mixer68.h File Reference

Detailed Description

audio mixer

Author:: Benjamin Gerard <ben@sashipa.com>

Date:: 1999/05/17

Id: mixer68.h,v 2.1 2003/08/26 23:14:02 benjihan Exp

#include "emu68/type68.h"

Go to the source code of this file.

Constants for PCM sign transformation.

#define MIXER68_SAME_SIGN   0x00000000

No channel.

#define MIXER68_CHANGE_LEFT_CHANNEL_SIGN   0x00008000

Left channel.

#define MIXER68_CHANGE_RIGHT_CHANNEL_SIGN   0x80000000

Right channel.

#define MIXER68_CHANGE_SIGN   0x80008000

Both channels.

Functions

void SC68mixer_stereo_16_LR (u32 *dest, u32 *src, int nb, const u32 sign)

Copy 16-bit-stereo PCM with optionnal sign change.

void SC68mixer_stereo_16_RL (u32 *dest, u32 *src, int nb, const u32 sign)

Copy 16-bit-stereo PCM with channel swapping and optionnal sign change.

void SC68mixer_stereo_FL_LR (float *dest, u32 *src, int nb, const u32 sign, const float norm)

Copy 16-bit-stereo PCM into normalized float-stereo (-norm..+norm).

void SC68mixer_dup_L_to_R (u32 *dest, u32 *src, int nb, const u32 sign)

Copy left channel of 16-bit stereo PCM into L/R channels with optionnal sign change.

void SC68mixer_dup_R_to_L (u32 *dest, u32 *src, int nb, const u32 sign)

Copy right channel of 16-bit stereo PCM into L/R channels with optionnal sign change.

void SC68mixer_blend_LR (u32 *dest, u32 *src, int nb, int factor, const u32 sign_r, const u32 sign_w)

Copy 16-bit-stereo PCM with L/R blending and optionnal sign change.

void SC68mixer_mult_LR (u32 *dest, u32 *src, int nb, const int ml, const int mr, const u32 sign_r, const u32 sign_w)

Copy 16-bit-stereo PCM with L/R amplitude factor and optionnal sign change.

void SC68mixer_fill (u32 *dest, int nb, const u32 sign)

Fill 16-bit-stereo buffer with sign value (RRRRLLLL).