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 *****************************************************************************/
35 /*****************************************************************************
37 *****************************************************************************/
38 static int Create ( vlc_object_t * );
40 static void DoWork ( aout_instance_t *, aout_buffer_t * );
42 /*****************************************************************************
44 *****************************************************************************/
46 set_category( CAT_AUDIO );
47 set_subcategory( SUBCAT_AUDIO_MISC );
48 set_description( _("Dummy S/PDIF audio mixer") );
49 set_capability( "audio mixer", 1 );
50 set_callbacks( Create, NULL );
53 /*****************************************************************************
54 * Create: allocate spdif mixer
55 *****************************************************************************/
56 static int Create( vlc_object_t *p_this )
58 aout_instance_t * p_aout = (aout_instance_t *)p_this;
60 if ( !AOUT_FMT_NON_LINEAR(&p_aout->mixer.mixer) )
65 p_aout->mixer.pf_do_work = DoWork;
66 /* This is a bit kludgy - do not ask for a new buffer, since the one
67 * provided by the first input will be good enough. */
68 p_aout->mixer.output_alloc.i_alloc_type = AOUT_ALLOC_NONE;
73 /*****************************************************************************
74 * DoWork: mix a new output buffer - this does nothing, indeed
75 *****************************************************************************/
76 static void DoWork( aout_instance_t * p_aout, aout_buffer_t * p_buffer )
79 aout_input_t * p_input = p_aout->pp_inputs[i];
80 while ( p_input->b_error )
82 p_input = p_aout->pp_inputs[++i];
84 aout_FifoPop( p_aout, &p_input->fifo );
86 /* Empty other FIFOs to avoid a memory leak. */
87 for ( i++; i < p_aout->i_nb_inputs; i++ )
90 aout_buffer_t * p_deleted;
92 p_input = p_aout->pp_inputs[i];
93 if ( p_input->b_error ) continue;
94 p_fifo = &p_input->fifo;
95 p_deleted = p_fifo->p_first;
96 while ( p_deleted != NULL )
98 aout_buffer_t * p_next = p_deleted->p_next;
99 aout_BufferFree( p_deleted );
102 p_fifo->p_first = NULL;
103 p_fifo->pp_last = &p_fifo->p_first;