add bfin ice

[ICEs.git] / 218158 / af_volnorm.i.2

typedef struct af_data_s {
	int format;
} af_data_t;
typedef struct af_info_s {
	const char *info;
	const char *name;
	const char *author;
	const char *comment;
	const int flags;
	int (*open) (struct af_instance_s * vf);
} af_info_t;
typedef struct af_instance_s {
	af_data_t *(*play) (struct af_instance_s * af, af_data_t * data);
	void *setup;
	af_data_t *data;
} af_instance_t;
typedef struct af_volume_s {
	int method;
	float mul;
	struct {
		float avg;
		int len;
	} mem[128];
	float mid_s16;
} af_volnorm_t;
static void method2_int16(af_volnorm_t * s, af_data_t * c)
{
	register int i = 0;
	float avg = 0.0;
	int totallen = 0;
	for (i = 0; i < 128; i++) {
		avg += s->mem[i].avg * (float)s->mem[i].len;
		totallen += s->mem[i].len;
	}
	if (totallen > 32000)
		if (avg >= (32767 * 0.01))
			s->mul = s->mid_s16 / avg;
}
static af_data_t *play(struct af_instance_s *af, af_data_t * data)
{
	af_volnorm_t *s = af->setup;
	if (af->data->format == (((0 << 2) | (0 << 1) | (1 << 3) | (0 << 0))))
		if (s->method)
			method2_int16(s, data);
}
static int af_open(af_instance_t * af)
{
	af->play = play;
}

af_info_t af_info_volnorm = {
	"Volume normalizer filter", "volnorm",
	    "Alex Beregszaszi & Pierre Lombard", "", 0x00000001, af_open
};