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 1.6 2001/07/12 20:31:33 reno 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 /* sizeof(u8) << (p_aout->b_stereo) == 1 */
86 p_aout->date = mdate() + ((((mtime_t)((l_bytes + 4 * p_aout->i_latency) / 1)) * 1000000)
87 / ((mtime_t)p_aout->l_rate));
89 p_aout->pf_play( p_aout, (byte_t *)p_aout->buffer, l_buffer_limit * sizeof(u8) );
90 if ( l_bytes > (l_buffer_limit * sizeof(u8) * 2) ) /* There are 2 channels (left & right) */
92 msleep( p_aout->l_msleep );
96 vlc_mutex_lock( &p_aout->fifos_lock );
98 for ( i_fifo = 0; i_fifo < AOUT_MAX_FIFOS; i_fifo++ )
100 aout_FreeFifo( &p_aout->fifo[i_fifo] );
103 vlc_mutex_unlock( &p_aout->fifos_lock );
106 void aout_U8StereoThread( aout_thread_t * p_aout )
109 long l_buffer, l_buffer_limit, l_bytes;
111 /* As the s32_buffer was created with calloc(), we don't have to set this
112 * memory to zero and we can immediately jump into the thread's loop */
113 while ( ! p_aout->b_die )
115 vlc_mutex_lock( &p_aout->fifos_lock );
117 for ( i_fifo = 0; i_fifo < AOUT_MAX_FIFOS; i_fifo++ )
119 if( p_aout->fifo[i_fifo].b_die )
121 aout_FreeFifo( &p_aout->fifo[i_fifo] );
125 U8StereoPlay( p_aout, &p_aout->fifo[i_fifo] );
129 vlc_mutex_unlock( &p_aout->fifos_lock );
131 l_buffer_limit = p_aout->l_units << 1 ; /* p_aout->b_stereo == 1 */
133 for ( l_buffer = 0; l_buffer < l_buffer_limit; l_buffer++ )
135 ((u8 *)p_aout->buffer)[l_buffer] = (u8)( ( (p_aout->s32_buffer[l_buffer] / AOUT_MAX_FIFOS / 256) + 128 ) * p_aout->i_volume / 256 );
136 p_aout->s32_buffer[l_buffer] = 0;
138 l_bytes = p_aout->pf_getbufinfo( p_aout, l_buffer_limit );
139 /* sizeof(u8) << (p_aout->b_stereo) == 2 */
140 p_aout->date = mdate() + ((((mtime_t)((l_bytes + 4 * p_aout->i_latency) / 2)) * 1000000)
141 / ((mtime_t)p_aout->l_rate));
143 p_aout->pf_play( p_aout, (byte_t *)p_aout->buffer, l_buffer_limit * sizeof(u8) );
144 if ( l_bytes > (l_buffer_limit * sizeof(u8)) )
146 msleep( p_aout->l_msleep );
150 vlc_mutex_lock( &p_aout->fifos_lock );
152 for ( i_fifo = 0; i_fifo < AOUT_MAX_FIFOS; i_fifo++ )
154 aout_FreeFifo( &p_aout->fifo[i_fifo] );
157 vlc_mutex_unlock( &p_aout->fifos_lock );
160 /* Following functions are local */
162 static void U8MonoPlay( aout_thread_t * p_aout, aout_fifo_t * p_fifo )
165 long l_buffer_limit, l_units;
167 switch ( p_fifo->i_type )
169 case AOUT_EMPTY_FIFO:
173 case AOUT_INTF_MONO_FIFO:
175 if ( p_fifo->l_units > p_aout->l_units )
177 /* p_aout->b_stereo == 0 */
178 while ( l_buffer < (p_aout->l_units) )
180 p_aout->s32_buffer[l_buffer++] +=
181 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
182 p_aout->s32_buffer[l_buffer++] +=
183 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
184 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
186 p_fifo->l_units -= p_aout->l_units;
190 /* p_aout->b_stereo == 0 */
191 while ( l_buffer < (p_fifo->l_units) )
193 p_aout->s32_buffer[l_buffer++] +=
194 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
195 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
197 free( p_fifo->buffer ); /* !! */
198 p_fifo->i_type = AOUT_EMPTY_FIFO; /* !! */
199 intf_DbgMsg("aout debug: audio output fifo (%p) destroyed", p_fifo); /* !! */
203 case AOUT_INTF_STEREO_FIFO:
205 if ( p_fifo->l_units > p_aout->l_units )
207 /* p_aout->b_stereo == 0 */
208 while ( l_buffer < (p_aout->l_units) )
210 /* I mix half left - half right */
211 p_aout->s32_buffer[l_buffer++] +=
212 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] ) / 2 +
213 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] ) / 2;
214 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
216 p_fifo->l_units -= p_aout->l_units;
220 /* p_aout->b_stereo == 0 */
221 while ( l_buffer < (p_fifo->l_units) )
223 /* I mix half left - half right */
224 p_aout->s32_buffer[l_buffer++] +=
225 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] ) / 2 +
226 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] ) / 2;
227 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
229 free( p_fifo->buffer ); /* !! */
230 p_fifo->i_type = AOUT_EMPTY_FIFO; /* !! */
231 intf_DbgMsg("aout debug: audio output fifo (%p) destroyed", p_fifo); /* !! */
235 case AOUT_ADEC_MONO_FIFO:
237 l_units = p_aout->l_units;
239 while ( l_units > 0 )
241 if ( !p_fifo->b_next_frame )
243 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
249 if ( p_fifo->l_units > l_units )
251 /* p_aout->b_stereo == 0 */
252 l_buffer_limit = p_aout->l_units;
254 while ( l_buffer < l_buffer_limit )
256 p_aout->s32_buffer[l_buffer++] +=
257 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
259 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
260 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
261 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
263 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
264 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
267 p_fifo->l_units -= l_units;
272 /* p_aout->b_stereo == 0 */
273 l_buffer_limit = l_buffer + (p_fifo->l_units);
275 while ( l_buffer < l_buffer_limit )
277 p_aout->s32_buffer[l_buffer++] +=
278 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
280 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
281 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
282 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
284 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
285 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
288 l_units -= p_fifo->l_units;
290 vlc_mutex_lock( &p_fifo->data_lock );
291 p_fifo->l_start_frame = p_fifo->l_next_frame;
292 vlc_cond_signal( &p_fifo->data_wait );
293 vlc_mutex_unlock( &p_fifo->data_lock );
295 /* p_fifo->b_start_frame = 1; */
296 p_fifo->l_next_frame += 1;
297 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
298 p_fifo->b_next_frame = 0;
303 case AOUT_ADEC_STEREO_FIFO:
305 l_units = p_aout->l_units;
307 while ( l_units > 0 )
309 if ( !p_fifo->b_next_frame )
311 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
317 if ( p_fifo->l_units > l_units )
319 /* p_aout->b_stereo == 0 */
320 l_buffer_limit = p_aout->l_units;
322 while ( l_buffer < l_buffer_limit )
324 /* I mix half left - half right */
325 p_aout->s32_buffer[l_buffer++] +=
326 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] ) / 2 +
327 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] ) / 2;
329 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
330 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
331 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
333 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
334 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
337 p_fifo->l_units -= l_units;
342 /* p_aout->b_stereo == 0 */
343 l_buffer_limit = l_buffer + (p_fifo->l_units);
345 while ( l_buffer < l_buffer_limit )
347 /* I mix half left - half right */
348 p_aout->s32_buffer[l_buffer++] +=
349 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] ) / 2 +
350 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] ) / 2;
352 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
353 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
354 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
356 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
357 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
360 l_units -= p_fifo->l_units;
362 vlc_mutex_lock( &p_fifo->data_lock );
363 p_fifo->l_start_frame = p_fifo->l_next_frame;
364 vlc_cond_signal( &p_fifo->data_wait );
365 vlc_mutex_unlock( &p_fifo->data_lock );
367 /* p_fifo->b_start_frame = 1; */
368 p_fifo->l_next_frame += 1;
369 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
370 p_fifo->b_next_frame = 0;
377 intf_DbgMsg("aout debug: unknown fifo type (%i)", p_fifo->i_type);
383 static void U8StereoPlay( aout_thread_t * p_aout, aout_fifo_t * p_fifo )
386 long l_buffer_limit, l_units;
388 switch ( p_fifo->i_type )
390 case AOUT_EMPTY_FIFO:
394 case AOUT_INTF_MONO_FIFO:
396 if ( p_fifo->l_units > p_aout->l_units )
398 while ( l_buffer < (p_aout->l_units << 1) ) /* p_aout->b_stereo == 1 */
400 p_aout->s32_buffer[l_buffer++] +=
401 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
402 p_aout->s32_buffer[l_buffer++] +=
403 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
404 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
406 p_fifo->l_units -= p_aout->l_units;
410 while ( l_buffer < (p_fifo->l_units << 1) ) /* p_aout->b_stereo == 1 */
412 p_aout->s32_buffer[l_buffer++] +=
413 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
414 p_aout->s32_buffer[l_buffer++] +=
415 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
416 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
418 free( p_fifo->buffer ); /* !! */
419 p_fifo->i_type = AOUT_EMPTY_FIFO; /* !! */
420 intf_DbgMsg("aout debug: audio output fifo (%p) destroyed", p_fifo); /* !! */
424 case AOUT_INTF_STEREO_FIFO:
426 if ( p_fifo->l_units > p_aout->l_units )
428 while ( l_buffer < (p_aout->l_units << 1) ) /* p_aout->b_stereo == 1 */
430 p_aout->s32_buffer[l_buffer++] +=
431 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
432 p_aout->s32_buffer[l_buffer++] +=
433 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
434 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
436 p_fifo->l_units -= p_aout->l_units;
440 while ( l_buffer < (p_fifo->l_units << 1) ) /* p_aout->b_stereo == 1 */
442 p_aout->s32_buffer[l_buffer++] +=
443 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
444 p_aout->s32_buffer[l_buffer++] +=
445 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
446 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
448 free( p_fifo->buffer ); /* !! */
449 p_fifo->i_type = AOUT_EMPTY_FIFO; /* !! */
450 intf_DbgMsg("aout debug: audio output fifo (%p) destroyed", p_fifo); /* !! */
454 case AOUT_ADEC_MONO_FIFO:
456 l_units = p_aout->l_units;
458 while ( l_units > 0 )
460 if ( !p_fifo->b_next_frame )
462 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
468 if ( p_fifo->l_units > l_units )
470 l_buffer_limit = p_aout->l_units << 1; /* p_aout->b_stereo == 1 */
471 while ( l_buffer < l_buffer_limit )
473 p_aout->s32_buffer[l_buffer++] +=
474 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
475 p_aout->s32_buffer[l_buffer++] +=
476 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
478 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
479 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
480 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
482 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
483 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
486 p_fifo->l_units -= l_units;
491 /* p_aout->b_stereo == 1 */
492 l_buffer_limit = l_buffer + (p_fifo->l_units << 1);
494 while ( l_buffer < l_buffer_limit )
496 p_aout->s32_buffer[l_buffer++] +=
497 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
498 p_aout->s32_buffer[l_buffer++] +=
499 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
501 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
502 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
503 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
505 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
506 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
509 l_units -= p_fifo->l_units;
511 vlc_mutex_lock( &p_fifo->data_lock );
512 p_fifo->l_start_frame = p_fifo->l_next_frame;
513 vlc_cond_signal( &p_fifo->data_wait );
514 vlc_mutex_unlock( &p_fifo->data_lock );
516 /* p_fifo->b_start_frame = 1; */
517 p_fifo->l_next_frame += 1;
518 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
519 p_fifo->b_next_frame = 0;
524 case AOUT_ADEC_STEREO_FIFO:
526 l_units = p_aout->l_units;
528 while ( l_units > 0 )
530 if ( !p_fifo->b_next_frame )
532 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
538 if ( p_fifo->l_units > l_units )
540 l_buffer_limit = p_aout->l_units << 1; /* p_aout->b_stereo == 1 */
541 while ( l_buffer < l_buffer_limit )
543 p_aout->s32_buffer[l_buffer++] +=
544 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
545 p_aout->s32_buffer[l_buffer++] +=
546 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
548 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
549 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
550 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
552 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
553 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
556 p_fifo->l_units -= l_units;
561 /* p_aout->b_stereo == 1 */
562 l_buffer_limit = l_buffer + (p_fifo->l_units << 1);
564 while ( l_buffer < l_buffer_limit )
566 p_aout->s32_buffer[l_buffer++] +=
567 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
568 p_aout->s32_buffer[l_buffer++] +=
569 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
571 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
572 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
573 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
575 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
576 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
579 l_units -= p_fifo->l_units;
581 vlc_mutex_lock( &p_fifo->data_lock );
582 p_fifo->l_start_frame = p_fifo->l_next_frame;
583 vlc_cond_signal( &p_fifo->data_wait );
584 vlc_mutex_unlock( &p_fifo->data_lock );
586 /* p_fifo->b_start_frame = 1; */
587 p_fifo->l_next_frame += 1;
588 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
589 p_fifo->b_next_frame = 0;
595 intf_DbgMsg("aout debug: unknown fifo type (%i)", p_fifo->i_type);