1 /*****************************************************************************
2 * dec.c : audio output API towards decoders
3 *****************************************************************************
4 * Copyright (C) 2002-2007 the VideoLAN team
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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
34 #include <vlc_input.h>
36 #include "aout_internal.h"
38 /** FIXME: Ugly but needed to access the counters */
39 #include "input/input_internal.h"
41 /*****************************************************************************
42 * aout_DecNew : create a decoder
43 *****************************************************************************/
44 static aout_input_t * DecNew( vlc_object_t * p_this, aout_instance_t * p_aout,
45 audio_sample_format_t *p_format,
46 audio_replay_gain_t *p_replay_gain )
48 aout_input_t * p_input;
49 input_thread_t * p_input_thread;
52 /* Sanitize audio format */
53 if( p_format->i_channels > 32 )
55 msg_Err( p_aout, "too many audio channels (%u)",
56 p_format->i_channels );
60 if( p_format->i_rate > 192000 )
62 msg_Err( p_aout, "excessive audio sample frequency (%u)",
67 /* We can only be called by the decoder, so no need to lock
69 vlc_mutex_lock( &p_aout->mixer_lock );
71 if ( p_aout->i_nb_inputs >= AOUT_MAX_INPUTS )
73 msg_Err( p_aout, "too many inputs already (%d)", p_aout->i_nb_inputs );
77 p_input = malloc(sizeof(aout_input_t));
78 if ( p_input == NULL )
80 msg_Err( p_aout, "out of memory" );
83 memset( p_input, 0, sizeof(aout_input_t) );
85 vlc_mutex_init( p_aout, &p_input->lock );
87 p_input->b_changed = 0;
90 if ( !p_format->i_bytes_per_frame )
91 aout_FormatPrepare( p_format );
93 p_format->i_frame_length = 1;
95 memcpy( &p_input->input, p_format,
96 sizeof(audio_sample_format_t) );
98 p_input->replay_gain = *p_replay_gain;
100 p_aout->pp_inputs[p_aout->i_nb_inputs] = p_input;
101 p_aout->i_nb_inputs++;
103 if ( p_aout->mixer.b_error )
107 var_Destroy( p_aout, "audio-device" );
108 var_Destroy( p_aout, "audio-channels" );
110 /* Recreate the output using the new format. */
111 if ( aout_OutputNew( p_aout, p_format ) < 0 )
113 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
115 vlc_mutex_lock( &p_aout->pp_inputs[i]->lock );
116 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
117 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
119 vlc_mutex_unlock( &p_aout->mixer_lock );
123 /* Create other input streams. */
124 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
126 vlc_mutex_lock( &p_aout->pp_inputs[i]->lock );
127 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
128 aout_InputNew( p_aout, p_aout->pp_inputs[i] );
129 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
134 aout_MixerDelete( p_aout );
137 if ( aout_MixerNew( p_aout ) == -1 )
139 aout_OutputDelete( p_aout );
143 aout_InputNew( p_aout, p_input );
145 vlc_mutex_unlock( &p_aout->mixer_lock );
146 var_Create( p_this, "audio-desync", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
147 var_Get( p_this, "audio-desync", &val );
148 p_input->i_desync = val.i_int * 1000;
150 p_input_thread = (input_thread_t *)vlc_object_find( p_this,
151 VLC_OBJECT_INPUT, FIND_PARENT );
154 p_input->i_pts_delay = p_input_thread->i_pts_delay;
155 p_input->i_pts_delay += p_input->i_desync;
156 p_input->p_input_thread = p_input_thread;
157 vlc_object_release( p_input_thread );
161 p_input->i_pts_delay = DEFAULT_PTS_DELAY;
162 p_input->i_pts_delay += p_input->i_desync;
163 p_input->p_input_thread = NULL;
169 vlc_mutex_unlock( &p_aout->mixer_lock );
173 aout_input_t * __aout_DecNew( vlc_object_t * p_this,
174 aout_instance_t ** pp_aout,
175 audio_sample_format_t * p_format,
176 audio_replay_gain_t *p_replay_gain )
178 if ( *pp_aout == NULL )
180 /* Create an audio output if there is none. */
181 *pp_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT, FIND_ANYWHERE );
183 if( *pp_aout == NULL )
185 msg_Dbg( p_this, "no aout present, spawning one" );
187 *pp_aout = aout_New( p_this );
188 /* Everything failed, I'm a loser, I just wanna die */
189 if( *pp_aout == NULL )
193 vlc_object_attach( *pp_aout, p_this->p_libvlc );
197 vlc_object_release( *pp_aout );
201 return DecNew( p_this, *pp_aout, p_format, p_replay_gain );
204 /*****************************************************************************
205 * aout_DecDelete : delete a decoder
206 *****************************************************************************/
207 int aout_DecDelete( aout_instance_t * p_aout, aout_input_t * p_input )
211 /* This function can only be called by the decoder itself, so no need
212 * to lock p_input->lock. */
213 vlc_mutex_lock( &p_aout->mixer_lock );
215 for ( i_input = 0; i_input < p_aout->i_nb_inputs; i_input++ )
217 if ( p_aout->pp_inputs[i_input] == p_input )
223 if ( i_input == p_aout->i_nb_inputs )
225 msg_Err( p_aout, "cannot find an input to delete" );
229 /* Remove the input from the list. */
230 memmove( &p_aout->pp_inputs[i_input], &p_aout->pp_inputs[i_input + 1],
231 (AOUT_MAX_INPUTS - i_input - 1) * sizeof(aout_input_t *) );
232 p_aout->i_nb_inputs--;
234 aout_InputDelete( p_aout, p_input );
236 vlc_mutex_destroy( &p_input->lock );
239 if ( !p_aout->i_nb_inputs )
241 aout_OutputDelete( p_aout );
242 aout_MixerDelete( p_aout );
243 if ( var_Type( p_aout, "audio-device" ) != 0 )
245 var_Destroy( p_aout, "audio-device" );
247 if ( var_Type( p_aout, "audio-channels" ) != 0 )
249 var_Destroy( p_aout, "audio-channels" );
253 vlc_mutex_unlock( &p_aout->mixer_lock );
263 /*****************************************************************************
264 * aout_DecNewBuffer : ask for a new empty buffer
265 *****************************************************************************/
266 aout_buffer_t * aout_DecNewBuffer( aout_instance_t * p_aout,
267 aout_input_t * p_input,
268 size_t i_nb_samples )
270 aout_buffer_t * p_buffer;
273 vlc_mutex_lock( &p_input->lock );
275 if ( p_input->b_error )
277 vlc_mutex_unlock( &p_input->lock );
281 duration = (1000000 * (mtime_t)i_nb_samples) / p_input->input.i_rate;
283 /* This necessarily allocates in the heap. */
284 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_buffer );
285 if( p_buffer != NULL )
286 p_buffer->i_nb_bytes = i_nb_samples * p_input->input.i_bytes_per_frame
287 / p_input->input.i_frame_length;
289 /* Suppose the decoder doesn't have more than one buffered buffer */
290 p_input->b_changed = 0;
292 vlc_mutex_unlock( &p_input->lock );
294 if( p_buffer == NULL )
297 p_buffer->i_nb_samples = i_nb_samples;
298 p_buffer->start_date = p_buffer->end_date = 0;
302 /*****************************************************************************
303 * aout_DecDeleteBuffer : destroy an undecoded buffer
304 *****************************************************************************/
305 void aout_DecDeleteBuffer( aout_instance_t * p_aout, aout_input_t * p_input,
306 aout_buffer_t * p_buffer )
308 (void)p_aout; (void)p_input;
309 aout_BufferFree( p_buffer );
312 /*****************************************************************************
313 * aout_DecPlay : filter & mix the decoded buffer
314 *****************************************************************************/
315 int aout_DecPlay( aout_instance_t * p_aout, aout_input_t * p_input,
316 aout_buffer_t * p_buffer, int i_input_rate )
318 if ( p_buffer->start_date == 0 )
320 msg_Warn( p_aout, "non-dated buffer received" );
321 aout_BufferFree( p_buffer );
325 if( i_input_rate > INPUT_RATE_DEFAULT * AOUT_MAX_INPUT_RATE ||
326 i_input_rate < INPUT_RATE_DEFAULT / AOUT_MAX_INPUT_RATE )
328 aout_BufferFree( p_buffer );
332 /* Apply the desynchronisation requested by the user */
333 p_buffer->start_date += p_input->i_desync;
334 p_buffer->end_date += p_input->i_desync;
336 if ( p_buffer->start_date > mdate() + p_input->i_pts_delay +
337 AOUT_MAX_ADVANCE_TIME )
339 msg_Warn( p_aout, "received buffer in the future ("I64Fd")",
340 p_buffer->start_date - mdate());
341 if( p_input->p_input_thread )
343 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
344 stats_UpdateInteger( p_aout,
345 p_input->p_input_thread->p->counters.p_lost_abuffers,
347 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
349 aout_BufferFree( p_buffer );
353 p_buffer->end_date = p_buffer->start_date
354 + (mtime_t)p_buffer->i_nb_samples * 1000000
355 / p_input->input.i_rate;
357 vlc_mutex_lock( &p_input->lock );
359 if ( p_input->b_error )
361 vlc_mutex_unlock( &p_input->lock );
362 aout_BufferFree( p_buffer );
366 if ( p_input->b_changed )
368 /* Maybe the allocation size has changed. Re-allocate a buffer. */
369 aout_buffer_t * p_new_buffer;
370 mtime_t duration = (1000000 * (mtime_t)p_buffer->i_nb_samples)
371 / p_input->input.i_rate;
373 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_new_buffer );
374 p_aout->p_libvlc->pf_memcpy( p_new_buffer->p_buffer, p_buffer->p_buffer,
375 p_buffer->i_nb_bytes );
376 p_new_buffer->i_nb_samples = p_buffer->i_nb_samples;
377 p_new_buffer->i_nb_bytes = p_buffer->i_nb_bytes;
378 p_new_buffer->start_date = p_buffer->start_date;
379 p_new_buffer->end_date = p_buffer->end_date;
380 aout_BufferFree( p_buffer );
381 p_buffer = p_new_buffer;
382 p_input->b_changed = 0;
385 /* If the buffer is too early, wait a while. */
386 mwait( p_buffer->start_date - AOUT_MAX_PREPARE_TIME );
388 if ( aout_InputPlay( p_aout, p_input, p_buffer, i_input_rate ) == -1 )
390 vlc_mutex_unlock( &p_input->lock );
394 vlc_mutex_unlock( &p_input->lock );
396 /* Run the mixer if it is able to run. */
397 vlc_mutex_lock( &p_aout->mixer_lock );
398 aout_MixerRun( p_aout );
399 if( p_input->p_input_thread )
401 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
402 stats_UpdateInteger( p_aout,
403 p_input->p_input_thread->p->counters.p_played_abuffers,
405 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
407 vlc_mutex_unlock( &p_aout->mixer_lock );