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      1 /*
      2  * libjingle
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #ifndef TALK_MEDIA_BASE_FAKEVIDEORENDERER_H_
     29 #define TALK_MEDIA_BASE_FAKEVIDEORENDERER_H_
     30 
     31 #include "talk/base/sigslot.h"
     32 #include "talk/media/base/videoframe.h"
     33 #include "talk/media/base/videorenderer.h"
     34 
     35 namespace cricket {
     36 
     37 // Faked video renderer that has a callback for actions on rendering.
     38 class FakeVideoRenderer : public VideoRenderer {
     39  public:
     40   FakeVideoRenderer()
     41       : errors_(0),
     42         width_(0),
     43         height_(0),
     44         num_set_sizes_(0),
     45         num_rendered_frames_(0),
     46         black_frame_(false) {
     47   }
     48 
     49   virtual bool SetSize(int width, int height, int reserved) {
     50     width_ = width;
     51     height_ = height;
     52     ++num_set_sizes_;
     53     SignalSetSize(width, height, reserved);
     54     return true;
     55   }
     56 
     57   virtual bool RenderFrame(const VideoFrame* frame) {
     58     // TODO(zhurunz) Check with VP8 team to see if we can remove this
     59     // tolerance on Y values.
     60     black_frame_ = CheckFrameColorYuv(6, 48, 128, 128, 128, 128, frame);
     61     // Treat unexpected frame size as error.
     62     if (!frame ||
     63         frame->GetWidth() != static_cast<size_t>(width_) ||
     64         frame->GetHeight() != static_cast<size_t>(height_)) {
     65       ++errors_;
     66       return false;
     67     }
     68     ++num_rendered_frames_;
     69     SignalRenderFrame(frame);
     70     return true;
     71   }
     72 
     73   int errors() const { return errors_; }
     74   int width() const { return width_; }
     75   int height() const { return height_; }
     76   int num_set_sizes() const { return num_set_sizes_; }
     77   int num_rendered_frames() const { return num_rendered_frames_; }
     78   bool black_frame() const { return black_frame_; }
     79 
     80   sigslot::signal3<int, int, int> SignalSetSize;
     81   sigslot::signal1<const VideoFrame*> SignalRenderFrame;
     82 
     83  private:
     84   static bool CheckFrameColorYuv(uint8 y_min, uint8 y_max,
     85                                  uint8 u_min, uint8 u_max,
     86                                  uint8 v_min, uint8 v_max,
     87                                  const cricket::VideoFrame* frame) {
     88     if (!frame) {
     89       return false;
     90     }
     91     // Y
     92     size_t y_width = frame->GetWidth();
     93     size_t y_height = frame->GetHeight();
     94     const uint8* y_plane = frame->GetYPlane();
     95     const uint8* y_pos = y_plane;
     96     int32 y_pitch = frame->GetYPitch();
     97     for (size_t i = 0; i < y_height; ++i) {
     98       for (size_t j = 0; j < y_width; ++j) {
     99         uint8 y_value = *(y_pos + j);
    100         if (y_value < y_min || y_value > y_max) {
    101           return false;
    102         }
    103       }
    104       y_pos += y_pitch;
    105     }
    106     // U and V
    107     size_t chroma_width = frame->GetChromaWidth();
    108     size_t chroma_height = frame->GetChromaHeight();
    109     const uint8* u_plane = frame->GetUPlane();
    110     const uint8* v_plane = frame->GetVPlane();
    111     const uint8* u_pos = u_plane;
    112     const uint8* v_pos = v_plane;
    113     int32 u_pitch = frame->GetUPitch();
    114     int32 v_pitch = frame->GetVPitch();
    115     for (size_t i = 0; i < chroma_height; ++i) {
    116       for (size_t j = 0; j < chroma_width; ++j) {
    117         uint8 u_value = *(u_pos + j);
    118         if (u_value < u_min || u_value > u_max) {
    119           return false;
    120         }
    121         uint8 v_value = *(v_pos + j);
    122         if (v_value < v_min || v_value > v_max) {
    123           return false;
    124         }
    125       }
    126       u_pos += u_pitch;
    127       v_pos += v_pitch;
    128     }
    129     return true;
    130   }
    131 
    132   int errors_;
    133   int width_;
    134   int height_;
    135   int num_set_sizes_;
    136   int num_rendered_frames_;
    137   bool black_frame_;
    138 };
    139 
    140 }  // namespace cricket
    141 
    142 #endif  // TALK_MEDIA_BASE_FAKEVIDEORENDERER_H_
    143