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ts.c
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ts.c
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/*****************************************************************************
* ts.c: MPEG-II TS Muxer
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
* $Id: ts.c,v 1.26 2003/08/10 14:23:15 gbazin Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Eric Petit <titer@videolan.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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <vlc/vlc.h>
#include <vlc/input.h>
#include <vlc/sout.h>
#include "codecs.h"
#include "bits.h"
#include "pes.h"
#if defined MODULE_NAME_IS_mux_ts_dvbpsi
# ifdef HAVE_DVBPSI_DR_H
# include <dvbpsi/dvbpsi.h>
# include <dvbpsi/descriptor.h>
# include <dvbpsi/pat.h>
# include <dvbpsi/pmt.h>
# include <dvbpsi/dr.h>
# include <dvbpsi/psi.h>
# else
# include "dvbpsi.h"
# include "descriptor.h"
# include "tables/pat.h"
# include "tables/pmt.h"
# include "descriptors/dr.h"
# include "psi.h"
# endif
#endif
/*
* TODO:
* - check PCR frequency requirement
* - check PAT/PMT " "
* - check PCR/PCR "soft"
*
* - remove creation of PAT/PMT without dvbpsi
* - ?
* FIXME:
* - subtitle support is far from perfect. I expect some subtitles drop
* if they arrive a bit late
* (We cannot rely on the fact that the fifo should be full)
*/
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
vlc_module_begin();
#if defined MODULE_NAME_IS_mux_ts
set_description( _("TS muxer") );
set_capability( "sout mux", 100 );
add_shortcut( "ts" );
add_shortcut( "ts_nodvbpsi" );
#elif defined MODULE_NAME_IS_mux_ts_dvbpsi
set_description( _("TS muxer (libdvbpsi)") );
set_capability( "sout mux", 120 );
add_shortcut( "ts" );
add_shortcut( "ts_dvbpsi" );
#endif
set_callbacks( Open, Close );
vlc_module_end();
/*****************************************************************************
* Exported prototypes
*****************************************************************************/
static int Capability(sout_mux_t *, int, void *, void * );
static int AddStream( sout_mux_t *, sout_input_t * );
static int DelStream( sout_mux_t *, sout_input_t * );
static int Mux ( sout_mux_t * );
/*****************************************************************************
* Local prototypes
*****************************************************************************/
#define SOUT_BUFFER_FLAGS_PRIVATE_PCR_SOFT ( 1 << SOUT_BUFFER_FLAGS_PRIVATE_SHIFT )
typedef struct
{
int i_depth;
sout_buffer_t *p_first;
sout_buffer_t **pp_last;
} sout_buffer_chain_t;
static inline void BufferChainInit ( sout_buffer_chain_t *c )
{
c->i_depth = 0;
c->p_first = NULL;
c->pp_last = &c->p_first;
}
static inline void BufferChainAppend( sout_buffer_chain_t *c, sout_buffer_t *b )
{
*c->pp_last = b;
c->i_depth++;
while( b->p_next )
{
b = b->p_next;
c->i_depth++;
}
c->pp_last = &b->p_next;
}
static inline sout_buffer_t *BufferChainGet( sout_buffer_chain_t *c )
{
sout_buffer_t *b = c->p_first;
if( b )
{
c->i_depth--;
c->p_first = b->p_next;
if( c->p_first == NULL )
{
c->pp_last = &c->p_first;
}
b->p_next = NULL;
}
return b;
}
typedef struct ts_stream_s
{
int i_pid;
int i_stream_type;
int i_stream_id;
int i_continuity_counter;
/* to be used for carriege of DIV3 */
vlc_fourcc_t i_bih_codec;
int i_bih_width, i_bih_height;
/* Specific to mpeg4 in mpeg2ts */
int i_es_id;
int i_decoder_specific_info;
uint8_t *p_decoder_specific_info;
/* for TS building */
sout_buffer_chain_t chain_ts;
} ts_stream_t;
struct sout_mux_sys_t
{
int i_pcr_pid;
sout_input_t *p_pcr_input;
int i_stream_id_mpga;
int i_stream_id_mpgv;
int i_stream_id_a52;
int i_audio_bound;
int i_video_bound;
int i_pid_free; // first usable pid
int i_pat_version_number;
ts_stream_t pat;
int i_pmt_version_number;
ts_stream_t pmt; // Up to now only one program
int i_mpeg4_streams;
int i_null_continuity_counter; /* Needed ? */
/* for TS building */
int64_t i_bitrate_min;
int64_t i_bitrate_max;
int64_t i_pcr_delay;
int64_t i_pcr_soft_delay;
mtime_t i_pcr; /* last PCR emited (for pcr-soft) */
mtime_t i_dts;
mtime_t i_length;
sout_buffer_chain_t chain_ts;
};
/* Reserve a pid and return it */
static int AllocatePID( sout_mux_sys_t *p_sys )
{
return( ++p_sys->i_pid_free );
}
static void GetPAT( sout_mux_t *p_mux, sout_buffer_chain_t *c );
static void GetPMT( sout_mux_t *p_mux, sout_buffer_chain_t *c );
static int TSFill ( sout_mux_t *, sout_input_t * );
static void PEStoTS ( sout_instance_t *, sout_buffer_chain_t *, sout_buffer_t *, ts_stream_t *, vlc_bool_t );
static void TSSetDate( sout_buffer_chain_t *, mtime_t, mtime_t );
static void TSSetConstraints( sout_mux_t*, sout_buffer_chain_t *,
mtime_t i_length, int i_bitrate_min, int i_bitrate_max );
#if !defined( HAVE_ATOLL )
/* Et oui y'a des systemes de MERDE (ex: OS X, Solaris) qui ne l'ont pas :((( */
static long long atoll(const char *str)
{
long long i_value = 0;
int sign = 1;
if( *str == '-' )
{
sign = -1;
}
while( *str >= '0' && *str <= '9' )
{
i_value = i_value * 10 + ( *str - '0' );
}
return i_value * sign;
}
#endif
/*****************************************************************************
* Open:
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
sout_mux_t *p_mux =(sout_mux_t*)p_this;
sout_mux_sys_t *p_sys;
char *val;
msg_Dbg( p_mux, "Open" );
p_sys = malloc( sizeof( sout_mux_sys_t ) );
p_mux->pf_capacity = Capability;
p_mux->pf_addstream = AddStream;
p_mux->pf_delstream = DelStream;
p_mux->pf_mux = Mux;
p_mux->p_sys = p_sys;
p_mux->i_preheader = 30; // really enough for a pes header
srand( (uint32_t)mdate() );
p_sys->i_stream_id_mpga = 0xc0;
p_sys->i_stream_id_a52 = 0x80;
p_sys->i_stream_id_mpgv = 0xe0;
p_sys->i_audio_bound = 0;
p_sys->i_video_bound = 0;
p_sys->i_pat_version_number = rand() % 32;
p_sys->pat.i_pid = 0;
p_sys->pat.i_continuity_counter = 0;
p_sys->i_pmt_version_number = rand() % 32;
p_sys->pmt.i_pid = 0x42;
p_sys->pmt.i_continuity_counter = 0;
p_sys->i_pid_free = 0x43;
p_sys->i_pcr_pid = 0x1fff;
p_sys->p_pcr_input = NULL;
p_sys->i_mpeg4_streams = 0;
p_sys->i_null_continuity_counter = 0;
/* Allow to create constrained stream */
p_sys->i_bitrate_min = 0;
p_sys->i_bitrate_max = 0;
if( ( val = sout_cfg_find_value( p_mux->p_cfg, "bmin" ) ) )
{
p_sys->i_bitrate_min = atoll( val );
}
if( ( val = sout_cfg_find_value( p_mux->p_cfg, "bmax" ) ) )
{
p_sys->i_bitrate_max = atoll( val );
}
if( p_sys->i_bitrate_min > 0 && p_sys->i_bitrate_max > 0 &&
p_sys->i_bitrate_min > p_sys->i_bitrate_max )
{
msg_Err( p_mux, "incompatible minimum and maximum bitrate, "
"disabling bitrate control" );
p_sys->i_bitrate_min = 0;
p_sys->i_bitrate_max = 0;
}
p_sys->i_pcr_delay = 100000;
if( ( val = sout_cfg_find_value( p_mux->p_cfg, "pcr" ) ) )
{
p_sys->i_pcr_delay = (int64_t)atoi( val ) * 1000;
if( p_sys->i_pcr_delay <= 0 )
{
msg_Err( p_mux,
"invalid pcr delay ("I64Fd"ms) reseting to 100ms",
p_sys->i_pcr_delay / 1000 );
p_sys->i_pcr_delay = 100000;
}
}
p_sys->i_pcr_soft_delay = 0;
if( ( val = sout_cfg_find_value( p_mux->p_cfg, "pcr-soft" ) ) )
{
p_sys->i_pcr_soft_delay = (int64_t)atoi( val ) * 1000;
if( p_sys->i_pcr_soft_delay <= 0 ||
p_sys->i_pcr_soft_delay >= p_sys->i_pcr_delay )
{
msg_Err( p_mux,
"invalid pcr-soft delay ("I64Fd"ms) disabled",
p_sys->i_pcr_soft_delay / 1000 );
p_sys->i_pcr_soft_delay = 0;
}
}
msg_Dbg( p_mux, "pcr_delay="I64Fd" pcr_soft_delay="I64Fd,
p_sys->i_pcr_delay, p_sys->i_pcr_soft_delay );
/* for TS génération */
p_sys->i_pcr = 0;
p_sys->i_dts = 0;
p_sys->i_length = 0;
BufferChainInit( &p_sys->chain_ts );
return VLC_SUCCESS;
}
/*****************************************************************************
* Close:
*****************************************************************************/
static void Close( vlc_object_t * p_this )
{
sout_mux_t *p_mux = (sout_mux_t*)p_this;
sout_mux_sys_t *p_sys = p_mux->p_sys;
sout_buffer_t *p_data;
msg_Dbg( p_mux, "Close" );
/* Empty TS buffer */
while( ( p_data = BufferChainGet( &p_sys->chain_ts ) ) )
{
sout_BufferDelete( p_mux->p_sout, p_data );
}
free( p_sys );
}
/*****************************************************************************
* Capability:
*****************************************************************************/
static int Capability( sout_mux_t *p_mux, int i_query, void *p_args, void *p_answer )
{
switch( i_query )
{
case SOUT_MUX_CAP_GET_ADD_STREAM_ANY_TIME:
*(vlc_bool_t*)p_answer = VLC_TRUE;
return( SOUT_MUX_CAP_ERR_OK );
default:
return( SOUT_MUX_CAP_ERR_UNIMPLEMENTED );
}
}
/*****************************************************************************
* AddStream: called for each stream addition
*****************************************************************************/
static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
ts_stream_t *p_stream;
msg_Dbg( p_mux, "adding input codec=%4.4s", (char*)&p_input->p_fmt->i_fourcc );
p_input->p_sys = (void*)p_stream = malloc( sizeof( ts_stream_t ) );
/* Init this new stream */
p_stream->i_pid = AllocatePID( p_sys );
p_stream->i_continuity_counter = 0;
p_stream->i_decoder_specific_info = 0;
p_stream->p_decoder_specific_info = NULL;
/* All others fields depand on codec */
switch( p_input->p_fmt->i_cat )
{
case VIDEO_ES:
switch( p_input->p_fmt->i_fourcc )
{
case VLC_FOURCC( 'm', 'p','g', 'v' ):
/* TODO: do we need to check MPEG-I/II ? */
p_stream->i_stream_type = 0x02;
p_stream->i_stream_id = p_sys->i_stream_id_mpgv;
p_sys->i_stream_id_mpgv++;
break;
case VLC_FOURCC( 'm', 'p','4', 'v' ):
p_stream->i_stream_type = 0x10;
p_stream->i_stream_id = 0xfa;
p_sys->i_mpeg4_streams++;
p_stream->i_es_id = p_stream->i_pid;
break;
/* XXX dirty dirty but somebody want that : using crapy MS-codec XXX */
/* I didn't want to do that :P */
case VLC_FOURCC( 'H', '2', '6', '3' ):
case VLC_FOURCC( 'I', '2', '6', '3' ):
case VLC_FOURCC( 'W', 'M', 'V', '2' ):
case VLC_FOURCC( 'W', 'M', 'V', '1' ):
case VLC_FOURCC( 'D', 'I', 'V', '3' ):
case VLC_FOURCC( 'D', 'I', 'V', '2' ):
case VLC_FOURCC( 'D', 'I', 'V', '1' ):
case VLC_FOURCC( 'M', 'J', 'P', 'G' ):
p_stream->i_stream_type = 0xa0; // private
p_stream->i_stream_id = 0xa0; // beurk
p_stream->i_bih_codec = p_input->p_fmt->i_fourcc;
p_stream->i_bih_width = p_input->p_fmt->i_width;
p_stream->i_bih_height = p_input->p_fmt->i_height;
break;
default:
free( p_stream );
return VLC_EGENERIC;
}
p_sys->i_video_bound++;
break;
case AUDIO_ES:
switch( p_input->p_fmt->i_fourcc )
{
case VLC_FOURCC( 'm', 'p','g', 'a' ):
p_stream->i_stream_type = p_input->p_fmt->i_sample_rate >= 32000 ? 0x03 : 0x04;
p_stream->i_stream_id = p_sys->i_stream_id_mpga;
p_sys->i_stream_id_mpga++;
break;
case VLC_FOURCC( 'a', '5','2', ' ' ):
p_stream->i_stream_type = 0x81;
p_stream->i_stream_id = p_sys->i_stream_id_a52;
p_sys->i_stream_id_a52++;
break;
case VLC_FOURCC( 'm', 'p','4', 'a' ):
p_stream->i_stream_type = 0x11;
p_stream->i_stream_id = 0xfa;
p_sys->i_mpeg4_streams++;
p_stream->i_es_id = p_stream->i_pid;
break;
default:
free( p_stream );
return VLC_EGENERIC;
}
p_sys->i_audio_bound++;
break;
case SPU_ES:
switch( p_input->p_fmt->i_fourcc )
{
case VLC_FOURCC( 's', 'p','u', ' ' ):
p_stream->i_stream_type = 0x82;
p_stream->i_stream_id = 0x82;
break;
default:
free( p_stream );
return VLC_EGENERIC;
}
break;
default:
free( p_stream );
return VLC_EGENERIC;
}
/* Copy extra data (VOL for MPEG-4 and extra BitMapInfoHeader for VFW */
p_stream->i_decoder_specific_info = p_input->p_fmt->i_extra_data;
if( p_stream->i_decoder_specific_info > 0 )
{
p_stream->p_decoder_specific_info =
malloc( p_stream->i_decoder_specific_info );
memcpy( p_stream->p_decoder_specific_info,
p_input->p_fmt->p_extra_data,
p_input->p_fmt->i_extra_data );
}
/* Init chain for TS building */
BufferChainInit( &p_stream->chain_ts );
/* We only change PMT version (PAT isn't changed) */
p_sys->i_pmt_version_number = ( p_sys->i_pmt_version_number + 1 )%32;
/* Update pcr_pid */
if( p_input->p_fmt->i_cat != SPU_ES &&
( p_sys->i_pcr_pid == 0x1fff || p_input->p_fmt->i_cat == VIDEO_ES ) )
{
sout_buffer_t *p_data;
if( p_sys->p_pcr_input )
{
/* There was already a PCR stream, so clean context */
ts_stream_t *p_pcr_stream = (ts_stream_t*)p_sys->p_pcr_input->p_sys;
while( ( p_data = BufferChainGet( &p_pcr_stream->chain_ts ) ) )
{
sout_BufferDelete( p_mux->p_sout, p_data );
}
}
p_sys->i_pcr_pid = p_stream->i_pid;
p_sys->p_pcr_input = p_input;
/* Empty TS buffer (avoid broken data/problems with pcr stream changement ) */
while( ( p_data = BufferChainGet( &p_sys->chain_ts ) ) )
{
sout_BufferDelete( p_mux->p_sout, p_data );
}
}
return VLC_SUCCESS;
}
/*****************************************************************************
* DelStream: called before a stream deletion
*****************************************************************************/
static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
ts_stream_t *p_stream;
sout_buffer_t *p_data;
msg_Dbg( p_mux, "removing input" );
p_stream = (ts_stream_t*)p_input->p_sys;
if( p_sys->i_pcr_pid == p_stream->i_pid )
{
int i;
/* Find a new pcr stream (Prefer Video Stream) */
p_sys->i_pcr_pid = 0x1fff;
p_sys->p_pcr_input = NULL;
for( i = 0; i < p_mux->i_nb_inputs; i++ )
{
if( p_mux->pp_inputs[i] == p_input )
{
continue;
}
if( p_mux->pp_inputs[i]->p_fmt->i_cat == VIDEO_ES )
{
p_sys->i_pcr_pid =
((ts_stream_t*)p_mux->pp_inputs[i]->p_sys)->i_pid;
p_sys->p_pcr_input= p_mux->pp_inputs[i];
break;
}
else if( p_mux->pp_inputs[i]->p_fmt->i_cat != SPU_ES &&
p_sys->i_pcr_pid == 0x1fff )
{
p_sys->i_pcr_pid =
((ts_stream_t*)p_mux->pp_inputs[i]->p_sys)->i_pid;
p_sys->p_pcr_input= p_mux->pp_inputs[i];
}
}
if( p_sys->p_pcr_input )
{
/* Empty TS buffer */
while( ( p_data = BufferChainGet( &((ts_stream_t*)p_sys->p_pcr_input->p_sys)->chain_ts ) ) )
{
sout_BufferDelete( p_mux->p_sout, p_data );
}
}
}
/* Empty all data in chain_ts */
while( ( p_data = BufferChainGet( &p_stream->chain_ts ) ) )
{
sout_BufferDelete( p_mux->p_sout, p_data );
}
if( p_stream->p_decoder_specific_info )
{
free( p_stream->p_decoder_specific_info );
}
if( p_stream->i_stream_id == 0xfa || p_stream->i_stream_id == 0xfb )
{
p_sys->i_mpeg4_streams--;
}
free( p_stream );
/* We only change PMT version (PAT isn't changed) */
p_sys->i_pmt_version_number++; p_sys->i_pmt_version_number %= 32;
/*Empty TS buffer (avoid broken data/problems with pcr stream changement) */
while( ( p_data = BufferChainGet( &p_sys->chain_ts ) ) )
{
sout_BufferDelete( p_mux->p_sout, p_data );
}
return VLC_SUCCESS;
}
/*****************************************************************************
* Mux: Call each time there is new data for at least one stream
*****************************************************************************
*
*****************************************************************************/
static int Mux( sout_mux_t *p_mux )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
sout_input_t *p_pcr_input = p_sys->p_pcr_input;
ts_stream_t *p_pcr_stream = (ts_stream_t*)p_sys->p_pcr_input->p_sys;
if( p_sys->i_pcr_pid == 0x1fff )
{
msg_Dbg( p_mux, "waiting PCR streams" );
msleep( 1000 );
return VLC_SUCCESS;
}
for( ;; )
{
ts_stream_t *p_stream = NULL;
sout_buffer_t *p_data;
int i_stream, i;
mtime_t i_dts;
/* fill ts packets for pcr XXX before GetPAT/GetPMT */
if( p_pcr_stream->chain_ts.p_first == NULL && TSFill( p_mux, p_pcr_input ) )
{
/* We need more data */
return VLC_SUCCESS;
}
if( p_sys->chain_ts.p_first == NULL )
{
/* Every pcr packet send PAT/PMT */
GetPAT( p_mux, &p_sys->chain_ts);
GetPMT( p_mux, &p_sys->chain_ts );
}
/* search stream with lowest dts */
for( i = 0, i_stream = -1, i_dts = 0; i < p_mux->i_nb_inputs; i++ )
{
p_stream = (ts_stream_t*)p_mux->pp_inputs[i]->p_sys;
if( p_stream->chain_ts.p_first == NULL )
{
if( TSFill( p_mux, p_mux->pp_inputs[i] ) )
{
/* We need more data */
return VLC_SUCCESS;
}
if( p_stream->chain_ts.p_first == NULL )
{
continue; /* SPU_ES */
}
}
if( i_stream == -1 ||
p_stream->chain_ts.p_first->i_dts < i_dts )
{
i_stream = i;
i_dts = p_stream->chain_ts.p_first->i_dts;
}
}
p_stream = (ts_stream_t*)p_mux->pp_inputs[i_stream]->p_sys;
p_data = BufferChainGet( &p_stream->chain_ts );
BufferChainAppend( &p_sys->chain_ts, p_data );
if( p_stream->i_pid == p_pcr_stream->i_pid && p_stream->chain_ts.p_first == NULL )
{
sout_buffer_t *p_ts = p_sys->chain_ts.p_first;
/* We have consume all TS packets from the PCR stream */
if( p_sys->i_length > p_sys->i_pcr_delay )
{
/* Send TS data if last PCR was i_pcr_delay ago */
if( p_sys->i_bitrate_min > 0 ||
p_sys->i_bitrate_max > 0 )
{
TSSetConstraints( p_mux, &p_sys->chain_ts, p_sys->i_length,
p_sys->i_bitrate_min, p_sys->i_bitrate_max );
}
/* Send all data */
TSSetDate( &p_sys->chain_ts,
p_sys->i_dts + 3 * p_sys->i_pcr_delay / 2, /* latency is equal to i_pcr_delay, 3/2 is for security */
p_sys->i_length );
sout_AccessOutWrite( p_mux->p_access, p_ts );
/* Reset the ts chain */
BufferChainInit( &p_sys->chain_ts );
p_sys->i_length = 0;
}
}
}
return VLC_SUCCESS;
}
/*****************************************************************************
*
*
*****************************************************************************/
static int TSFill( sout_mux_t *p_mux, sout_input_t *p_input )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
ts_stream_t *p_pcr_stream = (ts_stream_t*)p_sys->p_pcr_input->p_sys;
ts_stream_t *p_stream = (ts_stream_t*)p_input->p_sys;
mtime_t i_dts, i_length;
sout_buffer_t *p_data;
vlc_bool_t b_pcr = VLC_FALSE;
vlc_bool_t b_pcr_soft = VLC_FALSE;
for( ;; )
{
if( p_input->p_fifo->i_depth <= 0 )
{
if( p_input->p_fmt->i_cat == AUDIO_ES ||
p_input->p_fmt->i_cat == VIDEO_ES )
{
/* We need more data */
return VLC_EGENERIC;
}
else
{
return VLC_SUCCESS;
}
}
p_data = sout_FifoGet( p_input->p_fifo );
i_dts = p_data->i_dts;
i_length = p_data->i_length;
if( p_stream->i_pid == p_pcr_stream->i_pid &&
p_stream->chain_ts.p_first == NULL )
{
p_sys->i_length+= i_length;
if( p_sys->chain_ts.p_first == NULL )
{
p_sys->i_dts = i_dts;
p_sys->i_pcr = i_dts;
b_pcr = VLC_TRUE;
}
else if( p_sys->i_pcr_soft_delay > 0 &&
p_sys->i_pcr + p_sys->i_pcr_soft_delay < i_dts )
{
p_sys->i_pcr = i_dts;
b_pcr = VLC_TRUE;
b_pcr_soft = VLC_TRUE;
}
break;
}
if( ( p_sys->i_dts + p_sys->i_length ) - i_dts > 2000000 ||
( p_sys->i_dts + p_sys->i_length ) - i_dts < -2000000 )
{
msg_Err( p_mux, "| buffer_dts - pcr_pts | > 2s ("I64Fd") empting "
"pcr TS buffers", p_sys->i_dts + p_sys->i_length - i_dts);
sout_BufferDelete( p_mux->p_sout, p_data );
while( ( p_data = BufferChainGet( &p_pcr_stream->chain_ts ) ) )
{
sout_BufferDelete( p_mux->p_sout, p_data );
}
while( ( p_data = BufferChainGet( &p_sys->chain_ts ) ) )
{
sout_BufferDelete( p_mux->p_sout, p_data );
}
return VLC_EGENERIC;
}
if( i_dts >= p_sys->i_dts )
{
break;
}
msg_Dbg( p_mux, "dropping buffer size=%d dts="I64Fd" pcr_dts="I64Fd
" diff="I64Fd, p_data->i_size, i_dts, p_sys->i_dts,
p_sys->i_dts + p_sys->i_length - i_dts );
sout_BufferDelete( p_mux->p_sout, p_data );
}
E_( EStoPES )( p_mux->p_sout, &p_data, p_data, p_stream->i_stream_id, 1);
BufferChainInit( &p_stream->chain_ts );
PEStoTS( p_mux->p_sout, &p_stream->chain_ts, p_data, p_stream, b_pcr );
TSSetDate( &p_stream->chain_ts, i_dts, i_length );
if( b_pcr_soft && p_stream->chain_ts.p_first )
{
p_stream->chain_ts.p_first->i_flags=SOUT_BUFFER_FLAGS_PRIVATE_PCR_SOFT;
}
return VLC_SUCCESS;
}
static void TSSetConstraints( sout_mux_t *p_mux, sout_buffer_chain_t *c, mtime_t i_length, int i_bitrate_min, int i_bitrate_max )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
sout_buffer_chain_t s = *c;
int i_packets = 0;
int i_packets_min = 0;
int i_packets_max = 0;
if( i_length <= 0 )
{
return;
}
i_packets = c->i_depth;
i_packets_min = ( (int64_t)i_bitrate_min * i_length / 8 / 1000000 + 187 ) / 188;
i_packets_max = ( (int64_t)i_bitrate_max * i_length / 8 / 1000000 + 187 ) / 188;
if( i_packets < i_packets_min && i_packets_min > 0 )
{
sout_buffer_t *p_pk;
int i_div = ( i_packets_min - i_packets ) / i_packets;
int i_mod = ( i_packets_min - i_packets ) % i_packets;
int i_rest = 0;
/* We need to pad with null packets (pid=0x1fff)
* We try to melt null packets with true packets */
msg_Dbg( p_mux,
"packets=%d but min=%d -> adding %d packets of padding",
i_packets, i_packets_min, i_packets_min - i_packets );
BufferChainInit( c );
while( ( p_pk = BufferChainGet( &s ) ) )
{
int i, i_null;
BufferChainAppend( c, p_pk );
i_null = i_div + ( i_rest + i_mod ) / i_packets;
for( i = 0; i < i_null; i++ )
{
sout_buffer_t *p_null;
p_null = sout_BufferNew( p_mux->p_sout, 188 );
p_null->p_buffer[0] = 0x47;
p_null->p_buffer[1] = 0x1f;
p_null->p_buffer[2] = 0xff;
p_null->p_buffer[3] = 0x10 | p_sys->i_null_continuity_counter;
memset( &p_null->p_buffer[4], 0, 184 );
p_sys->i_null_continuity_counter =
( p_sys->i_null_continuity_counter + 1 ) % 16;
BufferChainAppend( c, p_null );
}
i_rest = ( i_rest + i_mod ) % i_packets;
}
}
else if( i_packets > i_packets_max && i_packets_max > 0 )
{
sout_buffer_t *p_pk;
int i;
/* Arg, we need to drop packets, I don't do something clever (like
* dropping complete pid, b frames, ... ), I just get the right amount
* of packets and discard the others */
msg_Warn( p_mux,
"packets=%d but max=%d -> removing %d packets -> stream broken",
i_packets, i_packets_max, i_packets - i_packets_max );
BufferChainInit( c );
for( i = 0; i < i_packets_max; i++ )
{
BufferChainAppend( c, BufferChainGet( &s ) );
}
while( ( p_pk = BufferChainGet( &s ) ) )
{
sout_BufferDelete( p_mux->p_sout, p_pk );
}
}
}
static void TSSetDate( sout_buffer_chain_t *c, mtime_t i_dts, mtime_t i_length )
{
sout_buffer_t *p_ts;
mtime_t i_delta = i_length / c->i_depth;
int i_packet = 0;
for( p_ts = c->p_first; p_ts != NULL; p_ts = p_ts->p_next )
{
p_ts->i_dts = i_dts + i_packet * i_length / c->i_depth; /* avoid rounding error */
p_ts->i_length = i_delta;
if( p_ts->i_flags&SOUT_BUFFER_FLAGS_PRIVATE_PCR_SOFT )
{
mtime_t i_pcr = 9 * p_ts->i_dts / 100;
p_ts->p_buffer[6] = ( i_pcr >> 25 )&0xff;
p_ts->p_buffer[7] = ( i_pcr >> 17 )&0xff;
p_ts->p_buffer[8] = ( i_pcr >> 9 )&0xff;
p_ts->p_buffer[9] = ( i_pcr >> 1 )&0xff;
p_ts->p_buffer[10]= ( i_pcr << 7 )&0x80;
}
i_packet++;
}
}
static void PEStoTS( sout_instance_t *p_sout,
sout_buffer_chain_t *c, sout_buffer_t *p_pes,
ts_stream_t *p_stream,
vlc_bool_t b_pcr )
{
uint8_t *p_data;
int i_size;
int b_new_pes;
/* get PES total size */
i_size = p_pes->i_size;
p_data = p_pes->p_buffer;
/* Set pcr only with valid DTS */
if( p_pes->i_dts <= 0 )
{
b_pcr = VLC_FALSE;
}
b_new_pes = VLC_TRUE;
for( ;; )
{
int b_adaptation_field;
int i_payload;
int i_copy;
sout_buffer_t *p_ts;
p_ts = sout_BufferNew( p_sout, 188 );
/* write header
* 8b 0x47 sync byte
* 1b transport_error_indicator
* 1b payload_unit_start
* 1b transport_priority
* 13b pid
* 2b transport_scrambling_control
* 2b if adaptation_field 0x03 else 0x01
* 4b continuity_counter
*/
i_payload = 184 - ( b_pcr ? 8 : 0 );
i_copy = __MIN( i_size, i_payload );
b_adaptation_field = (b_pcr||i_size<i_payload) ? VLC_TRUE : VLC_FALSE;
p_ts->p_buffer[0] = 0x47;
p_ts->p_buffer[1] = ( b_new_pes ? 0x40 : 0x00 )|
( ( p_stream->i_pid >> 8 )&0x1f );
p_ts->p_buffer[2] = p_stream->i_pid & 0xff;
p_ts->p_buffer[3] = ( b_adaptation_field ? 0x30 : 0x10 )|
p_stream->i_continuity_counter;
b_new_pes = VLC_FALSE;
p_stream->i_continuity_counter = (p_stream->i_continuity_counter+1)%16;
if( b_adaptation_field )
{
int i;
if( b_pcr )
{
mtime_t i_pcr = p_pes->i_dts * 9 / 100;
int i_stuffing = i_payload - i_copy;
p_ts->p_buffer[4] = 7 + i_stuffing;
p_ts->p_buffer[5] = 0x10; /* flags */
p_ts->p_buffer[6] = ( i_pcr >> 25 )&0xff;
p_ts->p_buffer[7] = ( i_pcr >> 17 )&0xff;
p_ts->p_buffer[8] = ( i_pcr >> 9 )&0xff;
p_ts->p_buffer[9] = ( i_pcr >> 1 )&0xff;
p_ts->p_buffer[10]= ( i_pcr << 7 )&0x80;
p_ts->p_buffer[11]= 0;
b_pcr = VLC_FALSE;
for( i = 12; i < 12 + i_stuffing; i++ )
{
p_ts->p_buffer[i] = 0xff;
}