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      1 /*
      2  * libjingle
      3  * Copyright 2010 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_DEVICES_YUVFRAMESCAPTURER_H_
     29 #define TALK_MEDIA_DEVICES_YUVFRAMESCAPTURER_H_
     30 
     31 #include <string>
     32 #include <vector>
     33 
     34 #include "talk/media/base/videocapturer.h"
     35 #include "talk/media/base/yuvframegenerator.h"
     36 #include "webrtc/base/stream.h"
     37 #include "webrtc/base/stringutils.h"
     38 
     39 
     40 namespace rtc {
     41 class FileStream;
     42 }
     43 
     44 namespace cricket {
     45 
     46 
     47 // Simulated video capturer that periodically reads frames from a file.
     48 class YuvFramesCapturer : public VideoCapturer {
     49  public:
     50   YuvFramesCapturer();
     51   YuvFramesCapturer(int width, int height);
     52   virtual ~YuvFramesCapturer();
     53 
     54   static const char* kYuvFrameDeviceName;
     55   static Device CreateYuvFramesCapturerDevice() {
     56     std::stringstream id;
     57     id << kYuvFrameDeviceName;
     58     return Device(id.str(), id.str());
     59   }
     60   static bool IsYuvFramesCapturerDevice(const Device& device) {
     61     return rtc::starts_with(device.id.c_str(), kYuvFrameDeviceName);
     62   }
     63 
     64   void Init();
     65   // Override virtual methods of parent class VideoCapturer.
     66   virtual CaptureState Start(const VideoFormat& capture_format);
     67   virtual void Stop();
     68   virtual bool IsRunning();
     69   virtual bool IsScreencast() const { return false; }
     70 
     71  protected:
     72   // Override virtual methods of parent class VideoCapturer.
     73   virtual bool GetPreferredFourccs(std::vector<uint32_t>* fourccs);
     74 
     75   // Read a frame and determine how long to wait for the next frame.
     76   void ReadFrame(bool first_frame);
     77 
     78  private:
     79   class YuvFramesThread;  // Forward declaration, defined in .cc.
     80 
     81   YuvFrameGenerator* frame_generator_;
     82   CapturedFrame captured_frame_;
     83   YuvFramesThread* frames_generator_thread;
     84   int width_;
     85   int height_;
     86   uint32_t frame_data_size_;
     87   uint32_t frame_index_;
     88 
     89   int64_t barcode_reference_timestamp_millis_;
     90   int32_t barcode_interval_;
     91   int32_t GetBarcodeValue();
     92 
     93   RTC_DISALLOW_COPY_AND_ASSIGN(YuvFramesCapturer);
     94 };
     95 
     96 }  // namespace cricket
     97 
     98 #endif  // TALK_MEDIA_DEVICES_YUVFRAMESCAPTURER_H_
     99