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 *****************************************************************************/
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 msg_Err( p_aout, "out of memory" );
86 memset( p_input, 0, sizeof(aout_input_t) );
88 vlc_mutex_init( p_aout, &p_input->lock );
90 p_input->b_changed = 0;
93 aout_FormatPrepare( p_format );
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 p_input->i_desync = var_CreateGetInteger( p_this, "audio-desync" ) * 1000;
148 p_input_thread = (input_thread_t *)vlc_object_find( p_this,
149 VLC_OBJECT_INPUT, FIND_PARENT );
152 p_input->i_pts_delay = p_input_thread->i_pts_delay;
153 p_input->i_pts_delay += p_input->i_desync;
154 p_input->p_input_thread = p_input_thread;
155 vlc_object_release( p_input_thread );
159 p_input->i_pts_delay = DEFAULT_PTS_DELAY;
160 p_input->i_pts_delay += p_input->i_desync;
161 p_input->p_input_thread = NULL;
167 vlc_mutex_unlock( &p_aout->mixer_lock );
171 aout_input_t * __aout_DecNew( vlc_object_t * p_this,
172 aout_instance_t ** pp_aout,
173 audio_sample_format_t * p_format,
174 audio_replay_gain_t *p_replay_gain )
176 if ( *pp_aout == NULL )
178 /* Create an audio output if there is none. */
179 *pp_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT, FIND_ANYWHERE );
181 if( *pp_aout == NULL )
183 msg_Dbg( p_this, "no aout present, spawning one" );
185 *pp_aout = aout_New( p_this );
186 /* Everything failed, I'm a loser, I just wanna die */
187 if( *pp_aout == NULL )
191 vlc_object_attach( *pp_aout, p_this->p_libvlc );
195 vlc_object_release( *pp_aout );
199 return DecNew( p_this, *pp_aout, p_format, p_replay_gain );
202 /*****************************************************************************
203 * aout_DecDelete : delete a decoder
204 *****************************************************************************/
205 int aout_DecDelete( aout_instance_t * p_aout, aout_input_t * p_input )
209 /* This function can only be called by the decoder itself, so no need
210 * to lock p_input->lock. */
211 vlc_mutex_lock( &p_aout->mixer_lock );
213 for ( i_input = 0; i_input < p_aout->i_nb_inputs; i_input++ )
215 if ( p_aout->pp_inputs[i_input] == p_input )
221 if ( i_input == p_aout->i_nb_inputs )
223 msg_Err( p_aout, "cannot find an input to delete" );
227 /* Remove the input from the list. */
228 memmove( &p_aout->pp_inputs[i_input], &p_aout->pp_inputs[i_input + 1],
229 (AOUT_MAX_INPUTS - i_input - 1) * sizeof(aout_input_t *) );
230 p_aout->i_nb_inputs--;
232 aout_InputDelete( p_aout, p_input );
234 vlc_mutex_destroy( &p_input->lock );
237 if ( !p_aout->i_nb_inputs )
239 aout_OutputDelete( p_aout );
240 aout_MixerDelete( p_aout );
241 if ( var_Type( p_aout, "audio-device" ) != 0 )
243 var_Destroy( p_aout, "audio-device" );
245 if ( var_Type( p_aout, "audio-channels" ) != 0 )
247 var_Destroy( p_aout, "audio-channels" );
251 vlc_mutex_unlock( &p_aout->mixer_lock );
261 /*****************************************************************************
262 * aout_DecNewBuffer : ask for a new empty buffer
263 *****************************************************************************/
264 aout_buffer_t * aout_DecNewBuffer( aout_input_t * p_input,
265 size_t i_nb_samples )
267 aout_buffer_t * p_buffer;
270 vlc_mutex_lock( &p_input->lock );
272 if ( p_input->b_error )
274 vlc_mutex_unlock( &p_input->lock );
278 duration = (1000000 * (mtime_t)i_nb_samples) / p_input->input.i_rate;
280 /* This necessarily allocates in the heap. */
281 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_buffer );
282 if( p_buffer != NULL )
283 p_buffer->i_nb_bytes = i_nb_samples * p_input->input.i_bytes_per_frame
284 / p_input->input.i_frame_length;
286 /* Suppose the decoder doesn't have more than one buffered buffer */
287 p_input->b_changed = 0;
289 vlc_mutex_unlock( &p_input->lock );
291 if( p_buffer == NULL )
294 p_buffer->i_nb_samples = i_nb_samples;
295 p_buffer->start_date = p_buffer->end_date = 0;
299 /*****************************************************************************
300 * aout_DecDeleteBuffer : destroy an undecoded buffer
301 *****************************************************************************/
302 void aout_DecDeleteBuffer( aout_instance_t * p_aout, aout_input_t * p_input,
303 aout_buffer_t * p_buffer )
305 (void)p_aout; (void)p_input;
306 aout_BufferFree( p_buffer );
309 /*****************************************************************************
310 * aout_DecPlay : filter & mix the decoded buffer
311 *****************************************************************************/
312 int aout_DecPlay( aout_instance_t * p_aout, aout_input_t * p_input,
313 aout_buffer_t * p_buffer, int i_input_rate )
315 if ( p_buffer->start_date == 0 )
317 msg_Warn( p_aout, "non-dated buffer received" );
318 aout_BufferFree( p_buffer );
322 if( i_input_rate > INPUT_RATE_DEFAULT * AOUT_MAX_INPUT_RATE ||
323 i_input_rate < INPUT_RATE_DEFAULT / AOUT_MAX_INPUT_RATE )
325 aout_BufferFree( p_buffer );
329 /* Apply the desynchronisation requested by the user */
330 p_buffer->start_date += p_input->i_desync;
331 p_buffer->end_date += p_input->i_desync;
333 if ( p_buffer->start_date > mdate() + p_input->i_pts_delay +
334 AOUT_MAX_ADVANCE_TIME )
336 msg_Warn( p_aout, "received buffer in the future ("I64Fd")",
337 p_buffer->start_date - mdate());
338 if( p_input->p_input_thread )
340 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
341 stats_UpdateInteger( p_aout,
342 p_input->p_input_thread->p->counters.p_lost_abuffers,
344 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
346 aout_BufferFree( p_buffer );
350 p_buffer->end_date = p_buffer->start_date
351 + (mtime_t)p_buffer->i_nb_samples * 1000000
352 / p_input->input.i_rate;
354 vlc_mutex_lock( &p_input->lock );
356 if ( p_input->b_error )
358 vlc_mutex_unlock( &p_input->lock );
359 aout_BufferFree( p_buffer );
363 if ( p_input->b_changed )
365 /* Maybe the allocation size has changed. Re-allocate a buffer. */
366 aout_buffer_t * p_new_buffer;
367 mtime_t duration = (1000000 * (mtime_t)p_buffer->i_nb_samples)
368 / p_input->input.i_rate;
370 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_new_buffer );
371 p_aout->p_libvlc->pf_memcpy( p_new_buffer->p_buffer, p_buffer->p_buffer,
372 p_buffer->i_nb_bytes );
373 p_new_buffer->i_nb_samples = p_buffer->i_nb_samples;
374 p_new_buffer->i_nb_bytes = p_buffer->i_nb_bytes;
375 p_new_buffer->start_date = p_buffer->start_date;
376 p_new_buffer->end_date = p_buffer->end_date;
377 aout_BufferFree( p_buffer );
378 p_buffer = p_new_buffer;
379 p_input->b_changed = 0;
382 /* If the buffer is too early, wait a while. */
383 mwait( p_buffer->start_date - AOUT_MAX_PREPARE_TIME );
385 if ( aout_InputPlay( p_aout, p_input, p_buffer, i_input_rate ) == -1 )
387 vlc_mutex_unlock( &p_input->lock );
391 vlc_mutex_unlock( &p_input->lock );
393 /* Run the mixer if it is able to run. */
394 vlc_mutex_lock( &p_aout->mixer_lock );
395 aout_MixerRun( p_aout );
396 if( p_input->p_input_thread )
398 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
399 stats_UpdateInteger( p_aout,
400 p_input->p_input_thread->p->counters.p_played_abuffers,
402 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
404 vlc_mutex_unlock( &p_aout->mixer_lock );