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 );
62 if( p_format->i_channels <= 0 )
64 msg_Err( p_aout, "no audio channels" );
68 if( p_format->i_rate > 192000 )
70 msg_Err( p_aout, "excessive audio sample frequency (%u)",
74 if( p_format->i_rate < 4000 )
76 msg_Err( p_aout, "too low audio sample frequency (%u)",
81 /* We can only be called by the decoder, so no need to lock
83 vlc_mutex_lock( &p_aout->mixer_lock );
85 if ( p_aout->i_nb_inputs >= AOUT_MAX_INPUTS )
87 msg_Err( p_aout, "too many inputs already (%d)", p_aout->i_nb_inputs );
91 p_input = malloc(sizeof(aout_input_t));
92 if ( p_input == NULL )
94 memset( p_input, 0, sizeof(aout_input_t) );
96 vlc_mutex_init( &p_input->lock );
98 p_input->b_changed = 0;
101 aout_FormatPrepare( p_format );
103 memcpy( &p_input->input, p_format,
104 sizeof(audio_sample_format_t) );
106 p_input->replay_gain = *p_replay_gain;
108 vlc_mutex_lock( &p_aout->input_fifos_lock );
109 p_aout->pp_inputs[p_aout->i_nb_inputs] = p_input;
110 p_aout->i_nb_inputs++;
112 if ( p_aout->mixer.b_error )
116 var_Destroy( p_aout, "audio-device" );
117 var_Destroy( p_aout, "audio-channels" );
119 /* Recreate the output using the new format. */
120 if ( aout_OutputNew( p_aout, p_format ) < 0 )
122 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
124 vlc_mutex_lock( &p_aout->pp_inputs[i]->lock );
125 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
126 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
128 vlc_mutex_unlock( &p_aout->mixer_lock );
132 /* Create other input streams. */
133 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
135 vlc_mutex_lock( &p_aout->pp_inputs[i]->lock );
136 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
137 aout_InputNew( p_aout, p_aout->pp_inputs[i] );
138 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
143 aout_MixerDelete( p_aout );
146 if ( aout_MixerNew( p_aout ) == -1 )
148 aout_OutputDelete( p_aout );
149 vlc_mutex_unlock( &p_aout->input_fifos_lock );
153 aout_InputNew( p_aout, p_input );
154 vlc_mutex_unlock( &p_aout->input_fifos_lock );
156 vlc_mutex_unlock( &p_aout->mixer_lock );
157 p_input->i_desync = var_CreateGetInteger( p_this, "audio-desync" ) * 1000;
159 p_input_thread = (input_thread_t *)vlc_object_find( p_this,
160 VLC_OBJECT_INPUT, FIND_PARENT );
163 p_input->i_pts_delay = p_input_thread->i_pts_delay;
164 p_input->i_pts_delay += p_input->i_desync;
165 p_input->p_input_thread = p_input_thread;
166 vlc_object_release( p_input_thread );
170 p_input->i_pts_delay = DEFAULT_PTS_DELAY;
171 p_input->i_pts_delay += p_input->i_desync;
172 p_input->p_input_thread = NULL;
178 vlc_mutex_unlock( &p_aout->mixer_lock );
182 aout_input_t * __aout_DecNew( vlc_object_t * p_this,
183 aout_instance_t ** pp_aout,
184 audio_sample_format_t * p_format,
185 audio_replay_gain_t *p_replay_gain )
187 aout_instance_t *p_aout = *pp_aout;
188 if ( p_aout == NULL )
190 msg_Dbg( p_this, "no aout present, spawning one" );
191 p_aout = aout_New( p_this );
193 /* Everything failed, I'm a loser, I just wanna die */
197 vlc_object_attach( p_aout, p_this );
201 return DecNew( p_this, p_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" );
226 vlc_mutex_unlock( &p_aout->mixer_lock );
230 /* Remove the input from the list. */
231 memmove( &p_aout->pp_inputs[i_input], &p_aout->pp_inputs[i_input + 1],
232 (AOUT_MAX_INPUTS - i_input - 1) * sizeof(aout_input_t *) );
233 p_aout->i_nb_inputs--;
235 aout_InputDelete( p_aout, p_input );
237 vlc_mutex_destroy( &p_input->lock );
240 if ( !p_aout->i_nb_inputs )
242 aout_OutputDelete( p_aout );
243 aout_MixerDelete( p_aout );
244 if ( var_Type( p_aout, "audio-device" ) != 0 )
246 var_Destroy( p_aout, "audio-device" );
248 if ( var_Type( p_aout, "audio-channels" ) != 0 )
250 var_Destroy( p_aout, "audio-channels" );
254 vlc_mutex_unlock( &p_aout->mixer_lock );
264 /*****************************************************************************
265 * aout_DecNewBuffer : ask for a new empty buffer
266 *****************************************************************************/
267 aout_buffer_t * aout_DecNewBuffer( 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 );
326 /* This hack for #transcode{acodec=...}:display to work -- Courmisch */
327 if( i_input_rate == 0 )
328 i_input_rate = INPUT_RATE_DEFAULT;
330 if( i_input_rate > INPUT_RATE_DEFAULT * AOUT_MAX_INPUT_RATE ||
331 i_input_rate < INPUT_RATE_DEFAULT / AOUT_MAX_INPUT_RATE )
333 aout_BufferFree( p_buffer );
337 /* Apply the desynchronisation requested by the user */
338 p_buffer->start_date += p_input->i_desync;
339 p_buffer->end_date += p_input->i_desync;
341 if ( p_buffer->start_date > mdate() + p_input->i_pts_delay +
342 AOUT_MAX_ADVANCE_TIME )
344 msg_Warn( p_aout, "received buffer in the future (%"PRId64")",
345 p_buffer->start_date - mdate());
346 if( p_input->p_input_thread )
348 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
349 stats_UpdateInteger( p_aout,
350 p_input->p_input_thread->p->counters.p_lost_abuffers,
352 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
354 aout_BufferFree( p_buffer );
358 p_buffer->end_date = p_buffer->start_date
359 + (mtime_t)p_buffer->i_nb_samples * 1000000
360 / p_input->input.i_rate;
362 vlc_mutex_lock( &p_input->lock );
364 if ( p_input->b_error )
366 vlc_mutex_unlock( &p_input->lock );
367 aout_BufferFree( p_buffer );
371 if ( p_input->b_changed )
373 /* Maybe the allocation size has changed. Re-allocate a buffer. */
374 aout_buffer_t * p_new_buffer;
375 mtime_t duration = (1000000 * (mtime_t)p_buffer->i_nb_samples)
376 / p_input->input.i_rate;
378 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_new_buffer );
379 vlc_memcpy( p_new_buffer->p_buffer, p_buffer->p_buffer,
380 p_buffer->i_nb_bytes );
381 p_new_buffer->i_nb_samples = p_buffer->i_nb_samples;
382 p_new_buffer->i_nb_bytes = p_buffer->i_nb_bytes;
383 p_new_buffer->start_date = p_buffer->start_date;
384 p_new_buffer->end_date = p_buffer->end_date;
385 aout_BufferFree( p_buffer );
386 p_buffer = p_new_buffer;
387 p_input->b_changed = 0;
390 /* If the buffer is too early, wait a while. */
391 mwait( p_buffer->start_date - AOUT_MAX_PREPARE_TIME );
393 if ( aout_InputPlay( p_aout, p_input, p_buffer, i_input_rate ) == -1 )
395 vlc_mutex_unlock( &p_input->lock );
399 vlc_mutex_unlock( &p_input->lock );
401 /* Run the mixer if it is able to run. */
402 vlc_mutex_lock( &p_aout->mixer_lock );
403 aout_MixerRun( p_aout );
404 if( p_input->p_input_thread )
406 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
407 stats_UpdateInteger( p_aout,
408 p_input->p_input_thread->p->counters.p_played_abuffers,
410 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
412 vlc_mutex_unlock( &p_aout->mixer_lock );