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* Code to manage es_descriptors and program_descriptors, from benny's 

input_psi.c
(unfinished)
This commit is contained in:
Christophe Massiot 2000-12-08 18:50:37 +00:00
parent 1a36621c47
commit b2181174d0
1 changed files with 227 additions and 0 deletions
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src/input/input_programs.c Normal file
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/*****************************************************************************
* input_programs.c: es_descriptor_t, pgrm_descriptor_t management
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
*
* Authors:
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
/*****************************************************************************
* input_InitStream: init the stream descriptor of the given input
*****************************************************************************/
void input_InitStream( input_thread_t * p_input )
{
p_input->stream->i_pgrm_number = 0;
p_input->stream->pp_programs = NULL;
}
/*****************************************************************************
* input_AddProgram: add and init a program descriptor
*****************************************************************************
* This program descriptor will be referenced in the given stream descriptor
*****************************************************************************/
pgrm_descriptor_t * input_AddProgram( input_thread_t * p_input,
u16 i_pgrm_id)
{
int i_pgrm_index = p_stream->i_pgrm_number; /* Where to add the pgrm */
intf_DbgMsg("Adding description for pgrm %d", i_pgrm_id);
/* Add an entry to the list of program associated with the stream */
p_input->stream.i_pgrm_number++;
p_input->stream.pp_programs = realloc( p_input->stream.pp_programs,
p_input->stream.i_pgrm_number
* sizeof(pgrm_descriptor_t *) );
/* Allocate the structure to store this description */
p_input->stream.pp_programs[i_pgrm_index] =
malloc( sizeof(pgrm_descriptor_t) );
/* Init this entry */
p_input->stream.pp_programs[i_pgrm_index]->i_number = i_pgrm_id;
p_input->stream.pp_programs[i_pgrm_index]->b_is_ok = 0;
p_input->stream.pp_programs[i_pgrm_index]->i_es_number = 0;
p_input->stream.pp_programs[i_pgrm_index]->pp_es = NULL;
p_input->stream.pp_programs[i_pgrm_index]->delta_cr = 0;
p_input->stream.pp_programs[i_pgrm_index]->delta_absolute = 0;
p_input->stream.pp_programs[i_pgrm_index]->last_cr = 0;
p_input->stream.pp_programs[i_pgrm_index]->c_average_count = 0;
p_input->stream.pp_programs[i_pgrm_index]->i_synchro_state
= SYNCHRO_NOT_STARTED;
p_input->stream.pp_programs[i_pgrm_index]->p_vout
= p_input->p_default_vout;
p_input->stream.pp_programs[i_pgrm_index]->p_aout
= p_input->p_default_aout;
return p_input->stream.pp_programs[i_pgrm_index];
}
/*****************************************************************************
* input_DelProgram: destroy a program descriptor
*****************************************************************************
* All ES descriptions referenced in the descriptor will be deleted.
*****************************************************************************/
void input_DelProgram( input_thread_t * p_input, u16 i_pgrm_id )
{
int i_index, i_pgrm_index = -1;
pgrm_descriptor_t * p_pgrm = NULL;
intf_DbgMsg("Deleting description for pgrm %d", i_pgrm_id);
/* Find where this program is described */
for( i_index = 0; i_index < p_input->stream.i_pgrm_number; i_index++ )
{
if( p_input->stream.pp_programs[i_index]->i_number == i_pgrm_id )
{
i_pgrm_index = i_index;
p_pgrm = p_input->stream.pp_programs[ i_pgrm_index ];
break;
}
}
/* Make sure that the pgrm exists */
ASSERT(i_pgrm_index >= 0);
ASSERT(p_pgrm);
/* Free the structures that describe the es that belongs to that program */
for( i_index = 0; i_index < p_pgrm->i_es_number; i_index++ )
{
DestroyESDescr( p_input, p_pgrm, p_pgrm->pp_es[i_index]->i_id );
}
/* Free the table of es descriptors */
free( p_pgrm->pp_es );
/* Free the description of this stream */
free( p_pgrm );
/* Remove this program from the stream's list of programs */
p_input->stream.i_pgrm_number--;
p_input->stream.pp_programs[i_pgrm_index] =
p_input->stream.pp_programs[p_input->stream.i_pgrm_number];
p_input->stream.pp_programs = realloc( p_input->stream.pp_programs,
p_input->stream.i_pgrm_number
* sizeof(pgrm_descriptor_t *) );
}
/*****************************************************************************
* input_AddES:
*****************************************************************************
* Reserve a slot in the table of ES descriptors for the ES and add it to the
* list of ES of p_pgrm. If p_pgrm if NULL, then the ES is considered as stand
* alone (PSI ?)
*****************************************************************************/
es_descriptor_t * input_AddES( input_thread_t * p_input,
pgrm_descriptor_t * p_pgrm, u16 i_es_id)
{
int i_index;
es_descriptor_t * p_es = NULL;
intf_DbgMsg("Adding description for ES %d", i_es_id);
/* Find an empty slot to store the description of that es */
for( i_index = 0; i_index < INPUT_MAX_ES &&
p_input->p_es[i_index].i_id != EMPTY_ID; i_index++ );
if( i_index >= INPUT_MAX_ES )
{
/* No slot is empty */
intf_ErrMsg("Stream carries too many ES for our decoder");
}
else
{
/* Reserve the slot for that ES */
p_es = &p_input->p_es[i_index];
p_es->i_id = i_es_id;
intf_DbgMsg("Slot %d in p_es table assigned to ES %d",
i_index, i_es_pid);
/* Init its values */
p_es->b_discontinuity = 0;
p_es->p_pes_packet = NULL;
p_es->p_decoder_fifo = NULL;
/* Add this ES to the program definition if one is given */
if( p_pgrm )
{
p_pgrm->i_es_number++;
p_pgrm->pp_es = realloc( p_pgrm->pp_es,
p_pgrm->i_es_number
* sizeof(es_descriptor_t *) );
p_pgrm->pp_es[p_pgrm->i_es_number - 1] = p_es;
p_es->p_pgrm = p_pgrm;
}
else
{
p_es->p_pgrm = NULL;
}
}
return p_es;
}
/*****************************************************************************
* input_DelES:
*****************************************************************************/
void input_DelES( input_thread_t * p_input, u16 i_id)
{
int i_index;
program_descriptor_t * p_pgrm;
es_descriptor_t * p_es;
/* Look for the description of the ES */
for( i_index = 0; i_index < INPUT_MAX_ES; i_index++ )
{
if( p_input->p_es[i_index].i_id == i_id )
{
p_es = &p_input->p_es[i_index];
p_pgrm = p_input->p_es[i_index].p_pgrm;
break;
}
}
ASSERT( p_es );
/* Remove this ES from the description of the program if it is associated to
* one */
if( p_pgrm )
{
for( i_index = 0; ; i_index++ )
{
if( p_pgrm->p_es[i_index].i_id == i_id )
{
p_pgrm->i_es_number--;
p_pgrm->pp_es[i_index] = p_pgrm->p_es[p_pgrm->i_es_number];
p_pgrm->pp_es = realloc( p_pgrm->pp_es,
p_pgrm->i_es_number
* sizeof(es_decriptor_t *));
break;
}
}
}
/* The table of stream descriptors is static, so don't free memory
* but just mark the slot as unused */
p_es->i_id = EMPTY_ID;
}