[vlc-devel] [PATCH 2/3] Vout: add a new window provider to create android native windows.

[Adrien Maglo]

---
 modules/video_output/Modules.am            |  10 ++
 modules/video_output/androidnativewindow.c | 188 +++++++++++++++++++++++++++++
 2 files changed, 198 insertions(+)
 create mode 100644 modules/video_output/androidnativewindow.c

diff --git a/modules/video_output/Modules.am b/modules/video_output/Modules.am
index 041dc29..3393a11 100644
--- a/modules/video_output/Modules.am
+++ b/modules/video_output/Modules.am
@@ -180,6 +180,16 @@ if HAVE_KVA
 vout_LTLIBRARIES += libkva_plugin.la
 endif
 
+### Android ###
+
+libandroid_native_window_plugin_la_SOURCES = androidnativewindow.c
+libandroid_native_window_plugin_la_CFLAGS = $(AM_CFLAGS)
+libandroid_native_window_plugin_la_LIBADD = -ldl
+
+if HAVE_ANDROID
+vout_LTLIBRARIES += libandroid_native_window_plugin.la
+endif
+
 ### Coloured ASCII art ###
 libcaca_plugin_la_SOURCES = caca.c
 libcaca_plugin_la_CFLAGS = $(AM_CFLAGS) $(CACA_CFLAGS)
diff --git a/modules/video_output/androidnativewindow.c b/modules/video_output/androidnativewindow.c
new file mode 100644
index 0000000..8482fba
--- /dev/null
+++ b/modules/video_output/androidnativewindow.c
@@ -0,0 +1,188 @@
+/**
+ * @file androidnativewindow.c
+ * @brief Android native window provider module for VLC media player
+ */
+/*****************************************************************************
+ * Copyright © 2013 VLC authors and VideoLAN
+ *
+ * Author: Adrien Maglo <magsoft at videolan.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdarg.h>
+#include <assert.h>
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_vout_window.h>
+
+#include <dlfcn.h>
+#include <android/native_window.h>
+#include <jni.h>
+#include <android/native_window_jni.h>
+
+#include <android/log.h>
+# define LOGV(...)  __android_log_print(ANDROID_LOG_VERBOSE,"VLC_OPENGL",__VA_ARGS__)
+
+
+typedef ANativeWindow* (*ptr_ANativeWindow_fromSurface)(JNIEnv*, jobject);
+typedef void (*ptr_ANativeWindow_release)(ANativeWindow*);
+
+extern JavaVM *myVm;
+extern jobject jni_LockAndGetAndroidJavaSurface();
+extern void jni_UnlockAndroidSurface();
+extern void  jni_SetAndroidSurfaceSize(int width, int height, int visible_width, int visible_height, int sar_num, int sar_den);
+
+static int Open(vout_window_t *, const vout_window_cfg_t *);
+static void Close(vout_window_t *);
+static int Control(vout_window_t *, int, va_list ap);
+
+/*
+ * Module descriptor
+ */
+vlc_module_begin()
+    set_shortname(N_("ANativeWindow"))
+    set_description(N_("Android native window"))
+    set_category(CAT_VIDEO)
+    set_subcategory(SUBCAT_VIDEO_VOUT)
+    set_capability("vout window anativewindow", 10)
+    set_callbacks(Open, Close)
+vlc_module_end()
+
+
+struct vout_window_sys_t
+{
+    void *p_library;
+
+    ptr_ANativeWindow_fromSurface s_winFromSurface;
+    ptr_ANativeWindow_release s_winRelease;
+
+    ANativeWindow *window;
+};
+
+
+/**
+ * Dynamically load the libandroid library and the needed symbols.
+ */
+static void *InitLibrary(vout_window_sys_t *p_sys)
+{
+    void *p_library = dlopen("libandroid.so", RTLD_NOW);
+    if (!p_library)
+        return NULL;
+
+    p_sys->s_winFromSurface =
+        (ptr_ANativeWindow_fromSurface)(dlsym(p_library, "ANativeWindow_fromSurface"));
+    p_sys->s_winRelease =
+        (ptr_ANativeWindow_release)(dlsym(p_library, "ANativeWindow_release"));
+
+    if (p_sys->s_winFromSurface == NULL || p_sys->s_winRelease == NULL)
+    {
+        dlclose(p_sys->p_library);
+        return NULL;
+    }
+
+    return p_library;
+}
+
+
+/**
+ * Create an Android native window.
+ */
+static int Open(vout_window_t *wnd, const vout_window_cfg_t *cfg)
+{
+    vout_window_sys_t *p_sys = malloc(sizeof (*p_sys));
+    if (p_sys == NULL)
+        return VLC_ENOMEM;
+
+    p_sys->p_library = InitLibrary(p_sys);
+    if (p_sys->p_library == NULL)
+    {
+        free(p_sys);
+        return VLC_EGENERIC;
+    }
+
+    // Create the native window by first getting the Java surface.
+    jobject javaSurface = jni_LockAndGetAndroidJavaSurface();
+    if (javaSurface == NULL)
+        goto error;
+
+    JNIEnv *p_env;
+    (*myVm)->AttachCurrentThread(myVm, &p_env, NULL);
+    p_sys->window = p_sys->s_winFromSurface(p_env, javaSurface); // ANativeWindow_fromSurface call.
+    (*myVm)->DetachCurrentThread(myVm);
+
+    jni_UnlockAndroidSurface();
+
+    if (p_sys->window == NULL)
+        goto error;
+
+    wnd->handle.anativewindow = p_sys->window;
+    wnd->control = Control;
+    wnd->sys = p_sys;
+
+    /* Set the Java surface size.
+     * TODO: get the visible size and sar from vout_window_cfg_t
+     * by adding new members to this structure? */
+    jni_SetAndroidSurfaceSize(cfg->width, cfg->height, cfg->width, cfg->height, 1, 1);
+
+    return VLC_SUCCESS;
+
+error:
+    dlclose(p_sys->p_library);
+    free(p_sys);
+    return VLC_EGENERIC;
+}
+
+
+/**
+ * Destroys the Android native window.
+ */
+static void Close(vout_window_t *wnd)
+{
+    vout_window_sys_t *p_sys = wnd->sys;
+    p_sys->s_winRelease(p_sys->window); // Release the native window.
+    dlclose(p_sys->p_library); // Close the library.
+    free (p_sys);
+}
+
+
+/**
+ * Window control.
+ */
+static int Control(vout_window_t *wnd, int cmd, va_list ap)
+{
+    switch (cmd)
+    {
+        case VOUT_WINDOW_SET_SIZE:
+        {
+            unsigned width = va_arg(ap, unsigned);
+            unsigned height = va_arg(ap, unsigned);
+            jni_SetAndroidSurfaceSize(width, height, width, height, 1, 1);
+            break;
+        }
+        case VOUT_WINDOW_SET_STATE:
+        case VOUT_WINDOW_SET_FULLSCREEN:
+            return VLC_EGENERIC;
+        default:
+            msg_Err (wnd, "request %d not implemented", cmd);
+            return VLC_EGENERIC;
+    }
+    return VLC_SUCCESS;
+}
-- 
1.8.1.2