1 /*****************************************************************************
2 * audio_output.h : audio output interface
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
5 * $Id: audio_output.h,v 1.53 2002/08/08 00:35:10 sam 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 /*****************************************************************************
25 * audio_sample_format_t
26 *****************************************************************************
27 * This structure defines a format for audio samples.
28 *****************************************************************************/
29 struct audio_sample_format_t
36 #define AOUT_FMT_MU_LAW 0x00000001
37 #define AOUT_FMT_A_LAW 0x00000002
38 #define AOUT_FMT_IMA_ADPCM 0x00000004
39 #define AOUT_FMT_U8 0x00000008
40 #define AOUT_FMT_S16_LE 0x00000010 /* Little endian signed 16 */
41 #define AOUT_FMT_S16_BE 0x00000020 /* Big endian signed 16 */
42 #define AOUT_FMT_S8 0x00000040
43 #define AOUT_FMT_U16_LE 0x00000080 /* Little endian U16 */
44 #define AOUT_FMT_U16_BE 0x00000100 /* Big endian U16 */
45 #define AOUT_FMT_A52 0x00000400 /* ATSC A/52 (for SP/DIF) */
46 #define AOUT_FMT_FLOAT32 0x00000800
47 #define AOUT_FMT_FIXED32 0x00001000
49 #define AOUT_FMTS_IDENTICAL( p_first, p_second ) ( \
50 (p_first->i_format == p_second->i_format) \
51 && (p_first->i_rate == p_second->i_rate) \
52 && (p_first->i_channels == p_second->i_channels \
53 || p_first->i_channels == -1 || p_second->i_channels == -1) )
55 #ifdef WORDS_BIGENDIAN
56 # define AOUT_FMT_S16_NE AOUT_FMT_S16_BE
57 # define AOUT_FMT_U16_NE AOUT_FMT_U16_BE
59 # define AOUT_FMT_S16_NE AOUT_FMT_S16_LE
60 # define AOUT_FMT_U16_NE AOUT_FMT_U16_LE
63 /*****************************************************************************
64 * aout_buffer_t : audio output buffer
65 *****************************************************************************/
72 mtime_t start_date, end_date;
74 struct aout_buffer_t * p_next;
77 /*****************************************************************************
79 *****************************************************************************/
80 /* From audio_output.c : */
81 #define aout_NewInstance(a) __aout_NewInstance(VLC_OBJECT(a))
82 VLC_EXPORT( aout_instance_t *, __aout_NewInstance, ( vlc_object_t * ) );
83 VLC_EXPORT( void, aout_DeleteInstance, ( aout_instance_t * ) );
84 VLC_EXPORT( aout_buffer_t *, aout_BufferNew, ( aout_instance_t *, aout_input_t *, size_t ) );
85 VLC_EXPORT( void, aout_BufferDelete, ( aout_instance_t *, aout_input_t *, aout_buffer_t * ) );
86 VLC_EXPORT( void, aout_BufferPlay, ( aout_instance_t *, aout_input_t *, aout_buffer_t * ) );
87 VLC_EXPORT( int, aout_FormatToBytes, ( audio_sample_format_t * p_format ) );
90 #define aout_InputNew(a,b,c) __aout_InputNew(VLC_OBJECT(a),b,c)
91 VLC_EXPORT( aout_input_t *, __aout_InputNew, ( vlc_object_t *, aout_instance_t **, audio_sample_format_t * ) );
92 VLC_EXPORT( void, aout_InputDelete, ( aout_instance_t *, aout_input_t * ) );
95 VLC_EXPORT( aout_buffer_t *, aout_OutputNextBuffer, ( aout_instance_t *, mtime_t ) );