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diff --git a/ppapi/c/dev/ppb_audio_input_dev.h b/ppapi/c/dev/ppb_audio_input_dev.h
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+/* 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.
+ */
+
+/* From dev/ppb_audio_input_dev.idl modified Mon Nov 14 17:58:16 2011. */
+
+#ifndef PPAPI_C_DEV_PPB_AUDIO_INPUT_DEV_H_
+#define PPAPI_C_DEV_PPB_AUDIO_INPUT_DEV_H_
+
+#include "ppapi/c/pp_bool.h"
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/c/pp_macros.h"
+#include "ppapi/c/pp_resource.h"
+#include "ppapi/c/pp_stdint.h"
+
+#define PPB_AUDIO_INPUT_DEV_INTERFACE_0_1 "PPB_AudioInput(Dev);0.1"
+#define PPB_AUDIO_INPUT_DEV_INTERFACE PPB_AUDIO_INPUT_DEV_INTERFACE_0_1
+
+/**
+ * @file
+ * This file defines the <code>PPB_AudioInput_Dev</code> interface, which
+ * provides realtime audio input capture.
+ */
+
+
+/**
+ * @addtogroup Typedefs
+ * @{
+ */
+/**
+ * <code>PPB_AudioInput_Callback</code> defines the type of an audio callback
+ * function used to provide the audio buffer with data. This callback will be
+ * called on a separate thread to the creation thread.
+ */
+typedef void (*PPB_AudioInput_Callback)(void* sample_buffer,
+ uint32_t buffer_size_in_bytes,
+ void* user_data);
+/**
+ * @}
+ */
+
+/**
+ * @addtogroup Interfaces
+ * @{
+ */
+/**
+ * The <code>PPB_AudioInput_Dev</code> interface contains pointers to several
+ * functions for handling audio input resources.
+ */
+struct PPB_AudioInput_Dev {
+ /**
+ * Create is a pointer to a function that creates an audio input resource.
+ * No sound will be captured until StartCapture() is called.
+ */
+ PP_Resource (*Create)(PP_Instance instance,
+ PP_Resource config,
+ PPB_AudioInput_Callback audio_input_callback,
+ void* user_data);
+ /**
+ * IsAudioInput is a pointer to a function that determines if the given
+ * resource is an audio input resource.
+ *
+ * @param[in] resource A PP_Resource containing a resource.
+ *
+ * @return A PP_BOOL containing containing PP_TRUE if the given resource is
+ * an audio input resource, otherwise PP_FALSE.
+ */
+ PP_Bool (*IsAudioInput)(PP_Resource audio_input);
+ /**
+ * GetCurrrentConfig() returns an audio config resource for the given audio
+ * resource.
+ *
+ * @param[in] config A <code>PP_Resource</code> corresponding to an audio
+ * resource.
+ *
+ * @return A <code>PP_Resource</code> containing the audio config resource if
+ * successful.
+ */
+ PP_Resource (*GetCurrentConfig)(PP_Resource audio_input);
+ /**
+ * StartCapture() starts the capture of the audio input resource and begins
+ * periodically calling the callback.
+ *
+ * @param[in] config A <code>PP_Resource</code> corresponding to an audio
+ * input resource.
+ *
+ * @return A <code>PP_Bool</code> containing <code>PP_TRUE</code> if
+ * successful, otherwise <code>PP_FALSE</code>. Also returns
+ * <code>PP_TRUE</code> (and be a no-op) if called while callback is already
+ * in progress.
+ */
+ PP_Bool (*StartCapture)(PP_Resource audio_input);
+ /**
+ * StopCapture is a pointer to a function that stops the capture of
+ * the audio input resource.
+ *
+ * @param[in] config A PP_Resource containing the audio input resource.
+ *
+ * @return A PP_BOOL containing PP_TRUE if successful, otherwise PP_FALSE.
+ * Also returns PP_TRUE (and is a no-op) if called while capture is already
+ * stopped. If a buffer is being captured, StopCapture will block until the
+ * call completes.
+ */
+ PP_Bool (*StopCapture)(PP_Resource audio_input);
+};
+/**
+ * @}
+ */
+
+#endif /* PPAPI_C_DEV_PPB_AUDIO_INPUT_DEV_H_ */
+