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diff --git a/cras/src/server/input_data.h b/cras/src/server/input_data.h
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-/* Copyright 2018 The Chromium OS 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 INPUT_DATA_H_
-#define INPUT_DATA_H_
-
-#include "cras_dsp_pipeline.h"
-#include "float_buffer.h"
-
-/*
- * Structure holding the information used when a chunk of input buffer
- * is accessed by multiple streams with different properties and
- * processing requirements.
- * Member:
- * ext - Provides interface to read and process buffer in dsp pipeline.
- * dev_ptr - Pointer to the associated input iodev.
- * area - The audio area used for deinterleaved data copy.
- * fbuffer - Floating point buffer from input device.
- */
-struct input_data {
- struct ext_dsp_module ext;
- void *dev_ptr;
- struct cras_audio_area *area;
- struct float_buffer *fbuffer;
-};
-
-/*
- * Creates an input_data instance for input iodev.
- * Args:
- * dev_ptr - Pointer to the associated input device.
- */
-struct input_data *input_data_create(void *dev_ptr);
-
-/* Destroys an input_data instance. */
-void input_data_destroy(struct input_data **data);
-
-/* Sets how many frames in buffer has been read by all input streams. */
-void input_data_set_all_streams_read(struct input_data *data,
- unsigned int nframes);
-
-/*
- * Gets an audio area for |stream| to read data from. An input_data may be
- * accessed by multiple streams while some requires processing, the
- * |offsets| arguments helps track the offset value each stream has read
- * into |data|.
- * Args:
- * data - The input data to get audio area from.
- * stream - The stream that reads data.
- * offsets - Structure holding the mapping from stream to the offset value
- * of how many frames each stream has read into input buffer.
- * area - To be filled with a pointer to an audio area struct for stream to
- * read data.
- * offset - To be filled with the samples offset in |area| that |stream|
- * should start reading.
- */
-int input_data_get_for_stream(struct input_data *data,
- struct cras_rstream *stream,
- struct buffer_share *offsets,
- struct cras_audio_area **area,
- unsigned int *offset);
-
-/*
- * Marks |frames| of audio data as read by |stream|.
- * Args:
- * data - The input_data to mark frames has been read by |stream|.
- * stream - The stream that has read audio data.
- * offsets - Structure holding the mapping from stream to the offset value
- * of how many frames each stream has read into input buffer.
- * frames - Number of frames |stream| has read.
- */
-int input_data_put_for_stream(struct input_data *data,
- struct cras_rstream *stream,
- struct buffer_share *offsets,
- unsigned int frames);
-
-/*
- * The software gain scaler of input path consist of two parts:
- * (1) The device gain scaler used when lack of hardware gain control.
- * Configured by the IntrinsicSensitivity label in alsa UCM config.
- * (2) The gain scaler in cras_rstream set by app, for example the AGC
- * module in Chrome.
- * Args:
- * data - The input data that holds pointer to APM instance.
- * idev_sw_agin_scaler - The gain scaler configured on input iodev.
- * stream - To provide stream layer software gain.
- * Returns:
- * 1.0 if tuned APM in use, otherwise |iodev gain| * |cras_rstream gain|
- */
-float input_data_get_software_gain_scaler(struct input_data *data,
- float idev_sw_gain_scaler,
- struct cras_rstream *stream);
-
-#endif /* INPUT_DATA_H_ */