1 /*****************************************************************************
2 * aout_s16.c: 16 bit signed audio output functions
3 *****************************************************************************
4 * Copyright (C) 1999, 2000, 2001 VideoLAN
6 * Authors: Michel Kaempf <maxx@via.ecp.fr>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
21 *****************************************************************************/
23 /*****************************************************************************
25 *****************************************************************************/
28 #include <stdio.h> /* "intf_msg.h" */
29 #include <stdlib.h> /* calloc(), malloc(), free() */
34 #include "mtime.h" /* mtime_t, mdate(), msleep() */
36 #include "intf_msg.h" /* intf_DbgMsg(), intf_ErrMsg() */
38 #include "audio_output.h"
39 #include "aout_common.h"
41 /*****************************************************************************
43 *****************************************************************************/
44 static void S16StereoPlay( aout_thread_t * p_aout, aout_fifo_t * p_fifo );
46 /*****************************************************************************
48 *****************************************************************************/
49 void aout_S16MonoThread( aout_thread_t * p_aout )
51 intf_ErrMsg( "aout error: 16 bit signed mono thread unsupported" );
54 void aout_S16StereoThread( aout_thread_t * p_aout )
57 long l_buffer, l_buffer_limit, l_bytes;
59 /* As the s32_buffer was created with calloc(), we don't have to set this
60 * memory to zero and we can immediately jump into the thread's loop */
61 while ( ! p_aout->b_die )
63 vlc_mutex_lock( &p_aout->fifos_lock );
65 for ( i_fifo = 0; i_fifo < AOUT_MAX_FIFOS; i_fifo++ )
67 if( p_aout->fifo[i_fifo].b_die )
69 aout_FreeFifo( &p_aout->fifo[i_fifo] );
73 S16StereoPlay( p_aout, &p_aout->fifo[i_fifo] );
77 vlc_mutex_unlock( &p_aout->fifos_lock );
79 l_buffer_limit = p_aout->l_units << 1; /* p_aout->b_stereo == 1 */
81 for ( l_buffer = 0; l_buffer < l_buffer_limit; l_buffer++ )
83 ((s16 *)p_aout->buffer)[l_buffer] =
84 (s16)( ( p_aout->s32_buffer[l_buffer] / AOUT_MAX_FIFOS )
85 * p_aout->vol / 256 ) ;
86 p_aout->s32_buffer[l_buffer] = 0;
89 l_bytes = p_aout->pf_getbufinfo( p_aout, l_buffer_limit );
91 fprintf(stderr,"l_bytes 1: %li\n",l_bytes);
92 fprintf(stderr," playing...\n");
95 /* sizeof(s16) << (p_aout->b_stereo) == 4 */
96 p_aout->date = mdate() + ((((mtime_t)(l_bytes / 4)) * 1000000)
97 / ((mtime_t)p_aout->l_rate));
98 p_aout->pf_play( p_aout, (byte_t *)p_aout->buffer,
99 l_buffer_limit * sizeof(s16) );
101 fprintf( stderr,"l_bytes #: %li\n",
102 p_aout->pf_getbufinfo( p_aout, l_buffer_limit ) );
105 if ( l_bytes > (l_buffer_limit * sizeof(s16)) )
107 msleep( p_aout->l_msleep );
109 fprintf(stderr," sleeping...\n");
110 msleep( p_aout->l_msleep / 2);
111 l_bytes = p_aout->pf_getbufinfo( p_aout, l_buffer_limit );
112 fprintf(stderr,"l_bytes *: %li\n",l_bytes);
113 msleep( p_aout->l_msleep / 2);
117 fprintf(stderr," not sleeping.\n");
118 l_bytes = p_aout->pf_getbufinfo( p_aout, l_buffer_limit );
119 fprintf(stderr,"l_bytes 2: %li\n\n",l_bytes);
124 vlc_mutex_lock( &p_aout->fifos_lock );
126 for ( i_fifo = 0; i_fifo < AOUT_MAX_FIFOS; i_fifo++ )
128 aout_FreeFifo( &p_aout->fifo[i_fifo] );
131 vlc_mutex_unlock( &p_aout->fifos_lock );
134 /* Following functions are local */
136 static void S16StereoPlay( aout_thread_t * p_aout, aout_fifo_t * p_fifo )
139 long l_buffer_limit, l_units;
141 switch ( p_fifo->i_type )
143 case AOUT_EMPTY_FIFO:
147 case AOUT_INTF_MONO_FIFO:
149 if ( p_fifo->l_units > p_aout->l_units )
151 /* p_aout->b_stereo == 1 */
152 while ( l_buffer < (p_aout->l_units << 1) )
154 p_aout->s32_buffer[l_buffer++] +=
155 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
156 p_aout->s32_buffer[l_buffer++] +=
157 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
158 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
160 p_fifo->l_units -= p_aout->l_units;
164 /* p_aout->b_stereo == 1 */
165 while ( l_buffer < (p_fifo->l_units << 1) )
167 p_aout->s32_buffer[l_buffer++] +=
168 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
169 p_aout->s32_buffer[l_buffer++] +=
170 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
171 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
173 free( p_fifo->buffer ); /* !! */
174 p_fifo->i_type = AOUT_EMPTY_FIFO; /* !! */
178 case AOUT_INTF_STEREO_FIFO:
180 if ( p_fifo->l_units > p_aout->l_units )
182 /* p_aout->b_stereo == 1 */
183 while ( l_buffer < (p_aout->l_units << 1) )
185 p_aout->s32_buffer[l_buffer++] +=
186 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
187 p_aout->s32_buffer[l_buffer++] +=
188 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
189 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
191 p_fifo->l_units -= p_aout->l_units;
195 /* p_aout->b_stereo == 1 */
196 while ( l_buffer < (p_fifo->l_units << 1) )
198 p_aout->s32_buffer[l_buffer++] +=
199 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
200 p_aout->s32_buffer[l_buffer++] +=
201 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
202 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
204 free( p_fifo->buffer );
205 p_fifo->i_type = AOUT_EMPTY_FIFO;
209 case AOUT_ADEC_MONO_FIFO:
211 l_units = p_aout->l_units;
212 while ( l_units > 0 )
214 if ( !p_fifo->b_next_frame )
216 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
222 if ( p_fifo->l_units > l_units )
224 /* p_aout->b_stereo == 1 */
225 l_buffer_limit = p_aout->l_units << 1;
227 while ( l_buffer < l_buffer_limit )
229 p_aout->s32_buffer[l_buffer++] +=
230 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
231 p_aout->s32_buffer[l_buffer++] +=
232 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
234 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
235 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
236 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
238 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
239 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
242 p_fifo->l_units -= l_units;
247 /* p_aout->b_stereo == 1 */
248 l_buffer_limit = l_buffer + (p_fifo->l_units << 1);
250 while ( l_buffer < l_buffer_limit )
252 p_aout->s32_buffer[l_buffer++] +=
253 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
254 p_aout->s32_buffer[l_buffer++] +=
255 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
257 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
258 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
259 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
261 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
262 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
265 l_units -= p_fifo->l_units;
267 vlc_mutex_lock( &p_fifo->data_lock );
268 p_fifo->l_start_frame = p_fifo->l_next_frame;
269 vlc_cond_signal( &p_fifo->data_wait );
270 vlc_mutex_unlock( &p_fifo->data_lock );
272 /* p_fifo->b_start_frame = 1; */
273 p_fifo->l_next_frame += 1;
274 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
275 p_fifo->b_next_frame = 0;
280 case AOUT_ADEC_STEREO_FIFO:
282 l_units = p_aout->l_units;
283 while ( l_units > 0 )
285 if ( !p_fifo->b_next_frame )
287 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
293 if ( p_fifo->l_units > l_units )
295 /* p_aout->b_stereo == 1 */
296 l_buffer_limit = p_aout->l_units << 1;
298 while ( l_buffer < l_buffer_limit )
300 p_aout->s32_buffer[l_buffer++] +=
301 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
302 p_aout->s32_buffer[l_buffer++] +=
303 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
305 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
306 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
307 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
309 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
310 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
313 p_fifo->l_units -= l_units;
318 /* p_aout->b_stereo == 1 */
319 l_buffer_limit = l_buffer + (p_fifo->l_units << 1);
321 while ( l_buffer < l_buffer_limit )
323 p_aout->s32_buffer[l_buffer++] +=
324 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
325 p_aout->s32_buffer[l_buffer++] +=
326 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
328 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
329 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
330 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
332 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
333 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
336 l_units -= p_fifo->l_units;
338 vlc_mutex_lock( &p_fifo->data_lock );
339 p_fifo->l_start_frame = p_fifo->l_next_frame;
340 vlc_cond_signal( &p_fifo->data_wait );
341 vlc_mutex_unlock( &p_fifo->data_lock );
343 /* p_fifo->b_start_frame = 1; */
344 p_fifo->l_next_frame += 1;
345 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
346 p_fifo->b_next_frame = 0;
353 intf_DbgMsg("aout debug: unknown fifo type (%i)", p_fifo->i_type);