1 /*****************************************************************************
2 * aout_dummy.c : dummy audio output plugin
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
5 * $Id: aout.c,v 1.6 2002/08/19 23:12:57 massiot Exp $
7 * Authors: Christophe Massiot <massiot@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 *****************************************************************************/
33 #include "aout_internal.h"
35 #define FRAME_SIZE 2048
36 #define A52_FRAME_NB 1536
38 /*****************************************************************************
40 *****************************************************************************/
41 static int SetFormat ( aout_instance_t * );
42 static void Play ( aout_instance_t * );
44 /*****************************************************************************
45 * OpenAudio: open a dummy audio device
46 *****************************************************************************/
47 int E_(OpenAudio) ( vlc_object_t * p_this )
49 aout_instance_t * p_aout = (aout_instance_t *)p_this;
51 p_aout->output.pf_setformat = SetFormat;
52 p_aout->output.pf_play = Play;
57 /*****************************************************************************
58 * SetFormat: pretend to set the dsp output format
59 *****************************************************************************/
60 static int SetFormat( aout_instance_t * p_aout )
62 if ( p_aout->output.output.i_format == AOUT_FMT_SPDIF )
64 p_aout->output.i_nb_samples = A52_FRAME_NB;
65 p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
66 p_aout->output.output.i_frame_length = A52_FRAME_NB;
70 p_aout->output.i_nb_samples = FRAME_SIZE;
75 /*****************************************************************************
76 * Play: pretend to play a sound
77 *****************************************************************************/
78 static void Play( aout_instance_t * p_aout )
80 /* We don't need the mixer lock, since Play is entered _with_ the
82 aout_buffer_t * p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
83 aout_BufferFree( p_buffer );