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( 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" );
64 if( p_format->i_channels != aout_FormatNbChannels( p_format ) )
66 msg_Err( p_aout, "incompatible audio channels count with layout mask" );
70 if( p_format->i_rate > 192000 )
72 msg_Err( p_aout, "excessive audio sample frequency (%u)",
76 if( p_format->i_rate < 4000 )
78 msg_Err( p_aout, "too low audio sample frequency (%u)",
83 /* We can only be called by the decoder, so no need to lock
85 aout_lock_mixer( p_aout );
87 if ( p_aout->i_nb_inputs >= AOUT_MAX_INPUTS )
89 msg_Err( p_aout, "too many inputs already (%d)", p_aout->i_nb_inputs );
93 p_input = calloc( 1, sizeof(aout_input_t));
97 vlc_mutex_init( &p_input->lock );
99 p_input->b_changed = false;
100 p_input->b_error = true;
101 p_input->b_paused = false;
102 p_input->i_pause_date = 0;
104 aout_FormatPrepare( p_format );
106 memcpy( &p_input->input, p_format,
107 sizeof(audio_sample_format_t) );
109 p_input->replay_gain = *p_replay_gain;
111 aout_lock_input_fifos( p_aout );
112 p_aout->pp_inputs[p_aout->i_nb_inputs] = p_input;
113 p_aout->i_nb_inputs++;
115 if ( p_aout->mixer.b_error )
119 var_Destroy( p_aout, "audio-device" );
120 var_Destroy( p_aout, "audio-channels" );
122 /* Recreate the output using the new format. */
123 if ( aout_OutputNew( p_aout, p_format ) < 0 )
125 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
127 aout_lock_input( p_aout, p_aout->pp_inputs[i] );
128 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
129 aout_unlock_input( p_aout, p_aout->pp_inputs[i] );
131 aout_unlock_input_fifos( p_aout );
132 aout_unlock_mixer( p_aout );
136 /* Create other input streams. */
137 for ( i = 0; i < p_aout->i_nb_inputs - 1; i++ )
139 aout_input_t *p_input = p_aout->pp_inputs[i];
141 aout_lock_input( p_aout, p_input );
142 aout_InputDelete( p_aout, p_input );
143 aout_InputNew( p_aout, p_input, &p_input->request_vout );
144 aout_unlock_input( p_aout, p_input );
149 aout_MixerDelete( p_aout );
152 if ( aout_MixerNew( p_aout ) == -1 )
154 aout_OutputDelete( p_aout );
155 aout_unlock_input_fifos( p_aout );
159 aout_InputNew( p_aout, p_input, p_request_vout );
160 aout_unlock_input_fifos( p_aout );
162 aout_unlock_mixer( p_aout );
167 aout_unlock_mixer( p_aout );
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 const audio_replay_gain_t *p_replay_gain,
175 const aout_request_vout_t *p_request_video )
177 aout_instance_t *p_aout = *pp_aout;
178 if ( p_aout == NULL )
180 msg_Dbg( p_this, "no aout present, spawning one" );
181 p_aout = aout_New( p_this );
183 /* Everything failed, I'm a loser, I just wanna die */
187 vlc_object_attach( p_aout, p_this );
191 return DecNew( p_aout, p_format, p_replay_gain, p_request_video );
194 /*****************************************************************************
195 * aout_DecDelete : delete a decoder
196 *****************************************************************************/
197 int aout_DecDelete( aout_instance_t * p_aout, aout_input_t * p_input )
201 /* This function can only be called by the decoder itself, so no need
202 * to lock p_input->lock. */
203 aout_lock_mixer( p_aout );
205 for ( i_input = 0; i_input < p_aout->i_nb_inputs; i_input++ )
207 if ( p_aout->pp_inputs[i_input] == p_input )
213 if ( i_input == p_aout->i_nb_inputs )
215 msg_Err( p_aout, "cannot find an input to delete" );
216 aout_unlock_mixer( p_aout );
220 /* Remove the input from the list. */
221 memmove( &p_aout->pp_inputs[i_input], &p_aout->pp_inputs[i_input + 1],
222 (AOUT_MAX_INPUTS - i_input - 1) * sizeof(aout_input_t *) );
223 p_aout->i_nb_inputs--;
225 aout_InputDelete( p_aout, p_input );
227 vlc_mutex_destroy( &p_input->lock );
230 if ( !p_aout->i_nb_inputs )
232 aout_OutputDelete( p_aout );
233 aout_MixerDelete( p_aout );
234 var_Destroy( p_aout, "audio-device" );
235 var_Destroy( p_aout, "audio-channels" );
238 aout_unlock_mixer( p_aout );
248 /*****************************************************************************
249 * aout_DecNewBuffer : ask for a new empty buffer
250 *****************************************************************************/
251 aout_buffer_t * aout_DecNewBuffer( aout_input_t * p_input,
252 size_t i_nb_samples )
254 aout_buffer_t * p_buffer;
257 aout_lock_input( NULL, p_input );
259 if ( p_input->b_error )
261 aout_unlock_input( NULL, p_input );
265 duration = (1000000 * (mtime_t)i_nb_samples) / p_input->input.i_rate;
267 /* This necessarily allocates in the heap. */
268 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_buffer );
269 if( p_buffer != NULL )
270 p_buffer->i_nb_bytes = i_nb_samples * p_input->input.i_bytes_per_frame
271 / p_input->input.i_frame_length;
273 /* Suppose the decoder doesn't have more than one buffered buffer */
274 p_input->b_changed = false;
276 aout_unlock_input( NULL, p_input );
278 if( p_buffer == NULL )
281 p_buffer->i_nb_samples = i_nb_samples;
282 p_buffer->start_date = p_buffer->end_date = 0;
286 /*****************************************************************************
287 * aout_DecDeleteBuffer : destroy an undecoded buffer
288 *****************************************************************************/
289 void aout_DecDeleteBuffer( aout_instance_t * p_aout, aout_input_t * p_input,
290 aout_buffer_t * p_buffer )
292 (void)p_aout; (void)p_input;
293 aout_BufferFree( p_buffer );
296 /*****************************************************************************
297 * aout_DecPlay : filter & mix the decoded buffer
298 *****************************************************************************/
299 int aout_DecPlay( aout_instance_t * p_aout, aout_input_t * p_input,
300 aout_buffer_t * p_buffer, int i_input_rate )
302 assert( i_input_rate >= INPUT_RATE_DEFAULT / AOUT_MAX_INPUT_RATE &&
303 i_input_rate <= INPUT_RATE_DEFAULT * AOUT_MAX_INPUT_RATE );
305 assert( p_buffer->start_date > 0 );
307 p_buffer->end_date = p_buffer->start_date
308 + (mtime_t)p_buffer->i_nb_samples * 1000000
309 / p_input->input.i_rate;
311 aout_lock_input( p_aout, p_input );
313 if( p_input->b_error )
315 aout_unlock_input( p_aout, p_input );
316 aout_BufferFree( p_buffer );
320 if( p_input->b_changed )
322 /* Maybe the allocation size has changed. Re-allocate a buffer. */
323 aout_buffer_t * p_new_buffer;
324 mtime_t duration = (1000000 * (mtime_t)p_buffer->i_nb_samples)
325 / p_input->input.i_rate;
327 aout_BufferAlloc( &p_input->input_alloc, duration, NULL, p_new_buffer );
328 vlc_memcpy( p_new_buffer->p_buffer, p_buffer->p_buffer,
329 p_buffer->i_nb_bytes );
330 p_new_buffer->i_nb_samples = p_buffer->i_nb_samples;
331 p_new_buffer->i_nb_bytes = p_buffer->i_nb_bytes;
332 p_new_buffer->start_date = p_buffer->start_date;
333 p_new_buffer->end_date = p_buffer->end_date;
334 aout_BufferFree( p_buffer );
335 p_buffer = p_new_buffer;
336 p_input->b_changed = false;
339 int i_ret = aout_InputPlay( p_aout, p_input, p_buffer, i_input_rate );
341 aout_unlock_input( p_aout, p_input );
346 /* Run the mixer if it is able to run. */
347 aout_lock_mixer( p_aout );
349 aout_MixerRun( p_aout );
351 aout_unlock_mixer( p_aout );
356 int aout_DecGetResetLost( aout_instance_t *p_aout, aout_input_t *p_input )
358 aout_lock_input( p_aout, p_input );
359 int i_value = p_input->i_buffer_lost;
360 p_input->i_buffer_lost = 0;
361 aout_unlock_input( p_aout, p_input );
366 void aout_DecChangePause( aout_instance_t *p_aout, aout_input_t *p_input, bool b_paused, mtime_t i_date )
368 mtime_t i_duration = 0;
369 aout_lock_input( p_aout, p_input );
370 assert( !p_input->b_paused || !b_paused );
371 if( p_input->b_paused )
373 i_duration = i_date - p_input->i_pause_date;
375 p_input->b_paused = b_paused;
376 p_input->i_pause_date = i_date;
377 aout_unlock_input( p_aout, p_input );
379 if( i_duration != 0 )
381 aout_lock_mixer( p_aout );
382 for( aout_buffer_t *p = p_input->fifo.p_first; p != NULL; p = p->p_next )
384 p->start_date += i_duration;
385 p->end_date += i_duration;
387 aout_unlock_mixer( p_aout );
391 void aout_DecFlush( aout_instance_t *p_aout, aout_input_t *p_input )
393 aout_lock_input_fifos( p_aout );
395 aout_FifoSet( p_aout, &p_input->fifo, 0 );
396 p_input->p_first_byte_to_mix = NULL;
398 aout_unlock_input_fifos( p_aout );