зеркало из https://github.com/mozilla/gecko-dev.git
69 строки
2.4 KiB
C
69 строки
2.4 KiB
C
/*
|
|
* Copyright © 2014 Mozilla Foundation
|
|
*
|
|
* This program is made available under an ISC-style license. See the
|
|
* accompanying file LICENSE for details.
|
|
*/
|
|
#ifndef CUBEB_RESAMPLER_H
|
|
#define CUBEB_RESAMPLER_H
|
|
|
|
#include "cubeb/cubeb.h"
|
|
|
|
#if defined(__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
typedef struct cubeb_resampler cubeb_resampler;
|
|
|
|
typedef enum {
|
|
CUBEB_RESAMPLER_QUALITY_VOIP,
|
|
CUBEB_RESAMPLER_QUALITY_DEFAULT,
|
|
CUBEB_RESAMPLER_QUALITY_DESKTOP
|
|
} cubeb_resampler_quality;
|
|
|
|
/**
|
|
* Create a resampler to adapt the requested sample rate into something that
|
|
* is accepted by the audio backend.
|
|
* @param stream A cubeb_stream instance supplied to the data callback.
|
|
* @param params Used to calculate bytes per frame and buffer size for resampling.
|
|
* @param out_rate The sampling rate after resampling.
|
|
* @param callback A callback to request data for resampling.
|
|
* @param buffer_frame_count Maximum number of frames passed to cubeb_resampler_fill
|
|
* as |frames_needed|. This is also used to calculate
|
|
* the size of buffer allocated for resampling.
|
|
* @param user_ptr User data supplied to the data callback.
|
|
* @param quality Quality of the resampler.
|
|
* @retval A non-null pointer if success.
|
|
*/
|
|
cubeb_resampler * cubeb_resampler_create(cubeb_stream * stream,
|
|
cubeb_stream_params params,
|
|
unsigned int out_rate,
|
|
cubeb_data_callback callback,
|
|
long buffer_frame_count,
|
|
void * user_ptr,
|
|
cubeb_resampler_quality quality);
|
|
|
|
/**
|
|
* Fill the buffer with frames acquired using the data callback. Resampling will
|
|
* happen if necessary.
|
|
* @param resampler A cubeb_resampler instance.
|
|
* @param buffer The buffer to be filled.
|
|
* @param frames_needed Number of frames that should be produced.
|
|
* @retval Number of frames that are actually produced.
|
|
* @retval CUBEB_ERROR on error.
|
|
*/
|
|
long cubeb_resampler_fill(cubeb_resampler * resampler,
|
|
void * buffer, long frames_needed);
|
|
|
|
/**
|
|
* Destroy a cubeb_resampler.
|
|
* @param resampler A cubeb_resampler instance.
|
|
*/
|
|
void cubeb_resampler_destroy(cubeb_resampler * resampler);
|
|
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* CUBEB_RESAMPLER_H */
|