Decoder for webp

codecs/webp_dec/webp_dec.c

@@ -0,0 +1,51 @@
+#include "emscripten.h"
+#include "src/webp/decode.h"
+#include "src/webp/demux.h"
+#include <stdlib.h>
+
+EMSCRIPTEN_KEEPALIVE
+int version() {
+  return WebPGetDecoderVersion();
+}
+
+EMSCRIPTEN_KEEPALIVE
+uint8_t* create_buffer(int size) {
+  return malloc(size);
+}
+
+EMSCRIPTEN_KEEPALIVE
+void destroy_buffer(uint8_t* p) {
+  free(p);
+}
+
+int result[3];
+EMSCRIPTEN_KEEPALIVE
+void decode(uint8_t* img_in, int size) {
+  int width, height;
+  uint8_t* img_out = WebPDecodeRGBA(img_in, size, &width, &height);
+  result[0] = (int)img_out;
+  result[1] = width;
+  result[2] = height;
+
+}
+
+EMSCRIPTEN_KEEPALIVE
+void free_result() {
+  WebPFree(result[0]);
+}
+
+EMSCRIPTEN_KEEPALIVE
+int get_result_pointer() {
+  return result[0];
+}
+
+EMSCRIPTEN_KEEPALIVE
+int get_result_width() {
+  return result[1];
+}
+
+EMSCRIPTEN_KEEPALIVE
+int get_result_height() {
+  return result[2];
+}
+