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FS-10050: [core] chromakey

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Anthony Minessale committed 2017-03-01 20:01:36 -06:00
1 parent fa7f10c02b
commit dbbe00332b
3 files changed
+129 -21
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src/switch_core_video.c
+56 -4
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@@ -302,11 +302,58 @@ SWITCH_DECLARE(void) switch_img_free(switch_image_t **img)
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif
SWITCH_DECLARE(void) switch_img_patch_rgb(switch_image_t *IMG, switch_image_t *img, int x, int y, switch_bool_t noalpha)
{
int i;
if (img->fmt == SWITCH_IMG_FMT_ARGB && IMG->fmt == SWITCH_IMG_FMT_ARGB) {
int max_w = MIN(img->d_w, IMG->d_w - abs(x));
int max_h = MIN(img->d_h, IMG->d_h - abs(y));
int j;
uint8_t alpha;
switch_rgb_color_t *rgb, *RGB;
for (i = 0; i < max_h; i++) {
for (j = 0; j < max_w; j++) {
rgb = (switch_rgb_color_t *)(img->planes[SWITCH_PLANE_PACKED] + i * img->stride[SWITCH_PLANE_PACKED] + j * 4);
RGB = (switch_rgb_color_t *)(IMG->planes[SWITCH_PLANE_PACKED] + (y + i) * IMG->stride[SWITCH_PLANE_PACKED] + (x + j) * 4);
alpha = rgb->a;
if (noalpha && RGB->a != 0) {
continue;
}
if (alpha == 255) {
*RGB = *rgb;
} else if (alpha != 0) {
int tmp_a;
if (RGB->a != 255) {
tmp_a = ((RGB->a * (255 - alpha)) >> 8) + ((rgb->a * alpha) >> 8);
RGB->a = RGB->a > tmp_a ? RGB->a : tmp_a;
}
RGB->r = ((RGB->r * (255 - alpha)) >> 8) + ((rgb->r * alpha) >> 8);
RGB->g = ((RGB->g * (255 - alpha)) >> 8) + ((rgb->g * alpha) >> 8);
RGB->b = ((RGB->b * (255 - alpha)) >> 8) + ((rgb->b * alpha) >> 8);
}
}
}
}
}
SWITCH_DECLARE(void) switch_img_patch(switch_image_t *IMG, switch_image_t *img, int x, int y)
{
int i, len, max_h;
int xoff = 0, yoff = 0;
if (img->fmt == SWITCH_IMG_FMT_ARGB && IMG->fmt == SWITCH_IMG_FMT_ARGB) {
switch_img_patch_rgb(IMG, img, x, y, SWITCH_FALSE);
return;
}
switch_assert(IMG->fmt == SWITCH_IMG_FMT_I420);
if (img->fmt == SWITCH_IMG_FMT_ARGB) {
@@ -932,7 +979,7 @@ SWITCH_DECLARE(void) switch_img_chromakey(switch_image_t *img, switch_rgb_color_
static inline void switch_img_draw_pixel(switch_image_t *img, int x, int y, switch_rgb_color_t *color)
{
#ifdef SWITCH_HAVE_YUV
switch_yuv_color_t yuv;
switch_yuv_color_t yuv = {0};
if (x < 0 || y < 0 || x >= img->d_w || y >= img->d_h) return;
@@ -1163,9 +1210,14 @@ SWITCH_DECLARE(void) switch_color_set_rgb(switch_rgb_color_t *color, const char
#ifdef SWITCH_HAVE_YUV
static inline void switch_color_rgb2yuv(switch_rgb_color_t *rgb, switch_yuv_color_t *yuv)
{
yuv->y = (uint8_t)(((rgb->r * 4897) >> 14) + ((rgb->g * 9611) >> 14) + ((rgb->b * 1876) >> 14));
yuv->u = (uint8_t)(- ((rgb->r * 2766) >> 14) - ((5426 * rgb->g) >> 14) + rgb->b / 2 + 128);
yuv->v = (uint8_t)(rgb->r / 2 -((6855 * rgb->g) >> 14) - ((rgb->b * 1337) >> 14) + 128);
yuv->y = ( ( 66 * rgb->r + 129 * rgb->g + 25 * rgb->b + 128) >> 8) + 16;
yuv->u = ( ( -38 * rgb->r - 74 * rgb->g + 112 * rgb->b + 128) >> 8) + 128;
yuv->v = ( ( 112 * rgb->r - 94 * rgb->g - 18 * rgb->b + 128) >> 8) + 128;
//yuv->y = (uint8_t)(((rgb->r * 4897) >> 14) + ((rgb->g * 9611) >> 14) + ((rgb->b * 1876) >> 14));
//yuv->u = (uint8_t)(- ((rgb->r * 2766) >> 14) - ((5426 * rgb->g) >> 14) + rgb->b / 2 + 128);
//yuv->v = (uint8_t)(rgb->r / 2 -((6855 * rgb->g) >> 14) - ((rgb->b * 1337) >> 14) + 128);
}
#endif