1 /*****************************************************************************
2 * aout_dummy.c : dummy audio output plugin
3 *****************************************************************************
4 * Copyright (C) 2000, 2001 VideoLAN
5 * $Id: aout_dummy.c,v 1.10 2001/03/21 13:42:33 sam Exp $
7 * Authors: Samuel Hocevar <sam@zoy.org>
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 #define MODULE_NAME dummy
25 #include "modules_inner.h"
27 /*****************************************************************************
29 *****************************************************************************/
33 #include "common.h" /* boolean_t, byte_t */
38 #include "audio_output.h" /* aout_thread_t */
44 /*****************************************************************************
45 * vout_dummy_t: dummy video output method descriptor
46 *****************************************************************************
47 * This structure is part of the video output thread descriptor.
48 * It describes the dummy specific properties of an output thread.
49 *****************************************************************************/
50 typedef struct aout_sys_s
55 /*****************************************************************************
57 *****************************************************************************/
58 static int aout_Probe ( probedata_t *p_data );
59 static int aout_Open ( aout_thread_t *p_aout );
60 static int aout_SetFormat ( aout_thread_t *p_aout );
61 static long aout_GetBufInfo ( aout_thread_t *p_aout, long l_buffer_info );
62 static void aout_Play ( aout_thread_t *p_aout,
63 byte_t *buffer, int i_size );
64 static void aout_Close ( aout_thread_t *p_aout );
66 /*****************************************************************************
67 * Functions exported as capabilities. They are declared as static so that
68 * we don't pollute the namespace too much.
69 *****************************************************************************/
70 void _M( aout_getfunctions )( function_list_t * p_function_list )
72 p_function_list->pf_probe = aout_Probe;
73 p_function_list->functions.aout.pf_open = aout_Open;
74 p_function_list->functions.aout.pf_setformat = aout_SetFormat;
75 p_function_list->functions.aout.pf_getbufinfo = aout_GetBufInfo;
76 p_function_list->functions.aout.pf_play = aout_Play;
77 p_function_list->functions.aout.pf_close = aout_Close;
80 /*****************************************************************************
81 * aout_Probe: probe the audio device and return a score
82 *****************************************************************************/
83 static int aout_Probe( probedata_t *p_data )
85 if( TestMethod( AOUT_METHOD_VAR, "dummy" ) )
90 /* The dummy plugin always works but give it the lower possible score */
94 /*****************************************************************************
95 * aout_Open: opens a dummy audio device
96 *****************************************************************************/
97 static int aout_Open( aout_thread_t *p_aout )
99 /* Initialize some variables */
100 p_aout->i_format = AOUT_FORMAT_DEFAULT;
101 p_aout->i_channels = 1 + main_GetIntVariable( AOUT_STEREO_VAR,
102 AOUT_STEREO_DEFAULT );
103 p_aout->l_rate = main_GetIntVariable( AOUT_RATE_VAR,
109 /*****************************************************************************
110 * aout_SetFormat: pretends to set the dsp output format
111 *****************************************************************************/
112 static int aout_SetFormat( aout_thread_t *p_aout )
117 /*****************************************************************************
118 * aout_GetBufInfo: returns available bytes in buffer
119 *****************************************************************************/
120 static long aout_GetBufInfo( aout_thread_t *p_aout, long l_buffer_limit )
122 return( sizeof(s16) * l_buffer_limit + 1 ); /* value big enough to sleep */
125 /*****************************************************************************
126 * aout_Play: pretends to play a sound
127 *****************************************************************************/
128 static void aout_Play( aout_thread_t *p_aout, byte_t *buffer, int i_size )
133 /*****************************************************************************
134 * aout_Close: closes the dummy audio device
135 *****************************************************************************/
136 static void aout_Close( aout_thread_t *p_aout )