1 /*****************************************************************************
2 * aout_dummy.c : dummy audio output plugin
3 *****************************************************************************
4 * Copyright (C) 2000 VideoLAN
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 *****************************************************************************/
29 #include "common.h" /* boolean_t, byte_t */
34 #include "audio_output.h" /* aout_thread_t */
40 /*****************************************************************************
41 * vout_dummy_t: dummy video output method descriptor
42 *****************************************************************************
43 * This structure is part of the video output thread descriptor.
44 * It describes the dummy specific properties of an output thread.
45 *****************************************************************************/
46 typedef struct aout_sys_s
51 /*****************************************************************************
53 *****************************************************************************/
54 static int aout_Probe ( probedata_t *p_data );
55 static int aout_Open ( aout_thread_t *p_aout );
56 static int aout_SetFormat ( aout_thread_t *p_aout );
57 static long aout_GetBufInfo ( aout_thread_t *p_aout, long l_buffer_info );
58 static void aout_Play ( aout_thread_t *p_aout,
59 byte_t *buffer, int i_size );
60 static void aout_Close ( aout_thread_t *p_aout );
62 /*****************************************************************************
63 * Functions exported as capabilities. They are declared as static so that
64 * we don't pollute the namespace too much.
65 *****************************************************************************/
66 void aout_getfunctions( function_list_t * p_function_list )
68 p_function_list->pf_probe = aout_Probe;
69 p_function_list->functions.aout.pf_open = aout_Open;
70 p_function_list->functions.aout.pf_setformat = aout_SetFormat;
71 p_function_list->functions.aout.pf_getbufinfo = aout_GetBufInfo;
72 p_function_list->functions.aout.pf_play = aout_Play;
73 p_function_list->functions.aout.pf_close = aout_Close;
76 /*****************************************************************************
77 * aout_Probe: probe the audio device and return a score
78 *****************************************************************************/
79 static int aout_Probe( probedata_t *p_data )
81 if( TestMethod( AOUT_METHOD_VAR, "dummy" ) )
86 /* The dummy plugin always works but give it the lower possible score */
90 /*****************************************************************************
91 * aout_Open: opens a dummy audio device
92 *****************************************************************************/
93 static int aout_Open( aout_thread_t *p_aout )
95 /* Initialize some variables */
96 p_aout->i_format = AOUT_FORMAT_DEFAULT;
97 p_aout->i_channels = 1 + main_GetIntVariable( AOUT_STEREO_VAR, AOUT_STEREO_DEFAULT );
98 p_aout->l_rate = main_GetIntVariable( AOUT_RATE_VAR, AOUT_RATE_DEFAULT );
103 /*****************************************************************************
104 * aout_SetFormat: pretends to set the dsp output format
105 *****************************************************************************/
106 static int aout_SetFormat( aout_thread_t *p_aout )
111 /*****************************************************************************
112 * aout_GetBufInfo: returns available bytes in buffer
113 *****************************************************************************/
114 static long aout_GetBufInfo( aout_thread_t *p_aout, long l_buffer_limit )
116 return( sizeof(s16) * l_buffer_limit + 1 ); /* value big enough to sleep */
119 /*****************************************************************************
120 * aout_Play: pretends to play a sound
121 *****************************************************************************/
122 static void aout_Play( aout_thread_t *p_aout, byte_t *buffer, int i_size )
127 /*****************************************************************************
128 * aout_Close: closes the dummy audio device
129 *****************************************************************************/
130 static void aout_Close( aout_thread_t *p_aout )