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channelmix: construct matrix and use coefficients

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This commit is contained in:
Wim Taymans 2018-09-18 17:06:47 +02:00
parent f57d1125f6
commit 64c38e3a6f
3 changed files with 295 additions and 80 deletions
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96
spa/plugins/audioconvert/channelmix-ops.c
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@ -68,10 +68,8 @@ channelmix_f32_n_m(void *data, int n_dst, void *dst[n_dst],
for (n = 0; n < n_samples; n++) {
for (i = 0; i < n_dst; i++) {
float sum = 0.0f;
for (j = 0; j < n_src; j++)
sum += s[j][n] * m[i * n_src + j];
d[i][n] = sum;
}
}
@ -233,9 +231,9 @@ channelmix_f32_5p1_2(void *data, int n_dst, void *dst[n_dst],
float **s = (float **) src;
float *m = matrix;
float v = m[0];
const float clev = 0.7071f;
const float slev = 0.7071f;
const float llev = 0.5f;
const float clev = m[2];
const float llev = m[3];
const float slev = m[4];
if (v <= VOLUME_MIN) {
memset(d[0], 0, n_bytes);
@ -284,6 +282,44 @@ channelmix_f32_5p1_3p1(void *data, int n_dst, void *dst[n_dst],
}
}
/* FL+FR+FC+LFE+SL+SR -> FL+FR+RL+RR*/
static void
channelmix_f32_5p1_4(void *data, int n_dst, void *dst[n_dst],
int n_src, const void *src[n_src], void *matrix, int n_bytes)
{
int i, n, n_samples;
float **d = (float **) dst;
float **s = (float **) src;
float *m = matrix;
float v = m[0];
const float clev = m[2];
const float llev = m[3];
n_samples = n_bytes / sizeof(float);
if (v <= VOLUME_MIN) {
for (i = 0; i < n_dst; i++)
memset(d[i], 0, n_bytes);
}
else if (v == VOLUME_NORM) {
for (n = 0; n < n_samples; n++) {
float ctr = s[2][n] * clev + s[3][n] * llev;
d[0][n] = s[0][n] + ctr;
d[1][n] = s[1][n] + ctr;
d[2][n] = s[4][n];
d[3][n] = s[5][n];
}
}
else {
for (n = 0; n < n_samples; n++) {
float ctr = s[2][n] * clev + s[3][n] * llev;
d[0][n] = (s[0][n] + ctr) * v;
d[1][n] = (s[1][n] + ctr) * v;
d[2][n] = s[4][n] * v;
d[3][n] = s[5][n] * v;
}
}
}
#define MASK_7_1 _M(FL)|_M(FR)|_M(FC)|_M(LFE)|_M(SL)|_M(SR)|_M(RL)|_M(RR)
/* FL+FR+FC+LFE+SL+SR+RL+RR -> FL+FR */
@ -296,9 +332,9 @@ channelmix_f32_7p1_2(void *data, int n_dst, void *dst[n_dst],
float **s = (float **) src;
float *m = matrix;
float v = m[0];
const float clev = 0.7071f;
const float slev = 0.7071f;
const float llev = 0.5f;
const float clev = m[2];
const float llev = m[3];
const float slev = m[4];
if (v <= VOLUME_MIN) {
memset(d[0], 0, n_bytes);
@ -347,44 +383,6 @@ channelmix_f32_7p1_3p1(void *data, int n_dst, void *dst[n_dst],
}
}
/* FL+FR+FC+LFE+SL+SR -> FL+FR+RL+RR*/
static void
channelmix_f32_5p1_4(void *data, int n_dst, void *dst[n_dst],
int n_src, const void *src[n_src], void *matrix, int n_bytes)
{
int i, n, n_samples;
float **d = (float **) dst;
float **s = (float **) src;
float *m = matrix;
float v = m[0];
const float clev = 0.7071f;
const float llev = 0.5f;
n_samples = n_bytes / sizeof(float);
if (v <= VOLUME_MIN) {
for (i = 0; i < n_dst; i++)
memset(d[i], 0, n_bytes);
}
else if (v == VOLUME_NORM) {
for (n = 0; n < n_samples; n++) {
float ctr = s[2][n] * clev + s[3][n] * llev;
d[0][n] = s[0][n] + ctr;
d[1][n] = s[1][n] + ctr;
d[2][n] = s[4][n];
d[3][n] = s[5][n];
}
}
else {
for (n = 0; n < n_samples; n++) {
float ctr = s[2][n] * clev + s[3][n] * llev;
d[0][n] = (s[0][n] + ctr) * v;
d[1][n] = (s[1][n] + ctr) * v;
d[2][n] = s[4][n] * v;
d[3][n] = s[5][n] * v;
}
}
}
/* FL+FR+FC+LFE+SL+SR+RL+RR -> FL+FR+RL+RR*/
static void
channelmix_f32_7p1_4(void *data, int n_dst, void *dst[n_dst],
@ -395,9 +393,9 @@ channelmix_f32_7p1_4(void *data, int n_dst, void *dst[n_dst],
float **s = (float **) src;
float *m = matrix;
float v = m[0];
const float clev = 0.7071f;
const float slev = 0.7071f;
const float llev = 0.5f;
const float clev = m[2];
const float llev = m[3];
const float slev = m[4];
n_samples = n_bytes / sizeof(float);
if (v <= VOLUME_MIN) {