint[i] = vlc_seekpoint_Duplicate( p_sys->pp_title_seekpoints[i] ); *pi_title_offset = 0; *pi_seekpoint_offset = 0; return VLC_SUCCESS; } else if( i_query == DEMUX_SET_TITLE ) { const int i_title = va_arg( args, int ); if( i_title != 0 ) return VLC_EGENERIC; return VLC_SUCCESS; } else if( i_query == DEMUX_SET_SEEKPOINT ) { const int i_seekpoint = va_arg( args, int ); if( !p_sys->i_title_seekpoints || i_seekpoint >= p_sys->i_title_seekpoints ) return VLC_EGENERIC; return ControlSetTime( p_demux, p_sys->pp_title_seekpoints[i_seekpoint]->i_time_offset ); } return demux_vaControlHelper( p_demux->s, p_sys->i_data_pos, -1, 8*0, 1, i_query, args ); } enum { META_STREAMINFO = 0, META_SEEKTABLE = 3, META_COMMENT = 4, META_PICTURE = 6, }; static inline int Get24bBE( const uint8_t *p ) { return (p[0] << 16)|(p[1] << 8)|(p[2]); } static void ParseSeekTable( demux_t *p_demux, const uint8_t *p_data, size_t i_data, unsigned i_sample_rate ); static void ParseComment( demux_t *, const uint8_t *p_data, size_t i_data ); static void ParsePicture( demux_t *, const uint8_t *p_data, size_t i_data ); static int ParseHeaders( demux_t *p_demux, es_format_t *p_fmt ) { demux_sys_t *p_sys = p_demux->p_sys; ssize_t i_peek; const uint8_t *p_peek; bool b_last; /* Be sure we have seekpoint 0 */ flac_seekpoint_t *s = xmalloc( sizeof (*s) ); s->i_time_offset = 0; s->i_byte_offset = 0; TAB_APPEND( p_sys->i_seekpoint, p_sys->seekpoint, s ); uint8_t header[4]; if( vlc_stream_Read( p_demux->s, header, 4) < 4) return VLC_EGENERIC; if (memcmp(header, "fLaC", 4)) return VLC_EGENERIC; b_last = 0; while( !b_last ) { int i_len; int i_type; i_peek = vlc_stream_Peek( p_demux->s, &p_peek, 4 ); if( i_peek < 4 ) break; b_last = p_peek[0]&0x80; i_type = p_peek[0]&0x7f; i_len = Get24bBE( &p_peek[1] ); if( i_type == META_STREAMINFO && p_fmt->p_extra == NULL ) { if( i_len != FLAC_STREAMINFO_SIZE ) { msg_Err( p_demux, "invalid size %d for a STREAMINFO metadata block", i_len ); return VLC_EGENERIC; } p_fmt->p_extra = malloc( FLAC_STREAMINFO_SIZE ); if( p_fmt->p_extra == NULL ) return VLC_EGENERIC; if( vlc_stream_Read( p_demux->s, NULL, 4) < 4) { FREENULL( p_fmt->p_extra ); return VLC_EGENERIC; } if( vlc_stream_Read( p_demux->s, p_fmt->p_extra, FLAC_STREAMINFO_SIZE ) != FLAC_STREAMINFO_SIZE ) { msg_Err( p_demux, "failed to read STREAMINFO metadata block" ); FREENULL( p_fmt->p_extra ); return VLC_EGENERIC; } p_fmt->i_extra = FLAC_STREAMINFO_SIZE; /* */ p_sys->b_stream_info = true; FLAC_ParseStreamInfo( (uint8_t *) p_fmt->p_extra, &p_sys->stream_info ); p_fmt->audio.i_rate = p_sys->stream_info.sample_rate; p_fmt->audio.i_channels = p_sys->stream_info.channels; p_fmt->audio.i_bitspersample = p_sys->stream_info.bits_per_sample; if( p_sys->stream_info.sample_rate > 0 ) p_sys->i_length = p_sys->stream_info.total_samples * CLOCK_FREQ / p_sys->stream_info.sample_rate; continue; } else if( i_type == META_SEEKTABLE ) { i_peek = vlc_stream_Peek( p_demux->s, &p_peek, 4+i_len ); if( i_peek == 4+i_len ) ParseSeekTable( p_demux, p_peek, i_peek, p_fmt->audio.i_rate ); } else if( i_type == META_COMMENT ) { i_peek = vlc_stream_Peek( p_demux->s, &p_peek, 4+i_len ); if( i_peek == 4+i_len ) ParseComment( p_demux, p_peek, i_peek ); } else if( i_type == META_PICTURE ) { i_peek = vlc_stream_Peek( p_demux->s, &p_peek, 4+i_len ); if( i_peek == 4+i_len ) ParsePicture( p_demux, p_peek, i_peek ); } if( vlc_stream_Read( p_demux->s, NULL, 4+i_len ) < 4+i_len ) break; } /* */ p_sys->i_data_pos = vlc_stream_Tell( p_demux->s ); if ( p_fmt->p_extra == NULL ) return VLC_EGENERIC; return VLC_SUCCESS; } static void ParseSeekTable( demux_t *p_demux, const uint8_t *p_data, size_t i_data, unsigned i_sample_rate ) { demux_sys_t *p_sys = p_demux->p_sys; flac_seekpoint_t *s; size_t i; if( i_sample_rate == 0 ) return; /* */ for( i = 0; i < (i_data-4)/18; i++ ) { const int64_t i_sample = GetQWBE( &p_data[4+18*i+0] ); int j; if( i_sample < 0 || i_sample >= INT64_MAX || GetQWBE( &p_data[4+18*i+8] ) < FLAC_STREAMINFO_SIZE ) break; s = xmalloc( sizeof (*s) ); s->i_time_offset = i_sample * CLOCK_FREQ / i_sample_rate; s->i_byte_offset = GetQWBE( &p_data[4+18*i+8] ); /* Check for duplicate entry */ for( j = 0; j < p_sys->i_seekpoint; j++ ) { if( p_sys->seekpoint[j]->i_time_offset == s->i_time_offset || p_sys->seekpoint[j]->i_byte_offset == s->i_byte_offset ) { free( s ); s = NULL; break; } } if( s ) { TAB_APPEND( p_sys->i_seekpoint, p_sys->seekpoint, s ); } } /* TODO sort it by size and remove wrong seek entry (time not increasing) */ } static void ParseComment( demux_t *p_demux, const uint8_t *p_data, size_t i_data ) { demux_sys_t *p_sys = p_demux->p_sys; if( i_data < 4 ) return; vorbis_ParseComment( NULL, &p_sys->p_meta, &p_data[4], i_data - 4, &p_sys->i_attachments, &p_sys->attachments, &p_sys->i_cover_score, &p_sys->i_cover_idx, &p_sys->i_title_seekpoints, &p_sys->pp_title_seekpoints, NULL, NULL ); } static void ParsePicture( demux_t *p_demux, const uint8_t *p_data, size_t i_data ) { demux_sys_t *p_sys = p_demux->p_sys; i_data -= 4; p_data += 4; input_attachment_t *p_attachment = ParseFlacPicture( p_data, i_data, p_sys->i_attachments, &p_sys->i_cover_score, &p_sys->i_cover_idx ); if( p_attachment == NULL ) return; TAB_APPEND( p_sys->i_attachments, p_sys->attachments, p_attachment ); }