* mpeg_system.c: TS, PS and PES management
*****************************************************************************
* Copyright (C) 1998, 1999, 2000 VideoLAN
- * $Id: mpeg_system.c,v 1.25 2001/01/08 18:16:33 sam Exp $
+ * $Id: mpeg_system.c,v 1.45 2001/03/15 01:42:20 sam Exp $
*
- * Authors:
+ * Authors: Christophe Massiot <massiot@via.ecp.fr>
+ * Michel Lespinasse <walken@via.ecp.fr>
+ * Benoît 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
#include "input.h"
#include "mpeg_system.h"
-#include "input_dec.h"
#include "main.h" /* AC3/MPEG channel, SPU channel */
* 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
*****************************************************************************
* Small utility function used to parse discontinuous headers safely. Copies
* i_buf_len bytes of data to a buffer and returns the size copied.
+ * It also solves some alignment problems on non-IA-32, non-PPC processors.
* This is a variation on the theme of input_ext-dec.h:GetChunk().
*****************************************************************************/
static __inline__ size_t MoveChunk( byte_t * p_dest,
!= PES_HEADER_SIZE )
{
intf_WarnMsg( 3, "PES packet too short to have a header" );
- p_input->p_plugin->pf_delete_pes( p_input->p_method_data, p_pes );
+ p_input->pf_delete_pes( p_input->p_method_data, p_pes );
p_pes = NULL;
return;
}
{
/* packet_start_code_prefix != 0x000001 */
intf_ErrMsg( "PES packet doesn't start with 0x000001 : data loss" );
- p_input->p_plugin->pf_delete_pes( p_input->p_method_data, p_pes );
+ p_input->pf_delete_pes( p_input->p_method_data, p_pes );
p_pes = NULL;
}
else
/* PES_packet_length is set and != total received payload */
/* Warn the decoder that the data may be corrupt. */
intf_WarnMsg( 3, "PES sizes do not match : packet corrupted" );
- p_pes->b_messed_up = 1;
}
switch( p_es->i_stream_id )
{
intf_WarnMsg( 3,
"PES packet too short to have a MPEG-2 header" );
- p_input->p_plugin->pf_delete_pes( p_input->p_method_data,
- p_pes );
+ p_input->pf_delete_pes( p_input->p_method_data,
+ p_pes );
p_pes = NULL;
return;
}
{
intf_WarnMsg( 3,
"PES packet too short to have a MPEG-2 header" );
- p_input->p_plugin->pf_delete_pes(
- p_input->p_method_data,
- p_pes );
+ p_input->pf_delete_pes( p_input->p_method_data,
+ p_pes );
p_pes = NULL;
return;
}
- p_pes->i_pts =
+ p_pes->i_pts = input_ClockGetTS( p_input, p_es->p_pgrm,
( ((mtime_t)(p_full_header[2] & 0x0E) << 29) |
- (((mtime_t)U16_AT(p_full_header + 3) << 14) - (1 << 14)) |
- ((mtime_t)U16_AT(p_full_header + 5) >> 1) ) * 300;
- p_pes->i_pts /= 27;
+ ((mtime_t)(p_full_header[3]) << 22) |
+ ((mtime_t)(p_full_header[4] & 0xFE) << 14) |
+ ((mtime_t)p_full_header[5] << 7) |
+ ((mtime_t)p_full_header[6] >> 1) ) );
if( b_has_dts )
{
{
intf_WarnMsg( 3,
"PES packet too short to have a MPEG-2 header" );
- p_input->p_plugin->pf_delete_pes(
- p_input->p_method_data,
- p_pes );
+ p_input->pf_delete_pes( p_input->p_method_data,
+ p_pes );
p_pes = NULL;
return;
}
- p_pes->i_dts =
+ p_pes->i_dts = input_ClockGetTS( p_input, p_es->p_pgrm,
( ((mtime_t)(p_full_header[7] & 0x0E) << 29) |
(((mtime_t)U16_AT(p_full_header + 8) << 14)
- (1 << 14)) |
- ((mtime_t)U16_AT(p_full_header + 10) >> 1) ) * 300;
- p_pes->i_dts /= 27;
+ ((mtime_t)U16_AT(p_full_header + 10) >> 1) ) );
}
}
}
/* Cannot fail because the previous one succeeded. */
MoveChunk( NULL, &p_data, &p_byte, 6 );
- while( *p_byte == 0xFF && i_pes_header_size < 22 )
+ while( *p_byte == 0xFF && i_pes_header_size < 23 )
{
i_pes_header_size++;
if( MoveChunk( NULL, &p_data, &p_byte, 1 ) != 1 )
{
intf_WarnMsg( 3,
"PES packet too short to have a MPEG-1 header" );
- p_input->p_plugin->pf_delete_pes( p_input->p_method_data, p_pes );
+ p_input->pf_delete_pes( p_input->p_method_data, p_pes );
p_pes = NULL;
return;
}
}
- if( i_pes_header_size == 22 )
+ if( i_pes_header_size == 23 )
{
intf_ErrMsg( "Too much MPEG-1 stuffing" );
- p_input->p_plugin->pf_delete_pes( p_input->p_method_data, p_pes );
+ p_input->pf_delete_pes( p_input->p_method_data, p_pes );
p_pes = NULL;
return;
}
{
intf_WarnMsg( 3,
"PES packet too short to have a MPEG-1 header" );
- p_input->p_plugin->pf_delete_pes( p_input->p_method_data, p_pes );
+ p_input->pf_delete_pes( p_input->p_method_data, p_pes );
p_pes = NULL;
return;
}
{
intf_WarnMsg( 3,
"PES packet too short to have a MPEG-1 header" );
- p_input->p_plugin->pf_delete_pes(
- p_input->p_method_data, p_pes );
+ p_input->pf_delete_pes( p_input->p_method_data, p_pes );
p_pes = NULL;
return;
}
- p_pes->i_pts =
- ( ((mtime_t)(p_ts[0] & 0x0E) << 29) |
- (((mtime_t)U16_AT(p_ts + 1) << 14) - (1 << 14)) |
- ((mtime_t)U16_AT(p_ts + 3) >> 1) ) * 300;
- p_pes->i_pts /= 27;
+ p_pes->i_pts = input_ClockGetTS( p_input, p_es->p_pgrm,
+ ( ((mtime_t)(p_ts[0] & 0x0E) << 29) |
+ (((mtime_t)U32_AT(p_ts) & 0xFFFE00) << 6) |
+ ((mtime_t)p_ts[3] << 7) |
+ ((mtime_t)p_ts[4] >> 1) ) );
if( b_has_dts )
{
{
intf_WarnMsg( 3,
"PES packet too short to have a MPEG-1 header" );
- p_input->p_plugin->pf_delete_pes(
- p_input->p_method_data, p_pes );
+ p_input->pf_delete_pes( p_input->p_method_data,
+ p_pes );
p_pes = NULL;
return;
}
- p_pes->i_dts =
+ p_pes->i_dts = input_ClockGetTS( p_input,
+ p_es->p_pgrm,
( ((mtime_t)(p_ts[0] & 0x0E) << 29) |
- (((mtime_t)U16_AT(p_ts + 1) << 14) - (1 << 14)) |
- ((mtime_t)U16_AT(p_ts + 3) >> 1) ) * 300;
- p_pes->i_dts /= 27;
+ (((mtime_t)U32_AT(p_ts) & 0xFFFE00) << 6) |
+ ((mtime_t)p_ts[3] << 7) |
+ ((mtime_t)p_ts[4] >> 1) ) );
}
}
}
- /* PTS management */
- if( p_pes->i_pts )
- {
- //intf_Msg("%lld", p_pes->i_pts);
- switch( p_es->p_pgrm->i_synchro_state )
- {
- case SYNCHRO_NOT_STARTED:
- case SYNCHRO_START:
- p_pes->i_pts = p_pes->i_dts = 0;
- break;
-
- case SYNCHRO_REINIT: /* We skip a PES | Why ?? --Meuuh */
- p_pes->i_pts = p_pes->i_dts = 0;
- p_es->p_pgrm->i_synchro_state = SYNCHRO_START;
- break;
-
- case SYNCHRO_OK:
- p_pes->i_pts += p_es->p_pgrm->delta_cr
- + p_es->p_pgrm->delta_absolute
- + DEFAULT_PTS_DELAY;
- if( p_pes->i_dts )
- {
- p_pes->i_dts += p_es->p_pgrm->delta_cr
- + p_es->p_pgrm->delta_absolute
- + DEFAULT_PTS_DELAY;
- }
- break;
- }
- }
break;
}
if( (p_data = p_data->p_next) == NULL )
{
intf_ErrMsg( "PES header bigger than payload" );
- p_input->p_plugin->pf_delete_pes( p_input->p_method_data,
- p_pes );
+ p_input->pf_delete_pes( p_input->p_method_data, p_pes );
p_pes = NULL;
return;
}
if( i_payload_size < i_pes_header_size )
{
intf_ErrMsg( "PES header bigger than payload" );
- p_input->p_plugin->pf_delete_pes( p_input->p_method_data, p_pes );
+ p_input->pf_delete_pes( p_input->p_method_data, p_pes );
p_pes = NULL;
return;
}
{
intf_ErrMsg("No fifo to receive PES %p (who wrote this damn code ?)",
p_pes);
- p_input->p_plugin->pf_delete_pes( p_input->p_method_data, p_pes );
+ p_input->pf_delete_pes( p_input->p_method_data, p_pes );
}
p_pes = NULL;
}
#undef p_pes
+
}
/*****************************************************************************
/* If we lost data, insert a NULL data packet (philosophy : 0 is quite
* often an escape sequence in decoders, so that should make them wait
* for the next start code). */
- if( b_packet_lost || p_es->b_discontinuity )
+ if( b_packet_lost )
{
- data_packet_t * p_pad_data;
-
- if( (p_pad_data = p_input->p_plugin->pf_new_packet(
- p_input->p_method_data,
- PADDING_PACKET_SIZE )) == NULL )
- {
- intf_ErrMsg("Out of memory");
- p_input->b_error = 1;
- return;
- }
- memset( p_data->p_buffer, 0, PADDING_PACKET_SIZE );
- p_pad_data->b_discard_payload = 1;
-
- if( p_pes != NULL )
- {
- p_pes->b_messed_up = p_pes->b_discontinuity = 1;
- input_GatherPES( p_input, p_pad_data, p_es, 0, 0 );
- }
- else
- {
- if( (p_pes = p_input->p_plugin->pf_new_pes(
- p_input->p_method_data )) == NULL )
- {
- intf_ErrMsg("Out of memory");
- p_input->b_error = 1;
- return;
- }
-
- p_pes->p_first = p_pad_data;
- p_pes->b_messed_up = p_pes->b_discontinuity = 1;
- input_DecodePES( p_es->p_decoder_fifo, p_pes );
- }
-
- p_es->b_discontinuity = 0;
+ input_NullPacket( p_input, p_es );
}
if( b_unit_start && p_pes != NULL )
{
- /* If the TS packet contains the begining of a new PES packet, and
+ /* If the data packet contains the begining of a new PES packet, and
* if we were reassembling a PES packet, then the PES should be
* complete now, so parse its header and give it to the decoders. */
input_ParsePES( p_input, p_es );
if( !b_unit_start && p_pes == NULL )
{
/* Random access... */
- p_input->p_plugin->pf_delete_packet( p_input->p_method_data, p_data );
+ p_input->pf_delete_packet( p_input->p_method_data, p_data );
}
else
{
* packet. This is also here that we can synchronize with the
* stream if we lost packets or if the decoder has just
* started. */
- if( (p_pes = p_input->p_plugin->pf_new_pes( p_input->p_method_data ) ) == NULL )
+ if( (p_pes = p_input->pf_new_pes( p_input->p_method_data ) ) == NULL )
{
intf_ErrMsg("Out of memory");
p_input->b_error = 1;
return;
}
- //intf_DbgMsg("New PES packet %p (first data: %p)", p_pes, p_data);
+ p_pes->i_rate = p_input->stream.control.i_rate;
p_pes->p_first = p_data;
-
+
/* If the PES header fits in the first data packet, we can
* already set p_gather->i_pes_real_size. */
if( p_data->p_payload_end - p_data->p_payload_start
{
p_es->i_pes_real_size =
U16_AT(p_data->p_payload_start + 4) + 6;
+
}
else
- {
+ {
p_es->i_pes_real_size = 0;
- }
+ }
}
else
{
p_es->p_last->p_next = p_data;
}
- p_data->p_next = NULL;
p_es->p_last = p_data;
/* Size of the payload carried in the data packet */
}
-/*
- * Pace control
- */
-
-/*
- * DISCUSSION : SYNCHRONIZATION METHOD
- *
- * In some cases we can impose the pace of reading (when reading from a
- * file or a pipe), and for the synchronization we simply sleep() until
- * it is time to deliver the packet to the decoders. When reading from
- * the network, we must be read at the same pace as the server writes,
- * otherwise the kernel's buffer will trash packets. The risk is now to
- * overflow the input buffers in case the server goes too fast, that is
- * why we do these calculations :
- *
- * We compute an average for the pcr because we want to eliminate the
- * network jitter and keep the low frequency variations. The average is
- * in fact a low pass filter and the jitter is a high frequency signal
- * that is why it is eliminated by the filter/average.
- *
- * The low frequency variations enable us to synchronize the client clock
- * with the server clock because they represent the time variation between
- * the 2 clocks. Those variations (ie the filtered pcr) are used to compute
- * the presentation dates for the audio and video frames. With those dates
- * we can decode (or trash) the MPEG2 stream at "exactly" the same rate
- * as it is sent by the server and so we keep the synchronization between
- * the server and the client.
- *
- * It is a very important matter if you want to avoid underflow or overflow
- * in all the FIFOs, but it may be not enough.
- */
-
-/*****************************************************************************
- * Constants
- *****************************************************************************/
-
-/* Maximum number of samples used to compute the dynamic average value,
- * it is also the maximum of c_average_count in pgrm_ts_data_t.
- * We use the following formula :
- * new_average = (old_average * c_average + new_sample_value) / (c_average +1) */
-#define CR_MAX_AVERAGE_COUNTER 40
-
-/* Maximum gap allowed between two CRs. */
-#define CR_MAX_GAP 1000000
-
-/*****************************************************************************
- * CRReInit : Reinitialize the clock reference
- *****************************************************************************/
-static void CRReInit( pgrm_descriptor_t * p_pgrm )
-{
- p_pgrm->delta_cr = 0;
- p_pgrm->last_cr = 0;
- p_pgrm->c_average_count = 0;
-}
-
-/* FIXME: find a better name */
-/*****************************************************************************
- * CRDecode : Decode a clock reference
- *****************************************************************************/
-static void CRDecode( input_thread_t * p_input, pgrm_descriptor_t * p_pgrm,
- mtime_t cr_time )
-{
- if( p_pgrm->i_synchro_state != SYNCHRO_OK )
- {
- switch( p_pgrm->i_synchro_state )
- {
- case SYNCHRO_START:
- p_pgrm->delta_absolute = mdate() - cr_time;
- p_pgrm->i_synchro_state = SYNCHRO_OK;
- break;
-
- case SYNCHRO_NOT_STARTED:
- p_pgrm->i_synchro_state = SYNCHRO_START;
- break;
-
- default:
- break;
- }
- }
- else
- {
- if( p_pgrm->b_discontinuity ||
- ( p_pgrm->last_cr != 0 &&
- ( (p_pgrm->last_cr - cr_time) > CR_MAX_GAP
- || (p_pgrm->last_cr - cr_time) < - CR_MAX_GAP ) ) )
- {
- int i_es;
-
- /* Stream discontinuity. */
- intf_WarnMsg( 3, "CR re-initialiazed" );
- CRReInit( p_pgrm );
- p_pgrm->i_synchro_state = SYNCHRO_REINIT;
- p_pgrm->b_discontinuity = 0;
-
- /* Warn all the elementary streams */
- for( i_es = 0; i_es < p_pgrm->i_es_number; i_es++ )
- {
- p_pgrm->pp_es[i_es]->b_discontinuity = 1;
- }
- }
- p_pgrm->last_cr = cr_time;
-
- if( p_input->stream.b_pace_control )
- {
- /* Wait a while before delivering the packets to the decoder. */
- mwait( cr_time + p_pgrm->delta_absolute );
- }
- else
- {
- mtime_t sys_time, delta_cr;
-
- sys_time = mdate();
- delta_cr = sys_time - cr_time;
-
- if( p_pgrm->c_average_count == CR_MAX_AVERAGE_COUNTER )
- {
- p_pgrm->delta_cr = ( delta_cr + (p_pgrm->delta_cr
- * (CR_MAX_AVERAGE_COUNTER - 1)) )
- / CR_MAX_AVERAGE_COUNTER;
- }
- else
- {
- p_pgrm->delta_cr = ( delta_cr + (p_pgrm->delta_cr
- * p_pgrm->c_average_count) )
- / ( p_pgrm->c_average_count + 1 );
- p_pgrm->c_average_count++;
- }
- }
- }
-}
-
-
/*
* PS Demultiplexing
*/
{
u16 i_id;
- i_id = p_data->p_buffer[3]; /* stream_id */
+ i_id = p_data->p_payload_start[3]; /* stream_id */
if( i_id == 0xBD )
{
+ /* FIXME : this is not valid if the header is split in multiple
+ * packets */
/* stream_private_id */
- i_id |= p_data->p_buffer[ 9 + p_data->p_buffer[8] ] << 8;
+ i_id |= p_data->p_payload_start[ 9 + p_data->p_payload_start[8] ] << 8;
}
return( i_id );
}
/*****************************************************************************
* DecodePSM: Decode the Program Stream Map information
+ *****************************************************************************
+ * FIXME : loads are not aligned in this function
*****************************************************************************/
static void DecodePSM( input_thread_t * p_input, data_packet_t * p_data )
{
int i;
int i_new_es_number = 0;
- intf_Msg("input info: Your stream contains Program Stream Map information");
- intf_Msg("input info: Please send a mail to <massiot@via.ecp.fr>");
-
if( p_data->p_payload_start + 10 > p_data->p_payload_end )
{
intf_ErrMsg( "PSM too short : packet corrupt" );
}
if( p_demux->b_has_PSM
- && p_demux->i_PSM_version == (p_data->p_buffer[6] & 0x1F) )
+ && p_demux->i_PSM_version == (p_data->p_payload_start[6] & 0x1F) )
{
/* Already got that one. */
return;
intf_DbgMsg( "Building PSM" );
p_demux->b_has_PSM = 1;
- p_demux->i_PSM_version = p_data->p_buffer[6] & 0x1F;
+ p_demux->i_PSM_version = p_data->p_payload_start[6] & 0x1F;
/* Go to elementary_stream_map_length, jumping over
* program_stream_info. */
p_es = input_AddES( p_input, p_input->stream.pp_programs[0],
i_stream_id, 0 );
p_es->i_type = p_byte[0];
+ p_es->b_audio = ( p_es->i_type == MPEG1_AUDIO_ES
+ || p_es->i_type == MPEG2_AUDIO_ES
+ || p_es->i_type == AC3_AUDIO_ES
+ || p_es->i_type == LPCM_AUDIO_ES
+ );
/* input_AddES has inserted the new element at the end. */
p_input->stream.pp_programs[0]->pp_es[
u32 i_code;
es_descriptor_t * p_es = NULL;
- i_code = U32_AT( p_data->p_buffer );
- if( i_code > 0x1BC ) /* ES start code */
+ i_code = p_data->p_payload_start[3];
+ if( i_code > 0xBC ) /* ES start code */
{
u16 i_id;
int i_dummy;
i_id, 0 );
if( p_es != NULL )
{
- p_es->i_stream_id = p_data->p_buffer[3];
+ p_es->i_stream_id = p_data->p_payload_start[3];
/* Set stream type and auto-spawn. */
if( (i_id & 0xF0) == 0xE0 )
{
/* MPEG audio */
p_es->i_type = MPEG2_AUDIO_ES;
+ p_es->b_audio = 1;
#ifdef AUTO_SPAWN
- if( main_GetIntVariable( INPUT_DVD_AUDIO_VAR, 0 )
- == REQUESTED_MPEG
- && main_GetIntVariable( INPUT_DVD_CHANNEL_VAR, 0 )
+ if( !p_input->stream.b_seekable )
+ if( main_GetIntVariable( INPUT_CHANNEL_VAR, 0 )
== (p_es->i_id & 0x1F) )
+ switch( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) )
{
- if( !p_input->stream.b_seekable )
- input_SelectES( p_input, p_es );
+ case 0:
+ main_PutIntVariable( INPUT_CHANNEL_VAR,
+ REQUESTED_MPEG );
+ case REQUESTED_MPEG:
+ input_SelectES( p_input, p_es );
}
#endif
}
{
/* AC3 audio (0x80->0x8F) */
p_es->i_type = AC3_AUDIO_ES;
+ p_es->b_audio = 1;
#ifdef AUTO_SPAWN
- if( main_GetIntVariable( INPUT_DVD_AUDIO_VAR, 0 )
- == REQUESTED_AC3
- && main_GetIntVariable( INPUT_DVD_CHANNEL_VAR, 0 )
+ if( !p_input->stream.b_seekable )
+ if( main_GetIntVariable( INPUT_CHANNEL_VAR, 0 )
== ((p_es->i_id & 0xF00) >> 8) )
+ switch( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) )
{
- if( !p_input->stream.b_seekable )
- input_SelectES( p_input, p_es );
+ case 0:
+ main_PutIntVariable( INPUT_CHANNEL_VAR,
+ REQUESTED_AC3 );
+ case REQUESTED_AC3:
+ input_SelectES( p_input, p_es );
}
#endif
}
{
/* Subtitles video (0x20->0x3F) */
p_es->i_type = DVD_SPU_ES;
+ p_es->b_spu = 1;
#ifdef AUTO_SPAWN
- if( main_GetIntVariable( INPUT_DVD_SUBTITLE_VAR, -1 )
+ if( main_GetIntVariable( INPUT_SUBTITLE_VAR, -1 )
== ((p_es->i_id & 0x1F00) >> 8) )
{
if( !p_input->stream.b_seekable )
{
/* LPCM audio (0xA0->0xAF) */
p_es->i_type = LPCM_AUDIO_ES;
+ p_es->b_audio = 1;
/* FIXME : write the decoder */
}
else
boolean_t b_trash = 0;
es_descriptor_t * p_es = NULL;
- i_code = U32_AT( p_data->p_buffer );
+ i_code = U32_AT( p_data->p_payload_start );
if( i_code <= 0x1BC )
{
switch( i_code )
{
case 0x1BA: /* PACK_START_CODE */
{
- /* Convert the SCR in microseconds. */
+ /* Read the SCR. */
mtime_t scr_time;
+ u32 i_mux_rate;
- if( (p_data->p_buffer[4] & 0xC0) == 0x40 )
+ if( (p_data->p_payload_start[4] & 0xC0) == 0x40 )
{
/* MPEG-2 */
+ byte_t p_header[14];
+ byte_t * p_byte;
+ p_byte = p_data->p_payload_start;
+
+ if( MoveChunk( p_header, &p_data, &p_byte, 14 ) != 14 )
+ {
+ intf_WarnMsg( 3, "Packet too short to have a header" );
+ b_trash = 1;
+ break;
+ }
scr_time =
- (( ((mtime_t)(p_data->p_buffer[4] & 0x38) << 27) |
- ((mtime_t)(U32_AT(p_data->p_buffer + 4) & 0x03FFF800)
+ ((mtime_t)(p_header[4] & 0x38) << 27) |
+ ((mtime_t)(U32_AT(p_header + 4) & 0x03FFF800)
<< 4) |
- ((mtime_t)(U32_AT(p_data->p_buffer + 6) & 0x03FFF800)
- >> 11)
- ) * 300) / 27;
+ ((( ((mtime_t)U16_AT(p_header + 6) << 16)
+ | (mtime_t)U16_AT(p_header + 8) ) & 0x03FFF800)
+ >> 11);
+
+ /* mux_rate */
+ i_mux_rate = ((u32)U16_AT(p_header + 10) << 6)
+ | (p_header[12] >> 2);
}
else
{
- /* MPEG-1 SCR is like PTS */
+ /* MPEG-1 SCR is like PTS. */
+ byte_t p_header[12];
+ byte_t * p_byte;
+ p_byte = p_data->p_payload_start;
+
+ if( MoveChunk( p_header, &p_data, &p_byte, 12 ) != 12 )
+ {
+ intf_WarnMsg( 3, "Packet too short to have a header" );
+ b_trash = 1;
+ break;
+ }
scr_time =
- (( ((mtime_t)(p_data->p_buffer[4] & 0x0E) << 29) |
- (((mtime_t)U16_AT(p_data->p_buffer + 5) << 14)
- - (1 << 14)) |
- ((mtime_t)U16_AT(p_data->p_buffer + 7) >> 1)
- ) * 300) / 27;
+ ((mtime_t)(p_header[4] & 0x0E) << 29) |
+ (((mtime_t)U32_AT(p_header + 4) & 0xFFFE00) << 6) |
+ ((mtime_t)p_header[7] << 7) |
+ ((mtime_t)p_header[8] >> 1);
+
+ /* mux_rate */
+ i_mux_rate = (U32_AT(p_header + 8) & 0x7FFFFE) >> 1;
}
/* Call the pace control. */
- //intf_Msg("+%lld", scr_time);
- CRDecode( p_input, p_input->stream.pp_programs[0],
- scr_time );
+ input_ClockManageRef( p_input, p_input->stream.pp_programs[0],
+ scr_time );
+
+ if( i_mux_rate != p_input->stream.i_mux_rate
+ && p_input->stream.i_mux_rate )
+ {
+ intf_WarnMsg(2,
+ "Mux_rate changed - expect cosmetic errors");
+ }
+ p_input->stream.i_mux_rate = i_mux_rate;
+
b_trash = 1;
}
break;
default:
/* This should not happen */
b_trash = 1;
- intf_WarnMsg( 1, "Unwanted packet received with start code %x",
+ intf_WarnMsg( 1, "Unwanted packet received with start code 0x%.8x",
i_code );
}
}
{
p_es = input_ParsePS( p_input, p_data );
- if( p_es != NULL && p_es->p_decoder_fifo != NULL )
+ 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) )
{
+ vlc_mutex_unlock( &p_input->stream.control.control_lock );
#ifdef STATS
p_es->c_packets++;
#endif
}
else
{
+ vlc_mutex_unlock( &p_input->stream.control.control_lock );
b_trash = 1;
}
}
/* Trash the packet if it has no payload or if it isn't selected */
if( b_trash )
{
- p_input->p_plugin->pf_delete_packet( p_input, p_data );
+ p_input->pf_delete_packet( p_input->p_method_data, p_data );
#ifdef STATS
p_input->c_packets_trashed++;
#endif
}
}
-
+
/*
* TS Demultiplexing
*/
*****************************************************************************/
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);
-
+ #define p (p_data->p_buffer)
/* Extract flags values from TS common header. */
i_pid = U16_AT(&p[1]) & 0x1fff;
b_unit_start = (p[1] & 0x40);
/* Find out the elementary stream. */
vlc_mutex_lock( &p_input->stream.stream_lock );
- p_es = input_FindES( p_input, i_pid );
- vlc_mutex_unlock( &p_input->stream.stream_lock );
+
+ 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;
+ else
+ p_pgrm_demux = (pgrm_ts_data_t *)p_es->p_pgrm->p_demux_data;
+ }
- if( p_es == NULL || p_es->p_decoder_fifo == NULL )
+ vlc_mutex_lock( &p_input->stream.control.control_lock );
+ 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;
- if( (p_es->p_decoder_fifo != NULL) || (p_pgrm_demux->i_pcr_pid == i_pid) )
+ vlc_mutex_unlock( &p_input->stream.control.control_lock );
+ vlc_mutex_unlock( &p_input->stream.stream_lock );
+
+
+ /* Don't change the order of the tests : if b_psi then p_pgrm_demux
+ * may still be null. Who said it was ugly ? */
+ if( ( p_es != NULL ) &&
+ ((p_es->p_decoder_fifo != NULL) || b_psi
+ || (p_pgrm_demux->i_pcr_pid == i_pid) ) )
{
#ifdef STATS
p_es->c_packets++;
#endif
/* Extract adaptation field information if any */
+
if( !b_adaptation )
{
/* We don't have any adaptation_field, so payload starts
/* If the PID carries the PCR, there will be a system
* time-based discontinuity. We let the PCR decoder
* handle that. */
- p_es->p_pgrm->b_discontinuity = 1;
+ p_es->p_pgrm->i_synchro_state = SYNCHRO_REINIT;
/* There also may be a continuity_counter
* discontinuity: resynchronise our counter with
/* If this is a PCR_PID, and this TS packet contains a
* PCR, we pass it along to the PCR decoder. */
+
if( (p_pgrm_demux->i_pcr_pid == i_pid) && (p[5] & 0x10) )
{
/* There should be a PCR field in the packet, check
* it. */
if( p[4] >= 7 )
{
- /* Convert the PCR in microseconds.
- * WARNING: do not remove the casts in the
- * following calculation ! */
+ /* Read the PCR. */
mtime_t pcr_time;
pcr_time =
- ( (( (mtime_t)U32_AT((u32*)&p[6]) << 1 )
- | ( p[10] >> 7 )) * 300 ) / 27;
+ ( (mtime_t)U32_AT((u32*)&p[6]) << 1 )
+ | ( p[10] >> 7 );
/* Call the pace control. */
- CRDecode( p_input, p_es->p_pgrm, pcr_time );
+ input_ClockManageRef( p_input, p_es->p_pgrm,
+ pcr_time );
}
} /* PCR ? */
} /* valid TS adaptation field ? */
} /* length > 0 */
} /* has adaptation field */
-
/* Check the continuity of the stream. */
i_dummy = ((p[3] & 0x0f) - p_es_demux->i_continuity_counter) & 0x0f;
if( i_dummy == 1 )
{
/* Everything is ok, just increase our counter */
- p_es_demux->i_continuity_counter++;
+ (p_es_demux->i_continuity_counter)++;
}
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->p_plugin->pf_delete_packet( p_input, p_data );
+ p_input->pf_delete_packet( p_input->p_method_data, p_data );
#ifdef STATS
p_input->c_packets_trashed++;
#endif
}
else
{
- if( p_es_demux->b_psi )
+ if( b_psi )
{
/* The payload contains PSI tables */
-#if 0
input_DemuxPSI( p_input, p_data, p_es,
b_unit_start, b_lost );
-#endif
+
}
else
{
/* The payload carries a PES stream */
- if( b_unit_start )
- input_GatherPES( p_input, p_data, p_es, b_unit_start, b_lost );
+ 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;
+
+ /* Lock stream information */
+ vlc_mutex_lock( &p_input->stream.stream_lock );
+
+ /* 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
+
+ /* Remove lock */
+ vlc_mutex_unlock( &p_input->stream.stream_lock );
}
projects / vlc / blobdiff