haiku/headers/os/game/GameSoundDefs.h

//------------------------------------------------------------------------------
//	Copyright (c) 2001-2002, OpenBeOS
//
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//	copy of this software and associated documentation files (the "Software"),
//	to deal in the Software without restriction, including without limitation
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//	and/or sell copies of the Software, and to permit persons to whom the
//	Software is furnished to do so, subject to the following conditions:
//
//	The above copyright notice and this permission notice shall be included in
//	all copies or substantial portions of the Software.
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//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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//	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
//	DEALINGS IN THE SOFTWARE.
//
//	File Name:		GameSound.cpp
//	Author:			Christopher ML Zumwalt May (cdzumwalt@dsl-only.net)
//	Description:	Declarations for game sounds
//------------------------------------------------------------------------------

#if !defined(_GAME_SOUND_DEFS_H)
#define _GAME_SOUND_DEFS_H

#include <SupportDefs.h>

typedef int32 gs_id;

#define B_GS_CUR_API_VERSION B_BEOS_VERSION
#define B_GS_MIN_API_VERSION 0x100

//	invalid sound handle
#define B_GS_INVALID_SOUND ((gs_id)-1)

//	gs_id for the main mix buffer
#define B_GS_MAIN_SOUND ((gs_id)-2)


enum	//fixme	renumber to real error messages
{
	B_GS_BAD_HANDLE = -99999,
	B_GS_NO_SOUNDS,
	B_GS_NO_HARDWARE,
	B_GS_ALREADY_COMMITTED,
	B_GS_READ_ONLY_VALUE
};


struct gs_audio_format
{		/* same as media_raw_audio_format */
	enum format {	/* for "format" */
		B_GS_U8 = 0x11,			/* 128 == mid, 1 == bottom, 255 == top */
		B_GS_S16 = 0x2,			/* 0 == mid, -32767 == bottom, +32767 == top */
		B_GS_F = 0x24,			/* 0 == mid, -1.0 == bottom, 1.0 == top */
		B_GS_S32 = 0x4			/* 0 == mid, 0x80000001 == bottom, 0x7fffffff == top */
	};
	float		frame_rate;
	uint32		channel_count;		/* 1 or 2, mostly */
	uint32		format;				/* for compressed formats, go to media_encoded_audio_format */
	uint32		byte_order;			/* 2 for little endian, 1 for big endian */
	size_t		buffer_size;		/* size of each buffer -- NOT GUARANTEED */
};


//	
enum gs_attributes
{
	B_GS_NO_ATTRIBUTE = 0,			//	when there is no attribute
	B_GS_MAIN_GAIN = 1,				//	0 == 0 dB, -6.0 == -6 dB (gs_id ignored)
	B_GS_CD_THROUGH_GAIN,			//	0 == 0 dB, -12.0 == -12 dB (gs_id ignored)
										//	but which CD?
	B_GS_GAIN = 128,				//	0 == 0 dB, -1.0 == -1 dB, +10.0 == +10 dB
	B_GS_PAN,						//	0 == middle, -1.0 == left, +1.0 == right
	B_GS_SAMPLING_RATE,				//	44100.0 == 44.1 kHz
	B_GS_LOOPING,					//	0 == no
	B_GS_FIRST_PRIVATE_ATTRIBUTE = 90000,
	B_GS_FIRST_USER_ATTRIBUTE = 100000
};
struct gs_attribute
{
		int32		attribute;		//	which attribute
		bigtime_t	duration;		//	how long of time to ramp over for the change
		float		value;			//	where the value stops changing
		uint32		flags;			//	whatever flags are for the attribute
};
struct gs_attribute_info
{
		int32		attribute;
		float		granularity;
		float		minimum;
		float		maximum;
};


#endif	//	_GAME_SOUND_DEFS_H