| /* Copyright (c) 2012 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 CRAS_MIX_OPS_H_ |
| #define CRAS_MIX_OPS_H_ |
| |
| #include <stdint.h> |
| |
| #include "cras_system_state.h" |
| |
| extern const struct cras_mix_ops mixer_ops; |
| extern const struct cras_mix_ops mixer_ops_sse42; |
| extern const struct cras_mix_ops mixer_ops_avx; |
| extern const struct cras_mix_ops mixer_ops_avx2; |
| extern const struct cras_mix_ops mixer_ops_fma; |
| |
| /* Struct containing ops to implement mix/scale on a buffer of samples. |
| * Different architecture can provide different implementations and wraps |
| * the implementations into cras_mix_ops. |
| * Different sample formats will be handled by different implementations. |
| * The usage of each operation is explained in cras_mix.h |
| * |
| * Members: |
| * scale_buffer_increment: See cras_scale_buffer_increment. |
| * scale_buffer: See cras_scale_buffer. |
| * add: See cras_mix_add. |
| * add_scale_stride: See cras_mix_add_scale_stride. |
| * mute_buffer: cras_mix_mute_buffer. |
| */ |
| struct cras_mix_ops { |
| void (*scale_buffer_increment)(snd_pcm_format_t fmt, uint8_t *buff, |
| unsigned int count, float scaler, |
| float increment, float target, int step); |
| void (*scale_buffer)(snd_pcm_format_t fmt, uint8_t *buff, |
| unsigned int count, float scaler); |
| void (*add)(snd_pcm_format_t fmt, uint8_t *dst, uint8_t *src, |
| unsigned int count, unsigned int index, int mute, |
| float mix_vol); |
| void (*add_scale_stride)(snd_pcm_format_t fmt, uint8_t *dst, |
| uint8_t *src, unsigned int count, |
| unsigned int dst_stride, |
| unsigned int src_stride, float scaler); |
| size_t (*mute_buffer)(uint8_t *dst, size_t frame_bytes, size_t count); |
| }; |
| #endif |