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_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 aout_instance_t *p_aout = *pp_aout;
177 if ( p_aout == NULL )
179 msg_Dbg( p_this, "no aout present, spawning one" );
180 p_aout = aout_New( p_this );
182 /* Everything failed, I'm a loser, I just wanna die */
186 vlc_object_attach( p_aout, p_this );
190 return DecNew( p_this, p_aout, p_format, p_replay_gain );
193 /*****************************************************************************
194 * aout_DecDelete : delete a decoder
195 *****************************************************************************/
196 int aout_DecDelete( aout_instance_t * p_aout, aout_input_t * p_input )
200 /* This function can only be called by the decoder itself, so no need
201 * to lock p_input->lock. */
202 vlc_mutex_lock( &p_aout->mixer_lock );
204 for ( i_input = 0; i_input < p_aout->i_nb_inputs; i_input++ )
206 if ( p_aout->pp_inputs[i_input] == p_input )
212 if ( i_input == p_aout->i_nb_inputs )
214 msg_Err( p_aout, "cannot find an input to delete" );
218 /* Remove the input from the list. */
219 memmove( &p_aout->pp_inputs[i_input], &p_aout->pp_inputs[i_input + 1],
220 (AOUT_MAX_INPUTS - i_input - 1) * sizeof(aout_input_t *) );
221 p_aout->i_nb_inputs--;
223 aout_InputDelete( p_aout, p_input );
225 vlc_mutex_destroy( &p_input->lock );
228 if ( !p_aout->i_nb_inputs )
230 aout_OutputDelete( p_aout );
231 aout_MixerDelete( p_aout );
232 if ( var_Type( p_aout, "audio-device" ) != 0 )
234 var_Destroy( p_aout, "audio-device" );
236 if ( var_Type( p_aout, "audio-channels" ) != 0 )
238 var_Destroy( p_aout, "audio-channels" );
242 vlc_mutex_unlock( &p_aout->mixer_lock );
252 /*****************************************************************************
253 * aout_DecNewBuffer : ask for a new empty buffer
254 *****************************************************************************/
255 aout_buffer_t * aout_DecNewBuffer( aout_input_t * p_input,
256 size_t i_nb_samples )
258 aout_buffer_t * p_buffer;
261 vlc_mutex_lock( &p_input->lock );
263 if ( p_input->b_error )
265 vlc_mutex_unlock( &p_input->lock );
269 duration = (1000000 * (mtime_t)i_nb_samples) / p_input->input.i_rate;
271 /* This necessarily allocates in the heap. */
272 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_buffer );
273 if( p_buffer != NULL )
274 p_buffer->i_nb_bytes = i_nb_samples * p_input->input.i_bytes_per_frame
275 / p_input->input.i_frame_length;
277 /* Suppose the decoder doesn't have more than one buffered buffer */
278 p_input->b_changed = 0;
280 vlc_mutex_unlock( &p_input->lock );
282 if( p_buffer == NULL )
285 p_buffer->i_nb_samples = i_nb_samples;
286 p_buffer->start_date = p_buffer->end_date = 0;
290 /*****************************************************************************
291 * aout_DecDeleteBuffer : destroy an undecoded buffer
292 *****************************************************************************/
293 void aout_DecDeleteBuffer( aout_instance_t * p_aout, aout_input_t * p_input,
294 aout_buffer_t * p_buffer )
296 (void)p_aout; (void)p_input;
297 aout_BufferFree( p_buffer );
300 /*****************************************************************************
301 * aout_DecPlay : filter & mix the decoded buffer
302 *****************************************************************************/
303 int aout_DecPlay( aout_instance_t * p_aout, aout_input_t * p_input,
304 aout_buffer_t * p_buffer, int i_input_rate )
306 if ( p_buffer->start_date == 0 )
308 msg_Warn( p_aout, "non-dated buffer received" );
309 aout_BufferFree( p_buffer );
313 if( i_input_rate > INPUT_RATE_DEFAULT * AOUT_MAX_INPUT_RATE ||
314 i_input_rate < INPUT_RATE_DEFAULT / AOUT_MAX_INPUT_RATE )
316 aout_BufferFree( p_buffer );
320 /* Apply the desynchronisation requested by the user */
321 p_buffer->start_date += p_input->i_desync;
322 p_buffer->end_date += p_input->i_desync;
324 if ( p_buffer->start_date > mdate() + p_input->i_pts_delay +
325 AOUT_MAX_ADVANCE_TIME )
327 msg_Warn( p_aout, "received buffer in the future (%"PRId64")",
328 p_buffer->start_date - mdate());
329 if( p_input->p_input_thread )
331 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
332 stats_UpdateInteger( p_aout,
333 p_input->p_input_thread->p->counters.p_lost_abuffers,
335 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
337 aout_BufferFree( p_buffer );
341 p_buffer->end_date = p_buffer->start_date
342 + (mtime_t)p_buffer->i_nb_samples * 1000000
343 / p_input->input.i_rate;
345 vlc_mutex_lock( &p_input->lock );
347 if ( p_input->b_error )
349 vlc_mutex_unlock( &p_input->lock );
350 aout_BufferFree( p_buffer );
354 if ( p_input->b_changed )
356 /* Maybe the allocation size has changed. Re-allocate a buffer. */
357 aout_buffer_t * p_new_buffer;
358 mtime_t duration = (1000000 * (mtime_t)p_buffer->i_nb_samples)
359 / p_input->input.i_rate;
361 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_new_buffer );
362 vlc_memcpy( p_new_buffer->p_buffer, p_buffer->p_buffer,
363 p_buffer->i_nb_bytes );
364 p_new_buffer->i_nb_samples = p_buffer->i_nb_samples;
365 p_new_buffer->i_nb_bytes = p_buffer->i_nb_bytes;
366 p_new_buffer->start_date = p_buffer->start_date;
367 p_new_buffer->end_date = p_buffer->end_date;
368 aout_BufferFree( p_buffer );
369 p_buffer = p_new_buffer;
370 p_input->b_changed = 0;
373 /* If the buffer is too early, wait a while. */
374 mwait( p_buffer->start_date - AOUT_MAX_PREPARE_TIME );
376 if ( aout_InputPlay( p_aout, p_input, p_buffer, i_input_rate ) == -1 )
378 vlc_mutex_unlock( &p_input->lock );
382 vlc_mutex_unlock( &p_input->lock );
384 /* Run the mixer if it is able to run. */
385 vlc_mutex_lock( &p_aout->mixer_lock );
386 aout_MixerRun( p_aout );
387 if( p_input->p_input_thread )
389 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
390 stats_UpdateInteger( p_aout,
391 p_input->p_input_thread->p->counters.p_played_abuffers,
393 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
395 vlc_mutex_unlock( &p_aout->mixer_lock );