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"
44 /*****************************************************************************
46 *****************************************************************************/
47 static int Open ( vlc_object_t * );
48 static void Close( vlc_object_t * );
51 set_category( CAT_SOUT );
52 set_subcategory( SUBCAT_SOUT_PACKETIZER );
53 set_description( N_("H.264 video packetizer") );
54 set_capability( "packetizer", 50 );
55 set_callbacks( Open, Close );
59 /****************************************************************************
61 ****************************************************************************/
62 static block_t *Packetize( decoder_t *, block_t ** );
63 static block_t *PacketizeAVC1( decoder_t *, block_t ** );
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;
90 block_bytestream_t bytestream;
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 */
139 NAL_SLICE_IDR = 5, /* ref_idc != 0 */
140 NAL_SEI = 6, /* ref_idc == 0 */
144 /* ref_idc == 0 for 6,9,10,11,12 */
149 NAL_PRIORITY_DISPOSABLE = 0,
150 NAL_PRIORITY_LOW = 1,
151 NAL_PRIORITY_HIGH = 2,
152 NAL_PRIORITY_HIGHEST = 3,
155 static block_t *ParseNALBlock( decoder_t *, bool *pb_used_ts, block_t * );
157 static block_t *CreateAnnexbNAL( decoder_t *, const uint8_t *p, int );
159 static block_t *OutputPicture( decoder_t *p_dec );
160 static void PutSPS( decoder_t *p_dec, block_t *p_frag );
161 static void PutPPS( decoder_t *p_dec, block_t *p_frag );
162 static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
163 int i_nal_ref_idc, int i_nal_type, const block_t *p_frag );
166 /*****************************************************************************
167 * Open: probe the packetizer and return score
168 * When opening after demux, the packetizer is only loaded AFTER the decoder
169 * That means that what you set in fmt_out is ignored by the decoder in this special case
170 *****************************************************************************/
171 static int Open( vlc_object_t *p_this )
173 decoder_t *p_dec = (decoder_t*)p_this;
174 decoder_sys_t *p_sys;
177 if( p_dec->fmt_in.i_codec != VLC_FOURCC( 'h', '2', '6', '4') &&
178 p_dec->fmt_in.i_codec != VLC_FOURCC( 'H', '2', '6', '4') &&
179 p_dec->fmt_in.i_codec != VLC_FOURCC( 'V', 'S', 'S', 'H') &&
180 p_dec->fmt_in.i_codec != VLC_FOURCC( 'v', 's', 's', 'h') &&
181 p_dec->fmt_in.i_codec != VLC_FOURCC( 'D', 'A', 'V', 'C') &&
182 ( p_dec->fmt_in.i_codec != VLC_FOURCC( 'a', 'v', 'c', '1') ||
183 p_dec->fmt_in.i_extra < 7 ) )
188 /* Allocate the memory needed to store the decoder's structure */
189 if( ( p_dec->p_sys = p_sys = malloc( sizeof(decoder_sys_t) ) ) == NULL )
193 p_sys->i_state = STATE_NOSYNC;
195 p_sys->startcode[0] = 0;
196 p_sys->startcode[1] = 0;
197 p_sys->startcode[2] = 0;
198 p_sys->startcode[3] = 1;
199 p_sys->bytestream = block_BytestreamInit();
200 p_sys->b_slice = false;
201 p_sys->p_frame = NULL;
202 p_sys->b_header= false;
203 p_sys->b_sps = false;
204 p_sys->b_pps = false;
205 for( i = 0; i < SPS_MAX; i++ )
206 p_sys->pp_sps[i] = NULL;
207 for( i = 0; i < PPS_MAX; i++ )
208 p_sys->pp_pps[i] = NULL;
210 p_sys->slice.i_nal_type = -1;
211 p_sys->slice.i_nal_ref_idc = -1;
212 p_sys->slice.i_idr_pic_id = -1;
213 p_sys->slice.i_frame_num = -1;
214 p_sys->slice.i_frame_type = 0;
215 p_sys->slice.i_pic_parameter_set_id = -1;
216 p_sys->slice.i_field_pic_flag = 0;
217 p_sys->slice.i_bottom_field_flag = -1;
218 p_sys->slice.i_pic_order_cnt_lsb = -1;
219 p_sys->slice.i_delta_pic_order_cnt_bottom = -1;
221 p_sys->i_frame_dts = -1;
222 p_sys->i_frame_pts = -1;
224 /* Setup properties */
225 es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
226 p_dec->fmt_out.i_codec = VLC_FOURCC( 'h', '2', '6', '4' );
228 if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'a', 'v', 'c', '1' ) )
230 /* This type of stream is produced by mp4 and matroska
231 * when we want to store it in another streamformat, you need to convert
232 * The fmt_in.p_extra should ALWAYS contain the avcC
233 * The fmt_out.p_extra should contain all the SPS and PPS with 4 byte startcodes */
234 uint8_t *p = &((uint8_t*)p_dec->fmt_in.p_extra)[4];
240 p_sys->i_avcC_length_size = 1 + ((*p++)&0x03);
244 for( i = 0; i < i_sps; i++ )
246 uint16_t i_length = GetWBE( p ); p += 2;
248 (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
252 block_t *p_sps = CreateAnnexbNAL( p_dec, p, i_length );
255 ParseNALBlock( p_dec, &b_dummy, p_sps );
260 for( i = 0; i < i_pps; i++ )
262 uint16_t i_length = GetWBE( p ); p += 2;
264 (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
268 block_t *p_pps = CreateAnnexbNAL( p_dec, p, i_length );
271 ParseNALBlock( p_dec, &b_dummy, p_pps );
274 msg_Dbg( p_dec, "avcC length size=%d, sps=%d, pps=%d",
275 p_sys->i_avcC_length_size, i_sps, i_pps );
277 if( !p_sys->b_sps || !p_sys->b_pps )
280 /* FIXME: FFMPEG isn't happy at all if you leave this */
281 if( p_dec->fmt_out.i_extra > 0 )
282 free( p_dec->fmt_out.p_extra );
283 p_dec->fmt_out.i_extra = 0;
284 p_dec->fmt_out.p_extra = NULL;
286 /* Set the new extradata */
287 for( i = 0; i < SPS_MAX; i++ )
289 if( p_sys->pp_sps[i] )
290 p_dec->fmt_out.i_extra += p_sys->pp_sps[i]->i_buffer;
292 for( i = 0; i < PPS_MAX; i++ )
294 if( p_sys->pp_pps[i] )
295 p_dec->fmt_out.i_extra += p_sys->pp_pps[i]->i_buffer;
297 p_dec->fmt_out.p_extra = malloc( p_dec->fmt_out.i_extra );
298 if( p_dec->fmt_out.p_extra )
300 uint8_t *p_dst = p_dec->fmt_out.p_extra;
302 for( i = 0; i < SPS_MAX; i++ )
304 if( p_sys->pp_sps[i] )
306 memcpy( p_dst, p_sys->pp_sps[i]->p_buffer, p_sys->pp_sps[i]->i_buffer );
307 p_dst += p_sys->pp_sps[i]->i_buffer;
310 for( i = 0; i < PPS_MAX; i++ )
312 if( p_sys->pp_pps[i] )
314 memcpy( p_dst, p_sys->pp_pps[i]->p_buffer, p_sys->pp_pps[i]->i_buffer );
315 p_dst += p_sys->pp_pps[i]->i_buffer;
318 p_sys->b_header = true;
322 p_dec->fmt_out.i_extra = 0;
326 p_dec->pf_packetize = PacketizeAVC1;
330 /* This type of stream contains data with 3 of 4 byte startcodes
331 * The fmt_in.p_extra MAY contain SPS/PPS with 4 byte startcodes
332 * The fmt_out.p_extra should be the same */
335 p_dec->pf_packetize = Packetize;
338 if( p_dec->fmt_in.i_extra > 0 )
340 block_t *p_init = block_New( p_dec, p_dec->fmt_in.i_extra );
343 memcpy( p_init->p_buffer, p_dec->fmt_in.p_extra,
344 p_dec->fmt_in.i_extra );
346 while( ( p_pic = Packetize( p_dec, &p_init ) ) )
348 /* Should not occur because we should only receive SPS/PPS */
349 block_Release( p_pic );
357 /*****************************************************************************
358 * Close: clean up the packetizer
359 *****************************************************************************/
360 static void Close( vlc_object_t *p_this )
362 decoder_t *p_dec = (decoder_t*)p_this;
363 decoder_sys_t *p_sys = p_dec->p_sys;
366 if( p_sys->p_frame ) block_ChainRelease( p_sys->p_frame );
367 for( i = 0; i < SPS_MAX; i++ )
369 if( p_sys->pp_sps[i] )
370 block_Release( p_sys->pp_sps[i] );
372 for( i = 0; i < PPS_MAX; i++ )
374 if( p_sys->pp_pps[i] )
375 block_Release( p_sys->pp_pps[i] );
377 block_BytestreamRelease( &p_sys->bytestream );
381 /****************************************************************************
382 * Packetize: the whole thing
383 * Search for the startcodes 3 or more bytes
384 * Feed ParseNALBlock ALWAYS with 4 byte startcode prepended NALs
385 ****************************************************************************/
386 static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
388 decoder_sys_t *p_sys = p_dec->p_sys;
391 if( !pp_block || !*pp_block )
394 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
396 if( (*pp_block)->i_flags&BLOCK_FLAG_CORRUPTED )
398 p_sys->i_state = STATE_NOSYNC;
399 block_BytestreamFlush( &p_sys->bytestream );
402 block_ChainRelease( p_sys->p_frame );
403 p_sys->p_frame = NULL;
404 p_sys->slice.i_frame_type = 0;
405 p_sys->b_slice = false;
407 block_Release( *pp_block );
411 block_BytestreamPush( &p_sys->bytestream, *pp_block );
417 switch( p_sys->i_state )
420 /* Skip until 3 byte startcode 0 0 1 */
421 if( block_FindStartcodeFromOffset( &p_sys->bytestream,
422 &p_sys->i_offset, p_sys->startcode+1, 3 ) == VLC_SUCCESS)
424 p_sys->i_state = STATE_NEXT_SYNC;
427 if( p_sys->i_offset )
430 block_SkipBytes( &p_sys->bytestream, p_sys->i_offset );
432 block_BytestreamFlush( &p_sys->bytestream );
435 if( p_sys->i_state != STATE_NEXT_SYNC )
441 p_sys->i_offset = 1; /* To find next startcode */
443 case STATE_NEXT_SYNC:
444 /* Find the next 3 byte startcode 0 0 1*/
445 if( block_FindStartcodeFromOffset( &p_sys->bytestream,
446 &p_sys->i_offset, p_sys->startcode+1, 3 ) != VLC_SUCCESS)
451 block_BytestreamFlush( &p_sys->bytestream );
453 /* Get the new fragment and set the pts/dts */
454 block_t *p_block_bytestream = p_sys->bytestream.p_block;
456 p_pic = block_New( p_dec, p_sys->i_offset +1 );
457 p_pic->i_pts = p_block_bytestream->i_pts;
458 p_pic->i_dts = p_block_bytestream->i_dts;
460 /* Force 4 byte startcode 0 0 0 1 */
461 p_pic->p_buffer[0] = 0;
463 block_GetBytes( &p_sys->bytestream, &p_pic->p_buffer[1],
466 /* Remove trailing 0 bytes */
467 while( p_pic->i_buffer && (!p_pic->p_buffer[p_pic->i_buffer-1] ) )
472 p_pic = ParseNALBlock( p_dec, &b_used_ts, p_pic );
475 p_block_bytestream->i_dts = -1;
476 p_block_bytestream->i_pts = -1;
481 p_sys->i_state = STATE_NOSYNC;
485 msg_Dbg( p_dec, "pts=%"PRId64" dts=%"PRId64,
486 p_pic->i_pts, p_pic->i_dts );
489 /* So p_block doesn't get re-added several times */
490 *pp_block = block_BytestreamPop( &p_sys->bytestream );
492 p_sys->i_state = STATE_NOSYNC;
499 /****************************************************************************
500 * PacketizeAVC1: Takes VCL blocks of data and creates annexe B type NAL stream
501 * Will always use 4 byte 0 0 0 1 startcodes
502 * Will prepend a SPS and PPS before each keyframe
503 ****************************************************************************/
504 static block_t *PacketizeAVC1( decoder_t *p_dec, block_t **pp_block )
506 decoder_sys_t *p_sys = p_dec->p_sys;
508 block_t *p_ret = NULL;
511 if( !pp_block || !*pp_block )
513 if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
515 block_Release( *pp_block );
522 for( p = p_block->p_buffer; p < &p_block->p_buffer[p_block->i_buffer]; )
529 for( i = 0; i < p_sys->i_avcC_length_size; i++ )
531 i_size = (i_size << 8) | (*p++);
535 i_size > ( p_block->p_buffer + p_block->i_buffer - p ) )
537 msg_Err( p_dec, "Broken frame : size %d is too big", i_size );
541 block_t *p_part = CreateAnnexbNAL( p_dec, p, i_size );
545 p_part->i_dts = p_block->i_dts;
546 p_part->i_pts = p_block->i_pts;
549 if( ( p_pic = ParseNALBlock( p_dec, &b_dummy, p_part ) ) )
551 block_ChainAppend( &p_ret, p_pic );
555 block_Release( p_block );
560 /****************************************************************************
562 ****************************************************************************/
563 static block_t *CreateAnnexbNAL( decoder_t *p_dec, const uint8_t *p, int i_size )
567 p_nal = block_New( p_dec, 4 + i_size );
568 if( !p_nal ) return NULL;
571 p_nal->p_buffer[0] = 0x00;
572 p_nal->p_buffer[1] = 0x00;
573 p_nal->p_buffer[2] = 0x00;
574 p_nal->p_buffer[3] = 0x01;
577 memcpy( &p_nal->p_buffer[4], p, i_size );
583 static void CreateDecodedNAL( uint8_t **pp_ret, int *pi_ret,
584 const uint8_t *src, int i_src )
586 const uint8_t *end = &src[i_src];
587 uint8_t *dst = malloc( i_src );
595 if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
607 *pi_ret = dst - *pp_ret;
610 static inline int bs_read_ue( bs_t *s )
614 while( bs_read1( s ) == 0 && s->p < s->p_end && i < 32 )
618 return( ( 1 << i) - 1 + bs_read( s, i ) );
621 static inline int bs_read_se( bs_t *s )
623 int val = bs_read_ue( s );
625 return val&0x01 ? (val+1)/2 : -(val/2);
628 /*****************************************************************************
629 * ParseNALBlock: parses annexB type NALs
630 * All p_frag blocks are required to start with 0 0 0 1 4-byte startcode
631 *****************************************************************************/
632 static block_t *ParseNALBlock( decoder_t *p_dec, bool *pb_used_ts, block_t *p_frag )
634 decoder_sys_t *p_sys = p_dec->p_sys;
635 block_t *p_pic = NULL;
637 const int i_nal_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
638 const int i_nal_type = p_frag->p_buffer[4]&0x1f;
639 const mtime_t i_frag_dts = p_frag->i_dts;
640 const mtime_t i_frag_pts = p_frag->i_pts;
642 if( p_sys->b_slice && ( !p_sys->b_sps || !p_sys->b_pps ) )
644 block_ChainRelease( p_sys->p_frame );
645 msg_Warn( p_dec, "waiting for SPS/PPS" );
648 p_sys->slice.i_frame_type = 0;
649 p_sys->p_frame = NULL;
650 p_sys->b_slice = false;
653 if( ( !p_sys->b_sps || !p_sys->b_pps ) &&
654 i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
656 p_sys->b_slice = true;
657 /* Fragment will be discarded later on */
659 else if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
664 ParseSlice( p_dec, &b_new_picture, &slice, i_nal_ref_idc, i_nal_type, p_frag );
667 if( b_new_picture && p_sys->b_slice )
668 p_pic = OutputPicture( p_dec );
671 p_sys->slice = slice;
672 p_sys->b_slice = true;
674 else if( i_nal_type == NAL_SPS )
677 p_pic = OutputPicture( p_dec );
679 PutSPS( p_dec, p_frag );
681 /* Do not append the SPS because we will insert it on keyframes */
684 else if( i_nal_type == NAL_PPS )
687 p_pic = OutputPicture( p_dec );
689 PutPPS( p_dec, p_frag );
691 /* Do not append the PPS because we will insert it on keyframes */
694 else if( i_nal_type == NAL_AU_DELIMITER ||
695 i_nal_type == NAL_SEI ||
696 ( i_nal_type >= 13 && i_nal_type <= 18 ) )
699 p_pic = OutputPicture( p_dec );
701 /* TODO parse SEI for CC support */
704 /* Append the block */
706 block_ChainAppend( &p_sys->p_frame, p_frag );
709 if( p_sys->i_frame_dts < 0 && p_sys->i_frame_pts < 0 )
711 p_sys->i_frame_dts = i_frag_dts;
712 p_sys->i_frame_pts = i_frag_pts;
718 static block_t *OutputPicture( decoder_t *p_dec )
720 decoder_sys_t *p_sys = p_dec->p_sys;
723 if( !p_sys->b_header && p_sys->slice.i_frame_type != BLOCK_FLAG_TYPE_I)
726 if( p_sys->slice.i_frame_type == BLOCK_FLAG_TYPE_I && p_sys->b_sps && p_sys->b_pps )
728 block_t *p_list = NULL;
731 for( i = 0; i < SPS_MAX; i++ )
733 if( p_sys->pp_sps[i] )
734 block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_sps[i] ) );
736 for( i = 0; i < PPS_MAX; i++ )
738 if( p_sys->pp_pps[i] )
739 block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_pps[i] ) );
742 p_sys->b_header = true;
744 block_ChainAppend( &p_list, p_sys->p_frame );
745 p_pic = block_ChainGather( p_list );
749 p_pic = block_ChainGather( p_sys->p_frame );
751 p_pic->i_dts = p_sys->i_frame_dts;
752 p_pic->i_pts = p_sys->i_frame_pts;
753 p_pic->i_length = 0; /* FIXME */
754 p_pic->i_flags |= p_sys->slice.i_frame_type;
756 p_sys->slice.i_frame_type = 0;
757 p_sys->p_frame = NULL;
758 p_sys->i_frame_dts = -1;
759 p_sys->i_frame_pts = -1;
760 p_sys->b_slice = false;
765 static void PutSPS( decoder_t *p_dec, block_t *p_frag )
767 decoder_sys_t *p_sys = p_dec->p_sys;
769 uint8_t *pb_dec = NULL;
775 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
776 p_frag->i_buffer - 5 );
778 bs_init( &s, pb_dec, i_dec );
779 /* Skip profile(8), constraint_set012, reserver(5), level(8) */
780 bs_skip( &s, 8 + 1+1+1 + 5 + 8 );
782 i_sps_id = bs_read_ue( &s );
783 if( i_sps_id >= SPS_MAX )
785 msg_Warn( p_dec, "invalid SPS (sps_id=%d)", i_sps_id );
787 block_Release( p_frag );
791 /* Skip i_log2_max_frame_num */
792 p_sys->i_log2_max_frame_num = bs_read_ue( &s );
793 if( p_sys->i_log2_max_frame_num > 12)
794 p_sys->i_log2_max_frame_num = 12;
796 p_sys->i_pic_order_cnt_type = bs_read_ue( &s );
797 if( p_sys->i_pic_order_cnt_type == 0 )
799 /* skip i_log2_max_poc_lsb */
800 p_sys->i_log2_max_pic_order_cnt_lsb = bs_read_ue( &s );
801 if( p_sys->i_log2_max_pic_order_cnt_lsb > 12 )
802 p_sys->i_log2_max_pic_order_cnt_lsb = 12;
804 else if( p_sys->i_pic_order_cnt_type == 1 )
807 /* skip b_delta_pic_order_always_zero */
808 p_sys->i_delta_pic_order_always_zero_flag = bs_read( &s, 1 );
809 /* skip i_offset_for_non_ref_pic */
811 /* skip i_offset_for_top_to_bottom_field */
813 /* read i_num_ref_frames_in_poc_cycle */
814 i_cycle = bs_read_ue( &s );
815 if( i_cycle > 256 ) i_cycle = 256;
818 /* skip i_offset_for_ref_frame */
823 /* i_num_ref_frames */
825 /* b_gaps_in_frame_num_value_allowed */
829 p_dec->fmt_out.video.i_width = 16 * ( bs_read_ue( &s ) + 1 );
830 p_dec->fmt_out.video.i_height = 16 * ( bs_read_ue( &s ) + 1 );
832 /* b_frame_mbs_only */
833 p_sys->b_frame_mbs_only = bs_read( &s, 1 );
834 if( p_sys->b_frame_mbs_only == 0 )
838 /* b_direct8x8_inference */
842 i_tmp = bs_read( &s, 1 );
856 i_tmp = bs_read( &s, 1 );
859 /* read the aspect ratio part if any FIXME check it */
860 i_tmp = bs_read( &s, 1 );
863 static const struct { int w, h; } sar[17] =
865 { 0, 0 }, { 1, 1 }, { 12, 11 }, { 10, 11 },
866 { 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 },
867 { 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 },
868 { 64, 33 }, { 160,99 }, { 4, 3 }, { 3, 2 },
871 int i_sar = bs_read( &s, 8 );
879 else if( i_sar == 255 )
881 w = bs_read( &s, 16 );
882 h = bs_read( &s, 16 );
890 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR *
891 ( w * p_dec->fmt_out.video.i_width ) /
892 ( h * p_dec->fmt_out.video.i_height);
894 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR;
900 /* We have a new SPS */
902 msg_Dbg( p_dec, "found NAL_SPS (sps_id=%d)", i_sps_id );
905 if( p_sys->pp_sps[i_sps_id] )
906 block_Release( p_sys->pp_sps[i_sps_id] );
907 p_sys->pp_sps[i_sps_id] = p_frag;
910 static void PutPPS( decoder_t *p_dec, block_t *p_frag )
912 decoder_sys_t *p_sys = p_dec->p_sys;
917 bs_init( &s, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
918 i_pps_id = bs_read_ue( &s ); // pps id
919 i_sps_id = bs_read_ue( &s ); // sps id
920 if( i_pps_id >= PPS_MAX || i_sps_id >= SPS_MAX )
922 msg_Warn( p_dec, "invalid PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
923 block_Release( p_frag );
926 bs_skip( &s, 1 ); // entropy coding mode flag
927 p_sys->i_pic_order_present_flag = bs_read( &s, 1 );
930 /* We have a new PPS */
932 msg_Dbg( p_dec, "found NAL_PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
935 if( p_sys->pp_pps[i_pps_id] )
936 block_Release( p_sys->pp_pps[i_pps_id] );
937 p_sys->pp_pps[i_pps_id] = p_frag;
940 static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
941 int i_nal_ref_idc, int i_nal_type, const block_t *p_frag )
943 decoder_sys_t *p_sys = p_dec->p_sys;
946 int i_first_mb, i_slice_type;
950 /* do not convert the whole frame */
951 CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
952 __MIN( p_frag->i_buffer - 5, 60 ) );
953 bs_init( &s, pb_dec, i_dec );
955 /* first_mb_in_slice */
956 i_first_mb = bs_read_ue( &s );
959 switch( (i_slice_type = bs_read_ue( &s )) )
962 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
965 slice.i_frame_type = BLOCK_FLAG_TYPE_B;
968 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
970 case 3: case 8: /* SP */
971 slice.i_frame_type = BLOCK_FLAG_TYPE_P;
974 slice.i_frame_type = BLOCK_FLAG_TYPE_I;
977 slice.i_frame_type = 0;
982 slice.i_nal_type = i_nal_type;
983 slice.i_nal_ref_idc = i_nal_ref_idc;
985 slice.i_pic_parameter_set_id = bs_read_ue( &s );
986 slice.i_frame_num = bs_read( &s, p_sys->i_log2_max_frame_num + 4 );
988 slice.i_field_pic_flag = 0;
989 slice.i_bottom_field_flag = -1;
990 if( !p_sys->b_frame_mbs_only )
993 slice.i_field_pic_flag = bs_read( &s, 1 );
994 if( slice.i_field_pic_flag )
995 slice.i_bottom_field_flag = bs_read( &s, 1 );
998 slice.i_idr_pic_id = p_sys->slice.i_idr_pic_id;
999 if( slice.i_nal_type == NAL_SLICE_IDR )
1000 slice.i_idr_pic_id = bs_read_ue( &s );
1002 slice.i_pic_order_cnt_lsb = -1;
1003 slice.i_delta_pic_order_cnt_bottom = -1;
1004 slice.i_delta_pic_order_cnt0 = 0;
1005 slice.i_delta_pic_order_cnt1 = 0;
1006 if( p_sys->i_pic_order_cnt_type == 0 )
1008 slice.i_pic_order_cnt_lsb = bs_read( &s, p_sys->i_log2_max_pic_order_cnt_lsb + 4 );
1009 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
1010 slice.i_delta_pic_order_cnt_bottom = bs_read_se( &s );
1012 else if( (p_sys->i_pic_order_cnt_type == 1) &&
1013 (!p_sys->i_delta_pic_order_always_zero_flag) )
1015 slice.i_delta_pic_order_cnt0 = bs_read_se( &s );
1016 if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
1017 slice.i_delta_pic_order_cnt1 = bs_read_se( &s );
1021 /* Detection of the first VCL NAL unit of a primary coded picture
1022 * (cf. 7.4.1.2.4) */
1024 if( slice.i_frame_num != p_sys->slice.i_frame_num ||
1025 slice.i_pic_parameter_set_id != p_sys->slice.i_pic_parameter_set_id ||
1026 slice.i_field_pic_flag != p_sys->slice.i_field_pic_flag ||
1027 slice.i_nal_ref_idc != p_sys->slice.i_nal_ref_idc )
1029 if( (slice.i_bottom_field_flag != -1) &&
1030 (p_sys->slice.i_bottom_field_flag != -1) &&
1031 (slice.i_bottom_field_flag != p_sys->slice.i_bottom_field_flag) )
1033 if( p_sys->i_pic_order_cnt_type == 0 &&
1034 ( slice.i_pic_order_cnt_lsb != p_sys->slice.i_pic_order_cnt_lsb ||
1035 slice.i_delta_pic_order_cnt_bottom != p_sys->slice.i_delta_pic_order_cnt_bottom ) )
1037 else if( p_sys->i_pic_order_cnt_type == 1 &&
1038 ( slice.i_delta_pic_order_cnt0 != p_sys->slice.i_delta_pic_order_cnt0 ||
1039 slice.i_delta_pic_order_cnt1 != p_sys->slice.i_delta_pic_order_cnt1 ) )
1041 if( ( slice.i_nal_type == NAL_SLICE_IDR || p_sys->slice.i_nal_type == NAL_SLICE_IDR ) &&
1042 ( slice.i_nal_type != p_sys->slice.i_nal_type || slice.i_idr_pic_id != p_sys->slice.i_idr_pic_id ) )
1046 *pb_new_picture = b_pic;