1 /*****************************************************************************
2 * aout_dummy.c : dummy audio output plugin
3 *****************************************************************************
4 * Copyright (C) 2000, 2001 VideoLAN
6 * Authors: Samuel Hocevar <sam@zoy.org>
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 #define MODULE_NAME dummy
24 #include "modules_inner.h"
26 /*****************************************************************************
28 *****************************************************************************/
32 #include "common.h" /* boolean_t, byte_t */
37 #include "audio_output.h" /* aout_thread_t */
43 /*****************************************************************************
44 * vout_dummy_t: dummy video output method descriptor
45 *****************************************************************************
46 * This structure is part of the video output thread descriptor.
47 * It describes the dummy specific properties of an output thread.
48 *****************************************************************************/
49 typedef struct aout_sys_s
54 /*****************************************************************************
56 *****************************************************************************/
57 static int aout_Probe ( probedata_t *p_data );
58 static int aout_Open ( aout_thread_t *p_aout );
59 static int aout_SetFormat ( aout_thread_t *p_aout );
60 static long aout_GetBufInfo ( aout_thread_t *p_aout, long l_buffer_info );
61 static void aout_Play ( aout_thread_t *p_aout,
62 byte_t *buffer, int i_size );
63 static void aout_Close ( aout_thread_t *p_aout );
65 /*****************************************************************************
66 * Functions exported as capabilities. They are declared as static so that
67 * we don't pollute the namespace too much.
68 *****************************************************************************/
69 void _M( aout_getfunctions )( function_list_t * p_function_list )
71 p_function_list->pf_probe = aout_Probe;
72 p_function_list->functions.aout.pf_open = aout_Open;
73 p_function_list->functions.aout.pf_setformat = aout_SetFormat;
74 p_function_list->functions.aout.pf_getbufinfo = aout_GetBufInfo;
75 p_function_list->functions.aout.pf_play = aout_Play;
76 p_function_list->functions.aout.pf_close = aout_Close;
79 /*****************************************************************************
80 * aout_Probe: probe the audio device and return a score
81 *****************************************************************************/
82 static int aout_Probe( probedata_t *p_data )
84 if( TestMethod( AOUT_METHOD_VAR, "dummy" ) )
89 /* The dummy plugin always works but give it the lower possible score */
93 /*****************************************************************************
94 * aout_Open: opens a dummy audio device
95 *****************************************************************************/
96 static int aout_Open( aout_thread_t *p_aout )
98 /* Initialize some variables */
99 p_aout->i_format = AOUT_FORMAT_DEFAULT;
100 p_aout->i_channels = 1 + main_GetIntVariable( AOUT_STEREO_VAR,
101 AOUT_STEREO_DEFAULT );
102 p_aout->l_rate = main_GetIntVariable( AOUT_RATE_VAR,
108 /*****************************************************************************
109 * aout_SetFormat: pretends to set the dsp output format
110 *****************************************************************************/
111 static int aout_SetFormat( aout_thread_t *p_aout )
116 /*****************************************************************************
117 * aout_GetBufInfo: returns available bytes in buffer
118 *****************************************************************************/
119 static long aout_GetBufInfo( aout_thread_t *p_aout, long l_buffer_limit )
121 return( sizeof(s16) * l_buffer_limit + 1 ); /* value big enough to sleep */
124 /*****************************************************************************
125 * aout_Play: pretends to play a sound
126 *****************************************************************************/
127 static void aout_Play( aout_thread_t *p_aout, byte_t *buffer, int i_size )
132 /*****************************************************************************
133 * aout_Close: closes the dummy audio device
134 *****************************************************************************/
135 static void aout_Close( aout_thread_t *p_aout )