ppapi/c/private/ppb_video_source_private.h

   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
   6 /* From private/ppb_video_source_private.idl,
   7  *   modified Mon Oct 27 16:13:24 2014.
   8  */
   9
  10 #ifndef PPAPI_C_PRIVATE_PPB_VIDEO_SOURCE_PRIVATE_H_
  11 #define PPAPI_C_PRIVATE_PPB_VIDEO_SOURCE_PRIVATE_H_
  12
  13 #include "ppapi/c/pp_bool.h"
  14 #include "ppapi/c/pp_completion_callback.h"
  15 #include "ppapi/c/pp_instance.h"
  16 #include "ppapi/c/pp_macros.h"
  17 #include "ppapi/c/pp_resource.h"
  18 #include "ppapi/c/pp_stdint.h"
  19 #include "ppapi/c/pp_time.h"
  20 #include "ppapi/c/pp_var.h"
  21 #include "ppapi/c/private/pp_video_frame_private.h"
  22
  23 #define PPB_VIDEOSOURCE_PRIVATE_INTERFACE_0_1 "PPB_VideoSource_Private;0.1"
  24 #define PPB_VIDEOSOURCE_PRIVATE_INTERFACE PPB_VIDEOSOURCE_PRIVATE_INTERFACE_0_1
  25
  26 /**
  27  * @file
  28  * This file defines the <code>PPB_VideoSource_Private</code> interface for a
  29  * video source resource, which receives video frames from a MediaStream video
  30  * track in the browser.
  31  */
  32
  33
  34 /**
  35  * @addtogroup Interfaces
  36  * @{
  37  */
  38 /**
  39  * The <code>PPB_VideoSource_Private</code> interface contains pointers to
  40  * several functions for creating video source resources and using them to
  41  * receive video frames from a MediaStream video track in the browser.
  42  */
  43 struct PPB_VideoSource_Private_0_1 {
  44   /**
  45    * Creates a video source resource.
  46    *
  47    * @param[in] instance A <code>PP_Instance</code> identifying an instance of
  48    * a module.
  49    *
  50    * @return A <code>PP_Resource</code> with a nonzero ID on success or zero on
  51    * failure. Failure means the instance was invalid.
  52    */
  53   PP_Resource (*Create)(PP_Instance instance);
  54   /**
  55    * Determines if a resource is a video source resource.
  56    *
  57    * @param[in] resource The <code>PP_Resource</code> to test.
  58    *
  59    * @return A <code>PP_Bool</code> with <code>PP_TRUE</code> if the given
  60    * resource is a video source resource or <code>PP_FALSE</code> otherwise.
  61    */
  62   PP_Bool (*IsVideoSource)(PP_Resource resource);
  63   /**
  64    * Opens a video source for getting frames.
  65    *
  66    * @param[in] source A <code>PP_Resource</code> corresponding to a video
  67    * source resource.
  68    * @param[in] stream_url A <code>PP_Var</code> string holding a URL
  69    * identifying a MediaStream.
  70    * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
  71    * completion of Open().
  72    *
  73    * @return An int32_t containing a result code from <code>pp_errors.h</code>.
  74    * Returns PP_ERROR_BADRESOURCE if source isn't a valid video source.
  75    * Returns PP_ERROR_INPROGRESS if source is already open.
  76    * Returns PP_ERROR_FAILED if the MediaStream doesn't exist or if there is
  77    * some other browser error.
  78    */
  79   int32_t (*Open)(PP_Resource source,
  80                   struct PP_Var stream_url,
  81                   struct PP_CompletionCallback callback);
  82   /**
  83    * Gets a frame from the video source. The returned image data is only valid
  84    * until the next call to GetFrame.
  85    * The image data resource inside the returned frame will have its reference
  86    * count incremented by one and must be managed by the plugin.
  87    *
  88    * @param[in] source A <code>PP_Resource</code> corresponding to a video
  89    * source resource.
  90    * @param[out] frame A <code>PP_VideoFrame_Private</code> to hold a video
  91    * frame from the source.
  92    * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
  93    * completion of GetNextFrame().
  94    *
  95    * @return An int32_t containing a result code from <code>pp_errors.h</code>.
  96    * Returns PP_ERROR_BADRESOURCE if source isn't a valid video source.
  97    * Returns PP_ERROR_FAILED if the source is not open, or if some other
  98    * browser error occurs.
  99    */
 100   int32_t (*GetFrame)(PP_Resource source,
 101                       struct PP_VideoFrame_Private* frame,
 102                       struct PP_CompletionCallback callback);
 103   /**
 104    * Closes the video source.
 105    *
 106    * @param[in] source A <code>PP_Resource</code> corresponding to a video
 107    * source resource.
 108    */
 109   void (*Close)(PP_Resource source);
 110 };
 111
 112 typedef struct PPB_VideoSource_Private_0_1 PPB_VideoSource_Private;
 113 /**
 114  * @}
 115  */
 116
 117 #endif  /* PPAPI_C_PRIVATE_PPB_VIDEO_SOURCE_PRIVATE_H_ */
 118