From: Peter Meerwald <p.meerwald@xxxxxxxxxxxxxxxxxx>
I find a dummy/passthrough implementation useful for AEC debugging
Signed-off-by: Peter Meerwald <p.meerwald at bct-electronic.com>
---
src/Makefile.am | 4 ++-
src/modules/echo-cancel/echo-cancel.h | 8 ++++
src/modules/echo-cancel/module-echo-cancel.c | 9 +++++
src/modules/echo-cancel/null.c | 50 ++++++++++++++++++++++++++
4 files changed, 70 insertions(+), 1 deletions(-)
create mode 100644 src/modules/echo-cancel/null.c
diff --git a/src/Makefile.am b/src/Makefile.am
index 0445445..c7507cd 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1818,7 +1818,9 @@ module_suspend_on_idle_la_CFLAGS = $(AM_CFLAGS)
# echo-cancel module
module_echo_cancel_la_SOURCES = \
- modules/echo-cancel/module-echo-cancel.c modules/echo-cancel/echo-cancel.h
+ modules/echo-cancel/module-echo-cancel.c \
+ modules/echo-cancel/null.c \
+ modules/echo-cancel/echo-cancel.h
module_echo_cancel_la_LDFLAGS = $(MODULE_LDFLAGS)
module_echo_cancel_la_LIBADD = $(MODULE_LIBADD) $(LIBSPEEX_LIBS)
module_echo_cancel_la_CFLAGS = $(AM_CFLAGS) $(SERVER_CFLAGS) $(LIBSPEEX_CFLAGS)
diff --git a/src/modules/echo-cancel/echo-cancel.h b/src/modules/echo-cancel/echo-cancel.h
index 870d163..9ca78ff 100644
--- a/src/modules/echo-cancel/echo-cancel.h
+++ b/src/modules/echo-cancel/echo-cancel.h
@@ -128,6 +128,14 @@ struct pa_echo_canceller {
void pa_echo_canceller_get_capture_volume(pa_echo_canceller *ec, pa_cvolume *v);
void pa_echo_canceller_set_capture_volume(pa_echo_canceller *ec, pa_cvolume *v);
+/* Null canceller functions */
+pa_bool_t pa_null_ec_init(pa_core *c, pa_echo_canceller *ec,
+ pa_sample_spec *source_ss, pa_channel_map *source_map,
+ pa_sample_spec *sink_ss, pa_channel_map *sink_map,
+ uint32_t *blocksize, const char *args);
+void pa_null_ec_run(pa_echo_canceller *ec, const uint8_t *rec, const uint8_t *play, uint8_t *out);
+void pa_null_ec_done(pa_echo_canceller *ec);
+
#ifdef HAVE_SPEEX
/* Speex canceller functions */
pa_bool_t pa_speex_ec_init(pa_core *c, pa_echo_canceller *ec,
diff --git a/src/modules/echo-cancel/module-echo-cancel.c b/src/modules/echo-cancel/module-echo-cancel.c
index 510ea4f..d8cc370 100644
--- a/src/modules/echo-cancel/module-echo-cancel.c
+++ b/src/modules/echo-cancel/module-echo-cancel.c
@@ -82,6 +82,7 @@ PA_MODULE_USAGE(
/* NOTE: Make sure the enum and ec_table are maintained in the correct order */
typedef enum {
PA_ECHO_CANCELLER_INVALID = -1,
+ PA_ECHO_CANCELLER_NULL,
#ifdef HAVE_SPEEX
PA_ECHO_CANCELLER_SPEEX,
#endif
@@ -100,6 +101,12 @@ typedef enum {
#endif
static const pa_echo_canceller ec_table[] = {
+ {
+ /* Null, Dummy echo canceller (just copies data) */
+ .init = pa_null_ec_init,
+ .run = pa_null_ec_run,
+ .done = pa_null_ec_done,
+ },
#ifdef HAVE_SPEEX
{
/* Speex */
@@ -1553,6 +1560,8 @@ void pa_echo_canceller_set_capture_volume(pa_echo_canceller *ec, pa_cvolume *v)
}
static pa_echo_canceller_method_t get_ec_method_from_string(const char *method) {
+ if (pa_streq(method, "null"))
+ return PA_ECHO_CANCELLER_NULL;
#ifdef HAVE_SPEEX
if (pa_streq(method, "speex"))
return PA_ECHO_CANCELLER_SPEEX;
diff --git a/src/modules/echo-cancel/null.c b/src/modules/echo-cancel/null.c
new file mode 100644
index 0000000..bcdd3a6
--- /dev/null
+++ b/src/modules/echo-cancel/null.c
@@ -0,0 +1,50 @@
+/***
+ Copyright 2012 Peter Meerwald <p.meerwald at 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
+
+pa_bool_t pa_null_ec_init(pa_core *c, pa_echo_canceller *ec,
+ pa_sample_spec *source_ss, pa_channel_map *source_map,
+ pa_sample_spec *sink_ss, pa_channel_map *sink_map,
+ uint32_t *blocksize, const char *args) {
+ unsigned framelen = 256;
+
+ source_ss->format = PA_SAMPLE_S16NE;
+ *sink_ss = *source_ss;
+ *sink_map = *source_map;
+
+ *blocksize = framelen * pa_frame_size(source_ss);
+
+ pa_log_debug("null AEC: framelen %u, blocksize %u, channels %d, rate %d", framelen, *blocksize, source_ss->channels, source_ss->rate);
+
+ return TRUE;
+}
+
+void pa_null_ec_run(pa_echo_canceller *ec, const uint8_t *rec, const uint8_t *play, uint8_t *out) {
+ memcpy(out, rec, 256 * 2);
+}
+
+void pa_null_ec_done(pa_echo_canceller *ec) {
+}
--
1.7.5.4
