move prototype camera interface to libretro interface - GL texture only for now

Makefile.emscripten

@@ -39,7 +39,8 @@ OBJ = frontend/frontend_emscripten.o \
 		audio/sinc.o \
 		audio/null.o \
 		performance.o \
-		core_info.o
+		core_info.o \
+		camera/rwebcam.o
 
 HAVE_OPENGL = 1
 HAVE_RGUI = 1
@@ -58,8 +59,8 @@ endif
 libretro = libretro_emscripten.bc
 
 LIBS = -lm
-DEFINES = -DHAVE_SCREENSHOTS -DHAVE_NULLAUDIO -DHAVE_BSV_MOVIE
-LDFLAGS = -L. -s TOTAL_MEMORY=$(MEMORY) -s OUTLINING_LIMIT=50000 --js-library emscripten/library_rwebaudio.js --js-library emscripten/library_rwebinput.js --no-heap-copy
+DEFINES = -DHAVE_SCREENSHOTS -DHAVE_CAMERA -DHAVE_NULLAUDIO -DHAVE_BSV_MOVIE
+LDFLAGS = -L. -s TOTAL_MEMORY=$(MEMORY) -s OUTLINING_LIMIT=50000 --js-library emscripten/library_rwebaudio.js --js-library emscripten/library_rwebinput.js --js-library emscripten/library_rwebcam.js --no-heap-copy
 
 ifeq ($(PERF_TEST), 1)
    DEFINES += -DPERF_TEST

camera/rwebcam.c

@@ -0,0 +1,53 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2013 - Michael Lelli
+ * 
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../driver.h"
+#include "../emscripten/RWebCam.h"
+
+static void *rwebcam_init(const char *device, uint64_t caps, unsigned width, unsigned height)
+{
+   (void)device;
+   return RWebCamInit(caps, width, height);
+}
+
+static void rwebcam_free(void *data)
+{
+   RWebCamFree(data);
+}
+
+static bool rwebcam_start(void *data)
+{
+   return RWebCamStart(data);
+}
+
+static void rwebcam_stop(void *data)
+{
+   RWebCamStop(data);
+}
+
+static bool rwebcam_poll(void *data, retro_camera_frame_raw_framebuffer_t frame_raw_cb,
+      retro_camera_frame_opengl_texture_t frame_gl_cb)
+{
+   return RWebCamPoll(data, frame_raw_cb, frame_gl_cb);
+}
+
+const camera_driver_t camera_rwebcam = {
+   rwebcam_init,
+   rwebcam_free,
+   rwebcam_start,
+   rwebcam_stop,
+   rwebcam_poll,
+   "rwebcam",
+};

config.def.h

@@ -82,6 +82,7 @@ enum
    INPUT_NULL,
 
    CAMERA_V4L2,
+   CAMERA_RWEBCAM,
    CAMERA_NULL,
 };
 
@@ -183,6 +184,8 @@ enum
 
 #if defined(HAVE_V4L2)
 #define CAMERA_DEFAULT_DRIVER CAMERA_V4L2
+#elif defined(EMSCRIPTEN)
+#define CAMERA_DEFAULT_DRIVER CAMERA_RWEBCAM
 #else
 #define CAMERA_DEFAULT_DRIVER CAMERA_NULL
 #endif

driver.c

@@ -183,6 +183,9 @@ static const input_driver_t *input_drivers[] = {
 static const camera_driver_t *camera_drivers[] = {
 #ifdef HAVE_V4L2
    &camera_v4l2,
+#endif
+#ifdef EMSCRIPTEN
+   &camera_rwebcam,
 #endif
    NULL,
 };

driver.h

@@ -612,6 +612,7 @@ extern const input_driver_t input_qnx;
 extern const input_driver_t input_rwebinput;
 extern const input_driver_t input_null;
 extern const camera_driver_t camera_v4l2;
+extern const camera_driver_t camera_rwebcam;
 extern const input_osk_driver_t input_ps3_osk;
 
 #include "driver_funcs.h"

emscripten/RWebCam.h

@@ -0,0 +1,24 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2013 - Michael Lelli
+ * 
+ *  RetroArch is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with RetroArch.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "../driver.h"
+
+void *RWebCamInit(uint64_t caps, unsigned width, unsigned height);
+void RWebCamFree(void *data);
+bool RWebCamStart(void *data);
+void RWebCamStop(void *data);
+bool RWebCamPoll(void *data, retro_camera_frame_raw_framebuffer_t frame_raw_cb, retro_camera_frame_opengl_texture_t frame_gl_cb);

emscripten/library_rwebcam.js

@@ -2,19 +2,20 @@
 
 var LibraryRWebCam = {
    $RWC: {
-      /*
-      run modes:
-      0: not running
-      1: waiting for user to confirm webcam
-      2: running
-      */
-      runMode: 0,
-      videoElement: null
+      RETRO_CAMERA_BUFFER_OPENGL_TEXTURE: 0,
+      RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER: 1,
+      tmp: null,
+
+      contexts: [],
+      counter: 0,
+
+      ready: function(data) {
+         return RWC.contexts[data].runMode == 2 && !RWC.contexts[data].videoElement.paused && RWC.contexts[data].videoElement.videoWidth != 0 && RWC.contexts[data].videoElement.videoHeight != 0;
+      }
    },
 
-   RWebCamInit: function() {
-      RWC.runMode = 0;
-
+   RWebCamInit__deps: ['malloc'],
+   RWebCamInit: function(caps1, caps2, width, height) {
       if (!navigator) return 0;
 
       navigator.getMedia = navigator.getUserMedia ||
@@ -24,47 +25,93 @@ var LibraryRWebCam = {
 
       if (!navigator.getMedia) return 0;
 
-      RWC.videoElement = document.createElement("video");
+      var c = ++RWC.counter;
 
-      RWC.runMode = 1;
+      RWC.contexts[c] = [];
+      RWC.contexts[c].videoElement = document.createElement("video");
+      if (width !== 0 && height !== 0) {
+         RWC.contexts[c].videoElement.width = width;
+         RWC.contexts[c].videoElement.height = height;
+      }
+      RWC.contexts[c].runMode = 1;
+      RWC.contexts[c].glTex = caps1 & (1 << RWC.RETRO_CAMERA_BUFFER_OPENGL_TEXTURE);
+      RWC.contexts[c].rawFb = caps1 & (1 << RWC.RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER);
 
       navigator.getMedia({video: true, audio: false}, function(stream) {
-         RWC.videoElement.autoplay = true;
-         RWC.videoElement.src = URL.createObjectURL(stream);
-         RWC.runMode = 2;
+         RWC.contexts[c].videoElement.autoplay = true;
+         RWC.contexts[c].videoElement.src = URL.createObjectURL(stream);
+         RWC.contexts[c].runMode = 2;
       }, function (err) {
          console.log("webcam request failed", err);
          RWC.runMode = 0;
       });
 
-      return 1;
+      // for getting/storing texture id in GL mode
+      if (!RWC.tmp) RWC.tmp = _malloc(4);
+      return c;
    },
 
-   RWebCamTexImage2D__deps: ['RWebCamReady'],
-   RWebCamTexImage2D: function(width, height) {
-      if (!_RWebCamReady()) return 0;
-
-      Module.ctx.texImage2D(Module.ctx.TEXTURE_2D, 0, Module.ctx.RGB, Module.ctx.RGB, Module.ctx.UNSIGNED_BYTE, RWC.videoElement);
-
-      if (width)  {{{ makeSetValue('width',  '0', 'RWC.videoElement.videoWidth',  'i32') }}};
-      if (height) {{{ makeSetValue('height', '0', 'RWC.videoElement.videoHeight', 'i32') }}};
+   RWebCamFree: function(data) {
+      RWC.contexts[data].videoElement.pause();
+      URL.revokeObjectURL(RWC.contexts[data].videoElement.src);
+      RWC.contexts[data].videoElement = null;
+      RWC.contexts[data] = null;
    },
 
-   RWebCamTexSubImage2D__deps: ['RWebCamReady'],
-   RWebCamTexSubImage2D: function(x, y) {
-      if (!_RWebCamReady()) return 0;
+   RWebCamStart__deps: ['glGenTextures', 'glBindTexture', 'glGetIntegerv', 'glTexParameteri'],
+   RWebCamStart: function(data) {
+      var ret = 0;
+      if (RWC.contexts[data].glTex) {
+         _glGenTextures(1, RWC.tmp);
+         RWC.contexts[data].glTexId = {{{ makeGetValue('RWC.tmp', '0', 'i32') }}};
+         if (RWC.contexts[data].glTexId !== 0) {
+            // save previous texture
+            _glGetIntegerv(0x8069 /* GL_TEXTURE_BINDING_2D */, RWC.tmp);
+            var prev = {{{ makeGetValue('RWC.tmp', '0', 'i32') }}};
+            _glBindTexture(0x0DE1 /* GL_TEXTURE_2D */, RWC.contexts[data].glTexId);
+            /* NPOT textures in WebGL must have these filters and clamping settings */
+            _glTexParameteri(0x0DE1 /* GL_TEXTURE_2D */, 0x2800 /* GL_TEXTURE_MAG_FILTER */, 0x2601 /* GL_LINEAR */);
+            _glTexParameteri(0x0DE1 /* GL_TEXTURE_2D */, 0x2801 /* GL_TEXTURE_MIN_FILTER */, 0x2601 /* GL_LINEAR */);
+            _glTexParameteri(0x0DE1 /* GL_TEXTURE_2D */, 0x2802 /* GL_TEXTURE_WRAP_S */, 0x812F /* GL_CLAMP_TO_EDGE */);
+            _glTexParameteri(0x0DE1 /* GL_TEXTURE_2D */, 0x2803 /*GL_TEXTURE_WRAP_T */, 0x812F /* GL_CLAMP_TO_EDGE */);
+            _glBindTexture(0x0DE1 /* GL_TEXTURE_2D */, prev);
+            RWC.contexts[data].glFirstFrame = true;
+            ret = 1;
+         }
+      }
 
-      Module.ctx.texSubImage2D(Module.ctx.TEXTURE_2D, 0, x, y, Module.ctx.RGB, Module.ctx.UNSIGNED_BYTE, RWC.videoElement);
+      return ret;
    },
 
-   RWebCamReady: function() {
-      return (RWC.runMode == 2 && !RWC.videoElement.paused && RWC.videoElement.videoWidth != 0 && RWC.videoElement.videoHeight != 0) ? 1 : 0;
+   RWebCamStop__deps: ['glDeleteTextures'],
+   RWebCamStop: function(data) {
+      if (RWC.contexts[data].glTexId) {
+         _glDeleteTextures(1, RWC.contexts[data].glTexId);
+      }
    },
 
-   RWebCamFree: function() {
-      RWC.videoElement.pause();
-      RWC.videoElement = null;
-      RWC.runMode = 0;
+   RWebCamPoll__deps: ['glBindTexture', 'glGetIntegerv'],
+   RWebCamPoll: function(data, frame_raw_cb, frame_gl_cb) {
+      if (!RWC.ready(data)) return 0;
+      var ret = 0;
+
+      if (RWC.contexts[data].glTexId !== 0 && frame_gl_cb !== 0) {         
+         _glGetIntegerv(0x8069 /* GL_TEXTURE_BINDING_2D */, RWC.tmp);
+         var prev = {{{ makeGetValue('RWC.tmp', '0', 'i32') }}};
+         _glBindTexture(0x0DE1 /* GL_TEXTURE_2D */, RWC.contexts[data].glTexId);
+         if (RWC.contexts[data].glFirstFrame) {
+            Module.ctx.texImage2D(Module.ctx.TEXTURE_2D, 0, Module.ctx.RGB, Module.ctx.RGB, Module.ctx.UNSIGNED_BYTE, RWC.contexts[data].videoElement);
+            RWC.contexts[data].glFirstFrame = false;
+         } else {
+            Module.ctx.texSubImage2D(Module.ctx.TEXTURE_2D, 0, 0, 0, Module.ctx.RGB, Module.ctx.UNSIGNED_BYTE, RWC.contexts[data].videoElement);
+         }
+         _glBindTexture(0x0DE1 /* GL_TEXTURE_2D */, prev);
+         Runtime.dynCall('viii', frame_gl_cb, [RWC.contexts[data].glTexId, 0x0DE1 /* GL_TEXTURE_2D */, 0]);
+
+         ret = 1;
+      }
+
+      return ret;
    }
 };
 

frontend/frontend_emscripten.c

@@ -21,8 +21,8 @@
 #include "../file.h"
 #include "../emscripten/RWebAudio.h"
 
-#ifdef HAVE_RGUI
-#include "../frontend/menu/rgui.h"
+#ifdef HAVE_MENU
+#include "../frontend/menu/menu_common.h"
 #endif
 
 static bool menuloop;

settings.c

@@ -155,6 +155,8 @@ const char *config_get_default_camera(void)
    {
       case CAMERA_V4L2:
          return "video4linux2";
+      case CAMERA_RWEBCAM:
+         return "rwebcam";
       case CAMERA_NULL:
          return "null";
       default: