mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-02 09:01:46 -05:00
5f647c8fef
* abstracted resampler API
* add integer-only resampler ("trivial")
* show used resampler wherever useful
* add mixing/volume adjusting for float32ne and u8
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@294 fefdeb5f-60dc-0310-8127-8f9354f1896f
65 lines
2.4 KiB
C
65 lines
2.4 KiB
C
#ifndef fooresamplerhfoo
|
|
#define fooresamplerhfoo
|
|
|
|
/* $Id$ */
|
|
|
|
/***
|
|
This file is part of polypaudio.
|
|
|
|
polypaudio is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published
|
|
by the Free Software Foundation; either version 2 of the License,
|
|
or (at your option) any later version.
|
|
|
|
polypaudio is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with polypaudio; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
|
USA.
|
|
***/
|
|
|
|
#include <samplerate.h>
|
|
|
|
#include "sample.h"
|
|
#include "memblock.h"
|
|
#include "memchunk.h"
|
|
|
|
struct pa_resampler;
|
|
|
|
enum pa_resample_method {
|
|
PA_RESAMPLER_INVALID = -1,
|
|
PA_RESAMPLER_SRC_SINC_BEST_QUALITY = SRC_SINC_BEST_QUALITY,
|
|
PA_RESAMPLER_SRC_SINC_MEDIUM_QUALITY = SRC_SINC_MEDIUM_QUALITY,
|
|
PA_RESAMPLER_SRC_SINC_FASTEST = SRC_SINC_FASTEST,
|
|
PA_RESAMPLER_SRC_ZERO_ORDER_HOLD = SRC_ZERO_ORDER_HOLD,
|
|
PA_RESAMPLER_SRC_LINEAR = SRC_LINEAR,
|
|
PA_RESAMPLER_TRIVIAL,
|
|
PA_RESAMPLER_MAX
|
|
};
|
|
|
|
struct pa_resampler* pa_resampler_new(const struct pa_sample_spec *a, const struct pa_sample_spec *b, struct pa_memblock_stat *s, int resample_method);
|
|
void pa_resampler_free(struct pa_resampler *r);
|
|
|
|
/* Returns the size of an input memory block which is required to return the specified amount of output data */
|
|
size_t pa_resampler_request(struct pa_resampler *r, size_t out_length);
|
|
|
|
/* Pass the specified memory chunk to the resampler and return the newly resampled data */
|
|
void pa_resampler_run(struct pa_resampler *r, const struct pa_memchunk *in, struct pa_memchunk *out);
|
|
|
|
/* Change the input rate of the resampler object */
|
|
void pa_resampler_set_input_rate(struct pa_resampler *r, uint32_t rate);
|
|
|
|
/* Return the resampling method of the resampler object */
|
|
enum pa_resample_method pa_resampler_get_method(struct pa_resampler *r);
|
|
|
|
/* Try to parse the resampler method */
|
|
enum pa_resample_method pa_parse_resample_method(const char *string);
|
|
|
|
/* return a human readable string for the specified resampling method. Inverse of pa_parse_resample_method() */
|
|
const char *pa_resample_method_to_string(enum pa_resample_method m);
|
|
|
|
#endif
|