forked from etc/pineapple-src
85 lines
3 KiB
C
Executable file
85 lines
3 KiB
C
Executable file
/*
|
|
* 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 input_params Used to calculate bytes per frame and buffer size for
|
|
* resampling of the input side of the stream. NULL if input should not be
|
|
* resampled.
|
|
* @param output_params Used to calculate bytes per frame and buffer size for
|
|
* resampling of the output side of the stream. NULL if output should not be
|
|
* resampled.
|
|
* @param target_rate The sampling rate after resampling for the input side of
|
|
* the stream, and/or the sampling rate prior to resampling of the output side
|
|
* of the stream.
|
|
* @param callback A callback to request data 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 * input_params,
|
|
cubeb_stream_params * output_params,
|
|
unsigned int target_rate,
|
|
cubeb_data_callback callback,
|
|
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 input_buffer A buffer of input samples
|
|
* @param input_frame_count The size of the buffer. Returns the number of frames
|
|
* consumed.
|
|
* @param output_buffer The buffer to be filled.
|
|
* @param output_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 * input_buffer,
|
|
long * input_frame_count,
|
|
void * output_buffer,
|
|
long output_frames_needed);
|
|
|
|
/**
|
|
* Destroy a cubeb_resampler.
|
|
* @param resampler A cubeb_resampler instance.
|
|
*/
|
|
void cubeb_resampler_destroy(cubeb_resampler * resampler);
|
|
|
|
/**
|
|
* Returns the latency, in frames, of the resampler.
|
|
* @param resampler A cubeb resampler instance.
|
|
* @retval The latency, in frames, induced by the resampler.
|
|
*/
|
|
long cubeb_resampler_latency(cubeb_resampler * resampler);
|
|
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* CUBEB_RESAMPLER_H */
|