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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_EFFECTDOWNMIX_H_
#define ANDROID_EFFECTDOWNMIX_H_
#include <audio_effects/effect_downmix.h>
#include <audio_utils/primitives.h>
#include <system/audio.h>
/*------------------------------------
* definitions
*------------------------------------
*/
#define DOWNMIX_OUTPUT_CHANNELS AUDIO_CHANNEL_OUT_STEREO
typedef enum {
DOWNMIX_STATE_UNINITIALIZED,
DOWNMIX_STATE_INITIALIZED,
DOWNMIX_STATE_ACTIVE,
} downmix_state_t;
/* parameters for each downmixer */
typedef struct {
downmix_state_t state;
downmix_type_t type;
bool apply_volume_correction;
uint8_t input_channel_count;
} downmix_object_t;
typedef struct downmix_module_s {
const struct effect_interface_s *itfe;
effect_config_t config;
downmix_object_t context;
} downmix_module_t;
const uint32_t kSides = AUDIO_CHANNEL_OUT_SIDE_LEFT | AUDIO_CHANNEL_OUT_SIDE_RIGHT;
const uint32_t kBacks = AUDIO_CHANNEL_OUT_BACK_LEFT | AUDIO_CHANNEL_OUT_BACK_RIGHT;
const uint32_t kUnsupported =
AUDIO_CHANNEL_OUT_FRONT_LEFT_OF_CENTER | AUDIO_CHANNEL_OUT_FRONT_RIGHT_OF_CENTER |
AUDIO_CHANNEL_OUT_TOP_CENTER |
AUDIO_CHANNEL_OUT_TOP_FRONT_LEFT |
AUDIO_CHANNEL_OUT_TOP_FRONT_CENTER |
AUDIO_CHANNEL_OUT_TOP_FRONT_RIGHT |
AUDIO_CHANNEL_OUT_TOP_BACK_LEFT |
AUDIO_CHANNEL_OUT_TOP_BACK_CENTER |
AUDIO_CHANNEL_OUT_TOP_BACK_RIGHT;
/*------------------------------------
* Effect API
*------------------------------------
*/
int32_t DownmixLib_Create(const effect_uuid_t *uuid,
int32_t sessionId,
int32_t ioId,
effect_handle_t *pHandle);
int32_t DownmixLib_Release(effect_handle_t handle);
int32_t DownmixLib_GetDescriptor(const effect_uuid_t *uuid,
effect_descriptor_t *pDescriptor);
static int Downmix_Process(effect_handle_t self,
audio_buffer_t *inBuffer,
audio_buffer_t *outBuffer);
static int Downmix_Command(effect_handle_t self,
uint32_t cmdCode,
uint32_t cmdSize,
void *pCmdData,
uint32_t *replySize,
void *pReplyData);
static int Downmix_GetDescriptor(effect_handle_t self,
effect_descriptor_t *pDescriptor);
/*------------------------------------
* internal functions
*------------------------------------
*/
int Downmix_Init(downmix_module_t *pDwmModule);
int Downmix_Configure(downmix_module_t *pDwmModule, effect_config_t *pConfig, bool init);
int Downmix_Reset(downmix_object_t *pDownmixer, bool init);
int Downmix_setParameter(downmix_object_t *pDownmixer, int32_t param, uint32_t size, void *pValue);
int Downmix_getParameter(downmix_object_t *pDownmixer, int32_t param, uint32_t *pSize, void *pValue);
void Downmix_foldFromQuad(int16_t *pSrc, int16_t*pDst, size_t numFrames, bool accumulate);
void Downmix_foldFrom5Point1(int16_t *pSrc, int16_t*pDst, size_t numFrames, bool accumulate);
void Downmix_foldFrom7Point1(int16_t *pSrc, int16_t*pDst, size_t numFrames, bool accumulate);
bool Downmix_foldGeneric(
uint32_t mask, int16_t *pSrc, int16_t*pDst, size_t numFrames, bool accumulate);
#endif /*ANDROID_EFFECTDOWNMIX_H_*/
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