1 /* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef VideoFrameProvider_h 32 #define VideoFrameProvider_h 33 34 #include "VideoFrameChromium.h" 35 36 namespace WebCore { 37 38 class VideoFrameProvider { 39 public: ~VideoFrameProvider()40 virtual ~VideoFrameProvider() { } 41 42 // This function returns a pointer to a VideoFrameChromium, which is 43 // the WebCore wrapper for a video frame in Chromium. getCurrentFrame() 44 // places a lock on the frame in Chromium. Calls to this method should 45 // always be followed with a call to putCurrentFrame(). 46 // The ownership of the object is not transferred to the caller and 47 // the caller should not free the returned object. 48 virtual VideoFrameChromium* getCurrentFrame() = 0; 49 // This function releases the lock on the video frame in chromium. It should 50 // always be called after getCurrentFrame(). Frames passed into this method 51 // should no longer be referenced after the call is made. 52 virtual void putCurrentFrame(VideoFrameChromium*) = 0; 53 }; 54 55 } // namespace WebCore 56 57 #endif 58