static void
preproc_rgb2yuv(cv::Mat *dst,
cv::Mat *src)
{
int w = src->size().width;
int h = src->size().height;
float div = 1.0f / src_max;
for (int yi=0; yi<h; yi++) {
const SRC_TYPE *src_line = (SRC_TYPE*)src->ptr(yi);
float *dst_line = (float*)dst->ptr(yi);
for (int xi=0; xi<w; xi++) {
float b = src_line[xi*3 + bidx] * div;
float g = src_line[xi*3 + 1] * div;
float r = src_line[xi*3 + ridx] * div;
float Y = clipf(0.0f, b*0.114f + g*0.587f + r*0.299f, 1.0f);
float U = clipf(0.0f, (b-Y) * 0.492f + 0.5f, 1.0f);
float V = clipf(0.0f, (r-Y) * 0.877f + 0.5f, 1.0f);
dst_line[xi*3 + 0] = Y;
dst_line[xi*3 + 1] = U;
dst_line[xi*3 + 2] = V;
}
}
}
static void
postproc_yuv2rgb(cv::Mat *dst,
cv::Mat *src_yuv)
{
int w = dst->size().width;
int h = dst->size().height;
for (int yi=0; yi<h; yi++) {
const float *src_yuv_line = (float*)src_yuv->ptr(yi);
DST_TYPE *dst_line = (DST_TYPE*)dst->ptr(yi);
for (int xi=0; xi<w; xi++) {
float y = src_yuv_line[xi*3 + 0];
float cr = src_yuv_line[xi*3 + 1];
float cb = src_yuv_line[xi*3 + 2];
float C0 = 2.032f, C1 = -0.395f, C2 = -0.581f, C3 = 1.140f;
float b = y + (cb-0.5f)*C3;
float g = y + (cb-0.5f)*C2 + (cr-0.5f)*C1;
float r = y + (cr-0.5f)*C0;
r = clipf(0.0f, r * dst_max, dst_max);
g = clipf(0.0f, g * dst_max, dst_max);
b = clipf(0.0f, b * dst_max, dst_max);
dst_line[xi*3 + ridx] = (DST_TYPE)r;
dst_line[xi*3 + 1] = (DST_TYPE)g;
dst_line[xi*3 + bidx] = (DST_TYPE)b;
}
}
}
static void
postproc_rgb2rgb(cv::Mat *dst,
cv::Mat *src_rgb)
{
int w = dst->size().width;
int h = dst->size().height;
for (int yi=0; yi<h; yi++) {
const float *src_rgb_line = (float*)src_rgb->ptr(yi);
DST_TYPE *dst_line = (DST_TYPE*)dst->ptr(yi);
for (int xi=0; xi<w; xi++) {
float r = src_rgb_line[xi*3 + 0];
float g = src_rgb_line[xi*3 + 1];
float b = src_rgb_line[xi*3 + 2];
r = clipf(0.0f, r * dst_max, dst_max);
g = clipf(0.0f, g * dst_max, dst_max);
b = clipf(0.0f, b * dst_max, dst_max);
dst_line[xi*3 + ridx] = (DST_TYPE)r;
dst_line[xi*3 + 1] = (DST_TYPE)g;
dst_line[xi*3 + bidx] = (DST_TYPE)b;
}
}
}
static void
postproc_rgb2rgba(cv::Mat *dst,
cv::Mat *src_rgb,
cv::Mat *src_alpha,
float bkgd_r,
float bkgd_g,
float bkgd_b)
{
int w = dst->size().width;
int h = dst->size().height;
for (int yi=0; yi<h; yi++) {
const float *src_rgb_line = (float*)src_rgb->ptr(yi);
const float *src_alpha_line = (float*)src_alpha->ptr(yi);
DST_TYPE *dst_line = (DST_TYPE*)dst->ptr(yi);
for (int xi=0; xi<w; xi++) {
float r = src_rgb_line[xi*3 + 0];
float g = src_rgb_line[xi*3 + 1];
float b = src_rgb_line[xi*3 + 2];
float a = src_alpha_line[xi];
/* data = src*alpha + bkgd*(1-alpha) */
/* -src*alpha = bkgd*(1-alpha) - data */
/* src*alpha = data - bkgd*(1-alpha) */
/* src*alpha = data - bkgd + bkgd * alpha */
/* src = (data - bkgd)/alpha+bkgd */
r = (r - bkgd_r)/a + bkgd_r;
g = (g - bkgd_g)/a + bkgd_g;
b = (b - bkgd_b)/a + bkgd_b;
r = clipf(0.0f, r * dst_max, dst_max);
g = clipf(0.0f, g * dst_max, dst_max);
b = clipf(0.0f, b * dst_max, dst_max);
a = clipf(0.0f, a * dst_max, dst_max);
dst_line[xi*4 + ridx] = (DST_TYPE)r;
dst_line[xi*4 + 1] = (DST_TYPE)g;
dst_line[xi*4 + bidx] = (DST_TYPE)b;
dst_line[xi*4 + 3] = (DST_TYPE)a;
}
}
}
static void
postproc_yuv2rgba(cv::Mat *dst,
cv::Mat *src_yuv,
cv::Mat *src_alpha,
float bkgd_r,
float bkgd_g,
float bkgd_b)
{
int w = dst->size().width;
int h = dst->size().height;
for (int yi=0; yi<h; yi++) {
const float *src_yuv_line = (float*)src_yuv->ptr(yi);
const float *src_alpha_line = (float*)src_alpha->ptr(yi);
DST_TYPE *dst_line = (DST_TYPE*)dst->ptr(yi);
for (int xi=0; xi<w; xi++) {
float a = src_alpha_line[xi];
float y = src_yuv_line[xi*3 + 0];
float cr = src_yuv_line[xi*3 + 1];
float cb = src_yuv_line[xi*3 + 2];
float C0 = 2.032f, C1 = -0.395f, C2 = -0.581f, C3 = 1.140f;
float b = y + (cb-0.5f)*C3;
float g = y + (cb-0.5f)*C2 + (cr-0.5f)*C1;
float r = y + (cr-0.5f)*C0;
r = (r - bkgd_r)/a + bkgd_r;
g = (g - bkgd_g)/a + bkgd_g;
b = (b - bkgd_b)/a + bkgd_b;
r = clipf(0.0f, r * dst_max, dst_max);
g = clipf(0.0f, g * dst_max, dst_max);
b = clipf(0.0f, b * dst_max, dst_max);
a = clipf(0.0f, a * dst_max, dst_max);
dst_line[xi*4 + ridx] = (DST_TYPE)r;
dst_line[xi*4 + 1] = (DST_TYPE)g;
dst_line[xi*4 + bidx] = (DST_TYPE)b;
dst_line[xi*4 + 3] = (DST_TYPE)a;
}
}
}
void sound_SetMusicVolume(float volume)
{
// Keep volume in the range of 0.0 - 1.0
music_volume = clipf(volume, 0.0f, 1.0f);
// Change the volume of the current stream as well (if any)
if (cdStream)
{
sound_SetStreamVolume(cdStream, music_volume);
}
}
static void
preproc_rgba2yuv(cv::Mat *dst_yuv,
cv::Mat *dst_alpha,
cv::Mat *src,
float bkgd_r,
float bkgd_g,
float bkgd_b)
{
int w = src->size().width;
int h = src->size().height;
float div = 1.0f / src_max;
float alpha_coef = 1.0f / src_max;
for (int yi=0; yi<h; yi++) {
const SRC_TYPE *src_line = (SRC_TYPE*)src->ptr(yi);
const SRC_TYPE *src_line0 = NULL, *src_line2 = NULL;
if (yi != 0) {
src_line0 = (SRC_TYPE*)src->ptr(yi-1);
}
if (yi != h-1) {
src_line2 = (SRC_TYPE*)src->ptr(yi+1);
}
float *dst_yuv_line = (float*)dst_yuv->ptr(yi);
float *dst_alpha_line = (float*)dst_alpha->ptr(yi);
for (int xi=0; xi<w; xi++) {
float r = src_line[xi*4 + ridx] * div;
float g = src_line[xi*4 + 1] * div;
float b = src_line[xi*4 + bidx] * div;
SRC_TYPE a = src_line[xi*4 + 3];
if (a == 0) {
r = bkgd_r;
g = bkgd_g;
b = bkgd_b;
#if 0
if (yi == 0 || yi == h-1 || xi == 0 || xi == w-1) {
/* xx */
r = bkgd_r;
g = bkgd_g;
b = bkgd_b;
} else {
/* set nearest non-transparental color */
SRC_TYPE near_a;
bool set = false;
if (!set) set = set_nearest_nontransparent<SRC_TYPE,ridx,bidx>(&r, &g, &b, src_line0, xi-1);
if (!set) set = set_nearest_nontransparent<SRC_TYPE,ridx,bidx>(&r, &g, &b, src_line0, xi);
if (!set) set = set_nearest_nontransparent<SRC_TYPE,ridx,bidx>(&r, &g, &b, src_line0, xi+1);
if (!set) set = set_nearest_nontransparent<SRC_TYPE,ridx,bidx>(&r, &g, &b, src_line, xi-1);
if (!set) set = set_nearest_nontransparent<SRC_TYPE,ridx,bidx>(&r, &g, &b, src_line, xi+1);
if (!set) set = set_nearest_nontransparent<SRC_TYPE,ridx,bidx>(&r, &g, &b, src_line2, xi-1);
if (!set) set = set_nearest_nontransparent<SRC_TYPE,ridx,bidx>(&r, &g, &b, src_line2, xi);
if (!set) set = set_nearest_nontransparent<SRC_TYPE,ridx,bidx>(&r, &g, &b, src_line2, xi+1);
if (set) {
r *= div;
g *= div;
b *= div;
} else {
r = bkgd_r;
g = bkgd_g;
b = bkgd_b;
}
}
#endif
} else {
SRC_TYPE ra = src_max - a;
r = r * (a * alpha_coef) + bkgd_r * (ra * alpha_coef);
g = g * (a * alpha_coef) + bkgd_g * (ra * alpha_coef);
b = b * (a * alpha_coef) + bkgd_b * (ra * alpha_coef);
}
float Y = clipf(0.0f, b*0.114f + g*0.587f + r*0.299f, 1.0f);
float U = clipf(0.0f, (b-Y) * 0.492f + 0.5f, 1.0f);
float V = clipf(0.0f, (r-Y) * 0.877f + 0.5f, 1.0f);
dst_yuv_line[xi*3 + 0] = Y;
dst_yuv_line[xi*3 + 1] = U;
dst_yuv_line[xi*3 + 2] = V;
dst_alpha_line[xi] = a * div;
}
}
}
