h264.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:34k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * h264.c: h264/avc video packetizer
- *****************************************************************************
- * Copyright (C) 2001, 2002, 2006 the VideoLAN team
- * $Id: 534ee7bcbe6f58954dea56a0eba722a09b851456 $
- *
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- * Eric Petit <titer@videolan.org>
- * Gildas Bazin <gbazin@videolan.org>
- * Derk-Jan Hartman <hartman at videolan dot org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include <vlc_plugin.h>
- #include <vlc_sout.h>
- #include <vlc_codec.h>
- #include <vlc_block.h>
- #include "vlc_block_helper.h"
- #include "vlc_bits.h"
- #include "../codec/cc.h"
- #include "packetizer_helper.h"
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Open ( vlc_object_t * );
- static void Close( vlc_object_t * );
- vlc_module_begin ()
- set_category( CAT_SOUT )
- set_subcategory( SUBCAT_SOUT_PACKETIZER )
- set_description( N_("H.264 video packetizer") )
- set_capability( "packetizer", 50 )
- set_callbacks( Open, Close )
- vlc_module_end ()
- /****************************************************************************
- * Local prototypes
- ****************************************************************************/
- typedef struct
- {
- int i_nal_type;
- int i_nal_ref_idc;
- int i_frame_type;
- int i_pic_parameter_set_id;
- int i_frame_num;
- int i_field_pic_flag;
- int i_bottom_field_flag;
- int i_idr_pic_id;
- int i_pic_order_cnt_lsb;
- int i_delta_pic_order_cnt_bottom;
- int i_delta_pic_order_cnt0;
- int i_delta_pic_order_cnt1;
- } slice_t;
- #define SPS_MAX (32)
- #define PPS_MAX (256)
- struct decoder_sys_t
- {
- /* */
- packetizer_t packetizer;
- /* */
- bool b_slice;
- block_t *p_frame;
- bool b_header;
- bool b_sps;
- bool b_pps;
- block_t *pp_sps[SPS_MAX];
- block_t *pp_pps[PPS_MAX];
- /* avcC data */
- int i_avcC_length_size;
- /* Useful values of the Sequence Parameter Set */
- int i_log2_max_frame_num;
- int b_frame_mbs_only;
- int i_pic_order_cnt_type;
- int i_delta_pic_order_always_zero_flag;
- int i_log2_max_pic_order_cnt_lsb;
- /* Value from Picture Parameter Set */
- int i_pic_order_present_flag;
- /* Useful values of the Slice Header */
- slice_t slice;
- /* */
- mtime_t i_frame_pts;
- mtime_t i_frame_dts;
- /* */
- uint32_t i_cc_flags;
- mtime_t i_cc_pts;
- mtime_t i_cc_dts;
- cc_data_t cc;
- cc_data_t cc_next;
- };
- enum nal_unit_type_e
- {
- NAL_UNKNOWN = 0,
- NAL_SLICE = 1,
- NAL_SLICE_DPA = 2,
- NAL_SLICE_DPB = 3,
- NAL_SLICE_DPC = 4,
- NAL_SLICE_IDR = 5, /* ref_idc != 0 */
- NAL_SEI = 6, /* ref_idc == 0 */
- NAL_SPS = 7,
- NAL_PPS = 8,
- NAL_AU_DELIMITER= 9
- /* ref_idc == 0 for 6,9,10,11,12 */
- };
- enum nal_priority_e
- {
- NAL_PRIORITY_DISPOSABLE = 0,
- NAL_PRIORITY_LOW = 1,
- NAL_PRIORITY_HIGH = 2,
- NAL_PRIORITY_HIGHEST = 3,
- };
- static block_t *Packetize( decoder_t *, block_t ** );
- static block_t *PacketizeAVC1( decoder_t *, block_t ** );
- static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] );
- static void PacketizeReset( void *p_private, bool b_broken );
- static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t * );
- static int PacketizeValidate( void *p_private, block_t * );
- static block_t *ParseNALBlock( decoder_t *, bool *pb_used_ts, block_t * );
- static block_t *CreateAnnexbNAL( decoder_t *, const uint8_t *p, int );
- static block_t *OutputPicture( decoder_t *p_dec );
- static void PutSPS( decoder_t *p_dec, block_t *p_frag );
- static void PutPPS( decoder_t *p_dec, block_t *p_frag );
- static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
- int i_nal_ref_idc, int i_nal_type, const block_t *p_frag );
- static void ParseSei( decoder_t *, block_t * );
- static const uint8_t p_h264_startcode[3] = { 0x00, 0x00, 0x01 };
- /*****************************************************************************
- * Open: probe the packetizer and return score
- * When opening after demux, the packetizer is only loaded AFTER the decoder
- * That means that what you set in fmt_out is ignored by the decoder in this special case
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- {
- decoder_t *p_dec = (decoder_t*)p_this;
- decoder_sys_t *p_sys;
- int i;
- if( p_dec->fmt_in.i_codec != VLC_FOURCC( 'h', '2', '6', '4') &&
- p_dec->fmt_in.i_codec != VLC_FOURCC( 'H', '2', '6', '4') &&
- p_dec->fmt_in.i_codec != VLC_FOURCC( 'V', 'S', 'S', 'H') &&
- p_dec->fmt_in.i_codec != VLC_FOURCC( 'v', 's', 's', 'h') &&
- p_dec->fmt_in.i_codec != VLC_FOURCC( 'D', 'A', 'V', 'C') &&
- p_dec->fmt_in.i_codec != VLC_FOURCC( 'x', '2', '6', '4') &&
- p_dec->fmt_in.i_codec != VLC_FOURCC( 'X', '2', '6', '4') &&
- ( p_dec->fmt_in.i_codec != VLC_FOURCC( 'a', 'v', 'c', '1') ||
- p_dec->fmt_in.i_extra < 7 ) )
- {
- return VLC_EGENERIC;
- }
- /* Allocate the memory needed to store the decoder's structure */
- if( ( p_dec->p_sys = p_sys = malloc( sizeof(decoder_sys_t) ) ) == NULL )
- {
- return VLC_ENOMEM;
- }
- packetizer_Init( &p_sys->packetizer,
- p_h264_startcode, sizeof(p_h264_startcode),
- p_h264_startcode, 1,
- PacketizeReset, PacketizeParse, PacketizeValidate, p_dec );
- p_sys->b_slice = false;
- p_sys->p_frame = NULL;
- p_sys->b_header= false;
- p_sys->b_sps = false;
- p_sys->b_pps = false;
- for( i = 0; i < SPS_MAX; i++ )
- p_sys->pp_sps[i] = NULL;
- for( i = 0; i < PPS_MAX; i++ )
- p_sys->pp_pps[i] = NULL;
- p_sys->slice.i_nal_type = -1;
- p_sys->slice.i_nal_ref_idc = -1;
- p_sys->slice.i_idr_pic_id = -1;
- p_sys->slice.i_frame_num = -1;
- p_sys->slice.i_frame_type = 0;
- p_sys->slice.i_pic_parameter_set_id = -1;
- p_sys->slice.i_field_pic_flag = 0;
- p_sys->slice.i_bottom_field_flag = -1;
- p_sys->slice.i_pic_order_cnt_lsb = -1;
- p_sys->slice.i_delta_pic_order_cnt_bottom = -1;
- p_sys->i_frame_dts = -1;
- p_sys->i_frame_pts = -1;
- /* Setup properties */
- es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
- p_dec->fmt_out.i_codec = VLC_FOURCC( 'h', '2', '6', '4' );
- if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'a', 'v', 'c', '1' ) )
- {
- /* This type of stream is produced by mp4 and matroska
- * when we want to store it in another streamformat, you need to convert
- * The fmt_in.p_extra should ALWAYS contain the avcC
- * The fmt_out.p_extra should contain all the SPS and PPS with 4 byte startcodes */
- uint8_t *p = &((uint8_t*)p_dec->fmt_in.p_extra)[4];
- int i_sps, i_pps;
- bool b_dummy;
- int i;
- /* Parse avcC */
- p_sys->i_avcC_length_size = 1 + ((*p++)&0x03);
- /* Read SPS */
- i_sps = (*p++)&0x1f;
- for( i = 0; i < i_sps; i++ )
- {
- uint16_t i_length = GetWBE( p ); p += 2;
- if( i_length >
- (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
- {
- return VLC_EGENERIC;
- }
- block_t *p_sps = CreateAnnexbNAL( p_dec, p, i_length );
- if( !p_sps )
- return VLC_EGENERIC;
- ParseNALBlock( p_dec, &b_dummy, p_sps );
- p += i_length;
- }
- /* Read PPS */
- i_pps = *p++;
- for( i = 0; i < i_pps; i++ )
- {
- uint16_t i_length = GetWBE( p ); p += 2;
- if( i_length >
- (uint8_t*)p_dec->fmt_in.p_extra + p_dec->fmt_in.i_extra - p )
- {
- return VLC_EGENERIC;
- }
- block_t *p_pps = CreateAnnexbNAL( p_dec, p, i_length );
- if( !p_pps )
- return VLC_EGENERIC;
- ParseNALBlock( p_dec, &b_dummy, p_pps );
- p += i_length;
- }
- msg_Dbg( p_dec, "avcC length size=%d, sps=%d, pps=%d",
- p_sys->i_avcC_length_size, i_sps, i_pps );
- if( !p_sys->b_sps || !p_sys->b_pps )
- return VLC_EGENERIC;
- /* FIXME: FFMPEG isn't happy at all if you leave this */
- if( p_dec->fmt_out.i_extra > 0 )
- free( p_dec->fmt_out.p_extra );
- p_dec->fmt_out.i_extra = 0;
- p_dec->fmt_out.p_extra = NULL;
- /* Set the new extradata */
- for( i = 0; i < SPS_MAX; i++ )
- {
- if( p_sys->pp_sps[i] )
- p_dec->fmt_out.i_extra += p_sys->pp_sps[i]->i_buffer;
- }
- for( i = 0; i < PPS_MAX; i++ )
- {
- if( p_sys->pp_pps[i] )
- p_dec->fmt_out.i_extra += p_sys->pp_pps[i]->i_buffer;
- }
- p_dec->fmt_out.p_extra = malloc( p_dec->fmt_out.i_extra );
- if( p_dec->fmt_out.p_extra )
- {
- uint8_t *p_dst = p_dec->fmt_out.p_extra;
- for( i = 0; i < SPS_MAX; i++ )
- {
- if( p_sys->pp_sps[i] )
- {
- memcpy( p_dst, p_sys->pp_sps[i]->p_buffer, p_sys->pp_sps[i]->i_buffer );
- p_dst += p_sys->pp_sps[i]->i_buffer;
- }
- }
- for( i = 0; i < PPS_MAX; i++ )
- {
- if( p_sys->pp_pps[i] )
- {
- memcpy( p_dst, p_sys->pp_pps[i]->p_buffer, p_sys->pp_pps[i]->i_buffer );
- p_dst += p_sys->pp_pps[i]->i_buffer;
- }
- }
- p_sys->b_header = true;
- }
- else
- {
- p_dec->fmt_out.i_extra = 0;
- }
- /* Set callback */
- p_dec->pf_packetize = PacketizeAVC1;
- /* TODO CC ? */
- }
- else
- {
- /* This type of stream contains data with 3 of 4 byte startcodes
- * The fmt_in.p_extra MAY contain SPS/PPS with 4 byte startcodes
- * The fmt_out.p_extra should be the same */
- /* Set callback */
- p_dec->pf_packetize = Packetize;
- p_dec->pf_get_cc = GetCc;
- /* */
- p_sys->i_cc_pts = 0;
- p_sys->i_cc_dts = 0;
- p_sys->i_cc_flags = 0;
- cc_Init( &p_sys->cc );
- cc_Init( &p_sys->cc_next );
- /* */
- if( p_dec->fmt_in.i_extra > 0 )
- packetizer_Header( &p_sys->packetizer,
- p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Close: clean up the packetizer
- *****************************************************************************/
- static void Close( vlc_object_t *p_this )
- {
- decoder_t *p_dec = (decoder_t*)p_this;
- decoder_sys_t *p_sys = p_dec->p_sys;
- int i;
- if( p_sys->p_frame )
- block_ChainRelease( p_sys->p_frame );
- for( i = 0; i < SPS_MAX; i++ )
- {
- if( p_sys->pp_sps[i] )
- block_Release( p_sys->pp_sps[i] );
- }
- for( i = 0; i < PPS_MAX; i++ )
- {
- if( p_sys->pp_pps[i] )
- block_Release( p_sys->pp_pps[i] );
- }
- packetizer_Clean( &p_sys->packetizer );
- if( p_dec->pf_get_cc )
- {
- cc_Exit( &p_sys->cc_next );
- cc_Exit( &p_sys->cc );
- }
- free( p_sys );
- }
- /****************************************************************************
- * Packetize: the whole thing
- * Search for the startcodes 3 or more bytes
- * Feed ParseNALBlock ALWAYS with 4 byte startcode prepended NALs
- ****************************************************************************/
- static block_t *Packetize( decoder_t *p_dec, block_t **pp_block )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- return packetizer_Packetize( &p_sys->packetizer, pp_block );
- }
- /****************************************************************************
- * PacketizeAVC1: Takes VCL blocks of data and creates annexe B type NAL stream
- * Will always use 4 byte 0 0 0 1 startcodes
- * Will prepend a SPS and PPS before each keyframe
- ****************************************************************************/
- static block_t *PacketizeAVC1( decoder_t *p_dec, block_t **pp_block )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- block_t *p_block;
- block_t *p_ret = NULL;
- uint8_t *p;
- if( !pp_block || !*pp_block )
- return NULL;
- if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
- {
- block_Release( *pp_block );
- return NULL;
- }
- p_block = *pp_block;
- *pp_block = NULL;
- for( p = p_block->p_buffer; p < &p_block->p_buffer[p_block->i_buffer]; )
- {
- block_t *p_pic;
- bool b_dummy;
- int i_size = 0;
- int i;
- for( i = 0; i < p_sys->i_avcC_length_size; i++ )
- {
- i_size = (i_size << 8) | (*p++);
- }
- if( i_size <= 0 ||
- i_size > ( p_block->p_buffer + p_block->i_buffer - p ) )
- {
- msg_Err( p_dec, "Broken frame : size %d is too big", i_size );
- break;
- }
- block_t *p_part = CreateAnnexbNAL( p_dec, p, i_size );
- if( !p_part )
- break;
- p_part->i_dts = p_block->i_dts;
- p_part->i_pts = p_block->i_pts;
- /* Parse the NAL */
- if( ( p_pic = ParseNALBlock( p_dec, &b_dummy, p_part ) ) )
- {
- block_ChainAppend( &p_ret, p_pic );
- }
- p += i_size;
- }
- block_Release( p_block );
- return p_ret;
- }
- /*****************************************************************************
- * GetCc:
- *****************************************************************************/
- static block_t *GetCc( decoder_t *p_dec, bool pb_present[4] )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- block_t *p_cc;
- for( int i = 0; i < 4; i++ )
- pb_present[i] = p_sys->cc.pb_present[i];
- if( p_sys->cc.i_data <= 0 )
- return NULL;
- p_cc = block_New( p_dec, p_sys->cc.i_data);
- if( p_cc )
- {
- memcpy( p_cc->p_buffer, p_sys->cc.p_data, p_sys->cc.i_data );
- p_cc->i_dts =
- p_cc->i_pts = p_sys->cc.b_reorder ? p_sys->i_cc_pts : p_sys->i_cc_dts;
- p_cc->i_flags = ( p_sys->cc.b_reorder ? p_sys->i_cc_flags : BLOCK_FLAG_TYPE_P ) & BLOCK_FLAG_TYPE_MASK;
- }
- cc_Flush( &p_sys->cc );
- return p_cc;
- }
- /****************************************************************************
- * Helpers
- ****************************************************************************/
- static void PacketizeReset( void *p_private, bool b_broken )
- {
- decoder_t *p_dec = p_private;
- decoder_sys_t *p_sys = p_dec->p_sys;
- if( b_broken )
- {
- if( p_sys->p_frame )
- block_ChainRelease( p_sys->p_frame );
- p_sys->p_frame = NULL;
- p_sys->slice.i_frame_type = 0;
- p_sys->b_slice = false;
- }
- p_sys->i_frame_pts = -1;
- p_sys->i_frame_dts = -1;
- }
- static block_t *PacketizeParse( void *p_private, bool *pb_ts_used, block_t *p_block )
- {
- decoder_t *p_dec = p_private;
- /* Remove trailing 0 bytes */
- while( p_block->i_buffer && p_block->p_buffer[p_block->i_buffer-1] == 0x00 )
- p_block->i_buffer--;
- return ParseNALBlock( p_dec, pb_ts_used, p_block );
- }
- static int PacketizeValidate( void *p_private, block_t *p_au )
- {
- VLC_UNUSED(p_private);
- VLC_UNUSED(p_au);
- return VLC_SUCCESS;
- }
- static block_t *CreateAnnexbNAL( decoder_t *p_dec, const uint8_t *p, int i_size )
- {
- block_t *p_nal;
- p_nal = block_New( p_dec, 4 + i_size );
- if( !p_nal ) return NULL;
- /* Add start code */
- p_nal->p_buffer[0] = 0x00;
- p_nal->p_buffer[1] = 0x00;
- p_nal->p_buffer[2] = 0x00;
- p_nal->p_buffer[3] = 0x01;
- /* Copy nalu */
- memcpy( &p_nal->p_buffer[4], p, i_size );
- VLC_UNUSED(p_dec);
- return p_nal;
- }
- static void CreateDecodedNAL( uint8_t **pp_ret, int *pi_ret,
- const uint8_t *src, int i_src )
- {
- const uint8_t *end = &src[i_src];
- uint8_t *dst = malloc( i_src );
- *pp_ret = dst;
- if( dst )
- {
- while( src < end )
- {
- if( src < end - 3 && src[0] == 0x00 && src[1] == 0x00 &&
- src[2] == 0x03 )
- {
- *dst++ = 0x00;
- *dst++ = 0x00;
- src += 3;
- continue;
- }
- *dst++ = *src++;
- }
- }
- *pi_ret = dst - *pp_ret;
- }
- static inline int bs_read_ue( bs_t *s )
- {
- int i = 0;
- while( bs_read1( s ) == 0 && s->p < s->p_end && i < 32 )
- {
- i++;
- }
- return( ( 1 << i) - 1 + bs_read( s, i ) );
- }
- static inline int bs_read_se( bs_t *s )
- {
- int val = bs_read_ue( s );
- return val&0x01 ? (val+1)/2 : -(val/2);
- }
- /*****************************************************************************
- * ParseNALBlock: parses annexB type NALs
- * All p_frag blocks are required to start with 0 0 0 1 4-byte startcode
- *****************************************************************************/
- static block_t *ParseNALBlock( decoder_t *p_dec, bool *pb_used_ts, block_t *p_frag )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- block_t *p_pic = NULL;
- const int i_nal_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
- const int i_nal_type = p_frag->p_buffer[4]&0x1f;
- const mtime_t i_frag_dts = p_frag->i_dts;
- const mtime_t i_frag_pts = p_frag->i_pts;
- if( p_sys->b_slice && ( !p_sys->b_sps || !p_sys->b_pps ) )
- {
- block_ChainRelease( p_sys->p_frame );
- msg_Warn( p_dec, "waiting for SPS/PPS" );
- /* Reset context */
- p_sys->slice.i_frame_type = 0;
- p_sys->p_frame = NULL;
- p_sys->b_slice = false;
- cc_Flush( &p_sys->cc_next );
- }
- if( ( !p_sys->b_sps || !p_sys->b_pps ) &&
- i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
- {
- p_sys->b_slice = true;
- /* Fragment will be discarded later on */
- }
- else if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
- {
- slice_t slice;
- bool b_new_picture;
- ParseSlice( p_dec, &b_new_picture, &slice, i_nal_ref_idc, i_nal_type, p_frag );
- /* */
- if( b_new_picture && p_sys->b_slice )
- p_pic = OutputPicture( p_dec );
- /* */
- p_sys->slice = slice;
- p_sys->b_slice = true;
- }
- else if( i_nal_type == NAL_SPS )
- {
- if( p_sys->b_slice )
- p_pic = OutputPicture( p_dec );
- PutSPS( p_dec, p_frag );
- /* Do not append the SPS because we will insert it on keyframes */
- p_frag = NULL;
- }
- else if( i_nal_type == NAL_PPS )
- {
- if( p_sys->b_slice )
- p_pic = OutputPicture( p_dec );
- PutPPS( p_dec, p_frag );
- /* Do not append the PPS because we will insert it on keyframes */
- p_frag = NULL;
- }
- else if( i_nal_type == NAL_AU_DELIMITER ||
- i_nal_type == NAL_SEI ||
- ( i_nal_type >= 13 && i_nal_type <= 18 ) )
- {
- if( p_sys->b_slice )
- p_pic = OutputPicture( p_dec );
- /* Parse SEI for CC support */
- if( i_nal_type == NAL_SEI )
- ParseSei( p_dec, p_frag );
- }
- /* Append the block */
- if( p_frag )
- block_ChainAppend( &p_sys->p_frame, p_frag );
- *pb_used_ts = false;
- if( p_sys->i_frame_dts < 0 && p_sys->i_frame_pts < 0 )
- {
- p_sys->i_frame_dts = i_frag_dts;
- p_sys->i_frame_pts = i_frag_pts;
- *pb_used_ts = true;
- }
- return p_pic;
- }
- static block_t *OutputPicture( decoder_t *p_dec )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- block_t *p_pic;
- if( !p_sys->b_header && p_sys->slice.i_frame_type != BLOCK_FLAG_TYPE_I)
- return NULL;
- if( p_sys->slice.i_frame_type == BLOCK_FLAG_TYPE_I && p_sys->b_sps && p_sys->b_pps )
- {
- block_t *p_list = NULL;
- int i;
- for( i = 0; i < SPS_MAX; i++ )
- {
- if( p_sys->pp_sps[i] )
- block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_sps[i] ) );
- }
- for( i = 0; i < PPS_MAX; i++ )
- {
- if( p_sys->pp_pps[i] )
- block_ChainAppend( &p_list, block_Duplicate( p_sys->pp_pps[i] ) );
- }
- if( p_list )
- p_sys->b_header = true;
- block_ChainAppend( &p_list, p_sys->p_frame );
- p_pic = block_ChainGather( p_list );
- }
- else
- {
- p_pic = block_ChainGather( p_sys->p_frame );
- }
- p_pic->i_dts = p_sys->i_frame_dts;
- p_pic->i_pts = p_sys->i_frame_pts;
- p_pic->i_length = 0; /* FIXME */
- p_pic->i_flags |= p_sys->slice.i_frame_type;
- p_sys->slice.i_frame_type = 0;
- p_sys->p_frame = NULL;
- p_sys->i_frame_dts = -1;
- p_sys->i_frame_pts = -1;
- p_sys->b_slice = false;
- /* CC */
- p_sys->i_cc_pts = p_pic->i_pts;
- p_sys->i_cc_dts = p_pic->i_dts;
- p_sys->i_cc_flags = p_pic->i_flags;
- /* Swap cc buffer */
- cc_data_t cc_tmp = p_sys->cc;
- p_sys->cc = p_sys->cc_next;
- p_sys->cc_next = cc_tmp;
- cc_Flush( &p_sys->cc_next );
- return p_pic;
- }
- static void PutSPS( decoder_t *p_dec, block_t *p_frag )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- uint8_t *pb_dec = NULL;
- int i_dec = 0;
- bs_t s;
- int i_tmp;
- int i_sps_id;
- CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
- p_frag->i_buffer - 5 );
- bs_init( &s, pb_dec, i_dec );
- int i_profile_idc = bs_read( &s, 8 );
- /* Skip constraint_set0123, reserved(4), level(8) */
- bs_skip( &s, 1+1+1+1 + 4 + 8 );
- /* sps id */
- i_sps_id = bs_read_ue( &s );
- if( i_sps_id >= SPS_MAX )
- {
- msg_Warn( p_dec, "invalid SPS (sps_id=%d)", i_sps_id );
- free( pb_dec );
- block_Release( p_frag );
- return;
- }
- if( i_profile_idc == 100 || i_profile_idc == 110 ||
- i_profile_idc == 122 || i_profile_idc == 244 ||
- i_profile_idc == 44 || i_profile_idc == 83 ||
- i_profile_idc == 86 )
- {
- /* chroma_format_idc */
- const int i_chroma_format_idc = bs_read_ue( &s );
- if( i_chroma_format_idc == 3 )
- bs_skip( &s, 1 ); /* seperate_colour_plane_flag */
- /* bit_depth_luma_minus8 */
- bs_read_ue( &s );
- /* bit_depth_chroma_minus8 */
- bs_read_ue( &s );
- /* qpprime_y_zero_transform_bypass_flag */
- bs_skip( &s, 1 );
- /* seq_scaling_matrix_present_flag */
- i_tmp = bs_read( &s, 1 );
- if( i_tmp )
- {
- for( int i = 0; i < ((3 != i_chroma_format_idc) ? 8 : 12); i++ )
- {
- /* seq_scaling_list_present_flag[i] */
- i_tmp = bs_read( &s, 1 );
- if( !i_tmp )
- continue;
- const int i_size_of_scaling_list = (i < 6 ) ? 16 : 64;
- /* scaling_list (...) */
- int i_lastscale = 8;
- int i_nextscale = 8;
- for( int j = 0; j < i_size_of_scaling_list; j++ )
- {
- if( i_nextscale != 0 )
- {
- /* delta_scale */
- i_tmp = bs_read( &s, 1 );
- i_nextscale = ( i_lastscale + i_tmp + 256 ) % 256;
- /* useDefaultScalingMatrixFlag = ... */
- }
- /* scalinglist[j] */
- i_lastscale = ( i_nextscale == 0 ) ? i_lastscale : i_nextscale;
- }
- }
- }
- }
- /* Skip i_log2_max_frame_num */
- p_sys->i_log2_max_frame_num = bs_read_ue( &s );
- if( p_sys->i_log2_max_frame_num > 12)
- p_sys->i_log2_max_frame_num = 12;
- /* Read poc_type */
- p_sys->i_pic_order_cnt_type = bs_read_ue( &s );
- if( p_sys->i_pic_order_cnt_type == 0 )
- {
- /* skip i_log2_max_poc_lsb */
- p_sys->i_log2_max_pic_order_cnt_lsb = bs_read_ue( &s );
- if( p_sys->i_log2_max_pic_order_cnt_lsb > 12 )
- p_sys->i_log2_max_pic_order_cnt_lsb = 12;
- }
- else if( p_sys->i_pic_order_cnt_type == 1 )
- {
- int i_cycle;
- /* skip b_delta_pic_order_always_zero */
- p_sys->i_delta_pic_order_always_zero_flag = bs_read( &s, 1 );
- /* skip i_offset_for_non_ref_pic */
- bs_read_se( &s );
- /* skip i_offset_for_top_to_bottom_field */
- bs_read_se( &s );
- /* read i_num_ref_frames_in_poc_cycle */
- i_cycle = bs_read_ue( &s );
- if( i_cycle > 256 ) i_cycle = 256;
- while( i_cycle > 0 )
- {
- /* skip i_offset_for_ref_frame */
- bs_read_se(&s );
- i_cycle--;
- }
- }
- /* i_num_ref_frames */
- bs_read_ue( &s );
- /* b_gaps_in_frame_num_value_allowed */
- bs_skip( &s, 1 );
- /* Read size */
- p_dec->fmt_out.video.i_width = 16 * ( bs_read_ue( &s ) + 1 );
- p_dec->fmt_out.video.i_height = 16 * ( bs_read_ue( &s ) + 1 );
- /* b_frame_mbs_only */
- p_sys->b_frame_mbs_only = bs_read( &s, 1 );
- if( p_sys->b_frame_mbs_only == 0 )
- {
- bs_skip( &s, 1 );
- }
- /* b_direct8x8_inference */
- bs_skip( &s, 1 );
- /* crop */
- i_tmp = bs_read( &s, 1 );
- if( i_tmp )
- {
- /* left */
- bs_read_ue( &s );
- /* right */
- bs_read_ue( &s );
- /* top */
- bs_read_ue( &s );
- /* bottom */
- bs_read_ue( &s );
- }
- /* vui */
- i_tmp = bs_read( &s, 1 );
- if( i_tmp )
- {
- /* read the aspect ratio part if any */
- i_tmp = bs_read( &s, 1 );
- if( i_tmp )
- {
- static const struct { int w, h; } sar[17] =
- {
- { 0, 0 }, { 1, 1 }, { 12, 11 }, { 10, 11 },
- { 16, 11 }, { 40, 33 }, { 24, 11 }, { 20, 11 },
- { 32, 11 }, { 80, 33 }, { 18, 11 }, { 15, 11 },
- { 64, 33 }, { 160,99 }, { 4, 3 }, { 3, 2 },
- { 2, 1 },
- };
- int i_sar = bs_read( &s, 8 );
- int w, h;
- if( i_sar < 17 )
- {
- w = sar[i_sar].w;
- h = sar[i_sar].h;
- }
- else if( i_sar == 255 )
- {
- w = bs_read( &s, 16 );
- h = bs_read( &s, 16 );
- }
- else
- {
- w = 0;
- h = 0;
- }
- if( h != 0 )
- p_dec->fmt_out.video.i_aspect = (int64_t)VOUT_ASPECT_FACTOR *
- ( w * p_dec->fmt_out.video.i_width ) /
- ( h * p_dec->fmt_out.video.i_height);
- else
- p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR;
- }
- }
- free( pb_dec );
- /* We have a new SPS */
- if( !p_sys->b_sps )
- msg_Dbg( p_dec, "found NAL_SPS (sps_id=%d)", i_sps_id );
- p_sys->b_sps = true;
- if( p_sys->pp_sps[i_sps_id] )
- block_Release( p_sys->pp_sps[i_sps_id] );
- p_sys->pp_sps[i_sps_id] = p_frag;
- }
- static void PutPPS( decoder_t *p_dec, block_t *p_frag )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- bs_t s;
- int i_pps_id;
- int i_sps_id;
- bs_init( &s, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
- i_pps_id = bs_read_ue( &s ); // pps id
- i_sps_id = bs_read_ue( &s ); // sps id
- if( i_pps_id >= PPS_MAX || i_sps_id >= SPS_MAX )
- {
- msg_Warn( p_dec, "invalid PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
- block_Release( p_frag );
- return;
- }
- bs_skip( &s, 1 ); // entropy coding mode flag
- p_sys->i_pic_order_present_flag = bs_read( &s, 1 );
- /* TODO */
- /* We have a new PPS */
- if( !p_sys->b_pps )
- msg_Dbg( p_dec, "found NAL_PPS (pps_id=%d sps_id=%d)", i_pps_id, i_sps_id );
- p_sys->b_pps = true;
- if( p_sys->pp_pps[i_pps_id] )
- block_Release( p_sys->pp_pps[i_pps_id] );
- p_sys->pp_pps[i_pps_id] = p_frag;
- }
- static void ParseSlice( decoder_t *p_dec, bool *pb_new_picture, slice_t *p_slice,
- int i_nal_ref_idc, int i_nal_type, const block_t *p_frag )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- uint8_t *pb_dec;
- int i_dec;
- int i_first_mb, i_slice_type;
- slice_t slice;
- bs_t s;
- /* do not convert the whole frame */
- CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5],
- __MIN( p_frag->i_buffer - 5, 60 ) );
- bs_init( &s, pb_dec, i_dec );
- /* first_mb_in_slice */
- i_first_mb = bs_read_ue( &s );
- /* slice_type */
- switch( (i_slice_type = bs_read_ue( &s )) )
- {
- case 0: case 5:
- slice.i_frame_type = BLOCK_FLAG_TYPE_P;
- break;
- case 1: case 6:
- slice.i_frame_type = BLOCK_FLAG_TYPE_B;
- break;
- case 2: case 7:
- slice.i_frame_type = BLOCK_FLAG_TYPE_I;
- break;
- case 3: case 8: /* SP */
- slice.i_frame_type = BLOCK_FLAG_TYPE_P;
- break;
- case 4: case 9:
- slice.i_frame_type = BLOCK_FLAG_TYPE_I;
- break;
- default:
- slice.i_frame_type = 0;
- break;
- }
- /* */
- slice.i_nal_type = i_nal_type;
- slice.i_nal_ref_idc = i_nal_ref_idc;
- slice.i_pic_parameter_set_id = bs_read_ue( &s );
- slice.i_frame_num = bs_read( &s, p_sys->i_log2_max_frame_num + 4 );
- slice.i_field_pic_flag = 0;
- slice.i_bottom_field_flag = -1;
- if( !p_sys->b_frame_mbs_only )
- {
- /* field_pic_flag */
- slice.i_field_pic_flag = bs_read( &s, 1 );
- if( slice.i_field_pic_flag )
- slice.i_bottom_field_flag = bs_read( &s, 1 );
- }
- slice.i_idr_pic_id = p_sys->slice.i_idr_pic_id;
- if( slice.i_nal_type == NAL_SLICE_IDR )
- slice.i_idr_pic_id = bs_read_ue( &s );
- slice.i_pic_order_cnt_lsb = -1;
- slice.i_delta_pic_order_cnt_bottom = -1;
- slice.i_delta_pic_order_cnt0 = 0;
- slice.i_delta_pic_order_cnt1 = 0;
- if( p_sys->i_pic_order_cnt_type == 0 )
- {
- slice.i_pic_order_cnt_lsb = bs_read( &s, p_sys->i_log2_max_pic_order_cnt_lsb + 4 );
- if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
- slice.i_delta_pic_order_cnt_bottom = bs_read_se( &s );
- }
- else if( (p_sys->i_pic_order_cnt_type == 1) &&
- (!p_sys->i_delta_pic_order_always_zero_flag) )
- {
- slice.i_delta_pic_order_cnt0 = bs_read_se( &s );
- if( p_sys->i_pic_order_present_flag && !slice.i_field_pic_flag )
- slice.i_delta_pic_order_cnt1 = bs_read_se( &s );
- }
- free( pb_dec );
- /* Detection of the first VCL NAL unit of a primary coded picture
- * (cf. 7.4.1.2.4) */
- bool b_pic = false;
- if( slice.i_frame_num != p_sys->slice.i_frame_num ||
- slice.i_pic_parameter_set_id != p_sys->slice.i_pic_parameter_set_id ||
- slice.i_field_pic_flag != p_sys->slice.i_field_pic_flag ||
- slice.i_nal_ref_idc != p_sys->slice.i_nal_ref_idc )
- b_pic = true;
- if( (slice.i_bottom_field_flag != -1) &&
- (p_sys->slice.i_bottom_field_flag != -1) &&
- (slice.i_bottom_field_flag != p_sys->slice.i_bottom_field_flag) )
- b_pic = true;
- if( p_sys->i_pic_order_cnt_type == 0 &&
- ( slice.i_pic_order_cnt_lsb != p_sys->slice.i_pic_order_cnt_lsb ||
- slice.i_delta_pic_order_cnt_bottom != p_sys->slice.i_delta_pic_order_cnt_bottom ) )
- b_pic = true;
- else if( p_sys->i_pic_order_cnt_type == 1 &&
- ( slice.i_delta_pic_order_cnt0 != p_sys->slice.i_delta_pic_order_cnt0 ||
- slice.i_delta_pic_order_cnt1 != p_sys->slice.i_delta_pic_order_cnt1 ) )
- b_pic = true;
- if( ( slice.i_nal_type == NAL_SLICE_IDR || p_sys->slice.i_nal_type == NAL_SLICE_IDR ) &&
- ( slice.i_nal_type != p_sys->slice.i_nal_type || slice.i_idr_pic_id != p_sys->slice.i_idr_pic_id ) )
- b_pic = true;
- /* */
- *pb_new_picture = b_pic;
- *p_slice = slice;
- }
- static void ParseSei( decoder_t *p_dec, block_t *p_frag )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- uint8_t *pb_dec;
- int i_dec;
- /* */
- CreateDecodedNAL( &pb_dec, &i_dec, &p_frag->p_buffer[5], p_frag->i_buffer - 5 );
- if( !pb_dec )
- return;
- /* The +1 is for rbsp trailing bits */
- for( int i_used = 0; i_used+1 < i_dec; )
- {
- /* Read type */
- int i_type = 0;
- while( i_used+1 < i_dec )
- {
- const int i_byte = pb_dec[i_used++];
- i_type += i_byte;
- if( i_byte != 0xff )
- break;
- }
- /* Read size */
- int i_size = 0;
- while( i_used+1 < i_dec )
- {
- const int i_byte = pb_dec[i_used++];
- i_size += i_byte;
- if( i_byte != 0xff )
- break;
- }
- /* Check room */
- if( i_used + i_size + 1 > i_dec )
- break;
- /* Look for user_data_registered_itu_t_t35 */
- if( i_type == 4 )
- {
- static const uint8_t p_dvb1_data_start_code[] = {
- 0xb5,
- 0x00, 0x31,
- 0x47, 0x41, 0x39, 0x34
- };
- const int i_t35 = i_size;
- const uint8_t *p_t35 = &pb_dec[i_used];
- /* Check for we have DVB1_data() */
- if( i_t35 >= 5 &&
- !memcmp( p_t35, p_dvb1_data_start_code, sizeof(p_dvb1_data_start_code) ) )
- {
- cc_Extract( &p_sys->cc_next, &p_t35[3], i_t35 - 3 );
- }
- }
- i_used += i_size;
- }
- free( pb_dec );
- }