Mercurial > sdl-ios-xcode

annotate include/SDL_audio.h @ 3279:fd207dce9f94

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
I think this fixes the texture pixel alignment
author Sam Lantinga <slouken@libsdl.org>
date Sat, 19 Sep 2009 12:48:52 +0000
parents f3dcf04412cf
children d3baf5ac4e37
rev   line source
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
1 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
2 SDL - Simple DirectMedia Layer
2859
99210400e8b9 Updated copyright date
Sam Lantinga <slouken@libsdl.org>
parents: 2720
diff changeset
3 Copyright (C) 1997-2009 Sam Lantinga
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
4
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
5 This library is free software; you can redistribute it and/or
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 930
diff changeset
6 modify it under the terms of the GNU Lesser General Public
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
7 License as published by the Free Software Foundation; either
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 930
diff changeset
8 version 2.1 of the License, or (at your option) any later version.
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
9
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
10 This library is distributed in the hope that it will be useful,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 930
diff changeset
13 Lesser General Public License for more details.
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
14
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 930
diff changeset
15 You should have received a copy of the GNU Lesser General Public
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 930
diff changeset
16 License along with this library; if not, write to the Free Software
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 930
diff changeset
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
18
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
19 Sam Lantinga
251
b8688cfdc232 Updated the headers with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents: 188
diff changeset
20 slouken@libsdl.org
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
21 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
22
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
23 /**
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
24 * \file SDL_audio.h
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
25 *
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
26 * Access to the raw audio mixing buffer for the SDL library
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
27 */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
28
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
29 #ifndef _SDL_audio_h
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
30 #define _SDL_audio_h
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
31
1353
7ba544e2888d Started the process of improving configure support, and merging C types
Sam Lantinga <slouken@libsdl.org>
parents: 1330
diff changeset
32 #include "SDL_stdinc.h"
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
33 #include "SDL_error.h"
1358
c71e05b4dc2e More header massaging... works great on Windows. ;-)
Sam Lantinga <slouken@libsdl.org>
parents: 1356
diff changeset
34 #include "SDL_endian.h"
c71e05b4dc2e More header massaging... works great on Windows. ;-)
Sam Lantinga <slouken@libsdl.org>
parents: 1356
diff changeset
35 #include "SDL_mutex.h"
c71e05b4dc2e More header massaging... works great on Windows. ;-)
Sam Lantinga <slouken@libsdl.org>
parents: 1356
diff changeset
36 #include "SDL_thread.h"
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
37 #include "SDL_rwops.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
38
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
39 #include "begin_code.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
40 /* Set up for C function definitions, even when using C++ */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
41 #ifdef __cplusplus
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
42 /* *INDENT-OFF* */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
43 extern "C" {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
44 /* *INDENT-ON* */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
45 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
46
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
47 typedef Uint16 SDL_AudioFormat;
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
48
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
49 /* The calculated values in this structure are calculated by SDL_OpenAudio() */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
50 typedef struct SDL_AudioSpec
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
51 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
52 int freq; /* DSP frequency -- samples per second */
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
53 SDL_AudioFormat format; /* Audio data format */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
54 Uint8 channels; /* Number of channels: 1 mono, 2 stereo */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
55 Uint8 silence; /* Audio buffer silence value (calculated) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
56 Uint16 samples; /* Audio buffer size in samples (power of 2) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
57 Uint16 padding; /* Necessary for some compile environments */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
58 Uint32 size; /* Audio buffer size in bytes (calculated) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
59 /* This function is called when the audio device needs more data.
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
60 'stream' is a pointer to the audio data buffer
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
61 'len' is the length of that buffer in bytes.
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
62 Once the callback returns, the buffer will no longer be valid.
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
63 Stereo samples are stored in a LRLRLR ordering.
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
64 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
65 void (SDLCALL * callback) (void *userdata, Uint8 * stream, int len);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
66 void *userdata;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
67 } SDL_AudioSpec;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
68
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
69
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
70 /*
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
71 These are what the 16 bits in SDL_AudioFormat currently mean...
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
72 (Unspecified bits are always zero.)
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
73
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
74 ++-----------------------sample is signed if set
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
75 ||
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
76 || ++-----------sample is bigendian if set
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
77 || ||
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
78 || || ++---sample is float if set
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
79 || || ||
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
80 || || || +---sample bit size---+
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
81 || || || | |
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
82 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
83
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
84 There are macros in SDL 1.3 and later to query these bits.
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
85 */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
86
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
87 #define SDL_AUDIO_MASK_BITSIZE (0xFF)
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
88 #define SDL_AUDIO_MASK_DATATYPE (1<<8)
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
89 #define SDL_AUDIO_MASK_ENDIAN (1<<12)
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
90 #define SDL_AUDIO_MASK_SIGNED (1<<15)
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
91 #define SDL_AUDIO_BITSIZE(x) (x & SDL_AUDIO_MASK_BITSIZE)
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
92 #define SDL_AUDIO_ISFLOAT(x) (x & SDL_AUDIO_MASK_DATATYPE)
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
93 #define SDL_AUDIO_ISBIGENDIAN(x) (x & SDL_AUDIO_MASK_ENDIAN)
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
94 #define SDL_AUDIO_ISSIGNED(x) (x & SDL_AUDIO_MASK_SIGNED)
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
95 #define SDL_AUDIO_ISINT(x) (!SDL_AUDIO_ISFLOAT(x))
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
96 #define SDL_AUDIO_ISLITTLEENDIAN(x) (!SDL_AUDIO_ISBIGENDIAN(x))
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
97 #define SDL_AUDIO_ISUNSIGNED(x) (!SDL_AUDIO_ISSIGNED(x))
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
98
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
99 /* Audio format flags (defaults to LSB byte order) */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
100 #define AUDIO_U8 0x0008 /* Unsigned 8-bit samples */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
101 #define AUDIO_S8 0x8008 /* Signed 8-bit samples */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
102 #define AUDIO_U16LSB 0x0010 /* Unsigned 16-bit samples */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
103 #define AUDIO_S16LSB 0x8010 /* Signed 16-bit samples */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
104 #define AUDIO_U16MSB 0x1010 /* As above, but big-endian byte order */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
105 #define AUDIO_S16MSB 0x9010 /* As above, but big-endian byte order */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
106 #define AUDIO_U16 AUDIO_U16LSB
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
107 #define AUDIO_S16 AUDIO_S16LSB
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
108
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
109 /* int32 support new to SDL 1.3 */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
110 #define AUDIO_S32LSB 0x8020 /* 32-bit integer samples */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
111 #define AUDIO_S32MSB 0x9020 /* As above, but big-endian byte order */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
112 #define AUDIO_S32 AUDIO_S32LSB
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
113
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
114 /* float32 support new to SDL 1.3 */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
115 #define AUDIO_F32LSB 0x8120 /* 32-bit floating point samples */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
116 #define AUDIO_F32MSB 0x9120 /* As above, but big-endian byte order */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
117 #define AUDIO_F32 AUDIO_F32LSB
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
118
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
119 /* Native audio byte ordering */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
120 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
121 #define AUDIO_U16SYS AUDIO_U16LSB
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
122 #define AUDIO_S16SYS AUDIO_S16LSB
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
123 #define AUDIO_S32SYS AUDIO_S32LSB
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
124 #define AUDIO_F32SYS AUDIO_F32LSB
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
125 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
126 #define AUDIO_U16SYS AUDIO_U16MSB
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
127 #define AUDIO_S16SYS AUDIO_S16MSB
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
128 #define AUDIO_S32SYS AUDIO_S32MSB
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
129 #define AUDIO_F32SYS AUDIO_F32MSB
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
130 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
131
2866
e532417a6977 Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
132 /* Which audio format changes are allowed when opening a device */
e532417a6977 Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
133 #define SDL_AUDIO_ALLOW_FREQUENCY_CHANGE 0x00000001
e532417a6977 Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
134 #define SDL_AUDIO_ALLOW_FORMAT_CHANGE 0x00000002
e532417a6977 Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
135 #define SDL_AUDIO_ALLOW_CHANNELS_CHANGE 0x00000004
e532417a6977 Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
136 #define SDL_AUDIO_ALLOW_ANY_CHANGE (SDL_AUDIO_ALLOW_FREQUENCY_CHANGE|SDL_AUDIO_ALLOW_FORMAT_CHANGE|SDL_AUDIO_ALLOW_CHANNELS_CHANGE)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
137
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
138 /* A structure to hold a set of audio conversion filters and buffers */
1983
ee73925ddf14 Forgot to check in updated SDL_audio.h ...
Ryan C. Gordon <icculus@icculus.org>
parents: 1967
diff changeset
139 struct SDL_AudioCVT;
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1983
diff changeset
140 typedef void (SDLCALL * SDL_AudioFilter) (struct SDL_AudioCVT * cvt,
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1983
diff changeset
141 SDL_AudioFormat format);
1983
ee73925ddf14 Forgot to check in updated SDL_audio.h ...
Ryan C. Gordon <icculus@icculus.org>
parents: 1967
diff changeset
142
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
143 typedef struct SDL_AudioCVT
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
144 {
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1983
diff changeset
145 int needed; /* Set to 1 if conversion possible */
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1983
diff changeset
146 SDL_AudioFormat src_format; /* Source audio format */
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1983
diff changeset
147 SDL_AudioFormat dst_format; /* Target audio format */
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1983
diff changeset
148 double rate_incr; /* Rate conversion increment */
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1983
diff changeset
149 Uint8 *buf; /* Buffer to hold entire audio data */
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1983
diff changeset
150 int len; /* Length of original audio buffer */
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1983
diff changeset
151 int len_cvt; /* Length of converted audio buffer */
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1983
diff changeset
152 int len_mult; /* buffer must be len*len_mult big */
3021
f3dcf04412cf First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents: 2866
diff changeset
153 double len_ratio; /* Given len, final size is len*len_ratio */
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1983
diff changeset
154 SDL_AudioFilter filters[10]; /* Filter list */
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1983
diff changeset
155 int filter_index; /* Current audio conversion function */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
156 } SDL_AudioCVT;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
157
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
158
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
159 /* Function prototypes */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
160
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
161 /* These functions return the list of built in audio drivers, in the
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
162 * order that they are normally initialized by default.
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
163 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
164 extern DECLSPEC int SDLCALL SDL_GetNumAudioDrivers(void);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
165 extern DECLSPEC const char *SDLCALL SDL_GetAudioDriver(int index);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
166
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
167 /* These functions are used internally, and should not be used unless you
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
168 * have a specific need to specify the audio driver you want to use.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
169 * You should normally use SDL_Init() or SDL_InitSubSystem().
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
170 */
337
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
171 extern DECLSPEC int SDLCALL SDL_AudioInit(const char *driver_name);
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
172 extern DECLSPEC void SDLCALL SDL_AudioQuit(void);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
173
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
174 /* This function returns the name of the current audio driver, or NULL
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
175 * if no driver has been initialized.
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
176 */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
177 extern DECLSPEC const char *SDLCALL SDL_GetCurrentAudioDriver(void);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
178
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
179 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
180 * This function opens the audio device with the desired parameters, and
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
181 * returns 0 if successful, placing the actual hardware parameters in the
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
182 * structure pointed to by 'obtained'. If 'obtained' is NULL, the audio
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
183 * data passed to the callback function will be guaranteed to be in the
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
184 * requested format, and will be automatically converted to the hardware
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
185 * audio format if necessary. This function returns -1 if it failed
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
186 * to open the audio device, or couldn't set up the audio thread.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
187 *
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
188 * When filling in the desired audio spec structure,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
189 * 'desired->freq' should be the desired audio frequency in samples-per-second.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
190 * 'desired->format' should be the desired audio format.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
191 * 'desired->samples' is the desired size of the audio buffer, in samples.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
192 * This number should be a power of two, and may be adjusted by the audio
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
193 * driver to a value more suitable for the hardware. Good values seem to
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
194 * range between 512 and 8096 inclusive, depending on the application and
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
195 * CPU speed. Smaller values yield faster response time, but can lead
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
196 * to underflow if the application is doing heavy processing and cannot
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
197 * fill the audio buffer in time. A stereo sample consists of both right
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
198 * and left channels in LR ordering.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
199 * Note that the number of samples is directly related to time by the
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
200 * following formula: ms = (samples*1000)/freq
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
201 * 'desired->size' is the size in bytes of the audio buffer, and is
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
202 * calculated by SDL_OpenAudio().
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
203 * 'desired->silence' is the value used to set the buffer to silence,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
204 * and is calculated by SDL_OpenAudio().
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
205 * 'desired->callback' should be set to a function that will be called
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
206 * when the audio device is ready for more data. It is passed a pointer
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
207 * to the audio buffer, and the length in bytes of the audio buffer.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
208 * This function usually runs in a separate thread, and so you should
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
209 * protect data structures that it accesses by calling SDL_LockAudio()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
210 * and SDL_UnlockAudio() in your code.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
211 * 'desired->userdata' is passed as the first parameter to your callback
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
212 * function.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
213 *
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
214 * The audio device starts out playing silence when it's opened, and should
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
215 * be enabled for playing by calling SDL_PauseAudio(0) when you are ready
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
216 * for your audio callback function to be called. Since the audio driver
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
217 * may modify the requested size of the audio buffer, you should allocate
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
218 * any local mixing buffers after you open the audio device.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
219 */
2866
e532417a6977 Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
220 extern DECLSPEC int SDLCALL SDL_OpenAudio(SDL_AudioSpec * desired,
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
221 SDL_AudioSpec * obtained);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
222
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
223 /*
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
224 * SDL Audio Device IDs.
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
225 * A successful call to SDL_OpenAudio() is always device id 1, and legacy
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
226 * SDL audio APIs assume you want this device ID. SDL_OpenAudioDevice() calls
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
227 * always returns devices >= 2 on success. The legacy calls are good both
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
228 * for backwards compatibility and when you don't care about multiple,
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
229 * specific, or capture devices.
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
230 */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
231 typedef Uint32 SDL_AudioDeviceID;
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
232
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
233 /*
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
234 * Get the number of available devices exposed by the current driver.
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
235 * Only valid after a successfully initializing the audio subsystem.
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
236 * Returns -1 if an explicit list of devices can't be determined; this is
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
237 * not an error. For example, if SDL is set up to talk to a remote audio
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
238 * server, it can't list every one available on the Internet, but it will
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
239 * still allow a specific host to be specified to SDL_OpenAudioDevice().
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
240 * In many common cases, when this function returns a value <= 0, it can still
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
241 * successfully open the default device (NULL for first argument of
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
242 * SDL_OpenAudioDevice()).
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
243 */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
244 extern DECLSPEC int SDLCALL SDL_GetNumAudioDevices(int iscapture);
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
245
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
246 /*
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
247 * Get the human-readable name of a specific audio device.
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
248 * Must be a value between 0 and (number of audio devices-1).
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
249 * Only valid after a successfully initializing the audio subsystem.
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
250 * The values returned by this function reflect the latest call to
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
251 * SDL_GetNumAudioDevices(); recall that function to redetect available
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
252 * hardware.
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
253 *
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
254 * The string returned by this function is UTF-8 encoded, read-only, and
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
255 * managed internally. You are not to free it. If you need to keep the
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
256 * string for any length of time, you should make your own copy of it, as it
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
257 * will be invalid next time any of several other SDL functions is called.
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
258 */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
259 extern DECLSPEC const char *SDLCALL SDL_GetAudioDeviceName(int index,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
260 int iscapture);
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
261
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
262
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
263 /*
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
264 * Open a specific audio device. Passing in a device name of NULL requests
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
265 * the most reasonable default (and is equivalent to calling SDL_OpenAudio()).
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
266 * The device name is a UTF-8 string reported by SDL_GetAudioDevice(), but
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
267 * some drivers allow arbitrary and driver-specific strings, such as a
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
268 * hostname/IP address for a remote audio server, or a filename in the
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
269 * diskaudio driver.
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
270 * Returns 0 on error, a valid device ID that is >= 2 on success.
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1985
diff changeset
271 * SDL_OpenAudio(), unlike this function, always acts on device ID 1.
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
272 */
1967
01e29c3e9a29 In general, fill in pointers to structures, rather than return them.
Sam Lantinga <slouken@libsdl.org>
parents: 1964
diff changeset
273 extern DECLSPEC SDL_AudioDeviceID SDLCALL SDL_OpenAudioDevice(const char
01e29c3e9a29 In general, fill in pointers to structures, rather than return them.
Sam Lantinga <slouken@libsdl.org>
parents: 1964
diff changeset
274 *device,
01e29c3e9a29 In general, fill in pointers to structures, rather than return them.
Sam Lantinga <slouken@libsdl.org>
parents: 1964
diff changeset
275 int iscapture,
01e29c3e9a29 In general, fill in pointers to structures, rather than return them.
Sam Lantinga <slouken@libsdl.org>
parents: 1964
diff changeset
276 const
01e29c3e9a29 In general, fill in pointers to structures, rather than return them.
Sam Lantinga <slouken@libsdl.org>
parents: 1964
diff changeset
277 SDL_AudioSpec *
01e29c3e9a29 In general, fill in pointers to structures, rather than return them.
Sam Lantinga <slouken@libsdl.org>
parents: 1964
diff changeset
278 desired,
01e29c3e9a29 In general, fill in pointers to structures, rather than return them.
Sam Lantinga <slouken@libsdl.org>
parents: 1964
diff changeset
279 SDL_AudioSpec *
2866
e532417a6977 Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
280 obtained,
e532417a6977 Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
281 int
e532417a6977 Fixed SDL 1.2 compatibility problem.
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
282 allowed_changes);
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
283
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
284
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
285
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
286 /*
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287 * Get the current audio state:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288 */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
289 typedef enum
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
290 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
291 SDL_AUDIO_STOPPED = 0,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
292 SDL_AUDIO_PLAYING,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
293 SDL_AUDIO_PAUSED
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294 } SDL_audiostatus;
337
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
295 extern DECLSPEC SDL_audiostatus SDLCALL SDL_GetAudioStatus(void);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
296
1967
01e29c3e9a29 In general, fill in pointers to structures, rather than return them.
Sam Lantinga <slouken@libsdl.org>
parents: 1964
diff changeset
297 extern DECLSPEC SDL_audiostatus SDLCALL
01e29c3e9a29 In general, fill in pointers to structures, rather than return them.
Sam Lantinga <slouken@libsdl.org>
parents: 1964
diff changeset
298 SDL_GetAudioDeviceStatus(SDL_AudioDeviceID dev);
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
299
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
300 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
301 * This function pauses and unpauses the audio callback processing.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302 * It should be called with a parameter of 0 after opening the audio
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
303 * device to start playing sound. This is so you can safely initialize
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
304 * data for your callback function after opening the audio device.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
305 * Silence will be written to the audio device during the pause.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 */
337
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
307 extern DECLSPEC void SDLCALL SDL_PauseAudio(int pause_on);
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
308 extern DECLSPEC void SDLCALL SDL_PauseAudioDevice(SDL_AudioDeviceID dev,
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
309 int pause_on);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
310
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
311 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
312 * This function loads a WAVE from the data source, automatically freeing
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
313 * that source if 'freesrc' is non-zero. For example, to load a WAVE file,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
314 * you could do:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
315 * SDL_LoadWAV_RW(SDL_RWFromFile("sample.wav", "rb"), 1, ...);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
316 *
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
317 * If this function succeeds, it returns the given SDL_AudioSpec,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318 * filled with the audio data format of the wave data, and sets
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
319 * 'audio_buf' to a malloc()'d buffer containing the audio data,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320 * and sets 'audio_len' to the length of that audio buffer, in bytes.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321 * You need to free the audio buffer with SDL_FreeWAV() when you are
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
322 * done with it.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323 *
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324 * This function returns NULL and sets the SDL error message if the
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 * wave file cannot be opened, uses an unknown data format, or is
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
326 * corrupt. Currently raw and MS-ADPCM WAVE files are supported.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327 */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
328 extern DECLSPEC SDL_AudioSpec *SDLCALL SDL_LoadWAV_RW(SDL_RWops * src,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
329 int freesrc,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
330 SDL_AudioSpec * spec,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
331 Uint8 ** audio_buf,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
332 Uint32 * audio_len);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 /* Compatibility convenience function -- loads a WAV from a file */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 #define SDL_LoadWAV(file, spec, audio_buf, audio_len) \
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336 SDL_LoadWAV_RW(SDL_RWFromFile(file, "rb"),1, spec,audio_buf,audio_len)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
338 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
339 * This function frees data previously allocated with SDL_LoadWAV_RW()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340 */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
341 extern DECLSPEC void SDLCALL SDL_FreeWAV(Uint8 * audio_buf);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
343 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
344 * This function takes a source format and rate and a destination format
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
345 * and rate, and initializes the 'cvt' structure with information needed
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
346 * by SDL_ConvertAudio() to convert a buffer of audio data from one format
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
347 * to the other.
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
348 * Returns -1 if the format conversion is not supported, 0 if there's
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
349 * no conversion needed, or 1 if the audio filter is set up.
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
350 */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
351 extern DECLSPEC int SDLCALL SDL_BuildAudioCVT(SDL_AudioCVT * cvt,
1983
ee73925ddf14 Forgot to check in updated SDL_audio.h ...
Ryan C. Gordon <icculus@icculus.org>
parents: 1967
diff changeset
352 SDL_AudioFormat src_format,
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
353 Uint8 src_channels,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
354 int src_rate,
1983
ee73925ddf14 Forgot to check in updated SDL_audio.h ...
Ryan C. Gordon <icculus@icculus.org>
parents: 1967
diff changeset
355 SDL_AudioFormat dst_format,
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
356 Uint8 dst_channels,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
357 int dst_rate);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
358
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
359 /* Once you have initialized the 'cvt' structure using SDL_BuildAudioCVT(),
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
360 * created an audio buffer cvt->buf, and filled it with cvt->len bytes of
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361 * audio data in the source format, this function will convert it in-place
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362 * to the desired format.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
363 * The data conversion may expand the size of the audio data, so the buffer
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
364 * cvt->buf should be allocated after the cvt structure is initialized by
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
365 * SDL_BuildAudioCVT(), and should be cvt->len*cvt->len_mult bytes long.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
366 */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
367 extern DECLSPEC int SDLCALL SDL_ConvertAudio(SDL_AudioCVT * cvt);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
368
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
369 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
370 * This takes two audio buffers of the playing audio format and mixes
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
371 * them, performing addition, volume adjustment, and overflow clipping.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
372 * The volume ranges from 0 - 128, and should be set to SDL_MIX_MAXVOLUME
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
373 * for full audio volume. Note this does not change hardware volume.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
374 * This is provided for convenience -- you can mix your own audio data.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
375 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
376 #define SDL_MIX_MAXVOLUME 128
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
377 extern DECLSPEC void SDLCALL SDL_MixAudio(Uint8 * dst, const Uint8 * src,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
378 Uint32 len, int volume);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
379
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
380 /*
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
381 * This works like SDL_MixAudio, but you specify the audio format instead of
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
382 * using the format of audio device 1. Thus it can be used when no audio
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
383 * device is open at all.
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
384 */
1967
01e29c3e9a29 In general, fill in pointers to structures, rather than return them.
Sam Lantinga <slouken@libsdl.org>
parents: 1964
diff changeset
385 extern DECLSPEC void SDLCALL SDL_MixAudioFormat(Uint8 * dst,
01e29c3e9a29 In general, fill in pointers to structures, rather than return them.
Sam Lantinga <slouken@libsdl.org>
parents: 1964
diff changeset
386 const Uint8 * src,
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
387 SDL_AudioFormat format,
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
388 Uint32 len, int volume);
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
389
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
390 /*
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
391 * The lock manipulated by these functions protects the callback function.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392 * During a LockAudio/UnlockAudio pair, you can be guaranteed that the
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
393 * callback function is not running. Do not call these from the callback
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
394 * function or you will cause deadlock.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
395 */
337
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
396 extern DECLSPEC void SDLCALL SDL_LockAudio(void);
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
397 extern DECLSPEC void SDLCALL SDL_LockAudioDevice(SDL_AudioDeviceID dev);
337
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
398 extern DECLSPEC void SDLCALL SDL_UnlockAudio(void);
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
399 extern DECLSPEC void SDLCALL SDL_UnlockAudioDevice(SDL_AudioDeviceID dev);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
400
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
401 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
402 * This function shuts down audio processing and closes the audio device.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
403 */
337
9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
404 extern DECLSPEC void SDLCALL SDL_CloseAudio(void);
1964
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
405 extern DECLSPEC void SDLCALL SDL_CloseAudioDevice(SDL_AudioDeviceID dev);
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
406
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
407 /*
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
408 * Returns 1 if audio device is still functioning, zero if not, -1 on error.
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
409 */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
410 extern DECLSPEC int SDLCALL SDL_AudioDeviceConnected(SDL_AudioDeviceID dev);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
411
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
412
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
413 /* Ends C function definitions when using C++ */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
414 #ifdef __cplusplus
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
415 /* *INDENT-OFF* */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
416 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
417 /* *INDENT-ON* */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
418 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
419 #include "close_code.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
420
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
421 #endif /* _SDL_audio_h */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
422
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
423 /* vi: set ts=4 sw=4 expandtab: */