1 /*****************************************************************************
2 * aout_s16.c: 16 bit signed audio output functions
3 *****************************************************************************
4 * Copyright (C) 1999, 2000, 2001 VideoLAN
5 * $Id: aout_s16.c,v 1.2 2001/03/21 13:42:34 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 S16StereoPlay( aout_thread_t * p_aout, aout_fifo_t * p_fifo );
47 /*****************************************************************************
49 *****************************************************************************/
50 void aout_S16MonoThread( aout_thread_t * p_aout )
52 intf_ErrMsg( "aout error: 16 bit signed mono thread unsupported" );
55 void aout_S16StereoThread( aout_thread_t * p_aout )
58 long l_buffer, l_buffer_limit, l_bytes;
60 /* As the s32_buffer was created with calloc(), we don't have to set this
61 * memory to zero and we can immediately jump into the thread's loop */
62 while ( ! p_aout->b_die )
64 vlc_mutex_lock( &p_aout->fifos_lock );
66 for ( i_fifo = 0; i_fifo < AOUT_MAX_FIFOS; i_fifo++ )
68 if( p_aout->fifo[i_fifo].b_die )
70 aout_FreeFifo( &p_aout->fifo[i_fifo] );
74 S16StereoPlay( p_aout, &p_aout->fifo[i_fifo] );
78 vlc_mutex_unlock( &p_aout->fifos_lock );
80 l_buffer_limit = p_aout->l_units << 1; /* p_aout->b_stereo == 1 */
82 for ( l_buffer = 0; l_buffer < l_buffer_limit; l_buffer++ )
84 ((s16 *)p_aout->buffer)[l_buffer] = (s16)( ( p_aout->s32_buffer[l_buffer] / AOUT_MAX_FIFOS ) * p_aout->vol / 256 ) ;
85 p_aout->s32_buffer[l_buffer] = 0;
88 l_bytes = p_aout->pf_getbufinfo( p_aout, l_buffer_limit );
89 p_aout->date = mdate() + ((((mtime_t)(l_bytes / 4)) * 1000000) / ((mtime_t)p_aout->l_rate)); /* sizeof(s16) << (p_aout->b_stereo) == 4 */
90 p_aout->pf_play( p_aout, (byte_t *)p_aout->buffer, l_buffer_limit * sizeof(s16) );
91 if ( l_bytes > (l_buffer_limit * sizeof(s16)) )
93 msleep( p_aout->l_msleep );
97 vlc_mutex_lock( &p_aout->fifos_lock );
99 for ( i_fifo = 0; i_fifo < AOUT_MAX_FIFOS; i_fifo++ )
101 aout_FreeFifo( &p_aout->fifo[i_fifo] );
104 vlc_mutex_unlock( &p_aout->fifos_lock );
107 /* Following functions are local */
109 static void S16StereoPlay( aout_thread_t * p_aout, aout_fifo_t * p_fifo )
112 long l_buffer_limit, l_units;
114 switch ( p_fifo->i_type )
116 case AOUT_EMPTY_FIFO:
120 case AOUT_INTF_MONO_FIFO:
122 if ( p_fifo->l_units > p_aout->l_units )
124 /* p_aout->b_stereo == 1 */
125 while ( l_buffer < (p_aout->l_units << 1) )
127 p_aout->s32_buffer[l_buffer++] +=
128 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
129 p_aout->s32_buffer[l_buffer++] +=
130 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
131 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
133 p_fifo->l_units -= p_aout->l_units;
137 /* p_aout->b_stereo == 1 */
138 while ( l_buffer < (p_fifo->l_units << 1) )
140 p_aout->s32_buffer[l_buffer++] +=
141 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
142 p_aout->s32_buffer[l_buffer++] +=
143 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
144 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
146 free( p_fifo->buffer ); /* !! */
147 p_fifo->i_type = AOUT_EMPTY_FIFO; /* !! */
151 case AOUT_INTF_STEREO_FIFO:
153 if ( p_fifo->l_units > p_aout->l_units )
155 /* p_aout->b_stereo == 1 */
156 while ( l_buffer < (p_aout->l_units << 1) )
158 p_aout->s32_buffer[l_buffer++] +=
159 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
160 p_aout->s32_buffer[l_buffer++] +=
161 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
162 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
164 p_fifo->l_units -= p_aout->l_units;
168 /* p_aout->b_stereo == 1 */
169 while ( l_buffer < (p_fifo->l_units << 1) )
171 p_aout->s32_buffer[l_buffer++] +=
172 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
173 p_aout->s32_buffer[l_buffer++] +=
174 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
175 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
177 free( p_fifo->buffer );
178 p_fifo->i_type = AOUT_EMPTY_FIFO;
182 case AOUT_ADEC_MONO_FIFO:
184 l_units = p_aout->l_units;
185 while ( l_units > 0 )
187 if ( !p_fifo->b_next_frame )
189 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
195 if ( p_fifo->l_units > l_units )
197 /* p_aout->b_stereo == 1 */
198 l_buffer_limit = p_aout->l_units << 1;
200 while ( l_buffer < l_buffer_limit )
202 p_aout->s32_buffer[l_buffer++] +=
203 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
204 p_aout->s32_buffer[l_buffer++] +=
205 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
207 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
208 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
209 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
211 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
212 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
215 p_fifo->l_units -= l_units;
220 /* p_aout->b_stereo == 1 */
221 l_buffer_limit = l_buffer + (p_fifo->l_units << 1);
223 while ( l_buffer < l_buffer_limit )
225 p_aout->s32_buffer[l_buffer++] +=
226 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
227 p_aout->s32_buffer[l_buffer++] +=
228 (s32)( ((s16 *)p_fifo->buffer)[p_fifo->l_unit] );
230 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
231 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 0 */
232 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0)) )
234 p_fifo->l_unit -= /* p_fifo->b_stereo == 0 */
235 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 0));
238 l_units -= p_fifo->l_units;
240 vlc_mutex_lock( &p_fifo->data_lock );
241 p_fifo->l_start_frame = p_fifo->l_next_frame;
242 vlc_cond_signal( &p_fifo->data_wait );
243 vlc_mutex_unlock( &p_fifo->data_lock );
245 /* p_fifo->b_start_frame = 1; */
246 p_fifo->l_next_frame += 1;
247 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
248 p_fifo->b_next_frame = 0;
253 case AOUT_ADEC_STEREO_FIFO:
255 l_units = p_aout->l_units;
256 while ( l_units > 0 )
258 if ( !p_fifo->b_next_frame )
260 if ( NextFrame(p_aout, p_fifo, p_aout->date + ((((mtime_t)(l_buffer >> 1)) * 1000000) / ((mtime_t)p_aout->l_rate))) )
266 if ( p_fifo->l_units > l_units )
268 /* p_aout->b_stereo == 1 */
269 l_buffer_limit = p_aout->l_units << 1;
271 while ( l_buffer < l_buffer_limit )
273 p_aout->s32_buffer[l_buffer++] +=
274 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
275 p_aout->s32_buffer[l_buffer++] +=
276 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
278 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
279 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
280 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
282 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
283 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
286 p_fifo->l_units -= l_units;
291 /* p_aout->b_stereo == 1 */
292 l_buffer_limit = l_buffer + (p_fifo->l_units << 1);
294 while ( l_buffer < l_buffer_limit )
296 p_aout->s32_buffer[l_buffer++] +=
297 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit] );
298 p_aout->s32_buffer[l_buffer++] +=
299 (s32)( ((s16 *)p_fifo->buffer)[2*p_fifo->l_unit+1] );
301 UPDATE_INCREMENT( p_fifo->unit_increment, p_fifo->l_unit )
302 if ( p_fifo->l_unit >= /* p_fifo->b_stereo == 1 */
303 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1)) )
305 p_fifo->l_unit -= /* p_fifo->b_stereo == 1 */
306 ((AOUT_FIFO_SIZE + 1) * (p_fifo->l_frame_size >> 1));
309 l_units -= p_fifo->l_units;
311 vlc_mutex_lock( &p_fifo->data_lock );
312 p_fifo->l_start_frame = p_fifo->l_next_frame;
313 vlc_cond_signal( &p_fifo->data_wait );
314 vlc_mutex_unlock( &p_fifo->data_lock );
316 /* p_fifo->b_start_frame = 1; */
317 p_fifo->l_next_frame += 1;
318 p_fifo->l_next_frame &= AOUT_FIFO_SIZE;
319 p_fifo->b_next_frame = 0;
326 intf_DbgMsg("aout debug: unknown fifo type (%i)", p_fifo->i_type);