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;
52 /* Sanitize audio format */
53 if( p_format->i_channels > 32 )
55 msg_Err( p_aout, "too many audio channels (%u)",
56 p_format->i_channels );
60 if( p_format->i_rate > 192000 )
62 msg_Err( p_aout, "excessive audio sample frequency (%u)",
67 /* We can only be called by the decoder, so no need to lock
69 vlc_mutex_lock( &p_aout->mixer_lock );
71 if ( p_aout->i_nb_inputs >= AOUT_MAX_INPUTS )
73 msg_Err( p_aout, "too many inputs already (%d)", p_aout->i_nb_inputs );
77 p_input = malloc(sizeof(aout_input_t));
78 if ( p_input == NULL )
80 msg_Err( p_aout, "out of memory" );
83 memset( p_input, 0, sizeof(aout_input_t) );
85 vlc_mutex_init( p_aout, &p_input->lock );
87 p_input->b_changed = 0;
89 aout_FormatPrepare( p_format );
90 memcpy( &p_input->input, p_format,
91 sizeof(audio_sample_format_t) );
93 p_input->replay_gain = *p_replay_gain;
95 p_aout->pp_inputs[p_aout->i_nb_inputs] = p_input;
96 p_aout->i_nb_inputs++;
98 if ( p_aout->mixer.b_error )
102 var_Destroy( p_aout, "audio-device" );
103 var_Destroy( p_aout, "audio-channels" );
105 /* Recreate the output using the new format. */
106 if ( aout_OutputNew( p_aout, p_format ) < 0 )
108 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
110 vlc_mutex_lock( &p_aout->pp_inputs[i]->lock );
111 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
112 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
114 vlc_mutex_unlock( &p_aout->mixer_lock );
118 /* Create other input streams. */
119 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
121 vlc_mutex_lock( &p_aout->pp_inputs[i]->lock );
122 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
123 aout_InputNew( p_aout, p_aout->pp_inputs[i] );
124 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
129 aout_MixerDelete( p_aout );
132 if ( aout_MixerNew( p_aout ) == -1 )
134 aout_OutputDelete( p_aout );
138 aout_InputNew( p_aout, p_input );
140 vlc_mutex_unlock( &p_aout->mixer_lock );
141 var_Create( p_this, "audio-desync", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
142 var_Get( p_this, "audio-desync", &val );
143 p_input->i_desync = val.i_int * 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 if ( *pp_aout == NULL )
175 /* Create an audio output if there is none. */
176 *pp_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT, FIND_ANYWHERE );
178 if( *pp_aout == NULL )
180 msg_Dbg( p_this, "no aout present, spawning one" );
182 *pp_aout = aout_New( p_this );
183 /* Everything failed, I'm a loser, I just wanna die */
184 if( *pp_aout == NULL )
188 vlc_object_attach( *pp_aout, p_this->p_libvlc );
192 vlc_object_release( *pp_aout );
196 return DecNew( p_this, *pp_aout, p_format, p_replay_gain );
199 /*****************************************************************************
200 * aout_DecDelete : delete a decoder
201 *****************************************************************************/
202 int aout_DecDelete( aout_instance_t * p_aout, aout_input_t * p_input )
206 /* This function can only be called by the decoder itself, so no need
207 * to lock p_input->lock. */
208 vlc_mutex_lock( &p_aout->mixer_lock );
210 for ( i_input = 0; i_input < p_aout->i_nb_inputs; i_input++ )
212 if ( p_aout->pp_inputs[i_input] == p_input )
218 if ( i_input == p_aout->i_nb_inputs )
220 msg_Err( p_aout, "cannot find an input to delete" );
224 /* Remove the input from the list. */
225 memmove( &p_aout->pp_inputs[i_input], &p_aout->pp_inputs[i_input + 1],
226 (AOUT_MAX_INPUTS - i_input - 1) * sizeof(aout_input_t *) );
227 p_aout->i_nb_inputs--;
229 aout_InputDelete( p_aout, p_input );
231 vlc_mutex_destroy( &p_input->lock );
234 if ( !p_aout->i_nb_inputs )
236 aout_OutputDelete( p_aout );
237 aout_MixerDelete( p_aout );
238 if ( var_Type( p_aout, "audio-device" ) != 0 )
240 var_Destroy( p_aout, "audio-device" );
242 if ( var_Type( p_aout, "audio-channels" ) != 0 )
244 var_Destroy( p_aout, "audio-channels" );
248 vlc_mutex_unlock( &p_aout->mixer_lock );
258 /*****************************************************************************
259 * aout_DecNewBuffer : ask for a new empty buffer
260 *****************************************************************************/
261 aout_buffer_t * aout_DecNewBuffer( aout_instance_t * p_aout,
262 aout_input_t * p_input,
263 size_t i_nb_samples )
265 aout_buffer_t * p_buffer;
268 vlc_mutex_lock( &p_input->lock );
270 if ( p_input->b_error )
272 vlc_mutex_unlock( &p_input->lock );
276 duration = (1000000 * (mtime_t)i_nb_samples) / p_input->input.i_rate;
278 /* This necessarily allocates in the heap. */
279 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_buffer );
280 if( p_buffer != NULL )
281 p_buffer->i_nb_bytes = i_nb_samples * p_input->input.i_bytes_per_frame
282 / p_input->input.i_frame_length;
284 /* Suppose the decoder doesn't have more than one buffered buffer */
285 p_input->b_changed = 0;
287 vlc_mutex_unlock( &p_input->lock );
289 if( p_buffer == NULL )
292 p_buffer->i_nb_samples = i_nb_samples;
293 p_buffer->start_date = p_buffer->end_date = 0;
297 /*****************************************************************************
298 * aout_DecDeleteBuffer : destroy an undecoded buffer
299 *****************************************************************************/
300 void aout_DecDeleteBuffer( aout_instance_t * p_aout, aout_input_t * p_input,
301 aout_buffer_t * p_buffer )
303 (void)p_aout; (void)p_input;
304 aout_BufferFree( p_buffer );
307 /*****************************************************************************
308 * aout_DecPlay : filter & mix the decoded buffer
309 *****************************************************************************/
310 int aout_DecPlay( aout_instance_t * p_aout, aout_input_t * p_input,
311 aout_buffer_t * p_buffer, int i_input_rate )
313 if ( p_buffer->start_date == 0 )
315 msg_Warn( p_aout, "non-dated buffer received" );
316 aout_BufferFree( p_buffer );
320 if( i_input_rate > INPUT_RATE_DEFAULT * AOUT_MAX_INPUT_RATE ||
321 i_input_rate < INPUT_RATE_DEFAULT / AOUT_MAX_INPUT_RATE )
323 aout_BufferFree( p_buffer );
327 /* Apply the desynchronisation requested by the user */
328 p_buffer->start_date += p_input->i_desync;
329 p_buffer->end_date += p_input->i_desync;
331 if ( p_buffer->start_date > mdate() + p_input->i_pts_delay +
332 AOUT_MAX_ADVANCE_TIME )
334 msg_Warn( p_aout, "received buffer in the future ("I64Fd")",
335 p_buffer->start_date - mdate());
336 if( p_input->p_input_thread )
338 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
339 stats_UpdateInteger( p_aout,
340 p_input->p_input_thread->p->counters.p_lost_abuffers,
342 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
344 aout_BufferFree( p_buffer );
348 p_buffer->end_date = p_buffer->start_date
349 + (mtime_t)p_buffer->i_nb_samples * 1000000
350 / p_input->input.i_rate;
352 vlc_mutex_lock( &p_input->lock );
354 if ( p_input->b_error )
356 vlc_mutex_unlock( &p_input->lock );
357 aout_BufferFree( p_buffer );
361 if ( p_input->b_changed )
363 /* Maybe the allocation size has changed. Re-allocate a buffer. */
364 aout_buffer_t * p_new_buffer;
365 mtime_t duration = (1000000 * (mtime_t)p_buffer->i_nb_samples)
366 / p_input->input.i_rate;
368 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_new_buffer );
369 p_aout->p_libvlc->pf_memcpy( p_new_buffer->p_buffer, p_buffer->p_buffer,
370 p_buffer->i_nb_bytes );
371 p_new_buffer->i_nb_samples = p_buffer->i_nb_samples;
372 p_new_buffer->i_nb_bytes = p_buffer->i_nb_bytes;
373 p_new_buffer->start_date = p_buffer->start_date;
374 p_new_buffer->end_date = p_buffer->end_date;
375 aout_BufferFree( p_buffer );
376 p_buffer = p_new_buffer;
377 p_input->b_changed = 0;
380 /* If the buffer is too early, wait a while. */
381 mwait( p_buffer->start_date - AOUT_MAX_PREPARE_TIME );
383 if ( aout_InputPlay( p_aout, p_input, p_buffer, i_input_rate ) == -1 )
385 vlc_mutex_unlock( &p_input->lock );
389 vlc_mutex_unlock( &p_input->lock );
391 /* Run the mixer if it is able to run. */
392 vlc_mutex_lock( &p_aout->mixer_lock );
393 aout_MixerRun( p_aout );
394 if( p_input->p_input_thread )
396 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
397 stats_UpdateInteger( p_aout,
398 p_input->p_input_thread->p->counters.p_played_abuffers,
400 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
402 vlc_mutex_unlock( &p_aout->mixer_lock );