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 *****************************************************************************/
31 #include <vlc_common.h>
38 #include <vlc_input.h>
40 #include "aout_internal.h"
42 /** FIXME: Ugly but needed to access the counters */
43 #include "input/input_internal.h"
45 /*****************************************************************************
46 * aout_DecNew : create a decoder
47 *****************************************************************************/
48 static aout_input_t * DecNew( vlc_object_t * p_this, aout_instance_t * p_aout,
49 audio_sample_format_t *p_format,
50 audio_replay_gain_t *p_replay_gain )
52 aout_input_t * p_input;
53 input_thread_t * p_input_thread;
55 /* Sanitize audio format */
56 if( p_format->i_channels > 32 )
58 msg_Err( p_aout, "too many audio channels (%u)",
59 p_format->i_channels );
63 if( p_format->i_rate > 192000 )
65 msg_Err( p_aout, "excessive audio sample frequency (%u)",
70 /* We can only be called by the decoder, so no need to lock
72 vlc_mutex_lock( &p_aout->mixer_lock );
74 if ( p_aout->i_nb_inputs >= AOUT_MAX_INPUTS )
76 msg_Err( p_aout, "too many inputs already (%d)", p_aout->i_nb_inputs );
80 p_input = malloc(sizeof(aout_input_t));
81 if ( p_input == NULL )
83 memset( p_input, 0, sizeof(aout_input_t) );
85 vlc_mutex_init( &p_input->lock );
87 p_input->b_changed = 0;
90 aout_FormatPrepare( p_format );
92 memcpy( &p_input->input, p_format,
93 sizeof(audio_sample_format_t) );
95 p_input->replay_gain = *p_replay_gain;
97 p_aout->pp_inputs[p_aout->i_nb_inputs] = p_input;
98 p_aout->i_nb_inputs++;
100 if ( p_aout->mixer.b_error )
104 var_Destroy( p_aout, "audio-device" );
105 var_Destroy( p_aout, "audio-channels" );
107 /* Recreate the output using the new format. */
108 if ( aout_OutputNew( p_aout, p_format ) < 0 )
110 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
112 vlc_mutex_lock( &p_aout->pp_inputs[i]->lock );
113 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
114 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
116 vlc_mutex_unlock( &p_aout->mixer_lock );
120 /* Create other input streams. */
121 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
123 vlc_mutex_lock( &p_aout->pp_inputs[i]->lock );
124 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
125 aout_InputNew( p_aout, p_aout->pp_inputs[i] );
126 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
131 aout_MixerDelete( p_aout );
134 if ( aout_MixerNew( p_aout ) == -1 )
136 aout_OutputDelete( p_aout );
140 aout_InputNew( p_aout, p_input );
142 vlc_mutex_unlock( &p_aout->mixer_lock );
143 p_input->i_desync = var_CreateGetInteger( p_this, "audio-desync" ) * 1000;
145 p_input_thread = (input_thread_t *)vlc_object_find( p_this,
146 VLC_OBJECT_INPUT, FIND_PARENT );
149 p_input->i_pts_delay = p_input_thread->i_pts_delay;
150 p_input->i_pts_delay += p_input->i_desync;
151 p_input->p_input_thread = p_input_thread;
152 vlc_object_release( p_input_thread );
156 p_input->i_pts_delay = DEFAULT_PTS_DELAY;
157 p_input->i_pts_delay += p_input->i_desync;
158 p_input->p_input_thread = NULL;
164 vlc_mutex_unlock( &p_aout->mixer_lock );
168 aout_input_t * __aout_DecNew( vlc_object_t * p_this,
169 aout_instance_t ** pp_aout,
170 audio_sample_format_t * p_format,
171 audio_replay_gain_t *p_replay_gain )
173 aout_instance_t *p_aout = *pp_aout;
174 if ( p_aout == NULL )
176 msg_Dbg( p_this, "no aout present, spawning one" );
177 p_aout = aout_New( p_this );
179 /* Everything failed, I'm a loser, I just wanna die */
183 vlc_object_attach( p_aout, p_this );
187 return DecNew( p_this, p_aout, p_format, p_replay_gain );
190 /*****************************************************************************
191 * aout_DecDelete : delete a decoder
192 *****************************************************************************/
193 int aout_DecDelete( aout_instance_t * p_aout, aout_input_t * p_input )
197 /* This function can only be called by the decoder itself, so no need
198 * to lock p_input->lock. */
199 vlc_mutex_lock( &p_aout->mixer_lock );
201 for ( i_input = 0; i_input < p_aout->i_nb_inputs; i_input++ )
203 if ( p_aout->pp_inputs[i_input] == p_input )
209 if ( i_input == p_aout->i_nb_inputs )
211 msg_Err( p_aout, "cannot find an input to delete" );
215 /* Remove the input from the list. */
216 memmove( &p_aout->pp_inputs[i_input], &p_aout->pp_inputs[i_input + 1],
217 (AOUT_MAX_INPUTS - i_input - 1) * sizeof(aout_input_t *) );
218 p_aout->i_nb_inputs--;
220 aout_InputDelete( p_aout, p_input );
222 vlc_mutex_destroy( &p_input->lock );
225 if ( !p_aout->i_nb_inputs )
227 aout_OutputDelete( p_aout );
228 aout_MixerDelete( p_aout );
229 if ( var_Type( p_aout, "audio-device" ) != 0 )
231 var_Destroy( p_aout, "audio-device" );
233 if ( var_Type( p_aout, "audio-channels" ) != 0 )
235 var_Destroy( p_aout, "audio-channels" );
239 vlc_mutex_unlock( &p_aout->mixer_lock );
249 /*****************************************************************************
250 * aout_DecNewBuffer : ask for a new empty buffer
251 *****************************************************************************/
252 aout_buffer_t * aout_DecNewBuffer( aout_input_t * p_input,
253 size_t i_nb_samples )
255 aout_buffer_t * p_buffer;
258 vlc_mutex_lock( &p_input->lock );
260 if ( p_input->b_error )
262 vlc_mutex_unlock( &p_input->lock );
266 duration = (1000000 * (mtime_t)i_nb_samples) / p_input->input.i_rate;
268 /* This necessarily allocates in the heap. */
269 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_buffer );
270 if( p_buffer != NULL )
271 p_buffer->i_nb_bytes = i_nb_samples * p_input->input.i_bytes_per_frame
272 / p_input->input.i_frame_length;
274 /* Suppose the decoder doesn't have more than one buffered buffer */
275 p_input->b_changed = 0;
277 vlc_mutex_unlock( &p_input->lock );
279 if( p_buffer == NULL )
282 p_buffer->i_nb_samples = i_nb_samples;
283 p_buffer->start_date = p_buffer->end_date = 0;
287 /*****************************************************************************
288 * aout_DecDeleteBuffer : destroy an undecoded buffer
289 *****************************************************************************/
290 void aout_DecDeleteBuffer( aout_instance_t * p_aout, aout_input_t * p_input,
291 aout_buffer_t * p_buffer )
293 (void)p_aout; (void)p_input;
294 aout_BufferFree( p_buffer );
297 /*****************************************************************************
298 * aout_DecPlay : filter & mix the decoded buffer
299 *****************************************************************************/
300 int aout_DecPlay( aout_instance_t * p_aout, aout_input_t * p_input,
301 aout_buffer_t * p_buffer, int i_input_rate )
303 if ( p_buffer->start_date == 0 )
305 msg_Warn( p_aout, "non-dated buffer received" );
306 aout_BufferFree( p_buffer );
310 if( i_input_rate > INPUT_RATE_DEFAULT * AOUT_MAX_INPUT_RATE ||
311 i_input_rate < INPUT_RATE_DEFAULT / AOUT_MAX_INPUT_RATE )
313 aout_BufferFree( p_buffer );
317 /* Apply the desynchronisation requested by the user */
318 p_buffer->start_date += p_input->i_desync;
319 p_buffer->end_date += p_input->i_desync;
321 if ( p_buffer->start_date > mdate() + p_input->i_pts_delay +
322 AOUT_MAX_ADVANCE_TIME )
324 msg_Warn( p_aout, "received buffer in the future (%"PRId64")",
325 p_buffer->start_date - mdate());
326 if( p_input->p_input_thread )
328 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
329 stats_UpdateInteger( p_aout,
330 p_input->p_input_thread->p->counters.p_lost_abuffers,
332 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
334 aout_BufferFree( p_buffer );
338 p_buffer->end_date = p_buffer->start_date
339 + (mtime_t)p_buffer->i_nb_samples * 1000000
340 / p_input->input.i_rate;
342 vlc_mutex_lock( &p_input->lock );
344 if ( p_input->b_error )
346 vlc_mutex_unlock( &p_input->lock );
347 aout_BufferFree( p_buffer );
351 if ( p_input->b_changed )
353 /* Maybe the allocation size has changed. Re-allocate a buffer. */
354 aout_buffer_t * p_new_buffer;
355 mtime_t duration = (1000000 * (mtime_t)p_buffer->i_nb_samples)
356 / p_input->input.i_rate;
358 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_new_buffer );
359 vlc_memcpy( p_new_buffer->p_buffer, p_buffer->p_buffer,
360 p_buffer->i_nb_bytes );
361 p_new_buffer->i_nb_samples = p_buffer->i_nb_samples;
362 p_new_buffer->i_nb_bytes = p_buffer->i_nb_bytes;
363 p_new_buffer->start_date = p_buffer->start_date;
364 p_new_buffer->end_date = p_buffer->end_date;
365 aout_BufferFree( p_buffer );
366 p_buffer = p_new_buffer;
367 p_input->b_changed = 0;
370 /* If the buffer is too early, wait a while. */
371 mwait( p_buffer->start_date - AOUT_MAX_PREPARE_TIME );
373 if ( aout_InputPlay( p_aout, p_input, p_buffer, i_input_rate ) == -1 )
375 vlc_mutex_unlock( &p_input->lock );
379 vlc_mutex_unlock( &p_input->lock );
381 /* Run the mixer if it is able to run. */
382 vlc_mutex_lock( &p_aout->mixer_lock );
383 aout_MixerRun( p_aout );
384 if( p_input->p_input_thread )
386 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
387 stats_UpdateInteger( p_aout,
388 p_input->p_input_thread->p->counters.p_played_abuffers,
390 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
392 vlc_mutex_unlock( &p_aout->mixer_lock );