(iOS) Skeleton camera driver

apple/RetroArch_iOS.xcodeproj/project.pbxproj

@@ -339,6 +339,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 6.0;
 				ONLY_ACTIVE_ARCH = YES;
 				OTHER_CFLAGS = (
+					"-DHAVE_CAMERA",
 					"-DHAVE_GRIFFIN",
 					"-DHAVE_RGUI",
 					"-DHAVE_MENU",
@@ -389,6 +390,7 @@
 				OTHER_CFLAGS = (
 					"-DNS_BLOCK_ASSERTIONS=1",
 					"-DNDEBUG",
+					"-DHAVE_CAMERA",
 					"-DHAVE_GRIFFIN",
 					"-DHAVE_RGUI",
 					"-DHAVE_MENU",
@@ -433,6 +435,7 @@
 				LIBRARY_SEARCH_PATHS = "";
 				OTHER_CFLAGS = (
 					"-DHAVE_RARCH_MAIN_WRAP",
+					"-DHAVE_CAMERA",
 					"-DHAVE_GRIFFIN",
 					"-DHAVE_RGUI",
 					"-DHAVE_MENU",
@@ -476,6 +479,7 @@
 					"-DNS_BLOCK_ASSERTIONS=1",
 					"-DNDEBUG",
 					"-DHAVE_RARCH_MAIN_WRAP",
+					"-DHAVE_CAMERA",
 					"-DHAVE_GRIFFIN",
 					"-DHAVE_RGUI",
 					"-DHAVE_MENU",

camera/ios.c

@@ -0,0 +1,110 @@
+/*  RetroArch - A frontend for libretro.
+ *  Copyright (C) 2010-2013 - Hans-Kristian Arntzen
+ *  Copyright (C) 2011-2013 - Daniel De Matteis
+ * 
+ *  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 <OpenGLES/ES2/gl.h>
+#include <OpenGLES/ES2/glext.h>
+#include "../driver.h"
+
+typedef struct ios_camera
+{
+   GLuint tex;
+} ioscamera_t;
+
+static void *ios_camera_init(const char *device, uint64_t caps, unsigned width, unsigned height)
+{
+   if ((caps & (1ULL << RETRO_CAMERA_BUFFER_OPENGL_TEXTURE)) == 0)
+   {
+      RARCH_ERR("ioscamera returns OpenGL texture.\n");
+      return NULL;
+   }
+
+   ioscamera_t *ioscamera = (ioscamera_t*)calloc(1, sizeof(ioscamera_t));
+   if (!ioscamera)
+      return NULL;
+
+   return ioscamera;
+dealloc:
+   free(ioscamera);
+   return NULL;
+}
+
+static void ios_camera_free(void *data)
+{
+   ioscamera_t *ioscamera = (ioscamera_t*)data;
+
+   if (ioscamera)
+      free(ioscamera);
+   ioscamera = NULL;
+}
+
+static bool ios_camera_start(void *data)
+{
+   ioscamera_t *ioscamera = (ioscamera_t*)data;
+
+   glGenTextures(1, &ioscamera->tex);
+   glBindTexture(GL_TEXTURE_2D, ioscamera->tex);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+   return true;
+}
+
+static void ios_camera_stop(void *data)
+{
+   ioscamera_t *ioscamera = (ioscamera_t*)data;
+   
+   if (ioscamera->tex)
+      glDeleteTextures(1, &ioscamera->tex);
+}
+
+static bool ios_camera_poll(void *data, retro_camera_frame_raw_framebuffer_t frame_raw_cb,
+      retro_camera_frame_opengl_texture_t frame_gl_cb)
+{
+   ioscamera_t *ioscamera = (ioscamera_t*)data;
+
+   bool newFrame = false;
+   (void)frame_raw_cb;
+   (void)newFrame;
+
+   if (newFrame)
+   {
+      // FIXME: Identity for now. Use proper texture matrix as returned by iOS Camera (if at all?).
+      static const float affine[] = {
+         1.0f, 0.0f, 0.0f,
+         0.0f, 1.0f, 0.0f,
+         0.0f, 0.0f, 1.0f
+      };
+
+      if (frame_gl_cb)
+        frame_gl_cb(ioscamera->tex,
+              GL_TEXTURE_2D,
+              affine);
+      return true;
+   }
+
+   return false;
+}
+
+const camera_driver_t camera_ios = {
+   ios_camera_init,
+   ios_camera_free,
+   ios_camera_start,
+   ios_camera_stop,
+   ios_camera_poll,
+   "ios",
+};

config.def.h

@@ -84,6 +84,7 @@ enum
    CAMERA_V4L2,
    CAMERA_RWEBCAM,
    CAMERA_ANDROID,
+   CAMERA_IOS,
    CAMERA_NULL,
 
    OSK_PS3,
@@ -192,6 +193,8 @@ enum
 #define CAMERA_DEFAULT_DRIVER CAMERA_RWEBCAM
 #elif defined(ANDROID)
 #define CAMERA_DEFAULT_DRIVER CAMERA_ANDROID
+#elif defined(IOS)
+#define CAMERA_DEFAULT_DRIVER CAMERA_IOS
 #else
 #define CAMERA_DEFAULT_DRIVER CAMERA_NULL
 #endif

driver.c

@@ -242,6 +242,9 @@ static const camera_driver_t *camera_drivers[] = {
 #endif
 #ifdef ANDROID
    &camera_android,
+#endif
+#ifdef IOS
+   &camera_ios,
 #endif
    NULL,
 };

driver.h

@@ -620,6 +620,7 @@ extern const input_driver_t input_null;
 extern const camera_driver_t camera_v4l2;
 extern const camera_driver_t camera_android;
 extern const camera_driver_t camera_rwebcam;
+extern const camera_driver_t camera_ios;
 extern const input_osk_driver_t input_ps3_osk;
 
 #include "driver_funcs.h"

griffin/griffin.c

@@ -358,6 +358,8 @@ CAMERA
 #ifdef HAVE_CAMERA
 #if defined(ANDROID)
 #include "../camera/android.c"
+#elif defined(IOS)
+#include "../camera/ios.c"
 #elif defined(EMSCRIPTEN)
 #include "../camera/rwebcam.c"
 #endif

settings.c

@@ -176,6 +176,8 @@ const char *config_get_default_camera(void)
          return "null";
       case CAMERA_ANDROID:
          return "android";
+      case CAMERA_IOS:
+         return "ios";
       default:
          return NULL;
    }