sdl-ios-xcode: include/SDL

annotate include/SDL_audio.h @ 3456:6b182cbe38ac

Allow some variation in the pixel values to account for blending accuracy differences.

author	Sam Lantinga <slouken@libsdl.org>
date	Thu, 19 Nov 2009 05:06:01 +0000
parents	d3baf5ac4e37
children	e897a4a9f578

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 /**
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	24 * \file SDL_audio.h
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	25 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	26 * Access to the raw audio mixing buffer for the SDL library.
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	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
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	47 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	48 * \brief Audio format flags.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	49 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	50 * These are what the 16 bits in SDL_AudioFormat currently mean...
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	51 * (Unspecified bits are always zero).
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	52 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	53 * \verbatim
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	54 ++-----------------------sample is signed if set
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	55 \|\|
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	56 \|\| ++-----------sample is bigendian if set
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	57 \|\| \|\|
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	58 \|\| \|\| ++---sample is float if set
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	59 \|\| \|\| \|\|
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	60 \|\| \|\| \|\| +---sample bit size---+
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	61 \|\| \|\| \|\| \| \|
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	62 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	63 \endverbatim
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	64 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	65 * There are macros in SDL 1.3 and later to query these bits.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	66 */
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	67 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	68
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	69 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	70 * \name Audio flags
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	71 */
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	72 /@{/
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	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 #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	75 #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	76 #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	77 #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	78 #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	79 #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	80 #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	81 #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	82 #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	83 #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	84 #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	85
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	86 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	87 * \name Audio format flags
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	88 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	89 * Defaults to LSB byte order.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	90 */
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	91 /@{/
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	92 #define AUDIO_U8 0x0008 /*< Unsigned 8-bit samples /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	93 #define AUDIO_S8 0x8008 /*< Signed 8-bit samples /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	94 #define AUDIO_U16LSB 0x0010 /*< Unsigned 16-bit samples /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	95 #define AUDIO_S16LSB 0x8010 /*< Signed 16-bit samples /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	96 #define AUDIO_U16MSB 0x1010 /*< As above, but big-endian byte order /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	97 #define AUDIO_S16MSB 0x9010 /*< As above, but big-endian byte order /
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	98 #define AUDIO_U16 AUDIO_U16LSB
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	99 #define AUDIO_S16 AUDIO_S16LSB
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	100 /@}/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	101
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	102 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	103 * \name int32 support
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	104 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	105 * New to SDL 1.3.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	106 */
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	107 /@{/
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	108 #define AUDIO_S32LSB 0x8020 /*< 32-bit integer samples /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	109 #define AUDIO_S32MSB 0x9020 /*< As above, but big-endian byte order /
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	110 #define AUDIO_S32 AUDIO_S32LSB
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	111 /@}/
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	112
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	113 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	114 * \name float32 support
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	115 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	116 * New to SDL 1.3.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	117 */
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	118 /@{/
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	119 #define AUDIO_F32LSB 0x8120 /*< 32-bit floating point samples /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	120 #define AUDIO_F32MSB 0x9120 /*< As above, but big-endian byte order /
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	121 #define AUDIO_F32 AUDIO_F32LSB
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	122 /@}/
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
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	124 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	125 * \name Native audio byte ordering
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	126 */
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	127 /@{/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	128 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	129 #define AUDIO_U16SYS AUDIO_U16LSB
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	130 #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	131 #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	132 #define AUDIO_F32SYS AUDIO_F32LSB
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	133 #else
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	134 #define AUDIO_U16SYS AUDIO_U16MSB
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	135 #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	136 #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	137 #define AUDIO_F32SYS AUDIO_F32MSB
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	138 #endif
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	139 /@}/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	140
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	141 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	142 * \name Allow change flags
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	143 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	144 * Which audio format changes are allowed when opening a device.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	145 */
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	146 /@{/
2866 e532417a6977 Fixed SDL 1.2 compatibility problem. Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	147 #define SDL_AUDIO_ALLOW_FREQUENCY_CHANGE 0x00000001
e532417a6977 Fixed SDL 1.2 compatibility problem. Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	148 #define SDL_AUDIO_ALLOW_FORMAT_CHANGE 0x00000002
e532417a6977 Fixed SDL 1.2 compatibility problem. Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	149 #define SDL_AUDIO_ALLOW_CHANNELS_CHANGE 0x00000004
e532417a6977 Fixed SDL 1.2 compatibility problem. Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	150 #define SDL_AUDIO_ALLOW_ANY_CHANGE (SDL_AUDIO_ALLOW_FREQUENCY_CHANGE\|SDL_AUDIO_ALLOW_FORMAT_CHANGE\|SDL_AUDIO_ALLOW_CHANNELS_CHANGE)
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	151 /@}/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	152
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	153 /@}//Audio flags/
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	154
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	155 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	156 * The calculated values in this structure are calculated by SDL_OpenAudio().
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	157 */
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	158 typedef struct SDL_AudioSpec
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	159 {
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	160 int freq; /*< DSP frequency -- samples per second /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	161 SDL_AudioFormat format; /*< Audio data format /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	162 Uint8 channels; /*< Number of channels: 1 mono, 2 stereo /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	163 Uint8 silence; /*< Audio buffer silence value (calculated) /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	164 Uint16 samples; /*< Audio buffer size in samples (power of 2) /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	165 Uint16 padding; /*< Necessary for some compile environments /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	166 Uint32 size; /*< Audio buffer size in bytes (calculated) /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	167 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	168 * This function is called when the audio device needs more data.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	169 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	170 * \param stream A pointer to the audio data buffer.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	171 * \param len The length of that buffer in bytes.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	172 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	173 * Once the callback returns, the buffer will no longer be valid.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	174 * Stereo samples are stored in a LRLRLR ordering.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	175 */
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	176 void (SDLCALL * callback) (void userdata, Uint8 stream, int len);
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	177 void *userdata;
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	178 } SDL_AudioSpec;
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	179
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	180
1983 ee73925ddf14 Forgot to check in updated SDL_audio.h ... Ryan C. Gordon <icculus@icculus.org> parents: 1967 diff changeset	181 struct SDL_AudioCVT;
1985 8055185ae4ed Added source color and alpha modulation support. Sam Lantinga <slouken@libsdl.org> parents: 1983 diff changeset	182 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	183 SDL_AudioFormat format);
1983 ee73925ddf14 Forgot to check in updated SDL_audio.h ... Ryan C. Gordon <icculus@icculus.org> parents: 1967 diff changeset	184
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	185 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	186 * A structure to hold a set of audio conversion filters and buffers.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	187 */
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	188 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	189 {
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	190 int needed; /*< Set to 1 if conversion possible /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	191 SDL_AudioFormat src_format; /*< Source audio format /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	192 SDL_AudioFormat dst_format; /*< Target audio format /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	193 double rate_incr; /*< Rate conversion increment /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	194 Uint8 buf; /< Buffer to hold entire audio data /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	195 int len; /*< Length of original audio buffer /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	196 int len_cvt; /*< Length of converted audio buffer /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	197 int len_mult; /*< buffer must be lenlen_mult big */
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	198 double len_ratio; /*< Given len, final size is lenlen_ratio */
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	199 SDL_AudioFilter filters[10]; /*< Filter list /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	200 int filter_index; /*< Current audio conversion function /
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	201 } SDL_AudioCVT;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	202
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	203
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	204 /* Function prototypes */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	205
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	206 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	207 * \name Driver discovery functions
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	208 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	209 * These functions return the list of built in audio drivers, in the
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	210 * order that they are normally initialized by default.
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	211 */
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	212 /@{/
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	213 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	214 extern DECLSPEC const char *SDLCALL SDL_GetAudioDriver(int index);
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	215 /@}/
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	216
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	217 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	218 * \name Initialization and cleanup
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	219 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	220 * \internal These functions are used internally, and should not be used unless
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	221 * you have a specific need to specify the audio driver you want to
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	222 * use. You should normally use SDL_Init() or SDL_InitSubSystem().
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	223 */
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	224 /@{/
337 9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default) Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	225 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	226 extern DECLSPEC void SDLCALL SDL_AudioQuit(void);
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	227 /@}/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	228
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	229 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	230 * This function returns the name of the current audio driver, or NULL
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	231 * if no driver has been initialized.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	232 */
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	233 extern DECLSPEC const char *SDLCALL SDL_GetCurrentAudioDriver(void);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	234
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	235 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	236 * This function opens the audio device with the desired parameters, and
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	237 * returns 0 if successful, placing the actual hardware parameters in the
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	238 * structure pointed to by \c obtained. If \c obtained is NULL, the audio
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	239 * data passed to the callback function will be guaranteed to be in the
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	240 * requested format, and will be automatically converted to the hardware
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	241 * audio format if necessary. This function returns -1 if it failed
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	242 * to open the audio device, or couldn't set up the audio thread.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	243 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	244 * When filling in the desired audio spec structure,
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	245 * - \c desired->freq should be the desired audio frequency in samples-per-
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	246 * second.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	247 * - \c desired->format should be the desired audio format.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	248 * - \c desired->samples is the desired size of the audio buffer, in
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	249 * samples. This number should be a power of two, and may be adjusted by
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	250 * the audio driver to a value more suitable for the hardware. Good values
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	251 * seem to range between 512 and 8096 inclusive, depending on the
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	252 * application and CPU speed. Smaller values yield faster response time,
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	253 * but can lead to underflow if the application is doing heavy processing
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	254 * and cannot fill the audio buffer in time. A stereo sample consists of
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	255 * both right and left channels in LR ordering.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	256 * Note that the number of samples is directly related to time by the
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	257 * following formula: \code ms = (samples*1000)/freq \endcode
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	258 * - \c desired->size is the size in bytes of the audio buffer, and is
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	259 * calculated by SDL_OpenAudio().
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	260 * - \c desired->silence is the value used to set the buffer to silence,
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	261 * and is calculated by SDL_OpenAudio().
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	262 * - \c desired->callback should be set to a function that will be called
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	263 * when the audio device is ready for more data. It is passed a pointer
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	264 * to the audio buffer, and the length in bytes of the audio buffer.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	265 * This function usually runs in a separate thread, and so you should
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	266 * protect data structures that it accesses by calling SDL_LockAudio()
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	267 * and SDL_UnlockAudio() in your code.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	268 * - \c desired->userdata is passed as the first parameter to your callback
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	269 * function.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	270 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	271 * The audio device starts out playing silence when it's opened, and should
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	272 * be enabled for playing by calling \c SDL_PauseAudio(0) when you are ready
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	273 * for your audio callback function to be called. Since the audio driver
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	274 * may modify the requested size of the audio buffer, you should allocate
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	275 * any local mixing buffers after you open the audio device.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	276 */
2866 e532417a6977 Fixed SDL 1.2 compatibility problem. Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	277 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	278 SDL_AudioSpec * obtained);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	279
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	280 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	281 * SDL Audio Device IDs.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	282 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	283 * A successful call to SDL_OpenAudio() is always device id 1, and legacy
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	284 * 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	285 * 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	286 * 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	287 * 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	288 */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to Ryan C. Gordon <icculus@icculus.org> parents: 1895 diff changeset	289 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	290
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	291 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	292 * Get the number of available devices exposed by the current driver.
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	293 * 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	294 * 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	295 * 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	296 * 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	297 * still allow a specific host to be specified to SDL_OpenAudioDevice().
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	298 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	299 * In many common cases, when this function returns a value <= 0, it can still
2049 5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk. Ryan C. Gordon <icculus@icculus.org> parents: 1985 diff changeset	300 * 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	301 * 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	302 */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to Ryan C. Gordon <icculus@icculus.org> parents: 1895 diff changeset	303 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	304
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	305 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	306 * Get the human-readable name of a specific audio device.
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	307 * 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	308 * 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	309 * 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	310 * 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	311 * hardware.
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	312 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	313 * The string returned by this function is UTF-8 encoded, read-only, and
2049 5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk. Ryan C. Gordon <icculus@icculus.org> parents: 1985 diff changeset	314 * 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	315 * 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	316 * 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	317 */
2049 5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk. Ryan C. Gordon <icculus@icculus.org> parents: 1985 diff changeset	318 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	319 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	320
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to Ryan C. Gordon <icculus@icculus.org> parents: 1895 diff changeset	321
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	322 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	323 * Open a specific audio device. Passing in a device name of NULL requests
2049 5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk. Ryan C. Gordon <icculus@icculus.org> parents: 1985 diff changeset	324 * the most reasonable default (and is equivalent to calling SDL_OpenAudio()).
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	325 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	326 * The device name is a UTF-8 string reported by SDL_GetAudioDeviceName(), but
2049 5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk. Ryan C. Gordon <icculus@icculus.org> parents: 1985 diff changeset	327 * 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	328 * 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	329 * diskaudio driver.
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	330 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	331 * \return 0 on error, a valid device ID that is >= 2 on success.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	332 *
2049 5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk. Ryan C. Gordon <icculus@icculus.org> parents: 1985 diff changeset	333 * 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	334 */
1967 01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	335 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	336 *device,
01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	337 int iscapture,
01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	338 const
01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	339 SDL_AudioSpec *
01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	340 desired,
01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	341 SDL_AudioSpec *
2866 e532417a6977 Fixed SDL 1.2 compatibility problem. Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	342 obtained,
e532417a6977 Fixed SDL 1.2 compatibility problem. Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	343 int
e532417a6977 Fixed SDL 1.2 compatibility problem. Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	344 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	345
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to Ryan C. Gordon <icculus@icculus.org> parents: 1895 diff changeset	346
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to Ryan C. Gordon <icculus@icculus.org> parents: 1895 diff changeset	347
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	348 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	349 * \name Audio state
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	350 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	351 * Get the current audio state.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	352 */
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	353 /@{/
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	354 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	355 {
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 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	357 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	358 SDL_AUDIO_PAUSED
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	359 } SDL_audiostatus;
337 9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default) Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	360 extern DECLSPEC SDL_audiostatus SDLCALL SDL_GetAudioStatus(void);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	361
1967 01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	362 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	363 SDL_GetAudioDeviceStatus(SDL_AudioDeviceID dev);
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	364 /@}//Audio State/
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	365
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	366 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	367 * \name Pause audio functions
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	368 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	369 * These functions pause and unpause the audio callback processing.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	370 * They should be called with a parameter of 0 after opening the audio
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	371 * device to start playing sound. This is so you can safely initialize
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	372 * data for your callback function after opening the audio device.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	373 * Silence will be written to the audio device during the pause.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	374 */
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	375 /@{/
337 9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default) Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	376 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	377 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	378 int pause_on);
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	379 /@}//Pause audio functions/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	380
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	381 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	382 * This function loads a WAVE from the data source, automatically freeing
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	383 * that source if \c freesrc is non-zero. For example, to load a WAVE file,
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	384 * you could do:
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	385 * \code
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	386 * SDL_LoadWAV_RW(SDL_RWFromFile("sample.wav", "rb"), 1, ...);
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	387 * \endcode
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	388 *
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	389 * If this function succeeds, it returns the given SDL_AudioSpec,
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	390 * filled with the audio data format of the wave data, and sets
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	391 * \c *audio_buf to a malloc()'d buffer containing the audio data,
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	392 * and sets \c *audio_len to the length of that audio buffer, in bytes.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	393 * You need to free the audio buffer with SDL_FreeWAV() when you are
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	394 * done with it.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	395 *
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	396 * This function returns NULL and sets the SDL error message if the
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	397 * wave file cannot be opened, uses an unknown data format, or is
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	398 * corrupt. Currently raw and MS-ADPCM WAVE files are supported.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	399 */
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	400 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	401 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	402 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	403 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	404 Uint32 * audio_len);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	405
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	406 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	407 * Loads a WAV from a file.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	408 * Compatibility convenience function.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	409 */
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	410 #define SDL_LoadWAV(file, spec, audio_buf, audio_len) \
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	411 SDL_LoadWAV_RW(SDL_RWFromFile(file, "rb"),1, spec,audio_buf,audio_len)
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	412
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	413 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	414 * This function frees data previously allocated with SDL_LoadWAV_RW()
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	415 */
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	416 extern DECLSPEC void SDLCALL SDL_FreeWAV(Uint8 * audio_buf);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	417
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	418 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	419 * This function takes a source format and rate and a destination format
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	420 * and rate, and initializes the \c cvt structure with information needed
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	421 * by SDL_ConvertAudio() to convert a buffer of audio data from one format
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	422 * to the other.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	423 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	424 * \return -1 if the format conversion is not supported, 0 if there's
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	425 * no conversion needed, or 1 if the audio filter is set up.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	426 */
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	427 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	428 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	429 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	430 int src_rate,
1983 ee73925ddf14 Forgot to check in updated SDL_audio.h ... Ryan C. Gordon <icculus@icculus.org> parents: 1967 diff changeset	431 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	432 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	433 int dst_rate);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	434
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	435 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	436 * Once you have initialized the \c cvt structure using SDL_BuildAudioCVT(),
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	437 * created an audio buffer \c cvt->buf, and filled it with \c cvt->len bytes of
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	438 * audio data in the source format, this function will convert it in-place
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	439 * to the desired format.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	440 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	441 * The data conversion may expand the size of the audio data, so the buffer
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	442 * \c cvt->buf should be allocated after the \c cvt structure is initialized by
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	443 * SDL_BuildAudioCVT(), and should be \c cvt->len*cvt->len_mult bytes long.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	444 */
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	445 extern DECLSPEC int SDLCALL SDL_ConvertAudio(SDL_AudioCVT * cvt);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	446
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	447 #define SDL_MIX_MAXVOLUME 128
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	448 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	449 * This takes two audio buffers of the playing audio format and mixes
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	450 * them, performing addition, volume adjustment, and overflow clipping.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	451 * The volume ranges from 0 - 128, and should be set to ::SDL_MIX_MAXVOLUME
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	452 * for full audio volume. Note this does not change hardware volume.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	453 * This is provided for convenience -- you can mix your own audio data.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	454 */
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	455 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	456 Uint32 len, int volume);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	457
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	458 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	459 * This works like SDL_MixAudio(), but you specify the audio format instead of
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	460 * 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	461 * 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	462 */
1967 01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	463 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	464 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	465 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	466 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	467
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	468 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	469 * \name Audio lock functions
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	470 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	471 * The lock manipulated by these functions protects the callback function.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	472 * During a SDL_LockAudio()/SDL_UnlockAudio() pair, you can be guaranteed that
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	473 * the callback function is not running. Do not call these from the callback
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	474 * function or you will cause deadlock.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	475 */
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	476 /@{/
337 9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default) Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	477 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	478 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	479 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	480 extern DECLSPEC void SDLCALL SDL_UnlockAudioDevice(SDL_AudioDeviceID dev);
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	481 /@}//Audio lock functions/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	482
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	483 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	484 * This function shuts down audio processing and closes the audio device.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	485 */
337 9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default) Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	486 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	487 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	488
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	489 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	490 * \return 1 if audio device is still functioning, zero if not, -1 on error.
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	491 */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to Ryan C. Gordon <icculus@icculus.org> parents: 1895 diff changeset	492 extern DECLSPEC int SDLCALL SDL_AudioDeviceConnected(SDL_AudioDeviceID dev);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	493
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	494
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	495 /* Ends C function definitions when using C++ */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	496 #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	497 /* INDENT-OFF */
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	498 }
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	499 /* INDENT-ON */
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	500 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	501 #include "close_code.h"
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	502
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	503 #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	504
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	505 /* vi: set ts=4 sw=4 expandtab: */

Mercurial > sdl-ios-xcode

annotate include/SDL_audio.h @ 3456:6b182cbe38ac