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[core] add switch_img_read_png_from_memory

This commit is contained in:
Seven Du 2020-04-25 17:50:31 +08:00 committed by Andrey Volk
parent b18ea498df
commit 96562bcc48
2 changed files with 51 additions and 23 deletions
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1
src/include/switch_core_video.h
View File

@ -390,6 +390,7 @@ SWITCH_DECLARE(void) switch_img_patch_hole(switch_image_t *IMG, switch_image_t *
SWITCH_DECLARE(switch_status_t) switch_png_patch_img(switch_png_t *use_png, switch_image_t *img, int x, int y);
SWITCH_DECLARE(switch_image_t *) switch_img_read_png(const char *file_name, switch_img_fmt_t img_fmt);
SWITCH_DECLARE(switch_image_t *) switch_img_read_png_from_memory(void *mem, size_t size, switch_img_fmt_t img_fmt);
SWITCH_DECLARE(switch_status_t) switch_img_write_png(switch_image_t *img, char *file_name);
SWITCH_DECLARE(switch_status_t) switch_png_open(switch_png_t **pngP, const char *file_name);
SWITCH_DECLARE(void) switch_png_free(switch_png_t **pngP);

73
src/switch_core_video.c
View File

@ -2412,66 +2412,88 @@ SWITCH_DECLARE(switch_status_t) switch_png_patch_img(switch_png_t *use_png, swit
#ifdef PNG_SIMPLIFIED_READ_SUPPORTED /* available from libpng 1.6.0 */
SWITCH_DECLARE(switch_image_t *) switch_img_read_png(const char* file_name, switch_img_fmt_t img_fmt)
static switch_image_t *png2img(png_image *png, switch_img_fmt_t img_fmt)
{
png_image png = { 0 };
png_bytep buffer = NULL;
switch_image_t *img = NULL;
png.version = PNG_IMAGE_VERSION;
if (!png_image_begin_read_from_file(&png, file_name)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error open png: %s\n", file_name);
goto err;
}
png->version = PNG_IMAGE_VERSION;
if (img_fmt == SWITCH_IMG_FMT_I420) {
png.format = PNG_FORMAT_RGB;
png->format = PNG_FORMAT_RGB;
} else if (img_fmt == SWITCH_IMG_FMT_ARGB) {
#if SWITCH_BYTE_ORDER == __BIG_ENDIAN
png.format = PNG_FORMAT_ARGB;
png->format = PNG_FORMAT_ARGB;
#else
png.format = PNG_FORMAT_BGRA;
png->format = PNG_FORMAT_BGRA;
#endif
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Unsupported image format: %x\n", img_fmt);
goto err;
}
buffer = malloc(PNG_IMAGE_SIZE(png));
buffer = malloc(PNG_IMAGE_SIZE(*png));
switch_assert(buffer);
if (!png_image_finish_read(&png, NULL/*background*/, buffer, 0, NULL)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error read png: %s\n", file_name);
if (!png_image_finish_read(png, NULL/*background*/, buffer, 0, NULL)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error read png\n");
goto err;
}
if (png.width > SWITCH_IMG_MAX_WIDTH || png.height > SWITCH_IMG_MAX_HEIGHT) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "PNG is too large! %dx%d\n", png.width, png.height);
if (png->width > SWITCH_IMG_MAX_WIDTH || png->height > SWITCH_IMG_MAX_HEIGHT) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "PNG is too large! %dx%d\n", png->width, png->height);
goto err;
}
img = switch_img_alloc(NULL, img_fmt, png.width, png.height, 1);
img = switch_img_alloc(NULL, img_fmt, png->width, png->height, 1);
switch_assert(img);
if (img_fmt == SWITCH_IMG_FMT_I420) {
RAWToI420(buffer, png.width * 3,
RAWToI420(buffer, png->width * 3,
img->planes[SWITCH_PLANE_Y], img->stride[SWITCH_PLANE_Y],
img->planes[SWITCH_PLANE_U], img->stride[SWITCH_PLANE_U],
img->planes[SWITCH_PLANE_V], img->stride[SWITCH_PLANE_V],
png.width, png.height);
png->width, png->height);
} else if (img_fmt == SWITCH_IMG_FMT_ARGB){
ARGBCopy(buffer, png.width * 4,
img->planes[SWITCH_PLANE_PACKED], png.width * 4,
png.width, png.height);
ARGBCopy(buffer, png->width * 4,
img->planes[SWITCH_PLANE_PACKED], png->width * 4,
png->width, png->height);
}
err:
png_image_free(&png);
png_image_free(png);
switch_safe_free(buffer);
return img;
}
SWITCH_DECLARE(switch_image_t *) switch_img_read_png(const char* file_name, switch_img_fmt_t img_fmt)
{
png_image png = { 0 };
png.version = PNG_IMAGE_VERSION;
if (!png_image_begin_read_from_file(&png, file_name)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error open png: %s\n", file_name);
return NULL;
}
return png2img(&png, img_fmt);
}
SWITCH_DECLARE(switch_image_t *) switch_img_read_png_from_memory(void *mem, size_t size, switch_img_fmt_t img_fmt)
{
png_image png = { 0 };
png.version = PNG_IMAGE_VERSION;
if (!png_image_begin_read_from_memory(&png, mem, size)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error open png from memory\n");
return NULL;
}
return png2img(&png, img_fmt);
}
#else /* libpng < 1.6.0 */
// ref: most are out-dated, man libpng :)
@ -2734,6 +2756,11 @@ end:
return img;
}
SWITCH_DECLARE(switch_image_t *) switch_img_read_png_from_memory(void *mem, size_t size, switch_img_fmt_t img_fmt)
{
return NULL;
}
#endif
static void my_png_write_data(png_structp png_ptr, png_bytep data, png_size_t length)