1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2005 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gertjan Van Droogenbroeck <gertjanvd _PLUS_ vlc _AT_ gmail _DOT_ com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_demux.h>
40 /*****************************************************************************
42 *****************************************************************************/
43 static int Open ( vlc_object_t * );
44 static void Close ( vlc_object_t * );
47 set_category( CAT_INPUT );
48 set_subcategory( SUBCAT_INPUT_DEMUX );
49 set_description( N_("Nuv demuxer") );
50 set_capability( "demux", 145 );
51 set_callbacks( Open, Close );
52 add_shortcut( "nuv" );
55 /*****************************************************************************
57 *****************************************************************************/
58 static int Demux ( demux_t * );
59 static int Control( demux_t *, int, va_list );
67 } demux_index_entry_t;
74 demux_index_entry_t *idx;
78 static void demux_IndexInit( demux_index_t * );
79 static void demux_IndexClean( demux_index_t * );
80 static void demux_IndexAppend( demux_index_t *,
81 int64_t i_time, int64_t i_offset );
82 /* Convert a time into offset */
83 static int64_t demux_IndexConvertTime( demux_index_t *, int64_t i_time );
84 /* Find the nearest offset in the index */
85 static int64_t demux_IndexFindOffset( demux_index_t *, int64_t i_offset );
91 char id[12]; /* "NuppelVideo\0" or "MythTVVideo\0" */
92 char version[5]; /* "x.xx\0" */
99 char i_mode; /* P progressive, I interlaced */
101 double d_aspect; /* 1.0 squared pixel */
104 int i_video_blocks; /* 0 no video, -1 unknown */
108 int i_keyframe_distance;
112 #define NUV_FH_SIZE 12
115 char i_type; /* A: audio, V: video, S: sync; T: test
116 R: Seekpoint (string:RTjjjjjjjj)
117 D: Extra data for codec
118 X: extended data Q: seektable */
119 char i_compression; /* V: 0 uncompressed
124 A: 0 uncompressed (44100 1-bits, 2ch)
130 N null frame loudless
132 S: B audio and vdeo sync point
133 A audio sync info (timecode == effective
135 V next video sync (timecode == next video
137 S audio,video,text correlation */
138 char i_keyframe; /* 0 keyframe, else no no key frame */
139 uint8_t i_filters; /* 0x01: gauss 5 pixel (8,2,2,2,2)/16
140 0x02: gauss 5 pixel (8,1,1,1,1)/12
141 0x04: cartoon filter */
143 int i_timecode; /* ms */
145 int i_length; /* V,A,T: length of following data
146 S: length of packet correl */
152 vlc_fourcc_t i_video_fcc;
154 vlc_fourcc_t i_audio_fcc;
155 int i_audio_sample_rate;
156 int i_audio_bits_per_sample;
157 int i_audio_channels;
158 int i_audio_compression_ratio;
160 int i_rtjpeg_quality;
161 int i_rtjpeg_luma_filter;
162 int i_rtjpeg_chroma_filter;
167 int64_t i_seektable_offset;
168 int64_t i_keyframe_adjust_offset;
175 extended_header_t exh;
178 es_out_id_t *p_es_video;
182 es_out_id_t *p_es_audio;
188 /* frameheader buffer */
189 uint8_t fh_buffer[NUV_FH_SIZE];
190 int64_t i_total_frames;
191 int64_t i_total_length;
192 /* first frame position (used for calculating size without seektable) */
193 int i_first_frame_offset;
196 static int HeaderLoad( demux_t *, header_t *h );
197 static int FrameHeaderLoad( demux_t *, frame_header_t *h );
198 static int ExtendedHeaderLoad( demux_t *, extended_header_t *h );
199 static int SeekTableLoad( demux_t *, demux_sys_t * );
200 static int ControlSetPosition( demux_t *p_demux, int64_t i_pos, bool b_guess );
202 /*****************************************************************************
203 * Open: initializes ES structures
204 *****************************************************************************/
205 static int Open( vlc_object_t * p_this )
207 demux_t *p_demux = (demux_t*)p_this;
209 const uint8_t *p_peek;
214 if( stream_Peek( p_demux->s, &p_peek, 12 ) != 12 ||
215 ( strncmp( (char *)p_peek, "MythTVVideo", 11 ) &&
216 strncmp( (char *)p_peek, "NuppelVideo", 11 ) ) )
219 p_sys = malloc( sizeof( demux_sys_t ) );
222 memset( p_sys, 0, sizeof( demux_sys_t ) );
223 p_sys->p_es_video = NULL;
224 p_sys->p_es_audio = NULL;
225 p_sys->p_extra_f = NULL;
227 p_sys->b_index = false;
228 p_sys->i_total_frames = -1;
229 p_sys->i_total_length = -1;
230 demux_IndexInit( &p_sys->idx );
232 p_demux->p_sys = p_sys;
234 /* Info about the stream */
235 stream_Control( p_demux->s, STREAM_CAN_SEEK, &p_sys->b_seekable );
237 if( p_sys->b_seekable )
238 msg_Dbg( p_demux, "stream is seekable" );
240 msg_Dbg( p_demux, "stream is NOT seekable" );
243 if( HeaderLoad( p_demux, &p_sys->hdr ) )
247 if( FrameHeaderLoad( p_demux, &fh ) || fh.i_type != 'D' )
249 if( fh.i_length > 0 )
251 if( fh.i_compression == 'F' || fh.i_compression == 'R' )
253 /* ffmpeg extra data */
254 p_sys->i_extra_f = fh.i_length;
255 p_sys->p_extra_f = malloc( fh.i_length );
256 if( p_sys->p_extra_f == NULL || stream_Read( p_demux->s,
257 p_sys->p_extra_f, fh.i_length ) != fh.i_length )
262 msg_Warn( p_demux, "unsupported 'D' frame (c=%c)", fh.i_compression );
263 if( stream_Read( p_demux->s, NULL, fh.i_length ) != fh.i_length )
268 /* Check and load extented */
269 if( stream_Peek( p_demux->s, &p_peek, 1 ) != 1 )
271 if( p_peek[0] == 'X' )
275 if( FrameHeaderLoad( p_demux, &fh ) )
277 if( fh.i_length != 512 )
280 if( ExtendedHeaderLoad( p_demux, &p_sys->exh ) )
283 if( !p_sys->b_seekable )
284 msg_Warn( p_demux, "stream is not seekable, skipping seektable" );
285 else if( SeekTableLoad( p_demux, p_sys ) )
293 /* XXX: for now only file with extended chunk are supported
294 * why: because else we need to have support for rtjpeg+stupid nuv shit */
295 msg_Err( p_demux, "incomplete NUV support (upload samples)" );
299 /* Create audio/video (will work only with extended header and audio=mp3 */
300 if( p_sys->hdr.i_video_blocks != 0 )
304 es_format_Init( &fmt, VIDEO_ES, p_sys->exh.i_video_fcc );
305 fmt.video.i_width = p_sys->hdr.i_width;
306 fmt.video.i_height = p_sys->hdr.i_height;
307 fmt.i_extra = p_sys->i_extra_f;
308 fmt.p_extra = p_sys->p_extra_f;
309 fmt.video.i_aspect = VOUT_ASPECT_FACTOR * p_sys->hdr.d_aspect;
311 p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
313 if( p_sys->hdr.i_audio_blocks != 0 )
317 es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC('m','p','g','a') );
318 fmt.audio.i_rate = p_sys->exh.i_audio_sample_rate;
319 fmt.audio.i_bitspersample = p_sys->exh.i_audio_bits_per_sample;
321 p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
323 if( p_sys->hdr.i_text_blocks != 0 )
325 msg_Warn( p_demux, "text not yet supported (upload samples)" );
328 p_sys->i_first_frame_offset = stream_Tell( p_demux->s );
330 /* Fill p_demux fields */
331 p_demux->pf_demux = Demux;
332 p_demux->pf_control = Control;
337 msg_Warn( p_demux, "cannot load Nuv file" );
338 p_demux->p_sys = NULL;
343 /*****************************************************************************
344 * Close: frees unused data
345 *****************************************************************************/
346 static void Close( vlc_object_t * p_this )
348 demux_t *p_demux = (demux_t*)p_this;
349 demux_sys_t *p_sys = p_demux->p_sys;
351 free( p_sys->p_extra_f );
352 demux_IndexClean( &p_sys->idx );
356 /*****************************************************************************
357 * Demux: reads and demuxes data packets
358 *****************************************************************************
359 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
360 *****************************************************************************/
361 static int Demux( demux_t *p_demux )
363 demux_sys_t *p_sys = p_demux->p_sys;
369 if( !vlc_object_alive (p_demux) )
372 if( FrameHeaderLoad( p_demux, &fh ) )
375 if( fh.i_type == 'A' || fh.i_type == 'V' )
378 /* TODO add support for some block type */
380 if( fh.i_type != 'R' && fh.i_length > 0 )
382 if( stream_Read( p_demux->s, NULL, fh.i_length ) != fh.i_length )
388 p_data = stream_Block( p_demux->s, fh.i_length );
389 p_data->i_dts = (int64_t)fh.i_timecode * 1000;
390 p_data->i_pts = (fh.i_type == 'V') ? 0 : p_data->i_dts;
392 /* only add keyframes to index */
393 if( !fh.i_keyframe && !p_sys->b_index )
394 demux_IndexAppend( &p_sys->idx, p_data->i_dts, stream_Tell(p_demux->s) - NUV_FH_SIZE );
397 if( p_data->i_dts > p_sys->i_pcr )
399 p_sys->i_pcr = p_data->i_dts;
400 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr );
403 if( fh.i_type == 'A' && p_sys->p_es_audio )
405 if( fh.i_compression == '3' )
406 es_out_Send( p_demux->out, p_sys->p_es_audio, p_data );
409 msg_Dbg( p_demux, "unsupported compression %c for audio (upload samples)", fh.i_compression );
410 block_Release( p_data );
413 else if( fh.i_type == 'V' && p_sys->p_es_video )
415 if( fh.i_compression >='0' && fh.i_compression <='3' )
417 /* for rtjpeg data, the header is also needed */
418 p_data = block_Realloc( p_data, NUV_FH_SIZE, fh.i_length );
419 memcpy( p_data->p_buffer, p_sys->fh_buffer, NUV_FH_SIZE );
421 /* 0,1,2,3 -> rtjpeg, >=4 mpeg4 */
422 if( fh.i_compression >= '0' )
423 es_out_Send( p_demux->out, p_sys->p_es_video, p_data );
426 msg_Dbg( p_demux, "unsupported compression %c for video (upload samples)", fh.i_compression );
427 block_Release( p_data );
432 block_Release( p_data );
438 /*****************************************************************************
440 *****************************************************************************/
441 static int Control( demux_t *p_demux, int i_query, va_list args )
443 demux_sys_t *p_sys = p_demux->p_sys;
451 case DEMUX_GET_POSITION:
452 pf = (double*)va_arg( args, double * );
454 if( p_sys->i_total_length > 0 && p_sys->i_pcr >= 0 )
456 *pf = (double)p_sys->i_pcr / (double)p_sys->i_total_length;
460 i64 = stream_Size( p_demux->s );
462 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
468 case DEMUX_SET_POSITION:
472 f = (double)va_arg( args, double );
476 /* first try to see if we can seek based on time (== GET_LENGTH works) */
477 if( p_sys->i_total_length > 0 && ( i_pos = demux_IndexConvertTime( &p_sys->idx, p_sys->i_total_length * f ) ) > 0 )
478 return ControlSetPosition( p_demux, i_pos, false );
480 /* if not search based on total stream size */
481 else if( ( i_pos = demux_IndexFindOffset( &p_sys->idx, stream_Size( p_demux->s ) * f ) ) >= 0 )
482 return ControlSetPosition( p_demux, i_pos, false );
484 else if( ( i_pos = p_sys->i_first_frame_offset + ( stream_Size( p_demux->s ) - p_sys->i_first_frame_offset ) * f ) >= 0 )
485 return ControlSetPosition( p_demux, i_pos, true );
492 pi64 = (int64_t*)va_arg( args, int64_t * );
493 *pi64 = p_sys->i_pcr >= 0 ? p_sys->i_pcr : 0;
499 i64 = (int64_t)va_arg( args, int64_t );
503 i_pos = demux_IndexConvertTime( &p_sys->idx, i64 );
507 return ControlSetPosition( p_demux, i_pos, false );
510 case DEMUX_GET_LENGTH:
511 pi64 = (int64_t*)va_arg( args, int64_t * );
512 if( p_sys->i_total_length >= 0 )
514 *pi64 = p_sys->i_total_length;
517 else if( stream_Tell( p_demux->s ) > p_sys->i_first_frame_offset )
519 /* This should give an approximation of the total duration */
520 *pi64 = (double)( stream_Size( p_demux->s ) - p_sys->i_first_frame_offset ) /
521 (double)( stream_Tell( p_demux->s ) - p_sys->i_first_frame_offset )
522 * (double)( p_sys->i_pcr >= 0 ? p_sys->i_pcr : 0 );
529 pf = (double*)va_arg( args, double * );
530 *pf = p_sys->hdr.d_fps;
539 static int ControlSetPosition( demux_t *p_demux, int64_t i_pos, bool b_guess )
541 demux_sys_t *p_sys = p_demux->p_sys;
546 /* if we can seek in the stream */
547 if( p_sys->b_seekable && !b_guess )
549 if( stream_Seek( p_demux->s, i_pos ) )
555 if( i_pos > stream_Tell( p_demux->s ) )
557 msg_Dbg( p_demux, "unable to seek, skipping frames (slow)" );
561 msg_Warn( p_demux, "unable to seek, only forward seeking is possible" );
567 while( vlc_object_alive (p_demux) )
572 if( ( i_tell = stream_Tell( p_demux->s ) ) >= i_pos )
575 if( FrameHeaderLoad( p_demux, &fh ) )
578 if( fh.i_type == 'A' || fh.i_type == 'V' )
580 if( !fh.i_keyframe && !p_sys->b_index )
581 demux_IndexAppend( &p_sys->idx,(int64_t)fh.i_timecode*1000, i_tell );
584 if( fh.i_type != 'R' && fh.i_length > 0 )
586 if( stream_Read( p_demux->s, NULL, fh.i_length ) != fh.i_length )
594 /*****************************************************************************
596 *****************************************************************************/
597 static inline void GetDoubleLE( double *pd, void *src )
599 /* FIXME works only if sizeof(double) == 8 */
600 #ifdef WORDS_BIGENDIAN
601 uint8_t *p = (uint8_t*)pd, *q = (uint8_t*)src;
603 for( i = 0; i < 8; i++ )
606 memcpy( pd, src, 8 );
612 static int HeaderLoad( demux_t *p_demux, header_t *h )
616 if( stream_Read( p_demux->s, buffer, 72 ) != 72 )
619 /* XXX: they are alignment to take care of (another broken format) */
620 memcpy( h->id, &buffer[ 0], 12 );
621 memcpy( h->version, &buffer[12], 5 );
622 h->i_width = GetDWLE( &buffer[20] );
623 h->i_height = GetDWLE( &buffer[24] );
624 h->i_width_desired = GetDWLE( &buffer[28] );
625 h->i_height_desired = GetDWLE( &buffer[32] );
626 h->i_mode = buffer[36];
627 GetDoubleLE( &h->d_aspect, &buffer[40] );
628 GetDoubleLE( &h->d_fps, &buffer[48] );
629 h->i_video_blocks = GetDWLE( &buffer[56] );
630 h->i_audio_blocks = GetDWLE( &buffer[60] );
631 h->i_text_blocks = GetDWLE( &buffer[64] );
632 h->i_keyframe_distance = GetDWLE( &buffer[68] );
634 msg_Dbg( p_demux, "nuv: h=%s v=%s %dx%d a=%f fps=%f v=%d a=%d t=%d kfd=%d",
635 h->id, h->version, h->i_width, h->i_height, h->d_aspect,
636 h->d_fps, h->i_video_blocks, h->i_audio_blocks, h->i_text_blocks,
637 h->i_keyframe_distance );
644 static int FrameHeaderLoad( demux_t *p_demux, frame_header_t *h )
646 uint8_t* buffer = p_demux->p_sys->fh_buffer;
648 if( stream_Read( p_demux->s, buffer, 12 ) != 12 )
651 h->i_type = buffer[0];
652 h->i_compression = buffer[1];
653 h->i_keyframe = buffer[2];
654 h->i_filters = buffer[3];
656 h->i_timecode = GetDWLE( &buffer[4] );
657 h->i_length = GetDWLE( &buffer[8] );
659 msg_Dbg( p_demux, "frame hdr: t=%c c=%c k=%d f=0x%x timecode=%d l=%d",
661 h->i_compression ? h->i_compression : ' ',
662 h->i_keyframe ? h->i_keyframe : ' ',
664 h->i_timecode, h->i_length );
669 static int ExtendedHeaderLoad( demux_t *p_demux, extended_header_t *h )
673 if( stream_Read( p_demux->s, buffer, 512 ) != 512 )
676 h->i_version = GetDWLE( &buffer[0] );
677 h->i_video_fcc = VLC_FOURCC( buffer[4], buffer[5], buffer[6], buffer[7] );
678 h->i_audio_fcc = VLC_FOURCC( buffer[8], buffer[9], buffer[10], buffer[11] );
679 h->i_audio_sample_rate = GetDWLE( &buffer[12] );
680 h->i_audio_bits_per_sample = GetDWLE( &buffer[16] );
681 h->i_audio_channels = GetDWLE( &buffer[20] );
682 h->i_audio_compression_ratio = GetDWLE( &buffer[24] );
683 h->i_audio_quality = GetDWLE( &buffer[28] );
684 h->i_rtjpeg_quality = GetDWLE( &buffer[32] );
685 h->i_rtjpeg_luma_filter = GetDWLE( &buffer[36] );
686 h->i_rtjpeg_chroma_filter = GetDWLE( &buffer[40] );
687 h->i_lavc_bitrate = GetDWLE( &buffer[44] );
688 h->i_lavc_qmin = GetDWLE( &buffer[48] );
689 h->i_lavc_qmin = GetDWLE( &buffer[52] );
690 h->i_lavc_maxqdiff = GetDWLE( &buffer[56] );
691 h->i_seektable_offset = GetQWLE( &buffer[60] );
692 h->i_keyframe_adjust_offset= GetQWLE( &buffer[68] );
694 msg_Dbg( p_demux, "ex hdr: v=%d vffc=%4.4s afcc=%4.4s %dHz %dbits ach=%d acr=%d aq=%d"
695 "rtjpeg q=%d lf=%d lc=%d lavc br=%d qmin=%d qmax=%d maxqdiff=%d seekableoff=%"PRIi64" keyfao=%"PRIi64,
697 (char*)&h->i_video_fcc,
698 (char*)&h->i_audio_fcc, h->i_audio_sample_rate, h->i_audio_bits_per_sample, h->i_audio_channels,
699 h->i_audio_compression_ratio, h->i_audio_quality,
700 h->i_rtjpeg_quality, h->i_rtjpeg_luma_filter, h->i_rtjpeg_chroma_filter,
701 h->i_lavc_bitrate, h->i_lavc_qmin, h->i_lavc_qmax, h->i_lavc_maxqdiff,
702 h->i_seektable_offset, h->i_keyframe_adjust_offset );
710 int64_t i_file_offset;
711 int32_t i_keyframe_number;
716 int32_t i_keyframe_number;
720 static int SeekTableLoad( demux_t *p_demux, demux_sys_t *p_sys )
723 int64_t i_original_pos;
724 uint8_t* p_seek_table;
725 uint8_t* p_kfa_table;
726 int32_t i_seek_elements = 0, i_kfa_elements = 0, j;
727 int64_t i_time, i_offset;
728 int keyframe, last_keyframe = 0, frame = 0, kfa_entry_id = 0;
730 if( p_sys->exh.i_seektable_offset <= 0 )
733 /* Save current position */
734 i_original_pos = stream_Tell( p_demux->s );
736 msg_Dbg( p_demux, "current offset %"PRIi64, i_original_pos );
738 msg_Dbg( p_demux, "seeking in stream to %"PRIi64, p_sys->exh.i_seektable_offset );
740 if( stream_Seek( p_demux->s, p_sys->exh.i_seektable_offset ) )
743 if( FrameHeaderLoad( p_demux, &fh ) )
746 if( fh.i_type == 'Q' )
748 p_seek_table = malloc( fh.i_length );
749 if( p_seek_table == NULL )
752 if( stream_Read( p_demux->s, p_seek_table, fh.i_length ) != fh.i_length )
754 free( p_seek_table );
758 i_seek_elements = fh.i_length / 12;
762 msg_Warn( p_demux, "invalid seektable, frame type=%c", fh.i_type );
763 stream_Seek( p_demux->s, i_original_pos );
768 /* Get keyframe adjust offsets */
769 if( p_sys->exh.i_keyframe_adjust_offset > 0 )
771 msg_Dbg( p_demux, "seeking in stream to %"PRIi64, p_sys->exh.i_keyframe_adjust_offset );
772 if( stream_Seek( p_demux->s, p_sys->exh.i_keyframe_adjust_offset ) )
774 free( p_seek_table );
778 if( FrameHeaderLoad( p_demux, &fh ) )
780 free( p_seek_table );
784 if( fh.i_type == 'K' && fh.i_length >= 8 )
786 p_kfa_table = malloc( fh.i_length );
788 if( p_seek_table == NULL )
790 free( p_seek_table );
794 if( stream_Read( p_demux->s, p_kfa_table, fh.i_length ) != fh.i_length )
796 free( p_seek_table );
801 i_kfa_elements = fh.i_length / 8;
806 if( i_kfa_elements > 0 )
807 msg_Warn( p_demux, "untested keyframe adjust support, upload samples" );
809 for(j=0; j < i_seek_elements; j++)
812 uint8_t* p = p_seek_table + j * 12;
813 msg_Dbg( p_demux, "%x %x %x %x %x %x %x %x %x %x %x %x",
814 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8], p[9], p[10], p[11]);
816 keyframe = GetDWLE( p_seek_table + j * 12 + 8 );
818 frame += (keyframe - last_keyframe) * p_sys->hdr.i_keyframe_distance;
820 if( kfa_entry_id < i_kfa_elements && *(int32_t*)(p_kfa_table + kfa_entry_id * 12 + 4) == j )
822 frame -= *(int32_t*)(p_kfa_table + kfa_entry_id * 12);
823 msg_Dbg( p_demux, "corrected keyframe %d with current frame number %d (corrected with %d)",
824 keyframe, frame, *(int32_t*)(p_kfa_table + kfa_entry_id * 12) );
828 i_time = (double)( (int64_t)frame * 1000000 ) / p_sys->hdr.d_fps;
829 i_offset = GetQWLE( p_seek_table + j * 12 );
831 if( i_offset == 0 && i_time != 0 )
832 msg_Dbg( p_demux, "invalid file offset %d %"PRIi64, keyframe, i_offset );
835 demux_IndexAppend( &p_sys->idx, i_time , i_offset );
837 msg_Dbg( p_demux, "adding entry position %d %"PRIi64 " file offset %"PRIi64, keyframe, i_time, i_offset );
841 last_keyframe = keyframe;
844 p_sys->i_total_frames = (int64_t)frame;
846 p_sys->b_index = true;
848 p_sys->i_total_length = p_sys->i_total_frames * 1000000 / p_sys->hdr.d_fps;
850 msg_Dbg( p_demux, "index table loaded (%d elements)", i_seek_elements );
853 free ( p_kfa_table );
855 free ( p_seek_table );
857 /* Restore stream position */
858 if( stream_Seek( p_demux->s, i_original_pos ) )
865 /*****************************************************************************/
866 #define DEMUX_INDEX_SIZE_MAX (100000)
867 static void demux_IndexInit( demux_index_t *p_idx )
870 p_idx->i_idx_max = 0;
873 static void demux_IndexClean( demux_index_t *p_idx )
878 static void demux_IndexAppend( demux_index_t *p_idx,
879 int64_t i_time, int64_t i_offset )
881 /* Be sure to append new entry (we don't insert point) */
882 if( p_idx->i_idx > 0 && p_idx->idx[p_idx->i_idx-1].i_time >= i_time )
886 if( p_idx->i_idx >= p_idx->i_idx_max )
888 if( p_idx->i_idx >= DEMUX_INDEX_SIZE_MAX )
890 /* Avoid too big index */
891 const int64_t i_length = p_idx->idx[p_idx->i_idx-1].i_time -
892 p_idx->idx[0].i_time;
893 const int i_count = DEMUX_INDEX_SIZE_MAX/2;
896 /* We try to reduce the resolution of the index by a factor 2 */
897 for( i = 1, j = 1; i < p_idx->i_idx; i++ )
899 if( p_idx->idx[i].i_time < j * i_length / i_count )
902 p_idx->idx[j++] = p_idx->idx[i];
906 if( p_idx->i_idx > 3 * DEMUX_INDEX_SIZE_MAX / 4 )
908 /* We haven't created enough space
909 * (This method won't create a good index but work for sure) */
910 for( i = 0; i < p_idx->i_idx/2; i++ )
911 p_idx->idx[i] = p_idx->idx[2*i];
917 p_idx->i_idx_max += 1000;
918 p_idx->idx = realloc( p_idx->idx,
919 p_idx->i_idx_max*sizeof(demux_index_entry_t));
924 p_idx->idx[p_idx->i_idx].i_time = i_time;
925 p_idx->idx[p_idx->i_idx].i_offset = i_offset;
929 static int64_t demux_IndexConvertTime( demux_index_t *p_idx, int64_t i_time )
932 int i_max = p_idx->i_idx-1;
935 if( p_idx->i_idx <= 0 )
938 /* Special border case */
939 if( i_time <= p_idx->idx[0].i_time )
940 return p_idx->idx[0].i_offset;
941 if( i_time >= p_idx->idx[i_max].i_time )
942 return p_idx->idx[i_max].i_offset;
949 if( i_max - i_min <= 1 )
952 i_med = (i_min+i_max)/2;
953 if( p_idx->idx[i_med].i_time < i_time )
955 else if( p_idx->idx[i_med].i_time > i_time )
958 return p_idx->idx[i_med].i_offset;
961 /* return nearest in time */
962 if( i_time - p_idx->idx[i_min].i_time < p_idx->idx[i_max].i_time - i_time )
963 return p_idx->idx[i_min].i_offset;
965 return p_idx->idx[i_max].i_offset;
969 static int64_t demux_IndexFindOffset( demux_index_t *p_idx, int64_t i_offset )
972 int i_max = p_idx->i_idx-1;
975 if( p_idx->i_idx <= 0 )
978 /* Special border case */
979 if( i_offset <= p_idx->idx[0].i_offset )
980 return p_idx->idx[0].i_offset;
981 if( i_offset == p_idx->idx[i_max].i_offset )
982 return p_idx->idx[i_max].i_offset;
983 if( i_offset > p_idx->idx[i_max].i_offset )
991 if( i_max - i_min <= 1 )
994 i_med = (i_min+i_max)/2;
995 if( p_idx->idx[i_med].i_offset < i_offset )
997 else if( p_idx->idx[i_med].i_offset > i_offset )
1000 return p_idx->idx[i_med].i_offset;
1003 /* return nearest */
1004 if( i_offset - p_idx->idx[i_min].i_offset < p_idx->idx[i_max].i_offset - i_offset )
1005 return p_idx->idx[i_min].i_offset;
1007 return p_idx->idx[i_max].i_offset;