1 /*****************************************************************************
2 * spdif.c : dummy mixer for S/PDIF output (1 input only)
3 *****************************************************************************
4 * Copyright (C) 2002 the VideoLAN team
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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
36 /*****************************************************************************
38 *****************************************************************************/
39 static int Create ( vlc_object_t * );
41 static void DoWork ( aout_mixer_t *, aout_buffer_t * );
43 /*****************************************************************************
45 *****************************************************************************/
47 set_category( CAT_AUDIO )
48 set_subcategory( SUBCAT_AUDIO_MISC )
49 set_description( N_("Dummy S/PDIF audio mixer") )
50 set_capability( "audio mixer", 1 )
51 set_callbacks( Create, NULL )
54 /*****************************************************************************
55 * Create: allocate spdif mixer
56 *****************************************************************************/
57 static int Create( vlc_object_t *p_this )
59 aout_mixer_t *p_mixer = (aout_mixer_t *)p_this;
61 if ( !AOUT_FMT_NON_LINEAR(&p_mixer->fmt) )
66 p_mixer->mix = DoWork;
67 /* This is a bit kludgy - do not ask for a new buffer, since the one
68 * provided by the first input will be good enough. */
69 p_mixer->allocation.b_alloc = false;
74 /*****************************************************************************
75 * DoWork: mix a new output buffer - this does nothing, indeed
76 *****************************************************************************/
77 static void DoWork( aout_mixer_t * p_mixer, aout_buffer_t * p_buffer )
79 VLC_UNUSED( p_buffer );
82 aout_mixer_input_t * p_input = p_mixer->input[i];
83 while ( p_input->is_invalid )
84 p_input = p_mixer->input[++i];
86 aout_buffer_t * p_old_buffer = aout_FifoPop( NULL, &p_input->fifo );
87 aout_BufferFree( p_old_buffer );
89 /* Empty other FIFOs to avoid a memory leak. */
90 for ( i++; i < p_mixer->input_count; i++ )
92 p_input = p_mixer->input[i];
93 if ( p_input->is_invalid )
95 while ((p_old_buffer = aout_FifoPop( NULL, &p_input->fifo )))
96 aout_BufferFree( p_old_buffer );