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 aout_lock_mixer( p_aout );
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 aout_lock_input_fifos( p_aout );
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 aout_lock_input( p_aout, p_aout->pp_inputs[i] );
125 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
126 aout_unlock_input( p_aout, p_aout->pp_inputs[i] );
128 aout_unlock_input_fifos( p_aout );
129 aout_unlock_mixer( p_aout );
133 /* Create other input streams. */
134 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
136 aout_lock_input( p_aout, p_aout->pp_inputs[i] );
137 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
138 aout_InputNew( p_aout, p_aout->pp_inputs[i] );
139 aout_unlock_input( p_aout, p_aout->pp_inputs[i] );
144 aout_MixerDelete( p_aout );
147 if ( aout_MixerNew( p_aout ) == -1 )
149 aout_OutputDelete( p_aout );
150 aout_unlock_input_fifos( p_aout );
154 aout_InputNew( p_aout, p_input );
155 aout_unlock_input_fifos( p_aout );
157 aout_unlock_mixer( p_aout );
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->p_input_thread = p_input_thread;
165 vlc_object_release( p_input_thread );
169 p_input->i_pts_delay = DEFAULT_PTS_DELAY;
170 p_input->p_input_thread = NULL;
176 aout_unlock_mixer( p_aout );
180 aout_input_t * __aout_DecNew( vlc_object_t * p_this,
181 aout_instance_t ** pp_aout,
182 audio_sample_format_t * p_format,
183 audio_replay_gain_t *p_replay_gain )
185 aout_instance_t *p_aout = *pp_aout;
186 if ( p_aout == NULL )
188 msg_Dbg( p_this, "no aout present, spawning one" );
189 p_aout = aout_New( p_this );
191 /* Everything failed, I'm a loser, I just wanna die */
195 vlc_object_attach( p_aout, p_this );
199 return DecNew( p_this, p_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 aout_lock_mixer( p_aout );
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" );
224 aout_unlock_mixer( p_aout );
228 /* Remove the input from the list. */
229 memmove( &p_aout->pp_inputs[i_input], &p_aout->pp_inputs[i_input + 1],
230 (AOUT_MAX_INPUTS - i_input - 1) * sizeof(aout_input_t *) );
231 p_aout->i_nb_inputs--;
233 aout_InputDelete( p_aout, p_input );
235 vlc_mutex_destroy( &p_input->lock );
238 if ( !p_aout->i_nb_inputs )
240 aout_OutputDelete( p_aout );
241 aout_MixerDelete( p_aout );
242 if ( var_Type( p_aout, "audio-device" ) != 0 )
244 var_Destroy( p_aout, "audio-device" );
246 if ( var_Type( p_aout, "audio-channels" ) != 0 )
248 var_Destroy( p_aout, "audio-channels" );
252 aout_unlock_mixer( p_aout );
262 /*****************************************************************************
263 * aout_DecNewBuffer : ask for a new empty buffer
264 *****************************************************************************/
265 aout_buffer_t * aout_DecNewBuffer( aout_input_t * p_input,
266 size_t i_nb_samples )
268 aout_buffer_t * p_buffer;
271 aout_lock_input( NULL, p_input );
273 if ( p_input->b_error )
275 aout_unlock_input( NULL, p_input );
279 duration = (1000000 * (mtime_t)i_nb_samples) / p_input->input.i_rate;
281 /* This necessarily allocates in the heap. */
282 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_buffer );
283 if( p_buffer != NULL )
284 p_buffer->i_nb_bytes = i_nb_samples * p_input->input.i_bytes_per_frame
285 / p_input->input.i_frame_length;
287 /* Suppose the decoder doesn't have more than one buffered buffer */
288 p_input->b_changed = 0;
290 aout_unlock_input( NULL, p_input );
292 if( p_buffer == NULL )
295 p_buffer->i_nb_samples = i_nb_samples;
296 p_buffer->start_date = p_buffer->end_date = 0;
300 /*****************************************************************************
301 * aout_DecDeleteBuffer : destroy an undecoded buffer
302 *****************************************************************************/
303 void aout_DecDeleteBuffer( aout_instance_t * p_aout, aout_input_t * p_input,
304 aout_buffer_t * p_buffer )
306 (void)p_aout; (void)p_input;
307 aout_BufferFree( p_buffer );
310 /*****************************************************************************
311 * aout_DecPlay : filter & mix the decoded buffer
312 *****************************************************************************/
313 int aout_DecPlay( aout_instance_t * p_aout, aout_input_t * p_input,
314 aout_buffer_t * p_buffer, int i_input_rate )
316 if ( p_buffer->start_date == 0 )
318 msg_Warn( p_aout, "non-dated buffer received" );
319 aout_BufferFree( p_buffer );
324 /* This hack for #transcode{acodec=...}:display to work -- Courmisch */
325 if( i_input_rate == 0 )
326 i_input_rate = INPUT_RATE_DEFAULT;
328 if( i_input_rate > INPUT_RATE_DEFAULT * AOUT_MAX_INPUT_RATE ||
329 i_input_rate < INPUT_RATE_DEFAULT / AOUT_MAX_INPUT_RATE )
331 aout_BufferFree( p_buffer );
335 if ( p_buffer->start_date > mdate() + p_input->i_pts_delay +
336 AOUT_MAX_ADVANCE_TIME )
338 msg_Warn( p_aout, "received buffer in the future (%"PRId64")",
339 p_buffer->start_date - mdate());
340 if( p_input->p_input_thread )
342 vlc_mutex_lock( &p_input->p_input_thread->p->counters.counters_lock);
343 stats_UpdateInteger( p_aout,
344 p_input->p_input_thread->p->counters.p_lost_abuffers,
346 vlc_mutex_unlock( &p_input->p_input_thread->p->counters.counters_lock);
348 aout_BufferFree( p_buffer );
352 p_buffer->end_date = p_buffer->start_date
353 + (mtime_t)p_buffer->i_nb_samples * 1000000
354 / p_input->input.i_rate;
356 aout_lock_input( p_aout, p_input );
358 if ( p_input->b_error )
360 aout_unlock_input( p_aout, p_input );
361 aout_BufferFree( p_buffer );
365 if ( p_input->b_changed )
367 /* Maybe the allocation size has changed. Re-allocate a buffer. */
368 aout_buffer_t * p_new_buffer;
369 mtime_t duration = (1000000 * (mtime_t)p_buffer->i_nb_samples)
370 / p_input->input.i_rate;
372 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_new_buffer );
373 vlc_memcpy( p_new_buffer->p_buffer, p_buffer->p_buffer,
374 p_buffer->i_nb_bytes );
375 p_new_buffer->i_nb_samples = p_buffer->i_nb_samples;
376 p_new_buffer->i_nb_bytes = p_buffer->i_nb_bytes;
377 p_new_buffer->start_date = p_buffer->start_date;
378 p_new_buffer->end_date = p_buffer->end_date;
379 aout_BufferFree( p_buffer );
380 p_buffer = p_new_buffer;
381 p_input->b_changed = 0;
384 /* If the buffer is too early, wait a while. */
385 mwait( p_buffer->start_date - AOUT_MAX_PREPARE_TIME );
387 int ret = aout_InputPlay( p_aout, p_input, p_buffer, i_input_rate );
389 aout_unlock_input( p_aout, p_input );
391 if ( ret == -1 ) return -1;
393 /* Run the mixer if it is able to run. */
394 aout_lock_mixer( p_aout );
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 aout_unlock_mixer( p_aout );