1 /*****************************************************************************
2 * h264.c: h264/avc video packetizer
3 *****************************************************************************
4 * Copyright (C) 2001, 2002, 2006 VLC authors and VideoLAN
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 it
13 * under the terms of the GNU Lesser General Public License as published by
14 * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
22 * You should have received a copy of the GNU Lesser General Public License
23 * along with this program; if not, write to the Free Software Foundation,
24 * 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"
45 #include "../demux/mpeg/mpeg_parser_helpers.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 */
150 #define BLOCK_FLAG_PRIVATE_AUD (1 << BLOCK_FLAG_PRIVATE_SHIFT)
152 static block_t *Packetize( decoder_t *, block_t ** );
153 static block_t *PacketizeAVC1( decoder_t *, block_t ** );
154 static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] );
156 static void PacketizeReset( void *p_private, bool b_broken );
157 static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t * );
158 static int PacketizeValidate( void *p_private, block_t * );
160 static block_t *ParseNALBlock( decoder_t *, bool *pb_ts_used, block_t * );
161 static block_t *CreateAnnexbNAL( decoder_t *, const uint8_t *p, int );
163 static block_t *OutputPicture( decoder_t *p_dec );
164 static void PutSPS( decoder_t *p_dec, block_t *p_frag );
165 static void PutPPS( decoder_t *p_dec, block_t *p_frag );
166 static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
167 int i_nal_ref_idc, int i_nal_type, const block_t *p_frag );
168 static void ParseSei( decoder_t *, block_t * );
171 static const uint8_t p_h264_startcode[3] = { 0x00, 0x00, 0x01 };
173 /*****************************************************************************
174 * Open: probe the packetizer and return score
175 * When opening after demux, the packetizer is only loaded AFTER the decoder
176 * That means that what you set in fmt_out is ignored by the decoder in this special case
177 *****************************************************************************/
178 static int Open( vlc_object_t *p_this )
180 decoder_t *p_dec = (decoder_t*)p_this;
181 decoder_sys_t *p_sys;
184 if( p_dec->fmt_in.i_codec != VLC_CODEC_H264 )
186 if( p_dec->fmt_in.i_original_fourcc == VLC_FOURCC( 'a', 'v', 'c', '1') &&
187 p_dec->fmt_in.i_extra < 7 )
190 /* Allocate the memory needed to store the decoder's structure */
191 if( ( p_dec->p_sys = p_sys = malloc( sizeof(decoder_sys_t) ) ) == NULL )
196 packetizer_Init( &p_sys->packetizer,
197 p_h264_startcode, sizeof(p_h264_startcode),
198 p_h264_startcode, 1, 5,
199 PacketizeReset, PacketizeParse, PacketizeValidate, p_dec );
201 p_sys->b_slice = false;
202 p_sys->p_frame = NULL;
203 p_sys->b_frame_sps = false;
204 p_sys->b_frame_pps = false;
206 p_sys->b_header= false;
207 p_sys->b_sps = false;
208 p_sys->b_pps = false;
209 for( i = 0; i < SPS_MAX; i++ )
210 p_sys->pp_sps[i] = NULL;
211 for( i = 0; i < PPS_MAX; i++ )
212 p_sys->pp_pps[i] = NULL;
213 p_sys->i_recovery_frames = -1;
215 p_sys->slice.i_nal_type = -1;
216 p_sys->slice.i_nal_ref_idc = -1;
217 p_sys->slice.i_idr_pic_id = -1;
218 p_sys->slice.i_frame_num = -1;
219 p_sys->slice.i_frame_type = 0;
220 p_sys->slice.i_pic_parameter_set_id = -1;
221 p_sys->slice.i_field_pic_flag = 0;
222 p_sys->slice.i_bottom_field_flag = -1;
223 p_sys->slice.i_pic_order_cnt_lsb = -1;
224 p_sys->slice.i_delta_pic_order_cnt_bottom = -1;
226 p_sys->i_frame_dts = VLC_TS_INVALID;
227 p_sys->i_frame_pts = VLC_TS_INVALID;
229 /* Setup properties */
230 es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
231 p_dec->fmt_out.i_codec = VLC_CODEC_H264;
233 if( p_dec->fmt_in.i_original_fourcc == VLC_FOURCC( 'a', 'v', 'c', '1' ) )
235 /* This type of stream is produced by mp4 and matroska
236 * when we want to store it in another streamformat, you need to convert
237 * The fmt_in.p_extra should ALWAYS contain the avcC
238 * The fmt_out.p_extra should contain all the SPS and PPS with 4 byte startcodes */
239 uint8_t *p = &((uint8_t*)p_dec->fmt_in.p_extra)[4];
245 p_sys->i_avcC_length_size = 1 + ((*p++)&0x03);
249 for( i = 0; i < i_sps; i++ )
251 uint16_t i_length = GetWBE( p ); p += 2;
253 (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
257 block_t *p_sps = CreateAnnexbNAL( p_dec, p, i_length );
260 ParseNALBlock( p_dec, &b_dummy, p_sps );
265 for( i = 0; i < i_pps; i++ )
267 uint16_t i_length = GetWBE( p ); p += 2;
269 (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
273 block_t *p_pps = CreateAnnexbNAL( p_dec, p, i_length );
276 ParseNALBlock( p_dec, &b_dummy, p_pps );
279 msg_Dbg( p_dec, "avcC length size=%d, sps=%d, pps=%d",
280 p_sys->i_avcC_length_size, i_sps, i_pps );
282 if( !p_sys->b_sps || !p_sys->b_pps )
285 /* FIXME: FFMPEG isn't happy at all if you leave this */
286 if( p_dec->fmt_out.i_extra > 0 )
287 free( p_dec->fmt_out.p_extra );
288 p_dec->fmt_out.i_extra = 0;
289 p_dec->fmt_out.p_extra = NULL;
291 /* Set the new extradata */
292 for( i = 0; i < SPS_MAX; i++ )
294 if( p_sys->pp_sps[i] )
295 p_dec->fmt_out.i_extra += p_sys->pp_sps[i]->i_buffer;
297 for( i = 0; i < PPS_MAX; i++ )
299 if( p_sys->pp_pps[i] )
300 p_dec->fmt_out.i_extra += p_sys->pp_pps[i]->i_buffer;
302 p_dec->fmt_out.p_extra = malloc( p_dec->fmt_out.i_extra );
303 if( p_dec->fmt_out.p_extra )
305 uint8_t *p_dst = p_dec->fmt_out.p_extra;
307 for( i = 0; i < SPS_MAX; i++ )
309 if( p_sys->pp_sps[i] )
311 memcpy( p_dst, p_sys->pp_sps[i]->p_buffer, p_sys->pp_sps[i]->i_buffer );
312 p_dst += p_sys->pp_sps[i]->i_buffer;
315 for( i = 0; i < PPS_MAX; i++ )
317 if( p_sys->pp_pps[i] )
319 memcpy( p_dst, p_sys->pp_pps[i]->p_buffer, p_sys->pp_pps[i]->i_buffer );
320 p_dst += p_sys->pp_pps[i]->i_buffer;
323 p_sys->b_header = true;
327 p_dec->fmt_out.i_extra = 0;
331 p_dec->pf_packetize = PacketizeAVC1;
336 /* This type of stream contains data with 3 of 4 byte startcodes
337 * The fmt_in.p_extra MAY contain SPS/PPS with 4 byte startcodes
338 * The fmt_out.p_extra should be the same */
341 p_dec->pf_packetize = Packetize;
342 p_dec->pf_get_cc = GetCc;
345 p_sys->i_cc_pts = VLC_TS_INVALID;
346 p_sys->i_cc_dts = VLC_TS_INVALID;
347 p_sys->i_cc_flags = 0;
348 cc_Init( &p_sys->cc );
349 cc_Init( &p_sys->cc_next );
352 if( p_dec->fmt_in.i_extra > 0 )
353 packetizer_Header( &p_sys->packetizer,
354 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
360 /*****************************************************************************
361 * Close: clean up the packetizer
362 *****************************************************************************/
363 static void Close( vlc_object_t *p_this )
365 decoder_t *p_dec = (decoder_t*)p_this;
366 decoder_sys_t *p_sys = p_dec->p_sys;
370 block_ChainRelease( p_sys->p_frame );
371 for( i = 0; i < SPS_MAX; i++ )
373 if( p_sys->pp_sps[i] )
374 block_Release( p_sys->pp_sps[i] );
376 for( i = 0; i < PPS_MAX; i++ )
378 if( p_sys->pp_pps[i] )
379 block_Release( p_sys->pp_pps[i] );
381 packetizer_Clean( &p_sys->packetizer );
383 if( p_dec->pf_get_cc )
385 cc_Exit( &p_sys->cc_next );
386 cc_Exit( &p_sys->cc );
392 /****************************************************************************
393 * Packetize: the whole thing
394 * Search for the startcodes 3 or more bytes
395 * Feed ParseNALBlock ALWAYS with 4 byte startcode prepended NALs
396 ****************************************************************************/
397 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
399 decoder_sys_t *p_sys = p_dec->p_sys;
401 return packetizer_Packetize( &p_sys->packetizer, pp_block );
404 /****************************************************************************
405 * PacketizeAVC1: Takes VCL blocks of data and creates annexe B type NAL stream
406 * Will always use 4 byte 0 0 0 1 startcodes
407 * Will prepend a SPS and PPS before each keyframe
408 ****************************************************************************/
409 static block_t *PacketizeAVC1( decoder_t *p_dec, block_t **pp_block )
411 decoder_sys_t *p_sys = p_dec->p_sys;
413 block_t *p_ret = NULL;
416 if( !pp_block || !*pp_block )
418 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
420 block_Release( *pp_block );
427 for( p = p_block->p_buffer; p < &p_block->p_buffer[p_block->i_buffer]; )
434 for( i = 0; i < p_sys->i_avcC_length_size; i++ )
436 i_size = (i_size << 8) | (*p++);
440 i_size > ( p_block->p_buffer + p_block->i_buffer - p ) )
442 msg_Err( p_dec, "Broken frame : size %d is too big", i_size );
446 block_t *p_part = CreateAnnexbNAL( p_dec, p, i_size );
450 p_part->i_dts = p_block->i_dts;
451 p_part->i_pts = p_block->i_pts;
454 if( ( p_pic = ParseNALBlock( p_dec, &b_dummy, p_part ) ) )
456 block_ChainAppend( &p_ret, p_pic );
460 block_Release( p_block );
465 /*****************************************************************************
467 *****************************************************************************/
468 static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] )
470 decoder_sys_t *p_sys = p_dec->p_sys;
473 for( int i = 0; i < 4; i++ )
474 pb_present[i] = p_sys->cc.pb_present[i];
476 if( p_sys->cc.i_data <= 0 )
479 p_cc = block_Alloc( p_sys->cc.i_data);
482 memcpy( p_cc->p_buffer, p_sys->cc.p_data, p_sys->cc.i_data );
484 p_cc->i_pts = p_sys->cc.b_reorder ? p_sys->i_cc_pts : p_sys->i_cc_dts;
485 p_cc->i_flags = ( p_sys->cc.b_reorder ? p_sys->i_cc_flags : BLOCK_FLAG_TYPE_P ) & BLOCK_FLAG_TYPE_MASK;
487 cc_Flush( &p_sys->cc );
491 /****************************************************************************
493 ****************************************************************************/
494 static void PacketizeReset( void *p_private, bool b_broken )
496 decoder_t *p_dec = p_private;
497 decoder_sys_t *p_sys = p_dec->p_sys;
502 block_ChainRelease( p_sys->p_frame );
503 p_sys->p_frame = NULL;
504 p_sys->b_frame_sps = false;
505 p_sys->b_frame_pps = false;
506 p_sys->slice.i_frame_type = 0;
507 p_sys->b_slice = false;
509 p_sys->i_frame_pts = VLC_TS_INVALID;
510 p_sys->i_frame_dts = VLC_TS_INVALID;
512 static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t *p_block )
514 decoder_t *p_dec = p_private;
516 /* Remove trailing 0 bytes */
517 while( p_block->i_buffer > 5 && p_block->p_buffer[p_block->i_buffer-1] == 0x00 )
520 return ParseNALBlock( p_dec, pb_ts_used, p_block );
522 static int PacketizeValidate( void *p_private, block_t *p_au )
524 VLC_UNUSED(p_private);
529 static block_t *CreateAnnexbNAL( decoder_t *p_dec, const uint8_t *p, int i_size )
533 p_nal = block_Alloc( 4 + i_size );
534 if( !p_nal ) return NULL;
537 p_nal->p_buffer[0] = 0x00;
538 p_nal->p_buffer[1] = 0x00;
539 p_nal->p_buffer[2] = 0x00;
540 p_nal->p_buffer[3] = 0x01;
543 memcpy( &p_nal->p_buffer[4], p, i_size );
549 static void CreateDecodedNAL( uint8_t **pp_ret, int *pi_ret,
550 const uint8_t *src, int i_src )
552 const uint8_t *end = &src[i_src];
553 uint8_t *dst = malloc( i_src );
558 *pi_ret = nal_decode(src, dst, i_src);
561 /*****************************************************************************
562 * ParseNALBlock: parses annexB type NALs
563 * All p_frag blocks are required to start with 0 0 0 1 4-byte startcode
564 *****************************************************************************/
565 static block_t *ParseNALBlock( decoder_t *p_dec, bool *pb_ts_used, block_t *p_frag )
567 decoder_sys_t *p_sys = p_dec->p_sys;
568 block_t *p_pic = NULL;
570 const int i_nal_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
571 const int i_nal_type = p_frag->p_buffer[4]&0x1f;
572 const mtime_t i_frag_dts = p_frag->i_dts;
573 const mtime_t i_frag_pts = p_frag->i_pts;
575 if( p_sys->b_slice && ( !p_sys->b_sps || !p_sys->b_pps ) )
577 block_ChainRelease( p_sys->p_frame );
578 msg_Warn( p_dec, "waiting for SPS/PPS" );
581 p_sys->slice.i_frame_type = 0;
582 p_sys->p_frame = NULL;
583 p_sys->b_frame_sps = false;
584 p_sys->b_frame_pps = false;
585 p_sys->b_slice = false;
586 cc_Flush( &p_sys->cc_next );
589 if( ( !p_sys->b_sps || !p_sys->b_pps ) &&
590 i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
592 p_sys->b_slice = true;
593 /* Fragment will be discarded later on */
595 else if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
600 ParseSlice( p_dec, &b_new_picture, &slice, i_nal_ref_idc, i_nal_type, p_frag );
603 if( b_new_picture && p_sys->b_slice )
604 p_pic = OutputPicture( p_dec );
607 p_sys->slice = slice;
608 p_sys->b_slice = true;
610 else if( i_nal_type == NAL_SPS )
613 p_pic = OutputPicture( p_dec );
614 p_sys->b_frame_sps = true;
616 PutSPS( p_dec, p_frag );
618 /* Do not append the SPS because we will insert it on keyframes */
621 else if( i_nal_type == NAL_PPS )
624 p_pic = OutputPicture( p_dec );
625 p_sys->b_frame_pps = true;
627 PutPPS( p_dec, p_frag );
629 /* Do not append the PPS because we will insert it on keyframes */
632 else if( i_nal_type == NAL_AU_DELIMITER ||
633 i_nal_type == NAL_SEI ||
634 ( i_nal_type >= 13 && i_nal_type <= 18 ) )
637 p_pic = OutputPicture( p_dec );
639 /* Parse SEI for CC support */
640 if( i_nal_type == NAL_SEI )
642 ParseSei( p_dec, p_frag );
644 else if( i_nal_type == NAL_AU_DELIMITER )
646 if( p_sys->p_frame && (p_sys->p_frame->i_flags & BLOCK_FLAG_PRIVATE_AUD) )
648 block_Release( p_frag );
653 p_frag->i_flags |= BLOCK_FLAG_PRIVATE_AUD;
658 /* Append the block */
660 block_ChainAppend( &p_sys->p_frame, p_frag );
663 if( p_sys->i_frame_dts <= VLC_TS_INVALID &&
664 p_sys->i_frame_pts <= VLC_TS_INVALID )
666 p_sys->i_frame_dts = i_frag_dts;
667 p_sys->i_frame_pts = i_frag_pts;
673 static block_t *OutputPicture( decoder_t *p_dec )
675 decoder_sys_t *p_sys = p_dec->p_sys;
678 if ( !p_sys->b_header && p_sys->i_recovery_frames != -1 )
680 if( p_sys->i_recovery_frames == 0 )
682 msg_Dbg( p_dec, "Recovery from SEI recovery point complete" );
683 p_sys->b_header = true;
685 --p_sys->i_recovery_frames;
688 if( !p_sys->b_header && p_sys->i_recovery_frames == -1 &&
689 p_sys->slice.i_frame_type != BLOCK_FLAG_TYPE_I)
692 const bool b_sps_pps_i = p_sys->slice.i_frame_type == BLOCK_FLAG_TYPE_I &&
695 if( b_sps_pps_i || p_sys->b_frame_sps || p_sys->b_frame_pps )
697 block_t *p_head = NULL;
698 if( p_sys->p_frame->i_flags & BLOCK_FLAG_PRIVATE_AUD )
700 p_head = p_sys->p_frame;
701 p_sys->p_frame = p_sys->p_frame->p_next;
704 block_t *p_list = NULL;
705 for( int i = 0; i < SPS_MAX && (b_sps_pps_i || p_sys->b_frame_sps); i++ )
707 if( p_sys->pp_sps[i] )
708 block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_sps[i] ) );
710 for( int i = 0; i < PPS_MAX && (b_sps_pps_i || p_sys->b_frame_pps); i++ )
712 if( p_sys->pp_pps[i] )
713 block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_pps[i] ) );
715 if( b_sps_pps_i && p_list )
716 p_sys->b_header = true;
719 p_head->p_next = p_list;
722 block_ChainAppend( &p_head, p_sys->p_frame );
724 p_pic = block_ChainGather( p_head );
728 p_pic = block_ChainGather( p_sys->p_frame );
730 p_pic->i_dts = p_sys->i_frame_dts;
731 p_pic->i_pts = p_sys->i_frame_pts;
732 p_pic->i_length = 0; /* FIXME */
733 p_pic->i_flags |= p_sys->slice.i_frame_type;
734 p_pic->i_flags &= ~BLOCK_FLAG_PRIVATE_AUD;
735 if( !p_sys->b_header )
736 p_pic->i_flags |= BLOCK_FLAG_PREROLL;
738 p_sys->slice.i_frame_type = 0;
739 p_sys->p_frame = NULL;
740 p_sys->i_frame_dts = VLC_TS_INVALID;
741 p_sys->i_frame_pts = VLC_TS_INVALID;
742 p_sys->b_frame_sps = false;
743 p_sys->b_frame_pps = false;
744 p_sys->b_slice = false;
747 p_sys->i_cc_pts = p_pic->i_pts;
748 p_sys->i_cc_dts = p_pic->i_dts;
749 p_sys->i_cc_flags = p_pic->i_flags;
751 p_sys->cc = p_sys->cc_next;
752 cc_Flush( &p_sys->cc_next );
757 static void PutSPS( decoder_t *p_dec, block_t *p_frag )
759 decoder_sys_t *p_sys = p_dec->p_sys;
761 uint8_t *pb_dec = NULL;
767 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
768 p_frag->i_buffer - 5 );
770 bs_init( &s, pb_dec, i_dec );
771 int i_profile_idc = bs_read( &s, 8 );
772 p_dec->fmt_out.i_profile = i_profile_idc;
773 /* Skip constraint_set0123, reserved(4) */
774 bs_skip( &s, 1+1+1+1 + 4 );
775 p_dec->fmt_out.i_level = bs_read( &s, 8 );
777 i_sps_id = bs_read_ue( &s );
778 if( i_sps_id >= SPS_MAX || i_sps_id < 0 )
780 msg_Warn( p_dec, "invalid SPS (sps_id=%d)", i_sps_id );
782 block_Release( p_frag );
786 if( i_profile_idc == 100 || i_profile_idc == 110 ||
787 i_profile_idc == 122 || i_profile_idc == 244 ||
788 i_profile_idc == 44 || i_profile_idc == 83 ||
789 i_profile_idc == 86 )
791 /* chroma_format_idc */
792 const int i_chroma_format_idc = bs_read_ue( &s );
793 if( i_chroma_format_idc == 3 )
794 bs_skip( &s, 1 ); /* separate_colour_plane_flag */
795 /* bit_depth_luma_minus8 */
797 /* bit_depth_chroma_minus8 */
799 /* qpprime_y_zero_transform_bypass_flag */
801 /* seq_scaling_matrix_present_flag */
802 i_tmp = bs_read( &s, 1 );
805 for( int i = 0; i < ((3 != i_chroma_format_idc) ? 8 : 12); i++ )
807 /* seq_scaling_list_present_flag[i] */
808 i_tmp = bs_read( &s, 1 );
811 const int i_size_of_scaling_list = (i < 6 ) ? 16 : 64;
812 /* scaling_list (...) */
815 for( int j = 0; j < i_size_of_scaling_list; j++ )
817 if( i_nextscale != 0 )
820 i_tmp = bs_read_se( &s );
821 i_nextscale = ( i_lastscale + i_tmp + 256 ) % 256;
822 /* useDefaultScalingMatrixFlag = ... */
825 i_lastscale = ( i_nextscale == 0 ) ? i_lastscale : i_nextscale;
831 /* Skip i_log2_max_frame_num */
832 p_sys->i_log2_max_frame_num = bs_read_ue( &s );
833 if( p_sys->i_log2_max_frame_num > 12)
834 p_sys->i_log2_max_frame_num = 12;
836 p_sys->i_pic_order_cnt_type = bs_read_ue( &s );
837 if( p_sys->i_pic_order_cnt_type == 0 )
839 /* skip i_log2_max_poc_lsb */
840 p_sys->i_log2_max_pic_order_cnt_lsb = bs_read_ue( &s );
841 if( p_sys->i_log2_max_pic_order_cnt_lsb > 12 )
842 p_sys->i_log2_max_pic_order_cnt_lsb = 12;
844 else if( p_sys->i_pic_order_cnt_type == 1 )
847 /* skip b_delta_pic_order_always_zero */
848 p_sys->i_delta_pic_order_always_zero_flag = bs_read( &s, 1 );
849 /* skip i_offset_for_non_ref_pic */
851 /* skip i_offset_for_top_to_bottom_field */
853 /* read i_num_ref_frames_in_poc_cycle */
854 i_cycle = bs_read_ue( &s );
855 if( i_cycle > 256 ) i_cycle = 256;
858 /* skip i_offset_for_ref_frame */
863 /* i_num_ref_frames */
865 /* b_gaps_in_frame_num_value_allowed */
869 p_dec->fmt_out.video.i_width = 16 * ( bs_read_ue( &s ) + 1 );
870 p_dec->fmt_out.video.i_height = 16 * ( bs_read_ue( &s ) + 1 );
872 /* b_frame_mbs_only */
873 p_sys->b_frame_mbs_only = bs_read( &s, 1 );
874 p_dec->fmt_out.video.i_height *= ( 2 - p_sys->b_frame_mbs_only );
875 if( p_sys->b_frame_mbs_only == 0 )
879 /* b_direct8x8_inference */
883 i_tmp = bs_read( &s, 1 );
897 i_tmp = bs_read( &s, 1 );
900 /* read the aspect ratio part if any */
901 i_tmp = bs_read( &s, 1 );
904 static const struct { int w, h; } sar[17] =
906 { 0, 0 }, { 1, 1 }, { 12, 11 }, { 10, 11 },
907 { 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 },
908 { 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 },
909 { 64, 33 }, { 160,99 }, { 4, 3 }, { 3, 2 },
912 int i_sar = bs_read( &s, 8 );
920 else if( i_sar == 255 )
922 w = bs_read( &s, 16 );
923 h = bs_read( &s, 16 );
931 if( w != 0 && h != 0 )
933 p_dec->fmt_out.video.i_sar_num = w;
934 p_dec->fmt_out.video.i_sar_den = h;
938 p_dec->fmt_out.video.i_sar_num = 1;
939 p_dec->fmt_out.video.i_sar_den = 1;
946 /* We have a new SPS */
948 msg_Dbg( p_dec, "found NAL_SPS (sps_id=%d)", i_sps_id );
951 if( p_sys->pp_sps[i_sps_id] )
952 block_Release( p_sys->pp_sps[i_sps_id] );
953 p_sys->pp_sps[i_sps_id] = p_frag;
956 static void PutPPS( decoder_t *p_dec, block_t *p_frag )
958 decoder_sys_t *p_sys = p_dec->p_sys;
963 bs_init( &s, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
964 i_pps_id = bs_read_ue( &s ); // pps id
965 i_sps_id = bs_read_ue( &s ); // sps id
966 if( i_pps_id >= PPS_MAX || i_sps_id >= SPS_MAX )
968 msg_Warn( p_dec, "invalid PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
969 block_Release( p_frag );
972 bs_skip( &s, 1 ); // entropy coding mode flag
973 p_sys->i_pic_order_present_flag = bs_read( &s, 1 );
976 /* We have a new PPS */
978 msg_Dbg( p_dec, "found NAL_PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
981 if( p_sys->pp_pps[i_pps_id] )
982 block_Release( p_sys->pp_pps[i_pps_id] );
983 p_sys->pp_pps[i_pps_id] = p_frag;
986 static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
987 int i_nal_ref_idc, int i_nal_type, const block_t *p_frag )
989 decoder_sys_t *p_sys = p_dec->p_sys;
996 /* do not convert the whole frame */
997 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
998 __MIN( p_frag->i_buffer - 5, 60 ) );
999 bs_init( &s, pb_dec, i_dec );
1001 /* first_mb_in_slice */
1002 /* int i_first_mb = */ bs_read_ue( &s );
1005 switch( (i_slice_type = bs_read_ue( &s )) )
1008 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
1011 slice.i_frame_type = BLOCK_FLAG_TYPE_B;
1014 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
1016 case 3: case 8: /* SP */
1017 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
1020 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
1023 slice.i_frame_type = 0;
1028 slice.i_nal_type = i_nal_type;
1029 slice.i_nal_ref_idc = i_nal_ref_idc;
1031 slice.i_pic_parameter_set_id = bs_read_ue( &s );
1032 slice.i_frame_num = bs_read( &s, p_sys->i_log2_max_frame_num + 4 );
1034 slice.i_field_pic_flag = 0;
1035 slice.i_bottom_field_flag = -1;
1036 if( !p_sys->b_frame_mbs_only )
1038 /* field_pic_flag */
1039 slice.i_field_pic_flag = bs_read( &s, 1 );
1040 if( slice.i_field_pic_flag )
1041 slice.i_bottom_field_flag = bs_read( &s, 1 );
1044 slice.i_idr_pic_id = p_sys->slice.i_idr_pic_id;
1045 if( slice.i_nal_type == NAL_SLICE_IDR )
1046 slice.i_idr_pic_id = bs_read_ue( &s );
1048 slice.i_pic_order_cnt_lsb = -1;
1049 slice.i_delta_pic_order_cnt_bottom = -1;
1050 slice.i_delta_pic_order_cnt0 = 0;
1051 slice.i_delta_pic_order_cnt1 = 0;
1052 if( p_sys->i_pic_order_cnt_type == 0 )
1054 slice.i_pic_order_cnt_lsb = bs_read( &s, p_sys->i_log2_max_pic_order_cnt_lsb + 4 );
1055 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
1056 slice.i_delta_pic_order_cnt_bottom = bs_read_se( &s );
1058 else if( (p_sys->i_pic_order_cnt_type == 1) &&
1059 (!p_sys->i_delta_pic_order_always_zero_flag) )
1061 slice.i_delta_pic_order_cnt0 = bs_read_se( &s );
1062 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
1063 slice.i_delta_pic_order_cnt1 = bs_read_se( &s );
1067 /* Detection of the first VCL NAL unit of a primary coded picture
1068 * (cf. 7.4.1.2.4) */
1070 if( slice.i_frame_num != p_sys->slice.i_frame_num ||
1071 slice.i_pic_parameter_set_id != p_sys->slice.i_pic_parameter_set_id ||
1072 slice.i_field_pic_flag != p_sys->slice.i_field_pic_flag ||
1073 slice.i_nal_ref_idc != p_sys->slice.i_nal_ref_idc )
1075 if( (slice.i_bottom_field_flag != -1) &&
1076 (p_sys->slice.i_bottom_field_flag != -1) &&
1077 (slice.i_bottom_field_flag != p_sys->slice.i_bottom_field_flag) )
1079 if( p_sys->i_pic_order_cnt_type == 0 &&
1080 ( slice.i_pic_order_cnt_lsb != p_sys->slice.i_pic_order_cnt_lsb ||
1081 slice.i_delta_pic_order_cnt_bottom != p_sys->slice.i_delta_pic_order_cnt_bottom ) )
1083 else if( p_sys->i_pic_order_cnt_type == 1 &&
1084 ( slice.i_delta_pic_order_cnt0 != p_sys->slice.i_delta_pic_order_cnt0 ||
1085 slice.i_delta_pic_order_cnt1 != p_sys->slice.i_delta_pic_order_cnt1 ) )
1087 if( ( slice.i_nal_type == NAL_SLICE_IDR || p_sys->slice.i_nal_type == NAL_SLICE_IDR ) &&
1088 ( slice.i_nal_type != p_sys->slice.i_nal_type || slice.i_idr_pic_id != p_sys->slice.i_idr_pic_id ) )
1092 *pb_new_picture = b_pic;
1096 static void ParseSei( decoder_t *p_dec, block_t *p_frag )
1098 decoder_sys_t *p_sys = p_dec->p_sys;
1103 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
1107 /* The +1 is for rbsp trailing bits */
1108 for( int i_used = 0; i_used+1 < i_dec; )
1112 while( i_used+1 < i_dec )
1114 const int i_byte = pb_dec[i_used++];
1116 if( i_byte != 0xff )
1121 while( i_used+1 < i_dec )
1123 const int i_byte = pb_dec[i_used++];
1125 if( i_byte != 0xff )
1129 if( i_used + i_size + 1 > i_dec )
1132 /* Look for user_data_registered_itu_t_t35 */
1135 static const uint8_t p_dvb1_data_start_code[] = {
1138 0x47, 0x41, 0x39, 0x34
1140 const int i_t35 = i_size;
1141 const uint8_t *p_t35 = &pb_dec[i_used];
1143 /* Check for we have DVB1_data() */
1145 !memcmp( p_t35, p_dvb1_data_start_code, sizeof(p_dvb1_data_start_code) ) )
1147 cc_Extract( &p_sys->cc_next, true, &p_t35[3], i_t35 - 3 );
1151 /* Look for SEI recovery point */
1155 const int i_rec = i_size;
1156 const uint8_t *p_rec = &pb_dec[i_used];
1158 bs_init( &s, p_rec, i_rec );
1159 int i_recovery_frames = bs_read_ue( &s );
1160 //bool b_exact_match = bs_read( &s, 1 );
1161 //bool b_broken_link = bs_read( &s, 1 );
1162 //int i_changing_slice_group = bs_read( &s, 2 );
1163 if( !p_sys->b_header )
1165 msg_Dbg( p_dec, "Seen SEI recovery point, %d recovery frames", i_recovery_frames );
1166 if ( p_sys->i_recovery_frames == -1 || i_recovery_frames < p_sys->i_recovery_frames )
1167 p_sys->i_recovery_frames = i_recovery_frames;