mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2026-05-21 16:38:10 +02:00
0e436a6926
is to allocate all audio memory blocks from a per-process memory pool which is available as read-only SHM segment to other local processes. Then, instead of writing the actual audio data to the socket just write references to this shared memory pool. To work optimally all memory blocks should now be of type PA_MEMBLOCK_POOL or PA_MEMBLOCK_POOL_EXTERNAL. The function pa_memblock_new() now generates memory blocks of this type by default. git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1266 fefdeb5f-60dc-0310-8127-8f9354f1896f
73 lines
2.6 KiB
C
73 lines
2.6 KiB
C
#ifndef fooresamplerhfoo
|
|
#define fooresamplerhfoo
|
|
|
|
/* $Id$ */
|
|
|
|
/***
|
|
This file is part of PulseAudio.
|
|
|
|
PulseAudio 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.
|
|
|
|
PulseAudio 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 PulseAudio; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
|
USA.
|
|
***/
|
|
|
|
#include <samplerate.h>
|
|
|
|
#include <pulse/sample.h>
|
|
#include <pulse/channelmap.h>
|
|
#include <pulsecore/memblock.h>
|
|
#include <pulsecore/memchunk.h>
|
|
|
|
typedef struct pa_resampler pa_resampler;
|
|
|
|
typedef 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
|
|
} pa_resample_method_t;
|
|
|
|
pa_resampler* pa_resampler_new(
|
|
pa_mempool *pool,
|
|
const pa_sample_spec *a,
|
|
const pa_channel_map *am,
|
|
const pa_sample_spec *b,
|
|
const pa_channel_map *bm,
|
|
pa_resample_method_t resample_method);
|
|
|
|
void pa_resampler_free(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(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(pa_resampler *r, const pa_memchunk *in, pa_memchunk *out);
|
|
|
|
/* Change the input rate of the resampler object */
|
|
void pa_resampler_set_input_rate(pa_resampler *r, uint32_t rate);
|
|
|
|
/* Return the resampling method of the resampler object */
|
|
pa_resample_method_t pa_resampler_get_method(pa_resampler *r);
|
|
|
|
/* Try to parse the resampler method */
|
|
pa_resample_method_t 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(pa_resample_method_t m);
|
|
|
|
#endif
|