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echo-cancel: Add alternative echo-cancellation implementation

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This adds Andre Adrian's AEC implementation from his intercom project
(http://andreadrian.de/intercom/) as an alternative to the speex echo
cancellation routines. Since the implementation was in C++ and not in
the form of a library, I have converted the code to C and made a local
copy of the implementation.

The implementation actually works on floating point data, so we can
tweak it to work with both integer and floating point samples (currently
we just use S16LE).
This commit is contained in:
Arun Raghavan 2010-09-07 13:43:58 +05:30
parent c975dfa5a5
commit 47e4dd1ec4
9 changed files with 802 additions and 1 deletions
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14
src/modules/echo-cancel/echo-cancel.h
View file

@ -28,6 +28,7 @@
#include <pulsecore/macro.h>
#include <speex/speex_echo.h>
#include "adrian.h"
/* Common data structures */
@ -39,6 +40,10 @@ struct pa_echo_canceller_params {
uint32_t blocksize;
SpeexEchoState *state;
} speex;
struct {
uint32_t blocksize;
AEC *aec;
} adrian;
/* each canceller-specific structure goes here */
} priv;
};
@ -67,3 +72,12 @@ pa_bool_t pa_speex_ec_init(pa_echo_canceller *ec,
void pa_speex_ec_run(pa_echo_canceller *ec, uint8_t *rec, uint8_t *play, uint8_t *out);
void pa_speex_ec_done(pa_echo_canceller *ec);
uint32_t pa_speex_ec_get_block_size(pa_echo_canceller *ec);
/* Adrian Andre's echo canceller */
pa_bool_t pa_adrian_ec_init(pa_echo_canceller *ec,
pa_sample_spec *source_ss, pa_channel_map *source_map,
pa_sample_spec *sink_ss, pa_channel_map *sink_map,
const char *args);
void pa_adrian_ec_run(pa_echo_canceller *ec, uint8_t *rec, uint8_t *play, uint8_t *out);
void pa_adrian_ec_done(pa_echo_canceller *ec);
uint32_t pa_adrian_ec_get_block_size(pa_echo_canceller *ec);