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 *****************************************************************************/
35 #include <vlc_common.h>
36 #include <vlc_plugin.h>
38 #include <vlc_codec.h>
39 #include <vlc_block.h>
41 #include "vlc_block_helper.h"
43 #include "../codec/cc.h"
44 #include "packetizer_helper.h"
46 /*****************************************************************************
48 *****************************************************************************/
49 static int Open ( vlc_object_t * );
50 static void Close( vlc_object_t * );
53 set_category( CAT_SOUT )
54 set_subcategory( SUBCAT_SOUT_PACKETIZER )
55 set_description( N_("H.264 video packetizer") )
56 set_capability( "packetizer", 50 )
57 set_callbacks( Open, Close )
61 /****************************************************************************
63 ****************************************************************************/
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;
90 packetizer_t packetizer;
99 block_t *pp_sps[SPS_MAX];
100 block_t *pp_pps[PPS_MAX];
103 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 */
138 NAL_SLICE_IDR = 5, /* ref_idc != 0 */
139 NAL_SEI = 6, /* ref_idc == 0 */
143 /* ref_idc == 0 for 6,9,10,11,12 */
148 NAL_PRIORITY_DISPOSABLE = 0,
149 NAL_PRIORITY_LOW = 1,
150 NAL_PRIORITY_HIGH = 2,
151 NAL_PRIORITY_HIGHEST = 3,
154 static block_t *Packetize( decoder_t *, block_t ** );
155 static block_t *PacketizeAVC1( decoder_t *, block_t ** );
156 static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] );
158 static void PacketizeReset( void *p_private, bool b_broken );
159 static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t * );
160 static int PacketizeValidate( void *p_private, block_t * );
162 static block_t *ParseNALBlock( decoder_t *, bool *pb_used_ts, block_t * );
163 static block_t *CreateAnnexbNAL( decoder_t *, const uint8_t *p, int );
165 static block_t *OutputPicture( decoder_t *p_dec );
166 static void PutSPS( decoder_t *p_dec, block_t *p_frag );
167 static void PutPPS( decoder_t *p_dec, block_t *p_frag );
168 static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
169 int i_nal_ref_idc, int i_nal_type, const block_t *p_frag );
170 static void ParseSei( decoder_t *, block_t * );
173 static const uint8_t p_h264_startcode[3] = { 0x00, 0x00, 0x01 };
175 /*****************************************************************************
176 * Open: probe the packetizer and return score
177 * When opening after demux, the packetizer is only loaded AFTER the decoder
178 * That means that what you set in fmt_out is ignored by the decoder in this special case
179 *****************************************************************************/
180 static int Open( vlc_object_t *p_this )
182 decoder_t *p_dec = (decoder_t*)p_this;
183 decoder_sys_t *p_sys;
186 if( p_dec->fmt_in.i_codec != VLC_CODEC_H264 )
188 if( p_dec->fmt_in.i_original_fourcc == VLC_FOURCC( 'a', 'v', 'c', '1') &&
189 p_dec->fmt_in.i_extra < 7 )
192 /* Allocate the memory needed to store the decoder's structure */
193 if( ( p_dec->p_sys = p_sys = malloc( sizeof(decoder_sys_t) ) ) == NULL )
198 packetizer_Init( &p_sys->packetizer,
199 p_h264_startcode, sizeof(p_h264_startcode),
201 PacketizeReset, PacketizeParse, PacketizeValidate, p_dec );
203 p_sys->b_slice = false;
204 p_sys->p_frame = NULL;
205 p_sys->b_header= false;
206 p_sys->b_sps = false;
207 p_sys->b_pps = false;
208 for( i = 0; i < SPS_MAX; i++ )
209 p_sys->pp_sps[i] = NULL;
210 for( i = 0; i < PPS_MAX; i++ )
211 p_sys->pp_pps[i] = NULL;
213 p_sys->slice.i_nal_type = -1;
214 p_sys->slice.i_nal_ref_idc = -1;
215 p_sys->slice.i_idr_pic_id = -1;
216 p_sys->slice.i_frame_num = -1;
217 p_sys->slice.i_frame_type = 0;
218 p_sys->slice.i_pic_parameter_set_id = -1;
219 p_sys->slice.i_field_pic_flag = 0;
220 p_sys->slice.i_bottom_field_flag = -1;
221 p_sys->slice.i_pic_order_cnt_lsb = -1;
222 p_sys->slice.i_delta_pic_order_cnt_bottom = -1;
224 p_sys->i_frame_dts = -1;
225 p_sys->i_frame_pts = -1;
227 /* Setup properties */
228 es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
229 p_dec->fmt_out.i_codec = VLC_CODEC_H264;
231 if( p_dec->fmt_in.i_original_fourcc == VLC_FOURCC( 'a', 'v', 'c', '1' ) )
233 /* This type of stream is produced by mp4 and matroska
234 * when we want to store it in another streamformat, you need to convert
235 * The fmt_in.p_extra should ALWAYS contain the avcC
236 * The fmt_out.p_extra should contain all the SPS and PPS with 4 byte startcodes */
237 uint8_t *p = &((uint8_t*)p_dec->fmt_in.p_extra)[4];
243 p_sys->i_avcC_length_size = 1 + ((*p++)&0x03);
247 for( i = 0; i < i_sps; i++ )
249 uint16_t i_length = GetWBE( p ); p += 2;
251 (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
255 block_t *p_sps = CreateAnnexbNAL( p_dec, p, i_length );
258 ParseNALBlock( p_dec, &b_dummy, p_sps );
263 for( i = 0; i < i_pps; i++ )
265 uint16_t i_length = GetWBE( p ); p += 2;
267 (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
271 block_t *p_pps = CreateAnnexbNAL( p_dec, p, i_length );
274 ParseNALBlock( p_dec, &b_dummy, p_pps );
277 msg_Dbg( p_dec, "avcC length size=%d, sps=%d, pps=%d",
278 p_sys->i_avcC_length_size, i_sps, i_pps );
280 if( !p_sys->b_sps || !p_sys->b_pps )
283 /* FIXME: FFMPEG isn't happy at all if you leave this */
284 if( p_dec->fmt_out.i_extra > 0 )
285 free( p_dec->fmt_out.p_extra );
286 p_dec->fmt_out.i_extra = 0;
287 p_dec->fmt_out.p_extra = NULL;
289 /* Set the new extradata */
290 for( i = 0; i < SPS_MAX; i++ )
292 if( p_sys->pp_sps[i] )
293 p_dec->fmt_out.i_extra += p_sys->pp_sps[i]->i_buffer;
295 for( i = 0; i < PPS_MAX; i++ )
297 if( p_sys->pp_pps[i] )
298 p_dec->fmt_out.i_extra += p_sys->pp_pps[i]->i_buffer;
300 p_dec->fmt_out.p_extra = malloc( p_dec->fmt_out.i_extra );
301 if( p_dec->fmt_out.p_extra )
303 uint8_t *p_dst = p_dec->fmt_out.p_extra;
305 for( i = 0; i < SPS_MAX; i++ )
307 if( p_sys->pp_sps[i] )
309 memcpy( p_dst, p_sys->pp_sps[i]->p_buffer, p_sys->pp_sps[i]->i_buffer );
310 p_dst += p_sys->pp_sps[i]->i_buffer;
313 for( i = 0; i < PPS_MAX; i++ )
315 if( p_sys->pp_pps[i] )
317 memcpy( p_dst, p_sys->pp_pps[i]->p_buffer, p_sys->pp_pps[i]->i_buffer );
318 p_dst += p_sys->pp_pps[i]->i_buffer;
321 p_sys->b_header = true;
325 p_dec->fmt_out.i_extra = 0;
329 p_dec->pf_packetize = PacketizeAVC1;
334 /* This type of stream contains data with 3 of 4 byte startcodes
335 * The fmt_in.p_extra MAY contain SPS/PPS with 4 byte startcodes
336 * The fmt_out.p_extra should be the same */
339 p_dec->pf_packetize = Packetize;
340 p_dec->pf_get_cc = GetCc;
345 p_sys->i_cc_flags = 0;
346 cc_Init( &p_sys->cc );
347 cc_Init( &p_sys->cc_next );
350 if( p_dec->fmt_in.i_extra > 0 )
351 packetizer_Header( &p_sys->packetizer,
352 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
358 /*****************************************************************************
359 * Close: clean up the packetizer
360 *****************************************************************************/
361 static void Close( vlc_object_t *p_this )
363 decoder_t *p_dec = (decoder_t*)p_this;
364 decoder_sys_t *p_sys = p_dec->p_sys;
368 block_ChainRelease( p_sys->p_frame );
369 for( i = 0; i < SPS_MAX; i++ )
371 if( p_sys->pp_sps[i] )
372 block_Release( p_sys->pp_sps[i] );
374 for( i = 0; i < PPS_MAX; i++ )
376 if( p_sys->pp_pps[i] )
377 block_Release( p_sys->pp_pps[i] );
379 packetizer_Clean( &p_sys->packetizer );
381 if( p_dec->pf_get_cc )
383 cc_Exit( &p_sys->cc_next );
384 cc_Exit( &p_sys->cc );
390 /****************************************************************************
391 * Packetize: the whole thing
392 * Search for the startcodes 3 or more bytes
393 * Feed ParseNALBlock ALWAYS with 4 byte startcode prepended NALs
394 ****************************************************************************/
395 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
397 decoder_sys_t *p_sys = p_dec->p_sys;
399 return packetizer_Packetize( &p_sys->packetizer, pp_block );
402 /****************************************************************************
403 * PacketizeAVC1: Takes VCL blocks of data and creates annexe B type NAL stream
404 * Will always use 4 byte 0 0 0 1 startcodes
405 * Will prepend a SPS and PPS before each keyframe
406 ****************************************************************************/
407 static block_t *PacketizeAVC1( decoder_t *p_dec, block_t **pp_block )
409 decoder_sys_t *p_sys = p_dec->p_sys;
411 block_t *p_ret = NULL;
414 if( !pp_block || !*pp_block )
416 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
418 block_Release( *pp_block );
425 for( p = p_block->p_buffer; p < &p_block->p_buffer[p_block->i_buffer]; )
432 for( i = 0; i < p_sys->i_avcC_length_size; i++ )
434 i_size = (i_size << 8) | (*p++);
438 i_size > ( p_block->p_buffer + p_block->i_buffer - p ) )
440 msg_Err( p_dec, "Broken frame : size %d is too big", i_size );
444 block_t *p_part = CreateAnnexbNAL( 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, &b_dummy, p_part ) ) )
454 block_ChainAppend( &p_ret, p_pic );
458 block_Release( p_block );
463 /*****************************************************************************
465 *****************************************************************************/
466 static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] )
468 decoder_sys_t *p_sys = p_dec->p_sys;
471 for( int i = 0; i < 4; i++ )
472 pb_present[i] = p_sys->cc.pb_present[i];
474 if( p_sys->cc.i_data <= 0 )
477 p_cc = block_New( p_dec, p_sys->cc.i_data);
480 memcpy( p_cc->p_buffer, p_sys->cc.p_data, p_sys->cc.i_data );
482 p_cc->i_pts = p_sys->cc.b_reorder ? p_sys->i_cc_pts : p_sys->i_cc_dts;
483 p_cc->i_flags = ( p_sys->cc.b_reorder ? p_sys->i_cc_flags : BLOCK_FLAG_TYPE_P ) & BLOCK_FLAG_TYPE_MASK;
485 cc_Flush( &p_sys->cc );
489 /****************************************************************************
491 ****************************************************************************/
492 static void PacketizeReset( void *p_private, bool b_broken )
494 decoder_t *p_dec = p_private;
495 decoder_sys_t *p_sys = p_dec->p_sys;
500 block_ChainRelease( p_sys->p_frame );
501 p_sys->p_frame = NULL;
502 p_sys->slice.i_frame_type = 0;
503 p_sys->b_slice = false;
505 p_sys->i_frame_pts = -1;
506 p_sys->i_frame_dts = -1;
508 static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t *p_block )
510 decoder_t *p_dec = p_private;
512 /* Remove trailing 0 bytes */
513 while( p_block->i_buffer && p_block->p_buffer[p_block->i_buffer-1] == 0x00 )
516 return ParseNALBlock( p_dec, pb_ts_used, p_block );
518 static int PacketizeValidate( void *p_private, block_t *p_au )
520 VLC_UNUSED(p_private);
525 static block_t *CreateAnnexbNAL( decoder_t *p_dec, const uint8_t *p, int i_size )
529 p_nal = block_New( p_dec, 4 + i_size );
530 if( !p_nal ) return NULL;
533 p_nal->p_buffer[0] = 0x00;
534 p_nal->p_buffer[1] = 0x00;
535 p_nal->p_buffer[2] = 0x00;
536 p_nal->p_buffer[3] = 0x01;
539 memcpy( &p_nal->p_buffer[4], p, i_size );
545 static void CreateDecodedNAL( uint8_t **pp_ret, int *pi_ret,
546 const uint8_t *src, int i_src )
548 const uint8_t *end = &src[i_src];
549 uint8_t *dst = malloc( i_src );
557 if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
569 *pi_ret = dst - *pp_ret;
572 static inline int bs_read_ue( bs_t *s )
576 while( bs_read1( s ) == 0 && s->p < s->p_end && i < 32 )
580 return( ( 1 << i) - 1 + bs_read( s, i ) );
583 static inline int bs_read_se( bs_t *s )
585 int val = bs_read_ue( s );
587 return val&0x01 ? (val+1)/2 : -(val/2);
590 /*****************************************************************************
591 * ParseNALBlock: parses annexB type NALs
592 * All p_frag blocks are required to start with 0 0 0 1 4-byte startcode
593 *****************************************************************************/
594 static block_t *ParseNALBlock( decoder_t *p_dec, bool *pb_used_ts, block_t *p_frag )
596 decoder_sys_t *p_sys = p_dec->p_sys;
597 block_t *p_pic = NULL;
599 const int i_nal_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
600 const int i_nal_type = p_frag->p_buffer[4]&0x1f;
601 const mtime_t i_frag_dts = p_frag->i_dts;
602 const mtime_t i_frag_pts = p_frag->i_pts;
604 if( p_sys->b_slice && ( !p_sys->b_sps || !p_sys->b_pps ) )
606 block_ChainRelease( p_sys->p_frame );
607 msg_Warn( p_dec, "waiting for SPS/PPS" );
610 p_sys->slice.i_frame_type = 0;
611 p_sys->p_frame = NULL;
612 p_sys->b_slice = false;
613 cc_Flush( &p_sys->cc_next );
616 if( ( !p_sys->b_sps || !p_sys->b_pps ) &&
617 i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
619 p_sys->b_slice = true;
620 /* Fragment will be discarded later on */
622 else if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
627 ParseSlice( p_dec, &b_new_picture, &slice, i_nal_ref_idc, i_nal_type, p_frag );
630 if( b_new_picture && p_sys->b_slice )
631 p_pic = OutputPicture( p_dec );
634 p_sys->slice = slice;
635 p_sys->b_slice = true;
637 else if( i_nal_type == NAL_SPS )
640 p_pic = OutputPicture( p_dec );
642 PutSPS( p_dec, p_frag );
644 /* Do not append the SPS because we will insert it on keyframes */
647 else if( i_nal_type == NAL_PPS )
650 p_pic = OutputPicture( p_dec );
652 PutPPS( p_dec, p_frag );
654 /* Do not append the PPS because we will insert it on keyframes */
657 else if( i_nal_type == NAL_AU_DELIMITER ||
658 i_nal_type == NAL_SEI ||
659 ( i_nal_type >= 13 && i_nal_type <= 18 ) )
662 p_pic = OutputPicture( p_dec );
664 /* Parse SEI for CC support */
665 if( i_nal_type == NAL_SEI )
666 ParseSei( p_dec, p_frag );
669 /* Append the block */
671 block_ChainAppend( &p_sys->p_frame, p_frag );
674 if( p_sys->i_frame_dts < 0 && p_sys->i_frame_pts < 0 )
676 p_sys->i_frame_dts = i_frag_dts;
677 p_sys->i_frame_pts = i_frag_pts;
683 static block_t *OutputPicture( decoder_t *p_dec )
685 decoder_sys_t *p_sys = p_dec->p_sys;
688 if( !p_sys->b_header && p_sys->slice.i_frame_type != BLOCK_FLAG_TYPE_I)
691 if( p_sys->slice.i_frame_type == BLOCK_FLAG_TYPE_I && p_sys->b_sps && p_sys->b_pps )
693 block_t *p_list = NULL;
696 for( i = 0; i < SPS_MAX; i++ )
698 if( p_sys->pp_sps[i] )
699 block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_sps[i] ) );
701 for( i = 0; i < PPS_MAX; i++ )
703 if( p_sys->pp_pps[i] )
704 block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_pps[i] ) );
707 p_sys->b_header = true;
709 block_ChainAppend( &p_list, p_sys->p_frame );
710 p_pic = block_ChainGather( p_list );
714 p_pic = block_ChainGather( p_sys->p_frame );
716 p_pic->i_dts = p_sys->i_frame_dts;
717 p_pic->i_pts = p_sys->i_frame_pts;
718 p_pic->i_length = 0; /* FIXME */
719 p_pic->i_flags |= p_sys->slice.i_frame_type;
721 p_sys->slice.i_frame_type = 0;
722 p_sys->p_frame = NULL;
723 p_sys->i_frame_dts = -1;
724 p_sys->i_frame_pts = -1;
725 p_sys->b_slice = false;
728 p_sys->i_cc_pts = p_pic->i_pts;
729 p_sys->i_cc_dts = p_pic->i_dts;
730 p_sys->i_cc_flags = p_pic->i_flags;
733 cc_data_t cc_tmp = p_sys->cc;
734 p_sys->cc = p_sys->cc_next;
735 p_sys->cc_next = cc_tmp;
737 cc_Flush( &p_sys->cc_next );
742 static void PutSPS( decoder_t *p_dec, block_t *p_frag )
744 decoder_sys_t *p_sys = p_dec->p_sys;
746 uint8_t *pb_dec = NULL;
752 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
753 p_frag->i_buffer - 5 );
755 bs_init( &s, pb_dec, i_dec );
756 int i_profile_idc = bs_read( &s, 8 );
757 /* Skip constraint_set0123, reserved(4), level(8) */
758 bs_skip( &s, 1+1+1+1 + 4 + 8 );
760 i_sps_id = bs_read_ue( &s );
761 if( i_sps_id >= SPS_MAX )
763 msg_Warn( p_dec, "invalid SPS (sps_id=%d)", i_sps_id );
765 block_Release( p_frag );
769 if( i_profile_idc == 100 || i_profile_idc == 110 ||
770 i_profile_idc == 122 || i_profile_idc == 244 ||
771 i_profile_idc == 44 || i_profile_idc == 83 ||
772 i_profile_idc == 86 )
774 /* chroma_format_idc */
775 const int i_chroma_format_idc = bs_read_ue( &s );
776 if( i_chroma_format_idc == 3 )
777 bs_skip( &s, 1 ); /* seperate_colour_plane_flag */
778 /* bit_depth_luma_minus8 */
780 /* bit_depth_chroma_minus8 */
782 /* qpprime_y_zero_transform_bypass_flag */
784 /* seq_scaling_matrix_present_flag */
785 i_tmp = bs_read( &s, 1 );
788 for( int i = 0; i < ((3 != i_chroma_format_idc) ? 8 : 12); i++ )
790 /* seq_scaling_list_present_flag[i] */
791 i_tmp = bs_read( &s, 1 );
794 const int i_size_of_scaling_list = (i < 6 ) ? 16 : 64;
795 /* scaling_list (...) */
798 for( int j = 0; j < i_size_of_scaling_list; j++ )
800 if( i_nextscale != 0 )
803 i_tmp = bs_read( &s, 1 );
804 i_nextscale = ( i_lastscale + i_tmp + 256 ) % 256;
805 /* useDefaultScalingMatrixFlag = ... */
808 i_lastscale = ( i_nextscale == 0 ) ? i_lastscale : i_nextscale;
814 /* Skip i_log2_max_frame_num */
815 p_sys->i_log2_max_frame_num = bs_read_ue( &s );
816 if( p_sys->i_log2_max_frame_num > 12)
817 p_sys->i_log2_max_frame_num = 12;
819 p_sys->i_pic_order_cnt_type = bs_read_ue( &s );
820 if( p_sys->i_pic_order_cnt_type == 0 )
822 /* skip i_log2_max_poc_lsb */
823 p_sys->i_log2_max_pic_order_cnt_lsb = bs_read_ue( &s );
824 if( p_sys->i_log2_max_pic_order_cnt_lsb > 12 )
825 p_sys->i_log2_max_pic_order_cnt_lsb = 12;
827 else if( p_sys->i_pic_order_cnt_type == 1 )
830 /* skip b_delta_pic_order_always_zero */
831 p_sys->i_delta_pic_order_always_zero_flag = bs_read( &s, 1 );
832 /* skip i_offset_for_non_ref_pic */
834 /* skip i_offset_for_top_to_bottom_field */
836 /* read i_num_ref_frames_in_poc_cycle */
837 i_cycle = bs_read_ue( &s );
838 if( i_cycle > 256 ) i_cycle = 256;
841 /* skip i_offset_for_ref_frame */
846 /* i_num_ref_frames */
848 /* b_gaps_in_frame_num_value_allowed */
852 p_dec->fmt_out.video.i_width = 16 * ( bs_read_ue( &s ) + 1 );
853 p_dec->fmt_out.video.i_height = 16 * ( bs_read_ue( &s ) + 1 );
855 /* b_frame_mbs_only */
856 p_sys->b_frame_mbs_only = bs_read( &s, 1 );
857 if( p_sys->b_frame_mbs_only == 0 )
861 /* b_direct8x8_inference */
865 i_tmp = bs_read( &s, 1 );
879 i_tmp = bs_read( &s, 1 );
882 /* read the aspect ratio part if any */
883 i_tmp = bs_read( &s, 1 );
886 static const struct { int w, h; } sar[17] =
888 { 0, 0 }, { 1, 1 }, { 12, 11 }, { 10, 11 },
889 { 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 },
890 { 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 },
891 { 64, 33 }, { 160,99 }, { 4, 3 }, { 3, 2 },
894 int i_sar = bs_read( &s, 8 );
902 else if( i_sar == 255 )
904 w = bs_read( &s, 16 );
905 h = bs_read( &s, 16 );
914 p_dec->fmt_out.video.i_aspect = (int64_t)VOUT_ASPECT_FACTOR *
915 ( w * p_dec->fmt_out.video.i_width ) /
916 ( h * p_dec->fmt_out.video.i_height);
918 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR;
924 /* We have a new SPS */
926 msg_Dbg( p_dec, "found NAL_SPS (sps_id=%d)", i_sps_id );
929 if( p_sys->pp_sps[i_sps_id] )
930 block_Release( p_sys->pp_sps[i_sps_id] );
931 p_sys->pp_sps[i_sps_id] = p_frag;
934 static void PutPPS( decoder_t *p_dec, block_t *p_frag )
936 decoder_sys_t *p_sys = p_dec->p_sys;
941 bs_init( &s, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
942 i_pps_id = bs_read_ue( &s ); // pps id
943 i_sps_id = bs_read_ue( &s ); // sps id
944 if( i_pps_id >= PPS_MAX || i_sps_id >= SPS_MAX )
946 msg_Warn( p_dec, "invalid PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
947 block_Release( p_frag );
950 bs_skip( &s, 1 ); // entropy coding mode flag
951 p_sys->i_pic_order_present_flag = bs_read( &s, 1 );
954 /* We have a new PPS */
956 msg_Dbg( p_dec, "found NAL_PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
959 if( p_sys->pp_pps[i_pps_id] )
960 block_Release( p_sys->pp_pps[i_pps_id] );
961 p_sys->pp_pps[i_pps_id] = p_frag;
964 static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
965 int i_nal_ref_idc, int i_nal_type, const block_t *p_frag )
967 decoder_sys_t *p_sys = p_dec->p_sys;
970 int i_first_mb, i_slice_type;
974 /* do not convert the whole frame */
975 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
976 __MIN( p_frag->i_buffer - 5, 60 ) );
977 bs_init( &s, pb_dec, i_dec );
979 /* first_mb_in_slice */
980 i_first_mb = bs_read_ue( &s );
983 switch( (i_slice_type = bs_read_ue( &s )) )
986 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
989 slice.i_frame_type = BLOCK_FLAG_TYPE_B;
992 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
994 case 3: case 8: /* SP */
995 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
998 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
1001 slice.i_frame_type = 0;
1006 slice.i_nal_type = i_nal_type;
1007 slice.i_nal_ref_idc = i_nal_ref_idc;
1009 slice.i_pic_parameter_set_id = bs_read_ue( &s );
1010 slice.i_frame_num = bs_read( &s, p_sys->i_log2_max_frame_num + 4 );
1012 slice.i_field_pic_flag = 0;
1013 slice.i_bottom_field_flag = -1;
1014 if( !p_sys->b_frame_mbs_only )
1016 /* field_pic_flag */
1017 slice.i_field_pic_flag = bs_read( &s, 1 );
1018 if( slice.i_field_pic_flag )
1019 slice.i_bottom_field_flag = bs_read( &s, 1 );
1022 slice.i_idr_pic_id = p_sys->slice.i_idr_pic_id;
1023 if( slice.i_nal_type == NAL_SLICE_IDR )
1024 slice.i_idr_pic_id = bs_read_ue( &s );
1026 slice.i_pic_order_cnt_lsb = -1;
1027 slice.i_delta_pic_order_cnt_bottom = -1;
1028 slice.i_delta_pic_order_cnt0 = 0;
1029 slice.i_delta_pic_order_cnt1 = 0;
1030 if( p_sys->i_pic_order_cnt_type == 0 )
1032 slice.i_pic_order_cnt_lsb = bs_read( &s, p_sys->i_log2_max_pic_order_cnt_lsb + 4 );
1033 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
1034 slice.i_delta_pic_order_cnt_bottom = bs_read_se( &s );
1036 else if( (p_sys->i_pic_order_cnt_type == 1) &&
1037 (!p_sys->i_delta_pic_order_always_zero_flag) )
1039 slice.i_delta_pic_order_cnt0 = bs_read_se( &s );
1040 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
1041 slice.i_delta_pic_order_cnt1 = bs_read_se( &s );
1045 /* Detection of the first VCL NAL unit of a primary coded picture
1046 * (cf. 7.4.1.2.4) */
1048 if( slice.i_frame_num != p_sys->slice.i_frame_num ||
1049 slice.i_pic_parameter_set_id != p_sys->slice.i_pic_parameter_set_id ||
1050 slice.i_field_pic_flag != p_sys->slice.i_field_pic_flag ||
1051 slice.i_nal_ref_idc != p_sys->slice.i_nal_ref_idc )
1053 if( (slice.i_bottom_field_flag != -1) &&
1054 (p_sys->slice.i_bottom_field_flag != -1) &&
1055 (slice.i_bottom_field_flag != p_sys->slice.i_bottom_field_flag) )
1057 if( p_sys->i_pic_order_cnt_type == 0 &&
1058 ( slice.i_pic_order_cnt_lsb != p_sys->slice.i_pic_order_cnt_lsb ||
1059 slice.i_delta_pic_order_cnt_bottom != p_sys->slice.i_delta_pic_order_cnt_bottom ) )
1061 else if( p_sys->i_pic_order_cnt_type == 1 &&
1062 ( slice.i_delta_pic_order_cnt0 != p_sys->slice.i_delta_pic_order_cnt0 ||
1063 slice.i_delta_pic_order_cnt1 != p_sys->slice.i_delta_pic_order_cnt1 ) )
1065 if( ( slice.i_nal_type == NAL_SLICE_IDR || p_sys->slice.i_nal_type == NAL_SLICE_IDR ) &&
1066 ( slice.i_nal_type != p_sys->slice.i_nal_type || slice.i_idr_pic_id != p_sys->slice.i_idr_pic_id ) )
1070 *pb_new_picture = b_pic;
1074 static void ParseSei( decoder_t *p_dec, block_t *p_frag )
1076 decoder_sys_t *p_sys = p_dec->p_sys;
1081 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
1085 /* The +1 is for rbsp trailing bits */
1086 for( int i_used = 0; i_used+1 < i_dec; )
1090 while( i_used+1 < i_dec )
1092 const int i_byte = pb_dec[i_used++];
1094 if( i_byte != 0xff )
1099 while( i_used+1 < i_dec )
1101 const int i_byte = pb_dec[i_used++];
1103 if( i_byte != 0xff )
1107 if( i_used + i_size + 1 > i_dec )
1110 /* Look for user_data_registered_itu_t_t35 */
1113 static const uint8_t p_dvb1_data_start_code[] = {
1116 0x47, 0x41, 0x39, 0x34
1118 const int i_t35 = i_size;
1119 const uint8_t *p_t35 = &pb_dec[i_used];
1121 /* Check for we have DVB1_data() */
1123 !memcmp( p_t35, p_dvb1_data_start_code, sizeof(p_dvb1_data_start_code) ) )
1125 cc_Extract( &p_sys->cc_next, &p_t35[3], i_t35 - 3 );