vgmstream/src/base/mixing_priv.h

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2023-07-30 23:47:50 +02:00
#ifndef _MIXING_PRIV_H_
#define _MIXING_PRIV_H_
#include "../vgmstream.h"
#define VGMSTREAM_MAX_MIXING 512
/* mixing info */
typedef enum {
MIX_SWAP,
MIX_ADD,
MIX_ADD_COPY,
MIX_VOLUME,
MIX_LIMIT,
MIX_UPMIX,
MIX_DOWNMIX,
MIX_KILLMIX,
MIX_FADE
} mix_command_t;
typedef struct {
mix_command_t command;
/* common */
int ch_dst;
int ch_src;
float vol;
/* fade envelope */
float vol_start; /* volume from pre to start */
float vol_end; /* volume from end to post */
char shape; /* curve type */
int32_t time_pre; /* position before time_start where vol_start applies (-1 = beginning) */
int32_t time_start; /* fade start position where vol changes from vol_start to vol_end */
int32_t time_end; /* fade end position where vol changes from vol_start to vol_end */
int32_t time_post; /* position after time_end where vol_end applies (-1 = end) */
} mix_command_data;
typedef struct {
int mixing_channels; /* max channels needed to mix */
int output_channels; /* resulting channels after mixing */
int mixing_on; /* mixing allowed */
int mixing_count; /* mixing number */
size_t mixing_size; /* mixing max */
mix_command_data mixing_chain[VGMSTREAM_MAX_MIXING]; /* effects to apply (could be alloc'ed but to simplify...) */
float* mixbuf; /* internal mixing buffer */
/* fades only apply at some points, other mixes are active */
int has_non_fade;
int has_fade;
} mixing_data;
#endif