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vlc-2-2
Commit 41823c03 authored by Christophe Massiot's avatar Christophe Massiot
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* modules/mux/mpeg/pes.c: Copy the flags of the data buffer to the PES 

  buffer.

* modules/mux/mpeg/ts.c:
  - rename the caching= option into shaping= since it more adequately
    describes what it does
  - new use-key-frames option, if enabled then shaping= will be a
    maximum value, if the algorithm find a new GOP it will finish with
    the first picture of the next GOP (helps minimizing the dts delay)
  - fixed a bug where the calculated sending time could be later than
    the real DTS time (meaning the decoder wouldn't get the buffer
    in time)
parent 81ec7faf
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Showing with 192 additions and 50 deletions
modules/mux/mpeg/pes.c
View file @ 41823c03
......@@ -2,7 +2,7 @@
* pes.c: PES packetizer used by the MPEG multiplexers
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
* $Id: pes.c,v 1.14 2003/12/10 23:16:04 gbazin Exp $
* $Id: pes.c,v 1.15 2004/03/03 11:34:41 massiot Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Eric Petit <titer@videolan.org>
......@@ -311,7 +311,7 @@ int E_( EStoPES )( sout_instance_t *p_sout,
} while( i_size > 0 );
/* sav some space */
/* save some space */
if( p_es_sav->i_size + 10*1024 < p_es_sav->i_buffer_size )
{
sout_BufferRealloc( p_sout, p_es_sav, p_es_sav->i_size );
......@@ -327,6 +327,7 @@ int E_( EStoPES )( sout_instance_t *p_sout,
i_dts += i_length;
}
(*pp_pes)->i_flags = p_es_sav->i_flags;
return( 0 );
}
......
modules/mux/mpeg/ts.c
View file @ 41823c03
......@@ -2,7 +2,7 @@
* ts.c: MPEG-II TS Muxer
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
* $Id: ts.c,v 1.45 2004/02/22 15:57:41 fenrir Exp $
* $Id: ts.c,v 1.46 2004/03/03 11:34:41 massiot Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Eric Petit <titer@videolan.org>
......@@ -93,15 +93,7 @@ vlc_module_begin();
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
* Local data structures
*****************************************************************************/
#define SOUT_BUFFER_FLAGS_PRIVATE_PCR ( 1 << SOUT_BUFFER_FLAGS_PRIVATE_SHIFT )
#define SOUT_BUFFER_FLAGS_PRIVATE_CSA ( 2 << SOUT_BUFFER_FLAGS_PRIVATE_SHIFT )
......@@ -148,6 +140,12 @@ static inline sout_buffer_t *BufferChainGet( sout_buffer_chain_t *c )
}
return b;
}
static inline sout_buffer_t *BufferChainPeek( sout_buffer_chain_t *c )
{
sout_buffer_t *b = c->p_first;
return b;
}
static inline void BufferChainClean( sout_instance_t *p_sout, sout_buffer_chain_t *c )
{
sout_buffer_t *b;
......@@ -159,7 +157,7 @@ static inline void BufferChainClean( sout_instance_t *p_sout, sout_buffer_chain_
BufferChainInit( c );
}
typedef struct ts_stream_s
typedef struct ts_stream_t
{
int i_pid;
int i_stream_type;
......@@ -183,6 +181,7 @@ typedef struct ts_stream_s
mtime_t i_pes_dts;
mtime_t i_pes_length;
int i_pes_used;
vlc_bool_t b_key_frame;
} ts_stream_t;
......@@ -212,11 +211,13 @@ struct sout_mux_sys_t
int64_t i_bitrate_min;
int64_t i_bitrate_max;
int64_t i_caching_delay;
int64_t i_shaping_delay;
int64_t i_pcr_delay;
int64_t i_dts_delay;
vlc_bool_t b_use_key_frames;
mtime_t i_pcr; /* last PCR emited */
csa_t *csa;
......@@ -244,6 +245,18 @@ static int AllocatePID( sout_mux_sys_t *p_sys, int i_cat )
return i_pid;
}
/*****************************************************************************
* Local 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 * );
static void TSSchedule ( sout_mux_t *p_mux, sout_buffer_chain_t *p_chain_ts,
mtime_t i_pcr_length, mtime_t i_pcr_dts );
static void TSDate ( sout_mux_t *p_mux, sout_buffer_chain_t *p_chain_ts,
mtime_t i_pcr_length, mtime_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 );
......@@ -337,16 +350,16 @@ static int Open( vlc_object_t *p_this )
msg_Err( p_mux, "bmin and bmax no more supported (if you need them report it)" );
}
p_sys->i_caching_delay = 200000;
if( ( val = sout_cfg_find_value( p_mux->p_cfg, "caching" ) ) )
p_sys->i_shaping_delay = 200000;
if( ( val = sout_cfg_find_value( p_mux->p_cfg, "shaping" ) ) )
{
p_sys->i_caching_delay = (int64_t)atoi( val ) * 1000;
if( p_sys->i_caching_delay <= 0 )
p_sys->i_shaping_delay = (int64_t)atoi( val ) * 1000;
if( p_sys->i_shaping_delay <= 0 )
{
msg_Err( p_mux,
"invalid caching ("I64Fd"ms) reseting to 200ms",
p_sys->i_caching_delay / 1000 );
p_sys->i_caching_delay = 200000;
"invalid shaping ("I64Fd"ms) reseting to 200ms",
p_sys->i_shaping_delay / 1000 );
p_sys->i_shaping_delay = 200000;
}
}
p_sys->i_pcr_delay = 30000;
......@@ -354,7 +367,7 @@ static int Open( vlc_object_t *p_this )
{
p_sys->i_pcr_delay = (int64_t)atoi( val ) * 1000;
if( p_sys->i_pcr_delay <= 0 ||
p_sys->i_pcr_delay >= p_sys->i_caching_delay )
p_sys->i_pcr_delay >= p_sys->i_shaping_delay )
{
msg_Err( p_mux,
"invalid pcr delay ("I64Fd"ms) reseting to 30ms",
......@@ -362,9 +375,11 @@ static int Open( vlc_object_t *p_this )
p_sys->i_pcr_delay = 30000;
}
}
msg_Dbg( p_mux, "caching="I64Fd" pcr="I64Fd,
p_sys->i_caching_delay, p_sys->i_pcr_delay );
p_sys->b_use_key_frames = 0;
if( sout_cfg_find( p_mux->p_cfg, "use-key-frames" ) )
{
p_sys->b_use_key_frames = 1;
}
p_sys->i_dts_delay = 200000;
if( ( val = sout_cfg_find_value( p_mux->p_cfg, "dts-delay" ) ) )
......@@ -372,6 +387,9 @@ static int Open( vlc_object_t *p_this )
p_sys->i_dts_delay = (int64_t)atoi( val ) * 1000;
}
msg_Dbg( p_mux, "shaping="I64Fd" pcr="I64Fd" dts_delay="I64Fd,
p_sys->i_shaping_delay, p_sys->i_pcr_delay, p_sys->i_dts_delay );
/* for TS generation */
p_sys->i_pcr = 0;
......@@ -398,7 +416,7 @@ static int Open( vlc_object_t *p_this )
val[8] = 0;
i_ck = ((int64_t)strtol( val, NULL, 16 )) << 32;
val[8] = ck[0];
i_ck += strtol( &val[8], NULL, 16 );
i_ck += (uint64_t)strtol( &val[8], NULL, 16 );
for( i = 0; i < 8; i++ )
{
ck[i] = ( i_ck >> ( 56 - 8*i) )&0xff;
......@@ -605,6 +623,7 @@ static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
p_stream->i_pes_dts = 0;
p_stream->i_pes_length = 0;
p_stream->i_pes_used = 0;
p_stream->b_key_frame = 0;
/* We only change PMT version (PAT isn't changed) */
p_sys->i_pmt_version_number = ( p_sys->i_pmt_version_number + 1 )%32;
......@@ -725,7 +744,7 @@ static int Mux( sout_mux_t *p_mux )
if( p_sys->i_pcr_pid == 0x1fff )
{
msg_Dbg( p_mux, "waiting PCR streams" );
msg_Dbg( p_mux, "waiting for PCR streams" );
msleep( 1000 );
return VLC_SUCCESS;
}
......@@ -738,23 +757,35 @@ static int Mux( sout_mux_t *p_mux )
int i_packet_pos;
mtime_t i_pcr_dts;
mtime_t i_pcr_length;
mtime_t i_shaping_delay;
int i;
if( p_pcr_stream->b_key_frame )
{
i_shaping_delay = p_pcr_stream->i_pes_length;
}
else
{
i_shaping_delay = p_sys->i_shaping_delay;
}
/* 1: get enough PES packet for all input */
for( ;; )
{
vlc_bool_t b_ok = VLC_TRUE;
sout_buffer_t *p_data;
/* Accumulate enough data in the pcr stream (>i_caching_delay) */
/* Accumulate enough data in the pcr stream (>i_shaping_delay) */
/* Accumulate enough data in all other stream ( >= length of pcr) */
for( i = 0; i < p_mux->i_nb_inputs; i++ )
{
sout_input_t *p_input = p_mux->pp_inputs[i];
ts_stream_t *p_stream = (ts_stream_t*)p_input->p_sys;
if( ( p_stream == p_pcr_stream && p_stream->i_pes_length <= p_sys->i_caching_delay ) ||
p_stream->i_pes_dts + p_stream->i_pes_length < p_pcr_stream->i_pes_dts + p_pcr_stream->i_pes_length )
if( ( p_stream == p_pcr_stream
&& p_stream->i_pes_length < i_shaping_delay ) ||
p_stream->i_pes_dts + p_stream->i_pes_length
< p_pcr_stream->i_pes_dts + p_pcr_stream->i_pes_length )
{
/* Need more data */
if( p_input->p_fifo->i_depth <= 1 )
......@@ -820,6 +851,15 @@ static int Mux( sout_mux_t *p_mux )
E_( EStoPES )( p_mux->p_sout, &p_data, p_data, p_stream->i_stream_id, 1 );
BufferChainAppend( &p_stream->chain_pes, p_data );
if( p_sys->b_use_key_frames && p_stream == p_pcr_stream
&& (p_data->i_flags & (BLOCK_FLAG_TYPE_I
<< SOUT_BUFFER_FLAGS_BLOCK_SHIFT))
&& (p_stream->i_pes_length > 300000) )
{
i_shaping_delay = p_stream->i_pes_length;
p_stream->b_key_frame = 1;
}
}
}
}
......@@ -833,6 +873,7 @@ static int Mux( sout_mux_t *p_mux )
/* save */
i_pcr_dts = p_pcr_stream->i_pes_dts;
i_pcr_length = p_pcr_stream->i_pes_length;
p_pcr_stream->b_key_frame = 0;
/* msg_Dbg( p_mux, "starting muxing %lldms", i_pcr_length / 1000 ); */
/* 2: calculate non accurate total size of muxed ts */
......@@ -842,7 +883,7 @@ static int Mux( sout_mux_t *p_mux )
ts_stream_t *p_stream = (ts_stream_t*)p_mux->pp_inputs[i]->p_sys;
sout_buffer_t *p_pes;
/* False for pcr stream but it will be eough to do PCR algo */
/* False for pcr stream but it will be enough to do PCR algo */
for( p_pes = p_stream->chain_pes.p_first; p_pes != NULL; p_pes = p_pes->p_next )
{
int i_size = p_pes->i_size;
......@@ -880,7 +921,7 @@ static int Mux( sout_mux_t *p_mux )
sout_buffer_t *p_ts;
vlc_bool_t b_pcr;
/* Select stream (lowest dts)*/
/* Select stream (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;
......@@ -925,31 +966,130 @@ static int Mux( sout_mux_t *p_mux )
}
/* 4: date and send */
i_packet_count = chain_ts.i_depth;
TSSchedule( p_mux, &chain_ts, i_pcr_length, i_pcr_dts );
}
}
static void TSSchedule( sout_mux_t *p_mux, sout_buffer_chain_t *p_chain_ts,
mtime_t i_pcr_length, mtime_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;
int i;
BufferChainInit( &new_chain );
if ( i_pcr_length <= 0 )
{
i_pcr_length = i_packet_count;
}
for( i = 0; i < i_packet_count; i++ )
{
sout_buffer_t *p_ts = BufferChainGet( p_chain_ts );
mtime_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 )
{
mtime_t i_max_diff = i_new_dts - p_ts->i_dts;
mtime_t i_cut_dts = p_ts->i_dts;
p_ts = BufferChainPeek( p_chain_ts );
i++;
i_new_dts = i_pcr_dts + i_pcr_length * i / i_packet_count;
while ( p_ts != NULL && i_new_dts - p_ts->i_dts >= i_max_diff )
{
p_ts = BufferChainGet( p_chain_ts );
i_max_diff = i_new_dts - p_ts->i_dts;
i_cut_dts = p_ts->i_dts;
BufferChainAppend( &new_chain, p_ts );
p_ts = BufferChainPeek( p_chain_ts );
i++;
i_new_dts = i_pcr_dts + i_pcr_length * i / i_packet_count;
}
msg_Dbg( p_mux, "adjusting rate at "I64Fd"/"I64Fd" (%d/%d)",
i_cut_dts - i_pcr_dts, i_pcr_length, new_chain.i_depth,
p_chain_ts->i_depth );
if ( new_chain.i_depth )
TSDate( p_mux, &new_chain,
i_cut_dts - i_pcr_dts,
i_pcr_dts );
if ( p_chain_ts->i_depth )
TSSchedule( p_mux,
p_chain_ts, i_pcr_dts + i_pcr_length - i_cut_dts,
i_cut_dts );
return;
}
}
if ( new_chain.i_depth )
TSDate( p_mux, &new_chain, i_pcr_length, i_pcr_dts );
}
static void TSDate( sout_mux_t *p_mux, sout_buffer_chain_t *p_chain_ts,
mtime_t i_pcr_length, mtime_t i_pcr_dts )
{
sout_mux_sys_t *p_sys = p_mux->p_sys;
int i_packet_count = p_chain_ts->i_depth;
int i;
if ( i_pcr_length > 0 )
{
int i_bitrate = ((uint64_t)i_packet_count * 188 * 8000)
/ (uint64_t)(i_pcr_length / 1000);
if ( p_sys->i_bitrate_max && p_sys->i_bitrate_max < i_bitrate )
{
msg_Warn( p_mux,
"max bitrate exceeded at %lld (%d bi/s for %d pkt in %lld us)",
i_pcr_dts + p_sys->i_shaping_delay * 3 / 2 - mdate(),
i_bitrate, i_packet_count, i_pcr_length);
}
#if 0
else
{
msg_Dbg( p_mux,
"starting at %lld (%d bi/s for %d packets in %lld us)",
i_pcr_dts + p_sys->i_shaping_delay * 3 / 2 - mdate(),
i_bitrate, i_packet_count, i_pcr_length);
}
#endif
}
else
{
/* 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 ); */
for( i = 0; i < i_packet_count; i++ )
{
sout_buffer_t *p_ts = BufferChainGet( &chain_ts );
sout_buffer_t *p_ts = BufferChainGet( p_chain_ts );
mtime_t i_new_dts = i_pcr_dts + i_pcr_length * i / i_packet_count;
p_ts->i_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&SOUT_BUFFER_FLAGS_PRIVATE_PCR )
if( p_ts->i_flags & SOUT_BUFFER_FLAGS_PRIVATE_PCR )
{
/* msg_Dbg( p_mux, "pcr=%lld ms", p_ts->i_dts / 1000 ); */
TSSetPCR( p_ts, p_ts->i_dts - p_sys->i_dts_delay );
}
if( p_ts->i_flags&SOUT_BUFFER_FLAGS_PRIVATE_CSA )
if( p_ts->i_flags & SOUT_BUFFER_FLAGS_PRIVATE_CSA )
{
csa_Encrypt( p_sys->csa, p_ts->p_buffer, 0 );
}
/* latency */
p_ts->i_dts += 3*p_sys->i_caching_delay/2;
p_ts->i_dts += p_sys->i_shaping_delay * 3 / 2;
sout_AccessOutWrite( p_mux->p_access, p_ts );
}
}
}
static sout_buffer_t *TSNew( sout_mux_t *p_mux, ts_stream_t *p_stream, vlc_bool_t b_pcr )
......@@ -975,6 +1115,7 @@ static sout_buffer_t *TSNew( sout_mux_t *p_mux, ts_stream_t *p_stream, vlc_bool_
}
p_ts = sout_BufferNew( p_mux->p_sout, 188 );
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->i_pid >> 8 )&0x1f );
......
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