1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
/***
Copyright 2012 Peter Meerwald <p.meerwald@bct-electronic.com>
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 2.1 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.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <pulse/cdecl.h>
PA_C_DECL_BEGIN
#include <pulsecore/core-util.h>
#include <pulsecore/modargs.h>
#include "echo-cancel.h"
PA_C_DECL_END
bool pa_null_ec_init(pa_core *c, pa_echo_canceller *ec,
pa_sample_spec *rec_ss, pa_channel_map *rec_map,
pa_sample_spec *play_ss, pa_channel_map *play_map,
pa_sample_spec *out_ss, pa_channel_map *out_map,
uint32_t *nframes, const char *args) {
char strss_source[PA_SAMPLE_SPEC_SNPRINT_MAX];
char strss_sink[PA_SAMPLE_SPEC_SNPRINT_MAX];
*nframes = 256;
ec->params.null.out_ss = *out_ss;
*rec_ss = *out_ss;
*rec_map = *out_map;
pa_log_debug("null AEC: nframes=%u, sample spec source=%s, sample spec sink=%s", *nframes,
pa_sample_spec_snprint(strss_source, sizeof(strss_source), out_ss),
pa_sample_spec_snprint(strss_sink, sizeof(strss_sink), play_ss));
return true;
}
void pa_null_ec_run(pa_echo_canceller *ec, const uint8_t *rec, const uint8_t *play, uint8_t *out) {
/* The null implementation simply copies the recorded buffer to the output
buffer and ignores the play buffer. */
memcpy(out, rec, 256 * pa_frame_size(&ec->params.null.out_ss));
}
void pa_null_ec_done(pa_echo_canceller *ec) {
}
|
