sdl-ios-xcode: include/SDL

annotate include/SDL_audio.h @ 5161:b3ccd1947786

Simplified and improved the process of creating a texture from a surface.

author	Sam Lantinga <slouken@libsdl.org>
date	Thu, 03 Feb 2011 00:54:29 -0800
parents	f7b03b6838cb
children	b530ef003506

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
3697 f7b03b6838cb Fixed bug #926 Sam Lantinga <slouken@libsdl.org> parents: 3554 diff changeset	3 Copyright (C) 1997-2010 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 /**
3554 cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	156 * This function is called when the audio device needs more data.
cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	157 *
cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	158 * \param userdata An application-specific parameter saved in
cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	159 * the SDL_AudioSpec structure
cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	160 * \param stream A pointer to the audio data buffer.
cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	161 * \param len The length of that buffer in bytes.
cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	162 *
cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	163 * Once the callback returns, the buffer will no longer be valid.
cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	164 * Stereo samples are stored in a LRLRLR ordering.
cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	165 */
cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	166 typedef void (SDLCALL * SDL_AudioCallback) (void userdata, Uint8 stream,
cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	167 int len);
cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	168
cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	169 /**
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	170 * 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	171 */
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	172 typedef struct SDL_AudioSpec
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	173 {
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	174 int freq; /*< DSP frequency -- samples per second /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	175 SDL_AudioFormat format; /*< Audio data format /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	176 Uint8 channels; /*< Number of channels: 1 mono, 2 stereo /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	177 Uint8 silence; /*< Audio buffer silence value (calculated) /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	178 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	179 Uint16 padding; /*< Necessary for some compile environments /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	180 Uint32 size; /*< Audio buffer size in bytes (calculated) /
3554 cf815007e443 Name the audio callback for documentation clarity. Sam Lantinga <slouken@libsdl.org> parents: 3537 diff changeset	181 SDL_AudioCallback callback;
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	182 void *userdata;
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	183 } SDL_AudioSpec;
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	184
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	185
1983 ee73925ddf14 Forgot to check in updated SDL_audio.h ... Ryan C. Gordon <icculus@icculus.org> parents: 1967 diff changeset	186 struct SDL_AudioCVT;
1985 8055185ae4ed Added source color and alpha modulation support. Sam Lantinga <slouken@libsdl.org> parents: 1983 diff changeset	187 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	188 SDL_AudioFormat format);
1983 ee73925ddf14 Forgot to check in updated SDL_audio.h ... Ryan C. Gordon <icculus@icculus.org> parents: 1967 diff changeset	189
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	190 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	191 * 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	192 */
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	193 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	194 {
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	195 int needed; /*< Set to 1 if conversion possible /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	196 SDL_AudioFormat src_format; /*< Source audio format /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	197 SDL_AudioFormat dst_format; /*< Target audio format /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	198 double rate_incr; /*< Rate conversion increment /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	199 Uint8 buf; /< Buffer to hold entire audio data /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	200 int len; /*< Length of original audio buffer /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	201 int len_cvt; /*< Length of converted audio buffer /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	202 int len_mult; /*< buffer must be lenlen_mult big */
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	203 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	204 SDL_AudioFilter filters[10]; /*< Filter list /
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	205 int filter_index; /*< Current audio conversion function /
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	206 } SDL_AudioCVT;
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	207
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	208
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	209 /* Function prototypes */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	210
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	211 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	212 * \name Driver discovery functions
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	213 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	214 * 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	215 * 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	216 */
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	217 /@{/
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	218 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	219 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	220 /@}/
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
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	222 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	223 * \name Initialization and cleanup
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	224 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	225 * \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	226 * 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	227 * use. You should normally use SDL_Init() or SDL_InitSubSystem().
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 /@{/
337 9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default) Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	230 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	231 extern DECLSPEC void SDLCALL SDL_AudioQuit(void);
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	232 /@}/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	233
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	234 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	235 * 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	236 * if no driver has been initialized.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	237 */
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	238 extern DECLSPEC const char *SDLCALL SDL_GetCurrentAudioDriver(void);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	239
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	240 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	241 * 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	242 * 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	243 * 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	244 * 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	245 * 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	246 * 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	247 * 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	248 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	249 * When filling in the desired audio spec structure,
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	250 * - \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	251 * second.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	252 * - \c desired->format should be the desired audio format.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	253 * - \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	254 * 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	255 * 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	256 * 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	257 * 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	258 * 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	259 * 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	260 * both right and left channels in LR ordering.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	261 * 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	262 * following formula: \code ms = (samples*1000)/freq \endcode
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	263 * - \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	264 * calculated by SDL_OpenAudio().
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	265 * - \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	266 * and is calculated by SDL_OpenAudio().
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	267 * - \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	268 * 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	269 * 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	270 * 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	271 * 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	272 * and SDL_UnlockAudio() in your code.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	273 * - \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	274 * function.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	275 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	276 * 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	277 * 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	278 * 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	279 * 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	280 * any local mixing buffers after you open the audio device.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	281 */
2866 e532417a6977 Fixed SDL 1.2 compatibility problem. Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	282 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	283 SDL_AudioSpec * obtained);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	284
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	285 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	286 * SDL Audio Device IDs.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	287 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	288 * 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	289 * 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	290 * 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	291 * 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	292 * 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	293 */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to Ryan C. Gordon <icculus@icculus.org> parents: 1895 diff changeset	294 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	295
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	296 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	297 * 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	298 * 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	299 * 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	300 * 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	301 * 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	302 * 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	303 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	304 * 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	305 * 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	306 * 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	307 */
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 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	309
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	310 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	311 * 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	312 * 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	313 * 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	314 * 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	315 * 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	316 * hardware.
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	317 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	318 * 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	319 * 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	320 * 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	321 * 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	322 */
2049 5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk. Ryan C. Gordon <icculus@icculus.org> parents: 1985 diff changeset	323 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	324 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	325
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to Ryan C. Gordon <icculus@icculus.org> parents: 1895 diff changeset	326
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	327 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	328 * 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	329 * 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	330 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	331 * 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	332 * 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	333 * 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	334 * diskaudio driver.
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	335 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	336 * \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	337 *
2049 5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk. Ryan C. Gordon <icculus@icculus.org> parents: 1985 diff changeset	338 * 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	339 */
1967 01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	340 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	341 *device,
01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	342 int iscapture,
01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	343 const
01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	344 SDL_AudioSpec *
01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	345 desired,
01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	346 SDL_AudioSpec *
2866 e532417a6977 Fixed SDL 1.2 compatibility problem. Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	347 obtained,
e532417a6977 Fixed SDL 1.2 compatibility problem. Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	348 int
e532417a6977 Fixed SDL 1.2 compatibility problem. Sam Lantinga <slouken@libsdl.org> parents: 2859 diff changeset	349 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	350
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to Ryan C. Gordon <icculus@icculus.org> parents: 1895 diff changeset	351
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to Ryan C. Gordon <icculus@icculus.org> parents: 1895 diff changeset	352
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	353 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	354 * \name Audio state
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	355 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	356 * Get the current audio state.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	357 */
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	358 /@{/
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	359 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	360 {
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	361 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	362 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	363 SDL_AUDIO_PAUSED
3537 e897a4a9f578 Switch to mixed case for consistency with other enumerations Sam Lantinga <slouken@libsdl.org> parents: 3407 diff changeset	364 } SDL_AudioStatus;
e897a4a9f578 Switch to mixed case for consistency with other enumerations Sam Lantinga <slouken@libsdl.org> parents: 3407 diff changeset	365 extern DECLSPEC SDL_AudioStatus SDLCALL SDL_GetAudioStatus(void);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	366
3537 e897a4a9f578 Switch to mixed case for consistency with other enumerations Sam Lantinga <slouken@libsdl.org> parents: 3407 diff changeset	367 extern DECLSPEC SDL_AudioStatus SDLCALL
1967 01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	368 SDL_GetAudioDeviceStatus(SDL_AudioDeviceID dev);
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	369 /@}//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	370
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	371 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	372 * \name Pause audio functions
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	373 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	374 * These functions pause and unpause the audio callback processing.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	375 * 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	376 * 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	377 * 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	378 * Silence will be written to the audio device during the pause.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	379 */
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	380 /@{/
337 9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default) Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	381 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	382 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	383 int pause_on);
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	384 /@}//Pause audio functions/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	385
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	386 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	387 * 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	388 * 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	389 * you could do:
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	390 * \code
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	391 * SDL_LoadWAV_RW(SDL_RWFromFile("sample.wav", "rb"), 1, ...);
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	392 * \endcode
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	393 *
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	394 * 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	395 * 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	396 * \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	397 * 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	398 * 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	399 * done with it.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	400 *
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	401 * 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	402 * 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	403 * corrupt. Currently raw and MS-ADPCM WAVE files are supported.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	404 */
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	405 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	406 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	407 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	408 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	409 Uint32 * audio_len);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	410
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	411 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	412 * Loads a WAV from a file.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	413 * Compatibility convenience function.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	414 */
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	415 #define SDL_LoadWAV(file, spec, audio_buf, audio_len) \
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	416 SDL_LoadWAV_RW(SDL_RWFromFile(file, "rb"),1, spec,audio_buf,audio_len)
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 frees data previously allocated with SDL_LoadWAV_RW()
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	420 */
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	421 extern DECLSPEC void SDLCALL SDL_FreeWAV(Uint8 * audio_buf);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	422
3407 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 * 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	425 * 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	426 * 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	427 * to the other.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	428 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	429 * \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	430 * no conversion needed, or 1 if the audio filter is set up.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	431 */
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 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	433 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	434 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	435 int src_rate,
1983 ee73925ddf14 Forgot to check in updated SDL_audio.h ... Ryan C. Gordon <icculus@icculus.org> parents: 1967 diff changeset	436 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	437 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	438 int dst_rate);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	439
3407 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 * 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	442 * 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	443 * 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	444 * to the desired format.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	445 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	446 * 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	447 * \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	448 * 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	449 */
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	450 extern DECLSPEC int SDLCALL SDL_ConvertAudio(SDL_AudioCVT * cvt);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	451
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	452 #define SDL_MIX_MAXVOLUME 128
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	453 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	454 * 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	455 * them, performing addition, volume adjustment, and overflow clipping.
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	456 * 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	457 * 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	458 * This is provided for convenience -- you can mix your own audio data.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	459 */
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	460 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	461 Uint32 len, int volume);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	462
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	463 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	464 * 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	465 * 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	466 * 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	467 */
1967 01e29c3e9a29 In general, fill in pointers to structures, rather than return them. Sam Lantinga <slouken@libsdl.org> parents: 1964 diff changeset	468 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	469 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	470 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	471 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	472
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	473 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	474 * \name Audio lock functions
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	475 *
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	476 * 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	477 * 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	478 * 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	479 * function or you will cause deadlock.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	480 */
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	481 /@{/
337 9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default) Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	482 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	483 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	484 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	485 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	486 /@}//Audio lock functions/
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	487
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	488 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	489 * This function shuts down audio processing and closes the audio device.
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	490 */
337 9154ec9ca3d2 Explicitly specify the SDL API calling convention (C by default) Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	491 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	492 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	493
3407 d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	494 /**
d3baf5ac4e37 Partial fix for bug #859 Sam Lantinga <slouken@libsdl.org> parents: 3021 diff changeset	495 * \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	496 */
071b6598d48f 1.3 API proposals for audio subsystem. Nothing in here is guaranteed to Ryan C. Gordon <icculus@icculus.org> parents: 1895 diff changeset	497 extern DECLSPEC int SDLCALL SDL_AudioDeviceConnected(SDL_AudioDeviceID dev);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	498
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	499
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	500 /* Ends C function definitions when using C++ */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	501 #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	502 /* INDENT-OFF */
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	503 }
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 /* INDENT-ON */
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	505 #endif
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	506 #include "close_code.h"
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	507
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	508 #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	509
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	510 /* vi: set ts=4 sw=4 expandtab: */

Mercurial > sdl-ios-xcode

annotate include/SDL_audio.h @ 5161:b3ccd1947786