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Commit 910f40f9 authored by Henri Fallon's avatar Henri Fallon
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TS Input :
- Added DemuxPSI, DecodePAT and DecodePMT. Never tested which streams
  where PAT or PMT are splitted in more than one section.
- Some TS files still don't work (matrix.ts i.e : no sound ),
  others do ... i'll have to investigate.

Todo :
- What if data get unaligned ?
- Write NetworkOpen
- Try to find why I get no sound on matrix.ts
- Support Stream and program selection.
parent 9584da59
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Showing with 399 additions and 98 deletions
include/mpeg_system.h
View file @ 910f40f9
......@@ -3,7 +3,7 @@
* and TS system layers
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
* $Id: mpeg_system.h,v 1.1 2001/02/08 04:43:27 sam Exp $
* $Id: mpeg_system.h,v 1.2 2001/02/21 04:38:59 henri Exp $
*
* Authors:
*
......@@ -28,6 +28,12 @@
#define TS_PACKET_SIZE 188 /* Size of a TS packet */
#define PSI_SECTION_SIZE 4096 /* Maximum size of a PSI section */
#define PAT_UNINITIALIZED (1 << 6)
#define PMT_UNINITIALIZED (1 << 6)
#define PSI_IS_PAT 0x00
#define PSI_IS_PMT 0x01
#define UNKNOWN_PSI 0xff
/*****************************************************************************
* psi_section_t
......@@ -39,11 +45,24 @@ typedef struct psi_section_s
{
byte_t buffer[PSI_SECTION_SIZE];
/* Is there a section being decoded ? */
boolean_t b_running_section;
u8 i_section_number;
u8 i_last_section_number;
u8 i_version_number;
u16 i_section_length;
u16 i_read_in_section;
/* the PSI is complete */
boolean_t b_is_complete;
/* packet missed up ? */
boolean_t b_trash;
/*about sections */
boolean_t b_section_complete;
/* where are we currently ? */
byte_t * p_current;
u16 i_length;
u16 i_current_position;
} psi_section_t;
/*****************************************************************************
......@@ -53,6 +72,9 @@ typedef struct es_ts_data_s
{
boolean_t b_psi; /* Does the stream have to be handled by
* the PSI decoder ? */
int i_psi_type; /* There are different types of PSI */
psi_section_t * p_psi_section; /* PSI packets */
/* Markers */
......@@ -65,6 +87,7 @@ typedef struct es_ts_data_s
typedef struct pgrm_ts_data_s
{
u16 i_pcr_pid; /* PCR ES, for TS streams */
int i_pmt_version;
} pgrm_ts_data_t;
/*****************************************************************************
......@@ -72,28 +95,7 @@ typedef struct pgrm_ts_data_s
*****************************************************************************/
typedef struct stream_ts_data_s
{
/* Program Association Table status */
u8 i_PAT_version; /* version number */
boolean_t b_is_PAT_complete; /* Is the PAT complete ? */
u8 i_known_PAT_sections;
/* Number of section we received so far */
byte_t a_known_PAT_sections[32];
/* Already received sections */
/* Program Map Table status */
boolean_t b_is_PMT_complete; /* Is the PMT complete ? */
u8 i_known_PMT_sections;
/* Number of section we received so far */
byte_t a_known_PMT_sections[32];
/* Already received sections */
/* Service Description Table status */
u8 i_SDT_version; /* version number */
boolean_t b_is_SDT_complete; /* Is the SDT complete ? */
u8 i_known_SDT_sections;
/* Number of section we received so far */
byte_t a_known_SDT_sections[32];
/* Already received sections */
int i_pat_version; /* Current version of the PAT */
} stream_ts_data_t;
/*****************************************************************************
......@@ -120,3 +122,5 @@ es_descriptor_t * input_ParsePS( struct input_thread_s *,
struct data_packet_s * );
void input_DemuxPS( struct input_thread_s *, struct data_packet_s * );
void input_DemuxTS( struct input_thread_s *, struct data_packet_s * );
void input_DemuxPSI( input_thread_t *, data_packet_t *, es_descriptor_t *,
boolean_t, boolean_t );
plugins/mpeg/input_ts.c
View file @ 910f40f9
......@@ -2,7 +2,7 @@
* input_ts.c: TS demux and netlist management
*****************************************************************************
* Copyright (C) 1998, 1999, 2000 VideoLAN
* $Id: input_ts.c,v 1.5 2001/02/20 07:49:13 sam Exp $
* $Id: input_ts.c,v 1.6 2001/02/21 04:38:59 henri Exp $
*
* Authors:
*
......@@ -130,8 +130,9 @@ static void TSInit( input_thread_t * p_input )
{
/* Initialize netlist and TS structures */
thread_ts_data_t * p_method;
pgrm_ts_data_t * p_pgrm_demux;
es_descriptor_t * kludge1;
es_descriptor_t * p_pat_es;
es_ts_data_t * p_demux_data;
stream_ts_data_t * p_stream_data;
/* Initialise structure */
p_method = malloc( sizeof( thread_ts_data_t ) );
......@@ -159,28 +160,21 @@ static void TSInit( input_thread_t * p_input )
/* Initialize the stream */
input_InitStream( p_input, sizeof( stream_ts_data_t ) );
/* FIXME : PSIDemux and PSIDecode */
/* Add audio and video programs */
/* p_input->stream.pp_programs[0] = */
input_AddProgram( p_input, 0, sizeof( pgrm_ts_data_t ) );
p_pgrm_demux =
(pgrm_ts_data_t *)p_input->stream.pp_programs[0]->p_demux_data;
p_pgrm_demux->i_pcr_pid = 0x78;
kludge1 = input_AddES( p_input, p_input->stream.pp_programs[0],
0x78, sizeof( es_ts_data_t ) );
// kludge
kludge1->i_type = MPEG2_VIDEO_ES;
input_SelectES( p_input, kludge1 );
vlc_mutex_lock( &(p_input->stream.stream_lock) );
p_input->stream.pp_programs[0]->b_is_ok = 1;
vlc_mutex_unlock( &(p_input->stream.stream_lock) );
//debug
intf_ErrMsg("End of TSINIT");
/* Init */
p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
p_stream_data->i_pat_version = PAT_UNINITIALIZED ;
/* We'll have to catch the PAT in order to continue
* Then the input will catch the PMT and then the others ES
* The PAT es is indepedent of any program. */
p_pat_es = input_AddES( p_input, NULL,
0x00, sizeof( es_ts_data_t ) );
p_demux_data=(es_ts_data_t *)p_pat_es->p_demux_data;
p_demux_data->b_psi = 1;
p_demux_data->i_psi_type = PSI_IS_PAT;
p_demux_data->p_psi_section = malloc(sizeof(psi_section_t));
p_demux_data->p_psi_section->b_is_complete = 1;
}
/*****************************************************************************
......@@ -188,7 +182,13 @@ intf_ErrMsg("End of TSINIT");
*****************************************************************************/
static void TSEnd( input_thread_t * p_input )
{
es_descriptor_t * p_pat_es;
p_pat_es = input_FindES( p_input, 0x00 );
if( p_pat_es != NULL )
input_DelES( p_input, p_pat_es );
free(p_input->p_plugin_data);
}
/*****************************************************************************
......
plugins/mpeg/input_ts.h
View file @ 910f40f9
......@@ -2,7 +2,7 @@
* input.h: structures of the input not exported to other modules
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
* $Id: input_ts.h,v 1.1 2001/02/14 15:58:29 henri Exp $
* $Id: input_ts.h,v 1.2 2001/02/21 04:38:59 henri Exp $
*
* Authors:
*
......@@ -22,12 +22,10 @@
*****************************************************************************/
// #define NB_DATA 16384
// #define NB_PES 8192
#define NB_DATA 17000
#define NB_PES 9000
#define NB_DATA 16384
#define NB_PES 8192
/* Will be used whne NetworkOpen is ready */
typedef struct thread_ts_data_s {
// FILE * stream;
......
src/input/mpeg_system.c
View file @ 910f40f9
......@@ -2,12 +2,13 @@
* mpeg_system.c: TS, PS and PES management
*****************************************************************************
* Copyright (C) 1998, 1999, 2000 VideoLAN
* $Id: mpeg_system.c,v 1.37 2001/02/19 19:08:59 massiot Exp $
* $Id: mpeg_system.c,v 1.38 2001/02/21 04:38:59 henri Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Michel Lespinasse <walken@via.ecp.fr>
* Benot Steiner <benny@via.ecp.fr>
* Samuel Hocevar <sam@via.ecp.fr>
* Henri Fallon <henri@via.ecp.fr>
*
* 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
......@@ -51,6 +52,8 @@
* Local prototypes
*****************************************************************************/
static void input_DecodePAT( input_thread_t *, es_descriptor_t *);
static void input_DecodePMT( input_thread_t *, es_descriptor_t *);
/*
* PES Packet management
......@@ -887,21 +890,20 @@ void input_DemuxPS( input_thread_t * p_input, data_packet_t * p_data )
*****************************************************************************/
void input_DemuxTS( input_thread_t * p_input, data_packet_t * p_data )
{
int i_pid, i_dummy;
u16 i_pid;
int i_dummy;
boolean_t b_adaptation; /* Adaptation field is present */
boolean_t b_payload; /* Packet carries payload */
boolean_t b_unit_start; /* A PSI or a PES start in the packet */
boolean_t b_trash = 0; /* Is the packet unuseful ? */
boolean_t b_lost = 0; /* Was there a packet loss ? */
boolean_t b_psi = 0; /* Is this a PSI ? */
es_descriptor_t * p_es = NULL;
es_ts_data_t * p_es_demux = NULL;
pgrm_ts_data_t * p_pgrm_demux = NULL;
#define p (p_data->p_buffer)
//intf_DbgMsg("input debug: TS-demultiplexing packet %p, pid %d",
// p_ts_packet, U16_AT(&p[1]) & 0x1fff);
/* Extract flags values from TS common header. */
i_pid = U16_AT(&p[1]) & 0x1fff;
b_unit_start = (p[1] & 0x40);
......@@ -911,42 +913,42 @@ void input_DemuxTS( input_thread_t * p_input, data_packet_t * p_data )
/* Find out the elementary stream. */
vlc_mutex_lock( &p_input->stream.stream_lock );
// kludge
if ( i_pid == 0x78 )
{
p_es = input_FindES( p_input, 0x78 );
p_es->i_type = MPEG2_VIDEO_ES;
if( p_es->p_pes == NULL )
intf_ErrMsg("Got p_es . p_es->p_pes == null ? %d",p_es->p_pes == NULL);
}
else
{
p_es = NULL;
b_trash = 1;
}
p_es= input_FindES( p_input, i_pid );
if( (p_es != NULL) && (p_es->p_demux_data != NULL) )
{
p_es_demux = (es_ts_data_t *)p_es->p_demux_data;
if( p_es_demux->b_psi )
b_psi = 1;
}
vlc_mutex_lock( &p_input->stream.control.control_lock );
if( p_es == NULL || p_es->p_decoder_fifo == NULL
|| (p_es->b_audio && p_input->stream.control.b_mute) )
if( ( p_es == NULL ) || (p_es->b_audio && p_input->stream.control.b_mute) )
{
/* Not selected. Just read the adaptation field for a PCR. */
b_trash = 1;
}
else if( p_es->p_decoder_fifo == NULL && !b_psi )
b_trash =1;
vlc_mutex_unlock( &p_input->stream.control.control_lock );
vlc_mutex_unlock( &p_input->stream.stream_lock );
// kludge
if (p_es != NULL )
{
p_es_demux = (es_ts_data_t *)p_es->p_demux_data;
p_pgrm_demux = (pgrm_ts_data_t *)p_es->p_pgrm->p_demux_data;
p_pgrm_demux->i_pcr_pid = 0x78;
if( (p_es->p_decoder_fifo != NULL) || (p_pgrm_demux->i_pcr_pid == i_pid) )
if( ( p_es != NULL ) &&
((p_es->p_decoder_fifo != NULL) || b_psi
|| (p_pgrm_demux->i_pcr_pid == i_pid) ) )
{
p_es_demux = (es_ts_data_t *)p_es->p_demux_data;
if( ! p_es_demux->b_psi )
{
p_pgrm_demux = (pgrm_ts_data_t *)p_es->p_pgrm->p_demux_data;
}
#ifdef STATS
p_es->c_packets++;
#endif
......@@ -1082,13 +1084,10 @@ else
} /* not continuous */
} /* continuity */
} /* if selected or PCR */
}
/* Trash the packet if it has no payload or if it isn't selected */
if( b_trash )
{
p_input->pf_delete_packet( p_input->p_method_data, p_data );
#ifdef STATS
p_input->c_packets_trashed++;
......@@ -1096,24 +1095,324 @@ else
}
else
{
if( p_es_demux->b_psi )
if( b_psi )
{
//debug
//printf("DemuxTS : Was a PSI\n");
/* The payload contains PSI tables */
#if 0
/* FIXME ! write the PSI decoder :p */
input_DemuxPSI( p_input, p_data, p_es,
b_unit_start, b_lost );
#endif
}
else
{
/* The payload carries a PES stream */
input_GatherPES( p_input, p_data, p_es, b_unit_start, b_lost );
}
}
#undef p
}
/*
* PSI demultiplexing and decoding
*/
/*****************************************************************************
* DemuxPSI : makes up complete PSI data
*****************************************************************************/
void input_DemuxPSI( input_thread_t * p_input, data_packet_t * p_data,
es_descriptor_t * p_es, boolean_t b_unit_start, boolean_t b_lost )
{
es_ts_data_t * p_demux_data;
p_demux_data = (es_ts_data_t *)p_es->p_demux_data;
#define p_psi (p_demux_data->p_psi_section)
#define p (p_data->p_payload_start)
if( b_unit_start )
{
/* unit_start set to 1 -> presence of a pointer field
* (see ISO/IEC 13818 (2.4.4.2) which should be set to 0x00 */
if( (u8)p[0] != 0x00 )
{
/* intf_WarnMsg( 2, */
intf_ErrMsg( "Non zero pointer field found. Trying to continue" );
p+=(u8)p[0];
}
else
p++;
/* This is the begining of a new section */
if( ((u8)(p[1]) & 0xc0) != 0x80 )
{
intf_ErrMsg( "Invalid PSI packet" );
p_psi->b_trash = 1;
}
else
{
p_psi->i_section_length = U16_AT(p+1) & 0x0fff;
p_psi->b_section_complete = 0;
p_psi->i_read_in_section = 0;
p_psi->i_section_number = (u8)p[6];
if( p_psi->b_is_complete || p_psi->i_section_number == 0 )
{
/* This is a new PSI packet */
p_psi->b_is_complete = 0;
p_psi->b_trash = 0;
p_psi->i_version_number = ( p[5] >> 1 ) & 0x1f;
p_psi->i_last_section_number = (u8)p[7];
/* We'll write at the begining of the buffer */
p_psi->p_current = p_psi->buffer;
}
else
{
if( p_psi->b_section_complete )
{
/* New Section of an already started PSI */
p_psi->b_section_complete = 0;
if( p_psi->i_version_number != (( p[5] >> 1 ) & 0x1f) )
{
intf_WarnMsg( 2,"PSI version differs inside same PAT" );
p_psi->b_trash = 1;
}
if( p_psi->i_section_number + 1 != (u8)p[6] )
{
intf_WarnMsg( 2,
"PSI Section discontinuity. Packet lost ?");
p_psi->b_trash = 1;
}
else
p_psi->i_section_number++;
}
else
{
intf_WarnMsg( 2, "Received unexpected new PSI section" );
p_psi->b_trash = 1;
}
}
}
} /* b_unit_start */
if( !p_psi->b_trash )
{
/* read */
if( (p_data->p_payload_end - p) >=
( p_psi->i_section_length - p_psi->i_read_in_section ) )
{
/* The end of the section is in this TS packet */
memcpy( p_psi->p_current, p,
(p_psi->i_section_length - p_psi->i_read_in_section) );
p_psi->b_section_complete = 1;
p_psi->p_current +=
(p_psi->i_section_length - p_psi->i_read_in_section);
if( p_psi->i_section_number == p_psi->i_last_section_number )
{
/* This was the last section of PSI */
p_psi->b_is_complete = 1;
}
}
else
{
memcpy( p_psi->buffer, p, p_data->p_payload_end - p );
p_psi->i_read_in_section+= p_data->p_payload_end - p;
p_psi->p_current += p_data->p_payload_end - p;
}
}
if ( p_psi->b_is_complete )
{
switch( p_demux_data->i_psi_type)
{
case PSI_IS_PAT:
input_DecodePAT( p_input, p_es );
break;
case PSI_IS_PMT:
input_DecodePMT( p_input, p_es );
break;
default:
intf_ErrMsg("Received unknown PSI in demuxPSI");
}
}
#undef p_psi
#undef p
return ;
}
/*****************************************************************************
* DecodePAT : Decodes Programm association table and deal with it
*****************************************************************************/
static void input_DecodePAT( input_thread_t * p_input, es_descriptor_t * p_es )
{
stream_ts_data_t * p_stream_data;
es_ts_data_t * p_demux_data;
p_demux_data = (es_ts_data_t *)p_es->p_demux_data;
p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
#define p_psi (p_demux_data->p_psi_section)
if( p_stream_data->i_pat_version != p_psi->i_version_number )
{
/* PAT has changed. We are going to delete all programms and
* create new ones. We chose not to only change what was needed
* as a PAT change may mean the stream is radically changing and
* this is a secure method to avoid krashed */
pgrm_descriptor_t * p_pgrm;
es_descriptor_t * p_current_es;
es_ts_data_t * p_es_demux;
pgrm_ts_data_t * p_pgrm_demux;
byte_t * p_current_data;
int i_section_length,i_program_id,i_pmt_pid;
int i_loop, i_current_section;
p_current_data = p_psi->buffer;
for( i_loop = 0; i_loop < p_input->stream.i_pgrm_number; i_loop++ )
{
input_DelProgram( p_input, p_input->stream.pp_programs[i_loop] );
}
do
{
i_section_length = U16_AT(p_current_data+1) & 0x0fff;
i_current_section = (u8)p_current_data[6];
for( i_loop = 0; i_loop < (i_section_length-9)/4 ; i_loop++ )
{
i_program_id = U16_AT(p_current_data + i_loop*4 + 8);
i_pmt_pid = U16_AT( p_current_data + i_loop*4 + 10) & 0x1fff;
/* If program = 0, we're having info about NIT not PMT */
if( i_program_id )
{
/* Add this program */
p_pgrm = input_AddProgram( p_input, i_program_id,
sizeof( pgrm_ts_data_t ) );
/* whatis the PID of the PMT of this program */
p_pgrm_demux = (pgrm_ts_data_t *)p_pgrm->p_demux_data;
p_pgrm_demux->i_pmt_version = PMT_UNINITIALIZED;
/* Add the PMT ES to this program */
p_current_es = input_AddES( p_input, p_pgrm,(u16)i_pmt_pid,
sizeof( es_ts_data_t) );
p_es_demux = (es_ts_data_t *)p_current_es->p_demux_data;
p_es_demux->b_psi = 1;
p_es_demux->i_psi_type = PSI_IS_PMT;
p_es_demux->p_psi_section =
malloc( sizeof( psi_section_t ) );
p_es_demux->p_psi_section->b_is_complete = 0;
}
}
p_current_data+=3+i_section_length;
} while( i_current_section < p_psi->i_last_section_number );
/* Go to the beginning of the next section*/
p_stream_data->i_pat_version = p_psi->i_version_number;
}
#undef p_psi
}
/*****************************************************************************
* DecodePMT : decode a given Program Stream Map
* ***************************************************************************
* When the PMT changes, it may mean a deep change in the stream, and it is
* careful to deletes the ES and add them again. If the PMT doesn't change,
* there no need to do anything.
*****************************************************************************/
static void input_DecodePMT( input_thread_t * p_input, es_descriptor_t * p_es )
{
pgrm_ts_data_t * p_pgrm_data;
es_ts_data_t * p_demux_data;
p_demux_data = (es_ts_data_t *)p_es->p_demux_data;
p_pgrm_data = (pgrm_ts_data_t *)p_es->p_pgrm->p_demux_data;
#define p_psi (p_demux_data->p_psi_section)
if( p_psi->i_version_number != p_pgrm_data->i_pmt_version )
{
es_descriptor_t * p_new_es;
es_ts_data_t * p_es_demux;
byte_t * p_current_data, * p_current_section;
int i_section_length,i_current_section;
int i_prog_info_length, i_loop;
int i_es_info_length, i_pid, i_stream_type;
p_current_section = p_psi->buffer;
p_current_data = p_psi->buffer;
p_pgrm_data->i_pcr_pid = U16_AT(p_current_section + 8) & 0x1fff;
/* Delete all ES in this program except the PSI */
for( i_loop=0; i_loop < p_es->p_pgrm->i_es_number; i_loop++ )
{
p_es_demux = (es_ts_data_t *)
p_es->p_pgrm->pp_es[i_loop]->p_demux_data;
if ( ! p_es_demux->b_psi )
input_DelES( p_input, p_es->p_pgrm->pp_es[i_loop] );
}
/* Then add what we received in this PMT */
do
{
i_section_length = U16_AT(p_current_data+1) & 0x0fff;
i_current_section = (u8)p_current_data[6];
i_prog_info_length = U16_AT(p_current_data+10) & 0x0fff;
/* For the moment we ignore program descriptors */
p_current_data += 12+i_prog_info_length;
/* The end of the section, before the CRC is at
* p_current_section + i_section_length -1 */
while( p_current_data < p_current_section + i_section_length -1 )
{
i_stream_type = (int)p_current_data[0];
i_pid = U16_AT( p_current_data + 1 ) & 0x1fff;
i_es_info_length = U16_AT( p_current_data + 3 ) & 0x0fff;
/* Add this ES to the program */
p_new_es = input_AddES( p_input, p_es->p_pgrm,
(u16)i_pid, sizeof( es_ts_data_t ) );
p_new_es->i_type = i_stream_type;
/* We want to decode */
input_SelectES( p_input, p_new_es );
p_current_data += 5 + i_es_info_length;
}
/* Go to the beginning of the next section*/
p_current_data += 3+i_section_length;
p_current_section+=1;
} while( i_current_section < p_psi->i_last_section_number );
p_pgrm_data->i_pmt_version = p_psi->i_version_number;
}
#undef p_psi
}
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