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h264.c
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/*****************************************************************************
* h264.c: h264/avc video packetizer
*****************************************************************************
* Copyright (C) 2001, 2002, 2006 VLC authors and VideoLAN
* $Id$
*
* 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 Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 "h264_nal.h"
#include "h264_slice.h"
#include "hxxx_nal.h"
#include "hxxx_sei.h"
#include "hxxx_common.h"
#include "packetizer_helper.h"
#include "startcode_helper.h"
#include <limits.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
****************************************************************************/
struct decoder_sys_t
{
/* */
packetizer_t packetizer;
/* */
bool b_slice;
struct
{
block_t *p_head;
block_t **pp_append;
} frame, leading;
/* a new sps/pps can be transmitted outside of iframes */
bool b_new_sps;
bool b_new_pps;
struct
{
block_t *p_block;
h264_sequence_parameter_set_t *p_sps;
} sps[H264_SPS_ID_MAX + 1];
struct
{
block_t *p_block;
h264_picture_parameter_set_t *p_pps;
} pps[H264_PPS_ID_MAX + 1];
const h264_sequence_parameter_set_t *p_active_sps;
const h264_picture_parameter_set_t *p_active_pps;
/* avcC data */
uint8_t i_avcC_length_size;
/* From SEI for current frame */
uint8_t i_pic_struct;
uint8_t i_dpb_output_delay;
unsigned i_recovery_frame_cnt;
/* Useful values of the Slice Header */
h264_slice_t slice;
/* */
int i_next_block_flags;
bool b_recovered;
unsigned i_recoveryfnum;
unsigned i_recoverystartfnum;
/* POC */
h264_poc_context_t pocctx;
struct
{
mtime_t pts;
int num;
} prevdatedpoc;
mtime_t i_frame_pts;
mtime_t i_frame_dts;
date_t dts;
/* */
cc_storage_t *p_ccs;
};
#define BLOCK_FLAG_PRIVATE_AUD (1 << BLOCK_FLAG_PRIVATE_SHIFT)
#define BLOCK_FLAG_PRIVATE_SEI (2 << BLOCK_FLAG_PRIVATE_SHIFT)
#define BLOCK_FLAG_DROP (4 << BLOCK_FLAG_PRIVATE_SHIFT)
static block_t *Packetize( decoder_t *, block_t ** );
static block_t *PacketizeAVC1( decoder_t *, block_t ** );
static block_t *GetCc( decoder_t *p_dec, decoder_cc_desc_t * );
static void PacketizeFlush( decoder_t * );
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_ts_used, block_t * );
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 bool ParseSliceHeader( decoder_t *p_dec, const block_t *p_frag, h264_slice_t *p_slice );
static bool ParseSeiCallback( const hxxx_sei_data_t *, void * );
static const uint8_t p_h264_startcode[3] = { 0x00, 0x00, 0x01 };
/*****************************************************************************
* Helpers
*****************************************************************************/
static void StoreSPS( decoder_sys_t *p_sys, uint8_t i_id,
block_t *p_block, h264_sequence_parameter_set_t *p_sps )
{
if( p_sys->sps[i_id].p_block )
block_Release( p_sys->sps[i_id].p_block );
if( p_sys->sps[i_id].p_sps )
h264_release_sps( p_sys->sps[i_id].p_sps );
if( p_sys->sps[i_id].p_sps == p_sys->p_active_sps )
p_sys->p_active_sps = NULL;
p_sys->sps[i_id].p_block = p_block;
p_sys->sps[i_id].p_sps = p_sps;
}
static void StorePPS( decoder_sys_t *p_sys, uint8_t i_id,
block_t *p_block, h264_picture_parameter_set_t *p_pps )
{
if( p_sys->pps[i_id].p_block )
block_Release( p_sys->pps[i_id].p_block );
if( p_sys->pps[i_id].p_pps )
h264_release_pps( p_sys->pps[i_id].p_pps );
if( p_sys->pps[i_id].p_pps == p_sys->p_active_pps )
p_sys->p_active_pps = NULL;
p_sys->pps[i_id].p_block = p_block;
p_sys->pps[i_id].p_pps = p_pps;
}
static void ActivateSets( decoder_t *p_dec, const h264_sequence_parameter_set_t *p_sps,
const h264_picture_parameter_set_t *p_pps )
{
decoder_sys_t *p_sys = p_dec->p_sys;
p_sys->p_active_pps = p_pps;
p_sys->p_active_sps = p_sps;
if( p_sps )
{
p_dec->fmt_out.i_profile = p_sps->i_profile;
p_dec->fmt_out.i_level = p_sps->i_level;
(void) h264_get_picture_size( p_sps, &p_dec->fmt_out.video.i_width,
&p_dec->fmt_out.video.i_height,
&p_dec->fmt_out.video.i_visible_width,
&p_dec->fmt_out.video.i_visible_height );
if( p_sps->vui.i_sar_num != 0 && p_sps->vui.i_sar_den != 0 )
{
p_dec->fmt_out.video.i_sar_num = p_sps->vui.i_sar_num;
p_dec->fmt_out.video.i_sar_den = p_sps->vui.i_sar_den;
}
if( p_sps->vui.b_valid )
{
if( !p_dec->fmt_in.video.i_frame_rate_base &&
p_sps->vui.i_num_units_in_tick > 0 && p_sps->vui.i_time_scale > 1 )
{
const unsigned i_rate_base = p_sps->vui.i_num_units_in_tick;
const unsigned i_rate = p_sps->vui.i_time_scale >> 1; /* num_clock_ts == 2 */
if( i_rate_base != p_dec->fmt_out.video.i_frame_rate_base ||
i_rate != p_dec->fmt_out.video.i_frame_rate )
{
p_dec->fmt_out.video.i_frame_rate_base = i_rate_base;
p_dec->fmt_out.video.i_frame_rate = i_rate;
date_Change( &p_sys->dts, p_sps->vui.i_time_scale, p_sps->vui.i_num_units_in_tick );
}
}
if( p_dec->fmt_in.video.primaries == COLOR_PRIMARIES_UNDEF )
h264_get_colorimetry( p_sps, &p_dec->fmt_out.video.primaries,
&p_dec->fmt_out.video.transfer,
&p_dec->fmt_out.video.space,
&p_dec->fmt_out.video.b_color_range_full );
}
if( p_dec->fmt_out.i_extra == 0 && p_pps )
{
const block_t *p_spsblock = NULL;
const block_t *p_ppsblock = NULL;
for( size_t i=0; i<=H264_SPS_ID_MAX && !p_spsblock; i++ )
if( p_sps == p_sys->sps[i].p_sps )
p_spsblock = p_sys->sps[i].p_block;
for( size_t i=0; i<=H264_PPS_ID_MAX && !p_ppsblock; i++ )
if( p_pps == p_sys->pps[i].p_pps )
p_ppsblock = p_sys->pps[i].p_block;
if( p_spsblock && p_ppsblock )
{
size_t i_alloc = p_ppsblock->i_buffer + p_spsblock->i_buffer;
p_dec->fmt_out.p_extra = malloc( i_alloc );
if( p_dec->fmt_out.p_extra )
{
uint8_t*p_buf = p_dec->fmt_out.p_extra;
p_dec->fmt_out.i_extra = i_alloc;
memcpy( &p_buf[0], p_spsblock->p_buffer, p_spsblock->i_buffer );
memcpy( &p_buf[p_spsblock->i_buffer], p_ppsblock->p_buffer,
p_ppsblock->i_buffer );
}
}
}
}
}
static bool IsFirstVCLNALUnit( const h264_slice_t *p_prev, const h264_slice_t *p_cur )
{
/* Detection of the first VCL NAL unit of a primary coded picture
* (cf. 7.4.1.2.4) */
if( p_cur->i_frame_num != p_prev->i_frame_num ||
p_cur->i_pic_parameter_set_id != p_prev->i_pic_parameter_set_id ||
p_cur->i_field_pic_flag != p_prev->i_field_pic_flag ||
!p_cur->i_nal_ref_idc != !p_prev->i_nal_ref_idc )
return true;
if( (p_cur->i_bottom_field_flag != -1) &&
(p_prev->i_bottom_field_flag != -1) &&
(p_cur->i_bottom_field_flag != p_prev->i_bottom_field_flag) )
return true;
if( p_cur->i_pic_order_cnt_type == 0 &&
( p_cur->i_pic_order_cnt_lsb != p_prev->i_pic_order_cnt_lsb ||
p_cur->i_delta_pic_order_cnt_bottom != p_prev->i_delta_pic_order_cnt_bottom ) )
return true;
else if( p_cur->i_pic_order_cnt_type == 1 &&
( p_cur->i_delta_pic_order_cnt0 != p_prev->i_delta_pic_order_cnt0 ||
p_cur->i_delta_pic_order_cnt1 != p_prev->i_delta_pic_order_cnt1 ) )
return true;
if( ( p_cur->i_nal_type == H264_NAL_SLICE_IDR || p_prev->i_nal_type == H264_NAL_SLICE_IDR ) &&
( p_cur->i_nal_type != p_prev->i_nal_type || p_cur->i_idr_pic_id != p_prev->i_idr_pic_id ) )
return true;
return false;
}
static void DropStoredNAL( decoder_sys_t *p_sys )
{
block_ChainRelease( p_sys->frame.p_head );
block_ChainRelease( p_sys->leading.p_head );
p_sys->frame.p_head = NULL;
p_sys->frame.pp_append = &p_sys->frame.p_head;
p_sys->leading.p_head = NULL;
p_sys->leading.pp_append = &p_sys->leading.p_head;
}
/*****************************************************************************
* 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;
const bool b_avc = (p_dec->fmt_in.i_original_fourcc == VLC_FOURCC( 'a', 'v', 'c', '1' ));
if( p_dec->fmt_in.i_codec != VLC_CODEC_H264 )
return VLC_EGENERIC;
if( b_avc && 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;
}
p_sys->p_ccs = cc_storage_new();
if( unlikely(!p_sys->p_ccs) )
{
free( p_dec->p_sys );
return VLC_ENOMEM;
}
packetizer_Init( &p_sys->packetizer,
p_h264_startcode, sizeof(p_h264_startcode), startcode_FindAnnexB,
p_h264_startcode, 1, 5,
PacketizeReset, PacketizeParse, PacketizeValidate, p_dec );
p_sys->b_slice = false;
p_sys->frame.p_head = NULL;
p_sys->frame.pp_append = &p_sys->frame.p_head;
p_sys->leading.p_head = NULL;
p_sys->leading.pp_append = &p_sys->leading.p_head;
p_sys->b_new_sps = false;
p_sys->b_new_pps = false;
for( i = 0; i <= H264_SPS_ID_MAX; i++ )
{
p_sys->sps[i].p_sps = NULL;
p_sys->sps[i].p_block = NULL;
}
p_sys->p_active_sps = NULL;
for( i = 0; i <= H264_PPS_ID_MAX; i++ )
{
p_sys->pps[i].p_pps = NULL;
p_sys->pps[i].p_block = NULL;
}
p_sys->p_active_pps = NULL;
p_sys->i_recovery_frame_cnt = UINT_MAX;
h264_slice_init( &p_sys->slice );
p_sys->i_next_block_flags = 0;
p_sys->b_recovered = false;
p_sys->i_recoveryfnum = UINT_MAX;
p_sys->i_frame_dts = VLC_TS_INVALID;
p_sys->i_frame_pts = VLC_TS_INVALID;
p_sys->i_dpb_output_delay = 0;
/* POC */
h264_poc_context_init( &p_sys->pocctx );
p_sys->prevdatedpoc.pts = VLC_TS_INVALID;
date_Init( &p_sys->dts, 30000 * 2, 1001 );
date_Set( &p_sys->dts, VLC_TS_INVALID );
/* Setup properties */
es_format_Copy( &p_dec->fmt_out, &p_dec->fmt_in );
p_dec->fmt_out.i_codec = VLC_CODEC_H264;
p_dec->fmt_out.b_packetized = true;
if( p_dec->fmt_in.video.i_frame_rate_base &&
p_dec->fmt_in.video.i_frame_rate &&
p_dec->fmt_in.video.i_frame_rate <= UINT_MAX / 2 )
{
date_Change( &p_sys->dts, p_dec->fmt_in.video.i_frame_rate * 2,
p_dec->fmt_in.video.i_frame_rate_base );
}
if( b_avc )
{
/* 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 */
if( h264_isavcC( p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra ) )
{
free( p_dec->fmt_out.p_extra );
size_t i_size;
p_dec->fmt_out.p_extra = h264_avcC_to_AnnexB_NAL( p_dec->fmt_in.p_extra,
p_dec->fmt_in.i_extra,
&i_size,
&p_sys->i_avcC_length_size );
p_dec->fmt_out.i_extra = i_size;
p_sys->b_recovered = !!p_dec->fmt_out.i_extra;
if(!p_dec->fmt_out.p_extra)
{
msg_Err( p_dec, "Invalid AVC extradata");
Close( p_this );
return VLC_EGENERIC;
}
}
else
{
msg_Err( p_dec, "Invalid or missing AVC extradata");
Close( p_this );
return VLC_EGENERIC;
}
/* Set callback */
p_dec->pf_packetize = PacketizeAVC1;
}
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;
}
/* */
if( p_dec->fmt_out.i_extra > 0 )
{
packetizer_Header( &p_sys->packetizer,
p_dec->fmt_out.p_extra, p_dec->fmt_out.i_extra );
}
if( b_avc )
{
/* FIXME: that's not correct for every AVC */
if( !p_sys->b_new_pps || !p_sys->b_new_sps )
{
msg_Err( p_dec, "Invalid or missing SPS %d or PPS %d in AVC extradata",
p_sys->b_new_sps, p_sys->b_new_pps );
Close( p_this );
return VLC_EGENERIC;
}
msg_Dbg( p_dec, "Packetizer fed with AVC, nal length size=%d",
p_sys->i_avcC_length_size );
}
/* CC are the same for H264/AVC in T35 sections (ETSI TS 101 154) */
p_dec->pf_get_cc = GetCc;
p_dec->pf_flush = PacketizeFlush;
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;
DropStoredNAL( p_sys );
for( i = 0; i <= H264_SPS_ID_MAX; i++ )
StoreSPS( p_sys, i, NULL, NULL );
for( i = 0; i <= H264_PPS_ID_MAX; i++ )
StorePPS( p_sys, i, NULL, NULL );
packetizer_Clean( &p_sys->packetizer );
cc_storage_delete( p_sys->p_ccs );
free( p_sys );
}
static void PacketizeFlush( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
packetizer_Flush( &p_sys->packetizer );
}
/****************************************************************************
* 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;
return PacketizeXXC1( p_dec, p_sys->i_avcC_length_size,
pp_block, ParseNALBlock );
}
/*****************************************************************************
* GetCc:
*****************************************************************************/
static block_t *GetCc( decoder_t *p_dec, decoder_cc_desc_t *p_desc )
{
return cc_storage_get_current( p_dec->p_sys->p_ccs, p_desc );
}
/****************************************************************************
* Helpers
****************************************************************************/
static void ResetOutputVariables( decoder_sys_t *p_sys )
{
p_sys->i_frame_dts = VLC_TS_INVALID;
p_sys->i_frame_pts = VLC_TS_INVALID;
p_sys->slice.type = H264_SLICE_TYPE_UNKNOWN;
p_sys->b_new_sps = false;
p_sys->b_new_pps = false;
p_sys->b_slice = false;
/* From SEI */
p_sys->i_dpb_output_delay = 0;
p_sys->i_pic_struct = UINT8_MAX;
p_sys->i_recovery_frame_cnt = UINT_MAX;
}
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 || !p_sys->b_slice )
{
DropStoredNAL( p_sys );
ResetOutputVariables( p_sys );
p_sys->p_active_pps = NULL;
p_sys->p_active_sps = NULL;
/* POC */
h264_poc_context_init( &p_sys->pocctx );
p_sys->prevdatedpoc.pts = VLC_TS_INVALID;
}
p_sys->i_next_block_flags = BLOCK_FLAG_DISCONTINUITY;
p_sys->b_recovered = false;
p_sys->i_recoveryfnum = UINT_MAX;
date_Set( &p_sys->dts, VLC_TS_INVALID );
}
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 > 5 && 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;
}
/*****************************************************************************
* 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_ts_used, block_t *p_frag )
{
decoder_sys_t *p_sys = p_dec->p_sys;
block_t *p_pic = NULL;
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->p_active_pps || !p_sys->p_active_sps) )
{
msg_Warn( p_dec, "waiting for SPS/PPS" );
/* Reset context */
DropStoredNAL( p_sys );
ResetOutputVariables( p_sys );
cc_storage_reset( p_sys->p_ccs );
}
switch( i_nal_type )
{
/*** Slices ***/
case H264_NAL_SLICE:
case H264_NAL_SLICE_DPA:
case H264_NAL_SLICE_DPB:
case H264_NAL_SLICE_DPC:
case H264_NAL_SLICE_IDR:
{
h264_slice_t newslice;
if( i_nal_type == H264_NAL_SLICE_IDR )
{
p_sys->b_recovered = true;
p_sys->i_recovery_frame_cnt = UINT_MAX;
p_sys->i_recoveryfnum = UINT_MAX;
}
if( ParseSliceHeader( p_dec, p_frag, &newslice ) )
{
/* Only IDR carries the id, to be propagated */
if( newslice.i_idr_pic_id == -1 )
newslice.i_idr_pic_id = p_sys->slice.i_idr_pic_id;
bool b_new_picture = IsFirstVCLNALUnit( &p_sys->slice, &newslice );
if( b_new_picture )
{
/* Parse SEI for that frame now we should have matched SPS/PPS */
for( block_t *p_sei = p_sys->leading.p_head; p_sei; p_sei = p_sei->p_next )
{
if( (p_sei->i_flags & BLOCK_FLAG_PRIVATE_SEI) == 0 )
continue;
HxxxParse_AnnexB_SEI( p_sei->p_buffer, p_sei->i_buffer,
1 /* nal header */, ParseSeiCallback, p_dec );
}
if( p_sys->b_slice )
p_pic = OutputPicture( p_dec );
}
/* */
p_sys->slice = newslice;
}
else
{
p_sys->p_active_pps = NULL;
/* Fragment will be discarded later on */
}
p_sys->b_slice = true;
block_ChainLastAppend( &p_sys->frame.pp_append, p_frag );
} break;
/*** Prefix NALs ***/
case H264_NAL_AU_DELIMITER:
if( p_sys->b_slice )
p_pic = OutputPicture( p_dec );
/* clear junk if no pic, we're always the first nal */
DropStoredNAL( p_sys );
p_frag->i_flags |= BLOCK_FLAG_PRIVATE_AUD;
block_ChainLastAppend( &p_sys->leading.pp_append, p_frag );
break;
case H264_NAL_SPS:
case H264_NAL_PPS:
if( p_sys->b_slice )
p_pic = OutputPicture( p_dec );
/* Stored for insert on keyframes */
if( i_nal_type == H264_NAL_SPS )
{
PutSPS( p_dec, p_frag );
p_sys->b_new_sps = true;
}
else
{
PutPPS( p_dec, p_frag );
p_sys->b_new_pps = true;
}
break;
case H264_NAL_SEI:
if( p_sys->b_slice )
p_pic = OutputPicture( p_dec );
p_frag->i_flags |= BLOCK_FLAG_PRIVATE_SEI;
block_ChainLastAppend( &p_sys->leading.pp_append, p_frag );
break;
case H264_NAL_SPS_EXT:
case H264_NAL_PREFIX: /* first slice/VCL associated data */
case H264_NAL_SUBSET_SPS:
case H264_NAL_DEPTH_PS:
case H264_NAL_RESERVED_17:
case H264_NAL_RESERVED_18:
if( p_sys->b_slice )
p_pic = OutputPicture( p_dec );
block_ChainLastAppend( &p_sys->leading.pp_append, p_frag );
break;
/*** Suffix NALs ***/
case H264_NAL_END_OF_SEQ:
case H264_NAL_END_OF_STREAM:
/* Early end of packetization */
block_ChainLastAppend( &p_sys->frame.pp_append, p_frag );
/* important for still pictures/menus */
p_sys->i_next_block_flags |= BLOCK_FLAG_END_OF_SEQUENCE;
if( p_sys->b_slice )
p_pic = OutputPicture( p_dec );
break;
case H264_NAL_SLICE_WP: // post
case H264_NAL_UNKNOWN:
case H264_NAL_FILLER_DATA:
case H264_NAL_SLICE_EXT:
case H264_NAL_SLICE_3D_EXT:
case H264_NAL_RESERVED_22:
case H264_NAL_RESERVED_23:
default: /* others 24..31, including unknown */
block_ChainLastAppend( &p_sys->frame.pp_append, p_frag );
break;
}
*pb_ts_used = false;
if( p_sys->i_frame_dts <= VLC_TS_INVALID &&
p_sys->i_frame_pts <= VLC_TS_INVALID )
{
p_sys->i_frame_dts = i_frag_dts;
p_sys->i_frame_pts = i_frag_pts;
*pb_ts_used = true;
if( i_frag_dts > VLC_TS_INVALID )
date_Set( &p_sys->dts, i_frag_dts );
}
if( p_pic && (p_pic->i_flags & BLOCK_FLAG_DROP) )
{
block_Release( p_pic );
p_pic = NULL;
}
return p_pic;
}
static block_t *OutputPicture( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
block_t *p_pic = NULL;
block_t **pp_pic_last = &p_pic;
if( unlikely(!p_sys->frame.p_head) )
{
assert( p_sys->frame.p_head );
DropStoredNAL( p_sys );
ResetOutputVariables( p_sys );
cc_storage_reset( p_sys->p_ccs );
return NULL;
}
/* Bind matched/referred PPS and SPS */
const h264_picture_parameter_set_t *p_pps = p_sys->p_active_pps;
const h264_sequence_parameter_set_t *p_sps = p_sys->p_active_sps;
if( !p_pps || !p_sps )
{
DropStoredNAL( p_sys );
ResetOutputVariables( p_sys );
cc_storage_reset( p_sys->p_ccs );
return NULL;
}
if( !p_sys->b_recovered && p_sys->i_recoveryfnum == UINT_MAX &&
p_sys->i_recovery_frame_cnt == UINT_MAX && p_sys->slice.type == H264_SLICE_TYPE_I )
{
/* No way to recover using SEI, just sync on I Slice */
p_sys->b_recovered = true;
}
bool b_need_sps_pps = p_sys->slice.type == H264_SLICE_TYPE_I &&
p_sys->p_active_pps && p_sys->p_active_sps;
/* Handle SEI recovery */
if ( !p_sys->b_recovered && p_sys->i_recovery_frame_cnt != UINT_MAX &&
p_sys->i_recoveryfnum == UINT_MAX )
{
p_sys->i_recoveryfnum = p_sys->slice.i_frame_num + p_sys->i_recovery_frame_cnt;
p_sys->i_recoverystartfnum = p_sys->slice.i_frame_num;
b_need_sps_pps = true; /* SPS/PPS must be inserted for SEI recovery */
msg_Dbg( p_dec, "Recovering using SEI, prerolling %u reference pics", p_sys->i_recovery_frame_cnt );
}
if( p_sys->i_recoveryfnum != UINT_MAX )
{
assert(p_sys->b_recovered == false);
const unsigned maxFrameNum = 1 << (p_sps->i_log2_max_frame_num + 4);
if( ( p_sys->i_recoveryfnum > maxFrameNum &&
p_sys->slice.i_frame_num < p_sys->i_recoverystartfnum &&
p_sys->slice.i_frame_num >= p_sys->i_recoveryfnum % maxFrameNum ) ||
( p_sys->i_recoveryfnum <= maxFrameNum &&
p_sys->slice.i_frame_num >= p_sys->i_recoveryfnum ) )
{
p_sys->i_recoveryfnum = UINT_MAX;
p_sys->b_recovered = true;
msg_Dbg( p_dec, "Recovery from SEI recovery point complete" );
}
}
/* Gather PPS/SPS if required */
block_t *p_xpsnal = NULL;
block_t **pp_xpsnal_tail = &p_xpsnal;
if( b_need_sps_pps || p_sys->b_new_sps || p_sys->b_new_pps )
{
for( int i = 0; i <= H264_SPS_ID_MAX && (b_need_sps_pps || p_sys->b_new_sps); i++ )
{
if( p_sys->sps[i].p_block )
block_ChainLastAppend( &pp_xpsnal_tail, block_Duplicate( p_sys->sps[i].p_block ) );
}
for( int i = 0; i < H264_PPS_ID_MAX && (b_need_sps_pps || p_sys->b_new_pps); i++ )
{
if( p_sys->pps[i].p_block )
block_ChainLastAppend( &pp_xpsnal_tail, block_Duplicate( p_sys->pps[i].p_block ) );
}
}
/* Now rebuild NAL Sequence, inserting PPS/SPS if any */
if( p_sys->frame.p_head->i_flags & BLOCK_FLAG_PRIVATE_AUD )
{
block_t *p_au = p_sys->frame.p_head;
p_sys->frame.p_head = p_au->p_next;
p_au->p_next = NULL;
block_ChainLastAppend( &pp_pic_last, p_au );
}
if( p_xpsnal )
block_ChainLastAppend( &pp_pic_last, p_xpsnal );
if( p_sys->leading.p_head )
block_ChainLastAppend( &pp_pic_last, p_sys->leading.p_head );
assert( p_sys->frame.p_head );
if( p_sys->frame.p_head )
block_ChainLastAppend( &pp_pic_last, p_sys->frame.p_head );
/* Reset chains, now empty */
p_sys->frame.p_head = NULL;
p_sys->frame.pp_append = &p_sys->frame.p_head;
p_sys->leading.p_head = NULL;
p_sys->leading.pp_append = &p_sys->leading.p_head;
p_pic = block_ChainGather( p_pic );
if( !p_pic )
{
ResetOutputVariables( p_sys );
cc_storage_reset( p_sys->p_ccs );
return NULL;
}
/* clear up flags gathered */
p_pic->i_flags &= ~BLOCK_FLAG_PRIVATE_MASK;
/* for PTS Fixup, interlaced fields (multiple AU/block) */
int tFOC = 0, bFOC = 0, PictureOrderCount = 0;
h264_compute_poc( p_sps, &p_sys->slice, &p_sys->pocctx, &PictureOrderCount, &tFOC, &bFOC );
unsigned i_num_clock_ts = h264_get_num_ts( p_sps, &p_sys->slice, p_sys->i_pic_struct, tFOC, bFOC );
if( p_sps->frame_mbs_only_flag == 0 && p_sps->vui.b_pic_struct_present_flag )
{
switch( p_sys->i_pic_struct )
{
/* Top and Bottom field slices */
case 1:
case 2:
p_pic->i_flags |= BLOCK_FLAG_SINGLE_FIELD;
p_pic->i_flags |= (!p_sys->slice.i_bottom_field_flag) ? BLOCK_FLAG_TOP_FIELD_FIRST
: BLOCK_FLAG_BOTTOM_FIELD_FIRST;
break;
/* Each of the following slices contains multiple fields */
case 3:
p_pic->i_flags |= BLOCK_FLAG_TOP_FIELD_FIRST;
break;
case 4:
p_pic->i_flags |= BLOCK_FLAG_BOTTOM_FIELD_FIRST;
break;
case 5:
p_pic->i_flags |= BLOCK_FLAG_TOP_FIELD_FIRST;
break;
case 6:
p_pic->i_flags |= BLOCK_FLAG_BOTTOM_FIELD_FIRST;
break;
default:
break;
}
}
/* set dts/pts to current block timestamps */
p_pic->i_dts = p_sys->i_frame_dts;
p_pic->i_pts = p_sys->i_frame_pts;
/* Fixup missing timestamps after split (multiple AU/block)*/
if( p_pic->i_dts <= VLC_TS_INVALID )
p_pic->i_dts = date_Get( &p_sys->dts );
if( p_sys->slice.type == H264_SLICE_TYPE_I )
p_sys->prevdatedpoc.pts = VLC_TS_INVALID;
if( p_pic->i_pts == VLC_TS_INVALID )
{
if( p_sys->prevdatedpoc.pts > VLC_TS_INVALID &&
date_Get( &p_sys->dts ) != VLC_TS_INVALID )
{
date_t pts = p_sys->dts;
date_Set( &pts, p_sys->prevdatedpoc.pts );
int diff = tFOC - p_sys->prevdatedpoc.num;
if( diff > 0 )
date_Increment( &pts, diff );
else
date_Decrement( &pts, -diff );
p_pic->i_pts = date_Get( &pts );
}
/* In case there's no PTS at all */
else if( p_sys->slice.i_nal_ref_idc == 0 &&
p_sys->slice.type == H264_SLICE_TYPE_B )
{
p_pic->i_pts = p_pic->i_dts;
}
else if( p_sys->slice.type == H264_SLICE_TYPE_I &&
date_Get( &p_sys->dts ) != VLC_TS_INVALID )
{
/* Hell no PTS on IDR. We're totally blind */
date_t pts = p_sys->dts;
date_Increment( &pts, 2 );
p_pic->i_pts = date_Get( &pts );
}
}
if( p_pic->i_pts > VLC_TS_INVALID )
{
p_sys->prevdatedpoc.pts = p_pic->i_pts;
p_sys->prevdatedpoc.num = PictureOrderCount;
}
if( p_pic->i_length == 0 )
{
if( p_sps->vui.i_time_scale )
{
p_pic->i_length = CLOCK_FREQ * i_num_clock_ts *
p_sps->vui.i_num_units_in_tick / p_sps->vui.i_time_scale;
}
else
{
date_t next = p_sys->dts;
date_Increment( &next, i_num_clock_ts );
p_pic->i_length = date_Get( &next ) - date_Get( &p_sys->dts );
}
}
#if 0
msg_Err(p_dec, "F/BOC %d/%d POC %d %d rec %d flags %x ref%d fn %d fp %d %d pts %ld len %ld",
tFOC, bFOC, PictureOrderCount,
p_sys->slice.type, p_sys->b_recovered, p_pic->i_flags,
p_sys->slice.i_nal_ref_idc, p_sys->slice.i_frame_num, p_sys->slice.i_field_pic_flag,
p_pic->i_pts - p_pic->i_dts, p_pic->i_pts % (100*CLOCK_FREQ), p_pic->i_length);
#endif
/* save for next pic fixups */
if( date_Get( &p_sys->dts ) != VLC_TS_INVALID )
{
if( p_sys->i_next_block_flags & BLOCK_FLAG_DISCONTINUITY )
date_Set( &p_sys->dts, VLC_TS_INVALID );
else
date_Increment( &p_sys->dts, i_num_clock_ts );
}
if( p_pic )
{
p_pic->i_flags |= p_sys->i_next_block_flags;
p_sys->i_next_block_flags = 0;
}
switch( p_sys->slice.type )
{
case H264_SLICE_TYPE_P:
p_pic->i_flags |= BLOCK_FLAG_TYPE_P;
break;
case H264_SLICE_TYPE_B:
p_pic->i_flags |= BLOCK_FLAG_TYPE_B;
break;
case H264_SLICE_TYPE_I:
p_pic->i_flags |= BLOCK_FLAG_TYPE_I;