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FS-7500: refactor and implemnt patch_rect 

fix stride side when patching strided img
implement switch_img_patch_rect to patch partial of an img to a bigger IMG
refactor switch_img_copy_rect to support ARGB
This commit is contained in:
Seven Du 2015-04-22 11:49:41 +08:00 committed by Michael Jerris
parent 80694ad547
commit 57016a7926
2 changed files with 185 additions and 25 deletions
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126
src/include/switch_core_video.h
View File

@ -140,7 +140,7 @@ SWITCH_DECLARE(switch_image_t *)switch_img_wrap(switch_image_t *img,
unsigned int d_w,
unsigned int d_h,
unsigned int align,
unsigned char *img_data);
unsigned char *img_data);
/*!\brief Set the rectangle identifying the displayed portion of the image
@ -162,9 +162,34 @@ SWITCH_DECLARE(int) switch_img_set_rect(switch_image_t *img,
unsigned int w,
unsigned int h);
/*!\brief patch a small img to a big IMG at position x,y
*
* Both IMG and img must be non-NULL
*
* \param[in] IMG The BIG Image descriptor
* \param[in] img The small Image descriptor
* \param[in] x Leftmost pos to patch to
* \param[in] y Topmost pos to patch to
*/
SWITCH_DECLARE(void) switch_img_patch(switch_image_t *IMG, switch_image_t *img, int x, int y);
/*!\brief patch part of a small img (x,y,w,h) to a big IMG at position X,Y
*
* Both IMG and img must be non-NULL
*
* \param[in] IMG The BIG Image descriptor
* \param[in] X Leftmost pos to patch to IMG
* \param[in] Y Topmost pos to patch to IMG
* \param[in] img The small Image descriptor
* \param[in] x Leftmost pos to be read from img
* \param[in] y Topmost pos to be read from
* \param[in] w Max width to be read from img
* \param[in] h Max height to be read from img
*/
SWITCH_DECLARE(void) switch_img_patch_rect(switch_image_t *IMG, int X, int Y, switch_image_t *img, uint32_t x, uint32_t y, uint32_t w, uint32_t h);
/*!\brief Copy image to a new image
*
* if new_img is NULL, a new image is allocated
@ -173,6 +198,7 @@ SWITCH_DECLARE(void) switch_img_patch(switch_image_t *IMG, switch_image_t *img,
* else, copy the img data to the new_img
*
* \param[in] img Image descriptor
* \param[out] new_img New Image descriptor, NULL if out of memory
*/
SWITCH_DECLARE(void) switch_img_copy(switch_image_t *img, switch_image_t **new_img);
@ -184,6 +210,8 @@ SWITCH_DECLARE(void) switch_img_copy(switch_image_t *img, switch_image_t **new_i
* be referenced upside-down.
*
* \param[in] img Image descriptor
*
* \return 0 if the requested rectangle is valid, nonzero otherwise.
*/
SWITCH_DECLARE(void) switch_img_flip(switch_image_t *img);
@ -199,22 +227,104 @@ SWITCH_DECLARE(void) switch_img_draw_text(switch_image_t *IMG, int x, int y, swi
SWITCH_DECLARE(void) switch_img_add_text(void *buffer, int w, int x, int y, char *s);
SWITCH_DECLARE(switch_image_t *) switch_img_copy_rect(switch_image_t *img, int x, int y, int w, int h);
/*!\brief Copy part of an image to a new image
*
*
* \param[in] img Image descriptor
* \param[in] x Leftmost pos to be read from
* \param[in] y Topmost pos to be read from
* \param[in] w Max width to be read from
* \param[in] h Max height to be read from
*
* \return NULL if failed to copy, otherwise a valid image descriptor.
*/
SWITCH_DECLARE(switch_image_t *) switch_img_copy_rect(switch_image_t *img, uint32_t x, uint32_t y, uint32_t w, uint32_t h);
/*!\brief Fill image with color
*
* \param[in] img Image descriptor
* \param[in] x Leftmost pos to be read from
* \param[in] y Topmost pos to be read from
* \param[in] w Max width to be read from
* \param[in] h Max height to be read from
* \param[in] color RGB color
*/
SWITCH_DECLARE(void) switch_img_fill(switch_image_t *img, int x, int y, int w, int h, switch_rgb_color_t *color);
/*!\brief Draw a pixel on an image
*
* \param[in] img Image descriptor
* \param[in] x leftmost pos
* \param[in] y topmost pos
* \param[in] color YUV color
*/
SWITCH_DECLARE(void) switch_img_draw_pixel(switch_image_t *img, int x, int y, switch_yuv_color_t *color);
/*!\brief Set RGB color with a string
*
* Color string should be in #RRGGBB format
*
* \param[out] color RGB color pointer
* \param[in] color_str Color string in #RRGGBB format
*/
SWITCH_DECLARE(void) switch_color_set_rgb(switch_rgb_color_t *color, const char *color_str);
/*!\brief Set YUV color with a string
*
* Color string should be in #RRGGBB format
*
* \param[out] color YUV color pointer
* \param[in] color_str Color string in #RRGGBB format
*/
SWITCH_DECLARE(void) switch_color_set_yuv(switch_yuv_color_t *color, const char *color_str);
/*!\brief Convert RGB color to YUV
*
* \param[in] rgb RGB color pointer
* \param[out] yuv YUV color pointer
*/
SWITCH_DECLARE(void) switch_color_rgb2yuv(switch_rgb_color_t *rgb, switch_yuv_color_t *yuv);
/*!\brief Convert YUV color to RGB
*
* \param[in] yuv YUV color pointer
* \param[out] rgb RGB color pointer
*/
SWITCH_DECLARE(void) switch_color_yuv2rgb(switch_yuv_color_t *yuv, switch_rgb_color_t *rgb);
/*!\brief Created a text handle
*
* \param[out] handleP Pointer to the text handle pointer
* \param[in] font_family Font family
* \param[in] font_color Font color in #RRGGBB format
* \param[in] bgcolor Background color in #RRGGBB format
* \param[in] font_size Font size in point
* \param[in] angle Angle to rotate
* \param[in] pool APR memory pool
*/
SWITCH_DECLARE(switch_status_t) switch_img_txt_handle_create(switch_img_txt_handle_t **handleP, const char *font_family,
const char *font_color, const char *bgcolor, uint16_t font_size, double angle, switch_memory_pool_t *pool);
/*!\brief Free a text handle
*
* \param[in] handleP Pointer to the text handle pointer
*/
SWITCH_DECLARE(void) switch_img_txt_handle_destroy(switch_img_txt_handle_t **handleP);
/*!\brief Render text to an img
*
* \param[in] handle Pointer to the text handle pointer
* \param[in] img The image to be render text on
* \param[in] x Leftmost position
* \param[in] y Topmost position
* \param[in] text Text to render
* \param[in] font_family Font to use, NULL to use the handle font
* \param[in] font_color Font color, NULL to use the handle color
* \param[in] bgcolor Background color, NULL for transparency
* \param[in] font_size Font size in point
* \param[in] angle Angle to rotate
*/
SWITCH_DECLARE(switch_status_t) switch_img_txt_handle_render(switch_img_txt_handle_t *handle, switch_image_t *img,
int x, int y, const char *text,
const char *font_family, const char *font_color, const char *bgcolor, uint16_t font_size, double angle);
@ -232,6 +342,16 @@ SWITCH_DECLARE(void) switch_img_get_yuv_pixel(switch_image_t *img, switch_yuv_co
SWITCH_DECLARE(void) switch_img_get_rgb_pixel(switch_image_t *img, switch_rgb_color_t *rgb, int x, int y);
/*!\brief put a small img over a big IMG at position x,y, with alpha transparency
*
* Both IMG and img must be non-NULL
*
* \param[in] IMG The BIG Image descriptor
* \param[in] img The small Image descriptor
* \param[in] x Leftmost pos
* \param[in] y Topmost pos
* \param[in] alpha Alaha value from 0(completely transparent) to 255(opaque)
*/
SWITCH_DECLARE(void) switch_img_overlay(switch_image_t *IMG, switch_image_t *img, int x, int y, uint8_t alpha);
SWITCH_DECLARE(switch_status_t) switch_img_scale(switch_image_t *src, switch_image_t **destP, int width, int height);

84
src/switch_core_video.c
View File

@ -121,7 +121,6 @@ SWITCH_DECLARE(void) switch_img_free(switch_image_t **img)
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif
// simple implementation to patch a small img to a big IMG at position x,y
SWITCH_DECLARE(void) switch_img_patch(switch_image_t *IMG, switch_image_t *img, int x, int y)
{
int i, len, max_h;
@ -139,11 +138,11 @@ SWITCH_DECLARE(void) switch_img_patch(switch_image_t *IMG, switch_image_t *img,
for (i = 0; i < max_h; i++) {
for (j = 0; j < max_w; j++) {
alpha = img->planes[SWITCH_PLANE_PACKED][i * img->d_w * 4 + j * 4];
alpha = img->planes[SWITCH_PLANE_PACKED][i * img->stride[SWITCH_PLANE_PACKED] + j * 4];
// printf("%d, %d alpha: %d\n", j, i, alpha);
if (alpha > 127) { // todo: mux alpha with the underlying pixel ?
rgb_color = (switch_rgb_color_t *)(img->planes[SWITCH_PLANE_PACKED] + i * img->d_w * 4 + j * 4 + 1);
rgb_color = (switch_rgb_color_t *)(img->planes[SWITCH_PLANE_PACKED] + i * img->stride[SWITCH_PLANE_PACKED] + j * 4 + 1);
switch_color_rgb2yuv(rgb_color, &yuv_color);
switch_img_draw_pixel(IMG, x + j, y + i, &yuv_color);
}
@ -185,6 +184,32 @@ SWITCH_DECLARE(void) switch_img_patch(switch_image_t *IMG, switch_image_t *img,
}
}
SWITCH_DECLARE(void) switch_img_patch_rect(switch_image_t *IMG, int X, int Y, switch_image_t *img, uint32_t x, uint32_t y, uint32_t w, uint32_t h)
{
switch_image_t *tmp;
uint8_t *data;
if (x >= img->d_w || y >= img->d_h) return;
if (!(img->fmt & SWITCH_IMG_FMT_PLANAR)) {
data = img->planes[SWITCH_PLANE_PACKED];
} else {
data = img->planes[SWITCH_PLANE_Y];
}
tmp = (switch_image_t *)vpx_img_wrap(NULL, img->fmt, img->d_w, img->d_h, 1, data);
if (!tmp) return;
w = MIN(img->d_w - x, w);
h = MIN(img->d_h - y, h);
if (!switch_img_set_rect(tmp, x, y, w, h)) {
switch_img_patch(IMG, tmp, X, Y);
}
switch_img_free(&tmp);
}
SWITCH_DECLARE(void) switch_img_copy(switch_image_t *img, switch_image_t **new_img)
{
int i = 0;
@ -216,38 +241,53 @@ SWITCH_DECLARE(void) switch_img_copy(switch_image_t *img, switch_image_t **new_i
memcpy((*new_img)->planes[SWITCH_PLANE_V] + (*new_img)->stride[SWITCH_PLANE_V] * i, img->planes[SWITCH_PLANE_V] + img->stride[SWITCH_PLANE_V] * i, img->d_w / 2);
}
} else if (img->fmt == SWITCH_IMG_FMT_ARGB) {
memcpy((*new_img)->planes[SWITCH_PLANE_PACKED], img->planes[SWITCH_PLANE_PACKED], img->d_w * img->d_h * 4);
if (img->stride[SWITCH_PLANE_PACKED] == img->d_w * 4 &&
(*new_img)->stride[SWITCH_PLANE_PACKED] == (*new_img)->d_w * 4) { // fast copy
memcpy((*new_img)->planes[SWITCH_PLANE_PACKED], img->planes[SWITCH_PLANE_PACKED], img->d_w * img->d_h * 4);
} else if (img->stride[SWITCH_PLANE_PACKED] > img->d_w * 4) {
uint8_t *dst = (*new_img)->planes[SWITCH_PLANE_PACKED];
uint8_t *src = img->planes[SWITCH_PLANE_PACKED];
int i;
for (i = 0; i < img->d_h; i++) {
memcpy(dst, src, img->d_w * 4);
dst += (*new_img)->stride[SWITCH_PLANE_PACKED];
src += img->stride[SWITCH_PLANE_PACKED];
}
} else { //should not happen
abort();
}
}
}
SWITCH_DECLARE(switch_image_t *) switch_img_copy_rect(switch_image_t *img, int x, int y, int w, int h)
SWITCH_DECLARE(switch_image_t *) switch_img_copy_rect(switch_image_t *img, uint32_t x, uint32_t y, uint32_t w, uint32_t h)
{
switch_image_t *new_img = NULL;
int i = 0;
int len;
switch_image_t *new_img = NULL, *tmp;
uint8_t *data;
switch_assert(img);
switch_assert(x >= 0 && y >= 0 && w >= 0 && h >= 0);
if (!(img->fmt == SWITCH_IMG_FMT_I420)) return NULL;
if (x >= img->d_w || y >= img->d_h) return NULL;
new_img = switch_img_alloc(NULL, SWITCH_IMG_FMT_I420, w, h, 1);
if (new_img == NULL) return NULL;
len = MIN(img->d_w - x, w);
if (len <= 0) return NULL;
for (i = 0; i < (img->d_h - y) && i < h; i++) {
memcpy(new_img->planes[SWITCH_PLANE_Y] + new_img->stride[SWITCH_PLANE_Y] * i, img->planes[SWITCH_PLANE_Y] + img->stride[SWITCH_PLANE_Y] * (y + i) + x, len);
if (!(img->fmt & SWITCH_IMG_FMT_PLANAR)) {
data = img->planes[SWITCH_PLANE_PACKED];
} else {
data = img->planes[SWITCH_PLANE_Y];
}
len /= 2;
tmp = (switch_image_t *)vpx_img_wrap(NULL, img->fmt, img->d_w, img->d_h, 1, data);
if (!tmp) return NULL;
for (i = 0; i < (img->d_h - y) && i < h; i += 2) {
memcpy(new_img->planes[SWITCH_PLANE_U] + new_img->stride[SWITCH_PLANE_U] * i / 2, img->planes[SWITCH_PLANE_U] + img->stride[SWITCH_PLANE_U] * (y + i) / 2 + x / 2, len);
memcpy(new_img->planes[SWITCH_PLANE_V] + new_img->stride[SWITCH_PLANE_V] * i / 2, img->planes[SWITCH_PLANE_V] + img->stride[SWITCH_PLANE_V] * (y + i) / 2 + x / 2, len);
w = MIN(img->d_w - x, w);
h = MIN(img->d_h - y, h);
if (!switch_img_set_rect(tmp, x, y, w, h)) {
switch_img_copy(tmp, &new_img);
}
switch_img_free(&tmp);
return new_img;
}