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

input_psi.c
(unfinished)

src/input/input_programs.c

+/*****************************************************************************
+ * 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;
+}