summaryrefslogtreecommitdiff
path: root/cras/src/dsp/eq.h
diff options
context:
space:
mode:
Diffstat (limited to 'cras/src/dsp/eq.h')
-rw-r--r--cras/src/dsp/eq.h67
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_ */