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] = (s16)( ( p_aout->s32_buffer[l_buffer] / AOUT_MAX_FIFOS ) * p_aout->vol / 256 ) ;
84 p_aout->s32_buffer[l_buffer] = 0;
87 l_bytes = p_aout->pf_getbufinfo( p_aout, l_buffer_limit );
88 p_aout->date = mdate() + ((((mtime_t)(l_bytes / 4)) * 1000000) / ((mtime_t)p_aout->l_rate)); /* sizeof(s16) << (p_aout->b_stereo) == 4 */
89 p_aout->pf_play( p_aout, (byte_t *)p_aout->buffer, l_buffer_limit * sizeof(s16) );
90 if ( l_bytes > (l_buffer_limit * sizeof(s16)) )
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 /* Following functions are local */
108 static void S16StereoPlay( aout_thread_t * p_aout, aout_fifo_t * p_fifo )
111 long l_buffer_limit, l_units;
113 switch ( p_fifo->i_type )
115 case AOUT_EMPTY_FIFO:
119 case AOUT_INTF_MONO_FIFO:
121 if ( p_fifo->l_units > p_aout->l_units )
123 /* p_aout->b_stereo == 1 */
124 while ( l_buffer < (p_aout->l_units << 1) )
126 p_aout->s32_buffer[l_buffer++] +=
127 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
128 p_aout->s32_buffer[l_buffer++] +=
129 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
130 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
132 p_fifo->l_units -= p_aout->l_units;
136 /* p_aout->b_stereo == 1 */
137 while ( l_buffer < (p_fifo->l_units << 1) )
139 p_aout->s32_buffer[l_buffer++] +=
140 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
141 p_aout->s32_buffer[l_buffer++] +=
142 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
143 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
145 free( p_fifo->buffer ); /* !! */
146 p_fifo->i_type = AOUT_EMPTY_FIFO; /* !! */
150 case AOUT_INTF_STEREO_FIFO:
152 if ( p_fifo->l_units > p_aout->l_units )
154 /* p_aout->b_stereo == 1 */
155 while ( l_buffer < (p_aout->l_units << 1) )
157 p_aout->s32_buffer[l_buffer++] +=
158 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
159 p_aout->s32_buffer[l_buffer++] +=
160 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
161 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
163 p_fifo->l_units -= p_aout->l_units;
167 /* p_aout->b_stereo == 1 */
168 while ( l_buffer < (p_fifo->l_units << 1) )
170 p_aout->s32_buffer[l_buffer++] +=
171 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
172 p_aout->s32_buffer[l_buffer++] +=
173 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
174 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
176 free( p_fifo->buffer );
177 p_fifo->i_type = AOUT_EMPTY_FIFO;
181 case AOUT_ADEC_MONO_FIFO:
183 l_units = p_aout->l_units;
184 while ( l_units > 0 )
186 if ( !p_fifo->b_next_frame )
188 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
194 if ( p_fifo->l_units > l_units )
196 /* p_aout->b_stereo == 1 */
197 l_buffer_limit = p_aout->l_units << 1;
199 while ( l_buffer < l_buffer_limit )
201 p_aout->s32_buffer[l_buffer++] +=
202 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
203 p_aout->s32_buffer[l_buffer++] +=
204 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
206 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
207 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
208 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
210 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
211 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
214 p_fifo->l_units -= l_units;
219 /* p_aout->b_stereo == 1 */
220 l_buffer_limit = l_buffer + (p_fifo->l_units << 1);
222 while ( l_buffer < l_buffer_limit )
224 p_aout->s32_buffer[l_buffer++] +=
225 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
226 p_aout->s32_buffer[l_buffer++] +=
227 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
229 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
230 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
231 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
233 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
234 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
237 l_units -= p_fifo->l_units;
239 vlc_mutex_lock( &p_fifo->data_lock );
240 p_fifo->l_start_frame = p_fifo->l_next_frame;
241 vlc_cond_signal( &p_fifo->data_wait );
242 vlc_mutex_unlock( &p_fifo->data_lock );
244 /* p_fifo->b_start_frame = 1; */
245 p_fifo->l_next_frame += 1;
246 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
247 p_fifo->b_next_frame = 0;
252 case AOUT_ADEC_STEREO_FIFO:
254 l_units = p_aout->l_units;
255 while ( l_units > 0 )
257 if ( !p_fifo->b_next_frame )
259 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
265 if ( p_fifo->l_units > l_units )
267 /* p_aout->b_stereo == 1 */
268 l_buffer_limit = p_aout->l_units << 1;
270 while ( l_buffer < l_buffer_limit )
272 p_aout->s32_buffer[l_buffer++] +=
273 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
274 p_aout->s32_buffer[l_buffer++] +=
275 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
277 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
278 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
279 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
281 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
282 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
285 p_fifo->l_units -= l_units;
290 /* p_aout->b_stereo == 1 */
291 l_buffer_limit = l_buffer + (p_fifo->l_units << 1);
293 while ( l_buffer < l_buffer_limit )
295 p_aout->s32_buffer[l_buffer++] +=
296 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
297 p_aout->s32_buffer[l_buffer++] +=
298 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
300 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
301 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
302 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
304 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
305 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
308 l_units -= p_fifo->l_units;
310 vlc_mutex_lock( &p_fifo->data_lock );
311 p_fifo->l_start_frame = p_fifo->l_next_frame;
312 vlc_cond_signal( &p_fifo->data_wait );
313 vlc_mutex_unlock( &p_fifo->data_lock );
315 /* p_fifo->b_start_frame = 1; */
316 p_fifo->l_next_frame += 1;
317 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
318 p_fifo->b_next_frame = 0;
325 intf_DbgMsg("aout debug: unknown fifo type (%i)", p_fifo->i_type);