1 /*****************************************************************************
2 * audio_output.h : audio output interface
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
5 * $Id: audio_output.h,v 1.86 2003/11/20 22:10:55 fenrir 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 *****************************************************************************/
23 #ifndef _VLC_AUDIO_OUTPUT_H
24 #define _VLC_AUDIO_OUTPUT_H 1
28 #define AOUT_FMTS_IDENTICAL( p_first, p_second ) ( \
29 ((p_first)->i_format == (p_second)->i_format) \
30 && ((p_first)->i_rate == (p_second)->i_rate) \
31 && ((p_first)->i_physical_channels == (p_second)->i_physical_channels)\
32 && ((p_first)->i_original_channels == (p_second)->i_original_channels) )
34 /* Check if i_rate == i_rate and i_channels == i_channels */
35 #define AOUT_FMTS_SIMILAR( p_first, p_second ) ( \
36 ((p_first)->i_rate == (p_second)->i_rate) \
37 && ((p_first)->i_physical_channels == (p_second)->i_physical_channels)\
38 && ((p_first)->i_original_channels == (p_second)->i_original_channels) )
40 #ifdef WORDS_BIGENDIAN
41 # define AOUT_FMT_S16_NE VLC_FOURCC('s','1','6','b')
42 # define AOUT_FMT_U16_NE VLC_FOURCC('u','1','6','b')
44 # define AOUT_FMT_S16_NE VLC_FOURCC('s','1','6','l')
45 # define AOUT_FMT_U16_NE VLC_FOURCC('u','1','6','l')
48 #define AOUT_FMT_NON_LINEAR( p_format ) \
49 ( ((p_format)->i_format == VLC_FOURCC('s','p','d','i')) \
50 || ((p_format)->i_format == VLC_FOURCC('a','5','2',' ')) \
51 || ((p_format)->i_format == VLC_FOURCC('d','t','s',' ')) )
53 /* This is heavily borrowed from libmad, by Robert Leslie <rob@mars.org> */
55 * Fixed-point format: 0xABBBBBBB
56 * A == whole part (sign + 3 bits)
57 * B == fractional part (28 bits)
59 * Values are signed two's complement, so the effective range is:
60 * 0x80000000 to 0x7fffffff
61 * -8.0 to +7.9999999962747097015380859375
63 * The smallest representable value is:
64 * 0x00000001 == 0.0000000037252902984619140625 (i.e. about 3.725e-9)
66 * 28 bits of fractional accuracy represent about
67 * 8.6 digits of decimal accuracy.
69 * Fixed-point numbers can be added or subtracted as normal
70 * integers, but multiplication requires shifting the 64-bit result
71 * from 56 fractional bits back to 28 (and rounding.)
73 typedef int32_t vlc_fixed_t;
74 #define FIXED32_FRACBITS 28
75 #define FIXED32_MIN ((vlc_fixed_t) -0x80000000L)
76 #define FIXED32_MAX ((vlc_fixed_t) +0x7fffffffL)
77 #define FIXED32_ONE ((vlc_fixed_t) 0x10000000)
81 * Channels descriptions
84 /* Values available for physical and original channels */
85 #define AOUT_CHAN_CENTER 0x1
86 #define AOUT_CHAN_LEFT 0x2
87 #define AOUT_CHAN_RIGHT 0x4
88 #define AOUT_CHAN_REARCENTER 0x10
89 #define AOUT_CHAN_REARLEFT 0x20
90 #define AOUT_CHAN_REARRIGHT 0x40
91 #define AOUT_CHAN_MIDDLELEFT 0x100
92 #define AOUT_CHAN_MIDDLERIGHT 0x200
93 #define AOUT_CHAN_LFE 0x1000
95 /* Values available for original channels only */
96 #define AOUT_CHAN_DOLBYSTEREO 0x10000
97 #define AOUT_CHAN_DUALMONO 0x20000
98 #define AOUT_CHAN_REVERSESTEREO 0x40000
100 #define AOUT_CHAN_PHYSMASK 0xFFFF
102 /* Values used for the audio-device and audio-channels object variables */
103 #define AOUT_VAR_MONO 1
104 #define AOUT_VAR_STEREO 2
105 #define AOUT_VAR_2F2R 4
106 #define AOUT_VAR_3F2R 5
107 #define AOUT_VAR_5_1 6
108 #define AOUT_VAR_6_1 7
109 #define AOUT_VAR_7_1 8
110 #define AOUT_VAR_SPDIF 10
112 #define AOUT_VAR_CHAN_STEREO 1
113 #define AOUT_VAR_CHAN_RSTEREO 2
114 #define AOUT_VAR_CHAN_LEFT 3
115 #define AOUT_VAR_CHAN_RIGHT 4
116 #define AOUT_VAR_CHAN_DOLBYS 5
118 /*****************************************************************************
119 * aout_buffer_t : audio output buffer
120 *****************************************************************************/
125 /* i_size is the real size of the buffer (used for debug ONLY), i_nb_bytes
126 * is the number of significative bytes in it. */
127 size_t i_size, i_nb_bytes;
128 unsigned int i_nb_samples;
129 mtime_t start_date, end_date;
131 struct aout_buffer_t * p_next;
134 /* Size of a frame for S/PDIF output. */
135 #define AOUT_SPDIF_SIZE 6144
137 /* Number of samples in an A/52 frame. */
138 #define A52_FRAME_NB 1536
140 /*****************************************************************************
141 * audio_date_t : date incrementation without long-term rounding errors
142 *****************************************************************************/
147 uint32_t i_remainder;
150 /*****************************************************************************
152 *****************************************************************************/
153 /* From common.c : */
154 #define aout_New(a) __aout_New(VLC_OBJECT(a))
155 VLC_EXPORT( aout_instance_t *, __aout_New, ( vlc_object_t * ) );
156 VLC_EXPORT( void, aout_Delete, ( aout_instance_t * ) );
157 VLC_EXPORT( void, aout_DateInit, ( audio_date_t *, uint32_t ) );
158 VLC_EXPORT( void, aout_DateSet, ( audio_date_t *, mtime_t ) );
159 VLC_EXPORT( void, aout_DateMove, ( audio_date_t *, mtime_t ) );
160 VLC_EXPORT( mtime_t, aout_DateGet, ( const audio_date_t * ) );
161 VLC_EXPORT( mtime_t, aout_DateIncrement, ( audio_date_t *, uint32_t ) );
164 #define aout_DecNew(a, b, c) __aout_DecNew(VLC_OBJECT(a), b, c)
165 VLC_EXPORT( aout_input_t *, __aout_DecNew, ( vlc_object_t *, aout_instance_t **, audio_sample_format_t * ) );
166 VLC_EXPORT( int, aout_DecDelete, ( aout_instance_t *, aout_input_t * ) );
167 VLC_EXPORT( aout_buffer_t *, aout_DecNewBuffer, ( aout_instance_t *, aout_input_t *, size_t ) );
168 VLC_EXPORT( void, aout_DecDeleteBuffer, ( aout_instance_t *, aout_input_t *, aout_buffer_t * ) );
169 VLC_EXPORT( int, aout_DecPlay, ( aout_instance_t *, aout_input_t *, aout_buffer_t * ) );
172 #define aout_VolumeGet(a, b) __aout_VolumeGet(VLC_OBJECT(a), b)
173 VLC_EXPORT( int, __aout_VolumeGet, ( vlc_object_t *, audio_volume_t * ) );
174 #define aout_VolumeSet(a, b) __aout_VolumeSet(VLC_OBJECT(a), b)
175 VLC_EXPORT( int, __aout_VolumeSet, ( vlc_object_t *, audio_volume_t ) );
176 #define aout_VolumeInfos(a, b) __aout_VolumeInfos(VLC_OBJECT(a), b)
177 VLC_EXPORT( int, __aout_VolumeInfos, ( vlc_object_t *, audio_volume_t * ) );
178 #define aout_VolumeUp(a, b, c) __aout_VolumeUp(VLC_OBJECT(a), b, c)
179 VLC_EXPORT( int, __aout_VolumeUp, ( vlc_object_t *, int, audio_volume_t * ) );
180 #define aout_VolumeDown(a, b, c) __aout_VolumeDown(VLC_OBJECT(a), b, c)
181 VLC_EXPORT( int, __aout_VolumeDown, ( vlc_object_t *, int, audio_volume_t * ) );
182 #define aout_VolumeMute(a, b) __aout_VolumeMute(VLC_OBJECT(a), b)
183 VLC_EXPORT( int, __aout_VolumeMute, ( vlc_object_t *, audio_volume_t * ) );
184 VLC_EXPORT( int, aout_Restart, ( aout_instance_t * p_aout ) );
185 VLC_EXPORT( int, aout_FindAndRestart, ( vlc_object_t *, const char *, vlc_value_t, vlc_value_t, void * ) );
186 VLC_EXPORT( int, aout_ChannelsRestart, ( vlc_object_t *, const char *, vlc_value_t, vlc_value_t, void * ) );
188 #endif /* _VLC_AUDIO_OUTPUT_H */