1 #ifndef fooresamplerhfoo
2 #define fooresamplerhfoo
7 This file is part of PulseAudio.
9 PulseAudio is free software; you can redistribute it and/or modify
10 it under the terms of the GNU Lesser General Public License as published
11 by the Free Software Foundation; either version 2 of the License,
12 or (at your option) any later version.
14 PulseAudio is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with PulseAudio; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
25 #include <samplerate.h>
27 #include <pulse/sample.h>
28 #include <pulse/channelmap.h>
29 #include <pulsecore/memblock.h>
30 #include <pulsecore/memchunk.h>
32 typedef struct pa_resampler pa_resampler
;
34 typedef enum pa_resample_method
{
35 PA_RESAMPLER_INVALID
= -1,
36 PA_RESAMPLER_SRC_SINC_BEST_QUALITY
= SRC_SINC_BEST_QUALITY
,
37 PA_RESAMPLER_SRC_SINC_MEDIUM_QUALITY
= SRC_SINC_MEDIUM_QUALITY
,
38 PA_RESAMPLER_SRC_SINC_FASTEST
= SRC_SINC_FASTEST
,
39 PA_RESAMPLER_SRC_ZERO_ORDER_HOLD
= SRC_ZERO_ORDER_HOLD
,
40 PA_RESAMPLER_SRC_LINEAR
= SRC_LINEAR
,
43 } pa_resample_method_t
;
45 pa_resampler
* pa_resampler_new(
47 const pa_sample_spec
*a
,
48 const pa_channel_map
*am
,
49 const pa_sample_spec
*b
,
50 const pa_channel_map
*bm
,
51 pa_resample_method_t resample_method
);
53 void pa_resampler_free(pa_resampler
*r
);
55 /* Returns the size of an input memory block which is required to return the specified amount of output data */
56 size_t pa_resampler_request(pa_resampler
*r
, size_t out_length
);
58 /* Pass the specified memory chunk to the resampler and return the newly resampled data */
59 void pa_resampler_run(pa_resampler
*r
, const pa_memchunk
*in
, pa_memchunk
*out
);
61 /* Change the input rate of the resampler object */
62 void pa_resampler_set_input_rate(pa_resampler
*r
, uint32_t rate
);
64 /* Return the resampling method of the resampler object */
65 pa_resample_method_t
pa_resampler_get_method(pa_resampler
*r
);
67 /* Try to parse the resampler method */
68 pa_resample_method_t
pa_parse_resample_method(const char *string
);
70 /* return a human readable string for the specified resampling method. Inverse of pa_parse_resample_method() */
71 const char *pa_resample_method_to_string(pa_resample_method_t m
);