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Diffstat (limited to 'cras/src/dsp/eq.h')
-rw-r--r-- | cras/src/dsp/eq.h | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/cras/src/dsp/eq.h b/cras/src/dsp/eq.h deleted file mode 100644 index 212f653c..00000000 --- a/cras/src/dsp/eq.h +++ /dev/null @@ -1,67 +0,0 @@ -/* Copyright (c) 2013 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 EQ_H_ -#define EQ_H_ - -#ifdef __cplusplus -extern "C" { -#endif - -/* An EQ is a chain of biquad filters. See Web Audio API spec for details of the - * biquad filters and their parameters. */ - -#include "biquad.h" - -/* Maximum number of biquad filters an EQ can have */ -#define MAX_BIQUADS_PER_EQ 10 - -struct eq; - -/* Create an EQ. */ -struct eq *eq_new(); - -/* Free an EQ. */ -void eq_free(struct eq *eq); - -/* Append a biquad filter to an EQ. An EQ can have at most MAX_BIQUADS_PER_EQ - * biquad filters. - * Args: - * eq - The EQ we want to use. - * type - The type of the biquad filter we want to append. - * frequency - The value should be in the range [0, 1]. It is relative to - * half of the sampling rate. - * Q, gain - The meaning depends on the type of the filter. See Web Audio - * API for details. - * Returns: - * 0 if success. -1 if the eq has no room for more biquads. - */ -int eq_append_biquad(struct eq *eq, enum biquad_type type, float freq, float Q, - float gain); - -/* Append a biquad filter to an EQ. An EQ can have at most MAX_BIQUADS_PER_EQ - * biquad filters. This is similar to eq_append_biquad(), but it specifies the - * biquad coefficients directly. - * Args: - * eq - The EQ we want to use. - * biquad - The parameters for the biquad filter. - * Returns: - * 0 if success. -1 if the eq has no room for more biquads. - */ -int eq_append_biquad_direct(struct eq *eq, const struct biquad *biquad); - -/* Process a buffer of audio data through the EQ. - * Args: - * eq - The EQ we want to use. - * data - The array of audio samples. - * count - The number of elements in the data array to process. - */ -void eq_process(struct eq *eq, float *data, int count); - -#ifdef __cplusplus -} /* extern "C" */ -#endif - -#endif /* EQ_H_ */ |