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 /*****************************************************************************
43 * aout_DecNew : create a decoder
44 *****************************************************************************/
45 static aout_input_t * DecNew( vlc_object_t * p_this, aout_instance_t * p_aout,
46 audio_sample_format_t *p_format,
47 const audio_replay_gain_t *p_replay_gain,
48 const aout_request_vout_t *p_request_vout )
50 aout_input_t * p_input;
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 );
59 if( p_format->i_channels <= 0 )
61 msg_Err( p_aout, "no audio channels" );
65 if( p_format->i_rate > 192000 )
67 msg_Err( p_aout, "excessive audio sample frequency (%u)",
71 if( p_format->i_rate < 4000 )
73 msg_Err( p_aout, "too low audio sample frequency (%u)",
78 /* We can only be called by the decoder, so no need to lock
80 aout_lock_mixer( p_aout );
82 if ( p_aout->i_nb_inputs >= AOUT_MAX_INPUTS )
84 msg_Err( p_aout, "too many inputs already (%d)", p_aout->i_nb_inputs );
88 p_input = calloc( 1, sizeof(aout_input_t));
92 vlc_mutex_init( &p_input->lock );
94 p_input->b_changed = false;
95 p_input->b_error = true;
96 p_input->b_paused = false;
97 p_input->i_pause_date = 0;
99 aout_FormatPrepare( p_format );
101 memcpy( &p_input->input, p_format,
102 sizeof(audio_sample_format_t) );
104 p_input->replay_gain = *p_replay_gain;
106 aout_lock_input_fifos( p_aout );
107 p_aout->pp_inputs[p_aout->i_nb_inputs] = p_input;
108 p_aout->i_nb_inputs++;
110 if ( p_aout->mixer.b_error )
114 var_Destroy( p_aout, "audio-device" );
115 var_Destroy( p_aout, "audio-channels" );
117 /* Recreate the output using the new format. */
118 if ( aout_OutputNew( p_aout, p_format ) < 0 )
120 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
122 aout_lock_input( p_aout, p_aout->pp_inputs[i] );
123 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
124 aout_unlock_input( p_aout, p_aout->pp_inputs[i] );
126 aout_unlock_input_fifos( p_aout );
127 aout_unlock_mixer( p_aout );
131 /* Create other input streams. */
132 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
134 aout_input_t *p_input = p_aout->pp_inputs[i];
136 aout_lock_input( p_aout, p_input );
137 aout_InputDelete( p_aout, p_input );
138 aout_InputNew( p_aout, p_input, &p_input->request_vout );
139 aout_unlock_input( p_aout, p_input );
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, p_request_vout );
155 aout_unlock_input_fifos( p_aout );
157 aout_unlock_mixer( p_aout );
162 aout_unlock_mixer( p_aout );
166 aout_input_t * __aout_DecNew( vlc_object_t * p_this,
167 aout_instance_t ** pp_aout,
168 audio_sample_format_t * p_format,
169 const audio_replay_gain_t *p_replay_gain,
170 const aout_request_vout_t *p_request_video )
172 aout_instance_t *p_aout = *pp_aout;
173 if ( p_aout == NULL )
175 msg_Dbg( p_this, "no aout present, spawning one" );
176 p_aout = aout_New( p_this );
178 /* Everything failed, I'm a loser, I just wanna die */
182 vlc_object_attach( p_aout, p_this );
186 return DecNew( p_this, p_aout, p_format, p_replay_gain, p_request_video );
189 /*****************************************************************************
190 * aout_DecDelete : delete a decoder
191 *****************************************************************************/
192 int aout_DecDelete( aout_instance_t * p_aout, aout_input_t * p_input )
196 /* This function can only be called by the decoder itself, so no need
197 * to lock p_input->lock. */
198 aout_lock_mixer( p_aout );
200 for ( i_input = 0; i_input < p_aout->i_nb_inputs; i_input++ )
202 if ( p_aout->pp_inputs[i_input] == p_input )
208 if ( i_input == p_aout->i_nb_inputs )
210 msg_Err( p_aout, "cannot find an input to delete" );
211 aout_unlock_mixer( p_aout );
215 /* Remove the input from the list. */
216 memmove( &p_aout->pp_inputs[i_input], &p_aout->pp_inputs[i_input + 1],
217 (AOUT_MAX_INPUTS - i_input - 1) * sizeof(aout_input_t *) );
218 p_aout->i_nb_inputs--;
220 aout_InputDelete( p_aout, p_input );
222 vlc_mutex_destroy( &p_input->lock );
225 if ( !p_aout->i_nb_inputs )
227 aout_OutputDelete( p_aout );
228 aout_MixerDelete( p_aout );
229 if ( var_Type( p_aout, "audio-device" ) != 0 )
231 var_Destroy( p_aout, "audio-device" );
233 if ( var_Type( p_aout, "audio-channels" ) != 0 )
235 var_Destroy( p_aout, "audio-channels" );
239 aout_unlock_mixer( p_aout );
249 /*****************************************************************************
250 * aout_DecNewBuffer : ask for a new empty buffer
251 *****************************************************************************/
252 aout_buffer_t * aout_DecNewBuffer( aout_input_t * p_input,
253 size_t i_nb_samples )
255 aout_buffer_t * p_buffer;
258 aout_lock_input( NULL, p_input );
260 if ( p_input->b_error )
262 aout_unlock_input( NULL, p_input );
266 duration = (1000000 * (mtime_t)i_nb_samples) / p_input->input.i_rate;
268 /* This necessarily allocates in the heap. */
269 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_buffer );
270 if( p_buffer != NULL )
271 p_buffer->i_nb_bytes = i_nb_samples * p_input->input.i_bytes_per_frame
272 / p_input->input.i_frame_length;
274 /* Suppose the decoder doesn't have more than one buffered buffer */
275 p_input->b_changed = false;
277 aout_unlock_input( NULL, p_input );
279 if( p_buffer == NULL )
282 p_buffer->i_nb_samples = i_nb_samples;
283 p_buffer->start_date = p_buffer->end_date = 0;
287 /*****************************************************************************
288 * aout_DecDeleteBuffer : destroy an undecoded buffer
289 *****************************************************************************/
290 void aout_DecDeleteBuffer( aout_instance_t * p_aout, aout_input_t * p_input,
291 aout_buffer_t * p_buffer )
293 (void)p_aout; (void)p_input;
294 aout_BufferFree( p_buffer );
297 /*****************************************************************************
298 * aout_DecPlay : filter & mix the decoded buffer
299 *****************************************************************************/
300 int aout_DecPlay( aout_instance_t * p_aout, aout_input_t * p_input,
301 aout_buffer_t * p_buffer, int i_input_rate )
303 assert( i_input_rate >= INPUT_RATE_DEFAULT / AOUT_MAX_INPUT_RATE &&
304 i_input_rate <= INPUT_RATE_DEFAULT * AOUT_MAX_INPUT_RATE );
306 assert( p_buffer->start_date > 0 );
308 p_buffer->end_date = p_buffer->start_date
309 + (mtime_t)p_buffer->i_nb_samples * 1000000
310 / p_input->input.i_rate;
312 aout_lock_input( p_aout, p_input );
314 if( p_input->b_error )
316 aout_unlock_input( p_aout, p_input );
317 aout_BufferFree( p_buffer );
321 if( p_input->b_changed )
323 /* Maybe the allocation size has changed. Re-allocate a buffer. */
324 aout_buffer_t * p_new_buffer;
325 mtime_t duration = (1000000 * (mtime_t)p_buffer->i_nb_samples)
326 / p_input->input.i_rate;
328 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_new_buffer );
329 vlc_memcpy( p_new_buffer->p_buffer, p_buffer->p_buffer,
330 p_buffer->i_nb_bytes );
331 p_new_buffer->i_nb_samples = p_buffer->i_nb_samples;
332 p_new_buffer->i_nb_bytes = p_buffer->i_nb_bytes;
333 p_new_buffer->start_date = p_buffer->start_date;
334 p_new_buffer->end_date = p_buffer->end_date;
335 aout_BufferFree( p_buffer );
336 p_buffer = p_new_buffer;
337 p_input->b_changed = false;
340 int i_ret = aout_InputPlay( p_aout, p_input, p_buffer, i_input_rate );
342 aout_unlock_input( p_aout, p_input );
347 /* Run the mixer if it is able to run. */
348 aout_lock_mixer( p_aout );
350 aout_MixerRun( p_aout );
352 aout_unlock_mixer( p_aout );
357 int aout_DecGetResetLost( aout_instance_t *p_aout, aout_input_t *p_input )
359 aout_lock_input( p_aout, p_input );
360 int i_value = p_input->i_buffer_lost;
361 p_input->i_buffer_lost = 0;
362 aout_unlock_input( p_aout, p_input );
367 void aout_DecChangePause( aout_instance_t *p_aout, aout_input_t *p_input, bool b_paused, mtime_t i_date )
369 mtime_t i_duration = 0;
370 aout_lock_input( p_aout, p_input );
371 assert( !p_input->b_paused || !b_paused );
372 if( p_input->b_paused )
374 i_duration = i_date - p_input->i_pause_date;
376 p_input->b_paused = b_paused;
377 p_input->i_pause_date = i_date;
378 aout_unlock_input( p_aout, p_input );
380 if( i_duration != 0 )
382 aout_lock_mixer( p_aout );
383 for( aout_buffer_t *p = p_input->fifo.p_first; p != NULL; p = p->p_next )
385 p->start_date += i_duration;
386 p->end_date += i_duration;
388 aout_unlock_mixer( p_aout );
392 void aout_DecFlush( aout_instance_t *p_aout, aout_input_t *p_input )
394 aout_lock_input_fifos( p_aout );
396 aout_FifoSet( p_aout, &p_input->fifo, 0 );
397 p_input->p_first_byte_to_mix = NULL;
399 aout_unlock_input_fifos( p_aout );