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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_AUDIO_PROCESSING_AECM_ECHO_CONTROL_MOBILE_H_
#define MODULES_AUDIO_PROCESSING_AECM_ECHO_CONTROL_MOBILE_H_
#include <stddef.h>
#include <stdint.h>
namespace webrtc {
enum { AecmFalse = 0, AecmTrue };
// Errors
#define AECM_UNSPECIFIED_ERROR 12000
#define AECM_UNSUPPORTED_FUNCTION_ERROR 12001
#define AECM_UNINITIALIZED_ERROR 12002
#define AECM_NULL_POINTER_ERROR 12003
#define AECM_BAD_PARAMETER_ERROR 12004
// Warnings
#define AECM_BAD_PARAMETER_WARNING 12100
typedef struct {
int16_t cngMode; // AECM_FALSE, AECM_TRUE (default)
int16_t echoMode; // 0, 1, 2, 3 (default), 4
} AecmConfig;
#ifdef __cplusplus
extern "C" {
#endif
/*
* Allocates the memory needed by the AECM. The memory needs to be
* initialized separately using the WebRtcAecm_Init() function.
* Returns a pointer to the instance and a nullptr at failure.
*/
void* WebRtcAecm_Create();
/*
* This function releases the memory allocated by WebRtcAecm_Create()
*
* Inputs Description
* -------------------------------------------------------------------
* void* aecmInst Pointer to the AECM instance
*/
void WebRtcAecm_Free(void* aecmInst);
/*
* Initializes an AECM instance.
*
* Inputs Description
* -------------------------------------------------------------------
* void* aecmInst Pointer to the AECM instance
* int32_t sampFreq Sampling frequency of data
*
* Outputs Description
* -------------------------------------------------------------------
* int32_t return 0: OK
* 1200-12004,12100: error/warning
*/
int32_t WebRtcAecm_Init(void* aecmInst, int32_t sampFreq);
/*
* Inserts an 80 or 160 sample block of data into the farend buffer.
*
* Inputs Description
* -------------------------------------------------------------------
* void* aecmInst Pointer to the AECM instance
* int16_t* farend In buffer containing one frame of
* farend signal
* int16_t nrOfSamples Number of samples in farend buffer
*
* Outputs Description
* -------------------------------------------------------------------
* int32_t return 0: OK
* 1200-12004,12100: error/warning
*/
int32_t WebRtcAecm_BufferFarend(void* aecmInst,
const int16_t* farend,
size_t nrOfSamples);
/*
* Reports any errors that would arise when buffering a farend buffer.
*
* Inputs Description
* -------------------------------------------------------------------
* void* aecmInst Pointer to the AECM instance
* int16_t* farend In buffer containing one frame of
* farend signal
* int16_t nrOfSamples Number of samples in farend buffer
*
* Outputs Description
* -------------------------------------------------------------------
* int32_t return 0: OK
* 1200-12004,12100: error/warning
*/
int32_t WebRtcAecm_GetBufferFarendError(void* aecmInst,
const int16_t* farend,
size_t nrOfSamples);
/*
* Runs the AECM on an 80 or 160 sample blocks of data.
*
* Inputs Description
* -------------------------------------------------------------------
* void* aecmInst Pointer to the AECM instance
* int16_t* nearendNoisy In buffer containing one frame of
* reference nearend+echo signal. If
* noise reduction is active, provide
* the noisy signal here.
* int16_t* nearendClean In buffer containing one frame of
* nearend+echo signal. If noise
* reduction is active, provide the
* clean signal here. Otherwise pass a
* NULL pointer.
* int16_t nrOfSamples Number of samples in nearend buffer
* int16_t msInSndCardBuf Delay estimate for sound card and
* system buffers
*
* Outputs Description
* -------------------------------------------------------------------
* int16_t* out Out buffer, one frame of processed nearend
* int32_t return 0: OK
* 1200-12004,12100: error/warning
*/
int32_t WebRtcAecm_Process(void* aecmInst,
const int16_t* nearendNoisy,
const int16_t* nearendClean,
int16_t* out,
size_t nrOfSamples,
int16_t msInSndCardBuf);
/*
* This function enables the user to set certain parameters on-the-fly
*
* Inputs Description
* -------------------------------------------------------------------
* void* aecmInst Pointer to the AECM instance
* AecmConfig config Config instance that contains all
* properties to be set
*
* Outputs Description
* -------------------------------------------------------------------
* int32_t return 0: OK
* 1200-12004,12100: error/warning
*/
int32_t WebRtcAecm_set_config(void* aecmInst, AecmConfig config);
/*
* This function enables the user to set the echo path on-the-fly.
*
* Inputs Description
* -------------------------------------------------------------------
* void* aecmInst Pointer to the AECM instance
* void* echo_path Pointer to the echo path to be set
* size_t size_bytes Size in bytes of the echo path
*
* Outputs Description
* -------------------------------------------------------------------
* int32_t return 0: OK
* 1200-12004,12100: error/warning
*/
int32_t WebRtcAecm_InitEchoPath(void* aecmInst,
const void* echo_path,
size_t size_bytes);
/*
* This function enables the user to get the currently used echo path
* on-the-fly
*
* Inputs Description
* -------------------------------------------------------------------
* void* aecmInst Pointer to the AECM instance
* void* echo_path Pointer to echo path
* size_t size_bytes Size in bytes of the echo path
*
* Outputs Description
* -------------------------------------------------------------------
* int32_t return 0: OK
* 1200-12004,12100: error/warning
*/
int32_t WebRtcAecm_GetEchoPath(void* aecmInst,
void* echo_path,
size_t size_bytes);
/*
* This function enables the user to get the echo path size in bytes
*
* Outputs Description
* -------------------------------------------------------------------
* size_t return Size in bytes
*/
size_t WebRtcAecm_echo_path_size_bytes();
#ifdef __cplusplus
}
#endif
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_AECM_ECHO_CONTROL_MOBILE_H_
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