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vlc/modules/packetizer/h264.c

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/*****************************************************************************
* h264.c: h264/avc video packetizer
*****************************************************************************
* Copyright (C) 2001, 2002, 2006 VLC authors and VideoLAN
*
* 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_subcategory( SUBCAT_SOUT_PACKETIZER )
set_description( N_("H.264 video packetizer") )
set_capability( "video packetizer", 50 )
set_callbacks( Open, Close )
vlc_module_end ()
/****************************************************************************
* Local prototypes
****************************************************************************/
typedef struct
{
/* */
packetizer_t packetizer;
/* */
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];
struct
{
block_t *p_block;
} spsext[H264_SPSEXT_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;
/* Current Slice Header */
h264_slice_t *p_slice;
/* */
int i_next_block_flags;
bool b_recovered;
unsigned i_recoveryfnum;
unsigned i_recoverystartfnum;
/* POC */
h264_poc_context_t pocctx;
struct
{
vlc_tick_t pts;
int num;
} prevdatedpoc;
vlc_tick_t i_frame_pts;
vlc_tick_t i_frame_dts;
date_t dts;
/* */
cc_storage_t *p_ccs;
} decoder_sys_t;
#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 * PacketizeDrain( void *p_private );
static block_t *ParseNALBlock( decoder_t *, bool *pb_ts_used, block_t * );
static inline block_t *ParseNALBlockW( void *opaque, bool *pb_ts_used, block_t *p_frag )
{
return ParseNALBlock( (decoder_t *) opaque, pb_ts_used, p_frag );
}
static block_t *OutputPicture( decoder_t *p_dec );
static void ReleaseXPS( decoder_sys_t *p_sys );
static bool PutXPS( decoder_t *p_dec, uint8_t i_nal_type, block_t *p_frag );
static h264_slice_t * ParseSliceHeader( decoder_t *p_dec, const block_t *p_frag );
static bool ParseSeiCallback( const hxxx_sei_data_t *, void * );
/*****************************************************************************
* Helpers
*****************************************************************************/
static void LastAppendXPSCopy( const block_t *p_block, block_t ***ppp_last )
{
if( !p_block )
return;
block_t *p_dup = block_Alloc( 4 + p_block->i_buffer );
if( p_dup )
{
memcpy( &p_dup->p_buffer[0], annexb_startcode4, 4 );
memcpy( &p_dup->p_buffer[4], p_block->p_buffer, p_block->i_buffer );
block_ChainLastAppend( ppp_last, p_dup );
}
}
static block_t * GatherSets( decoder_sys_t *p_sys, bool b_need_sps, bool b_need_pps )
{
block_t *p_xpsnal = NULL;
block_t **pp_xpsnal_tail = &p_xpsnal;
for( int i = 0; i <= H264_SPS_ID_MAX && b_need_sps; i++ )
{
LastAppendXPSCopy( p_sys->sps[i].p_block, &pp_xpsnal_tail );
/* 7.4.1.2.3, shall be the next NAL unit after a sequence parameter set NAL unit
* having the same value of seq_parameter_set_id */
LastAppendXPSCopy( p_sys->spsext[i].p_block, &pp_xpsnal_tail );
}
for( int i = 0; i < H264_PPS_ID_MAX && b_need_pps; i++ )
LastAppendXPSCopy( p_sys->pps[i].p_block, &pp_xpsnal_tail );
return p_xpsnal;
}
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 )
{
uint8_t pl[2];
if( h264_get_sps_profile_tier_level( p_sps, pl, &pl[1] ) )
{
p_dec->fmt_out.i_profile = pl[0];
p_dec->fmt_out.i_level = pl[1];
}
(void) h264_get_picture_size( p_sps,
&p_dec->fmt_out.video.i_x_offset,
&p_dec->fmt_out.video.i_y_offset,
&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 );
h264_get_aspect_ratio( p_sps,
&p_dec->fmt_out.video.i_sar_num,
&p_dec->fmt_out.video.i_sar_den );
if( !p_dec->fmt_out.video.i_frame_rate ||
!p_dec->fmt_out.video.i_frame_rate_base )
{
/* on first run == if fmt_in does not provide frame rate info */
/* If we have frame rate info in the stream */
unsigned nd[2];
if( h264_get_frame_rate( p_sps, nd, &nd[1] ) )
date_Change( &p_sys->dts, nd[0], nd[1] );
/* else use the default num/den */
p_dec->fmt_out.video.i_frame_rate = p_sys->dts.i_divider_num >> 1; /* num_clock_ts == 2 */
p_dec->fmt_out.video.i_frame_rate_base = p_sys->dts.i_divider_den;
}
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.color_range );
}
if( p_dec->fmt_out.i_extra == 0 && p_pps )
{
block_t *p_xpsblocks = GatherSets( p_sys, true, true );
if( p_xpsblocks )
{
size_t i_total;
block_ChainProperties( p_xpsblocks, NULL, &i_total, NULL );
p_dec->fmt_out.p_extra = malloc( i_total );
if( p_dec->fmt_out.p_extra )
{
p_dec->fmt_out.i_extra = i_total;
block_ChainExtract( p_xpsblocks, p_dec->fmt_out.p_extra, i_total );
}
block_ChainRelease( p_xpsblocks );
}
}
}
}
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_sys );
return VLC_ENOMEM;
}
packetizer_Init( &p_sys->packetizer,
annexb_startcode3, 3, startcode_FindAnnexB,
annexb_startcode3, 1, 5,
PacketizeReset, PacketizeParse, PacketizeValidate, PacketizeDrain,
p_dec );
p_sys->p_slice = NULL;
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;
for( i = 0; i <= H264_SPSEXT_ID_MAX; i++ )
p_sys->spsext[i].p_block = NULL;
p_sys->i_recovery_frame_cnt = UINT_MAX;
p_sys->i_next_block_flags = 0;
p_sys->b_recovered = false;
p_sys->i_recoveryfnum = UINT_MAX;
p_sys->i_frame_dts = VLC_TICK_INVALID;
p_sys->i_frame_pts = VLC_TICK_INVALID;
p_sys->i_dpb_output_delay = 0;
/* POC */
h264_poc_context_init( &p_sys->pocctx );
p_sys->prevdatedpoc.pts = VLC_TICK_INVALID;
date_Init( &p_sys->dts, 30000 * 2, 1001 );
/* 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;
DropStoredNAL( p_sys );
ReleaseXPS( p_sys );
if( p_sys->p_slice )
h264_slice_release( p_sys->p_slice );
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_dec->obj.logger,
p_sys->i_avcC_length_size, pp_block,
ParseNALBlockW, PacketizeDrain );
}
/*****************************************************************************
* GetCc:
*****************************************************************************/
static block_t *GetCc( decoder_t *p_dec, decoder_cc_desc_t *p_desc )
{
decoder_sys_t *p_sys = p_dec->p_sys;
return cc_storage_get_current( p_sys->p_ccs, p_desc );
}
/****************************************************************************
* Helpers
****************************************************************************/
static void ResetOutputVariables( decoder_sys_t *p_sys )
{
p_sys->i_frame_dts = VLC_TICK_INVALID;
p_sys->i_frame_pts = VLC_TICK_INVALID;
if( p_sys->p_slice )
h264_slice_release( p_sys->p_slice );
p_sys->p_slice = NULL;
p_sys->b_new_sps = false;
p_sys->b_new_pps = 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_flush )
{
decoder_t *p_dec = p_private;
decoder_sys_t *p_sys = p_dec->p_sys;
if( b_flush || !p_sys->p_slice )
{
DropStoredNAL( p_sys );
ResetOutputVariables( p_sys );
p_sys->p_active_pps = NULL;
p_sys->p_active_sps = NULL;
p_sys->b_recovered = false;
p_sys->i_recoveryfnum = UINT_MAX;
/* POC */
h264_poc_context_init( &p_sys->pocctx );
p_sys->prevdatedpoc.pts = VLC_TICK_INVALID;
}
p_sys->i_next_block_flags = BLOCK_FLAG_DISCONTINUITY;
date_Set( &p_sys->dts, VLC_TICK_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;
}
static block_t * PacketizeDrain( void *p_private )
{
decoder_t *p_dec = p_private;
decoder_sys_t *p_sys = p_dec->p_sys;
if( !p_sys->p_slice )
return NULL;
block_t *p_out = OutputPicture( p_dec );
if( p_out && (p_out->i_flags & BLOCK_FLAG_DROP) )
{
block_Release( p_out );
p_out = NULL;
}
return p_out;
}
/*****************************************************************************
* 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 enum h264_nal_unit_type_e i_nal_type = h264_getNALType( &p_frag->p_buffer[4] );
const vlc_tick_t i_frag_dts = p_frag->i_dts;
const vlc_tick_t i_frag_pts = p_frag->i_pts;
bool b_au_end = p_frag->i_flags & BLOCK_FLAG_AU_END;
p_frag->i_flags &= ~BLOCK_FLAG_AU_END;
if( p_sys->p_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 *p_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( (p_newslice = ParseSliceHeader( p_dec, p_frag )) )
{
/* Only IDR carries the id, to be propagated */
h264_slice_copy_idr_id( p_sys->p_slice, p_newslice );
bool b_new_picture = h264_IsFirstVCLNALUnit( p_sys->p_slice, p_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->p_slice )
p_pic = OutputPicture( p_dec );
}
/* */
h264_slice_release( p_sys->p_slice );
p_sys->p_slice = p_newslice;
}
else
{
p_sys->p_active_pps = NULL;
/* Fragment will be discarded later on */
}
block_ChainLastAppend( &p_sys->frame.pp_append, p_frag );
} break;
/*** Prefix NALs ***/
case H264_NAL_AU_DELIMITER:
if( p_sys->p_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->p_slice )
p_pic = OutputPicture( p_dec );
/* Stored for insert on keyframes */
if( i_nal_type == H264_NAL_SPS )
p_sys->b_new_sps |= PutXPS( p_dec, i_nal_type, p_frag );
else
p_sys->b_new_pps |= PutXPS( p_dec, i_nal_type, p_frag );
break;
case H264_NAL_SEI:
if( p_sys->p_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:
PutXPS( p_dec, i_nal_type, p_frag );
if( p_sys->p_slice )
p_pic = OutputPicture( p_dec );
break;
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->p_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->p_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_TICK_INVALID &&
p_sys->i_frame_pts == VLC_TICK_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_TICK_INVALID )
date_Set( &p_sys->dts, i_frag_dts );
}
if( p_sys->p_slice && b_au_end && !p_pic )
{
p_pic = OutputPicture( p_dec );
}
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 && h264_get_slice_type(p_sys->p_slice) == 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 = h264_get_slice_type(p_sys->p_slice) == H264_SLICE_TYPE_I &&
p_sys->p_active_pps && p_sys->p_active_sps;
const unsigned i_frame_num = h264_get_frame_num(p_sys->p_slice);
/* 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 = i_frame_num + p_sys->i_recovery_frame_cnt;
p_sys->i_recoverystartfnum = 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 = h264_get_max_frame_num( p_sps );
if( ( p_sys->i_recoveryfnum > maxFrameNum &&
i_frame_num < p_sys->i_recoverystartfnum &&
i_frame_num >= p_sys->i_recoveryfnum % maxFrameNum ) ||
( p_sys->i_recoveryfnum <= maxFrameNum &&
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 = GatherSets( p_sys, b_need_sps_pps|p_sys->b_new_sps,
b_need_sps_pps|p_sys->b_new_pps );
/* Now rebuild NAL Sequence, inserting PPS/SPS if any */
if( p_sys->leading.p_head &&
(p_sys->leading.p_head->i_flags & BLOCK_FLAG_PRIVATE_AUD) )
{
block_t *p_au = p_sys->leading.p_head;
p_sys->leading.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->p_slice, &p_sys->pocctx, &PictureOrderCount, &tFOC, &bFOC );
unsigned i_num_clock_ts = h264_get_num_ts( p_sps, p_sys->p_slice, p_sys->i_pic_struct, tFOC, bFOC );
if( !h264_is_frames_only( p_sps ) && p_sys->i_pic_struct != UINT8_MAX )
{
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 |= h264_slice_top_field(p_sys->p_slice) ? 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_TICK_INVALID )
p_pic->i_dts = date_Get( &p_sys->dts );
if( h264_get_slice_type( p_sys->p_slice ) == H264_SLICE_TYPE_I )
p_sys->prevdatedpoc.pts = VLC_TICK_INVALID;
if( p_pic->i_pts == VLC_TICK_INVALID )
{
if( p_sys->prevdatedpoc.pts != VLC_TICK_INVALID &&
date_Get( &p_sys->dts ) != VLC_TICK_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 );
/* non monotonically increasing dts on some videos 33333 33333...35000 */
if( p_pic->i_pts < p_pic->i_dts )
p_pic->i_pts = p_pic->i_dts;
}
/* In case there's no PTS at all */
else if( h264_CanSwapPTSWithDTS( p_sys->p_slice, p_sps ) )
{
p_pic->i_pts = p_pic->i_dts;
}
else if( h264_get_slice_type( p_sys->p_slice ) == H264_SLICE_TYPE_I &&
date_Get( &p_sys->dts ) != VLC_TICK_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 );
}
}
else if( p_pic->i_dts == VLC_TICK_INVALID &&
h264_CanSwapPTSWithDTS( p_sys->p_slice, p_sps ) )
{
p_pic->i_dts = p_pic->i_pts;
if( date_Get( &p_sys->dts ) == VLC_TICK_INVALID )
date_Set( &p_sys->dts, p_pic->i_pts );
}
if( p_pic->i_pts != VLC_TICK_INVALID )
{
p_sys->prevdatedpoc.pts = p_pic->i_pts;
p_sys->prevdatedpoc.num = PictureOrderCount;
}
if( p_pic->i_length == 0 )
{
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 %ld pts %ld len %ld",
tFOC, bFOC, PictureOrderCount,
h264_get_slice_type(p_sys->p_slice), p_sys->b_recovered, p_pic->i_flags,
h264_get_nal_ref_idc(p_sys->p_slice), h264_get_frame_num(p_sys->p_slice),
h264_is_field_pic(p_sys->p_slice),
p_pic->i_pts - p_pic->i_dts, p_pic->i_pts % VLC_TICK_FROM_SEC(100), p_pic->i_length);
#endif
/* save for next pic fixups */
if( date_Get( &p_sys->dts ) != VLC_TICK_INVALID )
{
if( p_sys->i_next_block_flags & BLOCK_FLAG_DISCONTINUITY )
date_Set( &p_sys->dts, VLC_TICK_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( h264_get_slice_type( p_sys->p_slice ) )
{
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;
default:
break;
}
if( !p_sys->b_recovered )
{
if( p_sys->i_recoveryfnum != UINT_MAX ) /* recovering from SEI */
p_pic->i_flags |= BLOCK_FLAG_PREROLL;
else
p_pic->i_flags |= BLOCK_FLAG_DROP;
}
p_pic->i_flags &= ~BLOCK_FLAG_PRIVATE_AUD;
/* reset after output */
ResetOutputVariables( p_sys );
/* CC */
cc_storage_commit( p_sys->p_ccs, p_pic );
return p_pic;
}
static int CmpXPS( const block_t *p_ref, const block_t *p_nal )
{
return p_ref == NULL ||
p_ref->i_buffer != p_nal->i_buffer ||
memcmp( p_ref->p_buffer, p_nal->p_buffer, p_nal->i_buffer );
}
#define wrap_h264_xps_decode(funcname ) \
static void *funcname ## _wrapper ( const uint8_t *a, size_t b, bool c ) \
{ return funcname(a,b,c); }
wrap_h264_xps_decode(h264_decode_sps)
wrap_h264_xps_decode(h264_decode_pps)
#define wrap_h264_xps_release(funcname, typecast) \
static void funcname ## _wrapper ( void *a ) { funcname((typecast *)a); }
wrap_h264_xps_release(h264_release_sps, h264_sequence_parameter_set_t)
wrap_h264_xps_release(h264_release_pps, h264_picture_parameter_set_t)
static void ReleaseXPS( decoder_sys_t *p_sys )
{
for( int i = 0; i <= H264_SPS_ID_MAX; i++ )
{
if( !p_sys->sps[i].p_block )
continue;
block_Release( p_sys->sps[i].p_block );
h264_release_sps( p_sys->sps[i].p_sps );
}
for( int i = 0; i <= H264_PPS_ID_MAX; i++ )
{
if( !p_sys->pps[i].p_block )
continue;
block_Release( p_sys->pps[i].p_block );
h264_release_pps( p_sys->pps[i].p_pps );
}
for( int i = 0; i <= H264_SPSEXT_ID_MAX; i++ )
{
if( p_sys->spsext[i].p_block )
block_Release( p_sys->spsext[i].p_block );
}
p_sys->p_active_sps = NULL;
p_sys->p_active_pps = NULL;
}
static bool PutXPS( decoder_t *p_dec, uint8_t i_nal_type, block_t *p_frag )
{
decoder_sys_t *p_sys = p_dec->p_sys;
uint8_t i_id;
if( !hxxx_strip_AnnexB_startcode( (const uint8_t **)&p_frag->p_buffer,
&p_frag->i_buffer ) ||
!h264_get_xps_id( p_frag->p_buffer, p_frag->i_buffer, &i_id ) )
{
block_Release( p_frag );
return false;
}
const char * rgsz_types[3] = {"SPS", "PPS", "SPSEXT"};
const char *psz_type;
block_t **pp_block_dst;
/* all depend on pp_xps_dst */
void **pp_xps_dst = NULL;
const void **pp_active = NULL; /* optional */
void * (* pf_decode_xps)(const uint8_t *, size_t, bool) = NULL;
void (* pf_release_xps)(void *) = NULL;
switch( i_nal_type )
{
case H264_NAL_SPS:
psz_type = rgsz_types[0];
pp_active = (const void **) &p_sys->p_active_sps;
pp_block_dst = &p_sys->sps[i_id].p_block;
pp_xps_dst = (void **) &p_sys->sps[i_id].p_sps;
pf_decode_xps = h264_decode_sps_wrapper;
pf_release_xps = h264_release_sps_wrapper;
break;
case H264_NAL_PPS:
psz_type = rgsz_types[1];
pp_active = (const void **) &p_sys->p_active_pps;
pp_block_dst = &p_sys->pps[i_id].p_block;
pp_xps_dst = (void **) &p_sys->pps[i_id].p_pps;
pf_decode_xps = h264_decode_pps_wrapper;
pf_release_xps = h264_release_pps_wrapper;
break;
case H264_NAL_SPS_EXT:
psz_type = rgsz_types[2];
pp_block_dst = &p_sys->spsext[i_id].p_block;
break;
default:
block_Release( p_frag );
return false;
}
if( !CmpXPS( *pp_block_dst, p_frag ) )
{
block_Release( p_frag );
return false;
}
msg_Dbg( p_dec, "found NAL_%s (id=%" PRIu8 ")", psz_type, i_id );
if( pp_xps_dst != NULL )
{
void *p_xps = pf_decode_xps( p_frag->p_buffer, p_frag->i_buffer, true );
if( !p_xps )
{
block_Release( p_frag );
return false;
}
if( *pp_xps_dst )
{
if( pp_active && *pp_active == *pp_xps_dst )
*pp_active = NULL;
pf_release_xps( *pp_xps_dst );
}
*pp_xps_dst = p_xps;
}
if( *pp_block_dst )
block_Release( *pp_block_dst );
*pp_block_dst = p_frag;
return true;
}
static void GetSPSPPS( uint8_t i_pps_id, void *priv,
const h264_sequence_parameter_set_t **pp_sps,
const h264_picture_parameter_set_t **pp_pps )
{
decoder_sys_t *p_sys = priv;
*pp_pps = p_sys->pps[i_pps_id].p_pps;
if( *pp_pps == NULL )
*pp_sps = NULL;
else
*pp_sps = p_sys->sps[h264_get_pps_sps_id(*pp_pps)].p_sps;
}
static h264_slice_t * ParseSliceHeader( decoder_t *p_dec, const block_t *p_frag )
{
decoder_sys_t *p_sys = p_dec->p_sys;
const uint8_t *p_stripped = p_frag->p_buffer;
size_t i_stripped = p_frag->i_buffer;
if( !hxxx_strip_AnnexB_startcode( &p_stripped, &i_stripped ) || i_stripped < 2 )
return NULL;
h264_slice_t *p_slice = h264_decode_slice( p_stripped, i_stripped, GetSPSPPS, p_sys );
if( !p_slice )
return NULL;
const h264_sequence_parameter_set_t *p_sps;
const h264_picture_parameter_set_t *p_pps;
GetSPSPPS( h264_get_slice_pps_id( p_slice ), p_sys, &p_sps, &p_pps );
if( unlikely( !p_sps || !p_pps) )
{
h264_slice_release( p_slice );
return NULL;
}
ActivateSets( p_dec, p_sps, p_pps );
return p_slice;
}
static bool ParseSeiCallback( const hxxx_sei_data_t *p_sei_data, void *cbdata )
{
decoder_t *p_dec = (decoder_t *) cbdata;
decoder_sys_t *p_sys = p_dec->p_sys;
switch( p_sei_data->i_type )
{
/* Look for pic timing */
case HXXX_SEI_PIC_TIMING:
{
const h264_sequence_parameter_set_t *p_sps = p_sys->p_active_sps;
if( unlikely( p_sps == NULL ) )
{
assert( p_sps );
break;
}
h264_decode_sei_pic_timing( p_sei_data->p_bs, p_sps,
&p_sys->i_pic_struct,
&p_sys->i_dpb_output_delay );
} break;
/* Look for user_data_registered_itu_t_t35 */
case HXXX_SEI_USER_DATA_REGISTERED_ITU_T_T35:
{
if( p_sei_data->itu_t35.type == HXXX_ITU_T35_TYPE_CC )
{
cc_storage_append( p_sys->p_ccs, true, p_sei_data->itu_t35.u.cc.p_data,
p_sei_data->itu_t35.u.cc.i_data );
}
} break;
case HXXX_SEI_FRAME_PACKING_ARRANGEMENT:
{
if( p_dec->fmt_in->video.multiview_mode == MULTIVIEW_2D )
{
video_multiview_mode_t mode;
switch( p_sei_data->frame_packing.type )
{
case FRAME_PACKING_INTERLEAVED_CHECKERBOARD:
mode = MULTIVIEW_STEREO_CHECKERBOARD; break;
case FRAME_PACKING_INTERLEAVED_COLUMN:
mode = MULTIVIEW_STEREO_COL; break;
case FRAME_PACKING_INTERLEAVED_ROW:
mode = MULTIVIEW_STEREO_ROW; break;
case FRAME_PACKING_SIDE_BY_SIDE:
mode = MULTIVIEW_STEREO_SBS; break;
case FRAME_PACKING_TOP_BOTTOM:
mode = MULTIVIEW_STEREO_TB; break;
case FRAME_PACKING_TEMPORAL:
mode = MULTIVIEW_STEREO_FRAME; break;
case FRAME_PACKING_TILED:
default:
mode = MULTIVIEW_2D; break;
}
p_dec->fmt_out.video.multiview_mode = mode;
}
} break;
/* Look for SEI recovery point */
case HXXX_SEI_RECOVERY_POINT:
{
h264_sei_recovery_point_t reco;
if( !p_sys->b_recovered &&
h264_decode_sei_recovery_point( p_sei_data->p_bs, &reco ) )
{
msg_Dbg( p_dec, "Seen SEI recovery point, %u recovery frames", reco.i_frames );
p_sys->i_recovery_frame_cnt = reco.i_frames;
}
} break;
default:
/* Will skip */
break;
}
return true;
}