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];
106 int i_avcC_length_size;
108 /* Useful values of the Sequence Parameter Set */
109 int i_log2_max_frame_num;
110 int b_frame_mbs_only;
111 int i_pic_order_cnt_type;
112 int i_delta_pic_order_always_zero_flag;
113 int i_log2_max_pic_order_cnt_lsb;
115 /* Value from Picture Parameter Set */
116 int i_pic_order_present_flag;
118 /* Useful values of the Slice Header */
141 NAL_SLICE_IDR = 5, /* ref_idc != 0 */
142 NAL_SEI = 6, /* ref_idc == 0 */
146 /* ref_idc == 0 for 6,9,10,11,12 */
151 NAL_PRIORITY_DISPOSABLE = 0,
152 NAL_PRIORITY_LOW = 1,
153 NAL_PRIORITY_HIGH = 2,
154 NAL_PRIORITY_HIGHEST = 3,
157 #define BLOCK_FLAG_PRIVATE_AUD (1 << BLOCK_FLAG_PRIVATE_SHIFT)
159 static block_t *Packetize( decoder_t *, block_t ** );
160 static block_t *PacketizeAVC1( decoder_t *, block_t ** );
161 static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] );
163 static void PacketizeReset( void *p_private, bool b_broken );
164 static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t * );
165 static int PacketizeValidate( void *p_private, block_t * );
167 static block_t *ParseNALBlock( decoder_t *, bool *pb_used_ts, block_t * );
168 static block_t *CreateAnnexbNAL( decoder_t *, const uint8_t *p, int );
170 static block_t *OutputPicture( decoder_t *p_dec );
171 static void PutSPS( decoder_t *p_dec, block_t *p_frag );
172 static void PutPPS( decoder_t *p_dec, block_t *p_frag );
173 static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
174 int i_nal_ref_idc, int i_nal_type, const block_t *p_frag );
175 static void ParseSei( decoder_t *, block_t * );
178 static const uint8_t p_h264_startcode[3] = { 0x00, 0x00, 0x01 };
180 /*****************************************************************************
181 * Open: probe the packetizer and return score
182 * When opening after demux, the packetizer is only loaded AFTER the decoder
183 * That means that what you set in fmt_out is ignored by the decoder in this special case
184 *****************************************************************************/
185 static int Open( vlc_object_t *p_this )
187 decoder_t *p_dec = (decoder_t*)p_this;
188 decoder_sys_t *p_sys;
191 if( p_dec->fmt_in.i_codec != VLC_CODEC_H264 )
193 if( p_dec->fmt_in.i_original_fourcc == VLC_FOURCC( 'a', 'v', 'c', '1') &&
194 p_dec->fmt_in.i_extra < 7 )
197 /* Allocate the memory needed to store the decoder's structure */
198 if( ( p_dec->p_sys = p_sys = malloc( sizeof(decoder_sys_t) ) ) == NULL )
203 packetizer_Init( &p_sys->packetizer,
204 p_h264_startcode, sizeof(p_h264_startcode),
205 p_h264_startcode, 1, 5,
206 PacketizeReset, PacketizeParse, PacketizeValidate, p_dec );
208 p_sys->b_slice = false;
209 p_sys->p_frame = NULL;
210 p_sys->b_frame_sps = false;
211 p_sys->b_frame_pps = false;
213 p_sys->b_header= false;
214 p_sys->b_sps = false;
215 p_sys->b_pps = false;
216 for( i = 0; i < SPS_MAX; i++ )
217 p_sys->pp_sps[i] = NULL;
218 for( i = 0; i < PPS_MAX; i++ )
219 p_sys->pp_pps[i] = NULL;
221 p_sys->slice.i_nal_type = -1;
222 p_sys->slice.i_nal_ref_idc = -1;
223 p_sys->slice.i_idr_pic_id = -1;
224 p_sys->slice.i_frame_num = -1;
225 p_sys->slice.i_frame_type = 0;
226 p_sys->slice.i_pic_parameter_set_id = -1;
227 p_sys->slice.i_field_pic_flag = 0;
228 p_sys->slice.i_bottom_field_flag = -1;
229 p_sys->slice.i_pic_order_cnt_lsb = -1;
230 p_sys->slice.i_delta_pic_order_cnt_bottom = -1;
232 p_sys->i_frame_dts = VLC_TS_INVALID;
233 p_sys->i_frame_pts = VLC_TS_INVALID;
235 /* Setup properties */
236 es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
237 p_dec->fmt_out.i_codec = VLC_CODEC_H264;
239 if( p_dec->fmt_in.i_original_fourcc == VLC_FOURCC( 'a', 'v', 'c', '1' ) )
241 /* This type of stream is produced by mp4 and matroska
242 * when we want to store it in another streamformat, you need to convert
243 * The fmt_in.p_extra should ALWAYS contain the avcC
244 * The fmt_out.p_extra should contain all the SPS and PPS with 4 byte startcodes */
245 uint8_t *p = &((uint8_t*)p_dec->fmt_in.p_extra)[4];
251 p_sys->i_avcC_length_size = 1 + ((*p++)&0x03);
255 for( i = 0; i < i_sps; i++ )
257 uint16_t i_length = GetWBE( p ); p += 2;
259 (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
263 block_t *p_sps = CreateAnnexbNAL( p_dec, p, i_length );
266 ParseNALBlock( p_dec, &b_dummy, p_sps );
271 for( i = 0; i < i_pps; i++ )
273 uint16_t i_length = GetWBE( p ); p += 2;
275 (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
279 block_t *p_pps = CreateAnnexbNAL( p_dec, p, i_length );
282 ParseNALBlock( p_dec, &b_dummy, p_pps );
285 msg_Dbg( p_dec, "avcC length size=%d, sps=%d, pps=%d",
286 p_sys->i_avcC_length_size, i_sps, i_pps );
288 if( !p_sys->b_sps || !p_sys->b_pps )
291 /* FIXME: FFMPEG isn't happy at all if you leave this */
292 if( p_dec->fmt_out.i_extra > 0 )
293 free( p_dec->fmt_out.p_extra );
294 p_dec->fmt_out.i_extra = 0;
295 p_dec->fmt_out.p_extra = NULL;
297 /* Set the new extradata */
298 for( i = 0; i < SPS_MAX; i++ )
300 if( p_sys->pp_sps[i] )
301 p_dec->fmt_out.i_extra += p_sys->pp_sps[i]->i_buffer;
303 for( i = 0; i < PPS_MAX; i++ )
305 if( p_sys->pp_pps[i] )
306 p_dec->fmt_out.i_extra += p_sys->pp_pps[i]->i_buffer;
308 p_dec->fmt_out.p_extra = malloc( p_dec->fmt_out.i_extra );
309 if( p_dec->fmt_out.p_extra )
311 uint8_t *p_dst = p_dec->fmt_out.p_extra;
313 for( i = 0; i < SPS_MAX; i++ )
315 if( p_sys->pp_sps[i] )
317 memcpy( p_dst, p_sys->pp_sps[i]->p_buffer, p_sys->pp_sps[i]->i_buffer );
318 p_dst += p_sys->pp_sps[i]->i_buffer;
321 for( i = 0; i < PPS_MAX; i++ )
323 if( p_sys->pp_pps[i] )
325 memcpy( p_dst, p_sys->pp_pps[i]->p_buffer, p_sys->pp_pps[i]->i_buffer );
326 p_dst += p_sys->pp_pps[i]->i_buffer;
329 p_sys->b_header = true;
333 p_dec->fmt_out.i_extra = 0;
337 p_dec->pf_packetize = PacketizeAVC1;
342 /* This type of stream contains data with 3 of 4 byte startcodes
343 * The fmt_in.p_extra MAY contain SPS/PPS with 4 byte startcodes
344 * The fmt_out.p_extra should be the same */
347 p_dec->pf_packetize = Packetize;
348 p_dec->pf_get_cc = GetCc;
351 p_sys->i_cc_pts = VLC_TS_INVALID;
352 p_sys->i_cc_dts = VLC_TS_INVALID;
353 p_sys->i_cc_flags = 0;
354 cc_Init( &p_sys->cc );
355 cc_Init( &p_sys->cc_next );
358 if( p_dec->fmt_in.i_extra > 0 )
359 packetizer_Header( &p_sys->packetizer,
360 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
366 /*****************************************************************************
367 * Close: clean up the packetizer
368 *****************************************************************************/
369 static void Close( vlc_object_t *p_this )
371 decoder_t *p_dec = (decoder_t*)p_this;
372 decoder_sys_t *p_sys = p_dec->p_sys;
376 block_ChainRelease( p_sys->p_frame );
377 for( i = 0; i < SPS_MAX; i++ )
379 if( p_sys->pp_sps[i] )
380 block_Release( p_sys->pp_sps[i] );
382 for( i = 0; i < PPS_MAX; i++ )
384 if( p_sys->pp_pps[i] )
385 block_Release( p_sys->pp_pps[i] );
387 packetizer_Clean( &p_sys->packetizer );
389 if( p_dec->pf_get_cc )
391 cc_Exit( &p_sys->cc_next );
392 cc_Exit( &p_sys->cc );
398 /****************************************************************************
399 * Packetize: the whole thing
400 * Search for the startcodes 3 or more bytes
401 * Feed ParseNALBlock ALWAYS with 4 byte startcode prepended NALs
402 ****************************************************************************/
403 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
405 decoder_sys_t *p_sys = p_dec->p_sys;
407 return packetizer_Packetize( &p_sys->packetizer, pp_block );
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]; )
440 for( i = 0; i < p_sys->i_avcC_length_size; i++ )
442 i_size = (i_size << 8) | (*p++);
446 i_size > ( p_block->p_buffer + p_block->i_buffer - p ) )
448 msg_Err( p_dec, "Broken frame : size %d is too big", i_size );
452 block_t *p_part = CreateAnnexbNAL( p_dec, p, i_size );
456 p_part->i_dts = p_block->i_dts;
457 p_part->i_pts = p_block->i_pts;
460 if( ( p_pic = ParseNALBlock( p_dec, &b_dummy, p_part ) ) )
462 block_ChainAppend( &p_ret, p_pic );
466 block_Release( p_block );
471 /*****************************************************************************
473 *****************************************************************************/
474 static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] )
476 decoder_sys_t *p_sys = p_dec->p_sys;
479 for( int i = 0; i < 4; i++ )
480 pb_present[i] = p_sys->cc.pb_present[i];
482 if( p_sys->cc.i_data <= 0 )
485 p_cc = block_New( p_dec, p_sys->cc.i_data);
488 memcpy( p_cc->p_buffer, p_sys->cc.p_data, p_sys->cc.i_data );
490 p_cc->i_pts = p_sys->cc.b_reorder ? p_sys->i_cc_pts : p_sys->i_cc_dts;
491 p_cc->i_flags = ( p_sys->cc.b_reorder ? p_sys->i_cc_flags : BLOCK_FLAG_TYPE_P ) & BLOCK_FLAG_TYPE_MASK;
493 cc_Flush( &p_sys->cc );
497 /****************************************************************************
499 ****************************************************************************/
500 static void PacketizeReset( void *p_private, bool b_broken )
502 decoder_t *p_dec = p_private;
503 decoder_sys_t *p_sys = p_dec->p_sys;
508 block_ChainRelease( p_sys->p_frame );
509 p_sys->p_frame = NULL;
510 p_sys->b_frame_sps = false;
511 p_sys->b_frame_pps = false;
512 p_sys->slice.i_frame_type = 0;
513 p_sys->b_slice = false;
515 p_sys->i_frame_pts = VLC_TS_INVALID;
516 p_sys->i_frame_dts = VLC_TS_INVALID;
518 static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t *p_block )
520 decoder_t *p_dec = p_private;
522 /* Remove trailing 0 bytes */
523 while( p_block->i_buffer > 5 && p_block->p_buffer[p_block->i_buffer-1] == 0x00 )
526 return ParseNALBlock( p_dec, pb_ts_used, p_block );
528 static int PacketizeValidate( void *p_private, block_t *p_au )
530 VLC_UNUSED(p_private);
535 static block_t *CreateAnnexbNAL( decoder_t *p_dec, const uint8_t *p, int i_size )
539 p_nal = block_New( p_dec, 4 + i_size );
540 if( !p_nal ) return NULL;
543 p_nal->p_buffer[0] = 0x00;
544 p_nal->p_buffer[1] = 0x00;
545 p_nal->p_buffer[2] = 0x00;
546 p_nal->p_buffer[3] = 0x01;
549 memcpy( &p_nal->p_buffer[4], p, i_size );
555 static void CreateDecodedNAL( uint8_t **pp_ret, int *pi_ret,
556 const uint8_t *src, int i_src )
558 const uint8_t *end = &src[i_src];
559 uint8_t *dst = malloc( i_src );
567 if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
579 *pi_ret = dst - *pp_ret;
582 static inline int bs_read_ue( bs_t *s )
586 while( bs_read1( s ) == 0 && s->p < s->p_end && i < 32 )
590 return( ( 1 << i) - 1 + bs_read( s, i ) );
593 static inline int bs_read_se( bs_t *s )
595 int val = bs_read_ue( s );
597 return val&0x01 ? (val+1)/2 : -(val/2);
600 /*****************************************************************************
601 * ParseNALBlock: parses annexB type NALs
602 * All p_frag blocks are required to start with 0 0 0 1 4-byte startcode
603 *****************************************************************************/
604 static block_t *ParseNALBlock( decoder_t *p_dec, bool *pb_used_ts, block_t *p_frag )
606 decoder_sys_t *p_sys = p_dec->p_sys;
607 block_t *p_pic = NULL;
609 const int i_nal_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
610 const int i_nal_type = p_frag->p_buffer[4]&0x1f;
611 const mtime_t i_frag_dts = p_frag->i_dts;
612 const mtime_t i_frag_pts = p_frag->i_pts;
614 if( p_sys->b_slice && ( !p_sys->b_sps || !p_sys->b_pps ) )
616 block_ChainRelease( p_sys->p_frame );
617 msg_Warn( p_dec, "waiting for SPS/PPS" );
620 p_sys->slice.i_frame_type = 0;
621 p_sys->p_frame = NULL;
622 p_sys->b_frame_sps = false;
623 p_sys->b_frame_pps = false;
624 p_sys->b_slice = false;
625 cc_Flush( &p_sys->cc_next );
628 if( ( !p_sys->b_sps || !p_sys->b_pps ) &&
629 i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
631 p_sys->b_slice = true;
632 /* Fragment will be discarded later on */
634 else if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
639 ParseSlice( p_dec, &b_new_picture, &slice, i_nal_ref_idc, i_nal_type, p_frag );
642 if( b_new_picture && p_sys->b_slice )
643 p_pic = OutputPicture( p_dec );
646 p_sys->slice = slice;
647 p_sys->b_slice = true;
649 else if( i_nal_type == NAL_SPS )
652 p_pic = OutputPicture( p_dec );
653 p_sys->b_frame_sps = true;
655 PutSPS( p_dec, p_frag );
657 /* Do not append the SPS because we will insert it on keyframes */
660 else if( i_nal_type == NAL_PPS )
663 p_pic = OutputPicture( p_dec );
664 p_sys->b_frame_pps = true;
666 PutPPS( p_dec, p_frag );
668 /* Do not append the PPS because we will insert it on keyframes */
671 else if( i_nal_type == NAL_AU_DELIMITER ||
672 i_nal_type == NAL_SEI ||
673 ( i_nal_type >= 13 && i_nal_type <= 18 ) )
676 p_pic = OutputPicture( p_dec );
678 /* Parse SEI for CC support */
679 if( i_nal_type == NAL_SEI )
681 ParseSei( p_dec, p_frag );
683 else if( i_nal_type == NAL_AU_DELIMITER )
685 if( p_sys->p_frame && (p_sys->p_frame->i_flags & BLOCK_FLAG_PRIVATE_AUD) )
687 block_Release( p_frag );
692 p_frag->i_flags |= BLOCK_FLAG_PRIVATE_AUD;
697 /* Append the block */
699 block_ChainAppend( &p_sys->p_frame, p_frag );
702 if( p_sys->i_frame_dts <= VLC_TS_INVALID &&
703 p_sys->i_frame_pts <= VLC_TS_INVALID )
705 p_sys->i_frame_dts = i_frag_dts;
706 p_sys->i_frame_pts = i_frag_pts;
712 static block_t *OutputPicture( decoder_t *p_dec )
714 decoder_sys_t *p_sys = p_dec->p_sys;
717 if( !p_sys->b_header && p_sys->slice.i_frame_type != BLOCK_FLAG_TYPE_I)
720 const bool b_sps_pps_i = p_sys->slice.i_frame_type == BLOCK_FLAG_TYPE_I &&
723 if( b_sps_pps_i || p_sys->b_frame_sps || p_sys->b_frame_pps )
725 block_t *p_head = NULL;
726 if( p_sys->p_frame->i_flags & BLOCK_FLAG_PRIVATE_AUD )
728 p_head = p_sys->p_frame;
729 p_sys->p_frame = p_sys->p_frame->p_next;
732 block_t *p_list = NULL;
733 for( int i = 0; i < SPS_MAX && (b_sps_pps_i || p_sys->b_frame_sps); i++ )
735 if( p_sys->pp_sps[i] )
736 block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_sps[i] ) );
738 for( int i = 0; i < PPS_MAX && (b_sps_pps_i || p_sys->b_frame_pps); i++ )
740 if( p_sys->pp_pps[i] )
741 block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_pps[i] ) );
743 if( b_sps_pps_i && p_list )
744 p_sys->b_header = true;
747 p_head->p_next = p_list;
750 block_ChainAppend( &p_head, p_sys->p_frame );
752 p_pic = block_ChainGather( p_head );
756 p_pic = block_ChainGather( p_sys->p_frame );
758 p_pic->i_dts = p_sys->i_frame_dts;
759 p_pic->i_pts = p_sys->i_frame_pts;
760 p_pic->i_length = 0; /* FIXME */
761 p_pic->i_flags |= p_sys->slice.i_frame_type;
762 p_pic->i_flags &= ~BLOCK_FLAG_PRIVATE_AUD;
764 p_sys->slice.i_frame_type = 0;
765 p_sys->p_frame = NULL;
766 p_sys->i_frame_dts = VLC_TS_INVALID;
767 p_sys->i_frame_pts = VLC_TS_INVALID;
768 p_sys->b_frame_sps = false;
769 p_sys->b_frame_pps = false;
770 p_sys->b_slice = false;
773 p_sys->i_cc_pts = p_pic->i_pts;
774 p_sys->i_cc_dts = p_pic->i_dts;
775 p_sys->i_cc_flags = p_pic->i_flags;
778 cc_data_t cc_tmp = p_sys->cc;
779 p_sys->cc = p_sys->cc_next;
780 p_sys->cc_next = cc_tmp;
782 cc_Flush( &p_sys->cc_next );
787 static void PutSPS( decoder_t *p_dec, block_t *p_frag )
789 decoder_sys_t *p_sys = p_dec->p_sys;
791 uint8_t *pb_dec = NULL;
797 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
798 p_frag->i_buffer - 5 );
800 bs_init( &s, pb_dec, i_dec );
801 int i_profile_idc = bs_read( &s, 8 );
802 p_dec->fmt_out.i_profile = i_profile_idc;
803 /* Skip constraint_set0123, reserved(4) */
804 bs_skip( &s, 1+1+1+1 + 4 );
805 p_dec->fmt_out.i_level = bs_read( &s, 8 );
807 i_sps_id = bs_read_ue( &s );
808 if( i_sps_id >= SPS_MAX )
810 msg_Warn( p_dec, "invalid SPS (sps_id=%d)", i_sps_id );
812 block_Release( p_frag );
816 if( i_profile_idc == 100 || i_profile_idc == 110 ||
817 i_profile_idc == 122 || i_profile_idc == 244 ||
818 i_profile_idc == 44 || i_profile_idc == 83 ||
819 i_profile_idc == 86 )
821 /* chroma_format_idc */
822 const int i_chroma_format_idc = bs_read_ue( &s );
823 if( i_chroma_format_idc == 3 )
824 bs_skip( &s, 1 ); /* separate_colour_plane_flag */
825 /* bit_depth_luma_minus8 */
827 /* bit_depth_chroma_minus8 */
829 /* qpprime_y_zero_transform_bypass_flag */
831 /* seq_scaling_matrix_present_flag */
832 i_tmp = bs_read( &s, 1 );
835 for( int i = 0; i < ((3 != i_chroma_format_idc) ? 8 : 12); i++ )
837 /* seq_scaling_list_present_flag[i] */
838 i_tmp = bs_read( &s, 1 );
841 const int i_size_of_scaling_list = (i < 6 ) ? 16 : 64;
842 /* scaling_list (...) */
845 for( int j = 0; j < i_size_of_scaling_list; j++ )
847 if( i_nextscale != 0 )
850 i_tmp = bs_read_se( &s );
851 i_nextscale = ( i_lastscale + i_tmp + 256 ) % 256;
852 /* useDefaultScalingMatrixFlag = ... */
855 i_lastscale = ( i_nextscale == 0 ) ? i_lastscale : i_nextscale;
861 /* Skip i_log2_max_frame_num */
862 p_sys->i_log2_max_frame_num = bs_read_ue( &s );
863 if( p_sys->i_log2_max_frame_num > 12)
864 p_sys->i_log2_max_frame_num = 12;
866 p_sys->i_pic_order_cnt_type = bs_read_ue( &s );
867 if( p_sys->i_pic_order_cnt_type == 0 )
869 /* skip i_log2_max_poc_lsb */
870 p_sys->i_log2_max_pic_order_cnt_lsb = bs_read_ue( &s );
871 if( p_sys->i_log2_max_pic_order_cnt_lsb > 12 )
872 p_sys->i_log2_max_pic_order_cnt_lsb = 12;
874 else if( p_sys->i_pic_order_cnt_type == 1 )
877 /* skip b_delta_pic_order_always_zero */
878 p_sys->i_delta_pic_order_always_zero_flag = bs_read( &s, 1 );
879 /* skip i_offset_for_non_ref_pic */
881 /* skip i_offset_for_top_to_bottom_field */
883 /* read i_num_ref_frames_in_poc_cycle */
884 i_cycle = bs_read_ue( &s );
885 if( i_cycle > 256 ) i_cycle = 256;
888 /* skip i_offset_for_ref_frame */
893 /* i_num_ref_frames */
895 /* b_gaps_in_frame_num_value_allowed */
899 p_dec->fmt_out.video.i_width = 16 * ( bs_read_ue( &s ) + 1 );
900 p_dec->fmt_out.video.i_height = 16 * ( bs_read_ue( &s ) + 1 );
902 /* b_frame_mbs_only */
903 p_sys->b_frame_mbs_only = bs_read( &s, 1 );
904 if( p_sys->b_frame_mbs_only == 0 )
908 /* b_direct8x8_inference */
912 i_tmp = bs_read( &s, 1 );
926 i_tmp = bs_read( &s, 1 );
929 /* read the aspect ratio part if any */
930 i_tmp = bs_read( &s, 1 );
933 static const struct { int w, h; } sar[17] =
935 { 0, 0 }, { 1, 1 }, { 12, 11 }, { 10, 11 },
936 { 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 },
937 { 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 },
938 { 64, 33 }, { 160,99 }, { 4, 3 }, { 3, 2 },
941 int i_sar = bs_read( &s, 8 );
949 else if( i_sar == 255 )
951 w = bs_read( &s, 16 );
952 h = bs_read( &s, 16 );
960 if( w != 0 && h != 0 )
962 p_dec->fmt_out.video.i_sar_num = w;
963 p_dec->fmt_out.video.i_sar_den = h;
967 p_dec->fmt_out.video.i_sar_num = 1;
968 p_dec->fmt_out.video.i_sar_den = 1;
975 /* We have a new SPS */
977 msg_Dbg( p_dec, "found NAL_SPS (sps_id=%d)", i_sps_id );
980 if( p_sys->pp_sps[i_sps_id] )
981 block_Release( p_sys->pp_sps[i_sps_id] );
982 p_sys->pp_sps[i_sps_id] = p_frag;
985 static void PutPPS( decoder_t *p_dec, block_t *p_frag )
987 decoder_sys_t *p_sys = p_dec->p_sys;
992 bs_init( &s, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
993 i_pps_id = bs_read_ue( &s ); // pps id
994 i_sps_id = bs_read_ue( &s ); // sps id
995 if( i_pps_id >= PPS_MAX || i_sps_id >= SPS_MAX )
997 msg_Warn( p_dec, "invalid PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
998 block_Release( p_frag );
1001 bs_skip( &s, 1 ); // entropy coding mode flag
1002 p_sys->i_pic_order_present_flag = bs_read( &s, 1 );
1005 /* We have a new PPS */
1007 msg_Dbg( p_dec, "found NAL_PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
1008 p_sys->b_pps = true;
1010 if( p_sys->pp_pps[i_pps_id] )
1011 block_Release( p_sys->pp_pps[i_pps_id] );
1012 p_sys->pp_pps[i_pps_id] = p_frag;
1015 static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
1016 int i_nal_ref_idc, int i_nal_type, const block_t *p_frag )
1018 decoder_sys_t *p_sys = p_dec->p_sys;
1021 int i_first_mb, i_slice_type;
1025 /* do not convert the whole frame */
1026 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
1027 __MIN( p_frag->i_buffer - 5, 60 ) );
1028 bs_init( &s, pb_dec, i_dec );
1030 /* first_mb_in_slice */
1031 i_first_mb = bs_read_ue( &s );
1034 switch( (i_slice_type = bs_read_ue( &s )) )
1037 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
1040 slice.i_frame_type = BLOCK_FLAG_TYPE_B;
1043 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
1045 case 3: case 8: /* SP */
1046 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
1049 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
1052 slice.i_frame_type = 0;
1057 slice.i_nal_type = i_nal_type;
1058 slice.i_nal_ref_idc = i_nal_ref_idc;
1060 slice.i_pic_parameter_set_id = bs_read_ue( &s );
1061 slice.i_frame_num = bs_read( &s, p_sys->i_log2_max_frame_num + 4 );
1063 slice.i_field_pic_flag = 0;
1064 slice.i_bottom_field_flag = -1;
1065 if( !p_sys->b_frame_mbs_only )
1067 /* field_pic_flag */
1068 slice.i_field_pic_flag = bs_read( &s, 1 );
1069 if( slice.i_field_pic_flag )
1070 slice.i_bottom_field_flag = bs_read( &s, 1 );
1073 slice.i_idr_pic_id = p_sys->slice.i_idr_pic_id;
1074 if( slice.i_nal_type == NAL_SLICE_IDR )
1075 slice.i_idr_pic_id = bs_read_ue( &s );
1077 slice.i_pic_order_cnt_lsb = -1;
1078 slice.i_delta_pic_order_cnt_bottom = -1;
1079 slice.i_delta_pic_order_cnt0 = 0;
1080 slice.i_delta_pic_order_cnt1 = 0;
1081 if( p_sys->i_pic_order_cnt_type == 0 )
1083 slice.i_pic_order_cnt_lsb = bs_read( &s, p_sys->i_log2_max_pic_order_cnt_lsb + 4 );
1084 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
1085 slice.i_delta_pic_order_cnt_bottom = bs_read_se( &s );
1087 else if( (p_sys->i_pic_order_cnt_type == 1) &&
1088 (!p_sys->i_delta_pic_order_always_zero_flag) )
1090 slice.i_delta_pic_order_cnt0 = bs_read_se( &s );
1091 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
1092 slice.i_delta_pic_order_cnt1 = bs_read_se( &s );
1096 /* Detection of the first VCL NAL unit of a primary coded picture
1097 * (cf. 7.4.1.2.4) */
1099 if( slice.i_frame_num != p_sys->slice.i_frame_num ||
1100 slice.i_pic_parameter_set_id != p_sys->slice.i_pic_parameter_set_id ||
1101 slice.i_field_pic_flag != p_sys->slice.i_field_pic_flag ||
1102 slice.i_nal_ref_idc != p_sys->slice.i_nal_ref_idc )
1104 if( (slice.i_bottom_field_flag != -1) &&
1105 (p_sys->slice.i_bottom_field_flag != -1) &&
1106 (slice.i_bottom_field_flag != p_sys->slice.i_bottom_field_flag) )
1108 if( p_sys->i_pic_order_cnt_type == 0 &&
1109 ( slice.i_pic_order_cnt_lsb != p_sys->slice.i_pic_order_cnt_lsb ||
1110 slice.i_delta_pic_order_cnt_bottom != p_sys->slice.i_delta_pic_order_cnt_bottom ) )
1112 else if( p_sys->i_pic_order_cnt_type == 1 &&
1113 ( slice.i_delta_pic_order_cnt0 != p_sys->slice.i_delta_pic_order_cnt0 ||
1114 slice.i_delta_pic_order_cnt1 != p_sys->slice.i_delta_pic_order_cnt1 ) )
1116 if( ( slice.i_nal_type == NAL_SLICE_IDR || p_sys->slice.i_nal_type == NAL_SLICE_IDR ) &&
1117 ( slice.i_nal_type != p_sys->slice.i_nal_type || slice.i_idr_pic_id != p_sys->slice.i_idr_pic_id ) )
1121 *pb_new_picture = b_pic;
1125 static void ParseSei( decoder_t *p_dec, block_t *p_frag )
1127 decoder_sys_t *p_sys = p_dec->p_sys;
1132 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
1136 /* The +1 is for rbsp trailing bits */
1137 for( int i_used = 0; i_used+1 < i_dec; )
1141 while( i_used+1 < i_dec )
1143 const int i_byte = pb_dec[i_used++];
1145 if( i_byte != 0xff )
1150 while( i_used+1 < i_dec )
1152 const int i_byte = pb_dec[i_used++];
1154 if( i_byte != 0xff )
1158 if( i_used + i_size + 1 > i_dec )
1161 /* Look for user_data_registered_itu_t_t35 */
1164 static const uint8_t p_dvb1_data_start_code[] = {
1167 0x47, 0x41, 0x39, 0x34
1169 const int i_t35 = i_size;
1170 const uint8_t *p_t35 = &pb_dec[i_used];
1172 /* Check for we have DVB1_data() */
1174 !memcmp( p_t35, p_dvb1_data_start_code, sizeof(p_dvb1_data_start_code) ) )
1176 cc_Extract( &p_sys->cc_next, true, &p_t35[3], i_t35 - 3 );