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;
51 /* Sanitize audio format */
52 if( p_format->i_channels > 32 )
54 msg_Err( p_aout, "too many audio channels (%u)",
55 p_format->i_channels );
59 if( p_format->i_rate > 192000 )
61 msg_Err( p_aout, "excessive audio sample frequency (%u)",
66 /* We can only be called by the decoder, so no need to lock
68 vlc_mutex_lock( &p_aout->mixer_lock );
70 if ( p_aout->i_nb_inputs >= AOUT_MAX_INPUTS )
72 msg_Err( p_aout, "too many inputs already (%d)", p_aout->i_nb_inputs );
76 p_input = malloc(sizeof(aout_input_t));
77 if ( p_input == NULL )
79 msg_Err( p_aout, "out of memory" );
82 memset( p_input, 0, sizeof(aout_input_t) );
84 vlc_mutex_init( p_aout, &p_input->lock );
86 p_input->b_changed = 0;
89 aout_FormatPrepare( p_format );
91 memcpy( &p_input->input, p_format,
92 sizeof(audio_sample_format_t) );
94 p_input->replay_gain = *p_replay_gain;
96 p_aout->pp_inputs[p_aout->i_nb_inputs] = p_input;
97 p_aout->i_nb_inputs++;
99 if ( p_aout->mixer.b_error )
103 var_Destroy( p_aout, "audio-device" );
104 var_Destroy( p_aout, "audio-channels" );
106 /* Recreate the output using the new format. */
107 if ( aout_OutputNew( p_aout, p_format ) < 0 )
109 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
111 vlc_mutex_lock( &p_aout->pp_inputs[i]->lock );
112 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
113 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
115 vlc_mutex_unlock( &p_aout->mixer_lock );
119 /* Create other input streams. */
120 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
122 vlc_mutex_lock( &p_aout->pp_inputs[i]->lock );
123 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
124 aout_InputNew( p_aout, p_aout->pp_inputs[i] );
125 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
130 aout_MixerDelete( p_aout );
133 if ( aout_MixerNew( p_aout ) == -1 )
135 aout_OutputDelete( p_aout );
139 aout_InputNew( p_aout, p_input );
141 vlc_mutex_unlock( &p_aout->mixer_lock );
142 p_input->i_desync = var_CreateGetInteger( p_this, "audio-desync" ) * 1000;
144 p_input_thread = (input_thread_t *)vlc_object_find( p_this,
145 VLC_OBJECT_INPUT, FIND_PARENT );
148 p_input->i_pts_delay = p_input_thread->i_pts_delay;
149 p_input->i_pts_delay += p_input->i_desync;
150 p_input->p_input_thread = p_input_thread;
151 vlc_object_release( p_input_thread );
155 p_input->i_pts_delay = DEFAULT_PTS_DELAY;
156 p_input->i_pts_delay += p_input->i_desync;
157 p_input->p_input_thread = NULL;
163 vlc_mutex_unlock( &p_aout->mixer_lock );
167 aout_input_t * __aout_DecNew( vlc_object_t * p_this,
168 aout_instance_t ** pp_aout,
169 audio_sample_format_t * p_format,
170 audio_replay_gain_t *p_replay_gain )
172 if ( *pp_aout == NULL )
174 /* Create an audio output if there is none. */
175 *pp_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT, FIND_ANYWHERE );
177 if( *pp_aout == NULL )
179 msg_Dbg( p_this, "no aout present, spawning one" );
181 *pp_aout = aout_New( p_this );
182 /* Everything failed, I'm a loser, I just wanna die */
183 if( *pp_aout == NULL )
187 vlc_object_attach( *pp_aout, p_this->p_libvlc );
191 vlc_object_release( *pp_aout );
195 return DecNew( p_this, *pp_aout, p_format, p_replay_gain );
198 /*****************************************************************************
199 * aout_DecDelete : delete a decoder
200 *****************************************************************************/
201 int aout_DecDelete( aout_instance_t * p_aout, aout_input_t * p_input )
205 /* This function can only be called by the decoder itself, so no need
206 * to lock p_input->lock. */
207 vlc_mutex_lock( &p_aout->mixer_lock );
209 for ( i_input = 0; i_input < p_aout->i_nb_inputs; i_input++ )
211 if ( p_aout->pp_inputs[i_input] == p_input )
217 if ( i_input == p_aout->i_nb_inputs )
219 msg_Err( p_aout, "cannot find an input to delete" );
223 /* Remove the input from the list. */
224 memmove( &p_aout->pp_inputs[i_input], &p_aout->pp_inputs[i_input + 1],
225 (AOUT_MAX_INPUTS - i_input - 1) * sizeof(aout_input_t *) );
226 p_aout->i_nb_inputs--;
228 aout_InputDelete( p_aout, p_input );
230 vlc_mutex_destroy( &p_input->lock );
233 if ( !p_aout->i_nb_inputs )
235 aout_OutputDelete( p_aout );
236 aout_MixerDelete( p_aout );
237 if ( var_Type( p_aout, "audio-device" ) != 0 )
239 var_Destroy( p_aout, "audio-device" );
241 if ( var_Type( p_aout, "audio-channels" ) != 0 )
243 var_Destroy( p_aout, "audio-channels" );
247 vlc_mutex_unlock( &p_aout->mixer_lock );
257 /*****************************************************************************
258 * aout_DecNewBuffer : ask for a new empty buffer
259 *****************************************************************************/
260 aout_buffer_t * aout_DecNewBuffer( aout_instance_t * p_aout,
261 aout_input_t * p_input,
262 size_t i_nb_samples )
264 aout_buffer_t * p_buffer;
267 vlc_mutex_lock( &p_input->lock );
269 if ( p_input->b_error )
271 vlc_mutex_unlock( &p_input->lock );
275 duration = (1000000 * (mtime_t)i_nb_samples) / p_input->input.i_rate;
277 /* This necessarily allocates in the heap. */
278 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_buffer );
279 if( p_buffer != NULL )
280 p_buffer->i_nb_bytes = i_nb_samples * p_input->input.i_bytes_per_frame
281 / p_input->input.i_frame_length;
283 /* Suppose the decoder doesn't have more than one buffered buffer */
284 p_input->b_changed = 0;
286 vlc_mutex_unlock( &p_input->lock );
288 if( p_buffer == NULL )
291 p_buffer->i_nb_samples = i_nb_samples;
292 p_buffer->start_date = p_buffer->end_date = 0;
296 /*****************************************************************************
297 * aout_DecDeleteBuffer : destroy an undecoded buffer
298 *****************************************************************************/
299 void aout_DecDeleteBuffer( aout_instance_t * p_aout, aout_input_t * p_input,
300 aout_buffer_t * p_buffer )
302 (void)p_aout; (void)p_input;
303 aout_BufferFree( p_buffer );
306 /*****************************************************************************
307 * aout_DecPlay : filter & mix the decoded buffer
308 *****************************************************************************/
309 int aout_DecPlay( aout_instance_t * p_aout, aout_input_t * p_input,
310 aout_buffer_t * p_buffer, int i_input_rate )
312 if ( p_buffer->start_date == 0 )
314 msg_Warn( p_aout, "non-dated buffer received" );
315 aout_BufferFree( p_buffer );
319 if( i_input_rate > INPUT_RATE_DEFAULT * AOUT_MAX_INPUT_RATE ||
320 i_input_rate < INPUT_RATE_DEFAULT / AOUT_MAX_INPUT_RATE )
322 aout_BufferFree( p_buffer );
326 /* Apply the desynchronisation requested by the user */
327 p_buffer->start_date += p_input->i_desync;
328 p_buffer->end_date += p_input->i_desync;
330 if ( p_buffer->start_date > mdate() + p_input->i_pts_delay +
331 AOUT_MAX_ADVANCE_TIME )
333 msg_Warn( p_aout, "received buffer in the future ("I64Fd")",
334 p_buffer->start_date - mdate());
335 if( p_input->p_input_thread )
337 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
338 stats_UpdateInteger( p_aout,
339 p_input->p_input_thread->p->counters.p_lost_abuffers,
341 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
343 aout_BufferFree( p_buffer );
347 p_buffer->end_date = p_buffer->start_date
348 + (mtime_t)p_buffer->i_nb_samples * 1000000
349 / p_input->input.i_rate;
351 vlc_mutex_lock( &p_input->lock );
353 if ( p_input->b_error )
355 vlc_mutex_unlock( &p_input->lock );
356 aout_BufferFree( p_buffer );
360 if ( p_input->b_changed )
362 /* Maybe the allocation size has changed. Re-allocate a buffer. */
363 aout_buffer_t * p_new_buffer;
364 mtime_t duration = (1000000 * (mtime_t)p_buffer->i_nb_samples)
365 / p_input->input.i_rate;
367 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_new_buffer );
368 p_aout->p_libvlc->pf_memcpy( p_new_buffer->p_buffer, p_buffer->p_buffer,
369 p_buffer->i_nb_bytes );
370 p_new_buffer->i_nb_samples = p_buffer->i_nb_samples;
371 p_new_buffer->i_nb_bytes = p_buffer->i_nb_bytes;
372 p_new_buffer->start_date = p_buffer->start_date;
373 p_new_buffer->end_date = p_buffer->end_date;
374 aout_BufferFree( p_buffer );
375 p_buffer = p_new_buffer;
376 p_input->b_changed = 0;
379 /* If the buffer is too early, wait a while. */
380 mwait( p_buffer->start_date - AOUT_MAX_PREPARE_TIME );
382 if ( aout_InputPlay( p_aout, p_input, p_buffer, i_input_rate ) == -1 )
384 vlc_mutex_unlock( &p_input->lock );
388 vlc_mutex_unlock( &p_input->lock );
390 /* Run the mixer if it is able to run. */
391 vlc_mutex_lock( &p_aout->mixer_lock );
392 aout_MixerRun( p_aout );
393 if( p_input->p_input_thread )
395 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
396 stats_UpdateInteger( p_aout,
397 p_input->p_input_thread->p->counters.p_played_abuffers,
399 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
401 vlc_mutex_unlock( &p_aout->mixer_lock );