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/*
* libjingle
* Copyright 2004 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Implementation of GtkVideoRenderer
#include "talk/media/devices/gtkvideorenderer.h"
#include <gdk/gdk.h>
#include <glib.h>
#include <gtk/gtk.h>
#include "talk/media/base/videocommon.h"
#include "talk/media/base/videoframe.h"
namespace cricket {
class ScopedGdkLock {
public:
ScopedGdkLock() {
gdk_threads_enter();
}
~ScopedGdkLock() {
gdk_threads_leave();
}
};
GtkVideoRenderer::GtkVideoRenderer(int x, int y)
: window_(NULL),
draw_area_(NULL),
initial_x_(x),
initial_y_(y),
width_(0),
height_(0) {
g_type_init();
// g_thread_init API is deprecated since glib 2.31.0, see release note:
// http://mail.gnome.org/archives/gnome-announce-list/2011-October/msg00041.html
#if !GLIB_CHECK_VERSION(2, 31, 0)
g_thread_init(NULL);
#endif
gdk_threads_init();
}
GtkVideoRenderer::~GtkVideoRenderer() {
if (window_) {
ScopedGdkLock lock;
gtk_widget_destroy(window_);
// Run the Gtk main loop to tear down the window.
Pump();
}
// Don't need to destroy draw_area_ because it is not top-level, so it is
// implicitly destroyed by the above.
}
bool GtkVideoRenderer::SetSize(int width, int height, int reserved) {
ScopedGdkLock lock;
// If the dimension is the same, no-op.
if (width_ == width && height_ == height) {
return true;
}
// For the first frame, initialize the GTK window
if ((!window_ && !Initialize(width, height)) || IsClosed()) {
return false;
}
image_.reset(new uint8_t[width * height * 4]);
gtk_widget_set_size_request(draw_area_, width, height);
width_ = width;
height_ = height;
return true;
}
bool GtkVideoRenderer::RenderFrame(const VideoFrame* video_frame) {
if (!video_frame) {
return false;
}
const VideoFrame* frame = video_frame->GetCopyWithRotationApplied();
// Need to set size as the frame might be rotated.
if (!SetSize(frame->GetWidth(), frame->GetHeight(), 0)) {
return false;
}
// convert I420 frame to ABGR format, which is accepted by GTK
frame->ConvertToRgbBuffer(cricket::FOURCC_ABGR,
image_.get(),
frame->GetWidth() * frame->GetHeight() * 4,
frame->GetWidth() * 4);
ScopedGdkLock lock;
if (IsClosed()) {
return false;
}
// draw the ABGR image
gdk_draw_rgb_32_image(draw_area_->window,
draw_area_->style->fg_gc[GTK_STATE_NORMAL],
0,
0,
frame->GetWidth(),
frame->GetHeight(),
GDK_RGB_DITHER_MAX,
image_.get(),
frame->GetWidth() * 4);
// Run the Gtk main loop to refresh the window.
Pump();
return true;
}
bool GtkVideoRenderer::Initialize(int width, int height) {
gtk_init(NULL, NULL);
window_ = gtk_window_new(GTK_WINDOW_TOPLEVEL);
draw_area_ = gtk_drawing_area_new();
if (!window_ || !draw_area_) {
return false;
}
gtk_window_set_position(GTK_WINDOW(window_), GTK_WIN_POS_CENTER);
gtk_window_set_title(GTK_WINDOW(window_), "Video Renderer");
gtk_window_set_resizable(GTK_WINDOW(window_), FALSE);
gtk_widget_set_size_request(draw_area_, width, height);
gtk_container_add(GTK_CONTAINER(window_), draw_area_);
gtk_widget_show_all(window_);
gtk_window_move(GTK_WINDOW(window_), initial_x_, initial_y_);
image_.reset(new uint8_t[width * height * 4]);
return true;
}
void GtkVideoRenderer::Pump() {
while (gtk_events_pending()) {
gtk_main_iteration();
}
}
bool GtkVideoRenderer::IsClosed() const {
if (!window_) {
// Not initialized yet, so hasn't been closed.
return false;
}
if (!GTK_IS_WINDOW(window_) || !GTK_IS_DRAWING_AREA(draw_area_)) {
return true;
}
return false;
}
} // namespace cricket
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