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"
45 /*****************************************************************************
47 *****************************************************************************/
48 static int Open ( vlc_object_t * );
49 static void Close( vlc_object_t * );
52 set_category( CAT_SOUT )
53 set_subcategory( SUBCAT_SOUT_PACKETIZER )
54 set_description( N_("H.264 video packetizer") )
55 set_capability( "packetizer", 50 )
56 set_callbacks( Open, Close )
60 /****************************************************************************
62 ****************************************************************************/
63 static block_t *Packetize( decoder_t *, block_t ** );
64 static block_t *PacketizeAVC1( decoder_t *, block_t ** );
65 static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] );
73 int i_pic_parameter_set_id;
77 int i_bottom_field_flag;
81 int i_pic_order_cnt_lsb;
82 int i_delta_pic_order_cnt_bottom;
84 int i_delta_pic_order_cnt0;
85 int i_delta_pic_order_cnt1;
92 block_bytestream_t bytestream;
104 block_t *pp_sps[SPS_MAX];
105 block_t *pp_pps[PPS_MAX];
108 int i_avcC_length_size;
110 /* Useful values of the Sequence Parameter Set */
111 int i_log2_max_frame_num;
112 int b_frame_mbs_only;
113 int i_pic_order_cnt_type;
114 int i_delta_pic_order_always_zero_flag;
115 int i_log2_max_pic_order_cnt_lsb;
117 /* Value from Picture Parameter Set */
118 int i_pic_order_present_flag;
120 /* Useful values of the Slice Header */
149 NAL_SLICE_IDR = 5, /* ref_idc != 0 */
150 NAL_SEI = 6, /* ref_idc == 0 */
154 /* ref_idc == 0 for 6,9,10,11,12 */
159 NAL_PRIORITY_DISPOSABLE = 0,
160 NAL_PRIORITY_LOW = 1,
161 NAL_PRIORITY_HIGH = 2,
162 NAL_PRIORITY_HIGHEST = 3,
165 static block_t *ParseNALBlock( decoder_t *, bool *pb_used_ts, block_t * );
167 static block_t *CreateAnnexbNAL( decoder_t *, const uint8_t *p, int );
169 static block_t *OutputPicture( decoder_t *p_dec );
170 static void PutSPS( decoder_t *p_dec, block_t *p_frag );
171 static void PutPPS( decoder_t *p_dec, block_t *p_frag );
172 static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
173 int i_nal_ref_idc, int i_nal_type, const block_t *p_frag );
174 static void ParseSei( decoder_t *, block_t * );
177 /*****************************************************************************
178 * Open: probe the packetizer and return score
179 * When opening after demux, the packetizer is only loaded AFTER the decoder
180 * That means that what you set in fmt_out is ignored by the decoder in this special case
181 *****************************************************************************/
182 static int Open( vlc_object_t *p_this )
184 decoder_t *p_dec = (decoder_t*)p_this;
185 decoder_sys_t *p_sys;
188 if( p_dec->fmt_in.i_codec != VLC_FOURCC( 'h', '2', '6', '4') &&
189 p_dec->fmt_in.i_codec != VLC_FOURCC( 'H', '2', '6', '4') &&
190 p_dec->fmt_in.i_codec != VLC_FOURCC( 'V', 'S', 'S', 'H') &&
191 p_dec->fmt_in.i_codec != VLC_FOURCC( 'v', 's', 's', 'h') &&
192 p_dec->fmt_in.i_codec != VLC_FOURCC( 'D', 'A', 'V', 'C') &&
193 p_dec->fmt_in.i_codec != VLC_FOURCC( 'x', '2', '6', '4') &&
194 p_dec->fmt_in.i_codec != VLC_FOURCC( 'X', '2', '6', '4') &&
195 ( p_dec->fmt_in.i_codec != VLC_FOURCC( 'a', 'v', 'c', '1') ||
196 p_dec->fmt_in.i_extra < 7 ) )
201 /* Allocate the memory needed to store the decoder's structure */
202 if( ( p_dec->p_sys = p_sys = malloc( sizeof(decoder_sys_t) ) ) == NULL )
206 p_sys->i_state = STATE_NOSYNC;
208 p_sys->startcode[0] = 0;
209 p_sys->startcode[1] = 0;
210 p_sys->startcode[2] = 0;
211 p_sys->startcode[3] = 1;
212 p_sys->bytestream = block_BytestreamInit();
213 p_sys->b_slice = false;
214 p_sys->p_frame = NULL;
215 p_sys->b_header= false;
216 p_sys->b_sps = false;
217 p_sys->b_pps = false;
218 for( i = 0; i < SPS_MAX; i++ )
219 p_sys->pp_sps[i] = NULL;
220 for( i = 0; i < PPS_MAX; i++ )
221 p_sys->pp_pps[i] = NULL;
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 = -1;
235 p_sys->i_frame_pts = -1;
237 /* Setup properties */
238 es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
239 p_dec->fmt_out.i_codec = VLC_FOURCC( 'h', '2', '6', '4' );
241 if( p_dec->fmt_in.i_codec == 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;
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 )
362 block_t *p_init = block_New( p_dec, p_dec->fmt_in.i_extra );
365 memcpy( p_init->p_buffer, p_dec->fmt_in.p_extra,
366 p_dec->fmt_in.i_extra );
368 while( ( p_pic = Packetize( p_dec, &p_init ) ) )
370 /* Should not occur because we should only receive SPS/PPS */
371 block_Release( p_pic );
379 /*****************************************************************************
380 * Close: clean up the packetizer
381 *****************************************************************************/
382 static void Close( vlc_object_t *p_this )
384 decoder_t *p_dec = (decoder_t*)p_this;
385 decoder_sys_t *p_sys = p_dec->p_sys;
389 block_ChainRelease( p_sys->p_frame );
390 for( i = 0; i < SPS_MAX; i++ )
392 if( p_sys->pp_sps[i] )
393 block_Release( p_sys->pp_sps[i] );
395 for( i = 0; i < PPS_MAX; i++ )
397 if( p_sys->pp_pps[i] )
398 block_Release( p_sys->pp_pps[i] );
400 block_BytestreamRelease( &p_sys->bytestream );
401 if( p_dec->pf_get_cc )
403 cc_Exit( &p_sys->cc_next );
404 cc_Exit( &p_sys->cc );
410 /****************************************************************************
411 * Packetize: the whole thing
412 * Search for the startcodes 3 or more bytes
413 * Feed ParseNALBlock ALWAYS with 4 byte startcode prepended NALs
414 ****************************************************************************/
415 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
417 decoder_sys_t *p_sys = p_dec->p_sys;
420 if( !pp_block || !*pp_block )
423 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
425 if( (*pp_block)->i_flags&BLOCK_FLAG_CORRUPTED )
427 p_sys->i_state = STATE_NOSYNC;
428 block_BytestreamEmpty( &p_sys->bytestream );
431 block_ChainRelease( p_sys->p_frame );
432 p_sys->p_frame = NULL;
433 p_sys->slice.i_frame_type = 0;
434 p_sys->b_slice = false;
436 p_sys->i_frame_pts = -1;
437 p_sys->i_frame_dts = -1;
439 block_Release( *pp_block );
443 block_BytestreamPush( &p_sys->bytestream, *pp_block );
449 switch( p_sys->i_state )
452 /* Skip until 3 byte startcode 0 0 1 */
453 if( block_FindStartcodeFromOffset( &p_sys->bytestream,
454 &p_sys->i_offset, p_sys->startcode+1, 3 ) == VLC_SUCCESS)
456 p_sys->i_state = STATE_NEXT_SYNC;
459 if( p_sys->i_offset )
462 block_SkipBytes( &p_sys->bytestream, p_sys->i_offset );
464 block_BytestreamFlush( &p_sys->bytestream );
467 if( p_sys->i_state != STATE_NEXT_SYNC )
473 p_sys->i_offset = 1; /* To find next startcode */
475 case STATE_NEXT_SYNC:
476 /* Find the next 3 byte startcode 0 0 1*/
477 if( block_FindStartcodeFromOffset( &p_sys->bytestream,
478 &p_sys->i_offset, p_sys->startcode+1, 3 ) != VLC_SUCCESS)
483 block_BytestreamFlush( &p_sys->bytestream );
485 /* Get the new fragment and set the pts/dts */
486 block_t *p_block_bytestream = p_sys->bytestream.p_block;
488 p_pic = block_New( p_dec, p_sys->i_offset +1 );
489 p_pic->i_pts = p_block_bytestream->i_pts;
490 p_pic->i_dts = p_block_bytestream->i_dts;
492 /* Force 4 byte startcode 0 0 0 1 */
493 p_pic->p_buffer[0] = 0;
495 block_GetBytes( &p_sys->bytestream, &p_pic->p_buffer[1],
498 /* Remove trailing 0 bytes */
499 while( p_pic->i_buffer && (!p_pic->p_buffer[p_pic->i_buffer-1] ) )
504 p_pic = ParseNALBlock( p_dec, &b_used_ts, p_pic );
507 p_block_bytestream->i_dts = -1;
508 p_block_bytestream->i_pts = -1;
513 p_sys->i_state = STATE_NOSYNC;
517 msg_Dbg( p_dec, "pts=%"PRId64" dts=%"PRId64,
518 p_pic->i_pts, p_pic->i_dts );
521 /* So p_block doesn't get re-added several times */
522 *pp_block = block_BytestreamPop( &p_sys->bytestream );
524 p_sys->i_state = STATE_NOSYNC;
531 /****************************************************************************
532 * PacketizeAVC1: Takes VCL blocks of data and creates annexe B type NAL stream
533 * Will always use 4 byte 0 0 0 1 startcodes
534 * Will prepend a SPS and PPS before each keyframe
535 ****************************************************************************/
536 static block_t *PacketizeAVC1( decoder_t *p_dec, block_t **pp_block )
538 decoder_sys_t *p_sys = p_dec->p_sys;
540 block_t *p_ret = NULL;
543 if( !pp_block || !*pp_block )
545 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
547 block_Release( *pp_block );
554 for( p = p_block->p_buffer; p < &p_block->p_buffer[p_block->i_buffer]; )
561 for( i = 0; i < p_sys->i_avcC_length_size; i++ )
563 i_size = (i_size << 8) | (*p++);
567 i_size > ( p_block->p_buffer + p_block->i_buffer - p ) )
569 msg_Err( p_dec, "Broken frame : size %d is too big", i_size );
573 block_t *p_part = CreateAnnexbNAL( p_dec, p, i_size );
577 p_part->i_dts = p_block->i_dts;
578 p_part->i_pts = p_block->i_pts;
581 if( ( p_pic = ParseNALBlock( p_dec, &b_dummy, p_part ) ) )
583 block_ChainAppend( &p_ret, p_pic );
587 block_Release( p_block );
592 /*****************************************************************************
594 *****************************************************************************/
595 static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] )
597 decoder_sys_t *p_sys = p_dec->p_sys;
600 for( int i = 0; i < 4; i++ )
601 pb_present[i] = p_sys->cc.pb_present[i];
603 if( p_sys->cc.i_data <= 0 )
606 p_cc = block_New( p_dec, p_sys->cc.i_data);
609 memcpy( p_cc->p_buffer, p_sys->cc.p_data, p_sys->cc.i_data );
611 p_cc->i_pts = p_sys->cc.b_reorder ? p_sys->i_cc_pts : p_sys->i_cc_dts;
612 p_cc->i_flags = ( p_sys->cc.b_reorder ? p_sys->i_cc_flags : BLOCK_FLAG_TYPE_P ) & BLOCK_FLAG_TYPE_MASK;
614 cc_Flush( &p_sys->cc );
618 /****************************************************************************
620 ****************************************************************************/
621 static block_t *CreateAnnexbNAL( decoder_t *p_dec, const uint8_t *p, int i_size )
625 p_nal = block_New( p_dec, 4 + i_size );
626 if( !p_nal ) return NULL;
629 p_nal->p_buffer[0] = 0x00;
630 p_nal->p_buffer[1] = 0x00;
631 p_nal->p_buffer[2] = 0x00;
632 p_nal->p_buffer[3] = 0x01;
635 memcpy( &p_nal->p_buffer[4], p, i_size );
641 static void CreateDecodedNAL( uint8_t **pp_ret, int *pi_ret,
642 const uint8_t *src, int i_src )
644 const uint8_t *end = &src[i_src];
645 uint8_t *dst = malloc( i_src );
653 if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
665 *pi_ret = dst - *pp_ret;
668 static inline int bs_read_ue( bs_t *s )
672 while( bs_read1( s ) == 0 && s->p < s->p_end && i < 32 )
676 return( ( 1 << i) - 1 + bs_read( s, i ) );
679 static inline int bs_read_se( bs_t *s )
681 int val = bs_read_ue( s );
683 return val&0x01 ? (val+1)/2 : -(val/2);
686 /*****************************************************************************
687 * ParseNALBlock: parses annexB type NALs
688 * All p_frag blocks are required to start with 0 0 0 1 4-byte startcode
689 *****************************************************************************/
690 static block_t *ParseNALBlock( decoder_t *p_dec, bool *pb_used_ts, block_t *p_frag )
692 decoder_sys_t *p_sys = p_dec->p_sys;
693 block_t *p_pic = NULL;
695 const int i_nal_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
696 const int i_nal_type = p_frag->p_buffer[4]&0x1f;
697 const mtime_t i_frag_dts = p_frag->i_dts;
698 const mtime_t i_frag_pts = p_frag->i_pts;
700 if( p_sys->b_slice && ( !p_sys->b_sps || !p_sys->b_pps ) )
702 block_ChainRelease( p_sys->p_frame );
703 msg_Warn( p_dec, "waiting for SPS/PPS" );
706 p_sys->slice.i_frame_type = 0;
707 p_sys->p_frame = NULL;
708 p_sys->b_slice = false;
709 cc_Flush( &p_sys->cc_next );
712 if( ( !p_sys->b_sps || !p_sys->b_pps ) &&
713 i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
715 p_sys->b_slice = true;
716 /* Fragment will be discarded later on */
718 else if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
723 ParseSlice( p_dec, &b_new_picture, &slice, i_nal_ref_idc, i_nal_type, p_frag );
726 if( b_new_picture && p_sys->b_slice )
727 p_pic = OutputPicture( p_dec );
730 p_sys->slice = slice;
731 p_sys->b_slice = true;
733 else if( i_nal_type == NAL_SPS )
736 p_pic = OutputPicture( p_dec );
738 PutSPS( p_dec, p_frag );
740 /* Do not append the SPS because we will insert it on keyframes */
743 else if( i_nal_type == NAL_PPS )
746 p_pic = OutputPicture( p_dec );
748 PutPPS( p_dec, p_frag );
750 /* Do not append the PPS because we will insert it on keyframes */
753 else if( i_nal_type == NAL_AU_DELIMITER ||
754 i_nal_type == NAL_SEI ||
755 ( i_nal_type >= 13 && i_nal_type <= 18 ) )
758 p_pic = OutputPicture( p_dec );
760 /* Parse SEI for CC support */
761 if( i_nal_type == NAL_SEI )
762 ParseSei( p_dec, p_frag );
765 /* Append the block */
767 block_ChainAppend( &p_sys->p_frame, p_frag );
770 if( p_sys->i_frame_dts < 0 && p_sys->i_frame_pts < 0 )
772 p_sys->i_frame_dts = i_frag_dts;
773 p_sys->i_frame_pts = i_frag_pts;
779 static block_t *OutputPicture( decoder_t *p_dec )
781 decoder_sys_t *p_sys = p_dec->p_sys;
784 if( !p_sys->b_header && p_sys->slice.i_frame_type != BLOCK_FLAG_TYPE_I)
787 if( p_sys->slice.i_frame_type == BLOCK_FLAG_TYPE_I && p_sys->b_sps && p_sys->b_pps )
789 block_t *p_list = NULL;
792 for( i = 0; i < SPS_MAX; i++ )
794 if( p_sys->pp_sps[i] )
795 block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_sps[i] ) );
797 for( i = 0; i < PPS_MAX; i++ )
799 if( p_sys->pp_pps[i] )
800 block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_pps[i] ) );
803 p_sys->b_header = true;
805 block_ChainAppend( &p_list, p_sys->p_frame );
806 p_pic = block_ChainGather( p_list );
810 p_pic = block_ChainGather( p_sys->p_frame );
812 p_pic->i_dts = p_sys->i_frame_dts;
813 p_pic->i_pts = p_sys->i_frame_pts;
814 p_pic->i_length = 0; /* FIXME */
815 p_pic->i_flags |= p_sys->slice.i_frame_type;
817 p_sys->slice.i_frame_type = 0;
818 p_sys->p_frame = NULL;
819 p_sys->i_frame_dts = -1;
820 p_sys->i_frame_pts = -1;
821 p_sys->b_slice = false;
824 p_sys->i_cc_pts = p_pic->i_pts;
825 p_sys->i_cc_dts = p_pic->i_dts;
826 p_sys->i_cc_flags = p_pic->i_flags;
829 cc_data_t cc_tmp = p_sys->cc;
830 p_sys->cc = p_sys->cc_next;
831 p_sys->cc_next = cc_tmp;
833 cc_Flush( &p_sys->cc_next );
838 static void PutSPS( decoder_t *p_dec, block_t *p_frag )
840 decoder_sys_t *p_sys = p_dec->p_sys;
842 uint8_t *pb_dec = NULL;
848 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
849 p_frag->i_buffer - 5 );
851 bs_init( &s, pb_dec, i_dec );
852 int i_profile_idc = bs_read( &s, 8 );
853 /* Skip constraint_set0123, reserved(4), level(8) */
854 bs_skip( &s, 1+1+1+1 + 4 + 8 );
856 i_sps_id = bs_read_ue( &s );
857 if( i_sps_id >= SPS_MAX )
859 msg_Warn( p_dec, "invalid SPS (sps_id=%d)", i_sps_id );
861 block_Release( p_frag );
865 if( i_profile_idc == 100 || i_profile_idc == 110 ||
866 i_profile_idc == 122 || i_profile_idc == 244 ||
867 i_profile_idc == 44 || i_profile_idc == 83 ||
868 i_profile_idc == 86 )
870 /* chroma_format_idc */
871 const int i_chroma_format_idc = bs_read_ue( &s );
872 if( i_chroma_format_idc == 3 )
873 bs_skip( &s, 1 ); /* seperate_colour_plane_flag */
874 /* bit_depth_luma_minus8 */
876 /* bit_depth_chroma_minus8 */
878 /* qpprime_y_zero_transform_bypass_flag */
880 /* seq_scaling_matrix_present_flag */
881 i_tmp = bs_read( &s, 1 );
884 for( int i = 0; i < ((3 != i_chroma_format_idc) ? 8 : 12); i++ )
886 /* seq_scaling_list_present_flag[i] */
887 i_tmp = bs_read( &s, 1 );
890 const int i_size_of_scaling_list = (i < 6 ) ? 16 : 64;
891 /* scaling_list (...) */
894 for( int j = 0; j < i_size_of_scaling_list; j++ )
896 if( i_nextscale != 0 )
899 i_tmp = bs_read( &s, 1 );
900 i_nextscale = ( i_lastscale + i_tmp + 256 ) % 256;
901 /* useDefaultScalingMatrixFlag = ... */
904 i_lastscale = ( i_nextscale == 0 ) ? i_lastscale : i_nextscale;
910 /* Skip i_log2_max_frame_num */
911 p_sys->i_log2_max_frame_num = bs_read_ue( &s );
912 if( p_sys->i_log2_max_frame_num > 12)
913 p_sys->i_log2_max_frame_num = 12;
915 p_sys->i_pic_order_cnt_type = bs_read_ue( &s );
916 if( p_sys->i_pic_order_cnt_type == 0 )
918 /* skip i_log2_max_poc_lsb */
919 p_sys->i_log2_max_pic_order_cnt_lsb = bs_read_ue( &s );
920 if( p_sys->i_log2_max_pic_order_cnt_lsb > 12 )
921 p_sys->i_log2_max_pic_order_cnt_lsb = 12;
923 else if( p_sys->i_pic_order_cnt_type == 1 )
926 /* skip b_delta_pic_order_always_zero */
927 p_sys->i_delta_pic_order_always_zero_flag = bs_read( &s, 1 );
928 /* skip i_offset_for_non_ref_pic */
930 /* skip i_offset_for_top_to_bottom_field */
932 /* read i_num_ref_frames_in_poc_cycle */
933 i_cycle = bs_read_ue( &s );
934 if( i_cycle > 256 ) i_cycle = 256;
937 /* skip i_offset_for_ref_frame */
942 /* i_num_ref_frames */
944 /* b_gaps_in_frame_num_value_allowed */
948 p_dec->fmt_out.video.i_width = 16 * ( bs_read_ue( &s ) + 1 );
949 p_dec->fmt_out.video.i_height = 16 * ( bs_read_ue( &s ) + 1 );
951 /* b_frame_mbs_only */
952 p_sys->b_frame_mbs_only = bs_read( &s, 1 );
953 if( p_sys->b_frame_mbs_only == 0 )
957 /* b_direct8x8_inference */
961 i_tmp = bs_read( &s, 1 );
975 i_tmp = bs_read( &s, 1 );
978 /* read the aspect ratio part if any */
979 i_tmp = bs_read( &s, 1 );
982 static const struct { int w, h; } sar[17] =
984 { 0, 0 }, { 1, 1 }, { 12, 11 }, { 10, 11 },
985 { 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 },
986 { 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 },
987 { 64, 33 }, { 160,99 }, { 4, 3 }, { 3, 2 },
990 int i_sar = bs_read( &s, 8 );
998 else if( i_sar == 255 )
1000 w = bs_read( &s, 16 );
1001 h = bs_read( &s, 16 );
1010 p_dec->fmt_out.video.i_aspect = (int64_t)VOUT_ASPECT_FACTOR *
1011 ( w * p_dec->fmt_out.video.i_width ) /
1012 ( h * p_dec->fmt_out.video.i_height);
1014 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR;
1020 /* We have a new SPS */
1022 msg_Dbg( p_dec, "found NAL_SPS (sps_id=%d)", i_sps_id );
1023 p_sys->b_sps = true;
1025 if( p_sys->pp_sps[i_sps_id] )
1026 block_Release( p_sys->pp_sps[i_sps_id] );
1027 p_sys->pp_sps[i_sps_id] = p_frag;
1030 static void PutPPS( decoder_t *p_dec, block_t *p_frag )
1032 decoder_sys_t *p_sys = p_dec->p_sys;
1037 bs_init( &s, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
1038 i_pps_id = bs_read_ue( &s ); // pps id
1039 i_sps_id = bs_read_ue( &s ); // sps id
1040 if( i_pps_id >= PPS_MAX || i_sps_id >= SPS_MAX )
1042 msg_Warn( p_dec, "invalid PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
1043 block_Release( p_frag );
1046 bs_skip( &s, 1 ); // entropy coding mode flag
1047 p_sys->i_pic_order_present_flag = bs_read( &s, 1 );
1050 /* We have a new PPS */
1052 msg_Dbg( p_dec, "found NAL_PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
1053 p_sys->b_pps = true;
1055 if( p_sys->pp_pps[i_pps_id] )
1056 block_Release( p_sys->pp_pps[i_pps_id] );
1057 p_sys->pp_pps[i_pps_id] = p_frag;
1060 static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
1061 int i_nal_ref_idc, int i_nal_type, const block_t *p_frag )
1063 decoder_sys_t *p_sys = p_dec->p_sys;
1066 int i_first_mb, i_slice_type;
1070 /* do not convert the whole frame */
1071 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
1072 __MIN( p_frag->i_buffer - 5, 60 ) );
1073 bs_init( &s, pb_dec, i_dec );
1075 /* first_mb_in_slice */
1076 i_first_mb = bs_read_ue( &s );
1079 switch( (i_slice_type = bs_read_ue( &s )) )
1082 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
1085 slice.i_frame_type = BLOCK_FLAG_TYPE_B;
1088 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
1090 case 3: case 8: /* SP */
1091 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
1094 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
1097 slice.i_frame_type = 0;
1102 slice.i_nal_type = i_nal_type;
1103 slice.i_nal_ref_idc = i_nal_ref_idc;
1105 slice.i_pic_parameter_set_id = bs_read_ue( &s );
1106 slice.i_frame_num = bs_read( &s, p_sys->i_log2_max_frame_num + 4 );
1108 slice.i_field_pic_flag = 0;
1109 slice.i_bottom_field_flag = -1;
1110 if( !p_sys->b_frame_mbs_only )
1112 /* field_pic_flag */
1113 slice.i_field_pic_flag = bs_read( &s, 1 );
1114 if( slice.i_field_pic_flag )
1115 slice.i_bottom_field_flag = bs_read( &s, 1 );
1118 slice.i_idr_pic_id = p_sys->slice.i_idr_pic_id;
1119 if( slice.i_nal_type == NAL_SLICE_IDR )
1120 slice.i_idr_pic_id = bs_read_ue( &s );
1122 slice.i_pic_order_cnt_lsb = -1;
1123 slice.i_delta_pic_order_cnt_bottom = -1;
1124 slice.i_delta_pic_order_cnt0 = 0;
1125 slice.i_delta_pic_order_cnt1 = 0;
1126 if( p_sys->i_pic_order_cnt_type == 0 )
1128 slice.i_pic_order_cnt_lsb = bs_read( &s, p_sys->i_log2_max_pic_order_cnt_lsb + 4 );
1129 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
1130 slice.i_delta_pic_order_cnt_bottom = bs_read_se( &s );
1132 else if( (p_sys->i_pic_order_cnt_type == 1) &&
1133 (!p_sys->i_delta_pic_order_always_zero_flag) )
1135 slice.i_delta_pic_order_cnt0 = bs_read_se( &s );
1136 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
1137 slice.i_delta_pic_order_cnt1 = bs_read_se( &s );
1141 /* Detection of the first VCL NAL unit of a primary coded picture
1142 * (cf. 7.4.1.2.4) */
1144 if( slice.i_frame_num != p_sys->slice.i_frame_num ||
1145 slice.i_pic_parameter_set_id != p_sys->slice.i_pic_parameter_set_id ||
1146 slice.i_field_pic_flag != p_sys->slice.i_field_pic_flag ||
1147 slice.i_nal_ref_idc != p_sys->slice.i_nal_ref_idc )
1149 if( (slice.i_bottom_field_flag != -1) &&
1150 (p_sys->slice.i_bottom_field_flag != -1) &&
1151 (slice.i_bottom_field_flag != p_sys->slice.i_bottom_field_flag) )
1153 if( p_sys->i_pic_order_cnt_type == 0 &&
1154 ( slice.i_pic_order_cnt_lsb != p_sys->slice.i_pic_order_cnt_lsb ||
1155 slice.i_delta_pic_order_cnt_bottom != p_sys->slice.i_delta_pic_order_cnt_bottom ) )
1157 else if( p_sys->i_pic_order_cnt_type == 1 &&
1158 ( slice.i_delta_pic_order_cnt0 != p_sys->slice.i_delta_pic_order_cnt0 ||
1159 slice.i_delta_pic_order_cnt1 != p_sys->slice.i_delta_pic_order_cnt1 ) )
1161 if( ( slice.i_nal_type == NAL_SLICE_IDR || p_sys->slice.i_nal_type == NAL_SLICE_IDR ) &&
1162 ( slice.i_nal_type != p_sys->slice.i_nal_type || slice.i_idr_pic_id != p_sys->slice.i_idr_pic_id ) )
1166 *pb_new_picture = b_pic;
1170 static void ParseSei( decoder_t *p_dec, block_t *p_frag )
1172 decoder_sys_t *p_sys = p_dec->p_sys;
1177 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
1181 /* The +1 is for rbsp trailing bits */
1182 for( int i_used = 0; i_used+1 < i_dec; )
1186 while( i_used+1 < i_dec )
1188 const int i_byte = pb_dec[i_used++];
1190 if( i_byte != 0xff )
1195 while( i_used+1 < i_dec )
1197 const int i_byte = pb_dec[i_used++];
1199 if( i_byte != 0xff )
1203 if( i_used + i_size + 1 > i_dec )
1206 /* Look for user_data_registered_itu_t_t35 */
1209 static const uint8_t p_dvb1_data_start_code[] = {
1212 0x47, 0x41, 0x39, 0x34
1214 const int i_t35 = i_size;
1215 const uint8_t *p_t35 = &pb_dec[i_used];
1217 /* Check for we have DVB1_data() */
1219 !memcmp( p_t35, p_dvb1_data_start_code, sizeof(p_dvb1_data_start_code) ) )
1221 cc_Extract( &p_sys->cc_next, &p_t35[3], i_t35 - 3 );