1 /*****************************************************************************
2 * h264.c: h264/avc video packetizer
3 *****************************************************************************
4 * Copyright (C) 2001, 2002, 2006 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Eric Petit <titer@videolan.org>
9 * Gildas Bazin <gbazin@videolan.org>
10 * Derk-Jan Hartman <hartman at videolan dot org>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
27 /*****************************************************************************
29 *****************************************************************************/
37 #include <vlc_codec.h>
38 #include <vlc_block.h>
40 #include "vlc_block_helper.h"
43 /*****************************************************************************
45 *****************************************************************************/
46 static int Open ( vlc_object_t * );
47 static void Close( vlc_object_t * );
50 set_category( CAT_SOUT );
51 set_subcategory( SUBCAT_SOUT_PACKETIZER );
52 set_description( _("H.264 video packetizer") );
53 set_capability( "packetizer", 50 );
54 set_callbacks( Open, Close );
58 /****************************************************************************
60 ****************************************************************************/
61 static block_t *Packetize( decoder_t *, block_t ** );
62 static block_t *PacketizeAVC1( decoder_t *, block_t ** );
70 int i_pic_parameter_set_id;
74 int i_bottom_field_flag;
78 int i_pic_order_cnt_lsb;
79 int i_delta_pic_order_cnt_bottom;
81 int i_delta_pic_order_cnt0;
82 int i_delta_pic_order_cnt1;
87 block_bytestream_t bytestream;
101 int i_avcC_length_size;
105 /* Useful values of the Sequence Parameter Set */
106 int i_log2_max_frame_num;
107 int b_frame_mbs_only;
108 int i_pic_order_cnt_type;
109 int i_delta_pic_order_always_zero_flag;
110 int i_log2_max_pic_order_cnt_lsb;
112 /* Value from Picture Parameter Set */
113 int i_pic_order_present_flag;
115 /* Useful values of the Slice Header */
132 NAL_SLICE_IDR = 5, /* ref_idc != 0 */
133 NAL_SEI = 6, /* ref_idc == 0 */
137 /* ref_idc == 0 for 6,9,10,11,12 */
142 NAL_PRIORITY_DISPOSABLE = 0,
143 NAL_PRIORITY_LOW = 1,
144 NAL_PRIORITY_HIGH = 2,
145 NAL_PRIORITY_HIGHEST = 3,
148 static block_t *ParseNALBlock( decoder_t *, block_t * );
150 static block_t *nal_get_annexeb( decoder_t *, uint8_t *p, int );
152 /*****************************************************************************
153 * Open: probe the packetizer and return score
154 * When opening after demux, the packetizer is only loaded AFTER the decoder
155 * That means that what you set in fmt_out is ignored by the decoder in this special case
156 *****************************************************************************/
157 static int Open( vlc_object_t *p_this )
159 decoder_t *p_dec = (decoder_t*)p_this;
160 decoder_sys_t *p_sys;
162 if( p_dec->fmt_in.i_codec != VLC_FOURCC( 'h', '2', '6', '4') &&
163 p_dec->fmt_in.i_codec != VLC_FOURCC( 'H', '2', '6', '4') &&
164 p_dec->fmt_in.i_codec != VLC_FOURCC( 'V', 'S', 'S', 'H') &&
165 p_dec->fmt_in.i_codec != VLC_FOURCC( 'v', 's', 's', 'h') &&
166 p_dec->fmt_in.i_codec != VLC_FOURCC( 'D', 'A', 'V', 'C') &&
167 ( p_dec->fmt_in.i_codec != VLC_FOURCC( 'a', 'v', 'c', '1') ||
168 p_dec->fmt_in.i_extra < 7 ) )
173 /* Allocate the memory needed to store the decoder's structure */
174 if( ( p_dec->p_sys = p_sys = malloc( sizeof(decoder_sys_t) ) ) == NULL )
176 msg_Err( p_dec, "out of memory" );
179 p_sys->i_state = STATE_NOSYNC;
181 p_sys->startcode[0] = 0;
182 p_sys->startcode[1] = 0;
183 p_sys->startcode[2] = 0;
184 p_sys->startcode[3] = 1;
185 p_sys->bytestream = block_BytestreamInit();
186 p_sys->b_slice = false;
187 p_sys->p_frame = NULL;
188 p_sys->b_sps = false;
189 p_sys->b_pps = false;
192 p_sys->b_header= false;
194 p_sys->slice.i_nal_type = -1;
195 p_sys->slice.i_nal_ref_idc = -1;
196 p_sys->slice.i_idr_pic_id = -1;
197 p_sys->slice.i_frame_num = -1;
198 p_sys->slice.i_frame_type = 0;
199 p_sys->slice.i_pic_parameter_set_id = -1;
200 p_sys->slice.i_field_pic_flag = 0;
201 p_sys->slice.i_bottom_field_flag = -1;
202 p_sys->slice.i_pic_order_cnt_lsb = -1;
203 p_sys->slice.i_delta_pic_order_cnt_bottom = -1;
205 /* Setup properties */
206 es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
207 p_dec->fmt_out.i_codec = VLC_FOURCC( 'h', '2', '6', '4' );
209 if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'a', 'v', 'c', '1' ) )
211 /* This type of stream is produced by mp4 and matroska
212 * when we want to store it in another streamformat, you need to convert
213 * The fmt_in.p_extra should ALWAYS contain the avcC
214 * The fmt_out.p_extra should contain all the SPS and PPS with 4 byte startcodes */
215 uint8_t *p = &((uint8_t*)p_dec->fmt_in.p_extra)[4];
220 p_sys->i_avcC_length_size = 1 + ((*p++)&0x03);
224 for( i = 0; i < i_sps; i++ )
226 uint16_t i_length = GetWBE( p ); p += 2;
228 (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
232 block_t *p_sps = nal_get_annexeb( p_dec, p, i_length );
235 p_sys->p_sps = block_Duplicate( p_sps );
236 p_sps->i_pts = p_sps->i_dts = mdate();
237 ParseNALBlock( p_dec, p_sps );
242 for( i = 0; i < i_pps; i++ )
244 uint16_t i_length = GetWBE( p ); p += 2;
246 (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
250 block_t *p_pps = nal_get_annexeb( p_dec, p, i_length );
253 p_sys->p_pps = block_Duplicate( p_pps );
254 p_pps->i_pts = p_pps->i_dts = mdate();
255 ParseNALBlock( p_dec, p_pps );
258 msg_Dbg( p_dec, "avcC length size=%d, sps=%d, pps=%d",
259 p_sys->i_avcC_length_size, i_sps, i_pps );
261 /* FIXME: FFMPEG isn't happy at all if you leave this */
262 if( p_dec->fmt_out.i_extra ) free( p_dec->fmt_out.p_extra );
263 p_dec->fmt_out.i_extra = 0; p_dec->fmt_out.p_extra = NULL;
265 /* Set the new extradata */
266 p_dec->fmt_out.i_extra = p_sys->p_pps->i_buffer + p_sys->p_sps->i_buffer;
267 p_dec->fmt_out.p_extra = (uint8_t*)malloc( p_dec->fmt_out.i_extra );
268 if( p_dec->fmt_out.p_extra )
270 memcpy( (uint8_t*)p_dec->fmt_out.p_extra, p_sys->p_sps->p_buffer, p_sys->p_sps->i_buffer);
271 memcpy( (uint8_t*)p_dec->fmt_out.p_extra+p_sys->p_sps->i_buffer, p_sys->p_pps->p_buffer, p_sys->p_pps->i_buffer);
272 p_sys->b_header = true;
274 else p_dec->fmt_out.i_extra = 0;
277 p_dec->pf_packetize = PacketizeAVC1;
281 /* This type of stream contains data with 3 of 4 byte startcodes
282 * The fmt_in.p_extra MAY contain SPS/PPS with 4 byte startcodes
283 * The fmt_out.p_extra should be the same */
286 p_dec->pf_packetize = Packetize;
289 if( p_dec->fmt_in.i_extra > 0 )
291 block_t *p_init = block_New( p_dec, p_dec->fmt_in.i_extra );
294 memcpy( p_init->p_buffer, p_dec->fmt_in.p_extra,
295 p_dec->fmt_in.i_extra );
297 while( ( p_pic = Packetize( p_dec, &p_init ) ) )
299 /* Should not occur because we should only receive SPS/PPS */
300 block_Release( p_pic );
308 /*****************************************************************************
309 * Close: clean up the packetizer
310 *****************************************************************************/
311 static void Close( vlc_object_t *p_this )
313 decoder_t *p_dec = (decoder_t*)p_this;
314 decoder_sys_t *p_sys = p_dec->p_sys;
316 if( p_sys->p_frame ) block_ChainRelease( p_sys->p_frame );
317 if( p_sys->p_sps ) block_Release( p_sys->p_sps );
318 if( p_sys->p_pps ) block_Release( p_sys->p_pps );
319 block_BytestreamRelease( &p_sys->bytestream );
323 /****************************************************************************
324 * Packetize: the whole thing
325 * Search for the startcodes 3 or more bytes
326 * Feed ParseNALBlock ALWAYS with 4 byte startcode prepended NALs
327 ****************************************************************************/
328 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
330 decoder_sys_t *p_sys = p_dec->p_sys;
333 if( !pp_block || !*pp_block )
336 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
338 if( (*pp_block)->i_flags&BLOCK_FLAG_CORRUPTED )
340 p_sys->i_state = STATE_NOSYNC;
341 block_BytestreamFlush( &p_sys->bytestream );
344 block_ChainRelease( p_sys->p_frame );
345 p_sys->p_frame = NULL;
346 p_sys->slice.i_frame_type = 0;
347 p_sys->b_slice = false;
349 block_Release( *pp_block );
353 block_BytestreamPush( &p_sys->bytestream, *pp_block );
357 switch( p_sys->i_state )
360 /* Skip until 3 byte startcode 0 0 1 */
361 if( block_FindStartcodeFromOffset( &p_sys->bytestream,
362 &p_sys->i_offset, p_sys->startcode+1, 3 ) == VLC_SUCCESS)
364 p_sys->i_state = STATE_NEXT_SYNC;
367 if( p_sys->i_offset )
370 block_SkipBytes( &p_sys->bytestream, p_sys->i_offset );
372 block_BytestreamFlush( &p_sys->bytestream );
375 if( p_sys->i_state != STATE_NEXT_SYNC )
381 p_sys->i_offset = 1; /* To find next startcode */
383 case STATE_NEXT_SYNC:
384 /* Find the next 3 byte startcode 0 0 1*/
385 if( block_FindStartcodeFromOffset( &p_sys->bytestream,
386 &p_sys->i_offset, p_sys->startcode+1, 3 ) != VLC_SUCCESS)
392 /* Get the new fragment and set the pts/dts */
393 p_pic = block_New( p_dec, p_sys->i_offset +1 );
394 p_pic->i_pts = p_sys->bytestream.p_block->i_pts;
395 p_pic->i_dts = p_sys->bytestream.p_block->i_dts;
396 /* Force 4 byte startcode 0 0 0 1 */
397 p_pic->p_buffer[0] = 0;
399 block_GetBytes( &p_sys->bytestream, &p_pic->p_buffer[1],
402 /* Remove trailing 0 bytes */
403 while( p_pic->i_buffer && (!p_pic->p_buffer[p_pic->i_buffer-1] ) )
408 if( !( p_pic = ParseNALBlock( p_dec, p_pic ) ) )
410 p_sys->i_state = STATE_NOSYNC;
414 msg_Dbg( p_dec, "pts="I64Fd" dts="I64Fd,
415 p_pic->i_pts, p_pic->i_dts );
418 /* So p_block doesn't get re-added several times */
419 *pp_block = block_BytestreamPop( &p_sys->bytestream );
421 p_sys->i_state = STATE_NOSYNC;
428 /****************************************************************************
429 * PacketizeAVC1: Takes VCL blocks of data and creates annexe B type NAL stream
430 * Will always use 4 byte 0 0 0 1 startcodes
431 * Will prepend a SPS and PPS before each keyframe
432 ****************************************************************************/
433 static block_t *PacketizeAVC1( decoder_t *p_dec, block_t **pp_block )
435 decoder_sys_t *p_sys = p_dec->p_sys;
437 block_t *p_ret = NULL;
440 if( !pp_block || !*pp_block )
442 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
444 block_Release( *pp_block );
451 for( p = p_block->p_buffer; p < &p_block->p_buffer[p_block->i_buffer]; )
457 for( i = 0; i < p_sys->i_avcC_length_size; i++ )
459 i_size = (i_size << 8) | (*p++);
463 i_size > ( p_block->p_buffer + p_block->i_buffer - p ) )
465 msg_Err( p_dec, "Broken frame : size %d is too big", i_size );
469 block_t *p_part = nal_get_annexeb( p_dec, p, i_size );
472 p_part->i_dts = p_block->i_dts;
473 p_part->i_pts = p_block->i_pts;
476 if( ( p_pic = ParseNALBlock( p_dec, p_part ) ) )
478 block_ChainAppend( &p_ret, p_pic );
482 block_Release( p_block );
487 static block_t *nal_get_annexeb( decoder_t *p_dec, uint8_t *p, int i_size )
491 p_nal = block_New( p_dec, 4 + i_size );
492 if( !p_nal ) return NULL;
495 p_nal->p_buffer[0] = 0x00;
496 p_nal->p_buffer[1] = 0x00;
497 p_nal->p_buffer[2] = 0x00;
498 p_nal->p_buffer[3] = 0x01;
501 memcpy( &p_nal->p_buffer[4], p, i_size );
506 static void nal_get_decoded( uint8_t **pp_ret, int *pi_ret,
507 uint8_t *src, int i_src )
509 uint8_t *end = &src[i_src];
510 uint8_t *dst = malloc( i_src );
518 if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
530 *pi_ret = dst - *pp_ret;
533 static inline int bs_read_ue( bs_t *s )
537 while( bs_read1( s ) == 0 && s->p < s->p_end && i < 32 )
541 return( ( 1 << i) - 1 + bs_read( s, i ) );
544 static inline int bs_read_se( bs_t *s )
546 int val = bs_read_ue( s );
548 return val&0x01 ? (val+1)/2 : -(val/2);
551 /*****************************************************************************
552 * ParseNALBlock: parses annexB type NALs
553 * All p_frag blocks are required to start with 0 0 0 1 4-byte startcode
554 *****************************************************************************/
555 static block_t *ParseNALBlock( decoder_t *p_dec, block_t *p_frag )
557 decoder_sys_t *p_sys = p_dec->p_sys;
558 block_t *p_pic = NULL;
560 const int i_nal_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
561 const int i_nal_type = p_frag->p_buffer[4]&0x1f;
565 if( !p_sys->b_header && p_sys->slice.i_frame_type != BLOCK_FLAG_TYPE_I) \
568 if( p_sys->slice.i_frame_type == BLOCK_FLAG_TYPE_I && p_sys->p_sps && p_sys->p_pps ) \
570 block_t *p_sps = block_Duplicate( p_sys->p_sps ); \
571 block_t *p_pps = block_Duplicate( p_sys->p_pps ); \
572 p_sps->i_dts = p_sys->p_frame->i_dts; \
573 p_sps->i_pts = p_sys->p_frame->i_pts; \
574 block_ChainAppend( &p_sps, p_pps ); \
575 block_ChainAppend( &p_sps, p_sys->p_frame ); \
576 p_sys->b_header = true; \
577 p_pic = block_ChainGather( p_sps ); \
579 p_pic = block_ChainGather( p_sys->p_frame ); \
581 p_pic->i_length = 0; /* FIXME */ \
582 p_pic->i_flags |= p_sys->slice.i_frame_type; \
584 p_sys->slice.i_frame_type = 0; \
585 p_sys->p_frame = NULL; \
586 p_sys->b_slice = false; \
589 if( p_sys->b_slice && ( !p_sys->b_sps || !p_sys->b_pps ) )
591 block_ChainRelease( p_sys->p_frame );
592 msg_Warn( p_dec, "waiting for SPS/PPS" );
595 p_sys->slice.i_frame_type = 0;
596 p_sys->p_frame = NULL;
597 p_sys->b_slice = false;
600 if( ( !p_sys->b_sps || !p_sys->b_pps ) &&
601 i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
603 p_sys->b_slice = true;
604 /* Fragment will be discarded later on */
606 else if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
609 int i_dec = 0, i_first_mb, i_slice_type;
614 /* do not convert the whole frame */
615 nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[5],
616 __MIN( p_frag->i_buffer - 5, 60 ) );
617 bs_init( &s, dec, i_dec );
619 /* first_mb_in_slice */
620 i_first_mb = bs_read_ue( &s );
623 switch( (i_slice_type = bs_read_ue( &s )) )
626 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
629 slice.i_frame_type = BLOCK_FLAG_TYPE_B;
632 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
634 case 3: case 8: /* SP */
635 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
638 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
641 slice.i_frame_type = 0;
646 slice.i_nal_type = i_nal_type;
647 slice.i_nal_ref_idc = i_nal_ref_idc;
649 slice.i_pic_parameter_set_id = bs_read_ue( &s );
650 slice.i_frame_num = bs_read( &s, p_sys->i_log2_max_frame_num + 4 );
652 slice.i_field_pic_flag = 0;
653 slice.i_bottom_field_flag = -1;
654 if( !p_sys->b_frame_mbs_only )
657 slice.i_field_pic_flag = bs_read( &s, 1 );
658 if( slice.i_field_pic_flag )
659 slice.i_bottom_field_flag = bs_read( &s, 1 );
662 slice.i_idr_pic_id = p_sys->slice.i_idr_pic_id;
663 if( slice.i_nal_type == NAL_SLICE_IDR )
664 slice.i_idr_pic_id = bs_read_ue( &s );
666 slice.i_pic_order_cnt_lsb = -1;
667 slice.i_delta_pic_order_cnt_bottom = -1;
668 slice.i_delta_pic_order_cnt0 = 0;
669 slice.i_delta_pic_order_cnt1 = 0;
670 if( p_sys->i_pic_order_cnt_type == 0 )
672 slice.i_pic_order_cnt_lsb = bs_read( &s, p_sys->i_log2_max_pic_order_cnt_lsb + 4 );
673 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
674 slice.i_delta_pic_order_cnt_bottom = bs_read_se( &s );
676 else if( (p_sys->i_pic_order_cnt_type == 1) &&
677 (!p_sys->i_delta_pic_order_always_zero_flag) )
679 slice.i_delta_pic_order_cnt0 = bs_read_se( &s );
680 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
681 slice.i_delta_pic_order_cnt1 = bs_read_se( &s );
684 /* Detection of the first VCL NAL unit of a primary coded picture
687 if( slice.i_frame_num != p_sys->slice.i_frame_num ||
688 slice.i_pic_parameter_set_id != p_sys->slice.i_pic_parameter_set_id ||
689 slice.i_field_pic_flag != p_sys->slice.i_field_pic_flag ||
690 slice.i_nal_ref_idc != p_sys->slice.i_nal_ref_idc )
692 if( (slice.i_bottom_field_flag != -1) &&
693 (p_sys->slice.i_bottom_field_flag != -1) &&
694 (slice.i_bottom_field_flag != p_sys->slice.i_bottom_field_flag) )
696 if( p_sys->i_pic_order_cnt_type == 0 &&
697 ( slice.i_pic_order_cnt_lsb != p_sys->slice.i_pic_order_cnt_lsb ||
698 slice.i_delta_pic_order_cnt_bottom != p_sys->slice.i_delta_pic_order_cnt_bottom ) )
700 else if( p_sys->i_pic_order_cnt_type == 1 &&
701 ( slice.i_delta_pic_order_cnt0 != p_sys->slice.i_delta_pic_order_cnt0 ||
702 slice.i_delta_pic_order_cnt1 != p_sys->slice.i_delta_pic_order_cnt1 ) )
704 if( ( slice.i_nal_type == NAL_SLICE_IDR || p_sys->slice.i_nal_type == NAL_SLICE_IDR ) &&
705 ( slice.i_nal_type != p_sys->slice.i_nal_type || slice.i_idr_pic_id != p_sys->slice.i_idr_pic_id ) )
709 p_sys->slice = slice;
711 if( b_pic && p_sys->b_slice )
714 p_sys->b_slice = true;
718 else if( i_nal_type == NAL_SPS )
725 if( !p_sys->b_sps ) msg_Dbg( p_dec, "found NAL_SPS" );
729 nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[5],
730 p_frag->i_buffer - 5 );
732 bs_init( &s, dec, i_dec );
733 /* Skip profile(8), constraint_set012, reserver(5), level(8) */
734 bs_skip( &s, 8 + 1+1+1 + 5 + 8 );
737 /* Skip i_log2_max_frame_num */
738 p_sys->i_log2_max_frame_num = bs_read_ue( &s );
739 if( p_sys->i_log2_max_frame_num > 12)
740 p_sys->i_log2_max_frame_num = 12;
742 p_sys->i_pic_order_cnt_type = bs_read_ue( &s );
743 if( p_sys->i_pic_order_cnt_type == 0 )
745 /* skip i_log2_max_poc_lsb */
746 p_sys->i_log2_max_pic_order_cnt_lsb = bs_read_ue( &s );
747 if( p_sys->i_log2_max_pic_order_cnt_lsb > 12 )
748 p_sys->i_log2_max_pic_order_cnt_lsb = 12;
750 else if( p_sys->i_pic_order_cnt_type == 1 )
753 /* skip b_delta_pic_order_always_zero */
754 p_sys->i_delta_pic_order_always_zero_flag = bs_read( &s, 1 );
755 /* skip i_offset_for_non_ref_pic */
757 /* skip i_offset_for_top_to_bottom_field */
759 /* read i_num_ref_frames_in_poc_cycle */
760 i_cycle = bs_read_ue( &s );
761 if( i_cycle > 256 ) i_cycle = 256;
764 /* skip i_offset_for_ref_frame */
768 /* i_num_ref_frames */
770 /* b_gaps_in_frame_num_value_allowed */
774 p_dec->fmt_out.video.i_width = 16 * ( bs_read_ue( &s ) + 1 );
775 p_dec->fmt_out.video.i_height = 16 * ( bs_read_ue( &s ) + 1 );
777 /* b_frame_mbs_only */
778 p_sys->b_frame_mbs_only = bs_read( &s, 1 );
779 if( p_sys->b_frame_mbs_only == 0 )
783 /* b_direct8x8_inference */
787 i_tmp = bs_read( &s, 1 );
801 i_tmp = bs_read( &s, 1 );
804 /* read the aspect ratio part if any FIXME check it */
805 i_tmp = bs_read( &s, 1 );
808 static const struct { int w, h; } sar[14] =
810 { 0, 0 }, { 1, 1 }, { 12, 11 }, { 10, 11 },
811 { 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 },
812 { 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 },
813 { 64, 33 }, { 160,99 },
815 int i_sar = bs_read( &s, 8 );
825 w = bs_read( &s, 16 );
826 h = bs_read( &s, 16 );
829 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR * w /
830 h * p_dec->fmt_out.video.i_width /
831 p_dec->fmt_out.video.i_height;
833 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR;
839 if( p_sys->b_slice ) OUTPUT;
841 /* We have a new SPS */
842 if( p_sys->p_sps ) block_Release( p_sys->p_sps );
843 p_sys->p_sps = p_frag;
845 /* Do not append the SPS because we will insert it on keyframes */
848 else if( i_nal_type == NAL_PPS )
852 bs_init( &s, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
853 bs_read_ue( &s ); // pps id
854 bs_read_ue( &s ); // sps id
855 bs_skip( &s, 1 ); // entropy coding mode flag
856 p_sys->i_pic_order_present_flag = bs_read( &s, 1 );
858 if( !p_sys->b_pps ) msg_Dbg( p_dec, "found NAL_PPS" );
863 if( p_sys->b_slice ) OUTPUT;
865 /* We have a new PPS */
866 if( p_sys->p_pps ) block_Release( p_sys->p_pps );
867 p_sys->p_pps = p_frag;
869 /* Do not append the PPS because we will insert it on keyframes */
872 else if( i_nal_type == NAL_AU_DELIMITER ||
873 i_nal_type == NAL_SEI ||
874 ( i_nal_type >= 13 && i_nal_type <= 18 ) )
876 if( p_sys->b_slice ) OUTPUT;
881 /* Append the block */
882 block_ChainAppend( &p_sys->p_frame, p_frag );