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// Copyright 2017 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "starboard/android/shared/video_window.h"
#include <EGL/egl.h>
#include <GLES2/gl2.h>
#include <android/native_window.h>
#include <android/native_window_jni.h>
#include <jni.h>
#include "starboard/android/shared/jni_env_ext.h"
#include "starboard/common/log.h"
#include "starboard/common/mutex.h"
#include "starboard/configuration.h"
#include "starboard/once.h"
#include "starboard/shared/gles/gl_call.h"
namespace starboard {
namespace android {
namespace shared {
namespace {
// Global video surface pointer mutex.
SB_ONCE_INITIALIZE_FUNCTION(Mutex, GetViewSurfaceMutex);
// Global pointer to the single video surface.
jobject g_j_video_surface = NULL;
// Global pointer to the single video window.
ANativeWindow* g_native_video_window = NULL;
// Global video surface pointer holder.
VideoSurfaceHolder* g_video_surface_holder = NULL;
// Global boolean to indicate if we need to reset SurfaceView after playing
// vertical video.
bool g_reset_surface_on_clear_window = false;
void ClearNativeWindow(ANativeWindow* native_window) {
EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
eglInitialize(display, NULL, NULL);
if (display == EGL_NO_DISPLAY) {
SB_DLOG(ERROR) << "Found no EGL display in ClearVideoWindow";
return;
}
const EGLint kAttributeList[] = {
EGL_RED_SIZE,
8,
EGL_GREEN_SIZE,
8,
EGL_BLUE_SIZE,
8,
EGL_ALPHA_SIZE,
8,
EGL_RENDERABLE_TYPE,
EGL_OPENGL_ES2_BIT,
EGL_NONE,
0,
EGL_NONE,
};
// First, query how many configs match the given attribute list.
EGLint num_configs = 0;
EGL_CALL(eglChooseConfig(display, kAttributeList, NULL, 0, &num_configs));
SB_DCHECK(num_configs != 0);
// Allocate space to receive the matching configs and retrieve them.
EGLConfig* configs = new EGLConfig[num_configs];
EGL_CALL(eglChooseConfig(display, kAttributeList, configs, num_configs,
&num_configs));
EGLNativeWindowType egl_native_window =
static_cast<EGLNativeWindowType>(native_window);
EGLConfig config;
// Find the first config that successfully allow a window surface to be
// created.
EGLSurface surface;
for (int config_number = 0; config_number < num_configs; ++config_number) {
config = configs[config_number];
surface = eglCreateWindowSurface(display, config, egl_native_window, NULL);
if (eglGetError() == EGL_SUCCESS)
break;
}
if (surface == EGL_NO_SURFACE) {
SB_DLOG(ERROR) << "Found no EGL surface in ClearVideoWindow";
return;
}
SB_DCHECK(surface != EGL_NO_SURFACE);
delete[] configs;
// Create an OpenGL ES 2.0 context.
EGLContext context = EGL_NO_CONTEXT;
EGLint context_attrib_list[] = {
EGL_CONTEXT_CLIENT_VERSION,
2,
EGL_NONE,
};
context =
eglCreateContext(display, config, EGL_NO_CONTEXT, context_attrib_list);
SB_DCHECK(eglGetError() == EGL_SUCCESS);
SB_DCHECK(context != EGL_NO_CONTEXT);
/* connect the context to the surface */
EGL_CALL(eglMakeCurrent(display, surface, surface, context));
GL_CALL(glClearColor(0, 0, 0, 1));
GL_CALL(glClear(GL_COLOR_BUFFER_BIT));
GL_CALL(glFlush());
EGL_CALL(eglSwapBuffers(display, surface));
// Cleanup all used resources.
EGL_CALL(
eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT));
EGL_CALL(eglDestroyContext(display, context));
EGL_CALL(eglDestroySurface(display, surface));
EGL_CALL(eglTerminate(display));
}
} // namespace
extern "C" SB_EXPORT_PLATFORM void
Java_dev_cobalt_media_VideoSurfaceView_nativeOnVideoSurfaceChanged(
JNIEnv* env,
jobject unused_this,
jobject surface) {
ScopedLock lock(*GetViewSurfaceMutex());
if (g_video_surface_holder) {
g_video_surface_holder->OnSurfaceDestroyed();
g_video_surface_holder = NULL;
}
if (g_j_video_surface) {
env->DeleteGlobalRef(g_j_video_surface);
g_j_video_surface = NULL;
}
if (g_native_video_window) {
ANativeWindow_release(g_native_video_window);
g_native_video_window = NULL;
}
if (surface) {
g_j_video_surface = env->NewGlobalRef(surface);
g_native_video_window = ANativeWindow_fromSurface(env, surface);
ClearNativeWindow(g_native_video_window);
}
}
extern "C" SB_EXPORT_PLATFORM void
Java_dev_cobalt_media_VideoSurfaceView_nativeSetNeedResetSurface(
JNIEnv* env,
jobject unused_this) {
g_reset_surface_on_clear_window = true;
}
// static
bool VideoSurfaceHolder::IsVideoSurfaceAvailable() {
// We only consider video surface is available when there is a video
// surface and it is not held by any decoder, i.e.
// g_video_surface_holder is NULL.
ScopedLock lock(*GetViewSurfaceMutex());
return !g_video_surface_holder && g_j_video_surface;
}
jobject VideoSurfaceHolder::AcquireVideoSurface() {
ScopedLock lock(*GetViewSurfaceMutex());
if (g_video_surface_holder != NULL) {
return NULL;
}
if (!g_j_video_surface) {
return NULL;
}
g_video_surface_holder = this;
return g_j_video_surface;
}
void VideoSurfaceHolder::ReleaseVideoSurface() {
ScopedLock lock(*GetViewSurfaceMutex());
if (g_video_surface_holder == this) {
g_video_surface_holder = NULL;
}
}
bool VideoSurfaceHolder::GetVideoWindowSize(int* width, int* height) {
ScopedLock lock(*GetViewSurfaceMutex());
if (g_native_video_window == NULL) {
return false;
} else {
*width = ANativeWindow_getWidth(g_native_video_window);
*height = ANativeWindow_getHeight(g_native_video_window);
return true;
}
}
void VideoSurfaceHolder::ClearVideoWindow(bool force_reset_surface) {
// Lock *GetViewSurfaceMutex() here, to avoid releasing g_native_video_window
// during painting.
ScopedLock lock(*GetViewSurfaceMutex());
if (!g_native_video_window) {
SB_LOG(INFO) << "Tried to clear video window when it was null.";
return;
}
JniEnvExt* env = JniEnvExt::Get();
if (!env) {
SB_LOG(INFO) << "Tried to clear video window when JniEnvExt was null.";
return;
}
if (force_reset_surface) {
env->CallStarboardVoidMethodOrAbort("resetVideoSurface", "()V");
return;
} else if (g_reset_surface_on_clear_window) {
int width = ANativeWindow_getWidth(g_native_video_window);
int height = ANativeWindow_getHeight(g_native_video_window);
if (width <= height) {
env->CallStarboardVoidMethodOrAbort("resetVideoSurface", "()V");
return;
}
}
ClearNativeWindow(g_native_video_window);
}
} // namespace shared
} // namespace android
} // namespace starboard