fix video file loading from wasm packaged files (#7630)

#changelog #emscripten

Author: ofTheo

addons/ofxEmscripten/libs/html5video/include/html5video.h

@@ -4,6 +4,7 @@ extern "C"{
     extern int html5video_player_create();
     extern void html5video_player_delete(int id);
     extern void html5video_player_load(int id,const char* src);
+    extern void html5video_player_load_url(int id,const char* src);
     extern const char* html5video_player_pixel_format(int it);
     extern void html5video_player_set_pixel_format(int it, const char* format);
     extern int html5video_player_update(int id, int update_pixels, unsigned char* pixels);

addons/ofxEmscripten/libs/html5video/lib/emscripten/library_html5video.js

@@ -111,7 +111,7 @@ var LibraryHTML5Video = {
     },
 
     html5video_player_load__deps: ['$GL'],
-    html5video_player_load: function(player_id, src) {
+    html5video_player_load_url: function(player_id, src) {
         VIDEO.player[player_id].src = UTF8ToString(src);
         var texId = GL.getNewId(GL.textures);
         var texture = GLctx.createTexture();
@@ -125,6 +125,40 @@ var LibraryHTML5Video = {
         VIDEO.player[player_id].textureId = texId;
     },
 
+    html5video_player_load: function(player_id, src) {
+            
+          try {
+            var filePath = UTF8ToString(src); // The path to your file in MEMFS
+            var data = FS.readFile(filePath, { encoding: 'binary' });
+            var ext = filePath.split('.').pop();
+            
+            var stats = FS.stat(filePath)
+            var fileSizeInBytes = stats.size;
+            
+            const blob = new Blob([data], { type: 'video/' + ext  });
+            const videoSrc = URL.createObjectURL(blob);
+
+            VIDEO.player[player_id].src = videoSrc;
+            var texId = GL.getNewId(GL.textures);
+            var texture = GLctx.createTexture();
+            texture.name = texId;
+            GL.textures[texId] = texture;
+            GLctx.bindTexture(GLctx.TEXTURE_2D, texture);
+            GLctx.texParameteri(GLctx.TEXTURE_2D, GLctx.TEXTURE_MAG_FILTER, GLctx.LINEAR);
+            GLctx.texParameteri(GLctx.TEXTURE_2D, GLctx.TEXTURE_MIN_FILTER, GLctx.LINEAR);
+            GLctx.texParameteri(GLctx.TEXTURE_2D, GLctx.TEXTURE_WRAP_S, GLctx.CLAMP_TO_EDGE);
+            GLctx.texParameteri(GLctx.TEXTURE_2D, GLctx.TEXTURE_WRAP_T, GLctx.CLAMP_TO_EDGE);
+            VIDEO.player[player_id].textureId = texId;
+
+            // Check the file size
+            //console.log('File size:' + fileSizeInBytes);
+            //console.log('data size:' + data.length);
+          } catch (error) {
+            console.error('Error reading file:' + filePath + " " + error);
+          }
+    },
+
+
     html5video_player_pixel_format: function(player_id) {
         var string = VIDEO.player[player_id].pixelFormat;
         var size = lengthBytesUTF8(string) + 1;

addons/ofxEmscripten/src/ofxEmscriptenVideoPlayer.cpp

@@ -29,8 +29,8 @@ ofxEmscriptenVideoPlayer::~ofxEmscriptenVideoPlayer() {
 }
 
 bool ofxEmscriptenVideoPlayer::load(string name){
-	if (name.substr(0, 12) == "blob:http://" || name.substr(0, 13) == "blob:https://"){
-		html5video_player_load(player_id, name.c_str());
+	if (name.substr(0, 7) == "http://" || name.substr(0, 8) == "https://"){
+		html5video_player_load_url(player_id, name.c_str());
 	} else{
 		html5video_player_load(player_id, ofToDataPath(name).c_str());
 	}
@@ -86,7 +86,16 @@ void ofxEmscriptenVideoPlayer::update(){
 			texture.texData.bAllocated = true;
 			texture.setUseExternalTextureID(html5video_player_texture_id(player_id));
 		}
-	}
+	}else{
+            if( !bHadValidFrame && !bWarnBlocked ){
+                if( ofGetElapsedTimef() - timePlayRequested > 3.0 ){
+                    string errorMsg = "ofxEmscriptenVideoPlayer::update video is not playing - check your browser preferences 'Auto Play' and click allow for this site  ";
+                    ofLogError() << errorMsg << endl;
+                    std::cout << errorMsg << endl;
+                    bWarnBlocked = true;
+                }
+            }
+        }
 }
 
 void ofxEmscriptenVideoPlayer::play(){

addons/ofxEmscripten/src/ofxEmscriptenVideoPlayer.h

@@ -67,4 +67,7 @@ class ofxEmscriptenVideoPlayer: public ofBaseVideoPlayer {
 	ofTexture texture;
 	ofPixels pixels;
 	bool usePixels;
+        float timePlayRequested = 0;
+        bool bHadValidFrame = false;
+        bool bWarnBlocked = false; 
 };