ppapi/c/private/ppb_video_destination_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_destination_private.idl,
   7  *   modified Thu Apr 25 11:51:30 2013.
   8  */
   9
  10 #ifndef PPAPI_C_PRIVATE_PPB_VIDEO_DESTINATION_PRIVATE_H_
  11 #define PPAPI_C_PRIVATE_PPB_VIDEO_DESTINATION_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_VIDEODESTINATION_PRIVATE_INTERFACE_0_1 \
  24     "PPB_VideoDestination_Private;0.1"
  25 #define PPB_VIDEODESTINATION_PRIVATE_INTERFACE \
  26     PPB_VIDEODESTINATION_PRIVATE_INTERFACE_0_1
  27
  28 /**
  29  * @file
  30  * This file defines the <code>PPB_VideoDestination_Private</code> interface
  31  * for a video destination resource, which sends video frames to a MediaStream
  32  * video track in the browser.
  33  */
  34
  35
  36 /**
  37  * @addtogroup Interfaces
  38  * @{
  39  */
  40 /**
  41  * The <code>PPB_VideoDestination_Private</code> interface contains pointers to
  42  * several functions for creating video destination resources and using them to
  43  * send video frames to a MediaStream video track in the browser.
  44  */
  45 struct PPB_VideoDestination_Private_0_1 {
  46   /**
  47    * Creates a video destination resource.
  48    *
  49    * @param[in] instance A <code>PP_Instance</code> identifying an instance of
  50    * a module.
  51    *
  52    * @return A <code>PP_Resource</code> with a nonzero ID on success or zero on
  53    * failure. Failure means the instance was invalid.
  54    */
  55   PP_Resource (*Create)(PP_Instance instance);
  56   /**
  57    * Determines if a resource is a video destination resource.
  58    *
  59    * @param[in] resource The <code>PP_Resource</code> to test.
  60    *
  61    * @return A <code>PP_Bool</code> with <code>PP_TRUE</code> if the given
  62    * resource is a video destination resource or <code>PP_FALSE</code>
  63    * otherwise.
  64    */
  65   PP_Bool (*IsVideoDestination)(PP_Resource resource);
  66   /**
  67    * Opens a video destination for putting frames.
  68    *
  69    * @param[in] destination A <code>PP_Resource</code> corresponding to a video
  70    * destination resource.
  71    * @param[in] stream_url A <code>PP_Var</code> string holding a URL
  72    * identifying a MediaStream.
  73    * @param[in] callback A <code>PP_CompletionCallback</code> to be called upon
  74    * completion of Open().
  75    *
  76    * @return An int32_t containing a result code from <code>pp_errors.h</code>.
  77    * Returns PP_ERROR_BADRESOURCE if destination isn't a valid video
  78    * destination.
  79    * Returns PP_ERROR_INPROGRESS if destination is already open.
  80    * Returns PP_ERROR_FAILED if the MediaStream doesn't exist or if there is
  81    * some other browser error.
  82    */
  83   int32_t (*Open)(PP_Resource destination,
  84                   struct PP_Var stream_url,
  85                   struct PP_CompletionCallback callback);
  86   /**
  87    * Puts a frame to the video destination.
  88    *
  89    * After this call, you should take care to release your references to the
  90    * image embedded in the video frame. If you paint to the image after
  91    * PutFame(), there is the possibility of artifacts because the browser may
  92    * still be copying the frame to the stream.
  93    *
  94    * @param[in] destination A <code>PP_Resource</code> corresponding to a video
  95    * destination resource.
  96    * @param[in] frame A <code>PP_VideoFrame_Private</code> holding the video
  97    * frame to send to the destination.
  98    *
  99    * @return An int32_t containing a result code from <code>pp_errors.h</code>.
 100    * Returns PP_ERROR_BADRESOURCE if destination isn't a valid video
 101    * destination.
 102    * Returns PP_ERROR_FAILED if destination is not open, if the video frame has
 103    * an invalid image data resource, or if some other browser error occurs.
 104    */
 105   int32_t (*PutFrame)(PP_Resource destination,
 106                       const struct PP_VideoFrame_Private* frame);
 107   /**
 108    * Closes the video destination.
 109    *
 110    * @param[in] destination A <code>PP_Resource</code> corresponding to a video
 111    * destination.
 112    */
 113   void (*Close)(PP_Resource destination);
 114 };
 115
 116 typedef struct PPB_VideoDestination_Private_0_1 PPB_VideoDestination_Private;
 117 /**
 118  * @}
 119  */
 120
 121 #endif  /* PPAPI_C_PRIVATE_PPB_VIDEO_DESTINATION_PRIVATE_H_ */
 122