ps.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:26k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * ps.c: MPEG PS (ISO/IEC 13818-1) / MPEG SYSTEM (ISO/IEC 1172-1)
- * multiplexer module for vlc
- *****************************************************************************
- * Copyright (C) 2001, 2002 the VideoLAN team
- * $Id: f2ec618a204dc27af8763fd969c2f37ef9495506 $
- *
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- * Eric Petit <titer@videolan.org>
- * Gildas Bazin <gbazin@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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include <vlc_plugin.h>
- #include <vlc_sout.h>
- #include <vlc_codecs.h>
- #include <vlc_block.h>
- #include "bits.h"
- #include "pes.h"
- #include <vlc_iso_lang.h>
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- #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 SCRs. This allows for some buffering inside "
- "the client decoder.")
- #define PES_SIZE_TEXT N_("PES maximum size")
- #define PES_SIZE_LONGTEXT N_("Set the maximum allowed PES "
- "size when producing the MPEG PS streams.")
- static int Open ( vlc_object_t * );
- static void Close ( vlc_object_t * );
- #define SOUT_CFG_PREFIX "sout-ps-"
- vlc_module_begin ()
- set_description( N_("PS muxer") )
- set_shortname( "MPEG-PS" )
- set_category( CAT_SOUT )
- set_subcategory( SUBCAT_SOUT_MUX )
- set_capability( "sout mux", 50 )
- add_shortcut( "ps" )
- add_shortcut( "mpeg1" )
- add_shortcut( "dvd" )
- set_callbacks( Open, Close )
- add_integer( SOUT_CFG_PREFIX "dts-delay", 200, NULL, DTS_TEXT,
- DTS_LONGTEXT, true )
- add_integer( SOUT_CFG_PREFIX "pes-max-size", PES_PAYLOAD_SIZE_MAX, NULL,
- PES_SIZE_TEXT, PES_SIZE_LONGTEXT, true )
- vlc_module_end ()
- /*****************************************************************************
- * Exported prototypes
- *****************************************************************************/
- static int Control ( sout_mux_t *, int, va_list );
- 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
- *****************************************************************************/
- static int MuxGetStream ( sout_mux_t *, int *, mtime_t * );
- static void MuxWritePackHeader ( sout_mux_t *, block_t **, mtime_t );
- static void MuxWriteSystemHeader( sout_mux_t *, block_t **, mtime_t );
- static void MuxWritePSM ( sout_mux_t *, block_t **, mtime_t );
- static void StreamIdInit ( bool *id, int i_range );
- static int StreamIdGet ( bool *id, int i_id_min, int i_id_max );
- static void StreamIdRelease ( bool *id, int i_id_min, int i_id );
- typedef struct ps_stream_s
- {
- int i_stream_id;
- int i_stream_type;
- int i_max_buff_size; /* used in system header */
- /* Language is iso639-2T */
- uint8_t lang[3];
- } ps_stream_t;
- struct sout_mux_sys_t
- {
- /* Which id are unused */
- bool stream_id_mpga[16]; /* 0xc0 -> 0xcf */
- bool stream_id_mpgv[16]; /* 0xe0 -> 0xef */
- bool stream_id_a52[8]; /* 0x80 -> 0x87 <- FIXME I'm not sure */
- bool stream_id_spu[32]; /* 0x20 -> 0x3f */
- bool stream_id_dts[8]; /* 0x88 -> 0x8f */
- bool stream_id_lpcm[16]; /* 0xa0 -> 0xaf */
- int i_audio_bound;
- int i_video_bound;
- int i_pes_count;
- int i_system_header;
- int i_dts_delay;
- int i_rate_bound; /* units of 50 bytes/second */
- int64_t i_instant_bitrate;
- int64_t i_instant_size;
- int64_t i_instant_dts;
- bool b_mpeg2;
- int i_pes_max_size;
- int i_psm_version;
- uint32_t crc32_table[256];
- };
- static const char *const ppsz_sout_options[] = {
- "dts-delay", "pes-max-size", NULL
- };
- /*****************************************************************************
- * 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;
- vlc_value_t val;
- msg_Info( p_mux, "Open" );
- config_ChainParse( p_mux, SOUT_CFG_PREFIX, ppsz_sout_options, p_mux->p_cfg );
- p_mux->pf_control = Control;
- p_mux->pf_addstream = AddStream;
- p_mux->pf_delstream = DelStream;
- p_mux->pf_mux = Mux;
- p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
- /* Init free stream id */
- StreamIdInit( p_sys->stream_id_a52, 8 );
- StreamIdInit( p_sys->stream_id_dts, 8 );
- StreamIdInit( p_sys->stream_id_mpga, 16 );
- StreamIdInit( p_sys->stream_id_mpgv, 16 );
- StreamIdInit( p_sys->stream_id_lpcm, 16 );
- StreamIdInit( p_sys->stream_id_spu, 32 );
- p_sys->i_audio_bound = 0;
- p_sys->i_video_bound = 0;
- p_sys->i_system_header = 0;
- p_sys->i_pes_count = 0;
- p_sys->i_psm_version = 0;
- p_sys->i_instant_bitrate = 0;
- p_sys->i_instant_size = 0;
- p_sys->i_instant_dts = 0;
- p_sys->i_rate_bound = 0;
- p_sys->b_mpeg2 = !(p_mux->psz_mux && !strcmp( p_mux->psz_mux, "mpeg1" ));
- var_Get( p_mux, SOUT_CFG_PREFIX "dts-delay", &val );
- p_sys->i_dts_delay = (int64_t)val.i_int * 1000;
- var_Get( p_mux, SOUT_CFG_PREFIX "pes-max-size", &val );
- p_sys->i_pes_max_size = (int64_t)val.i_int;
- /* Initialise CRC32 table */
- if( p_sys->b_mpeg2 )
- {
- uint32_t i, j, k;
- for( i = 0; i < 256; i++ )
- {
- k = 0;
- for( j = (i << 24) | 0x800000; j != 0x80000000; j <<= 1 )
- k = (k << 1) ^ (((k ^ j) & 0x80000000) ? 0x04c11db7 : 0);
- p_sys->crc32_table[i] = k;
- }
- }
- 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;
- block_t *p_end;
- msg_Info( p_mux, "Close" );
- p_end = block_New( p_mux, 4 );
- p_end->p_buffer[0] = 0x00; p_end->p_buffer[1] = 0x00;
- p_end->p_buffer[2] = 0x01; p_end->p_buffer[3] = 0xb9;
- sout_AccessOutWrite( p_mux->p_access, p_end );
- free( p_sys );
- }
- /*****************************************************************************
- * 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 = (bool*)va_arg( args, bool * );
- *pb_bool = true;
- return VLC_SUCCESS;
- case MUX_GET_ADD_STREAM_WAIT:
- pb_bool = (bool*)va_arg( args, bool * );
- *pb_bool = false;
- return VLC_SUCCESS;
- case MUX_GET_MIME:
- ppsz = (char**)va_arg( args, char ** );
- *ppsz = strdup( "video/mpeg" );
- return VLC_SUCCESS;
- default:
- return VLC_EGENERIC;
- }
- }
- /*****************************************************************************
- * AddStream:
- *****************************************************************************/
- static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
- {
- sout_mux_sys_t *p_sys = p_mux->p_sys;
- ps_stream_t *p_stream;
- msg_Dbg( p_mux, "adding input codec=%4.4s",
- (char*)&p_input->p_fmt->i_codec );
- p_input->p_sys = p_stream = malloc( sizeof( ps_stream_t ) );
- p_stream->i_stream_type = 0x81;
- /* Init this new stream */
- switch( p_input->p_fmt->i_codec )
- {
- case VLC_FOURCC( 'm', 'p', '1', 'v' ):
- p_stream->i_stream_id =
- StreamIdGet( p_sys->stream_id_mpgv, 0xe0, 0xef );
- p_stream->i_stream_type = 0x01; /* ISO/IEC 11172 Video */
- break;
- case VLC_FOURCC( 'm', 'p', '2', 'v' ):
- case VLC_FOURCC( 'm', 'p', 'g', 'v' ):
- p_stream->i_stream_id =
- StreamIdGet( p_sys->stream_id_mpgv, 0xe0, 0xef );
- p_stream->i_stream_type = 0x02; /* ISO/IEC 13818 Video */
- break;
- case VLC_FOURCC( 'm', 'p', '4', 'v' ):
- p_stream->i_stream_id =
- StreamIdGet( p_sys->stream_id_mpgv, 0xe0, 0xef );
- p_stream->i_stream_type = 0x10;
- break;
- case VLC_FOURCC( 'h', '2', '6', '4' ):
- p_stream->i_stream_id =
- StreamIdGet( p_sys->stream_id_mpgv, 0xe0, 0xef );
- p_stream->i_stream_type = 0x1b;
- break;
- case VLC_FOURCC( 'l', 'p', 'c', 'm' ):
- p_stream->i_stream_id =
- 0xbd00 | StreamIdGet( p_sys->stream_id_lpcm, 0xa0, 0xaf );
- break;
- case VLC_FOURCC( 'd', 't', 's', ' ' ):
- p_stream->i_stream_id =
- 0xbd00 | StreamIdGet( p_sys->stream_id_dts, 0x88, 0x8f );
- break;
- case VLC_FOURCC( 'a', '5', '2', ' ' ):
- p_stream->i_stream_id =
- 0xbd00 | StreamIdGet( p_sys->stream_id_a52, 0x80, 0x87 );
- break;
- case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
- case VLC_FOURCC( 'm', 'p', '3', ' ' ):
- p_stream->i_stream_id =
- StreamIdGet( p_sys->stream_id_mpga, 0xc0, 0xcf );
- p_stream->i_stream_type = 0x03; /* ISO/IEC 11172 Audio */
- break;
- case VLC_FOURCC( 'm', 'p', '4', 'a' ):
- p_stream->i_stream_id =
- StreamIdGet( p_sys->stream_id_mpga, 0xc0, 0xcf );
- p_stream->i_stream_type = 0x0f;
- break;
- case VLC_FOURCC( 's', 'p', 'u', ' ' ):
- p_stream->i_stream_id =
- 0xbd00 | StreamIdGet( p_sys->stream_id_spu, 0x20, 0x3f );
- break;
- default:
- goto error;
- }
- if( p_stream->i_stream_id < 0 ) goto error;
- if( p_input->p_fmt->i_cat == AUDIO_ES )
- {
- p_sys->i_audio_bound++;
- p_stream->i_max_buff_size = 4 * 1024;
- }
- else if( p_input->p_fmt->i_cat == VIDEO_ES )
- {
- p_sys->i_video_bound++;
- p_stream->i_max_buff_size = 400 * 1024; /* FIXME -- VCD uses 46, SVCD
- uses 230, ffmpeg has 230 with a note that it is small */
- }
- else
- { /* FIXME -- what's valid for not audio or video? */
- p_stream->i_max_buff_size = 4 * 1024;
- }
- /* Try to set a sensible default value for the instant bitrate */
- p_sys->i_instant_bitrate += p_input->p_fmt->i_bitrate + 1000/* overhead */;
- /* FIXME -- spec requires an upper limit rate boundary in the system header;
- our codecs are VBR; using 2x nominal rate, convert to 50 bytes/sec */
- p_sys->i_rate_bound += p_input->p_fmt->i_bitrate * 2 / (8 * 50);
- p_sys->i_psm_version++;
- p_stream->lang[0] = p_stream->lang[1] = p_stream->lang[2] = 0;
- if( p_input->p_fmt->psz_language )
- {
- char *psz = p_input->p_fmt->psz_language;
- const iso639_lang_t *pl = NULL;
- if( strlen( psz ) == 2 )
- {
- pl = GetLang_1( psz );
- }
- else if( strlen( psz ) == 3 )
- {
- pl = GetLang_2B( psz );
- if( !strcmp( pl->psz_iso639_1, "??" ) )
- {
- pl = GetLang_2T( psz );
- }
- }
- if( pl && strcmp( pl->psz_iso639_1, "??" ) )
- {
- p_stream->lang[0] = pl->psz_iso639_2T[0];
- p_stream->lang[1] = pl->psz_iso639_2T[1];
- p_stream->lang[2] = pl->psz_iso639_2T[2];
- msg_Dbg( p_mux, " - lang=%c%c%c",
- p_stream->lang[0], p_stream->lang[1], p_stream->lang[2] );
- }
- }
- return VLC_SUCCESS;
- error:
- free( p_stream );
- return VLC_EGENERIC;
- }
- /*****************************************************************************
- * DelStream:
- *****************************************************************************/
- static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
- {
- sout_mux_sys_t *p_sys = p_mux->p_sys;
- ps_stream_t *p_stream =(ps_stream_t*)p_input->p_sys;
- msg_Dbg( p_mux, "removing input" );
- switch( p_input->p_fmt->i_codec )
- {
- case VLC_FOURCC( 'm', 'p', 'g', 'v' ):
- StreamIdRelease( p_sys->stream_id_mpgv, 0xe0,
- p_stream->i_stream_id );
- break;
- case VLC_FOURCC( 'l', 'p', 'c', 'm' ):
- StreamIdRelease( p_sys->stream_id_lpcm, 0xa0,
- p_stream->i_stream_id&0xff );
- break;
- case VLC_FOURCC( 'd', 't', 's', ' ' ):
- StreamIdRelease( p_sys->stream_id_dts, 0x88,
- p_stream->i_stream_id&0xff );
- break;
- case VLC_FOURCC( 'a', '5', '2', ' ' ):
- StreamIdRelease( p_sys->stream_id_a52, 0x80,
- p_stream->i_stream_id&0xff );
- break;
- case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
- StreamIdRelease( p_sys->stream_id_mpga, 0xc0,
- p_stream->i_stream_id );
- break;
- case VLC_FOURCC( 's', 'p', 'u', ' ' ):
- StreamIdRelease( p_sys->stream_id_spu, 0x20,
- p_stream->i_stream_id&0xff );
- break;
- default:
- /* Never reached */
- break;
- }
- if( p_input->p_fmt->i_cat == AUDIO_ES )
- {
- p_sys->i_audio_bound--;
- }
- else if( p_input->p_fmt->i_cat == VIDEO_ES )
- {
- p_sys->i_video_bound--;
- }
- /* Try to set a sensible default value for the instant bitrate */
- p_sys->i_instant_bitrate -= (p_input->p_fmt->i_bitrate + 1000);
- /* rate_bound is in units of 50 bytes/second */
- p_sys->i_rate_bound -= (p_input->p_fmt->i_bitrate * 2)/(8 * 50);
- p_sys->i_psm_version++;
- free( p_stream );
- 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;
- for( ;; )
- {
- sout_input_t *p_input;
- ps_stream_t *p_stream;
- block_t *p_ps, *p_data;
- mtime_t i_dts;
- int i_stream;
- /* Choose which stream to mux */
- if( MuxGetStream( p_mux, &i_stream, &i_dts ) )
- {
- return VLC_SUCCESS;
- }
- p_input = p_mux->pp_inputs[i_stream];
- p_stream = (ps_stream_t*)p_input->p_sys;
- p_ps = NULL;
- /* Write regulary PackHeader */
- if( p_sys->i_pes_count % 30 == 0)
- {
- /* Update the instant bitrate every second or so */
- if( p_sys->i_instant_size &&
- i_dts - p_sys->i_instant_dts > 1000000 )
- {
- int64_t i_instant_bitrate = p_sys->i_instant_size * 8000000 /
- ( i_dts - p_sys->i_instant_dts );
- p_sys->i_instant_bitrate += i_instant_bitrate;
- p_sys->i_instant_bitrate /= 2;
- p_sys->i_instant_size = 0;
- p_sys->i_instant_dts = i_dts;
- }
- else if( !p_sys->i_instant_size )
- {
- p_sys->i_instant_dts = i_dts;
- }
- MuxWritePackHeader( p_mux, &p_ps, i_dts );
- }
- /* Write regulary SystemHeader */
- if( p_sys->i_pes_count % 300 == 0 )
- {
- block_t *p_pk;
- MuxWriteSystemHeader( p_mux, &p_ps, i_dts );
- /* For MPEG1 streaming, set HEADER flag */
- for( p_pk = p_ps; p_pk != NULL; p_pk = p_pk->p_next )
- {
- p_pk->i_flags |= BLOCK_FLAG_HEADER;
- }
- }
- /* Write regulary ProgramStreamMap */
- if( p_sys->b_mpeg2 && p_sys->i_pes_count % 300 == 0 )
- {
- MuxWritePSM( p_mux, &p_ps, i_dts );
- }
- /* Get and mux a packet */
- p_data = block_FifoGet( p_input->p_fifo );
- EStoPES ( p_mux->p_sout, &p_data, p_data,
- p_input->p_fmt, p_stream->i_stream_id,
- p_sys->b_mpeg2, 0, 0, p_sys->i_pes_max_size );
- block_ChainAppend( &p_ps, p_data );
- /* Get size of output data so we can calculate the instant bitrate */
- for( p_data = p_ps; p_data; p_data = p_data->p_next )
- {
- p_sys->i_instant_size += p_data->i_buffer;
- }
- sout_AccessOutWrite( p_mux->p_access, p_ps );
- /* Increase counter */
- p_sys->i_pes_count++;
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- *
- *****************************************************************************/
- static void StreamIdInit( bool *id, int i_range )
- {
- int i;
- for( i = 0; i < i_range; i++ )
- {
- id[i] = true;
- }
- }
- static int StreamIdGet( bool *id, int i_id_min, int i_id_max )
- {
- int i;
- for( i = 0; i <= i_id_max - i_id_min; i++ )
- {
- if( id[i] )
- {
- id[i] = false;
- return i_id_min + i;
- }
- }
- return -1;
- }
- static void StreamIdRelease( bool *id, int i_id_min, int i_id )
- {
- id[i_id - i_id_min] = true;
- }
- static void MuxWritePackHeader( sout_mux_t *p_mux, block_t **p_buf,
- mtime_t i_dts )
- {
- sout_mux_sys_t *p_sys = p_mux->p_sys;
- bits_buffer_t bits;
- block_t *p_hdr;
- mtime_t i_scr;
- int i_mux_rate;
- i_scr = (i_dts - p_sys->i_dts_delay) * 9 / 100;
- p_hdr = block_New( p_mux, 18 );
- p_hdr->i_pts = p_hdr->i_dts = i_dts;
- bits_initwrite( &bits, 14, p_hdr->p_buffer );
- bits_write( &bits, 32, 0x01ba );
- /* The spec specifies that the mux rate must be rounded upwards */
- i_mux_rate = (p_sys->i_instant_bitrate + 8 * 50 - 1 ) / (8 * 50);
- if( p_sys->b_mpeg2 )
- {
- bits_write( &bits, 2, 0x01 );
- }
- else
- {
- bits_write( &bits, 4, 0x02 );
- }
- bits_write( &bits, 3, ( i_scr >> 30 )&0x07 );
- bits_write( &bits, 1, 1 ); // marker
- bits_write( &bits, 15, ( i_scr >> 15 )&0x7fff );
- bits_write( &bits, 1, 1 ); // marker
- bits_write( &bits, 15, i_scr&0x7fff );
- bits_write( &bits, 1, 1 ); // marker
- if( p_sys->b_mpeg2 )
- {
- bits_write( &bits, 9, 0 ); // src extension
- }
- bits_write( &bits, 1, 1 ); // marker
- bits_write( &bits, 22, i_mux_rate);
- bits_write( &bits, 1, 1 ); // marker
- if( p_sys->b_mpeg2 )
- {
- bits_write( &bits, 1, 1 ); // marker
- bits_write( &bits, 5, 0x1f ); // reserved
- bits_write( &bits, 3, 0 ); // stuffing bytes
- }
- p_hdr->i_buffer = p_sys->b_mpeg2 ? 14: 12;
- block_ChainAppend( p_buf, p_hdr );
- }
- static void MuxWriteSystemHeader( sout_mux_t *p_mux, block_t **p_buf,
- mtime_t i_dts )
- {
- sout_mux_sys_t *p_sys = p_mux->p_sys;
- block_t *p_hdr;
- bits_buffer_t bits;
- bool b_private;
- int i_rate_bound;
- int i_nb_private, i_nb_stream;
- int i;
- /* Count the number of private stream */
- for( i = 0, i_nb_private = 0; i < p_mux->i_nb_inputs; i++ )
- {
- ps_stream_t *p_stream;
- p_stream = (ps_stream_t*)p_mux->pp_inputs[i]->p_sys;
- if( ( p_stream->i_stream_id&0xff00 ) == 0xbd00 )
- {
- i_nb_private++;
- }
- }
- /* Private stream are declared only one time */
- i_nb_stream = p_mux->i_nb_inputs -
- ( i_nb_private > 0 ? i_nb_private - 1 : 0 );
- p_hdr = block_New( p_mux, 12 + i_nb_stream * 3 );
- p_hdr->i_dts = p_hdr->i_pts = i_dts;
- /* The spec specifies that the reported rate_bound must be upper limit */
- i_rate_bound = (p_sys->i_rate_bound);
- bits_initwrite( &bits, 12 + i_nb_stream * 3, p_hdr->p_buffer );
- bits_write( &bits, 32, 0x01bb );
- bits_write( &bits, 16, 12 - 6 + i_nb_stream * 3 );
- bits_write( &bits, 1, 1 ); // marker bit
- bits_write( &bits, 22, i_rate_bound);
- bits_write( &bits, 1, 1 ); // marker bit
- bits_write( &bits, 6, p_sys->i_audio_bound );
- bits_write( &bits, 1, 0 ); // fixed flag
- bits_write( &bits, 1, 0 ); // CSPS flag
- bits_write( &bits, 1, 0 ); // system audio lock flag
- bits_write( &bits, 1, 0 ); // system video lock flag
- bits_write( &bits, 1, 1 ); // marker bit
- bits_write( &bits, 5, p_sys->i_video_bound );
- bits_write( &bits, 1, 1 ); // packet rate restriction flag (1 for mpeg1)
- bits_write( &bits, 7, 0xff ); // reserved bits
- /* stream_id table */
- for( i = 0, b_private = false; i < p_mux->i_nb_inputs; i++ )
- {
- sout_input_t *p_input;
- ps_stream_t *p_stream;
- p_input = p_mux->pp_inputs[i];
- p_stream = (ps_stream_t *)p_input->p_sys;
- if( ( p_stream->i_stream_id&0xff00 ) == 0xbd00 )
- {
- if( b_private )
- {
- continue;
- }
- b_private = true;
- /* Write stream id */
- bits_write( &bits, 8, 0xbd );
- }
- else
- {
- /* Write stream id */
- bits_write( &bits, 8, p_stream->i_stream_id&0xff );
- }
- bits_write( &bits, 2, 0x03 ); /* reserved */
- if( p_input->p_fmt->i_cat == AUDIO_ES )
- {
- bits_write( &bits, 1, 0 );
- bits_write( &bits, 13, p_stream->i_max_buff_size / 128 );
- }
- else if( p_input->p_fmt->i_cat == VIDEO_ES )
- {
- bits_write( &bits, 1, 1 );
- bits_write( &bits, 13, p_stream->i_max_buff_size / 1024);
- }
- else
- {
- /* FIXME -- the scale of 0 means do a /128 */
- bits_write( &bits, 1, 0 );
- bits_write( &bits, 13, p_stream->i_max_buff_size / 128 );
- }
- }
- block_ChainAppend( p_buf, p_hdr );
- }
- static void MuxWritePSM( sout_mux_t *p_mux, block_t **p_buf, mtime_t i_dts )
- {
- sout_mux_sys_t *p_sys = p_mux->p_sys;
- block_t *p_hdr;
- bits_buffer_t bits;
- int i, i_psm_size = 16, i_es_map_size = 0;
- for( i = 0; i < p_mux->i_nb_inputs; i++ )
- {
- sout_input_t *p_input = p_mux->pp_inputs[i];
- ps_stream_t *p_stream = p_input->p_sys;
- i_es_map_size += 4;
- if( p_stream->lang[0] != 0 ) i_es_map_size += 6;
- }
- i_psm_size += i_es_map_size;
- p_hdr = block_New( p_mux, i_psm_size );
- p_hdr->i_dts = p_hdr->i_pts = i_dts;
- memset( p_hdr->p_buffer, 0, p_hdr->i_buffer );
- bits_initwrite( &bits, i_psm_size, p_hdr->p_buffer );
- bits_write( &bits, 32, 0x01bc );
- bits_write( &bits, 16, i_psm_size - 6 );
- bits_write( &bits, 1, 1 ); /* current_next_indicator */
- bits_write( &bits, 2, 0xF ); /* reserved */
- bits_write( &bits, 5, p_sys->i_psm_version );
- bits_write( &bits, 7, 0xFF ); /* reserved */
- bits_write( &bits, 1, 1 ); /* marker */
- bits_write( &bits, 16, 0 ); /* program_stream_info_length */
- /* empty */
- bits_write( &bits, 16, i_es_map_size ); /* elementary_stream_map_length */
- for( i = 0; i < p_mux->i_nb_inputs; i++ )
- {
- sout_input_t *p_input = p_mux->pp_inputs[i];
- ps_stream_t *p_stream = p_input->p_sys;
- bits_write( &bits, 8, p_stream->i_stream_type ); /* stream_type */
- bits_write( &bits, 8, p_stream->i_stream_id ); /* elementary_stream_id */
- /* ISO639 language descriptor */
- if( p_stream->lang[0] != 0 )
- {
- bits_write( &bits, 16, 6 ); /* elementary_stream_info_length */
- bits_write( &bits, 8, 0x0a ); /* descriptor_tag */
- bits_write( &bits, 8, 4 ); /* descriptor_length */
- bits_write( &bits, 8, p_stream->lang[0] );
- bits_write( &bits, 8, p_stream->lang[1] );
- bits_write( &bits, 8, p_stream->lang[2] );
- bits_write( &bits, 8, 0 ); /* audio type: 0x00 undefined */
- }
- else
- {
- bits_write( &bits, 16, 0 ); /* elementary_stream_info_length */
- }
- }
- /* CRC32 */
- {
- uint32_t i_crc = 0xffffffff;
- for( i = 0; (size_t)i < p_hdr->i_buffer; i++ )
- i_crc = (i_crc << 8) ^
- p_sys->crc32_table[((i_crc >> 24) ^ p_hdr->p_buffer[i]) & 0xff];
- bits_write( &bits, 32, i_crc );
- }
- block_ChainAppend( p_buf, p_hdr );
- }
- /*
- * Find stream to be muxed.
- */
- static int MuxGetStream( sout_mux_t *p_mux, int *pi_stream, mtime_t *pi_dts )
- {
- mtime_t i_dts;
- int i_stream, i;
- for( i = 0, i_dts = 0, i_stream = -1; i < p_mux->i_nb_inputs; i++ )
- {
- sout_input_t *p_input = p_mux->pp_inputs[i];
- block_t *p_data;
- if( block_FifoCount( p_input->p_fifo ) <= 0 )
- {
- if( p_input->p_fmt->i_cat == AUDIO_ES ||
- p_input->p_fmt->i_cat == VIDEO_ES )
- {
- /* We need that audio+video fifo contain at least 1 packet */
- return VLC_EGENERIC;
- }
- /* SPU */
- continue;
- }
- p_data = block_FifoShow( p_input->p_fifo );
- if( i_stream == -1 || p_data->i_dts < i_dts )
- {
- i_stream = i;
- i_dts = p_data->i_dts;
- }
- }
- *pi_stream = i_stream;
- *pi_dts = i_dts;
- return VLC_SUCCESS;
- }