git.sesse.net Git - vlc/blob - src/input/input_dec.c

   1 /*****************************************************************************
   2  * input_dec.c: Functions for the management of decoders
   3  *****************************************************************************
   4  * Copyright (C) 1999, 2000 VideoLAN
   5  * $Id: input_dec.c,v 1.8 2001/02/08 13:52:35 massiot Exp $
   6  *
   7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include "defs.h"
  28
  29 #include <stdlib.h>
  30 #include "config.h"
  31 #include "common.h"
  32 #include "threads.h"
  33 #include "mtime.h"
  34 #include "intf_msg.h"
  35
  36 #include "stream_control.h"
  37 #include "input_ext-dec.h"
  38 #include "input_ext-intf.h"
  39
  40 #include "input.h"
  41
  42 /*****************************************************************************
  43  * input_RunDecoder: spawns a new decoder thread
  44  *****************************************************************************/
  45 vlc_thread_t input_RunDecoder( decoder_capabilities_t * p_decoder,
  46                                void * p_data )
  47 {
  48     return( p_decoder->pf_create_thread( p_data ) );
  49 }
  50
  51 /*****************************************************************************
  52  * input_EndDecoder: kills a decoder thread and waits until it's finished
  53  *****************************************************************************/
  54 void input_EndDecoder( input_thread_t * p_input, es_descriptor_t * p_es )
  55 {
  56     int i_dummy;
  57
  58     p_es->p_decoder_fifo->b_die = 1;
  59
  60     /* Make sure the thread leaves the NextDataPacket() function by
  61      * sending it a few null packets. */
  62     for( i_dummy = 0; i_dummy < PADDING_PACKET_NUMBER; i_dummy++ )
  63     {
  64         input_NullPacket( p_input, p_es );
  65     }
  66
  67     if( p_es->p_pes != NULL )
  68     {
  69         input_DecodePES( p_es->p_decoder_fifo, p_es->p_pes );
  70     }
  71
  72     /* Waiting for the thread to exit */
  73     vlc_thread_join( p_es->thread_id );
  74
  75     /* Freeing all packets still in the decoder fifo. */
  76     while( !DECODER_FIFO_ISEMPTY( *p_es->p_decoder_fifo ) )
  77     {
  78         p_es->p_decoder_fifo->pf_delete_pes(
  79                             p_es->p_decoder_fifo->p_packets_mgt,
  80                             DECODER_FIFO_START( *p_es->p_decoder_fifo ) );
  81         DECODER_FIFO_INCSTART( *p_es->p_decoder_fifo );
  82     }
  83
  84     /* Destroy the lock and cond */
  85     vlc_cond_destroy( &p_es->p_decoder_fifo->data_wait );
  86     vlc_mutex_destroy( &p_es->p_decoder_fifo->data_lock );
  87
  88     free( p_es->p_decoder_fifo );
  89     p_es->p_decoder_fifo = NULL;
  90 }
  91
  92 /*****************************************************************************
  93  * input_DecodePES
  94  *****************************************************************************
  95  * Put a PES in the decoder's fifo.
  96  *****************************************************************************/
  97 void input_DecodePES( decoder_fifo_t * p_decoder_fifo, pes_packet_t * p_pes )
  98 {
  99     vlc_mutex_lock( &p_decoder_fifo->data_lock );
 100
 101     if( !DECODER_FIFO_ISFULL( *p_decoder_fifo ) )
 102     {
 103         p_decoder_fifo->buffer[p_decoder_fifo->i_end] = p_pes;
 104         DECODER_FIFO_INCEND( *p_decoder_fifo );
 105
 106         /* Warn the decoder that it's got work to do. */
 107         vlc_cond_signal( &p_decoder_fifo->data_wait );
 108     }
 109     else
 110     {
 111         /* The FIFO is full !!! This should not happen. */
 112         p_decoder_fifo->pf_delete_pes( p_decoder_fifo->p_packets_mgt,
 113                                        p_pes );
 114         intf_ErrMsg( "PES trashed - fifo full !" );
 115     }
 116     vlc_mutex_unlock( &p_decoder_fifo->data_lock );
 117 }
 118
 119 /*****************************************************************************
 120  * input_EscapeDiscontinuity: send a NULL packet to the decoders
 121  *****************************************************************************/
 122 void input_EscapeDiscontinuity( input_thread_t * p_input,
 123                                 pgrm_descriptor_t * p_pgrm )
 124 {
 125     int     i_es, i;
 126
 127     for( i_es = 0; i_es < p_pgrm->i_es_number; i_es++ )
 128     {
 129         es_descriptor_t * p_es = p_pgrm->pp_es[i_es];
 130
 131         if( p_es->p_decoder_fifo != NULL )
 132         {
 133             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 134             {
 135                 input_NullPacket( p_input, p_es );
 136             }
 137         }
 138     }
 139 }
 140
 141 /*****************************************************************************
 142  * input_EscapeAudioDiscontinuity: send a NULL packet to the audio decoders
 143  *****************************************************************************/
 144 void input_EscapeAudioDiscontinuity( input_thread_t * p_input,
 145                                      pgrm_descriptor_t * p_pgrm )
 146 {
 147     int     i_es, i;
 148
 149     for( i_es = 0; i_es < p_pgrm->i_es_number; i_es++ )
 150     {
 151         es_descriptor_t * p_es = p_pgrm->pp_es[i_es];
 152
 153         if( p_es->p_decoder_fifo != NULL && p_es->b_audio )
 154         {
 155             for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
 156             {
 157                 input_NullPacket( p_input, p_es );
 158             }
 159         }
 160     }
 161 }
 162