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      1 /*
      2  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #ifndef WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_LINUX_VIDEO_X11_CHANNEL_H_
     12 #define WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_LINUX_VIDEO_X11_CHANNEL_H_
     13 
     14 #include <sys/shm.h>
     15 #include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
     16 #include "webrtc/modules/video_render/include/video_render_defines.h"
     17 
     18 #include <X11/Xlib.h>
     19 #include <X11/Xutil.h>
     20 #include <X11/extensions/XShm.h>
     21 
     22 namespace webrtc {
     23 class CriticalSectionWrapper;
     24 
     25 #define DEFAULT_RENDER_FRAME_WIDTH 352
     26 #define DEFAULT_RENDER_FRAME_HEIGHT 288
     27 
     28 
     29 class VideoX11Channel: public VideoRenderCallback
     30 {
     31 public:
     32     VideoX11Channel(int32_t id);
     33 
     34     virtual ~VideoX11Channel();
     35 
     36     virtual int32_t RenderFrame(const uint32_t streamId,
     37                                 I420VideoFrame& videoFrame);
     38 
     39     int32_t FrameSizeChange(int32_t width, int32_t height,
     40                             int32_t numberOfStreams);
     41     int32_t DeliverFrame(const I420VideoFrame& videoFrame);
     42     int32_t GetFrameSize(int32_t& width, int32_t& height);
     43     int32_t Init(Window window, float left, float top, float right,
     44                  float bottom);
     45     int32_t ChangeWindow(Window window);
     46     int32_t
     47             GetStreamProperties(uint32_t& zOrder, float& left,
     48                                 float& top, float& right, float& bottom) const;
     49     int32_t ReleaseWindow();
     50 
     51     bool IsPrepared()
     52     {
     53         return _prepared;
     54     }
     55 
     56 private:
     57 
     58     int32_t
     59             CreateLocalRenderer(int32_t width, int32_t height);
     60     int32_t RemoveRenderer();
     61 
     62     //FIXME a better place for this method? the GetWidthHeight no longer
     63     // supported by common_video.
     64     int GetWidthHeight(VideoType type, int bufferSize, int& width,
     65                        int& height);
     66 
     67     CriticalSectionWrapper& _crit;
     68 
     69     Display* _display;
     70     XShmSegmentInfo _shminfo;
     71     XImage* _image;
     72     Window _window;
     73     GC _gc;
     74     int32_t _width; // incoming frame width
     75     int32_t _height; // incoming frame height
     76     int32_t _outWidth; // render frame width
     77     int32_t _outHeight; // render frame height
     78     int32_t _xPos; // position within window
     79     int32_t _yPos;
     80     bool _prepared; // true if ready to use
     81     int32_t _dispCount;
     82 
     83     unsigned char* _buffer;
     84     float _top;
     85     float _left;
     86     float _right;
     87     float _bottom;
     88 
     89     int32_t _Id;
     90 
     91 };
     92 
     93 
     94 }  // namespace webrtc
     95 
     96 #endif // WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_LINUX_VIDEO_X11_CHANNEL_H_
     97