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7dfb166dba
I initially included put the Speex preprocessing assuming that we'd want to use the digital gain control and noise suppression from Speex for all echo cancelling implementations. In practice, we're probably going to get entire implementations all processing in one package (WebRTC, custom modules from various vendors, etc.). This moves out this preprocessing and related knobs into the speex implementation, which serves to clean out all implementation-specific details from the module-echo-cancel core.
89 lines
3.3 KiB
C
89 lines
3.3 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2010 Arun Raghavan <arun.raghavan@collabora.co.uk>
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifndef fooechocancelhfoo
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#define fooechocancelhfoo
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <pulse/sample.h>
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#include <pulse/channelmap.h>
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#include <pulsecore/core.h>
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#include <pulsecore/macro.h>
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#include <speex/speex_echo.h>
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#include <speex/speex_preprocess.h>
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#include "adrian.h"
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/* Common data structures */
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typedef struct pa_echo_canceller_params pa_echo_canceller_params;
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struct pa_echo_canceller_params {
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union {
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struct {
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SpeexEchoState *state;
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SpeexPreprocessState *pp_state;
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} speex;
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struct {
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uint32_t blocksize;
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AEC *aec;
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} adrian;
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/* each canceller-specific structure goes here */
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} priv;
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};
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typedef struct pa_echo_canceller pa_echo_canceller;
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struct pa_echo_canceller {
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pa_bool_t (*init) (pa_core *c,
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pa_echo_canceller *ec,
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pa_sample_spec *source_ss,
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pa_channel_map *source_map,
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pa_sample_spec *sink_ss,
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pa_channel_map *sink_map,
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uint32_t *blocksize,
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const char *args);
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void (*run) (pa_echo_canceller *ec, const uint8_t *rec, const uint8_t *play, uint8_t *out);
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void (*done) (pa_echo_canceller *ec);
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pa_echo_canceller_params params;
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};
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/* Speex canceller functions */
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pa_bool_t pa_speex_ec_init(pa_core *c, pa_echo_canceller *ec,
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pa_sample_spec *source_ss, pa_channel_map *source_map,
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pa_sample_spec *sink_ss, pa_channel_map *sink_map,
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uint32_t *blocksize, const char *args);
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void pa_speex_ec_run(pa_echo_canceller *ec, const uint8_t *rec, const uint8_t *play, uint8_t *out);
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void pa_speex_ec_done(pa_echo_canceller *ec);
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/* Adrian Andre's echo canceller */
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pa_bool_t pa_adrian_ec_init(pa_core *c, pa_echo_canceller *ec,
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pa_sample_spec *source_ss, pa_channel_map *source_map,
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pa_sample_spec *sink_ss, pa_channel_map *sink_map,
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uint32_t *blocksize, const char *args);
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void pa_adrian_ec_run(pa_echo_canceller *ec, const uint8_t *rec, const uint8_t *play, uint8_t *out);
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void pa_adrian_ec_done(pa_echo_canceller *ec);
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#endif /* fooechocancelhfoo */
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