1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2005 VLC authors and VideoLAN
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 it
11 * under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * 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 )
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;
213 if( stream_Peek( p_demux->s, &p_peek, 12 ) != 12 ||
214 ( strncmp( (char *)p_peek, "MythTVVideo", 11 ) &&
215 strncmp( (char *)p_peek, "NuppelVideo", 11 ) ) )
218 p_sys = malloc( sizeof( demux_sys_t ) );
221 memset( p_sys, 0, sizeof( demux_sys_t ) );
222 p_sys->p_es_video = NULL;
223 p_sys->p_es_audio = NULL;
224 p_sys->p_extra_f = NULL;
226 p_sys->b_index = false;
227 p_sys->i_total_frames = -1;
228 p_sys->i_total_length = -1;
229 demux_IndexInit( &p_sys->idx );
231 p_demux->p_sys = p_sys;
233 /* Info about the stream */
234 stream_Control( p_demux->s, STREAM_CAN_SEEK, &p_sys->b_seekable );
236 if( p_sys->b_seekable )
237 msg_Dbg( p_demux, "stream is seekable" );
239 msg_Dbg( p_demux, "stream is NOT seekable" );
242 if( HeaderLoad( p_demux, &p_sys->hdr ) )
246 if( FrameHeaderLoad( p_demux, &fh ) || fh.i_type != 'D' )
248 if( fh.i_length > 0 )
250 if( fh.i_compression == 'F' || fh.i_compression == 'R' )
252 /* ffmpeg extra data */
253 p_sys->i_extra_f = fh.i_length;
254 p_sys->p_extra_f = malloc( fh.i_length );
255 if( p_sys->p_extra_f == NULL || stream_Read( p_demux->s,
256 p_sys->p_extra_f, fh.i_length ) != fh.i_length )
261 msg_Warn( p_demux, "unsupported 'D' frame (c=%c)", fh.i_compression );
262 if( stream_Read( p_demux->s, NULL, fh.i_length ) != fh.i_length )
267 /* Check and load extented */
268 if( stream_Peek( p_demux->s, &p_peek, 1 ) != 1 )
270 if( p_peek[0] == 'X' )
272 if( FrameHeaderLoad( p_demux, &fh ) )
274 if( fh.i_length != 512 )
277 if( ExtendedHeaderLoad( p_demux, &p_sys->exh ) )
280 if( !p_sys->b_seekable )
281 msg_Warn( p_demux, "stream is not seekable, skipping seektable" );
282 else if( SeekTableLoad( p_demux, p_sys ) )
284 p_sys->b_index = false;
285 msg_Warn( p_demux, "Seektable is broken, seek won't be accurate" );
290 /* XXX: for now only file with extended chunk are supported
291 * why: because else we need to have support for rtjpeg+stupid nuv shit */
292 msg_Err( p_demux, "VLC doesn't support NUV without extended chunks (please upload samples)" );
296 /* Create audio/video (will work only with extended header and audio=mp3 */
297 if( p_sys->hdr.i_video_blocks != 0 )
301 es_format_Init( &fmt, VIDEO_ES, p_sys->exh.i_video_fcc );
302 fmt.video.i_width = p_sys->hdr.i_width;
303 fmt.video.i_height = p_sys->hdr.i_height;
304 fmt.i_extra = p_sys->i_extra_f;
305 fmt.p_extra = p_sys->p_extra_f;
306 fmt.video.i_sar_num = p_sys->hdr.d_aspect * fmt.video.i_height;
307 fmt.video.i_sar_den = fmt.video.i_width;
309 p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
311 if( p_sys->hdr.i_audio_blocks != 0 )
315 es_format_Init( &fmt, AUDIO_ES, VLC_CODEC_MPGA );
316 fmt.audio.i_rate = p_sys->exh.i_audio_sample_rate;
317 fmt.audio.i_bitspersample = p_sys->exh.i_audio_bits_per_sample;
319 p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
321 if( p_sys->hdr.i_text_blocks != 0 )
323 msg_Warn( p_demux, "text not yet supported (upload samples)" );
326 p_sys->i_first_frame_offset = stream_Tell( p_demux->s );
328 /* Fill p_demux fields */
329 p_demux->pf_demux = Demux;
330 p_demux->pf_control = Control;
335 msg_Warn( p_demux, "cannot load Nuv file" );
336 p_demux->p_sys = NULL;
341 /*****************************************************************************
342 * Close: frees unused data
343 *****************************************************************************/
344 static void Close( vlc_object_t * p_this )
346 demux_t *p_demux = (demux_t*)p_this;
347 demux_sys_t *p_sys = p_demux->p_sys;
349 free( p_sys->p_extra_f );
350 demux_IndexClean( &p_sys->idx );
354 /*****************************************************************************
355 * Demux: reads and demuxes data packets
356 *****************************************************************************
357 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
358 *****************************************************************************/
359 static int Demux( demux_t *p_demux )
361 demux_sys_t *p_sys = p_demux->p_sys;
367 if( !vlc_object_alive (p_demux) )
370 if( FrameHeaderLoad( p_demux, &fh ) )
373 if( fh.i_type == 'A' || fh.i_type == 'V' )
376 /* TODO add support for some block type */
378 if( fh.i_type != 'R' && fh.i_length > 0 )
380 if( stream_Read( p_demux->s, NULL, fh.i_length ) != fh.i_length )
386 if( ( p_data = stream_Block( p_demux->s, fh.i_length ) ) == NULL )
389 p_data->i_dts = VLC_TS_0 + (int64_t)fh.i_timecode * 1000;
390 p_data->i_pts = (fh.i_type == 'V') ? VLC_TS_INVALID : 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,
395 p_data->i_dts - VLC_TS_0,
396 stream_Tell(p_demux->s) - NUV_FH_SIZE );
399 if( p_sys->i_pcr < 0 || p_sys->i_pcr < p_data->i_dts - VLC_TS_0 )
401 p_sys->i_pcr = p_data->i_dts - VLC_TS_0;
402 es_out_Control( p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + p_sys->i_pcr );
405 if( fh.i_type == 'A' && p_sys->p_es_audio )
407 if( fh.i_compression == '3' )
408 es_out_Send( p_demux->out, p_sys->p_es_audio, p_data );
411 msg_Dbg( p_demux, "unsupported compression %c for audio (upload samples)", fh.i_compression );
412 block_Release( p_data );
415 else if( fh.i_type == 'V' && p_sys->p_es_video )
417 if( fh.i_compression >='0' && fh.i_compression <='3' )
419 /* for rtjpeg data, the header is also needed */
420 p_data = block_Realloc( p_data, NUV_FH_SIZE, fh.i_length );
421 if( unlikely(!p_data) )
423 memcpy( p_data->p_buffer, p_sys->fh_buffer, NUV_FH_SIZE );
425 /* 0,1,2,3 -> rtjpeg, >=4 mpeg4 */
426 if( fh.i_compression >= '0' )
427 es_out_Send( p_demux->out, p_sys->p_es_video, p_data );
430 msg_Dbg( p_demux, "unsupported compression %c for video (upload samples)", fh.i_compression );
431 block_Release( p_data );
436 block_Release( p_data );
442 /*****************************************************************************
444 *****************************************************************************/
445 static int Control( demux_t *p_demux, int i_query, va_list args )
447 demux_sys_t *p_sys = p_demux->p_sys;
455 case DEMUX_GET_POSITION:
456 pf = (double*)va_arg( args, double * );
458 if( p_sys->i_total_length > 0 && p_sys->i_pcr >= 0 )
460 *pf = (double)p_sys->i_pcr / (double)p_sys->i_total_length;
464 i64 = stream_Size( p_demux->s );
467 const double f_current = stream_Tell( p_demux->s );
468 *pf = f_current / (double)i64;
477 case DEMUX_SET_POSITION:
481 f = (double)va_arg( args, double );
485 /* first try to see if we can seek based on time (== GET_LENGTH works) */
486 if( p_sys->i_total_length > 0 && ( i_pos = demux_IndexConvertTime( &p_sys->idx, p_sys->i_total_length * f ) ) > 0 )
487 return ControlSetPosition( p_demux, i_pos, false );
489 /* if not search based on total stream size */
490 else if( ( i_pos = demux_IndexFindOffset( &p_sys->idx, stream_Size( p_demux->s ) * f ) ) >= 0 )
491 return ControlSetPosition( p_demux, i_pos, false );
493 else if( ( i_pos = p_sys->i_first_frame_offset + ( stream_Size( p_demux->s ) - p_sys->i_first_frame_offset ) * f ) >= 0 )
494 return ControlSetPosition( p_demux, i_pos, true );
501 pi64 = (int64_t*)va_arg( args, int64_t * );
502 *pi64 = p_sys->i_pcr >= 0 ? p_sys->i_pcr : 0;
508 i64 = (int64_t)va_arg( args, int64_t );
512 i_pos = demux_IndexConvertTime( &p_sys->idx, i64 );
516 return ControlSetPosition( p_demux, i_pos, false );
519 case DEMUX_GET_LENGTH:
520 pi64 = (int64_t*)va_arg( args, int64_t * );
521 if( p_sys->i_total_length >= 0 )
523 *pi64 = p_sys->i_total_length;
526 else if( stream_Tell( p_demux->s ) > p_sys->i_first_frame_offset )
528 /* This should give an approximation of the total duration */
529 *pi64 = (double)( stream_Size( p_demux->s ) - p_sys->i_first_frame_offset ) /
530 (double)( stream_Tell( p_demux->s ) - p_sys->i_first_frame_offset )
531 * (double)( p_sys->i_pcr >= 0 ? p_sys->i_pcr : 0 );
538 pf = (double*)va_arg( args, double * );
539 *pf = p_sys->hdr.d_fps;
548 static int ControlSetPosition( demux_t *p_demux, int64_t i_pos, bool b_guess )
550 demux_sys_t *p_sys = p_demux->p_sys;
555 /* if we can seek in the stream */
556 if( p_sys->b_seekable && !b_guess )
558 if( stream_Seek( p_demux->s, i_pos ) )
564 if( i_pos > stream_Tell( p_demux->s ) )
566 msg_Dbg( p_demux, "unable to seek, skipping frames (slow)" );
570 msg_Warn( p_demux, "unable to seek, only forward seeking is possible" );
576 while( vlc_object_alive (p_demux) )
581 if( ( i_tell = stream_Tell( p_demux->s ) ) >= i_pos )
584 if( FrameHeaderLoad( p_demux, &fh ) )
587 if( fh.i_type == 'A' || fh.i_type == 'V' )
589 if( !fh.i_keyframe && !p_sys->b_index )
590 demux_IndexAppend( &p_sys->idx,(int64_t)fh.i_timecode*1000, i_tell );
593 if( fh.i_type != 'R' && fh.i_length > 0 )
595 if( stream_Read( p_demux->s, NULL, fh.i_length ) != fh.i_length )
603 /*****************************************************************************
605 *****************************************************************************/
606 static inline void GetDoubleLE( double *pd, void *src )
608 /* FIXME works only if sizeof(double) == 8 */
609 #ifdef WORDS_BIGENDIAN
610 uint8_t *p = (uint8_t*)pd, *q = (uint8_t*)src;
612 for( i = 0; i < 8; i++ )
615 memcpy( pd, src, 8 );
621 static int HeaderLoad( demux_t *p_demux, header_t *h )
625 if( stream_Read( p_demux->s, buffer, 72 ) != 72 )
628 /* XXX: they are alignment to take care of (another broken format) */
629 memcpy( h->id, &buffer[ 0], 12 );
630 memcpy( h->version, &buffer[12], 5 );
631 h->i_width = GetDWLE( &buffer[20] );
632 h->i_height = GetDWLE( &buffer[24] );
633 h->i_width_desired = GetDWLE( &buffer[28] );
634 h->i_height_desired = GetDWLE( &buffer[32] );
635 h->i_mode = buffer[36];
636 GetDoubleLE( &h->d_aspect, &buffer[40] );
637 GetDoubleLE( &h->d_fps, &buffer[48] );
638 h->i_video_blocks = GetDWLE( &buffer[56] );
639 h->i_audio_blocks = GetDWLE( &buffer[60] );
640 h->i_text_blocks = GetDWLE( &buffer[64] );
641 h->i_keyframe_distance = GetDWLE( &buffer[68] );
643 msg_Dbg( p_demux, "nuv: h=%s v=%s %dx%d a=%f fps=%f v=%d a=%d t=%d kfd=%d",
644 h->id, h->version, h->i_width, h->i_height, h->d_aspect,
645 h->d_fps, h->i_video_blocks, h->i_audio_blocks, h->i_text_blocks,
646 h->i_keyframe_distance );
653 static int FrameHeaderLoad( demux_t *p_demux, frame_header_t *h )
655 uint8_t* buffer = p_demux->p_sys->fh_buffer;
657 if( stream_Read( p_demux->s, buffer, 12 ) != 12 )
660 h->i_type = buffer[0];
661 h->i_compression = buffer[1];
662 h->i_keyframe = buffer[2];
663 h->i_filters = buffer[3];
665 h->i_timecode = GetDWLE( &buffer[4] );
666 h->i_length = GetDWLE( &buffer[8] );
668 msg_Dbg( p_demux, "frame hdr: t=%c c=%c k=%d f=0x%x timecode=%d l=%d",
670 h->i_compression ? h->i_compression : ' ',
671 h->i_keyframe ? h->i_keyframe : ' ',
673 h->i_timecode, h->i_length );
678 static int ExtendedHeaderLoad( demux_t *p_demux, extended_header_t *h )
682 if( stream_Read( p_demux->s, buffer, 512 ) != 512 )
685 h->i_version = GetDWLE( &buffer[0] );
686 h->i_video_fcc = VLC_FOURCC( buffer[4], buffer[5], buffer[6], buffer[7] );
687 h->i_audio_fcc = VLC_FOURCC( buffer[8], buffer[9], buffer[10], buffer[11] );
688 h->i_audio_sample_rate = GetDWLE( &buffer[12] );
689 h->i_audio_bits_per_sample = GetDWLE( &buffer[16] );
690 h->i_audio_channels = GetDWLE( &buffer[20] );
691 h->i_audio_compression_ratio = GetDWLE( &buffer[24] );
692 h->i_audio_quality = GetDWLE( &buffer[28] );
693 h->i_rtjpeg_quality = GetDWLE( &buffer[32] );
694 h->i_rtjpeg_luma_filter = GetDWLE( &buffer[36] );
695 h->i_rtjpeg_chroma_filter = GetDWLE( &buffer[40] );
696 h->i_lavc_bitrate = GetDWLE( &buffer[44] );
697 h->i_lavc_qmin = GetDWLE( &buffer[48] );
698 h->i_lavc_qmin = GetDWLE( &buffer[52] );
699 h->i_lavc_maxqdiff = GetDWLE( &buffer[56] );
700 h->i_seektable_offset = GetQWLE( &buffer[60] );
701 h->i_keyframe_adjust_offset= GetQWLE( &buffer[68] );
703 msg_Dbg( p_demux, "ex hdr: v=%d vffc=%4.4s afcc=%4.4s %dHz %dbits ach=%d acr=%d aq=%d"
704 "rtjpeg q=%d lf=%d lc=%d lavc br=%d qmin=%d qmax=%d maxqdiff=%d seekableoff=%"PRIi64" keyfao=%"PRIi64,
706 (char*)&h->i_video_fcc,
707 (char*)&h->i_audio_fcc, h->i_audio_sample_rate, h->i_audio_bits_per_sample, h->i_audio_channels,
708 h->i_audio_compression_ratio, h->i_audio_quality,
709 h->i_rtjpeg_quality, h->i_rtjpeg_luma_filter, h->i_rtjpeg_chroma_filter,
710 h->i_lavc_bitrate, h->i_lavc_qmin, h->i_lavc_qmax, h->i_lavc_maxqdiff,
711 h->i_seektable_offset, h->i_keyframe_adjust_offset );
719 int64_t i_file_offset;
720 int32_t i_keyframe_number;
725 int32_t i_keyframe_number;
729 static int SeekTableLoad( demux_t *p_demux, demux_sys_t *p_sys )
732 int64_t i_original_pos;
733 int64_t i_time, i_offset;
734 int keyframe, last_keyframe = 0, frame = 0, kfa_entry_id = 0;
736 if( p_sys->exh.i_seektable_offset <= 0 )
739 /* Save current position */
740 i_original_pos = stream_Tell( p_demux->s );
742 msg_Dbg( p_demux, "current offset %"PRIi64, i_original_pos );
744 msg_Dbg( p_demux, "seeking in stream to %"PRIi64, p_sys->exh.i_seektable_offset );
746 if( stream_Seek( p_demux->s, p_sys->exh.i_seektable_offset ) )
749 if( FrameHeaderLoad( p_demux, &fh ) )
752 if( fh.i_type != 'Q' )
754 msg_Warn( p_demux, "invalid seektable, frame type=%c", fh.i_type );
755 stream_Seek( p_demux->s, i_original_pos );
760 uint8_t *p_seek_table = malloc( fh.i_length );
761 if( p_seek_table == NULL )
764 if( stream_Read( p_demux->s, p_seek_table, fh.i_length ) != fh.i_length )
766 free( p_seek_table );
769 const int32_t i_seek_elements = fh.i_length / 12;
771 /* Get keyframe adjust offsets */
772 int32_t i_kfa_elements = 0;
773 uint8_t *p_kfa_table = NULL;
775 if( p_sys->exh.i_keyframe_adjust_offset > 0 )
777 msg_Dbg( p_demux, "seeking in stream to %"PRIi64, p_sys->exh.i_keyframe_adjust_offset );
778 if( stream_Seek( p_demux->s, p_sys->exh.i_keyframe_adjust_offset ) )
780 free( p_seek_table );
784 if( FrameHeaderLoad( p_demux, &fh ) )
786 free( p_seek_table );
790 if( fh.i_type == 'K' && fh.i_length >= 8 )
792 p_kfa_table = malloc( fh.i_length );
794 if( p_kfa_table == NULL )
796 free( p_seek_table );
800 if( stream_Read( p_demux->s, p_kfa_table, fh.i_length ) != fh.i_length )
802 free( p_seek_table );
807 i_kfa_elements = fh.i_length / 8;
811 if( i_kfa_elements > 0 )
812 msg_Warn( p_demux, "untested keyframe adjust support, upload samples" );
814 for( int32_t j = 0; j < i_seek_elements; j++)
817 uint8_t* p = p_seek_table + j * 12;
818 msg_Dbg( p_demux, "%x %x %x %x %x %x %x %x %x %x %x %x",
819 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8], p[9], p[10], p[11]);
821 keyframe = GetDWLE( p_seek_table + j * 12 + 8 );
823 frame += (keyframe - last_keyframe) * p_sys->hdr.i_keyframe_distance;
825 if( kfa_entry_id < i_kfa_elements && *(int32_t*)(p_kfa_table + kfa_entry_id * 12 + 4) == j )
827 frame -= *(int32_t*)(p_kfa_table + kfa_entry_id * 12);
828 msg_Dbg( p_demux, "corrected keyframe %d with current frame number %d (corrected with %d)",
829 keyframe, frame, *(int32_t*)(p_kfa_table + kfa_entry_id * 12) );
833 i_time = (double)( (int64_t)frame * 1000000 ) / p_sys->hdr.d_fps;
834 i_offset = GetQWLE( p_seek_table + j * 12 );
836 if( i_offset == 0 && i_time != 0 )
837 msg_Dbg( p_demux, "invalid file offset %d %"PRIi64, keyframe, i_offset );
840 demux_IndexAppend( &p_sys->idx, i_time , i_offset );
842 msg_Dbg( p_demux, "adding entry position %d %"PRIi64 " file offset %"PRIi64, keyframe, i_time, i_offset );
846 last_keyframe = keyframe;
849 p_sys->i_total_frames = (int64_t)frame;
851 p_sys->b_index = true;
853 p_sys->i_total_length = p_sys->i_total_frames * 1000000 / p_sys->hdr.d_fps;
855 msg_Dbg( p_demux, "index table loaded (%d elements)", i_seek_elements );
858 free ( p_kfa_table );
860 free ( p_seek_table );
862 /* Restore stream position */
863 if( stream_Seek( p_demux->s, i_original_pos ) )
870 /*****************************************************************************/
871 #define DEMUX_INDEX_SIZE_MAX (100000)
872 static void demux_IndexInit( demux_index_t *p_idx )
875 p_idx->i_idx_max = 0;
878 static void demux_IndexClean( demux_index_t *p_idx )
883 static void demux_IndexAppend( demux_index_t *p_idx,
884 int64_t i_time, int64_t i_offset )
886 /* Be sure to append new entry (we don't insert point) */
887 if( p_idx->i_idx > 0 && p_idx->idx[p_idx->i_idx-1].i_time >= i_time )
891 if( p_idx->i_idx >= p_idx->i_idx_max )
893 if( p_idx->i_idx >= DEMUX_INDEX_SIZE_MAX )
895 /* Avoid too big index */
896 const int64_t i_length = p_idx->idx[p_idx->i_idx-1].i_time -
897 p_idx->idx[0].i_time;
898 const int i_count = DEMUX_INDEX_SIZE_MAX/2;
901 /* We try to reduce the resolution of the index by a factor 2 */
902 for( i = 1, j = 1; i < p_idx->i_idx; i++ )
904 if( p_idx->idx[i].i_time < j * i_length / i_count )
907 p_idx->idx[j++] = p_idx->idx[i];
911 if( p_idx->i_idx > 3 * DEMUX_INDEX_SIZE_MAX / 4 )
913 /* We haven't created enough space
914 * (This method won't create a good index but work for sure) */
915 for( i = 0; i < p_idx->i_idx/2; i++ )
916 p_idx->idx[i] = p_idx->idx[2*i];
922 p_idx->i_idx_max += 1000;
923 p_idx->idx = xrealloc( p_idx->idx,
924 p_idx->i_idx_max*sizeof(demux_index_entry_t));
929 p_idx->idx[p_idx->i_idx].i_time = i_time;
930 p_idx->idx[p_idx->i_idx].i_offset = i_offset;
934 static int64_t demux_IndexConvertTime( demux_index_t *p_idx, int64_t i_time )
937 int i_max = p_idx->i_idx-1;
940 if( p_idx->i_idx <= 0 )
943 /* Special border case */
944 if( i_time <= p_idx->idx[0].i_time )
945 return p_idx->idx[0].i_offset;
946 if( i_time >= p_idx->idx[i_max].i_time )
947 return p_idx->idx[i_max].i_offset;
954 if( i_max - i_min <= 1 )
957 i_med = (i_min+i_max)/2;
958 if( p_idx->idx[i_med].i_time < i_time )
960 else if( p_idx->idx[i_med].i_time > i_time )
963 return p_idx->idx[i_med].i_offset;
966 /* return nearest in time */
967 if( i_time - p_idx->idx[i_min].i_time < p_idx->idx[i_max].i_time - i_time )
968 return p_idx->idx[i_min].i_offset;
970 return p_idx->idx[i_max].i_offset;
974 static int64_t demux_IndexFindOffset( demux_index_t *p_idx, int64_t i_offset )
977 int i_max = p_idx->i_idx-1;
980 if( p_idx->i_idx <= 0 )
983 /* Special border case */
984 if( i_offset <= p_idx->idx[0].i_offset )
985 return p_idx->idx[0].i_offset;
986 if( i_offset == p_idx->idx[i_max].i_offset )
987 return p_idx->idx[i_max].i_offset;
988 if( i_offset > p_idx->idx[i_max].i_offset )
996 if( i_max - i_min <= 1 )
999 i_med = (i_min+i_max)/2;
1000 if( p_idx->idx[i_med].i_offset < i_offset )
1002 else if( p_idx->idx[i_med].i_offset > i_offset )
1005 return p_idx->idx[i_med].i_offset;
1008 /* return nearest */
1009 if( i_offset - p_idx->idx[i_min].i_offset < p_idx->idx[i_max].i_offset - i_offset )
1010 return p_idx->idx[i_min].i_offset;
1012 return p_idx->idx[i_max].i_offset;