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 *****************************************************************************/
33 #include <vlc_codec.h>
34 #include <vlc_block.h>
36 #include "vlc_block_helper.h"
39 /*****************************************************************************
41 *****************************************************************************/
42 static int Open ( vlc_object_t * );
43 static void Close( vlc_object_t * );
46 set_category( CAT_SOUT );
47 set_subcategory( SUBCAT_SOUT_PACKETIZER );
48 set_description( _("H.264 video packetizer") );
49 set_capability( "packetizer", 50 );
50 set_callbacks( Open, Close );
54 /****************************************************************************
56 ****************************************************************************/
57 static block_t *Packetize( decoder_t *, block_t ** );
58 static block_t *PacketizeAVC1( decoder_t *, block_t ** );
66 int i_pic_parameter_set_id;
70 int i_bottom_field_flag;
74 int i_pic_order_cnt_lsb;
75 int i_delta_pic_order_cnt_bottom;
77 int i_delta_pic_order_cnt0;
78 int i_delta_pic_order_cnt1;
83 block_bytestream_t bytestream;
97 int i_avcC_length_size;
101 /* Useful values of the Sequence Parameter Set */
102 int i_log2_max_frame_num;
103 int b_frame_mbs_only;
104 int i_pic_order_cnt_type;
105 int i_delta_pic_order_always_zero_flag;
106 int i_log2_max_pic_order_cnt_lsb;
108 /* Value from Picture Parameter Set */
109 int i_pic_order_present_flag;
111 /* Useful values of the Slice Header */
128 NAL_SLICE_IDR = 5, /* ref_idc != 0 */
129 NAL_SEI = 6, /* ref_idc == 0 */
133 /* ref_idc == 0 for 6,9,10,11,12 */
138 NAL_PRIORITY_DISPOSABLE = 0,
139 NAL_PRIORITY_LOW = 1,
140 NAL_PRIORITY_HIGH = 2,
141 NAL_PRIORITY_HIGHEST = 3,
144 static block_t *ParseNALBlock( decoder_t *, block_t * );
146 static block_t *nal_get_annexeb( decoder_t *, uint8_t *p, int );
148 /*****************************************************************************
149 * Open: probe the packetizer and return score
150 * When opening after demux, the packetizer is only loaded AFTER the decoder
151 * That means that what you set in fmt_out is ignored by the decoder in this special case
152 *****************************************************************************/
153 static int Open( vlc_object_t *p_this )
155 decoder_t *p_dec = (decoder_t*)p_this;
156 decoder_sys_t *p_sys;
158 if( p_dec->fmt_in.i_codec != VLC_FOURCC( 'h', '2', '6', '4') &&
159 p_dec->fmt_in.i_codec != VLC_FOURCC( 'H', '2', '6', '4') &&
160 p_dec->fmt_in.i_codec != VLC_FOURCC( 'V', 'S', 'S', 'H') &&
161 p_dec->fmt_in.i_codec != VLC_FOURCC( 'v', 's', 's', 'h') &&
162 p_dec->fmt_in.i_codec != VLC_FOURCC( 'D', 'A', 'V', 'C') &&
163 ( p_dec->fmt_in.i_codec != VLC_FOURCC( 'a', 'v', 'c', '1') ||
164 p_dec->fmt_in.i_extra < 7 ) )
169 /* Allocate the memory needed to store the decoder's structure */
170 if( ( p_dec->p_sys = p_sys = malloc( sizeof(decoder_sys_t) ) ) == NULL )
172 msg_Err( p_dec, "out of memory" );
175 p_sys->i_state = STATE_NOSYNC;
177 p_sys->startcode[0] = 0;
178 p_sys->startcode[1] = 0;
179 p_sys->startcode[2] = 0;
180 p_sys->startcode[3] = 1;
181 p_sys->bytestream = block_BytestreamInit( p_dec );
182 p_sys->b_slice = VLC_FALSE;
183 p_sys->p_frame = NULL;
184 p_sys->b_sps = VLC_FALSE;
185 p_sys->b_pps = VLC_FALSE;
188 p_sys->b_header= VLC_FALSE;
190 p_sys->slice.i_nal_type = -1;
191 p_sys->slice.i_nal_ref_idc = -1;
192 p_sys->slice.i_idr_pic_id = -1;
193 p_sys->slice.i_frame_num = -1;
194 p_sys->slice.i_frame_type = 0;
195 p_sys->slice.i_pic_parameter_set_id = -1;
196 p_sys->slice.i_field_pic_flag = 0;
197 p_sys->slice.i_bottom_field_flag = -1;
198 p_sys->slice.i_pic_order_cnt_lsb = -1;
199 p_sys->slice.i_delta_pic_order_cnt_bottom = -1;
201 /* Setup properties */
202 es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
203 p_dec->fmt_out.i_codec = VLC_FOURCC( 'h', '2', '6', '4' );
205 if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'a', 'v', 'c', '1' ) )
207 /* This type of stream is produced by mp4 and matroska
208 * when we want to store it in another streamformat, you need to convert
209 * The fmt_in.p_extra should ALWAYS contain the avcC
210 * The fmt_out.p_extra should contain all the SPS and PPS with 4 byte startcodes */
211 uint8_t *p = &((uint8_t*)p_dec->fmt_in.p_extra)[4];
216 p_sys->i_avcC_length_size = 1 + ((*p++)&0x03);
220 for( i = 0; i < i_sps; i++ )
222 int i_length = GetWBE( p );
223 block_t *p_sps = nal_get_annexeb( p_dec, p + 2, i_length );
225 p_sys->p_sps = block_Duplicate( p_sps );
226 p_sps->i_pts = p_sps->i_dts = mdate();
227 ParseNALBlock( p_dec, p_sps );
232 for( i = 0; i < i_pps; i++ )
234 int i_length = GetWBE( p );
235 block_t *p_pps = nal_get_annexeb( p_dec, p + 2, i_length );
237 p_sys->p_pps = block_Duplicate( p_pps );
238 p_pps->i_pts = p_pps->i_dts = mdate();
239 ParseNALBlock( p_dec, p_pps );
242 msg_Dbg( p_dec, "avcC length size=%d, sps=%d, pps=%d",
243 p_sys->i_avcC_length_size, i_sps, i_pps );
245 /* FIXME: FFMPEG isn't happy at all if you leave this */
246 if( p_dec->fmt_out.i_extra ) free( p_dec->fmt_out.p_extra );
247 p_dec->fmt_out.i_extra = 0; p_dec->fmt_out.p_extra = NULL;
249 /* Set the new extradata */
250 p_dec->fmt_out.p_extra = (uint8_t*)malloc( p_dec->fmt_out.i_extra );
251 if( p_dec->fmt_out.p_extra )
253 p_dec->fmt_out.i_extra = p_sys->p_pps->i_buffer + p_sys->p_sps->i_buffer;
254 memcpy( (uint8_t*)p_dec->fmt_out.p_extra, p_sys->p_sps->p_buffer, p_sys->p_sps->i_buffer);
255 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);
256 p_sys->b_header = VLC_TRUE;
259 p_dec->pf_packetize = PacketizeAVC1;
263 /* This type of stream contains data with 3 of 4 byte startcodes
264 * The fmt_in.p_extra MAY contain SPS/PPS with 4 byte startcodes
265 * The fmt_out.p_extra should be the same */
268 p_dec->pf_packetize = Packetize;
271 if( p_dec->fmt_in.i_extra > 0 )
273 block_t *p_init = block_New( p_dec, p_dec->fmt_in.i_extra );
276 memcpy( p_init->p_buffer, p_dec->fmt_in.p_extra,
277 p_dec->fmt_in.i_extra );
279 while( ( p_pic = Packetize( p_dec, &p_init ) ) )
281 /* Should not occur because we should only receive SPS/PPS */
282 block_Release( p_pic );
290 /*****************************************************************************
291 * Close: clean up the packetizer
292 *****************************************************************************/
293 static void Close( vlc_object_t *p_this )
295 decoder_t *p_dec = (decoder_t*)p_this;
296 decoder_sys_t *p_sys = p_dec->p_sys;
298 if( p_sys->p_frame ) block_ChainRelease( p_sys->p_frame );
299 if( p_sys->p_sps ) block_Release( p_sys->p_sps );
300 if( p_sys->p_pps ) block_Release( p_sys->p_pps );
301 block_BytestreamRelease( &p_sys->bytestream );
305 /****************************************************************************
306 * Packetize: the whole thing
307 * Search for the startcodes 3 or more bytes
308 * Feed ParseNALBlock ALWAYS with 4 byte startcode prepended NALs
309 ****************************************************************************/
310 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
312 decoder_sys_t *p_sys = p_dec->p_sys;
315 if( !pp_block || !*pp_block )
318 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
320 if( (*pp_block)->i_flags&BLOCK_FLAG_CORRUPTED )
322 p_sys->i_state = STATE_NOSYNC;
323 block_BytestreamFlush( &p_sys->bytestream );
326 block_ChainRelease( p_sys->p_frame );
327 p_sys->p_frame = NULL;
328 p_sys->slice.i_frame_type = 0;
329 p_sys->b_slice = VLC_FALSE;
331 block_Release( *pp_block );
335 block_BytestreamPush( &p_sys->bytestream, *pp_block );
339 switch( p_sys->i_state )
342 /* Skip until 3 byte startcode 0 0 1 */
343 if( block_FindStartcodeFromOffset( &p_sys->bytestream,
344 &p_sys->i_offset, p_sys->startcode+1, 3 ) == VLC_SUCCESS)
346 p_sys->i_state = STATE_NEXT_SYNC;
349 if( p_sys->i_offset )
352 block_SkipBytes( &p_sys->bytestream, p_sys->i_offset );
354 block_BytestreamFlush( &p_sys->bytestream );
357 if( p_sys->i_state != STATE_NEXT_SYNC )
363 p_sys->i_offset = 1; /* To find next startcode */
365 case STATE_NEXT_SYNC:
366 /* Find the next 3 byte startcode 0 0 1*/
367 if( block_FindStartcodeFromOffset( &p_sys->bytestream,
368 &p_sys->i_offset, p_sys->startcode+1, 3 ) != VLC_SUCCESS)
374 /* Get the new fragment and set the pts/dts */
375 p_pic = block_New( p_dec, p_sys->i_offset +1 );
376 p_pic->i_pts = p_sys->bytestream.p_block->i_pts;
377 p_pic->i_dts = p_sys->bytestream.p_block->i_dts;
378 /* Force 4 byte startcode 0 0 0 1 */
379 p_pic->p_buffer[0] = 0;
381 block_GetBytes( &p_sys->bytestream, &p_pic->p_buffer[1],
384 /* Remove trailing 0 bytes */
385 while( p_pic->i_buffer && (!p_pic->p_buffer[p_pic->i_buffer-1] ) )
390 if( !( p_pic = ParseNALBlock( p_dec, p_pic ) ) )
392 p_sys->i_state = STATE_NOSYNC;
396 msg_Dbg( p_dec, "pts="I64Fd" dts="I64Fd,
397 p_pic->i_pts, p_pic->i_dts );
400 /* So p_block doesn't get re-added several times */
401 *pp_block = block_BytestreamPop( &p_sys->bytestream );
403 p_sys->i_state = STATE_NOSYNC;
410 /****************************************************************************
411 * PacketizeAVC1: Takes VCL blocks of data and creates annexe B type NAL stream
412 * Will always use 4 byte 0 0 0 1 startcodes
413 * Will prepend a SPS and PPS before each keyframe
414 ****************************************************************************/
415 static block_t *PacketizeAVC1( decoder_t *p_dec, block_t **pp_block )
417 decoder_sys_t *p_sys = p_dec->p_sys;
419 block_t *p_ret = NULL;
422 if( !pp_block || !*pp_block )
424 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
426 block_Release( *pp_block );
433 for( p = p_block->p_buffer; p < &p_block->p_buffer[p_block->i_buffer]; )
439 for( i = 0; i < p_sys->i_avcC_length_size; i++ )
441 i_size = (i_size << 8) | (*p++);
446 block_t *p_part = nal_get_annexeb( p_dec, p, i_size );
448 p_part->i_dts = p_block->i_dts;
449 p_part->i_pts = p_block->i_pts;
452 if( ( p_pic = ParseNALBlock( p_dec, p_part ) ) )
454 block_ChainAppend( &p_ret, p_pic );
459 block_Release( p_block );
464 static block_t *nal_get_annexeb( decoder_t *p_dec, uint8_t *p, int i_size )
468 p_nal = block_New( p_dec, 4 + i_size );
471 p_nal->p_buffer[0] = 0x00;
472 p_nal->p_buffer[1] = 0x00;
473 p_nal->p_buffer[2] = 0x00;
474 p_nal->p_buffer[3] = 0x01;
477 memcpy( &p_nal->p_buffer[4], p, i_size );
482 static void nal_get_decoded( uint8_t **pp_ret, int *pi_ret,
483 uint8_t *src, int i_src )
485 uint8_t *end = &src[i_src];
486 uint8_t *dst = malloc( i_src );
494 if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
506 *pi_ret = dst - *pp_ret;
509 static inline int bs_read_ue( bs_t *s )
513 while( bs_read1( s ) == 0 && s->p < s->p_end && i < 32 )
517 return( ( 1 << i) - 1 + bs_read( s, i ) );
520 static inline int bs_read_se( bs_t *s )
522 int val = bs_read_ue( s );
524 return val&0x01 ? (val+1)/2 : -(val/2);
527 /*****************************************************************************
528 * ParseNALBlock: parses annexB type NALs
529 * All p_frag blocks are required to start with 0 0 0 1 4-byte startcode
530 *****************************************************************************/
531 static block_t *ParseNALBlock( decoder_t *p_dec, block_t *p_frag )
533 decoder_sys_t *p_sys = p_dec->p_sys;
534 block_t *p_pic = NULL;
536 const int i_nal_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
537 const int i_nal_type = p_frag->p_buffer[4]&0x1f;
541 if( !p_sys->b_header && p_sys->slice.i_frame_type != BLOCK_FLAG_TYPE_I) \
544 if( p_sys->slice.i_frame_type == BLOCK_FLAG_TYPE_I && p_sys->p_sps && p_sys->p_pps ) \
546 block_t *p_sps = block_Duplicate( p_sys->p_sps ); \
547 block_t *p_pps = block_Duplicate( p_sys->p_pps ); \
548 p_sps->i_dts = p_sys->p_frame->i_dts; \
549 p_sps->i_pts = p_sys->p_frame->i_pts; \
550 block_ChainAppend( &p_sps, p_pps ); \
551 block_ChainAppend( &p_sps, p_sys->p_frame ); \
552 p_sys->b_header = VLC_TRUE; \
553 p_pic = block_ChainGather( p_sps ); \
555 p_pic = block_ChainGather( p_sys->p_frame ); \
557 p_pic->i_length = 0; /* FIXME */ \
558 p_pic->i_flags |= p_sys->slice.i_frame_type; \
560 p_sys->slice.i_frame_type = 0; \
561 p_sys->p_frame = NULL; \
562 p_sys->b_slice = VLC_FALSE; \
565 if( p_sys->b_slice && ( !p_sys->b_sps || !p_sys->b_pps ) )
567 block_ChainRelease( p_sys->p_frame );
568 msg_Warn( p_dec, "waiting for SPS/PPS" );
571 p_sys->slice.i_frame_type = 0;
572 p_sys->p_frame = NULL;
573 p_sys->b_slice = VLC_FALSE;
576 if( ( !p_sys->b_sps || !p_sys->b_pps ) &&
577 i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
579 p_sys->b_slice = VLC_TRUE;
580 /* Fragment will be discarded later on */
582 else if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
585 int i_dec = 0, i_first_mb, i_slice_type;
590 /* do not convert the whole frame */
591 nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[5],
592 __MIN( p_frag->i_buffer - 5, 60 ) );
593 bs_init( &s, dec, i_dec );
595 /* first_mb_in_slice */
596 i_first_mb = bs_read_ue( &s );
599 switch( (i_slice_type = bs_read_ue( &s )) )
602 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
605 slice.i_frame_type = BLOCK_FLAG_TYPE_B;
608 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
610 case 3: case 8: /* SP */
611 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
614 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
617 slice.i_frame_type = 0;
622 slice.i_nal_type = i_nal_type;
623 slice.i_nal_ref_idc = i_nal_ref_idc;
625 slice.i_pic_parameter_set_id = bs_read_ue( &s );
626 slice.i_frame_num = bs_read( &s, p_sys->i_log2_max_frame_num + 4 );
628 slice.i_field_pic_flag = 0;
629 slice.i_bottom_field_flag = -1;
630 if( !p_sys->b_frame_mbs_only )
633 slice.i_field_pic_flag = bs_read( &s, 1 );
634 if( slice.i_field_pic_flag )
635 slice.i_bottom_field_flag = bs_read( &s, 1 );
638 slice.i_idr_pic_id = p_sys->slice.i_idr_pic_id;
639 if( slice.i_nal_type == NAL_SLICE_IDR )
640 slice.i_idr_pic_id = bs_read_ue( &s );
642 slice.i_pic_order_cnt_lsb = -1;
643 slice.i_delta_pic_order_cnt_bottom = -1;
644 slice.i_delta_pic_order_cnt0 = 0;
645 slice.i_delta_pic_order_cnt1 = 0;
646 if( p_sys->i_pic_order_cnt_type == 0 )
648 slice.i_pic_order_cnt_lsb = bs_read( &s, p_sys->i_log2_max_pic_order_cnt_lsb + 4 );
649 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
650 slice.i_delta_pic_order_cnt_bottom = bs_read_se( &s );
652 else if( (p_sys->i_pic_order_cnt_type == 1) &&
653 (!p_sys->i_delta_pic_order_always_zero_flag) )
655 slice.i_delta_pic_order_cnt0 = bs_read_se( &s );
656 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
657 slice.i_delta_pic_order_cnt1 = bs_read_se( &s );
660 /* Detection of the first VCL NAL unit of a primary coded picture
663 if( slice.i_frame_num != p_sys->slice.i_frame_num ||
664 slice.i_pic_parameter_set_id != p_sys->slice.i_pic_parameter_set_id ||
665 slice.i_field_pic_flag != p_sys->slice.i_field_pic_flag ||
666 slice.i_nal_ref_idc != p_sys->slice.i_nal_ref_idc )
668 if( (slice.i_bottom_field_flag != -1) &&
669 (p_sys->slice.i_bottom_field_flag != -1) &&
670 (slice.i_bottom_field_flag != p_sys->slice.i_bottom_field_flag) )
672 if( p_sys->i_pic_order_cnt_type == 0 &&
673 ( slice.i_pic_order_cnt_lsb != p_sys->slice.i_pic_order_cnt_lsb ||
674 slice.i_delta_pic_order_cnt_bottom != p_sys->slice.i_delta_pic_order_cnt_bottom ) )
676 else if( p_sys->i_pic_order_cnt_type == 1 &&
677 ( slice.i_delta_pic_order_cnt0 != p_sys->slice.i_delta_pic_order_cnt0 ||
678 slice.i_delta_pic_order_cnt1 != p_sys->slice.i_delta_pic_order_cnt1 ) )
680 if( ( slice.i_nal_type == NAL_SLICE_IDR || p_sys->slice.i_nal_type == NAL_SLICE_IDR ) &&
681 ( slice.i_nal_type != p_sys->slice.i_nal_type || slice.i_idr_pic_id != p_sys->slice.i_idr_pic_id ) )
685 p_sys->slice = slice;
687 if( b_pic && p_sys->b_slice )
690 p_sys->b_slice = VLC_TRUE;
694 else if( i_nal_type == NAL_SPS )
701 if( !p_sys->b_sps ) msg_Dbg( p_dec, "found NAL_SPS" );
703 p_sys->b_sps = VLC_TRUE;
705 nal_get_decoded( &dec, &i_dec, &p_frag->p_buffer[5],
706 p_frag->i_buffer - 5 );
708 bs_init( &s, dec, i_dec );
709 /* Skip profile(8), constraint_set012, reserver(5), level(8) */
710 bs_skip( &s, 8 + 1+1+1 + 5 + 8 );
713 /* Skip i_log2_max_frame_num */
714 p_sys->i_log2_max_frame_num = bs_read_ue( &s );
715 if( p_sys->i_log2_max_frame_num > 12)
716 p_sys->i_log2_max_frame_num = 12;
718 p_sys->i_pic_order_cnt_type = bs_read_ue( &s );
719 if( p_sys->i_pic_order_cnt_type == 0 )
721 /* skip i_log2_max_poc_lsb */
722 p_sys->i_log2_max_pic_order_cnt_lsb = bs_read_ue( &s );
723 if( p_sys->i_log2_max_pic_order_cnt_lsb > 12 )
724 p_sys->i_log2_max_pic_order_cnt_lsb = 12;
726 else if( p_sys->i_pic_order_cnt_type == 1 )
729 /* skip b_delta_pic_order_always_zero */
730 p_sys->i_delta_pic_order_always_zero_flag = bs_read( &s, 1 );
731 /* skip i_offset_for_non_ref_pic */
733 /* skip i_offset_for_top_to_bottom_field */
735 /* read i_num_ref_frames_in_poc_cycle */
736 i_cycle = bs_read_ue( &s );
737 if( i_cycle > 256 ) i_cycle = 256;
740 /* skip i_offset_for_ref_frame */
744 /* i_num_ref_frames */
746 /* b_gaps_in_frame_num_value_allowed */
750 p_dec->fmt_out.video.i_width = 16 * ( bs_read_ue( &s ) + 1 );
751 p_dec->fmt_out.video.i_height = 16 * ( bs_read_ue( &s ) + 1 );
753 /* b_frame_mbs_only */
754 p_sys->b_frame_mbs_only = bs_read( &s, 1 );
755 if( p_sys->b_frame_mbs_only == 0 )
759 /* b_direct8x8_inference */
763 i_tmp = bs_read( &s, 1 );
777 i_tmp = bs_read( &s, 1 );
780 /* read the aspect ratio part if any FIXME check it */
781 i_tmp = bs_read( &s, 1 );
784 static const struct { int w, h; } sar[14] =
786 { 0, 0 }, { 1, 1 }, { 12, 11 }, { 10, 11 },
787 { 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 },
788 { 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 },
789 { 64, 33 }, { 160,99 },
791 int i_sar = bs_read( &s, 8 );
801 w = bs_read( &s, 16 );
802 h = bs_read( &s, 16 );
805 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR * w /
806 h * p_dec->fmt_out.video.i_width /
807 p_dec->fmt_out.video.i_height;
809 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR;
815 if( p_sys->b_slice ) OUTPUT;
817 /* We have a new SPS */
818 if( p_sys->p_sps ) block_Release( p_sys->p_sps );
819 p_sys->p_sps = p_frag;
821 /* Do not append the SPS because we will insert it on keyframes */
824 else if( i_nal_type == NAL_PPS )
828 bs_init( &s, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
829 bs_read_ue( &s ); // pps id
830 bs_read_ue( &s ); // sps id
831 bs_skip( &s, 1 ); // entropy coding mode flag
832 p_sys->i_pic_order_present_flag = bs_read( &s, 1 );
834 if( !p_sys->b_pps ) msg_Dbg( p_dec, "found NAL_PPS" );
835 p_sys->b_pps = VLC_TRUE;
839 if( p_sys->b_slice ) OUTPUT;
841 /* We have a new PPS */
842 if( p_sys->p_pps ) block_Release( p_sys->p_pps );
843 p_sys->p_pps = p_frag;
845 /* Do not append the PPS because we will insert it on keyframes */
848 else if( i_nal_type == NAL_AU_DELIMITER ||
849 i_nal_type == NAL_SEI ||
850 ( i_nal_type >= 13 && i_nal_type <= 18 ) )
852 if( p_sys->b_slice ) OUTPUT;
857 /* Append the block */
858 block_ChainAppend( &p_sys->p_frame, p_frag );