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Diffstat (limited to 'cras/src/dsp/eq2.h')
-rw-r--r-- | cras/src/dsp/eq2.h | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/cras/src/dsp/eq2.h b/cras/src/dsp/eq2.h deleted file mode 100644 index dfa9a1df..00000000 --- a/cras/src/dsp/eq2.h +++ /dev/null @@ -1,71 +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 EQ2_H_ -#define EQ2_H_ - -#ifdef __cplusplus -extern "C" { -#endif - -/* "eq2" is a two channel version of the "eq" filter. It processes two channels - * of data at once to increase performance. */ - -#include "biquad.h" - -/* Maximum number of biquad filters an EQ2 can have per channel */ -#define MAX_BIQUADS_PER_EQ2 10 - -struct eq2; - -/* Create an EQ2. */ -struct eq2 *eq2_new(); - -/* Free an EQ2. */ -void eq2_free(struct eq2 *eq2); - -/* Append a biquad filter to an EQ2. An EQ2 can have at most MAX_BIQUADS_PER_EQ2 - * biquad filters per channel. - * Args: - * eq2 - The EQ2 we want to use. - * channel - 0 or 1. The channel we want to append the filter to. - * 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 eq2_append_biquad(struct eq2 *eq2, int channel, enum biquad_type type, - float freq, float Q, float gain); - -/* Append a biquad filter to an EQ2. An EQ2 can have at most MAX_BIQUADS_PER_EQ2 - * biquad filters. This is similar to eq2_append_biquad(), but it specifies the - * biquad coefficients directly. - * Args: - * eq2 - The EQ2 we want to use. - * channel - 0 or 1. The channel we want to append the filter to. - * biquad - The parameters for the biquad filter. - * Returns: - * 0 if success. -1 if the eq has no room for more biquads. - */ -int eq2_append_biquad_direct(struct eq2 *eq2, int channel, - const struct biquad *biquad); - -/* Process a buffer of audio data through the EQ2. - * Args: - * eq2 - The EQ2 we want to use. - * data0 - The array of channel 0 audio samples. - * data1 - The array of channel 1 audio samples. - * count - The number of elements in each of the data array to process. - */ -void eq2_process(struct eq2 *eq2, float *data0, float *data1, int count); - -#ifdef __cplusplus -} /* extern "C" */ -#endif - -#endif /* EQ2_H_ */ |