1 /*****************************************************************************
2 * aout_beos.cpp: BeOS audio output
3 *****************************************************************************
4 * Copyright (C) 1999, 2000, 2001 VideoLAN
5 * $Id: aout_beos.cpp,v 1.12 2001/02/18 03:32:02 polux Exp $
7 * Authors: Jean-Marc Dressler <polux@via.ecp.fr>
8 * Samuel Hocevar <sam@zoy.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
31 #include <stdlib.h> /* malloc(), free() */
32 #include <kernel/OS.h>
34 #include <Application.h>
37 #include <media/MediaDefs.h>
38 #include <game/PushGameSound.h>
49 #include "audio_output.h"
57 /*****************************************************************************
58 * aout_sys_t: BeOS audio output method descriptor
59 *****************************************************************************
60 * This structure is part of the audio output thread descriptor.
61 * It describes some BeOS specific variables.
62 *****************************************************************************/
63 typedef struct aout_sys_s
65 BPushGameSound * p_sound;
66 gs_audio_format * p_format;
76 /*****************************************************************************
78 *****************************************************************************/
79 static int aout_Probe ( probedata_t *p_data );
80 static int aout_Open ( aout_thread_t *p_aout );
81 static int aout_SetFormat ( aout_thread_t *p_aout );
82 static long aout_GetBufInfo ( aout_thread_t *p_aout, long l_buffer_info );
83 static void aout_Play ( aout_thread_t *p_aout,
84 byte_t *buffer, int i_size );
85 static void aout_Close ( aout_thread_t *p_aout );
87 /*****************************************************************************
88 * Functions exported as capabilities. They are declared as static so that
89 * we don't pollute the namespace too much.
90 *****************************************************************************/
91 void aout_getfunctions( function_list_t * p_function_list )
93 p_function_list->pf_probe = aout_Probe;
94 p_function_list->functions.aout.pf_open = aout_Open;
95 p_function_list->functions.aout.pf_setformat = aout_SetFormat;
96 p_function_list->functions.aout.pf_getbufinfo = aout_GetBufInfo;
97 p_function_list->functions.aout.pf_play = aout_Play;
98 p_function_list->functions.aout.pf_close = aout_Close;
101 /*****************************************************************************
102 * aout_Probe: probe the audio device and return a score
103 *****************************************************************************/
104 static int aout_Probe( probedata_t *p_data )
106 /* We don't test anything since I don't know what to test. However
107 * if the module could be loaded it is quite likely to work. */
111 /*****************************************************************************
112 * aout_Open: opens a BPushGameSound
113 *****************************************************************************/
114 static int aout_Open( aout_thread_t *p_aout )
116 /* Allocate structure */
117 p_aout->p_sys = (aout_sys_t*) malloc( sizeof( aout_sys_t ) );
118 if( p_aout->p_sys == NULL )
120 intf_ErrMsg("error: %s", strerror(ENOMEM) );
124 /* Allocate gs_audio_format */
125 p_aout->p_sys->p_format = (gs_audio_format *) malloc( sizeof( gs_audio_format ) );
126 if( p_aout->p_sys->p_format == NULL )
128 free( p_aout->p_sys );
129 intf_ErrMsg("error: cannot allocate memory for gs_audio_format" );
133 /* Initialize some variables */
134 p_aout->i_format = AOUT_FORMAT_DEFAULT;
135 p_aout->i_channels = 1 + main_GetIntVariable( AOUT_STEREO_VAR,
136 AOUT_STEREO_DEFAULT );
137 p_aout->l_rate = main_GetIntVariable( AOUT_RATE_VAR, AOUT_RATE_DEFAULT );
139 p_aout->p_sys->p_format->frame_rate = 44100.0;
140 p_aout->p_sys->p_format->channel_count = p_aout->i_channels;
141 p_aout->p_sys->p_format->format = gs_audio_format::B_GS_S16;
142 p_aout->p_sys->p_format->byte_order = B_MEDIA_LITTLE_ENDIAN;
143 p_aout->p_sys->p_format->buffer_size = 4*8192;
144 p_aout->p_sys->i_buffer_pos = 0;
146 /* Allocate BPushGameSound */
147 p_aout->p_sys->p_sound = new BPushGameSound( 8192,
148 p_aout->p_sys->p_format,
150 if( p_aout->p_sys->p_sound == NULL )
152 free( p_aout->p_sys->p_format );
153 free( p_aout->p_sys );
154 intf_ErrMsg("error: cannot allocate memory for BPushGameSound" );
158 if( p_aout->p_sys->p_sound->InitCheck() != B_OK )
160 free( p_aout->p_sys->p_format );
161 free( p_aout->p_sys );
162 intf_ErrMsg("error: cannot allocate memory for BPushGameSound" );
166 p_aout->p_sys->p_sound->StartPlaying( );
168 p_aout->p_sys->p_sound->LockForCyclic( &p_aout->p_sys->p_buffer,
169 (size_t *)&p_aout->p_sys->i_buffer_size );
174 /*****************************************************************************
175 * aout_SetFormat: sets the dsp output format
176 *****************************************************************************/
177 static int aout_SetFormat( aout_thread_t *p_aout )
182 /*****************************************************************************
183 * aout_GetBufInfo: buffer status query
184 *****************************************************************************/
185 static long aout_GetBufInfo( aout_thread_t *p_aout, long l_buffer_limit )
187 /* Each value is 4 bytes long (stereo signed 16 bits) */
188 long i_hard_pos = 4 * p_aout->p_sys->p_sound->CurrentPosition();
190 i_hard_pos = p_aout->p_sys->i_buffer_pos - i_hard_pos;
193 i_hard_pos += p_aout->p_sys->i_buffer_size;
196 return( i_hard_pos );
199 /*****************************************************************************
200 * aout_Play: plays a sound samples buffer
201 *****************************************************************************
202 * This function writes a buffer of i_length bytes in the dsp
203 *****************************************************************************/
204 static void aout_Play( aout_thread_t *p_aout, byte_t *buffer, int i_size )
208 if( (i_newbuf_pos = p_aout->p_sys->i_buffer_pos + i_size)
209 > p_aout->p_sys->i_buffer_size )
211 memcpy( (void *)((int)p_aout->p_sys->p_buffer
212 + p_aout->p_sys->i_buffer_pos),
214 p_aout->p_sys->i_buffer_size - p_aout->p_sys->i_buffer_pos );
216 memcpy( (void *)((int)p_aout->p_sys->p_buffer),
217 buffer + p_aout->p_sys->i_buffer_size - p_aout->p_sys->i_buffer_pos,
218 i_size - ( p_aout->p_sys->i_buffer_size
219 - p_aout->p_sys->i_buffer_pos ) );
221 p_aout->p_sys->i_buffer_pos = i_newbuf_pos - p_aout->p_sys->i_buffer_size;
226 memcpy( (void *)((int)p_aout->p_sys->p_buffer + p_aout->p_sys->i_buffer_pos),
229 p_aout->p_sys->i_buffer_pos = i_newbuf_pos;
233 /*****************************************************************************
234 * aout_Close: closes the dsp audio device
235 *****************************************************************************/
236 static void aout_Close( aout_thread_t *p_aout )
238 p_aout->p_sys->p_sound->UnlockCyclic();
239 p_aout->p_sys->p_sound->StopPlaying( );
240 delete p_aout->p_sys->p_sound;
241 free( p_aout->p_sys->p_format );
242 free( p_aout->p_sys );