1 /*****************************************************************************
2 * aout_u8.c: 8 bit unsigned audio output functions
3 *****************************************************************************
4 * Copyright (C) 1999, 2000, 2001 VideoLAN
5 * $Id: aout_u8.c,v 1.5 2001/05/15 16:19:42 sam Exp $
7 * Authors: Michel Kaempf <maxx@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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
29 #include <stdio.h> /* "intf_msg.h" */
30 #include <stdlib.h> /* calloc(), malloc(), free() */
35 #include "mtime.h" /* mtime_t, mdate(), msleep() */
37 #include "intf_msg.h" /* intf_DbgMsg(), intf_ErrMsg() */
39 #include "audio_output.h"
40 #include "aout_common.h"
42 /*****************************************************************************
44 *****************************************************************************/
45 static void U8MonoPlay ( aout_thread_t * p_aout, aout_fifo_t * p_fifo );
46 static void U8StereoPlay ( aout_thread_t * p_aout, aout_fifo_t * p_fifo );
48 /*****************************************************************************
50 *****************************************************************************/
51 void aout_U8MonoThread( aout_thread_t * p_aout )
54 long l_buffer, l_buffer_limit, l_bytes;
56 /* As the s32_buffer was created with calloc(), we don't have to set this
57 * memory to zero and we can immediately jump into the thread's loop */
58 while ( ! p_aout->b_die )
60 vlc_mutex_lock( &p_aout->fifos_lock );
62 for ( i_fifo = 0; i_fifo < AOUT_MAX_FIFOS; i_fifo++ )
64 if( p_aout->fifo[i_fifo].b_die )
66 aout_FreeFifo( &p_aout->fifo[i_fifo] );
70 U8MonoPlay( p_aout, &p_aout->fifo[i_fifo] );
74 vlc_mutex_unlock( &p_aout->fifos_lock );
76 l_buffer_limit = p_aout->l_units; /* p_aout->b_stereo == 0 */
78 for ( l_buffer = 0; l_buffer < l_buffer_limit; l_buffer++ )
80 ((u8 *)p_aout->buffer)[l_buffer] = (u8)( ( (p_aout->s32_buffer[l_buffer] / AOUT_MAX_FIFOS / 256 ) + 128 ) * p_aout->i_volume / 256 );
81 p_aout->s32_buffer[l_buffer] = 0;
84 l_bytes = p_aout->pf_getbufinfo( p_aout, l_buffer_limit );
85 p_aout->date = mdate() + ((((mtime_t)(l_bytes / 1 )) * 1000000) / ((mtime_t)p_aout->l_rate)); /* sizeof(u8) << (p_aout->b_stereo) == 1 */
86 p_aout->pf_play( p_aout, (byte_t *)p_aout->buffer, l_buffer_limit * sizeof(u8) );
87 if ( l_bytes > (l_buffer_limit * sizeof(u8) * 2) ) /* There are 2 channels (left & right) */
89 msleep( p_aout->l_msleep );
93 vlc_mutex_lock( &p_aout->fifos_lock );
95 for ( i_fifo = 0; i_fifo < AOUT_MAX_FIFOS; i_fifo++ )
97 aout_FreeFifo( &p_aout->fifo[i_fifo] );
100 vlc_mutex_unlock( &p_aout->fifos_lock );
103 void aout_U8StereoThread( aout_thread_t * p_aout )
106 long l_buffer, l_buffer_limit, l_bytes;
108 /* As the s32_buffer was created with calloc(), we don't have to set this
109 * memory to zero and we can immediately jump into the thread's loop */
110 while ( ! p_aout->b_die )
112 vlc_mutex_lock( &p_aout->fifos_lock );
114 for ( i_fifo = 0; i_fifo < AOUT_MAX_FIFOS; i_fifo++ )
116 if( p_aout->fifo[i_fifo].b_die )
118 aout_FreeFifo( &p_aout->fifo[i_fifo] );
122 U8StereoPlay( p_aout, &p_aout->fifo[i_fifo] );
126 vlc_mutex_unlock( &p_aout->fifos_lock );
128 l_buffer_limit = p_aout->l_units << 1 ; /* p_aout->b_stereo == 1 */
130 for ( l_buffer = 0; l_buffer < l_buffer_limit; l_buffer++ )
132 ((u8 *)p_aout->buffer)[l_buffer] = (u8)( ( (p_aout->s32_buffer[l_buffer] / AOUT_MAX_FIFOS / 256) + 128 ) * p_aout->i_volume / 256 );
133 p_aout->s32_buffer[l_buffer] = 0;
135 l_bytes = p_aout->pf_getbufinfo( p_aout, l_buffer_limit );
136 p_aout->date = mdate() + ((((mtime_t)(l_bytes / 2 )) * 1000000) / ((mtime_t)p_aout->l_rate)); /* sizeof(u8) << (p_aout->b_stereo) == 2 */
137 p_aout->pf_play( p_aout, (byte_t *)p_aout->buffer, l_buffer_limit * sizeof(u8) );
138 if ( l_bytes > (l_buffer_limit * sizeof(u8)) )
140 msleep( p_aout->l_msleep );
144 vlc_mutex_lock( &p_aout->fifos_lock );
146 for ( i_fifo = 0; i_fifo < AOUT_MAX_FIFOS; i_fifo++ )
148 aout_FreeFifo( &p_aout->fifo[i_fifo] );
151 vlc_mutex_unlock( &p_aout->fifos_lock );
154 /* Following functions are local */
156 static void U8MonoPlay( aout_thread_t * p_aout, aout_fifo_t * p_fifo )
159 long l_buffer_limit, l_units;
161 switch ( p_fifo->i_type )
163 case AOUT_EMPTY_FIFO:
167 case AOUT_INTF_MONO_FIFO:
169 if ( p_fifo->l_units > p_aout->l_units )
171 /* p_aout->b_stereo == 0 */
172 while ( l_buffer < (p_aout->l_units) )
174 p_aout->s32_buffer[l_buffer++] +=
175 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
176 p_aout->s32_buffer[l_buffer++] +=
177 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
178 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
180 p_fifo->l_units -= p_aout->l_units;
184 /* p_aout->b_stereo == 0 */
185 while ( l_buffer < (p_fifo->l_units) )
187 p_aout->s32_buffer[l_buffer++] +=
188 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
189 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
191 free( p_fifo->buffer ); /* !! */
192 p_fifo->i_type = AOUT_EMPTY_FIFO; /* !! */
193 intf_DbgMsg("aout debug: audio output fifo (%p) destroyed", p_fifo); /* !! */
197 case AOUT_INTF_STEREO_FIFO:
199 if ( p_fifo->l_units > p_aout->l_units )
201 /* p_aout->b_stereo == 0 */
202 while ( l_buffer < (p_aout->l_units) )
204 /* I mix half left - half right */
205 p_aout->s32_buffer[l_buffer++] +=
206 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] ) / 2 +
207 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] ) / 2;
208 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
210 p_fifo->l_units -= p_aout->l_units;
214 /* p_aout->b_stereo == 0 */
215 while ( l_buffer < (p_fifo->l_units) )
217 /* I mix half left - half right */
218 p_aout->s32_buffer[l_buffer++] +=
219 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] ) / 2 +
220 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] ) / 2;
221 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
223 free( p_fifo->buffer ); /* !! */
224 p_fifo->i_type = AOUT_EMPTY_FIFO; /* !! */
225 intf_DbgMsg("aout debug: audio output fifo (%p) destroyed", p_fifo); /* !! */
229 case AOUT_ADEC_MONO_FIFO:
231 l_units = p_aout->l_units;
233 while ( l_units > 0 )
235 if ( !p_fifo->b_next_frame )
237 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
243 if ( p_fifo->l_units > l_units )
245 /* p_aout->b_stereo == 0 */
246 l_buffer_limit = p_aout->l_units;
248 while ( l_buffer < l_buffer_limit )
250 p_aout->s32_buffer[l_buffer++] +=
251 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
253 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
254 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
255 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
257 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
258 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
261 p_fifo->l_units -= l_units;
266 /* p_aout->b_stereo == 0 */
267 l_buffer_limit = l_buffer + (p_fifo->l_units);
269 while ( l_buffer < l_buffer_limit )
271 p_aout->s32_buffer[l_buffer++] +=
272 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
274 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
275 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
276 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
278 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
279 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
282 l_units -= p_fifo->l_units;
284 vlc_mutex_lock( &p_fifo->data_lock );
285 p_fifo->l_start_frame = p_fifo->l_next_frame;
286 vlc_cond_signal( &p_fifo->data_wait );
287 vlc_mutex_unlock( &p_fifo->data_lock );
289 /* p_fifo->b_start_frame = 1; */
290 p_fifo->l_next_frame += 1;
291 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
292 p_fifo->b_next_frame = 0;
297 case AOUT_ADEC_STEREO_FIFO:
299 l_units = p_aout->l_units;
301 while ( l_units > 0 )
303 if ( !p_fifo->b_next_frame )
305 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
311 if ( p_fifo->l_units > l_units )
313 /* p_aout->b_stereo == 0 */
314 l_buffer_limit = p_aout->l_units;
316 while ( l_buffer < l_buffer_limit )
318 /* I mix half left - half right */
319 p_aout->s32_buffer[l_buffer++] +=
320 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] ) / 2 +
321 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] ) / 2;
323 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
324 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
325 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
327 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
328 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
331 p_fifo->l_units -= l_units;
336 /* p_aout->b_stereo == 0 */
337 l_buffer_limit = l_buffer + (p_fifo->l_units);
339 while ( l_buffer < l_buffer_limit )
341 /* I mix half left - half right */
342 p_aout->s32_buffer[l_buffer++] +=
343 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] ) / 2 +
344 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] ) / 2;
346 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
347 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
348 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
350 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
351 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
354 l_units -= p_fifo->l_units;
356 vlc_mutex_lock( &p_fifo->data_lock );
357 p_fifo->l_start_frame = p_fifo->l_next_frame;
358 vlc_cond_signal( &p_fifo->data_wait );
359 vlc_mutex_unlock( &p_fifo->data_lock );
361 /* p_fifo->b_start_frame = 1; */
362 p_fifo->l_next_frame += 1;
363 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
364 p_fifo->b_next_frame = 0;
371 intf_DbgMsg("aout debug: unknown fifo type (%i)", p_fifo->i_type);
377 static void U8StereoPlay( aout_thread_t * p_aout, aout_fifo_t * p_fifo )
380 long l_buffer_limit, l_units;
382 switch ( p_fifo->i_type )
384 case AOUT_EMPTY_FIFO:
388 case AOUT_INTF_MONO_FIFO:
390 if ( p_fifo->l_units > p_aout->l_units )
392 while ( l_buffer < (p_aout->l_units << 1) ) /* p_aout->b_stereo == 1 */
394 p_aout->s32_buffer[l_buffer++] +=
395 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
396 p_aout->s32_buffer[l_buffer++] +=
397 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
398 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
400 p_fifo->l_units -= p_aout->l_units;
404 while ( l_buffer < (p_fifo->l_units << 1) ) /* p_aout->b_stereo == 1 */
406 p_aout->s32_buffer[l_buffer++] +=
407 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
408 p_aout->s32_buffer[l_buffer++] +=
409 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
410 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
412 free( p_fifo->buffer ); /* !! */
413 p_fifo->i_type = AOUT_EMPTY_FIFO; /* !! */
414 intf_DbgMsg("aout debug: audio output fifo (%p) destroyed", p_fifo); /* !! */
418 case AOUT_INTF_STEREO_FIFO:
420 if ( p_fifo->l_units > p_aout->l_units )
422 while ( l_buffer < (p_aout->l_units << 1) ) /* p_aout->b_stereo == 1 */
424 p_aout->s32_buffer[l_buffer++] +=
425 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
426 p_aout->s32_buffer[l_buffer++] +=
427 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
428 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
430 p_fifo->l_units -= p_aout->l_units;
434 while ( l_buffer < (p_fifo->l_units << 1) ) /* p_aout->b_stereo == 1 */
436 p_aout->s32_buffer[l_buffer++] +=
437 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
438 p_aout->s32_buffer[l_buffer++] +=
439 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
440 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
442 free( p_fifo->buffer ); /* !! */
443 p_fifo->i_type = AOUT_EMPTY_FIFO; /* !! */
444 intf_DbgMsg("aout debug: audio output fifo (%p) destroyed", p_fifo); /* !! */
448 case AOUT_ADEC_MONO_FIFO:
450 l_units = p_aout->l_units;
452 while ( l_units > 0 )
454 if ( !p_fifo->b_next_frame )
456 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
462 if ( p_fifo->l_units > l_units )
464 l_buffer_limit = p_aout->l_units << 1; /* p_aout->b_stereo == 1 */
465 while ( l_buffer < l_buffer_limit )
467 p_aout->s32_buffer[l_buffer++] +=
468 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
469 p_aout->s32_buffer[l_buffer++] +=
470 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
472 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
473 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
474 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
476 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
477 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
480 p_fifo->l_units -= l_units;
485 /* p_aout->b_stereo == 1 */
486 l_buffer_limit = l_buffer + (p_fifo->l_units << 1);
488 while ( l_buffer < l_buffer_limit )
490 p_aout->s32_buffer[l_buffer++] +=
491 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
492 p_aout->s32_buffer[l_buffer++] +=
493 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
495 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
496 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
497 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
499 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
500 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
503 l_units -= p_fifo->l_units;
505 vlc_mutex_lock( &p_fifo->data_lock );
506 p_fifo->l_start_frame = p_fifo->l_next_frame;
507 vlc_cond_signal( &p_fifo->data_wait );
508 vlc_mutex_unlock( &p_fifo->data_lock );
510 /* p_fifo->b_start_frame = 1; */
511 p_fifo->l_next_frame += 1;
512 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
513 p_fifo->b_next_frame = 0;
518 case AOUT_ADEC_STEREO_FIFO:
520 l_units = p_aout->l_units;
522 while ( l_units > 0 )
524 if ( !p_fifo->b_next_frame )
526 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
532 if ( p_fifo->l_units > l_units )
534 l_buffer_limit = p_aout->l_units << 1; /* p_aout->b_stereo == 1 */
535 while ( l_buffer < l_buffer_limit )
537 p_aout->s32_buffer[l_buffer++] +=
538 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
539 p_aout->s32_buffer[l_buffer++] +=
540 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
542 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
543 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
544 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
546 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
547 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
550 p_fifo->l_units -= l_units;
555 /* p_aout->b_stereo == 1 */
556 l_buffer_limit = l_buffer + (p_fifo->l_units << 1);
558 while ( l_buffer < l_buffer_limit )
560 p_aout->s32_buffer[l_buffer++] +=
561 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
562 p_aout->s32_buffer[l_buffer++] +=
563 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
565 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
566 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
567 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
569 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
570 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
573 l_units -= p_fifo->l_units;
575 vlc_mutex_lock( &p_fifo->data_lock );
576 p_fifo->l_start_frame = p_fifo->l_next_frame;
577 vlc_cond_signal( &p_fifo->data_wait );
578 vlc_mutex_unlock( &p_fifo->data_lock );
580 /* p_fifo->b_start_frame = 1; */
581 p_fifo->l_next_frame += 1;
582 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
583 p_fifo->b_next_frame = 0;
589 intf_DbgMsg("aout debug: unknown fifo type (%i)", p_fifo->i_type);