1 /*****************************************************************************
2 * input_dec.c: Functions for the management of decoders
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
5 * $Id: input_dec.c,v 1.25 2002/02/05 21:46:41 gbazin Exp $
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
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.
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.
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 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
28 #include <string.h> /* memcpy(), memset() */
29 #include <sys/types.h> /* off_t */
31 #include <videolan/vlc.h>
33 #include "stream_control.h"
34 #include "input_ext-dec.h"
35 #include "input_ext-intf.h"
36 #include "input_ext-plugins.h"
38 static decoder_config_t * CreateDecoderConfig( input_thread_t * p_input,
39 es_descriptor_t * p_es );
40 static void DeleteDecoderConfig( decoder_config_t * p_config );
42 /*****************************************************************************
43 * input_RunDecoder: spawns a new decoder thread
44 *****************************************************************************/
45 vlc_thread_t input_RunDecoder( input_thread_t * p_input,
46 es_descriptor_t * p_es )
48 probedata_t probedata;
49 vlc_thread_t thread_id;
50 char * psz_plugin = NULL;
52 /* Get a suitable module */
53 probedata.i_type = p_es->i_type;
55 if( p_es->i_type == MPEG1_AUDIO_ES || p_es->i_type == MPEG2_AUDIO_ES )
57 psz_plugin = main_GetPszVariable( ADEC_MPEG_VAR, NULL );
59 if( p_es->i_type == AC3_AUDIO_ES )
61 psz_plugin = main_GetPszVariable( ADEC_AC3_VAR, NULL );
64 p_es->p_module = module_Need( MODULE_CAPABILITY_DECODER, psz_plugin, &probedata );
65 if( p_es->p_module == NULL )
67 intf_ErrMsg( "input error: no suitable decoder module for type 0x%x",
72 /* Create the decoder configuration structure */
73 p_es->p_config = CreateDecoderConfig( p_input, p_es );
75 if( p_es->p_config == NULL )
77 intf_ErrMsg( "input error: could not create decoder config" );
78 module_Unneed( p_es->p_module );
82 /* Spawn the decoder thread */
83 if ( vlc_thread_create( &thread_id, "decoder",
84 (vlc_thread_func_t)p_es->p_module->
85 p_functions->dec.functions.dec.pf_run,
86 (void *)p_es->p_config) )
88 intf_ErrMsg( "input error: can't spawn decoder thread \"%s\"",
89 p_es->p_module->psz_name );
90 free( p_es->p_config );
91 module_Unneed( p_es->p_module );
95 intf_DbgMsg( "input debug: decoder \"%s\"thread created",
96 p_es->p_module->psz_name );
102 /*****************************************************************************
103 * input_EndDecoder: kills a decoder thread and waits until it's finished
104 *****************************************************************************/
105 void input_EndDecoder( input_thread_t * p_input, es_descriptor_t * p_es )
109 p_es->p_decoder_fifo->b_die = 1;
111 /* Make sure the thread leaves the NextDataPacket() function by
112 * sending it a few null packets. */
113 for( i_dummy = 0; i_dummy < PADDING_PACKET_NUMBER; i_dummy++ )
115 input_NullPacket( p_input, p_es );
118 if( p_es->p_pes != NULL )
120 input_DecodePES( p_es->p_decoder_fifo, p_es->p_pes );
123 /* Waiting for the thread to exit */
124 /* I thought that unlocking was better since thread join can be long
125 * but it actually creates late pictures and freezes --stef */
126 // vlc_mutex_unlock( &p_input->stream.stream_lock );
127 vlc_thread_join( p_es->thread_id );
128 // vlc_mutex_lock( &p_input->stream.stream_lock );
130 /* Delete decoder configuration */
131 DeleteDecoderConfig( p_es->p_config );
134 module_Unneed( p_es->p_module );
136 /* Tell the input there is no more decoder */
137 p_es->p_decoder_fifo = NULL;
140 /*****************************************************************************
142 *****************************************************************************
143 * Put a PES in the decoder's fifo.
144 *****************************************************************************/
145 void input_DecodePES( decoder_fifo_t * p_decoder_fifo, pes_packet_t * p_pes )
147 vlc_mutex_lock( &p_decoder_fifo->data_lock );
149 p_pes->p_next = NULL;
150 *p_decoder_fifo->pp_last = p_pes;
151 p_decoder_fifo->pp_last = &p_pes->p_next;
152 p_decoder_fifo->i_depth++;
154 /* Warn the decoder that it's got work to do. */
155 vlc_cond_signal( &p_decoder_fifo->data_wait );
156 vlc_mutex_unlock( &p_decoder_fifo->data_lock );
159 /*****************************************************************************
160 * input_EscapeDiscontinuity: send a NULL packet to the decoders
161 *****************************************************************************/
162 void input_EscapeDiscontinuity( input_thread_t * p_input,
163 pgrm_descriptor_t * p_pgrm )
167 for( i_es = 0; i_es < p_pgrm->i_es_number; i_es++ )
169 es_descriptor_t * p_es = p_pgrm->pp_es[i_es];
171 if( p_es->p_decoder_fifo != NULL )
173 for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
175 input_NullPacket( p_input, p_es );
181 /*****************************************************************************
182 * input_EscapeAudioDiscontinuity: send a NULL packet to the audio decoders
183 *****************************************************************************/
184 void input_EscapeAudioDiscontinuity( input_thread_t * p_input )
188 for( i_pgrm = 0; i_pgrm < p_input->stream.i_pgrm_number; i_pgrm++ )
190 pgrm_descriptor_t * p_pgrm = p_input->stream.pp_programs[i_pgrm];
192 for( i_es = 0; i_es < p_pgrm->i_es_number; i_es++ )
194 es_descriptor_t * p_es = p_pgrm->pp_es[i_es];
196 if( p_es->p_decoder_fifo != NULL && p_es->b_audio )
198 for( i = 0; i < PADDING_PACKET_NUMBER; i++ )
200 input_NullPacket( p_input, p_es );
207 /*****************************************************************************
208 * CreateDecoderConfig: create a decoder_config_t
209 *****************************************************************************/
210 static decoder_config_t * CreateDecoderConfig( input_thread_t * p_input,
211 es_descriptor_t * p_es )
213 decoder_config_t * p_config;
215 p_config = (decoder_config_t *)malloc( sizeof(decoder_config_t) );
216 if( p_config == NULL )
218 intf_ErrMsg( "Unable to allocate memory in CreateDecoderConfig" );
223 if( (p_config->p_decoder_fifo =
224 (decoder_fifo_t *)malloc( sizeof(decoder_fifo_t) )) == NULL )
226 intf_ErrMsg( "Out of memory" );
231 /* Select a new ES */
232 p_input->stream.i_selected_es_number++;
233 p_input->stream.pp_selected_es = realloc(
234 p_input->stream.pp_selected_es,
235 p_input->stream.i_selected_es_number
236 * sizeof(es_descriptor_t *) );
237 if( p_input->stream.pp_selected_es == NULL )
239 intf_ErrMsg( "Unable to realloc memory" );
240 free( p_config->p_decoder_fifo );
244 p_input->stream.pp_selected_es[p_input->stream.i_selected_es_number - 1]
247 /* Initialize the p_config structure */
248 vlc_mutex_init(&p_config->p_decoder_fifo->data_lock);
249 vlc_cond_init(&p_config->p_decoder_fifo->data_wait);
250 p_es->p_decoder_fifo = p_config->p_decoder_fifo;
252 p_config->i_id = p_es->i_id;
253 p_config->i_type = p_es->i_type;
254 p_config->p_stream_ctrl = &p_input->stream.control;
256 p_config->p_decoder_fifo->p_first = NULL;
257 p_config->p_decoder_fifo->pp_last = &p_config->p_decoder_fifo->p_first;
258 p_config->p_decoder_fifo->i_depth = 0;
259 p_config->p_decoder_fifo->b_die = p_config->p_decoder_fifo->b_error = 0;
260 p_config->p_decoder_fifo->p_packets_mgt = p_input->p_method_data;
261 p_config->p_decoder_fifo->pf_delete_pes = p_input->pf_delete_pes;
266 /*****************************************************************************
267 * DeleteDecoderConfig: create a decoder_config_t
268 *****************************************************************************/
269 static void DeleteDecoderConfig( decoder_config_t * p_config )
271 intf_StatMsg( "input stats: killing decoder for 0x%x, type 0x%x, %d PES in FIFO",
272 p_config->i_id, p_config->i_type,
273 p_config->p_decoder_fifo->i_depth );
274 /* Free all packets still in the decoder fifo. */
275 p_config->p_decoder_fifo->pf_delete_pes(
276 p_config->p_decoder_fifo->p_packets_mgt,
277 p_config->p_decoder_fifo->p_first );
279 /* Destroy the lock and cond */
280 vlc_cond_destroy( &p_config->p_decoder_fifo->data_wait );
281 vlc_mutex_destroy( &p_config->p_decoder_fifo->data_lock );
283 free( p_config->p_decoder_fifo );