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vlc/modules/mux/mpeg/ts.c

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/*****************************************************************************
* ts.c: MPEG-II TS Muxer
*****************************************************************************
* Copyright (C) 2001-2005 VLC authors and VideoLAN
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Eric Petit <titer@videolan.org>
* Jean-Paul Saman <jpsaman #_at_# m2x.nl>
* Wallace Wadge <wwadge #_at_# gmail.com>
*
* 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 <assert.h>
#include <limits.h>
#include <vlc_common.h>
#include <vlc_configuration.h>
#include <vlc_plugin.h>
#include <vlc_sout.h>
#include <vlc_block.h>
#include <vlc_rand.h>
#include <vlc_charset.h>
#include <vlc_iso_lang.h>
#include "bits.h"
#include "pes.h"
#include "csa.h"
#include "tsutil.h"
#include "streams.h"
# include <dvbpsi/dvbpsi.h>
# include <dvbpsi/demux.h>
# include <dvbpsi/descriptor.h>
# include <dvbpsi/pat.h>
# include <dvbpsi/pmt.h>
# include <dvbpsi/sdt.h>
# include <dvbpsi/dr.h>
# include <dvbpsi/psi.h>
#include "dvbpsi_compat.h"
#include "tables.h"
#include "../../codec/jpeg2000.h"
#include "../../demux/mpeg/timestamps.h"
/*
* TODO:
* - check PCR frequency requirement
* - check PAT/PMT " "
* - check PCR/PCR "soft"
* - check if "registration" descriptor : "AC-3" should be a program
* descriptor or an es one. (xine want an es one)
*
* - 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)
*/
/*****************************************************************************
* Callback prototypes
*****************************************************************************/
static int ChangeKeyCallback ( vlc_object_t *, char const *, vlc_value_t, vlc_value_t, void * );
static int ActiveKeyCallback ( vlc_object_t *, char const *, vlc_value_t, vlc_value_t, void * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
static const char *const ts_standards_list[] =
{ "dvb", "atsc", };
static const char *const ts_standards_list_text[] =
{ "DVB", "ATSC", };
#define STANDARD_TEXT N_("Digital TV Standard")
#define VPID_TEXT N_("Video PID")
#define VPID_LONGTEXT N_("Assign a fixed PID to the video stream. The PCR " \
"PID will automatically be the video.")
#define APID_TEXT N_("Audio PID")
#define APID_LONGTEXT N_("Assign a fixed PID to the audio stream.")
#define SPUPID_TEXT N_("SPU PID")
#define SPUPID_LONGTEXT N_("Assign a fixed PID to the SPU.")
#define PMTPID_TEXT N_("PMT PID")
#define PMTPID_LONGTEXT N_("Assign a fixed PID to the PMT")
#define TSID_TEXT N_("TS ID")
#define TSID_LONGTEXT N_("Assign a fixed Transport Stream ID.")
#define NETID_TEXT N_("NET ID")
#define NETID_LONGTEXT N_("Assign a fixed Network ID (for SDT table)")
#define PMTPROG_TEXT N_("PMT Program numbers")
#define PMTPROG_LONGTEXT N_("Assign a program number to each PMT. This " \
"requires \"Set PID to ID of ES\" to be enabled." )
#define MUXPMT_TEXT N_("Mux PMT (requires --sout-ts-es-id-pid)")
#define MUXPMT_LONGTEXT N_("Define the pids to add to each pmt. This " \
"requires \"Set PID to ID of ES\" to be enabled." )
#define SDTDESC_TEXT N_("SDT Descriptors (requires --sout-ts-es-id-pid)")
#define SDTDESC_LONGTEXT N_("Defines the descriptors of each SDT. This " \
"requires \"Set PID to ID of ES\" to be enabled." )
#define PID_TEXT N_("Set PID to ID of ES")
#define PID_LONGTEXT N_("Sets PID to the ID of the incoming ES. This is for " \
"use with --ts-es-id-pid, and allows having the same PIDs in the input " \
"and output streams.")
#define ALIGNMENT_TEXT N_("Data alignment")
#define ALIGNMENT_LONGTEXT N_("Enforces alignment of all access units on " \
"PES boundaries. Disabling this might save some bandwidth but introduce incompatibilities.")
#define SHAPING_TEXT N_("Shaping delay (ms)")
#define SHAPING_LONGTEXT N_("Cut the " \
"stream in slices of the given duration, and ensure a constant bitrate " \
"between the two boundaries. This avoids having huge bitrate peaks, " \
"especially for reference frames." )
#define KEYF_TEXT N_("Use keyframes")
#define KEYF_LONGTEXT N_("If enabled, and shaping is specified, " \
"the TS muxer will place the boundaries at the end of I pictures. In " \
"that case, the shaping duration given by the user is a worse case " \
"used when no reference frame is available. This enhances the efficiency " \
"of the shaping algorithm, since I frames are usually the biggest " \
"frames in the stream.")
#define PCR_TEXT N_("PCR interval (ms)")
#define PCR_LONGTEXT N_("Set at which interval " \
"PCRs (Program Clock Reference) will be sent (in milliseconds). " \
"This value should be below 100ms. (default is 70ms).")
#define DTS_TEXT N_("DTS delay (ms)")
#define DTS_LONGTEXT N_("Delay the DTS (decoding time " \
"stamps) and PTS (presentation timestamps) of the data in the " \
"stream, compared to the PCRs. This allows for some buffering inside " \
"the client decoder.")
#define ACRYPT_TEXT N_("Crypt audio")
#define ACRYPT_LONGTEXT N_("Crypt audio using CSA")
#define VCRYPT_TEXT N_("Crypt video")
#define VCRYPT_LONGTEXT N_("Crypt video using CSA")
#define CK_TEXT N_("CSA Key")
#define CK_LONGTEXT N_("CSA encryption key. This must be a " \
"16 char string (8 hexadecimal bytes).")
#define CK2_TEXT N_("Second CSA Key")
#define CK2_LONGTEXT N_("The even CSA encryption key. This must be a " \
"16 char string (8 hexadecimal bytes).")
#define CU_TEXT N_("CSA Key in use")
#define CU_LONGTEXT N_("CSA encryption key used. It can be the odd/first/1 " \
"(default) or the even/second/2 one.")
#define CPKT_TEXT N_("Packet size in bytes to encrypt")
#define CPKT_LONGTEXT N_("Size of the TS packet to encrypt. " \
"The encryption routines subtract the TS-header from the value before " \
"encrypting." )
#define SOUT_CFG_PREFIX "sout-ts-"
#define MAX_PMT 64 /* Maximum number of programs. FIXME: I just chose an arbitrary number. Where is the maximum in the spec? */
#define MAX_PMT_PID 64 /* Maximum pids in each pmt. FIXME: I just chose an arbitrary number. Where is the maximum in the spec? */
static_assert (MAX_SDT_DESC >= MAX_PMT, "MAX_SDT_DESC < MAX_PMT");
#define BLOCK_FLAG_NO_KEYFRAME (1 << BLOCK_FLAG_PRIVATE_SHIFT) /* This is not a key frame for bitrate shaping */
#define BLOCK_FLAG_FOR_PCR (1 << (BLOCK_FLAG_PRIVATE_SHIFT+1))
vlc_module_begin ()
set_description( N_("TS muxer (libdvbpsi)") )
set_shortname( "MPEG-TS")
set_subcategory( SUBCAT_SOUT_MUX )
set_capability( "sout mux", 120 )
add_shortcut( "ts" )
add_string( SOUT_CFG_PREFIX "standard", "dvb", STANDARD_TEXT, NULL )
change_string_list( ts_standards_list, ts_standards_list_text )
add_integer(SOUT_CFG_PREFIX "pid-video", 100, VPID_TEXT, VPID_LONGTEXT)
change_integer_range( 32, 8190 )
add_integer(SOUT_CFG_PREFIX "pid-audio", 200, APID_TEXT, APID_LONGTEXT)
change_integer_range( 32, 8190 )
add_integer(SOUT_CFG_PREFIX "pid-spu", 300, SPUPID_TEXT, SPUPID_LONGTEXT)
change_integer_range( 32, 8190 )
add_integer(SOUT_CFG_PREFIX "pid-pmt", 32, PMTPID_TEXT, PMTPID_LONGTEXT)
change_integer_range( 32, 8190 )
add_integer(SOUT_CFG_PREFIX "tsid", 0, TSID_TEXT, TSID_LONGTEXT)
add_integer(SOUT_CFG_PREFIX "netid", 0, NETID_TEXT, NETID_LONGTEXT)
add_string(SOUT_CFG_PREFIX "program-pmt", NULL, PMTPROG_TEXT, PMTPROG_LONGTEXT)
add_bool(SOUT_CFG_PREFIX "es-id-pid", false, PID_TEXT, PID_LONGTEXT)
add_string(SOUT_CFG_PREFIX "muxpmt", NULL, MUXPMT_TEXT, MUXPMT_LONGTEXT)
add_string(SOUT_CFG_PREFIX "sdtdesc", NULL, SDTDESC_TEXT, SDTDESC_LONGTEXT)
add_bool(SOUT_CFG_PREFIX "alignment", true, ALIGNMENT_TEXT, ALIGNMENT_LONGTEXT)
add_integer(SOUT_CFG_PREFIX "shaping", 200, SHAPING_TEXT, SHAPING_LONGTEXT)
add_bool(SOUT_CFG_PREFIX "use-key-frames", false, KEYF_TEXT, KEYF_LONGTEXT)
add_integer( SOUT_CFG_PREFIX "pcr", 70, PCR_TEXT, PCR_LONGTEXT)
add_integer( SOUT_CFG_PREFIX "dts-delay", 400, DTS_TEXT, DTS_LONGTEXT)
add_obsolete_integer( "sout-ts-bmin" ) /* since 4.0.0 */
add_obsolete_integer( "sout-ts-bmax" ) /* since 4.0.0 */
add_bool( SOUT_CFG_PREFIX "crypt-audio", true, ACRYPT_TEXT, ACRYPT_LONGTEXT)
add_bool( SOUT_CFG_PREFIX "crypt-video", true, VCRYPT_TEXT, VCRYPT_LONGTEXT)
add_string( SOUT_CFG_PREFIX "csa-ck", NULL, CK_TEXT, CK_LONGTEXT)
add_string( SOUT_CFG_PREFIX "csa2-ck", NULL, CK2_TEXT, CK2_LONGTEXT)
add_string( SOUT_CFG_PREFIX "csa-use", "1", CU_TEXT, CU_LONGTEXT)
add_integer(SOUT_CFG_PREFIX "csa-pkt", 188, CPKT_TEXT, CPKT_LONGTEXT)
set_callbacks( Open, Close )
vlc_module_end ()
/*****************************************************************************
* Local data structures
*****************************************************************************/
static const char *const ppsz_sout_options[] = {
"standard",
"pid-video", "pid-audio", "pid-spu", "pid-pmt", "tsid",
"netid", "sdtdesc",
"es-id-pid", "shaping", "pcr", "use-key-frames",
"dts-delay", "csa-ck", "csa2-ck", "csa-use", "csa-pkt", "crypt-audio", "crypt-video",
"muxpmt", "program-pmt", "alignment",
NULL
};
typedef struct pmt_map_t /* Holds the mapping between the pmt-pid/pmt table */
{
int i_pid;
unsigned i_prog;
} pmt_map_t;
typedef struct
{
size_t i_depth;
block_t *p_first;
block_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, block_t *b )
{
for( block_t *bb = b; bb; bb = bb->p_next )
c->i_depth++;
block_ChainLastAppend( &c->pp_last, b );
}
static void BufferChainAppendCallback( void *opaque, block_t *b )
{
sout_buffer_chain_t *c = opaque;
BufferChainAppend(c, b);
}
static inline block_t *BufferChainGet( sout_buffer_chain_t *c )
{
block_t *b = c->p_first;
if( b )
{
c->i_depth--;
c->p_first = b->p_next;
b->p_next = NULL;
if( c->p_first == NULL )
c->pp_last = &c->p_first;
}
return b;
}
static inline block_t *BufferChainPeek( sout_buffer_chain_t *c )
{
return c->p_first;
}
static inline void BufferChainClean( sout_buffer_chain_t *c )
{
block_ChainRelease(c->p_first);
BufferChainInit( c );
}
typedef struct
{
sout_buffer_chain_t chain_pes;
vlc_tick_t i_pes_dts;
vlc_tick_t i_pes_length;
int i_pes_used;
bool b_key_frame;
} pes_state_t;
typedef struct
{
tsmux_stream_t ts;
pesmux_stream_t pes;
pes_state_t state;
} sout_input_sys_t;
typedef struct
{
sout_input_t *p_pcr_input;
vlc_mutex_t csa_lock;
dvbpsi_t *p_dvbpsi;
bool b_es_id_pid;
int i_pid_video;
int i_pid_audio;
int i_pid_spu;
int i_tsid;
unsigned i_num_pmt;
int i_pmtslots;
int i_pat_version_number;
tsmux_stream_t pat;
int i_pmt_version_number;
tsmux_stream_t pmt[MAX_PMT];
pmt_map_t pmtmap[MAX_PMT_PID];
int i_pmt_program_number[MAX_PMT];
bool b_data_alignment;
sdt_psi_t sdt;
ts_mux_standard standard;
/* for TS building */
vlc_tick_t i_shaping_delay;
vlc_tick_t i_pcr_delay;
vlc_tick_t i_dts_delay;
vlc_tick_t first_dts;
bool b_use_key_frames;
vlc_tick_t i_pcr; /* last PCR emitted */
csa_t *csa;
int i_csa_pkt_size;
bool b_crypt_audio;
bool b_crypt_video;
} sout_mux_sys_t;
static int GetNextFreePID( sout_mux_t *p_mux, int i_pid_start )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
restart:
for(unsigned i=i_pid_start; i<p_sys->i_num_pmt; i++)
{
if(p_sys->pmt[i].i_pid == i_pid_start)
{
i_pid_start++;
goto restart;
}
}
for(int i=0; i<p_mux->i_nb_inputs; i++)
{
sout_input_sys_t *p_stream = (sout_input_sys_t*)p_mux->pp_inputs[i]->p_sys;
if(p_stream->ts.i_pid == i_pid_start)
{
i_pid_start++;
goto restart;
}
}
if( i_pid_start > 8190 )
{
i_pid_start = 32;
goto restart;
}
return i_pid_start;
}
/* Reserve a pid and return it */
static int AllocatePID( sout_mux_t *p_mux, int i_cat )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
int i_pid;
int *pi_candidate_pid = NULL;
switch( i_cat )
{
case VIDEO_ES:
pi_candidate_pid = &p_sys->i_pid_video;
break;
case AUDIO_ES:
pi_candidate_pid = &p_sys->i_pid_audio;
break;
case SPU_ES:
default:
pi_candidate_pid = &p_sys->i_pid_spu;
break;
}
*pi_candidate_pid = GetNextFreePID( p_mux, *pi_candidate_pid );
i_pid = (*pi_candidate_pid)++;
return i_pid;
}
static int pmtcompare( const void *pa, const void *pb )
{
int id1 = ((pmt_map_t *)pa)->i_pid;
int id2 = ((pmt_map_t *)pb)->i_pid;
return id1 - id2;
}
static int intcompare( const void *pa, const void *pb )
{
return *(int*)pa - *(int*)pb;
}
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Control ( sout_mux_t *, int, va_list );
static int AddStream( sout_mux_t *, sout_input_t * );
static void DelStream( sout_mux_t *, sout_input_t * );
static int Mux ( sout_mux_t * );
static block_t *FixPES( block_fifo_t *p_fifo );
static block_t *Add_ADTS( block_t *, const es_format_t * );
static int TSSchedule ( sout_mux_t *p_mux, sout_buffer_chain_t *p_chain_ts,
vlc_tick_t i_pcr_length, vlc_tick_t i_pcr_dts );
static int TSDate ( sout_mux_t *p_mux, sout_buffer_chain_t *p_chain_ts,
vlc_tick_t i_pcr_length, vlc_tick_t i_pcr_dts );
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 block_t *TSNew( sout_mux_t *p_mux, sout_input_sys_t *p_stream, bool b_pcr );
static void TSSetPCR( block_t *p_ts, vlc_tick_t i_dts );
static void csaSetup( 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;
char *csack = var_CreateGetNonEmptyStringCommand( p_mux, SOUT_CFG_PREFIX "csa-ck" );
if( !csack )
return;
csa_t *csa = csa_New();
if( unlikely(csa == NULL) )
{
free(csack);
return;
}
if( csa_SetCW( p_this, csa, csack, true ) )
{
free(csack);
csa_Delete( csa );
return;
}
p_sys->csa = csa;
vlc_mutex_init( &p_sys->csa_lock );
p_sys->b_crypt_audio = var_GetBool( p_mux, SOUT_CFG_PREFIX "crypt-audio" );
p_sys->b_crypt_video = var_GetBool( p_mux, SOUT_CFG_PREFIX "crypt-video" );
char *csa2ck = var_CreateGetNonEmptyStringCommand( p_mux, SOUT_CFG_PREFIX "csa2-ck");
if (!csa2ck || csa_SetCW( p_this, csa, csa2ck, false ) )
csa_SetCW( p_this, csa, csack, false );
free(csa2ck);
var_Create( p_mux, SOUT_CFG_PREFIX "csa-use", VLC_VAR_STRING | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND );
var_AddCallback( p_mux, SOUT_CFG_PREFIX "csa-use", ActiveKeyCallback, NULL );
var_AddCallback( p_mux, SOUT_CFG_PREFIX "csa-ck", ChangeKeyCallback, p_mux );
var_AddCallback( p_mux, SOUT_CFG_PREFIX "csa2-ck", ChangeKeyCallback, NULL );
vlc_value_t use_val;
var_Get( p_mux, SOUT_CFG_PREFIX "csa-use", &use_val );
if ( var_Set( p_mux, SOUT_CFG_PREFIX "csa-use", use_val ) )
var_SetString( p_mux, SOUT_CFG_PREFIX "csa-use", "odd" );
free( use_val.psz_string );
p_sys->i_csa_pkt_size = var_GetInteger( p_mux, SOUT_CFG_PREFIX "csa-pkt" );
if( p_sys->i_csa_pkt_size < 12 || p_sys->i_csa_pkt_size > 188 )
{
msg_Err( p_mux, "wrong packet size %d specified",
p_sys->i_csa_pkt_size );
p_sys->i_csa_pkt_size = 188;
}
msg_Dbg( p_mux, "encrypting %d bytes of packet", p_sys->i_csa_pkt_size );
free(csack);
}
/*****************************************************************************
* 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 = NULL;
config_ChainParse( p_mux, SOUT_CFG_PREFIX, ppsz_sout_options, p_mux->p_cfg );
p_sys = calloc( 1, sizeof( sout_mux_sys_t ) );
if( !p_sys )
return VLC_ENOMEM;
p_sys->i_num_pmt = 1;
p_sys->p_dvbpsi = dvbpsi_new( &dvbpsi_messages, DVBPSI_MSG_DEBUG );
if( !p_sys->p_dvbpsi )
{
free( p_sys );
return VLC_ENOMEM;
}
p_sys->p_dvbpsi->p_sys = (void *) p_mux;
char *psz_standard = var_GetString( p_mux, SOUT_CFG_PREFIX "standard" );
if( psz_standard && !strcmp("atsc", psz_standard) )
p_sys->standard = TS_MUX_STANDARD_ATSC;
free( psz_standard );
p_sys->b_es_id_pid = var_GetBool( p_mux, SOUT_CFG_PREFIX "es-id-pid" );
/*
fetch string of pmts. Here's a sample: --sout-ts-muxpmt="0x451,0x200,0x28a,0x240,,0x450,0x201,0x28b,0x241,,0x452,0x202,0x28c,0x242"
This would mean 0x451, 0x200, 0x28a, 0x240 would fall under one pmt (program), 0x450,0x201,0x28b,0x241 would fall under another
*/
char *muxpmt = var_GetNonEmptyString(p_mux, SOUT_CFG_PREFIX "muxpmt");
for (char *psz = muxpmt; psz; )
{
char *psz_next;
uint16_t i_pid = strtoul( psz, &psz_next, 0 );
psz = *psz_next ? &psz_next[1] : NULL;
if ( i_pid == 0 )
{
if ( ++p_sys->i_num_pmt > MAX_PMT )
{
msg_Err( p_mux, "Number of PMTs > %d)", MAX_PMT );
p_sys->i_num_pmt = MAX_PMT;
}
}
else
{
p_sys->pmtmap[p_sys->i_pmtslots].i_pid = i_pid;
p_sys->pmtmap[p_sys->i_pmtslots].i_prog = p_sys->i_num_pmt - 1;
if ( ++p_sys->i_pmtslots >= MAX_PMT_PID )
{
msg_Err( p_mux, "Number of pids in PMT > %d", MAX_PMT_PID );
p_sys->i_pmtslots = MAX_PMT_PID - 1;
}
}
}
/* Now sort according to pids for fast search later on */
qsort( (void *)p_sys->pmtmap, p_sys->i_pmtslots,
sizeof(pmt_map_t), pmtcompare );
free(muxpmt);
unsigned short subi[3];
vlc_rand_bytes(subi, sizeof(subi));
p_sys->i_pat_version_number = nrand48(subi) & 0x1f;
vlc_value_t val,val2;
var_Get( p_mux, SOUT_CFG_PREFIX "tsid", &val );
if ( val.i_int )
p_sys->i_tsid = val.i_int;
else
p_sys->i_tsid = nrand48(subi) & 0xffff;
var_Get( p_mux, SOUT_CFG_PREFIX "netid", &val );
if ( val.i_int )
p_sys->sdt.i_netid = val.i_int;
else
p_sys->sdt.i_netid = 0xff00 | ( nrand48(subi) & 0xfa );
p_sys->i_pmt_version_number = nrand48(subi) & 0x1f;
p_sys->sdt.ts.i_pid = 0x11;
char *sdtdesc = var_GetNonEmptyString( p_mux, SOUT_CFG_PREFIX "sdtdesc" );
/* Syntax is provider_sdt1,service_name_sdt1,provider_sdt2,service_name_sdt2... */
if( sdtdesc )
{
char *psz_sdttoken = sdtdesc;
for (int i = 0; i < MAX_SDT_DESC * 2 && psz_sdttoken; i++)
{
char *psz_end = strchr( psz_sdttoken, ',' );
if ( psz_end )
*psz_end++ = '\0';
if (i % 2)
p_sys->sdt.desc[i/2].psz_service_name = FromLocaleDup( psz_sdttoken );
else
p_sys->sdt.desc[i/2].psz_provider = FromLocaleDup( psz_sdttoken );
psz_sdttoken = psz_end;
}
free(sdtdesc);
}
p_sys->b_data_alignment = var_GetBool( p_mux, SOUT_CFG_PREFIX "alignment" );
char *pgrpmt = var_GetNonEmptyString(p_mux, SOUT_CFG_PREFIX "program-pmt");
if( pgrpmt )
{
char *psz = pgrpmt;
char *psz_next = psz;
for (int i = 0; psz; )
{
uint16_t i_pid = strtoul( psz, &psz_next, 0 );
if( psz_next[0] != '\0' )
psz = &psz_next[1];
else
psz = NULL;
if( i_pid == 0 )
{
if( i >= MAX_PMT )
msg_Err( p_mux, "Number of PMTs > maximum (%d)", MAX_PMT );
}
else
{
p_sys->i_pmt_program_number[i] = i_pid;
i++;
}
}
free(pgrpmt);
}
else
{
/* Option not specified, use 1, 2, 3... */
for (unsigned i = 0; i < p_sys->i_num_pmt; i++ )
p_sys->i_pmt_program_number[i] = i + 1;
}
var_Get( p_mux, SOUT_CFG_PREFIX "pid-pmt", &val );
for (unsigned i = 0; i < p_sys->i_num_pmt; i++ )
p_sys->pmt[i].i_pid = val.i_int + i;
p_sys->i_pid_video = var_GetInteger( p_mux, SOUT_CFG_PREFIX "pid-video" );
p_sys->i_pid_audio = var_GetInteger( p_mux, SOUT_CFG_PREFIX "pid-audio" );
p_sys->i_pid_spu = var_GetInteger( p_mux, SOUT_CFG_PREFIX "pid-spu" );
var_Get( p_mux, SOUT_CFG_PREFIX "shaping", &val );
if( val.i_int <= 0 )
{
msg_Err( p_mux,
"invalid shaping (%"PRId64"ms) resetting to 200ms",
val.i_int );
p_sys->i_shaping_delay = VLC_TICK_FROM_MS(200);
}
else
{
p_sys->i_shaping_delay = VLC_TICK_FROM_MS(val.i_int);
}
var_Get( p_mux, SOUT_CFG_PREFIX "pcr", &val2 );
if( val2.i_int <= 0 || val2.i_int >= val.i_int )
{
msg_Err( p_mux,
"invalid pcr delay (%"PRId64"ms) resetting to 70ms",
val2.i_int );
p_sys->i_pcr_delay = VLC_TICK_FROM_MS(70);
}
else
{
p_sys->i_pcr_delay = VLC_TICK_FROM_MS(val2.i_int);
}
var_Get( p_mux, SOUT_CFG_PREFIX "dts-delay", &val );
p_sys->i_dts_delay = VLC_TICK_FROM_MS(val.i_int);
msg_Dbg( p_mux, "shaping=%"PRId64" pcr=%"PRId64" dts_delay=%"PRId64,
p_sys->i_shaping_delay, p_sys->i_pcr_delay, p_sys->i_dts_delay );
p_sys->b_use_key_frames = var_GetBool( p_mux, SOUT_CFG_PREFIX "use-key-frames" );
p_mux->p_sys = p_sys;
csaSetup( p_this );
p_mux->pf_control = Control;
p_mux->pf_addstream = AddStream;
p_mux->pf_delstream = DelStream;
p_mux->pf_mux = Mux;
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;
if( p_sys->p_dvbpsi )
dvbpsi_delete( p_sys->p_dvbpsi );
if( p_sys->csa )
{
var_DelCallback( p_mux, SOUT_CFG_PREFIX "csa-ck", ChangeKeyCallback, p_mux );
var_DelCallback( p_mux, SOUT_CFG_PREFIX "csa2-ck", ChangeKeyCallback, NULL );
var_DelCallback( p_mux, SOUT_CFG_PREFIX "csa-use", ActiveKeyCallback, NULL );
csa_Delete( p_sys->csa );
}
for (int i = 0; i < MAX_SDT_DESC; i++ )
{
free( p_sys->sdt.desc[i].psz_service_name );
free( p_sys->sdt.desc[i].psz_provider );
}
free( p_sys );
}
/*****************************************************************************
* ChangeKeyCallback: called when changing the odd encryption key on the fly.
*****************************************************************************/
static int ChangeKeyCallback( vlc_object_t *p_this, char const *psz_cmd,
vlc_value_t oldval, vlc_value_t newval,
void *p_data )
{
VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
sout_mux_t *p_mux = (sout_mux_t*)p_this;
sout_mux_sys_t *p_sys = p_mux->p_sys;
int ret;
vlc_mutex_lock(&p_sys->csa_lock);
ret = csa_SetCW(p_this, p_sys->csa, newval.psz_string, p_data != NULL);
vlc_mutex_unlock(&p_sys->csa_lock);
return ret;
}
/*****************************************************************************
* ActiveKeyCallback: called when changing the active (in use) encryption key on the fly.
*****************************************************************************/
static int ActiveKeyCallback( vlc_object_t *p_this, char const *psz_cmd,
vlc_value_t oldval, vlc_value_t newval,
void *p_data )
{
VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(p_data);
sout_mux_t *p_mux = (sout_mux_t*)p_this;
sout_mux_sys_t *p_sys = p_mux->p_sys;
int use_odd = -1;
if( !strcmp(newval.psz_string, "odd" ) ||
!strcmp(newval.psz_string, "first" ) ||
!strcmp(newval.psz_string, "1" ) )
{
use_odd = 1;
}
else if( !strcmp(newval.psz_string, "even" ) ||
!strcmp(newval.psz_string, "second" ) ||
!strcmp(newval.psz_string, "2" ) )
{
use_odd = 0;
}
if (use_odd < 0)
return VLC_EINVAL;
vlc_mutex_lock( &p_sys->csa_lock );
csa_UseKey( p_this, p_sys->csa, use_odd );
vlc_mutex_unlock( &p_sys->csa_lock );
return VLC_SUCCESS;
}
/*****************************************************************************
* Control:
*****************************************************************************/
static int Control( sout_mux_t *p_mux, int i_query, va_list args )
{
VLC_UNUSED(p_mux);
bool *pb_bool;
char **ppsz;
switch( i_query )
{
case MUX_CAN_ADD_STREAM_WHILE_MUXING:
pb_bool = va_arg( args, bool * );
*pb_bool = true;
return VLC_SUCCESS;
case MUX_GET_MIME:
ppsz = va_arg( args, char ** );
*ppsz = strdup( "video/mp2t" );
return VLC_SUCCESS;
default:
return VLC_EGENERIC;
}
}
static void SelectPCRStream( sout_mux_t *p_mux, sout_input_t *p_removed_pcr_input )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
/* Find a new pcr stream (Prefer Video Stream) */
if( p_removed_pcr_input != NULL )
p_sys->p_pcr_input = NULL;
for ( int i = 0; i < p_mux->i_nb_inputs; i++ )
{
sout_input_t *p_input = p_mux->pp_inputs[i];
if( p_input == p_removed_pcr_input )
continue;
if( p_input->p_fmt->i_cat == VIDEO_ES &&
(p_sys->p_pcr_input == NULL ||
p_sys->p_pcr_input->p_fmt->i_cat != VIDEO_ES) )
{
p_sys->p_pcr_input = p_input;
break;
}
else if( p_input->p_fmt->i_cat != SPU_ES &&
p_sys->p_pcr_input == NULL )
{
p_sys->p_pcr_input = p_input;
}
}
if( p_sys->p_pcr_input )
{
/* Empty TS buffer */
/* FIXME */
msg_Dbg( p_mux, "new PCR PID is %d",
((sout_input_sys_t *)p_sys->p_pcr_input->p_sys)->ts.i_pid );
}
}
/*****************************************************************************
* 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;
sout_input_sys_t *p_stream;
p_input->p_sys = p_stream = calloc( 1, sizeof( sout_input_sys_t ) );
if( !p_stream )
goto oom;
if ( p_sys->b_es_id_pid )
p_stream->ts.i_pid = p_input->fmt.i_id & 0x1fff;
else
p_stream->ts.i_pid = AllocatePID( p_mux, p_input->p_fmt->i_cat );
if( FillPMTESParams( p_sys->standard, p_input->p_fmt,
&p_stream->ts, &p_stream->pes ) != VLC_SUCCESS )
{
msg_Warn( p_mux, "rejecting stream with unsupported codec %4.4s",
(char*)&p_input->p_fmt->i_codec );
free( p_stream );
return VLC_EGENERIC;
}
p_stream->pes.i_langs = 1 + p_input->p_fmt->i_extra_languages;
p_stream->pes.lang = calloc(1, p_stream->pes.i_langs * 4);
if( !p_stream->pes.lang )
goto oom;
msg_Dbg( p_mux, "adding input codec=%4.4s pid=%d",
(char*)&p_input->fmt.i_codec, p_stream->ts.i_pid );
for (size_t i = 0; i < p_stream->pes.i_langs; i++) {
char *lang = (i == 0)
? p_input->p_fmt->psz_language
: p_input->p_fmt->p_extra_languages[i-1].psz_language;
if (!lang)
continue;
const iso639_lang_t *pl = vlc_find_iso639(lang, false);
if (pl)
{
memcpy(&p_stream->pes.lang[i*4], pl->psz_iso639_2T, 3);
p_stream->pes.lang[i*4+3] = 0x00; /* audio type: 0x00 undefined */
msg_Dbg( p_mux, " - lang=%3.3s", pl->psz_iso639_2T );
}
}
/* Init pes chain */
BufferChainInit( &p_stream->state.chain_pes );
/* 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 */
SelectPCRStream( p_mux, NULL );
/* Set scramble flag / mode (CSA for now) */
switch( p_input->p_fmt->i_cat )
{
case VIDEO_ES:
p_stream->ts.b_scramble = p_sys->b_crypt_video && p_sys->csa;
break;
case AUDIO_ES:
p_stream->ts.b_scramble = p_sys->b_crypt_audio && p_sys->csa;
break;
default:
p_stream->ts.b_scramble = false;
break;
}
return VLC_SUCCESS;
oom:
if(p_stream)
{
free(p_stream->pes.lang);
free(p_stream);
}
return VLC_ENOMEM;
}
/*****************************************************************************
* DelStream: called before a stream deletion
*****************************************************************************/
static void DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
sout_input_sys_t *p_stream = (sout_input_sys_t*)p_input->p_sys;
int pid;
msg_Dbg( p_mux, "removing input pid=%d", p_stream->ts.i_pid );
if( p_sys->p_pcr_input == p_input )
{
/* Repick new PCR */
SelectPCRStream( p_mux, p_input );
}
/* Empty all data in chain_pes */
BufferChainClean( &p_stream->state.chain_pes );
pid = var_GetInteger( p_mux, SOUT_CFG_PREFIX "pid-video" );
if ( pid > 0 && pid == p_stream->ts.i_pid )
{
p_sys->i_pid_video = pid;
msg_Dbg( p_mux, "freeing video PID %d", pid);
}
pid = var_GetInteger( p_mux, SOUT_CFG_PREFIX "pid-audio" );
if ( pid > 0 && pid == p_stream->ts.i_pid )
{
p_sys->i_pid_audio = pid;
msg_Dbg( p_mux, "freeing audio PID %d", pid);
}
pid = var_GetInteger( p_mux, SOUT_CFG_PREFIX "pid-spu" );
if ( pid > 0 && pid == p_stream->ts.i_pid )
{
p_sys->i_pid_spu = pid;
msg_Dbg( p_mux, "freeing spu PID %d", pid);
}
free(p_stream->pes.lang);
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;
}
static void SetHeader( sout_buffer_chain_t *c,
int depth )
{
block_t *p_ts = BufferChainPeek( c );
while( depth > 0 )
{
p_ts = p_ts->p_next;
depth--;
}
p_ts->i_flags |= BLOCK_FLAG_HEADER;
}
static block_t *Pack_Opus(block_t *p_data)
{
lldiv_t d = lldiv(p_data->i_buffer, 255);
p_data = block_Realloc(p_data, 2 + d.quot + 1, p_data->i_buffer);
if (p_data) { /* no flags */
p_data->p_buffer[0] = 0x7f;
p_data->p_buffer[1] = 0xe0;
memset(&p_data->p_buffer[2], 0xff, d.quot);
p_data->p_buffer[2+d.quot] = d.rem;
}
return p_data;
}
static void SetBlockDuration( sout_input_t *p_input, block_t *p_data )
{
sout_input_sys_t *p_stream = (sout_input_sys_t*) p_input->p_sys;
if( p_input->p_fmt->i_cat != SPU_ES &&
block_FifoCount( p_input->p_fifo ) > 0 )
{
block_t *p_next = block_FifoShow( p_input->p_fifo );
vlc_tick_t i_diff = p_next->i_dts - p_data->i_dts;
if( i_diff > 0 &&
(p_next->i_flags & BLOCK_FLAG_DISCONTINUITY) == 0 )
{
p_data->i_length = i_diff;
}
else if ( p_data->i_length == 0 )
{
/* Try rates */
if( p_input->p_fmt->i_cat == VIDEO_ES &&
p_input->p_fmt->video.i_frame_rate &&
p_input->p_fmt->video.i_frame_rate_base )
{
p_data->i_length = vlc_tick_from_samples(
p_input->p_fmt->video.i_frame_rate,
p_input->p_fmt->video.i_frame_rate_base);
}
else if( p_input->p_fmt->i_cat == AUDIO_ES &&
p_input->p_fmt->audio.i_bytes_per_frame &&
p_input->p_fmt->audio.i_frame_length )
{
p_data->i_length = p_data->i_buffer *
p_input->p_fmt->audio.i_frame_length /
p_input->p_fmt->audio.i_bytes_per_frame;
}
/* Try a previous duration */
else if( p_stream->state.chain_pes.p_first )
p_data->i_length = p_stream->state.chain_pes.p_first->i_length;
/* Or next */
else if( p_next->i_length > 0 )
p_data->i_length = p_next->i_length;
/* or worse */
else
p_data->i_length = VLC_TICK_FROM_MS(1);
}
}
else if( p_input->p_fmt->i_codec != VLC_CODEC_SUBT )
{
p_data->i_length = VLC_TICK_FROM_MS(1);
}
}
static block_t *Encap_J2K( block_t *p_data, const es_format_t *p_fmt )
{
size_t i_offset = 0;
uint32_t i_box = 0;
while( p_data->i_buffer > 8 && p_data->i_buffer - i_offset > 8 )
{
const uint32_t i_size = GetDWBE( &p_data->p_buffer[i_offset] );
i_box = VLC_FOURCC( p_data->p_buffer[i_offset + 4],
p_data->p_buffer[i_offset + 5],
p_data->p_buffer[i_offset + 6],
p_data->p_buffer[i_offset + 7] );
if( p_data->i_buffer - i_offset < i_size || i_size < 8 )
{
i_box = 0;
break;
}
else if( i_box == J2K_BOX_JP2C )
{
break;
}
i_offset += i_size;
}
if( i_box != J2K_BOX_JP2C )
{
block_Release( p_data );
return NULL;
}
if( i_offset < 38 )
{
block_t *p_realloc = block_Realloc( p_data, 38 - i_offset, p_data->i_buffer );
if( unlikely(!p_realloc) )
{
block_Release( p_data );
return NULL;
}
p_data = p_realloc;
}
else
{
p_data->p_buffer += (i_offset - 38);
p_data->i_buffer -= (i_offset - 38);
}
const int profile = j2k_get_profile( p_fmt->video.i_visible_width,
p_fmt->video.i_visible_height,
p_fmt->video.i_frame_rate,
p_fmt->video.i_frame_rate_base, true );
memcpy( p_data->p_buffer, "elsmfrat", 8 );
SetWBE( &p_data->p_buffer[8], p_fmt->video.i_frame_rate_base );
SetWBE( &p_data->p_buffer[10], p_fmt->video.i_frame_rate );
memcpy( &p_data->p_buffer[12], "brat", 4 );
unsigned min = j2k_profiles_rates[profile].min * 1000000;
unsigned max = j2k_profiles_rates[profile].max * 1000000;
SetDWBE(&p_data->p_buffer[16], max );
SetDWBE(&p_data->p_buffer[20], min );
memcpy( &p_data->p_buffer[24], "tcod", 4 );
const unsigned s = SEC_FROM_VLC_TICK(p_data->i_pts);
const unsigned m = s / 60;
const unsigned h = m / 60;
const uint64_t l = p_fmt->video.i_frame_rate_base * CLOCK_FREQ /
p_fmt->video.i_frame_rate;
const unsigned f = (p_data->i_pts % CLOCK_FREQ) / l;
p_data->p_buffer[28] = h;
p_data->p_buffer[29] = m % 60;
p_data->p_buffer[30] = s % 60;
p_data->p_buffer[31] = f;
memcpy( &p_data->p_buffer[32], "bcol", 4 );
p_data->p_buffer[36] = j2k_get_color_spec( p_fmt->video.primaries,
p_fmt->video.transfer,
p_fmt->video.space );
p_data->p_buffer[37] = 0;
return p_data;
}
static int MuxStreams( sout_mux_t *p_mux )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
sout_input_sys_t *p_pcr_stream = (sout_input_sys_t*)p_sys->p_pcr_input->p_sys;
sout_buffer_chain_t chain_ts;
vlc_tick_t i_shaping_delay = p_pcr_stream->state.b_key_frame
? p_pcr_stream->state.i_pes_length
: p_sys->i_shaping_delay;
bool b_ok = true;
/* Accumulate enough data in the pcr stream (>i_shaping_delay) */
/* Accumulate enough data in all other stream ( >= length of pcr)*/
for (int i = -1; !b_ok || i < p_mux->i_nb_inputs; i++ )
{
if (i == p_mux->i_nb_inputs)
{
/* get enough PES packet for all input */
b_ok = true;
i = -1;
}
sout_input_t *p_input;
if( i == -1 )
p_input = p_sys->p_pcr_input;
else if( p_mux->pp_inputs[i] != p_sys->p_pcr_input )
p_input = p_mux->pp_inputs[i];
else
continue;
sout_input_sys_t *p_stream = (sout_input_sys_t*)p_input->p_sys;
if( ( p_stream != p_pcr_stream ||
p_stream->state.i_pes_length >= i_shaping_delay ) &&
p_stream->state.i_pes_dts + p_stream->state.i_pes_length >=
p_pcr_stream->state.i_pes_dts + p_pcr_stream->state.i_pes_length )
continue;
/* Need more data */
if( block_FifoCount( p_input->p_fifo ) <= 1 )
{
if( ( p_input->p_fmt->i_cat == AUDIO_ES ) ||
( p_input->p_fmt->i_cat == VIDEO_ES ) )
{
return -EAGAIN;
}
else if( block_FifoCount( p_input->p_fifo ) <= 0 )
{
/* spu, only one packet is needed */
continue;
}
else if( p_input->p_fmt->i_cat == SPU_ES )
{
/* Don't mux the SPU yet if it is too early */
block_t *p_spu = block_FifoShow( p_input->p_fifo );
int64_t i_spu_delay = p_spu->i_dts - p_pcr_stream->state.i_pes_dts;
if( ( i_spu_delay > i_shaping_delay ) &&
( i_spu_delay < VLC_TICK_FROM_SEC(100)) )
continue;
if ( ( i_spu_delay >= VLC_TICK_FROM_SEC(100)) ||
( i_spu_delay < VLC_TICK_FROM_MS(10) ) )
{
BufferChainClean( &p_stream->state.chain_pes );
p_stream->state.i_pes_dts = 0;
p_stream->state.i_pes_used = 0;
p_stream->state.i_pes_length = 0;
continue;
}
}
}
b_ok = false;
block_t *p_data;
if( p_stream == p_pcr_stream || p_sys->b_data_alignment
|| (p_input->p_fmt->i_codec != VLC_CODEC_MPGA &&
p_input->p_fmt->i_codec != VLC_CODEC_MP2 &&
p_input->p_fmt->i_codec != VLC_CODEC_MP3 ) )
{
p_data = block_FifoGet( p_input->p_fifo );
if( p_data->i_dts == VLC_TICK_INVALID )
p_data->i_dts = p_data->i_pts;
else if ( p_data->i_pts == VLC_TICK_INVALID )
p_data->i_pts = p_data->i_dts;
if( p_input->p_fmt->i_codec == VLC_CODEC_MP4A )
p_data = Add_ADTS( p_data, p_input->p_fmt );
else if( p_input->p_fmt->i_codec == VLC_CODEC_OPUS )
p_data = Pack_Opus( p_data );
}
else
p_data = FixPES( p_input->p_fifo );
SetBlockDuration( p_input, p_data );
if( p_data->i_dts == VLC_TICK_INVALID )
{
msg_Err( p_mux, "non dated packet dropped" );
block_Release( p_data );
continue;
}
if ( p_sys->first_dts == 0 )
{
/* Pick the really first DTS */
p_sys->first_dts = p_data->i_dts;
for (int j = 0; j < p_mux->i_nb_inputs; j++ )
{
if( p_mux->pp_inputs[j] != p_input &&
block_FifoCount( p_mux->pp_inputs[j]->p_fifo) > 0 )
{
block_t *p_block = block_FifoShow( p_mux->pp_inputs[j]->p_fifo );
if( p_block->i_dts != VLC_TICK_INVALID &&
p_block->i_dts < p_sys->first_dts )
p_sys->first_dts = p_block->i_dts;
}
}
}
if( ( p_pcr_stream->state.i_pes_dts > 0 &&
p_data->i_dts - VLC_TICK_FROM_SEC(10)> p_pcr_stream->state.i_pes_dts +
p_pcr_stream->state.i_pes_length ) ||
p_data->i_dts + i_shaping_delay < p_stream->state.i_pes_dts ||
( p_stream->state.i_pes_dts > 0 &&
p_input->p_fmt->i_cat != SPU_ES &&
p_data->i_dts - VLC_TICK_FROM_SEC(10)> p_stream->state.i_pes_dts +
p_stream->state.i_pes_length ) )
{
msg_Warn( p_mux, "packet with too strange dts on pid %d (%4.4s)"
"(dts=%"PRId64",old=%"PRId64",pcr=%"PRId64")",
p_stream->ts.i_pid, (char *) &p_input->fmt.i_codec,
p_data->i_dts, p_stream->state.i_pes_dts,
p_pcr_stream->state.i_pes_dts );
block_Release( p_data );
BufferChainClean( &p_stream->state.chain_pes );
p_stream->state.i_pes_dts = 0;
p_stream->state.i_pes_used = 0;
p_stream->state.i_pes_length = 0;
if( p_input->p_fmt->i_cat != SPU_ES )
{
BufferChainClean( &p_pcr_stream->state.chain_pes );
p_pcr_stream->state.i_pes_dts = 0;
p_pcr_stream->state.i_pes_used = 0;
p_pcr_stream->state.i_pes_length = 0;
}
continue;
}
int i_header_size = 0;
int i_max_pes_size = 0;
int b_data_alignment = 0;
if( p_input->p_fmt->i_cat == SPU_ES ) switch (p_input->p_fmt->i_codec)
{
case VLC_CODEC_SUBT:
/* Prepend header */
p_data = block_Realloc( p_data, 2, p_data->i_buffer );
p_data->p_buffer[0] = ( (p_data->i_buffer - 2) >> 8) & 0xff;
p_data->p_buffer[1] = ( (p_data->i_buffer - 2) ) & 0xff;
/* remove trailing \0 if any */
if( p_data->i_buffer > 2 && !p_data->p_buffer[p_data->i_buffer-1] )
p_data->i_buffer--;
/* Append a empty sub (sub text only) */
if( p_data->i_length > 0 &&
( p_data->i_buffer != 1 || *p_data->p_buffer != ' ' ) )
{
block_t *p_spu = block_Alloc( 3 );
p_spu->i_dts = p_data->i_dts + p_data->i_length;
p_spu->i_pts = p_spu->i_dts;
p_spu->i_length = VLC_TICK_FROM_MS(1);
p_spu->p_buffer[0] = 0;
p_spu->p_buffer[1] = 1;
p_spu->p_buffer[2] = ' ';
EStoPES( &p_spu, p_input->p_fmt,
p_stream->pes.i_stream_id, 1, 0, 0, 0,
p_sys->first_dts - p_sys->i_dts_delay );
p_data->p_next = p_spu;
}
break;
case VLC_CODEC_TELETEXT:
/* EN 300 472 */
i_header_size = 0x24;
b_data_alignment = 1;
break;
case VLC_CODEC_DVBS:
/* EN 300 743 */
b_data_alignment = 1;
break;
}
else if( p_input->fmt.i_cat == VIDEO_ES )
{
if( p_input->fmt.i_codec == VLC_CODEC_JPEG2000 )
{
if( p_data->i_flags & BLOCK_FLAG_INTERLACED_MASK )
msg_Warn( p_mux, "Unsupported interlaced J2K content. Expect broken result");
p_data = Encap_J2K( p_data, &p_input->fmt );
if( !p_data )
return VLC_EGENERIC;
}
}
else if( p_data->i_length < 0 || p_data->i_length > VLC_TICK_FROM_SEC(2) )
{
/* FIXME choose a better value, but anyway we
* should never have to do that */
p_data->i_length = VLC_TICK_FROM_MS(1);
}
p_stream->state.i_pes_length += p_data->i_length;
if( p_stream->state.i_pes_dts == 0 )
{
p_stream->state.i_pes_dts = p_data->i_dts;
}
/* Convert to pes */
if( p_stream->pes.i_stream_id == 0xa0 && p_data->i_pts <= 0 )
{
/* XXX yes I know, it's awful, but it's needed,
* so don't remove it ... */
p_data->i_pts = p_data->i_dts;
}
if( (p_input->p_fmt->i_codec == VLC_CODEC_DIRAC) ||
(p_input->p_fmt->i_codec == VLC_CODEC_H264) ||
(p_input->p_fmt->i_codec == VLC_CODEC_HEVC) ||
(p_input->p_fmt->i_codec == VLC_CODEC_MP2V)
)
{
b_data_alignment = 1;
/* dirac and mpeg video pes packets should be unbounded in
* length, specify a suitibly large max size */
i_max_pes_size = INT_MAX;
}
EStoPES ( &p_data, p_input->p_fmt, p_stream->pes.i_stream_id,
1, b_data_alignment, i_header_size,
i_max_pes_size, p_sys->first_dts - p_sys->i_dts_delay );
BufferChainAppend( &p_stream->state.chain_pes, p_data );
if( p_sys->b_use_key_frames && p_stream == p_pcr_stream
&& (p_data->i_flags & BLOCK_FLAG_TYPE_I)
&& !(p_data->i_flags & BLOCK_FLAG_NO_KEYFRAME)
&& (p_stream->state.i_pes_length > VLC_TICK_FROM_MS(400)) )
{
i_shaping_delay = p_stream->state.i_pes_length;
p_stream->state.b_key_frame = 1;
}
}
/* save */
const vlc_tick_t i_pcr_length = p_pcr_stream->state.i_pes_length;
p_pcr_stream->state.b_key_frame = 0;
/* msg_Dbg( p_mux, "starting muxing %lldms", i_pcr_length / 1000 ); */
/* 2: calculate non accurate total size of muxed ts */
int i_packet_count = 0;
for (int i = 0; i < p_mux->i_nb_inputs; i++ )
{
sout_input_sys_t *p_stream = (sout_input_sys_t*)p_mux->pp_inputs[i]->p_sys;
/* False for pcr stream but it will be enough to do PCR algo */
for (block_t *p_pes = p_stream->state.chain_pes.p_first; p_pes != NULL;
p_pes = p_pes->p_next )
{
int i_size = p_pes->i_buffer;
vlc_tick_t i_frag = p_pcr_stream->state.i_pes_dts +
p_pcr_stream->state.i_pes_length - p_pes->i_dts;
if( p_pes->i_length > i_frag )
{
if( i_frag < 0 )
{
/* Next stream */
break;
}
i_size = p_pes->i_buffer * i_frag / p_pes->i_length;
}
i_packet_count += ( i_size + 183 ) / 184;
}
}
/* add overhead for PCR (not really exact) */
i_packet_count += (8 * i_pcr_length / p_sys->i_pcr_delay + 175) / 176;
/* 3: mux PES into TS */
BufferChainInit( &chain_ts );
/* append PAT/PMT -> FIXME with big pcr delay it won't have enough pat/pmt */
bool pat_was_previous = true; //This is to prevent unnecessary double PAT/PMT insertions
GetPAT( p_mux, &chain_ts );
GetPMT( p_mux, &chain_ts );
int i_packet_pos = 0;
i_packet_count += chain_ts.i_depth;
/* msg_Dbg( p_mux, "estimated pck=%d", i_packet_count ); */
const vlc_tick_t i_pcr_dts = p_pcr_stream->state.i_pes_dts;
for (;;)
{
int i_stream = -1;
vlc_tick_t i_dts = 0;
sout_input_sys_t *p_stream;
/* Select stream (lowest dts) */
for (int i = 0; i < p_mux->i_nb_inputs; i++ )
{
p_stream = (sout_input_sys_t*)p_mux->pp_inputs[i]->p_sys;
if( p_stream->state.i_pes_dts == 0 )
{
continue;
}
if( i_stream == -1 || p_stream->state.i_pes_dts < i_dts )
{
i_stream = i;
i_dts = p_stream->state.i_pes_dts;
}
}
if( i_stream == -1 || i_dts > i_pcr_dts + i_pcr_length )
{
break;
}
p_stream = (sout_input_sys_t*)p_mux->pp_inputs[i_stream]->p_sys;
sout_input_t *p_input = p_mux->pp_inputs[i_stream];
/* do we need to issue pcr */
bool b_pcr = false;
vlc_tick_t packet_length = i_pcr_length * i_packet_pos / i_packet_count;
if( p_stream == p_pcr_stream &&
i_pcr_dts + packet_length >=
p_sys->i_pcr + p_sys->i_pcr_delay )
{
b_pcr = true;
p_sys->i_pcr = i_pcr_dts + packet_length;
}
/* Build the TS packet */
block_t *p_ts = TSNew( p_mux, p_stream, b_pcr );
if( p_stream->ts.b_scramble )
p_ts->i_flags |= BLOCK_FLAG_SCRAMBLED;
i_packet_pos++;
/* Write PAT/PMT before every keyframe if use-key-frames is enabled,
* this helps to do segmenting with livehttp-output so it can cut segment
* and start new one with pat,pmt,keyframe*/
if( ( p_sys->b_use_key_frames ) &&
( p_input->p_fmt->i_cat == VIDEO_ES ) &&
( p_ts->i_flags & BLOCK_FLAG_TYPE_I ) )
{
if( likely( !pat_was_previous ) )
{
int startcount = chain_ts.i_depth;
GetPAT( p_mux, &chain_ts );
GetPMT( p_mux, &chain_ts );
SetHeader( &chain_ts, startcount );
i_packet_count += (chain_ts.i_depth - startcount );
} else {
SetHeader( &chain_ts, 0); //We just inserted pat/pmt,so just flag it instead of adding new one
}
}
pat_was_previous = false;
/* */
BufferChainAppend( &chain_ts, p_ts );
}
/* 4: date and send */
return TSSchedule( p_mux, &chain_ts, i_pcr_length, i_pcr_dts );
}
/*****************************************************************************
* 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;
if( p_sys->p_pcr_input == NULL )
{
for (int i = 0; i < p_mux->i_nb_inputs; i++ )
{
block_FifoEmpty( p_mux->pp_inputs[i]->p_fifo );
}
msg_Dbg( p_mux, "waiting for PCR streams" );
return VLC_SUCCESS;
}
int status;
while( (status = MuxStreams( p_mux )) == VLC_SUCCESS );
return (status == -EAGAIN) ? VLC_SUCCESS : status;
}
#define STD_PES_PAYLOAD 170
static block_t *FixPES( block_fifo_t *p_fifo )
{
block_t *p_data;
size_t i_size;
p_data = block_FifoShow( p_fifo );
i_size = p_data->i_buffer;
if( i_size == STD_PES_PAYLOAD )
{
return block_FifoGet( p_fifo );
}
else if( i_size > STD_PES_PAYLOAD )
{
block_t *p_new = block_Alloc( STD_PES_PAYLOAD );
memcpy( p_new->p_buffer, p_data->p_buffer, STD_PES_PAYLOAD );
p_new->i_pts = p_data->i_pts;
p_new->i_dts = p_data->i_dts;
p_new->i_length = p_data->i_length * STD_PES_PAYLOAD
/ p_data->i_buffer;
p_data->i_buffer -= STD_PES_PAYLOAD;
p_data->p_buffer += STD_PES_PAYLOAD;
p_data->i_pts += p_new->i_length;
p_data->i_dts += p_new->i_length;
p_data->i_length -= p_new->i_length;
p_data->i_flags |= BLOCK_FLAG_NO_KEYFRAME;
return p_new;
}
else
{
block_t *p_next;
int i_copy;
p_data = block_FifoGet( p_fifo );
p_data = block_Realloc( p_data, 0, STD_PES_PAYLOAD );
p_next = block_FifoShow( p_fifo );
if ( p_data->i_flags & BLOCK_FLAG_NO_KEYFRAME )
{
p_data->i_flags &= ~BLOCK_FLAG_NO_KEYFRAME;
p_data->i_pts = p_next->i_pts;
p_data->i_dts = p_next->i_dts;
}
i_copy = __MIN( STD_PES_PAYLOAD - i_size, p_next->i_buffer );
memcpy( &p_data->p_buffer[i_size], p_next->p_buffer, i_copy );
vlc_tick_t offset = p_next->i_length * i_copy / p_next->i_buffer;
if( p_next->i_pts )
p_next->i_pts += offset;
if( p_next->i_dts )
p_next->i_dts += offset;
p_next->i_length -= offset;
p_next->i_buffer -= i_copy;
p_next->p_buffer += i_copy;
p_next->i_flags |= BLOCK_FLAG_NO_KEYFRAME;
if( !p_next->i_buffer )
{
p_next = block_FifoGet( p_fifo );
block_Release( p_next );
}
return p_data;
}
}
static block_t *Add_ADTS( block_t *p_data, const es_format_t *p_fmt )
{
#define ADTS_HEADER_SIZE 7 /* CRC needs 2 more bytes */
const uint8_t *p_extra = p_fmt->p_extra;
if( !p_data || p_fmt->i_extra < 2 || !p_extra )
return p_data; /* no data to construct the headers */
size_t frame_length = p_data->i_buffer + ADTS_HEADER_SIZE;
int i_index = ( (p_extra[0] << 1) | (p_extra[1] >> 7) ) & 0x0f;
int i_profile = (p_extra[0] >> 3) - 1; /* i_profile < 4 */
if( i_index == 0x0f && p_fmt->i_extra < 5 )
return p_data; /* not enough data */
int i_channels = (p_extra[i_index == 0x0f ? 4 : 1] >> 3) & 0x0f;
block_t *p_new_block = block_Realloc( p_data, ADTS_HEADER_SIZE,
p_data->i_buffer );
uint8_t *p_buffer = p_new_block->p_buffer;
/* fixed header */
p_buffer[0] = 0xff;
p_buffer[1] = 0xf1; /* 0xf0 | 0x00 | 0x00 | 0x01 */
p_buffer[2] = (i_profile << 6) | ((i_index & 0x0f) << 2) | ((i_channels >> 2) & 0x01) ;
p_buffer[3] = (i_channels << 6) | ((frame_length >> 11) & 0x03);
/* variable header (starts at last 2 bits of 4th byte) */
int i_fullness = 0x7ff; /* 0x7ff means VBR */
/* XXX: We should check if it's CBR or VBR, but no known implementation
* do that, and it's a pain to calculate this field */
p_buffer[4] = frame_length >> 3;
p_buffer[5] = ((frame_length & 0x07) << 5) | ((i_fullness >> 6) & 0x1f);
p_buffer[6] = ((i_fullness & 0x3f) << 2) /* | 0xfc */;
return p_new_block;
}
static int TSSchedule( sout_mux_t *p_mux, sout_buffer_chain_t *p_chain_ts,
vlc_tick_t i_pcr_length, vlc_tick_t i_pcr_dts )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
sout_buffer_chain_t new_chain;
int i_packet_count = p_chain_ts->i_depth;
BufferChainInit( &new_chain );
if ( unlikely(i_pcr_length <= 0) )
{
i_pcr_length = i_packet_count;
}
for (int i = 0; i < i_packet_count; i++ )
{
block_t *p_ts = BufferChainGet( p_chain_ts );
vlc_tick_t i_new_dts = i_pcr_dts + i_pcr_length * i / i_packet_count;
BufferChainAppend( &new_chain, p_ts );
if (!p_ts->i_dts || p_ts->i_dts + p_sys->i_dts_delay * 2/3 >= i_new_dts)
continue;
vlc_tick_t i_max_diff = i_new_dts - p_ts->i_dts;
vlc_tick_t i_cut_dts = p_ts->i_dts;
while( (p_ts = BufferChainPeek( p_chain_ts )) )
{
i_new_dts = i_pcr_dts + i_pcr_length * i++ / i_packet_count;
if( p_ts->i_dts >= i_pcr_dts &&
i_new_dts - p_ts->i_dts >= i_max_diff )
break;
p_ts = BufferChainGet( p_chain_ts );
BufferChainAppend( &new_chain, p_ts );
i_max_diff = i_new_dts - p_ts->i_dts;
i_cut_dts = p_ts->i_dts;
}
msg_Dbg( p_mux, "adjusting rate at %"PRId64"/%"PRId64" (%zu/%zu)",
i_cut_dts - i_pcr_dts, i_pcr_length, new_chain.i_depth,
p_chain_ts->i_depth );
int status = VLC_SUCCESS;
if( new_chain.i_depth )
{
status = TSDate( p_mux, &new_chain, i_cut_dts - i_pcr_dts,
i_pcr_dts );
}
if( p_chain_ts->i_depth && status == VLC_SUCCESS )
{
status = TSSchedule( p_mux, p_chain_ts,
i_pcr_dts + i_pcr_length - i_cut_dts,
i_cut_dts );
}
return status;
}
if ( new_chain.i_depth )
return TSDate( p_mux, &new_chain, i_pcr_length, i_pcr_dts );
return VLC_SUCCESS;
}
static int TSDate( sout_mux_t *p_mux, sout_buffer_chain_t *p_chain_ts,
vlc_tick_t i_pcr_length, vlc_tick_t i_pcr_dts )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
int i_packet_count = p_chain_ts->i_depth;
if ( unlikely(i_pcr_length / 1000 <= 0) )
{
/* This shouldn't happen, but happens in some rare heavy load
* and packet losses conditions. */
i_pcr_length = i_packet_count;
}
/* msg_Dbg( p_mux, "real pck=%d", i_packet_count ); */
block_t *p_list = NULL;
block_t **pp_last = &p_list;
for (int i = 0; i < i_packet_count; i++ )
{
block_t *p_ts = BufferChainGet( p_chain_ts );
vlc_tick_t i_new_dts = i_pcr_dts + i_pcr_length * i / i_packet_count;
p_ts->i_dts = i_new_dts;
p_ts->i_length = i_pcr_length / i_packet_count;
if( p_ts->i_flags & BLOCK_FLAG_FOR_PCR )
{
/* msg_Dbg( p_mux, "pcr=%lld ms", p_ts->i_dts / 1000 ); */
TSSetPCR( p_ts, p_ts->i_dts - p_sys->first_dts );
}
if( p_ts->i_flags & BLOCK_FLAG_SCRAMBLED )
{
vlc_mutex_lock( &p_sys->csa_lock );
csa_Encrypt( p_sys->csa, p_ts->p_buffer, p_sys->i_csa_pkt_size );
vlc_mutex_unlock( &p_sys->csa_lock );
}
/* latency */
p_ts->i_dts += p_sys->i_shaping_delay * 3 / 2;
block_ChainLastAppend( &pp_last, p_ts );
}
ssize_t written = 0;
if ( p_list != NULL )
written = sout_AccessOutWrite( p_mux->p_access, p_list );
return ( written == -1 ) ? VLC_EGENERIC : VLC_SUCCESS;
}
static block_t *TSNew( sout_mux_t *p_mux, sout_input_sys_t *p_stream,
bool b_pcr )
{
VLC_UNUSED(p_mux);
block_t *p_pes = p_stream->state.chain_pes.p_first;
bool b_new_pes = false;
bool b_adaptation_field = false;
int i_payload_max = 184 - ( b_pcr ? 8 : 0 );
if( p_stream->state.i_pes_used <= 0 )
{
b_new_pes = true;
}
int i_payload = __MIN( (int)p_pes->i_buffer - p_stream->state.i_pes_used,
i_payload_max );
if( b_pcr || i_payload < i_payload_max )
{
b_adaptation_field = true;
}
block_t *p_ts = block_Alloc( 188 );
if (b_new_pes && !(p_pes->i_flags & BLOCK_FLAG_NO_KEYFRAME) && p_pes->i_flags & BLOCK_FLAG_TYPE_I)
{
p_ts->i_flags |= BLOCK_FLAG_TYPE_I;
}
p_ts->i_dts = p_pes->i_dts;
p_ts->p_buffer[0] = 0x47;
p_ts->p_buffer[1] = ( b_new_pes ? 0x40 : 0x00 ) |
( ( p_stream->ts.i_pid >> 8 )&0x1f );
p_ts->p_buffer[2] = p_stream->ts.i_pid & 0xff;
p_ts->p_buffer[3] = ( b_adaptation_field ? 0x30 : 0x10 ) |
p_stream->ts.i_continuity_counter;
p_stream->ts.i_continuity_counter = (p_stream->ts.i_continuity_counter+1)%16;
p_stream->ts.b_discontinuity = p_pes->i_flags & BLOCK_FLAG_DISCONTINUITY;
if( b_adaptation_field )
{
int i_stuffing = i_payload_max - i_payload;
if( b_pcr )
{
p_ts->i_flags |= BLOCK_FLAG_FOR_PCR;
p_ts->p_buffer[4] = 7 + i_stuffing;
p_ts->p_buffer[5] = 1 << 4; /* PCR_flag */
if( p_stream->ts.b_discontinuity )
{
p_ts->p_buffer[5] |= 0x80; /* flag TS dicontinuity */
p_stream->ts.b_discontinuity = false;
}
memset(&p_ts->p_buffer[12], 0xff, i_stuffing);
}
else
{
p_ts->p_buffer[4] = --i_stuffing;
if( i_stuffing-- )
{
p_ts->p_buffer[5] = 0;
memset(&p_ts->p_buffer[6], 0xff, i_stuffing);
}
}
}
/* copy payload */
memcpy( &p_ts->p_buffer[188 - i_payload],
&p_pes->p_buffer[p_stream->state.i_pes_used], i_payload );
p_stream->state.i_pes_used += i_payload;
p_stream->state.i_pes_dts = p_pes->i_dts + p_pes->i_length *
p_stream->state.i_pes_used / p_pes->i_buffer;
p_stream->state.i_pes_length -= p_pes->i_length * i_payload / p_pes->i_buffer;
if( p_stream->state.i_pes_used >= (int)p_pes->i_buffer )
{
block_Release(BufferChainGet( &p_stream->state.chain_pes ));
p_pes = p_stream->state.chain_pes.p_first;
p_stream->state.i_pes_length = 0;
if( p_pes )
{
p_stream->state.i_pes_dts = p_pes->i_dts;
while( p_pes )
{
p_stream->state.i_pes_length += p_pes->i_length;
p_pes = p_pes->p_next;
}
}
else
{
p_stream->state.i_pes_dts = 0;
}
p_stream->state.i_pes_used = 0;
}
return p_ts;
}
static void TSSetPCR( block_t *p_ts, vlc_tick_t i_dts )
{
ts_90khz_t i_pcr = TO_SCALE_NZ(i_dts);
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[10] |= 0x7e;
p_ts->p_buffer[11] = 0; /* we don't set PCR extension */
}
void GetPAT( sout_mux_t *p_mux, sout_buffer_chain_t *c )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
BuildPAT( p_sys->p_dvbpsi,
c, BufferChainAppendCallback,
p_sys->i_tsid, p_sys->i_pat_version_number,
&p_sys->pat,
p_sys->i_num_pmt, p_sys->pmt, p_sys->i_pmt_program_number );
}
static void GetPMT( sout_mux_t *p_mux, sout_buffer_chain_t *c )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
pes_mapped_stream_t mapped[p_mux->i_nb_inputs];
for (int i_stream = 0; i_stream < p_mux->i_nb_inputs; i_stream++ )
{
sout_input_t *p_input = p_mux->pp_inputs[i_stream];
sout_input_sys_t *p_stream = (sout_input_sys_t*)p_input->p_sys;
int i_pidinput = p_input->p_fmt->i_id;
pmt_map_t *p_usepid = bsearch( &i_pidinput, p_sys->pmtmap,
p_sys->i_pmtslots, sizeof(pmt_map_t), intcompare );
/* If there's an error somewhere, dump it to the first pmt */
mapped[i_stream].i_mapped_prog = p_usepid ? p_usepid->i_prog : 0;
mapped[i_stream].fmt = p_input->p_fmt;
mapped[i_stream].pes = &p_stream->pes;
mapped[i_stream].ts = &p_stream->ts;
}
BuildPMT( p_sys->p_dvbpsi, VLC_OBJECT(p_mux), p_sys->standard,
c, BufferChainAppendCallback,
p_sys->i_tsid, p_sys->i_pmt_version_number,
((sout_input_sys_t *)p_sys->p_pcr_input->p_sys)->ts.i_pid,
&p_sys->sdt,
p_sys->i_num_pmt, p_sys->pmt, p_sys->i_pmt_program_number,
p_mux->i_nb_inputs, mapped );
}