Removed Doxygen groupings by ppb_, pp_, and ppp_. Added grouping by construct...

ppapi/c/ppb_audio.h

 /* Copyright (c) 2011 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef PPAPI_C_PPB_AUDIO_H_
 #define PPAPI_C_PPB_AUDIO_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
 
 #define PPB_AUDIO_INTERFACE "PPB_Audio;0.5"
 
+/**
+ * @addtogroup Typedefs
+ * @{
+ */
 // Callback function type for SetCallback.
 typedef void (*PPB_Audio_Callback)(void* sample_buffer,
                                    size_t buffer_size_in_bytes,
                                    void* user_data);
+/**
+ * @}
+ */
 
+/**
+ * @addtogroup Structs
+ * @{
+ */
 // Callback-based audio interface. User of audio must set the callback that will
 // be called each time that the buffer needs to be filled.
 //
 // A C++ example:
 //
 // void audio_callback(void* sample_buffer,
 //                     size_t buffer_size_in_bytes,
 //                     void* user_data) {
 //   ... fill in the buffer with samples ...
 // }
@@ skipping 30 matching lines @@
   // Start the playback. Begin periodically calling the callback. If called
   // while playback is already in progress, will return PP_TRUE and be a no-op.
   // On error, return PP_FALSE.
   PP_Bool (*StartPlayback)(PP_Resource audio);
 
   // Stop the playback. If playback is already stopped, this is a no-op and
   // returns PP_TRUE. On error, returns PP_FALSE. If a callback is in progress,
   // StopPlayback will block until callback completes.
   PP_Bool (*StopPlayback)(PP_Resource audio);
 };
+/**
+ * @}
+ */
 
 #endif  /* PPAPI_C_PPB_DEVICE_CONTEXT_AUDIO_H_ */