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 *****************************************************************************/
36 #include <vlc_common.h>
37 #include <vlc_plugin.h>
39 #include <vlc_codec.h>
40 #include <vlc_block.h>
42 #include <vlc_block_helper.h>
44 #include "../codec/cc.h"
45 #include "packetizer_helper.h"
47 /*****************************************************************************
49 *****************************************************************************/
50 static int Open ( vlc_object_t * );
51 static void Close( vlc_object_t * );
54 set_category( CAT_SOUT )
55 set_subcategory( SUBCAT_SOUT_PACKETIZER )
56 set_description( N_("H.264 video packetizer") )
57 set_capability( "packetizer", 50 )
58 set_callbacks( Open, Close )
62 /****************************************************************************
64 ****************************************************************************/
71 int i_pic_parameter_set_id;
75 int i_bottom_field_flag;
79 int i_pic_order_cnt_lsb;
80 int i_delta_pic_order_cnt_bottom;
82 int i_delta_pic_order_cnt0;
83 int i_delta_pic_order_cnt1;
91 packetizer_t packetizer;
102 block_t *pp_sps[SPS_MAX];
103 block_t *pp_pps[PPS_MAX];
104 int i_recovery_frames; /* -1 = no recovery */
107 int i_avcC_length_size;
109 /* Useful values of the Sequence Parameter Set */
110 int i_log2_max_frame_num;
111 int b_frame_mbs_only;
112 int i_pic_order_cnt_type;
113 int i_delta_pic_order_always_zero_flag;
114 int i_log2_max_pic_order_cnt_lsb;
116 /* Value from Picture Parameter Set */
117 int i_pic_order_present_flag;
119 /* Useful values of the Slice Header */
142 NAL_SLICE_IDR = 5, /* ref_idc != 0 */
143 NAL_SEI = 6, /* ref_idc == 0 */
147 /* ref_idc == 0 for 6,9,10,11,12 */
152 NAL_PRIORITY_DISPOSABLE = 0,
153 NAL_PRIORITY_LOW = 1,
154 NAL_PRIORITY_HIGH = 2,
155 NAL_PRIORITY_HIGHEST = 3,
158 #define BLOCK_FLAG_PRIVATE_AUD (1 << BLOCK_FLAG_PRIVATE_SHIFT)
160 static block_t *Packetize( decoder_t *, block_t ** );
161 static block_t *PacketizeAVC1( decoder_t *, block_t ** );
162 static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] );
164 static void PacketizeReset( void *p_private, bool b_broken );
165 static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t * );
166 static int PacketizeValidate( void *p_private, block_t * );
168 static block_t *ParseNALBlock( decoder_t *, bool *pb_used_ts, block_t * );
169 static block_t *CreateAnnexbNAL( decoder_t *, const uint8_t *p, int );
171 static block_t *OutputPicture( decoder_t *p_dec );
172 static void PutSPS( decoder_t *p_dec, block_t *p_frag );
173 static void PutPPS( decoder_t *p_dec, block_t *p_frag );
174 static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
175 int i_nal_ref_idc, int i_nal_type, const block_t *p_frag );
176 static void ParseSei( decoder_t *, block_t * );
179 static const uint8_t p_h264_startcode[3] = { 0x00, 0x00, 0x01 };
181 /*****************************************************************************
182 * Open: probe the packetizer and return score
183 * When opening after demux, the packetizer is only loaded AFTER the decoder
184 * That means that what you set in fmt_out is ignored by the decoder in this special case
185 *****************************************************************************/
186 static int Open( vlc_object_t *p_this )
188 decoder_t *p_dec = (decoder_t*)p_this;
189 decoder_sys_t *p_sys;
192 if( p_dec->fmt_in.i_codec != VLC_CODEC_H264 )
194 if( p_dec->fmt_in.i_original_fourcc == VLC_FOURCC( 'a', 'v', 'c', '1') &&
195 p_dec->fmt_in.i_extra < 7 )
198 /* Allocate the memory needed to store the decoder's structure */
199 if( ( p_dec->p_sys = p_sys = malloc( sizeof(decoder_sys_t) ) ) == NULL )
204 packetizer_Init( &p_sys->packetizer,
205 p_h264_startcode, sizeof(p_h264_startcode),
206 p_h264_startcode, 1, 5,
207 PacketizeReset, PacketizeParse, PacketizeValidate, p_dec );
209 p_sys->b_slice = false;
210 p_sys->p_frame = NULL;
211 p_sys->b_frame_sps = false;
212 p_sys->b_frame_pps = false;
214 p_sys->b_header= false;
215 p_sys->b_sps = false;
216 p_sys->b_pps = false;
217 for( i = 0; i < SPS_MAX; i++ )
218 p_sys->pp_sps[i] = NULL;
219 for( i = 0; i < PPS_MAX; i++ )
220 p_sys->pp_pps[i] = NULL;
221 p_sys->i_recovery_frames = -1;
223 p_sys->slice.i_nal_type = -1;
224 p_sys->slice.i_nal_ref_idc = -1;
225 p_sys->slice.i_idr_pic_id = -1;
226 p_sys->slice.i_frame_num = -1;
227 p_sys->slice.i_frame_type = 0;
228 p_sys->slice.i_pic_parameter_set_id = -1;
229 p_sys->slice.i_field_pic_flag = 0;
230 p_sys->slice.i_bottom_field_flag = -1;
231 p_sys->slice.i_pic_order_cnt_lsb = -1;
232 p_sys->slice.i_delta_pic_order_cnt_bottom = -1;
234 p_sys->i_frame_dts = VLC_TS_INVALID;
235 p_sys->i_frame_pts = VLC_TS_INVALID;
237 /* Setup properties */
238 es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
239 p_dec->fmt_out.i_codec = VLC_CODEC_H264;
241 if( p_dec->fmt_in.i_original_fourcc == VLC_FOURCC( 'a', 'v', 'c', '1' ) )
243 /* This type of stream is produced by mp4 and matroska
244 * when we want to store it in another streamformat, you need to convert
245 * The fmt_in.p_extra should ALWAYS contain the avcC
246 * The fmt_out.p_extra should contain all the SPS and PPS with 4 byte startcodes */
247 uint8_t *p = &((uint8_t*)p_dec->fmt_in.p_extra)[4];
253 p_sys->i_avcC_length_size = 1 + ((*p++)&0x03);
257 for( i = 0; i < i_sps; i++ )
259 uint16_t i_length = GetWBE( p ); p += 2;
261 (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
265 block_t *p_sps = CreateAnnexbNAL( p_dec, p, i_length );
268 ParseNALBlock( p_dec, &b_dummy, p_sps );
273 for( i = 0; i < i_pps; i++ )
275 uint16_t i_length = GetWBE( p ); p += 2;
277 (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
281 block_t *p_pps = CreateAnnexbNAL( p_dec, p, i_length );
284 ParseNALBlock( p_dec, &b_dummy, p_pps );
287 msg_Dbg( p_dec, "avcC length size=%d, sps=%d, pps=%d",
288 p_sys->i_avcC_length_size, i_sps, i_pps );
290 if( !p_sys->b_sps || !p_sys->b_pps )
293 /* FIXME: FFMPEG isn't happy at all if you leave this */
294 if( p_dec->fmt_out.i_extra > 0 )
295 free( p_dec->fmt_out.p_extra );
296 p_dec->fmt_out.i_extra = 0;
297 p_dec->fmt_out.p_extra = NULL;
299 /* Set the new extradata */
300 for( i = 0; i < SPS_MAX; i++ )
302 if( p_sys->pp_sps[i] )
303 p_dec->fmt_out.i_extra += p_sys->pp_sps[i]->i_buffer;
305 for( i = 0; i < PPS_MAX; i++ )
307 if( p_sys->pp_pps[i] )
308 p_dec->fmt_out.i_extra += p_sys->pp_pps[i]->i_buffer;
310 p_dec->fmt_out.p_extra = malloc( p_dec->fmt_out.i_extra );
311 if( p_dec->fmt_out.p_extra )
313 uint8_t *p_dst = p_dec->fmt_out.p_extra;
315 for( i = 0; i < SPS_MAX; i++ )
317 if( p_sys->pp_sps[i] )
319 memcpy( p_dst, p_sys->pp_sps[i]->p_buffer, p_sys->pp_sps[i]->i_buffer );
320 p_dst += p_sys->pp_sps[i]->i_buffer;
323 for( i = 0; i < PPS_MAX; i++ )
325 if( p_sys->pp_pps[i] )
327 memcpy( p_dst, p_sys->pp_pps[i]->p_buffer, p_sys->pp_pps[i]->i_buffer );
328 p_dst += p_sys->pp_pps[i]->i_buffer;
331 p_sys->b_header = true;
335 p_dec->fmt_out.i_extra = 0;
339 p_dec->pf_packetize = PacketizeAVC1;
344 /* This type of stream contains data with 3 of 4 byte startcodes
345 * The fmt_in.p_extra MAY contain SPS/PPS with 4 byte startcodes
346 * The fmt_out.p_extra should be the same */
349 p_dec->pf_packetize = Packetize;
350 p_dec->pf_get_cc = GetCc;
353 p_sys->i_cc_pts = VLC_TS_INVALID;
354 p_sys->i_cc_dts = VLC_TS_INVALID;
355 p_sys->i_cc_flags = 0;
356 cc_Init( &p_sys->cc );
357 cc_Init( &p_sys->cc_next );
360 if( p_dec->fmt_in.i_extra > 0 )
361 packetizer_Header( &p_sys->packetizer,
362 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
368 /*****************************************************************************
369 * Close: clean up the packetizer
370 *****************************************************************************/
371 static void Close( vlc_object_t *p_this )
373 decoder_t *p_dec = (decoder_t*)p_this;
374 decoder_sys_t *p_sys = p_dec->p_sys;
378 block_ChainRelease( p_sys->p_frame );
379 for( i = 0; i < SPS_MAX; i++ )
381 if( p_sys->pp_sps[i] )
382 block_Release( p_sys->pp_sps[i] );
384 for( i = 0; i < PPS_MAX; i++ )
386 if( p_sys->pp_pps[i] )
387 block_Release( p_sys->pp_pps[i] );
389 packetizer_Clean( &p_sys->packetizer );
391 if( p_dec->pf_get_cc )
393 cc_Exit( &p_sys->cc_next );
394 cc_Exit( &p_sys->cc );
400 /****************************************************************************
401 * Packetize: the whole thing
402 * Search for the startcodes 3 or more bytes
403 * Feed ParseNALBlock ALWAYS with 4 byte startcode prepended NALs
404 ****************************************************************************/
405 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
407 decoder_sys_t *p_sys = p_dec->p_sys;
409 return packetizer_Packetize( &p_sys->packetizer, pp_block );
412 /****************************************************************************
413 * PacketizeAVC1: Takes VCL blocks of data and creates annexe B type NAL stream
414 * Will always use 4 byte 0 0 0 1 startcodes
415 * Will prepend a SPS and PPS before each keyframe
416 ****************************************************************************/
417 static block_t *PacketizeAVC1( decoder_t *p_dec, block_t **pp_block )
419 decoder_sys_t *p_sys = p_dec->p_sys;
421 block_t *p_ret = NULL;
424 if( !pp_block || !*pp_block )
426 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
428 block_Release( *pp_block );
435 for( p = p_block->p_buffer; p < &p_block->p_buffer[p_block->i_buffer]; )
442 for( i = 0; i < p_sys->i_avcC_length_size; i++ )
444 i_size = (i_size << 8) | (*p++);
448 i_size > ( p_block->p_buffer + p_block->i_buffer - p ) )
450 msg_Err( p_dec, "Broken frame : size %d is too big", i_size );
454 block_t *p_part = CreateAnnexbNAL( p_dec, p, i_size );
458 p_part->i_dts = p_block->i_dts;
459 p_part->i_pts = p_block->i_pts;
462 if( ( p_pic = ParseNALBlock( p_dec, &b_dummy, p_part ) ) )
464 block_ChainAppend( &p_ret, p_pic );
468 block_Release( p_block );
473 /*****************************************************************************
475 *****************************************************************************/
476 static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] )
478 decoder_sys_t *p_sys = p_dec->p_sys;
481 for( int i = 0; i < 4; i++ )
482 pb_present[i] = p_sys->cc.pb_present[i];
484 if( p_sys->cc.i_data <= 0 )
487 p_cc = block_New( p_dec, p_sys->cc.i_data);
490 memcpy( p_cc->p_buffer, p_sys->cc.p_data, p_sys->cc.i_data );
492 p_cc->i_pts = p_sys->cc.b_reorder ? p_sys->i_cc_pts : p_sys->i_cc_dts;
493 p_cc->i_flags = ( p_sys->cc.b_reorder ? p_sys->i_cc_flags : BLOCK_FLAG_TYPE_P ) & BLOCK_FLAG_TYPE_MASK;
495 cc_Flush( &p_sys->cc );
499 /****************************************************************************
501 ****************************************************************************/
502 static void PacketizeReset( void *p_private, bool b_broken )
504 decoder_t *p_dec = p_private;
505 decoder_sys_t *p_sys = p_dec->p_sys;
510 block_ChainRelease( p_sys->p_frame );
511 p_sys->p_frame = NULL;
512 p_sys->b_frame_sps = false;
513 p_sys->b_frame_pps = false;
514 p_sys->slice.i_frame_type = 0;
515 p_sys->b_slice = false;
517 p_sys->i_frame_pts = VLC_TS_INVALID;
518 p_sys->i_frame_dts = VLC_TS_INVALID;
520 static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t *p_block )
522 decoder_t *p_dec = p_private;
524 /* Remove trailing 0 bytes */
525 while( p_block->i_buffer > 5 && p_block->p_buffer[p_block->i_buffer-1] == 0x00 )
528 return ParseNALBlock( p_dec, pb_ts_used, p_block );
530 static int PacketizeValidate( void *p_private, block_t *p_au )
532 VLC_UNUSED(p_private);
537 static block_t *CreateAnnexbNAL( decoder_t *p_dec, const uint8_t *p, int i_size )
541 p_nal = block_New( p_dec, 4 + i_size );
542 if( !p_nal ) return NULL;
545 p_nal->p_buffer[0] = 0x00;
546 p_nal->p_buffer[1] = 0x00;
547 p_nal->p_buffer[2] = 0x00;
548 p_nal->p_buffer[3] = 0x01;
551 memcpy( &p_nal->p_buffer[4], p, i_size );
557 static void CreateDecodedNAL( uint8_t **pp_ret, int *pi_ret,
558 const uint8_t *src, int i_src )
560 const uint8_t *end = &src[i_src];
561 uint8_t *dst = malloc( i_src );
569 if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
581 *pi_ret = dst - *pp_ret;
584 static inline int bs_read_ue( bs_t *s )
588 while( bs_read1( s ) == 0 && s->p < s->p_end && i < 32 )
592 return( ( 1 << i) - 1 + bs_read( s, i ) );
595 static inline int bs_read_se( bs_t *s )
597 int val = bs_read_ue( s );
599 return val&0x01 ? (val+1)/2 : -(val/2);
602 /*****************************************************************************
603 * ParseNALBlock: parses annexB type NALs
604 * All p_frag blocks are required to start with 0 0 0 1 4-byte startcode
605 *****************************************************************************/
606 static block_t *ParseNALBlock( decoder_t *p_dec, bool *pb_used_ts, block_t *p_frag )
608 decoder_sys_t *p_sys = p_dec->p_sys;
609 block_t *p_pic = NULL;
611 const int i_nal_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
612 const int i_nal_type = p_frag->p_buffer[4]&0x1f;
613 const mtime_t i_frag_dts = p_frag->i_dts;
614 const mtime_t i_frag_pts = p_frag->i_pts;
616 if( p_sys->b_slice && ( !p_sys->b_sps || !p_sys->b_pps ) )
618 block_ChainRelease( p_sys->p_frame );
619 msg_Warn( p_dec, "waiting for SPS/PPS" );
622 p_sys->slice.i_frame_type = 0;
623 p_sys->p_frame = NULL;
624 p_sys->b_frame_sps = false;
625 p_sys->b_frame_pps = false;
626 p_sys->b_slice = false;
627 cc_Flush( &p_sys->cc_next );
630 if( ( !p_sys->b_sps || !p_sys->b_pps ) &&
631 i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
633 p_sys->b_slice = true;
634 /* Fragment will be discarded later on */
636 else if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
641 ParseSlice( p_dec, &b_new_picture, &slice, i_nal_ref_idc, i_nal_type, p_frag );
644 if( b_new_picture && p_sys->b_slice )
645 p_pic = OutputPicture( p_dec );
648 p_sys->slice = slice;
649 p_sys->b_slice = true;
651 else if( i_nal_type == NAL_SPS )
654 p_pic = OutputPicture( p_dec );
655 p_sys->b_frame_sps = true;
657 PutSPS( p_dec, p_frag );
659 /* Do not append the SPS because we will insert it on keyframes */
662 else if( i_nal_type == NAL_PPS )
665 p_pic = OutputPicture( p_dec );
666 p_sys->b_frame_pps = true;
668 PutPPS( p_dec, p_frag );
670 /* Do not append the PPS because we will insert it on keyframes */
673 else if( i_nal_type == NAL_AU_DELIMITER ||
674 i_nal_type == NAL_SEI ||
675 ( i_nal_type >= 13 && i_nal_type <= 18 ) )
678 p_pic = OutputPicture( p_dec );
680 /* Parse SEI for CC support */
681 if( i_nal_type == NAL_SEI )
683 ParseSei( p_dec, p_frag );
685 else if( i_nal_type == NAL_AU_DELIMITER )
687 if( p_sys->p_frame && (p_sys->p_frame->i_flags & BLOCK_FLAG_PRIVATE_AUD) )
689 block_Release( p_frag );
694 p_frag->i_flags |= BLOCK_FLAG_PRIVATE_AUD;
699 /* Append the block */
701 block_ChainAppend( &p_sys->p_frame, p_frag );
704 if( p_sys->i_frame_dts <= VLC_TS_INVALID &&
705 p_sys->i_frame_pts <= VLC_TS_INVALID )
707 p_sys->i_frame_dts = i_frag_dts;
708 p_sys->i_frame_pts = i_frag_pts;
714 static block_t *OutputPicture( decoder_t *p_dec )
716 decoder_sys_t *p_sys = p_dec->p_sys;
719 if ( !p_sys->b_header && p_sys->i_recovery_frames != -1 )
721 if( p_sys->i_recovery_frames == 0 )
723 msg_Dbg( p_dec, "Recovery from SEI recovery point complete" );
724 p_sys->b_header = true;
726 --p_sys->i_recovery_frames;
729 if( !p_sys->b_header && p_sys->i_recovery_frames == -1 &&
730 p_sys->slice.i_frame_type != BLOCK_FLAG_TYPE_I)
733 const bool b_sps_pps_i = p_sys->slice.i_frame_type == BLOCK_FLAG_TYPE_I &&
736 if( b_sps_pps_i || p_sys->b_frame_sps || p_sys->b_frame_pps )
738 block_t *p_head = NULL;
739 if( p_sys->p_frame->i_flags & BLOCK_FLAG_PRIVATE_AUD )
741 p_head = p_sys->p_frame;
742 p_sys->p_frame = p_sys->p_frame->p_next;
745 block_t *p_list = NULL;
746 for( int i = 0; i < SPS_MAX && (b_sps_pps_i || p_sys->b_frame_sps); i++ )
748 if( p_sys->pp_sps[i] )
749 block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_sps[i] ) );
751 for( int i = 0; i < PPS_MAX && (b_sps_pps_i || p_sys->b_frame_pps); i++ )
753 if( p_sys->pp_pps[i] )
754 block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_pps[i] ) );
756 if( b_sps_pps_i && p_list )
757 p_sys->b_header = true;
760 p_head->p_next = p_list;
763 block_ChainAppend( &p_head, p_sys->p_frame );
765 p_pic = block_ChainGather( p_head );
769 p_pic = block_ChainGather( p_sys->p_frame );
771 p_pic->i_dts = p_sys->i_frame_dts;
772 p_pic->i_pts = p_sys->i_frame_pts;
773 p_pic->i_length = 0; /* FIXME */
774 p_pic->i_flags |= p_sys->slice.i_frame_type;
775 p_pic->i_flags &= ~BLOCK_FLAG_PRIVATE_AUD;
776 if( !p_sys->b_header )
777 p_pic->i_flags |= BLOCK_FLAG_PREROLL;
779 p_sys->slice.i_frame_type = 0;
780 p_sys->p_frame = NULL;
781 p_sys->i_frame_dts = VLC_TS_INVALID;
782 p_sys->i_frame_pts = VLC_TS_INVALID;
783 p_sys->b_frame_sps = false;
784 p_sys->b_frame_pps = false;
785 p_sys->b_slice = false;
788 p_sys->i_cc_pts = p_pic->i_pts;
789 p_sys->i_cc_dts = p_pic->i_dts;
790 p_sys->i_cc_flags = p_pic->i_flags;
793 cc_data_t cc_tmp = p_sys->cc;
794 p_sys->cc = p_sys->cc_next;
795 p_sys->cc_next = cc_tmp;
797 cc_Flush( &p_sys->cc_next );
802 static void PutSPS( decoder_t *p_dec, block_t *p_frag )
804 decoder_sys_t *p_sys = p_dec->p_sys;
806 uint8_t *pb_dec = NULL;
812 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
813 p_frag->i_buffer - 5 );
815 bs_init( &s, pb_dec, i_dec );
816 int i_profile_idc = bs_read( &s, 8 );
817 p_dec->fmt_out.i_profile = i_profile_idc;
818 /* Skip constraint_set0123, reserved(4) */
819 bs_skip( &s, 1+1+1+1 + 4 );
820 p_dec->fmt_out.i_level = bs_read( &s, 8 );
822 i_sps_id = bs_read_ue( &s );
823 if( i_sps_id >= SPS_MAX || i_sps_id < 0 )
825 msg_Warn( p_dec, "invalid SPS (sps_id=%d)", i_sps_id );
827 block_Release( p_frag );
831 if( i_profile_idc == 100 || i_profile_idc == 110 ||
832 i_profile_idc == 122 || i_profile_idc == 244 ||
833 i_profile_idc == 44 || i_profile_idc == 83 ||
834 i_profile_idc == 86 )
836 /* chroma_format_idc */
837 const int i_chroma_format_idc = bs_read_ue( &s );
838 if( i_chroma_format_idc == 3 )
839 bs_skip( &s, 1 ); /* separate_colour_plane_flag */
840 /* bit_depth_luma_minus8 */
842 /* bit_depth_chroma_minus8 */
844 /* qpprime_y_zero_transform_bypass_flag */
846 /* seq_scaling_matrix_present_flag */
847 i_tmp = bs_read( &s, 1 );
850 for( int i = 0; i < ((3 != i_chroma_format_idc) ? 8 : 12); i++ )
852 /* seq_scaling_list_present_flag[i] */
853 i_tmp = bs_read( &s, 1 );
856 const int i_size_of_scaling_list = (i < 6 ) ? 16 : 64;
857 /* scaling_list (...) */
860 for( int j = 0; j < i_size_of_scaling_list; j++ )
862 if( i_nextscale != 0 )
865 i_tmp = bs_read_se( &s );
866 i_nextscale = ( i_lastscale + i_tmp + 256 ) % 256;
867 /* useDefaultScalingMatrixFlag = ... */
870 i_lastscale = ( i_nextscale == 0 ) ? i_lastscale : i_nextscale;
876 /* Skip i_log2_max_frame_num */
877 p_sys->i_log2_max_frame_num = bs_read_ue( &s );
878 if( p_sys->i_log2_max_frame_num > 12)
879 p_sys->i_log2_max_frame_num = 12;
881 p_sys->i_pic_order_cnt_type = bs_read_ue( &s );
882 if( p_sys->i_pic_order_cnt_type == 0 )
884 /* skip i_log2_max_poc_lsb */
885 p_sys->i_log2_max_pic_order_cnt_lsb = bs_read_ue( &s );
886 if( p_sys->i_log2_max_pic_order_cnt_lsb > 12 )
887 p_sys->i_log2_max_pic_order_cnt_lsb = 12;
889 else if( p_sys->i_pic_order_cnt_type == 1 )
892 /* skip b_delta_pic_order_always_zero */
893 p_sys->i_delta_pic_order_always_zero_flag = bs_read( &s, 1 );
894 /* skip i_offset_for_non_ref_pic */
896 /* skip i_offset_for_top_to_bottom_field */
898 /* read i_num_ref_frames_in_poc_cycle */
899 i_cycle = bs_read_ue( &s );
900 if( i_cycle > 256 ) i_cycle = 256;
903 /* skip i_offset_for_ref_frame */
908 /* i_num_ref_frames */
910 /* b_gaps_in_frame_num_value_allowed */
914 p_dec->fmt_out.video.i_width = 16 * ( bs_read_ue( &s ) + 1 );
915 p_dec->fmt_out.video.i_height = 16 * ( bs_read_ue( &s ) + 1 );
917 /* b_frame_mbs_only */
918 p_sys->b_frame_mbs_only = bs_read( &s, 1 );
919 p_dec->fmt_out.video.i_height *= ( 2 - p_sys->b_frame_mbs_only );
920 if( p_sys->b_frame_mbs_only == 0 )
924 /* b_direct8x8_inference */
928 i_tmp = bs_read( &s, 1 );
942 i_tmp = bs_read( &s, 1 );
945 /* read the aspect ratio part if any */
946 i_tmp = bs_read( &s, 1 );
949 static const struct { int w, h; } sar[17] =
951 { 0, 0 }, { 1, 1 }, { 12, 11 }, { 10, 11 },
952 { 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 },
953 { 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 },
954 { 64, 33 }, { 160,99 }, { 4, 3 }, { 3, 2 },
957 int i_sar = bs_read( &s, 8 );
965 else if( i_sar == 255 )
967 w = bs_read( &s, 16 );
968 h = bs_read( &s, 16 );
976 if( w != 0 && h != 0 )
978 p_dec->fmt_out.video.i_sar_num = w;
979 p_dec->fmt_out.video.i_sar_den = h;
983 p_dec->fmt_out.video.i_sar_num = 1;
984 p_dec->fmt_out.video.i_sar_den = 1;
991 /* We have a new SPS */
993 msg_Dbg( p_dec, "found NAL_SPS (sps_id=%d)", i_sps_id );
996 if( p_sys->pp_sps[i_sps_id] )
997 block_Release( p_sys->pp_sps[i_sps_id] );
998 p_sys->pp_sps[i_sps_id] = p_frag;
1001 static void PutPPS( decoder_t *p_dec, block_t *p_frag )
1003 decoder_sys_t *p_sys = p_dec->p_sys;
1008 bs_init( &s, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
1009 i_pps_id = bs_read_ue( &s ); // pps id
1010 i_sps_id = bs_read_ue( &s ); // sps id
1011 if( i_pps_id >= PPS_MAX || i_sps_id >= SPS_MAX )
1013 msg_Warn( p_dec, "invalid PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
1014 block_Release( p_frag );
1017 bs_skip( &s, 1 ); // entropy coding mode flag
1018 p_sys->i_pic_order_present_flag = bs_read( &s, 1 );
1021 /* We have a new PPS */
1023 msg_Dbg( p_dec, "found NAL_PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
1024 p_sys->b_pps = true;
1026 if( p_sys->pp_pps[i_pps_id] )
1027 block_Release( p_sys->pp_pps[i_pps_id] );
1028 p_sys->pp_pps[i_pps_id] = p_frag;
1031 static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
1032 int i_nal_ref_idc, int i_nal_type, const block_t *p_frag )
1034 decoder_sys_t *p_sys = p_dec->p_sys;
1041 /* do not convert the whole frame */
1042 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
1043 __MIN( p_frag->i_buffer - 5, 60 ) );
1044 bs_init( &s, pb_dec, i_dec );
1046 /* first_mb_in_slice */
1047 /* int i_first_mb = */ bs_read_ue( &s );
1050 switch( (i_slice_type = bs_read_ue( &s )) )
1053 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
1056 slice.i_frame_type = BLOCK_FLAG_TYPE_B;
1059 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
1061 case 3: case 8: /* SP */
1062 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
1065 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
1068 slice.i_frame_type = 0;
1073 slice.i_nal_type = i_nal_type;
1074 slice.i_nal_ref_idc = i_nal_ref_idc;
1076 slice.i_pic_parameter_set_id = bs_read_ue( &s );
1077 slice.i_frame_num = bs_read( &s, p_sys->i_log2_max_frame_num + 4 );
1079 slice.i_field_pic_flag = 0;
1080 slice.i_bottom_field_flag = -1;
1081 if( !p_sys->b_frame_mbs_only )
1083 /* field_pic_flag */
1084 slice.i_field_pic_flag = bs_read( &s, 1 );
1085 if( slice.i_field_pic_flag )
1086 slice.i_bottom_field_flag = bs_read( &s, 1 );
1089 slice.i_idr_pic_id = p_sys->slice.i_idr_pic_id;
1090 if( slice.i_nal_type == NAL_SLICE_IDR )
1091 slice.i_idr_pic_id = bs_read_ue( &s );
1093 slice.i_pic_order_cnt_lsb = -1;
1094 slice.i_delta_pic_order_cnt_bottom = -1;
1095 slice.i_delta_pic_order_cnt0 = 0;
1096 slice.i_delta_pic_order_cnt1 = 0;
1097 if( p_sys->i_pic_order_cnt_type == 0 )
1099 slice.i_pic_order_cnt_lsb = bs_read( &s, p_sys->i_log2_max_pic_order_cnt_lsb + 4 );
1100 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
1101 slice.i_delta_pic_order_cnt_bottom = bs_read_se( &s );
1103 else if( (p_sys->i_pic_order_cnt_type == 1) &&
1104 (!p_sys->i_delta_pic_order_always_zero_flag) )
1106 slice.i_delta_pic_order_cnt0 = bs_read_se( &s );
1107 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
1108 slice.i_delta_pic_order_cnt1 = bs_read_se( &s );
1112 /* Detection of the first VCL NAL unit of a primary coded picture
1113 * (cf. 7.4.1.2.4) */
1115 if( slice.i_frame_num != p_sys->slice.i_frame_num ||
1116 slice.i_pic_parameter_set_id != p_sys->slice.i_pic_parameter_set_id ||
1117 slice.i_field_pic_flag != p_sys->slice.i_field_pic_flag ||
1118 slice.i_nal_ref_idc != p_sys->slice.i_nal_ref_idc )
1120 if( (slice.i_bottom_field_flag != -1) &&
1121 (p_sys->slice.i_bottom_field_flag != -1) &&
1122 (slice.i_bottom_field_flag != p_sys->slice.i_bottom_field_flag) )
1124 if( p_sys->i_pic_order_cnt_type == 0 &&
1125 ( slice.i_pic_order_cnt_lsb != p_sys->slice.i_pic_order_cnt_lsb ||
1126 slice.i_delta_pic_order_cnt_bottom != p_sys->slice.i_delta_pic_order_cnt_bottom ) )
1128 else if( p_sys->i_pic_order_cnt_type == 1 &&
1129 ( slice.i_delta_pic_order_cnt0 != p_sys->slice.i_delta_pic_order_cnt0 ||
1130 slice.i_delta_pic_order_cnt1 != p_sys->slice.i_delta_pic_order_cnt1 ) )
1132 if( ( slice.i_nal_type == NAL_SLICE_IDR || p_sys->slice.i_nal_type == NAL_SLICE_IDR ) &&
1133 ( slice.i_nal_type != p_sys->slice.i_nal_type || slice.i_idr_pic_id != p_sys->slice.i_idr_pic_id ) )
1137 *pb_new_picture = b_pic;
1141 static void ParseSei( decoder_t *p_dec, block_t *p_frag )
1143 decoder_sys_t *p_sys = p_dec->p_sys;
1148 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
1152 /* The +1 is for rbsp trailing bits */
1153 for( int i_used = 0; i_used+1 < i_dec; )
1157 while( i_used+1 < i_dec )
1159 const int i_byte = pb_dec[i_used++];
1161 if( i_byte != 0xff )
1166 while( i_used+1 < i_dec )
1168 const int i_byte = pb_dec[i_used++];
1170 if( i_byte != 0xff )
1174 if( i_used + i_size + 1 > i_dec )
1177 /* Look for user_data_registered_itu_t_t35 */
1180 static const uint8_t p_dvb1_data_start_code[] = {
1183 0x47, 0x41, 0x39, 0x34
1185 const int i_t35 = i_size;
1186 const uint8_t *p_t35 = &pb_dec[i_used];
1188 /* Check for we have DVB1_data() */
1190 !memcmp( p_t35, p_dvb1_data_start_code, sizeof(p_dvb1_data_start_code) ) )
1192 cc_Extract( &p_sys->cc_next, true, &p_t35[3], i_t35 - 3 );
1196 /* Look for SEI recovery point */
1200 const int i_rec = i_size;
1201 const uint8_t *p_rec = &pb_dec[i_used];
1203 bs_init( &s, p_rec, i_rec );
1204 int i_recovery_frames = bs_read_ue( &s );
1205 //bool b_exact_match = bs_read( &s, 1 );
1206 //bool b_broken_link = bs_read( &s, 1 );
1207 //int i_changing_slice_group = bs_read( &s, 2 );
1208 if( !p_sys->b_header )
1210 msg_Dbg( p_dec, "Seen SEI recovery point, %d recovery frames", i_recovery_frames );
1211 if ( p_sys->i_recovery_frames == -1 || i_recovery_frames < p_sys->i_recovery_frames )
1212 p_sys->i_recovery_frames = i_recovery_frames;