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| 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef PPAPI_CPP_PRIVATE_VIDEO_DESTINATION_PRIVATE_H_ |
| 6 #define PPAPI_CPP_PRIVATE_VIDEO_DESTINATION_PRIVATE_H_ |
| 7 |
| 8 #include <string> |
| 9 |
| 10 #include "ppapi/c/pp_time.h" |
| 11 #include "ppapi/cpp/completion_callback.h" |
| 12 #include "ppapi/cpp/pass_ref.h" |
| 13 #include "ppapi/cpp/resource.h" |
| 14 |
| 15 /// @file |
| 16 /// This file defines the <code>PPB_VideoDestination_Private</code> interface |
| 17 /// for a video destination resource. A video destination sends video frames to |
| 18 /// a MediaStream video track. |
| 19 |
| 20 namespace pp { |
| 21 |
| 22 class InstanceHandle; |
| 23 class VideoFrame_Private; |
| 24 |
| 25 /// The <code>VideoDestination_Private</code> class contains methods for |
| 26 /// creating video destination resources and using them to send video frames to |
| 27 /// a MediaStream in the browser. |
| 28 class VideoDestination_Private : public Resource { |
| 29 public: |
| 30 /// Default constructor for creating a <code>VideoDestination_Private</code> |
| 31 /// object. |
| 32 VideoDestination_Private(); |
| 33 |
| 34 /// Constructor for creating a <code>VideoDestination_Private</code> for an |
| 35 /// instance. |
| 36 explicit VideoDestination_Private(const InstanceHandle& instance); |
| 37 |
| 38 /// The copy constructor for <code>VideoDestination_Private</code>. |
| 39 /// |
| 40 /// @param[in] other A reference to a <code>VideoDestination_Private</code>. |
| 41 VideoDestination_Private(const VideoDestination_Private& other); |
| 42 |
| 43 /// A constructor used when you have received a PP_Resource as a return |
| 44 /// value that has had its reference count incremented for you. |
| 45 /// |
| 46 /// @param[in] resource A PP_Resource corresponding to a video destination. |
| 47 VideoDestination_Private(PassRef, PP_Resource resource); |
| 48 |
| 49 /// Opens a video destination for sending frames. |
| 50 /// |
| 51 /// @param[in] stream_id A <code>Var</code> holding a string uniquely |
| 52 /// identifying a MediaStream. |
| 53 /// @param[in] callback A <code>CompletionCallback</code> to be |
| 54 /// called upon completion of Open(). |
| 55 /// |
| 56 /// @return An int32_t containing a result code from <code>pp_errors.h</code>. |
| 57 /// Returns PP_ERROR_BADRESOURCE if destination isn't a valid video |
| 58 /// destination. |
| 59 /// Returns PP_ERROR_INPROGRESS if destination is already open. |
| 60 /// Returns PP_ERROR_FAILED if the MediaStream doesn't exist or if there is |
| 61 /// some other browser error. |
| 62 int32_t Open(const Var& stream_id, const CompletionCallback& cc); |
| 63 |
| 64 /// Sends a frame of video to the video destination. |
| 65 /// |
| 66 /// After this call, you should take care to release your references to the |
| 67 /// image embedded in the video frame. If you paint to the image after |
| 68 /// SendFrame(), there is the possibility of artifacts because the browser may |
| 69 /// still be copying the frame to the stream. |
| 70 /// |
| 71 /// @param[in] frame A <code>VideoFrame_Private</code> holding the video |
| 72 /// frame to send to the destination. |
| 73 /// |
| 74 /// @return An int32_t containing a result code from <code>pp_errors.h</code>. |
| 75 /// Returns PP_ERROR_BADRESOURCE if destination isn't a valid video |
| 76 /// destination. |
| 77 /// Returns PP_ERROR_FAILED if destination is not open, if the video frame has |
| 78 /// an invalid image data resource, or if some other browser error occurs. |
| 79 int32_t SendFrame(const VideoFrame_Private& frame); |
| 80 |
| 81 /// Closes the video destination. |
| 82 void Close(); |
| 83 }; |
| 84 |
| 85 } // namespace pp |
| 86 |
| 87 #endif // PPAPI_CPP_PRIVATE_VIDEO_DESTINATION_PRIVATE_H_ |
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