--- /dev/null
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2010 Wim Taymans <wim.taymans@gmail.com>
+
+ Based on module-virtual-sink.c
+ module-virtual-source.c
+ module-loopback.c
+
+ Copyright 2010 Intel Corporation
+ Contributor: Pierre-Louis Bossart <pierre-louis.bossart@intel.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.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with PulseAudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <math.h>
+
+#include <speex/speex_echo.h>
+
+#include <pulse/xmalloc.h>
+#include <pulse/i18n.h>
+#include <pulse/timeval.h>
+#include <pulse/rtclock.h>
+
+#include <pulsecore/atomic.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/core-error.h>
+#include <pulsecore/namereg.h>
+#include <pulsecore/sink.h>
+#include <pulsecore/module.h>
+#include <pulsecore/core-rtclock.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/core-error.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/log.h>
+#include <pulsecore/thread.h>
+#include <pulsecore/thread-mq.h>
+#include <pulsecore/rtpoll.h>
+#include <pulsecore/sample-util.h>
+#include <pulsecore/ltdl-helper.h>
+
+#include "module-echo-cancel-symdef.h"
+
+PA_MODULE_AUTHOR("Wim Taymans");
+PA_MODULE_DESCRIPTION("Echo Cancelation");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(FALSE);
+PA_MODULE_USAGE(
+ _("source_name=<name for the source> "
+ "source_properties=<properties for the source> "
+ "source_master=<name of source to filter> "
+ "sink_name=<name for the sink> "
+ "sink_properties=<properties for the sink> "
+ "sink_master=<name of sink to filter> "
+ "frame_size_ms=<amount of data to process at one time> "
+ "filter_size_ms=<amount of echo to cancel> "
+ "adjust_time=<how often to readjust rates in s> "
+ "format=<sample format> "
+ "rate=<sample rate> "
+ "channels=<number of channels> "
+ "channel_map=<channel map> "
+ "save_aec=<save AEC data in /tmp> "
+ ));
+
+/* should be between 10-20 ms */
+#define DEFAULT_FRAME_SIZE_MS 20
+/* should be between 100-500 ms */
+#define DEFAULT_FILTER_SIZE_MS 200
+
+#define DEFAULT_ADJUST_TIME_USEC (1*PA_USEC_PER_SEC)
+#define DEFAULT_SAVE_AEC 0
+
+#define MEMBLOCKQ_MAXLENGTH (16*1024*1024)
+
+/* This module creates a new (virtual) source and sink.
+ *
+ * The data sent to the new sink is kept in a memblockq before being
+ * forwarded to the real sink_master.
+ *
+ * Data read from source_master is matched against the saved sink data and
+ * echo canceled data is then pushed onto the new source.
+ *
+ * Both source and sink masters have their own threads to push/pull data
+ * respectively. We however perform all our actions in the source IO thread.
+ * To do this we send all played samples to the source IO thread where they
+ * are then pushed into the memblockq.
+ *
+ * Alignment is performed in two steps:
+ *
+ * 1) when something happens that requires quick adjustement of the alignment of
+ * capture and playback samples, we perform a resync. This adjusts the
+ * position in the playback memblock to the requested sample. Quick
+ * adjustements include moving the playback samples before the capture
+ * samples (because else the echo canceler does not work) or when the
+ * playback pointer drifts too far away.
+ *
+ * 2) periodically check the difference between capture and playback. we use a
+ * low and high watermark for adjusting the alignment. playback should always
+ * be before capture and the difference should not be bigger than one frame
+ * size. We would ideally like to resample the sink_input but most driver
+ * don't give enough accuracy to be able to do that right now.
+ */
+
+struct snapshot {
+ pa_usec_t sink_latency;
+ size_t sink_delay;
+ int64_t send_counter;
+
+ pa_usec_t source_latency;
+ size_t source_delay;
+ int64_t recv_counter;
+ size_t rlen;
+ size_t plen;
+};
+
+struct userdata {
+ pa_core *core;
+ pa_module *module;
+
+ uint32_t frame_size_ms;
+ uint32_t save_aec;
+
+ SpeexEchoState *echo_state;
+
+ size_t blocksize;
+ pa_bool_t need_realign;
+
+ /* to wakeup the source I/O thread */
+ pa_bool_t in_push;
+ pa_asyncmsgq *asyncmsgq;
+ pa_rtpoll_item *rtpoll_item_read, *rtpoll_item_write;
+
+ pa_source *source;
+ pa_bool_t source_auto_desc;
+ pa_source_output *source_output;
+ pa_memblockq *source_memblockq; /* echo canceler needs fixed sized chunks */
+ pa_atomic_t source_active;
+
+ pa_sink *sink;
+ pa_bool_t sink_auto_desc;
+ pa_sink_input *sink_input;
+ pa_memblockq *sink_memblockq;
+ int64_t send_counter; /* updated in sink IO thread */
+ int64_t recv_counter;
+ pa_atomic_t sink_active;
+
+ pa_atomic_t request_resync;
+
+ pa_time_event *time_event;
+ pa_usec_t adjust_time;
+
+ FILE *captured_file;
+ FILE *played_file;
+ FILE *canceled_file;
+};
+
+static void source_output_snapshot_within_thread(struct userdata *u, struct snapshot *snapshot);
+
+static const char* const valid_modargs[] = {
+ "source_name",
+ "source_properties",
+ "source_master",
+ "sink_name",
+ "sink_properties",
+ "sink_master",
+ "frame_size_ms",
+ "filter_size_ms",
+ "adjust_time",
+ "format",
+ "rate",
+ "channels",
+ "channel_map",
+ "save_aec",
+ NULL
+};
+
+enum {
+ SOURCE_OUTPUT_MESSAGE_POST = PA_SOURCE_OUTPUT_MESSAGE_MAX,
+ SOURCE_OUTPUT_MESSAGE_REWIND,
+ SOURCE_OUTPUT_MESSAGE_LATENCY_SNAPSHOT,
+ SOURCE_OUTPUT_MESSAGE_APPLY_DIFF_TIME
+};
+
+enum {
+ SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT
+};
+
+static int64_t calc_diff(struct userdata *u, struct snapshot *snapshot) {
+ int64_t buffer, diff_time, buffer_latency;
+
+ /* get the number of samples between capture and playback */
+ if (snapshot->plen > snapshot->rlen)
+ buffer = snapshot->plen - snapshot->rlen;
+ else
+ buffer = 0;
+
+ buffer += snapshot->source_delay + snapshot->sink_delay;
+
+ /* add the amount of samples not yet transfered to the source context */
+ if (snapshot->recv_counter <= snapshot->send_counter)
+ buffer += (int64_t) (snapshot->send_counter - snapshot->recv_counter);
+ else
+ buffer += PA_CLIP_SUB(buffer, (int64_t) (snapshot->recv_counter - snapshot->send_counter));
+
+ /* convert to time */
+ buffer_latency = pa_bytes_to_usec(buffer, &u->source_output->sample_spec);
+
+ /* capture and playback samples are perfectly aligned when diff_time is 0 */
+ diff_time = (snapshot->sink_latency - buffer_latency) + snapshot->source_latency;
+
+ pa_log_debug("diff %lld (%lld - %lld + %lld) %lld %lld %lld", (long long) diff_time,
+ (long long) snapshot->sink_latency,
+ (long long) buffer_latency, (long long) snapshot->source_latency,
+ (long long) snapshot->source_delay, (long long) snapshot->sink_delay,
+ (long long) (snapshot->send_counter - snapshot->recv_counter));
+
+ return diff_time;
+}
+
+/* Called from main context */
+static void time_callback(pa_mainloop_api *a, pa_time_event *e, const struct timeval *t, void *userdata) {
+ struct userdata *u = userdata;
+ uint32_t old_rate, base_rate, new_rate;
+ int64_t diff_time;
+ size_t fs;
+ struct snapshot latency_snapshot;
+
+ pa_assert(u);
+ pa_assert(a);
+ pa_assert(u->time_event == e);
+ pa_assert_ctl_context();
+
+ if (pa_atomic_load (&u->sink_active) == 0 || pa_atomic_load (&u->source_active) == 0)
+ goto done;
+
+ /* update our snapshots */
+ pa_asyncmsgq_send(u->source_output->source->asyncmsgq, PA_MSGOBJECT(u->source_output), SOURCE_OUTPUT_MESSAGE_LATENCY_SNAPSHOT, &latency_snapshot, 0, NULL);
+ pa_asyncmsgq_send(u->sink_input->sink->asyncmsgq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT, &latency_snapshot, 0, NULL);
+
+ /* calculate drift between capture and playback */
+ diff_time = calc_diff(u, &latency_snapshot);
+
+ fs = pa_frame_size(&u->source_output->sample_spec);
+ old_rate = u->sink_input->sample_spec.rate;
+ base_rate = u->source_output->sample_spec.rate;
+
+ if (diff_time < 0) {
+ pa_log_info("Playback after capture (%lld), realign", (long long) diff_time);
+ pa_asyncmsgq_post(u->asyncmsgq, PA_MSGOBJECT(u->source_output), SOURCE_OUTPUT_MESSAGE_APPLY_DIFF_TIME,
+ NULL, diff_time, NULL, NULL);
+ /* recording before playback, we need to adjust quickly. The echo
+ * canceler does not work in this case. */
+ //new_rate = base_rate - ((pa_usec_to_bytes (-diff_time, &u->source_output->sample_spec) / fs) * PA_USEC_PER_SEC) / u->adjust_time;
+ new_rate = base_rate;
+ }
+ else {
+ if (diff_time > (u->frame_size_ms / 2) * 1000) {
+ pa_log_info("playback too far ahead (%lld), realign", (long long) diff_time);
+ /* diff too big, quickly adjust */
+ pa_asyncmsgq_post(u->asyncmsgq, PA_MSGOBJECT(u->source_output), SOURCE_OUTPUT_MESSAGE_APPLY_DIFF_TIME,
+ NULL, diff_time, NULL, NULL);
+ }
+
+ /* recording behind playback, we need to slowly adjust the rate to match */
+ //new_rate = base_rate + ((pa_usec_to_bytes (diff_time, &u->source_output->sample_spec) / fs) * PA_USEC_PER_SEC) / u->adjust_time;
+
+ /* assume equal samplerates for now */
+ new_rate = base_rate;
+ }
+
+ /* make sure we don't make too big adjustements because that sounds horrible */
+ if (new_rate > base_rate * 1.1 || new_rate < base_rate * 0.9)
+ new_rate = base_rate;
+
+ if (new_rate != old_rate) {
+ pa_log_info("Old rate %lu Hz, new rate %lu Hz", (unsigned long) old_rate, (unsigned long) new_rate);
+
+ pa_sink_input_set_rate(u->sink_input, new_rate);
+ }
+
+done:
+ pa_core_rttime_restart(u->core, u->time_event, pa_rtclock_now() + u->adjust_time);
+}
+
+/* Called from source I/O thread context */
+static int source_process_msg_cb(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
+ struct userdata *u = PA_SOURCE(o)->userdata;
+
+ switch (code) {
+
+ case PA_SOURCE_MESSAGE_GET_LATENCY:
+
+ /* The source is _put() before the source output is, so let's
+ * make sure we don't access it in that time. Also, the
+ * source output is first shut down, the source second. */
+ if (!PA_SOURCE_IS_LINKED(u->source->thread_info.state) ||
+ !PA_SOURCE_OUTPUT_IS_LINKED(u->source_output->thread_info.state)) {
+ *((pa_usec_t*) data) = 0;
+ return 0;
+ }
+
+ *((pa_usec_t*) data) =
+
+ /* Get the latency of the master source */
+ pa_source_get_latency_within_thread(u->source_output->source) +
+ /* Add the latency internal to our source output on top */
+ pa_bytes_to_usec(pa_memblockq_get_length(u->source_output->thread_info.delay_memblockq), &u->source_output->source->sample_spec) +
+ /* and the buffering we do on the source */
+ pa_bytes_to_usec(u->blocksize, &u->source_output->source->sample_spec);
+
+ return 0;
+
+ }
+
+ return pa_source_process_msg(o, code, data, offset, chunk);
+}
+
+/* Called from sink I/O thread context */
+static int sink_process_msg_cb(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
+ struct userdata *u = PA_SINK(o)->userdata;
+
+ switch (code) {
+
+ case PA_SINK_MESSAGE_GET_LATENCY:
+
+ /* The sink is _put() before the sink input is, so let's
+ * make sure we don't access it in that time. Also, the
+ * sink input is first shut down, the sink second. */
+ if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) ||
+ !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state)) {
+ *((pa_usec_t*) data) = 0;
+ return 0;
+ }
+
+ *((pa_usec_t*) data) =
+
+ /* Get the latency of the master sink */
+ pa_sink_get_latency_within_thread(u->sink_input->sink) +
+
+ /* Add the latency internal to our sink input on top */
+ pa_bytes_to_usec(pa_memblockq_get_length(u->sink_input->thread_info.render_memblockq), &u->sink_input->sink->sample_spec);
+
+ return 0;
+ }
+
+ return pa_sink_process_msg(o, code, data, offset, chunk);
+}
+
+
+/* Called from main context */
+static int source_set_state_cb(pa_source *s, pa_source_state_t state) {
+ struct userdata *u;
+
+ pa_source_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ if (!PA_SOURCE_IS_LINKED(state) ||
+ !PA_SOURCE_OUTPUT_IS_LINKED(pa_source_output_get_state(u->source_output)))
+ return 0;
+
+ pa_log_debug("Source state %d", state);
+
+ if (state == PA_SOURCE_RUNNING) {
+ pa_atomic_store (&u->source_active, 1);
+ pa_atomic_store (&u->request_resync, 1);
+ pa_source_output_cork(u->source_output, FALSE);
+ } else if (state == PA_SOURCE_SUSPENDED) {
+ pa_atomic_store (&u->source_active, 0);
+ pa_source_output_cork(u->source_output, TRUE);
+ }
+ return 0;
+}
+
+/* Called from main context */
+static int sink_set_state_cb(pa_sink *s, pa_sink_state_t state) {
+ struct userdata *u;
+
+ pa_sink_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ if (!PA_SINK_IS_LINKED(state) ||
+ !PA_SINK_INPUT_IS_LINKED(pa_sink_input_get_state(u->sink_input)))
+ return 0;
+
+ pa_log_debug("Sink state %d", state);
+
+ if (state == PA_SINK_RUNNING) {
+ pa_atomic_store (&u->sink_active, 1);
+ pa_atomic_store (&u->request_resync, 1);
+ pa_sink_input_cork(u->sink_input, FALSE);
+ } else if (state == PA_SINK_SUSPENDED) {
+ pa_atomic_store (&u->sink_active, 0);
+ pa_sink_input_cork(u->sink_input, TRUE);
+ }
+ return 0;
+}
+
+/* Called from I/O thread context */
+static void source_update_requested_latency_cb(pa_source *s) {
+ struct userdata *u;
+
+ pa_source_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ if (!PA_SOURCE_IS_LINKED(u->source->thread_info.state) ||
+ !PA_SOURCE_OUTPUT_IS_LINKED(u->source_output->thread_info.state))
+ return;
+
+ pa_log_debug("Source update requested latency");
+
+ /* Just hand this one over to the master source */
+ pa_source_output_set_requested_latency_within_thread(
+ u->source_output,
+ pa_source_get_requested_latency_within_thread(s));
+}
+
+/* Called from I/O thread context */
+static void sink_update_requested_latency_cb(pa_sink *s) {
+ struct userdata *u;
+
+ pa_sink_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) ||
+ !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state))
+ return;
+
+ pa_log_debug("Sink update requested latency");
+
+ /* Just hand this one over to the master sink */
+ pa_sink_input_set_requested_latency_within_thread(
+ u->sink_input,
+ pa_sink_get_requested_latency_within_thread(s));
+}
+
+/* Called from I/O thread context */
+static void sink_request_rewind_cb(pa_sink *s) {
+ struct userdata *u;
+
+ pa_sink_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) ||
+ !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state))
+ return;
+
+ pa_log_debug("Sink request rewind %lld", (long long) s->thread_info.rewind_nbytes);
+
+ /* Just hand this one over to the master sink */
+ pa_sink_input_request_rewind(u->sink_input,
+ s->thread_info.rewind_nbytes, TRUE, FALSE, FALSE);
+}
+
+/* Called from main context */
+static void source_set_volume_cb(pa_source *s) {
+ struct userdata *u;
+
+ pa_source_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ if (!PA_SOURCE_IS_LINKED(pa_source_get_state(s)) ||
+ !PA_SOURCE_OUTPUT_IS_LINKED(pa_source_output_get_state(u->source_output)))
+ return;
+
+ /* FIXME, no volume control in source_output, set volume at the master */
+ pa_source_set_volume(u->source_output->source, &s->volume, TRUE);
+}
+
+/* Called from main context */
+static void sink_set_volume_cb(pa_sink *s) {
+ struct userdata *u;
+
+ pa_sink_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ if (!PA_SINK_IS_LINKED(pa_sink_get_state(s)) ||
+ !PA_SINK_INPUT_IS_LINKED(pa_sink_input_get_state(u->sink_input)))
+ return;
+
+ pa_sink_input_set_volume(u->sink_input, &s->real_volume, s->save_volume, TRUE);
+}
+
+static void source_get_volume_cb(pa_source *s) {
+ struct userdata *u;
+
+ pa_source_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ if (!PA_SOURCE_IS_LINKED(pa_source_get_state(s)) ||
+ !PA_SOURCE_OUTPUT_IS_LINKED(pa_source_output_get_state(u->source_output)))
+ return;
+
+ /* FIXME, no volume control in source_output, get the info from the master */
+ pa_source_get_volume(u->source_output->source, TRUE);
+
+ if (pa_cvolume_equal(&s->volume,&u->source_output->source->volume))
+ /* no change */
+ return;
+
+ s->volume = u->source_output->source->volume;
+ pa_source_set_soft_volume(s, NULL);
+}
+
+
+/* Called from main context */
+static void source_set_mute_cb(pa_source *s) {
+ struct userdata *u;
+
+ pa_source_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ if (!PA_SOURCE_IS_LINKED(pa_source_get_state(s)) ||
+ !PA_SOURCE_OUTPUT_IS_LINKED(pa_source_output_get_state(u->source_output)))
+ return;
+
+ /* FIXME, no volume control in source_output, set mute at the master */
+ pa_source_set_mute(u->source_output->source, TRUE, TRUE);
+}
+
+/* Called from main context */
+static void sink_set_mute_cb(pa_sink *s) {
+ struct userdata *u;
+
+ pa_sink_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ if (!PA_SINK_IS_LINKED(pa_sink_get_state(s)) ||
+ !PA_SINK_INPUT_IS_LINKED(pa_sink_input_get_state(u->sink_input)))
+ return;
+
+ pa_sink_input_set_mute(u->sink_input, s->muted, s->save_muted);
+}
+
+/* Called from main context */
+static void source_get_mute_cb(pa_source *s) {
+ struct userdata *u;
+
+ pa_source_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ if (!PA_SOURCE_IS_LINKED(pa_source_get_state(s)) ||
+ !PA_SOURCE_OUTPUT_IS_LINKED(pa_source_output_get_state(u->source_output)))
+ return;
+
+ /* FIXME, no volume control in source_output, get the info from the master */
+ pa_source_get_mute(u->source_output->source, TRUE);
+}
+
+/* must be called from the input thread context */
+static void apply_diff_time(struct userdata *u, int64_t diff_time) {
+ int64_t diff;
+
+ if (diff_time < 0) {
+ diff = pa_usec_to_bytes (-diff_time, &u->source_output->sample_spec);
+
+ pa_log_debug("drop sink (%lld)", (long long) diff);
+
+ /* go forwards on the read side */
+ pa_memblockq_drop(u->sink_memblockq, diff);
+ } else {
+ diff = pa_usec_to_bytes (diff_time, &u->source_output->sample_spec);
+
+ pa_log_debug("drop source (%lld)", (long long) diff);
+
+ /* go back on the read side */
+ pa_memblockq_rewind(u->sink_memblockq, diff);
+ }
+}
+
+/* must be called from the input thread */
+static void do_resync(struct userdata *u) {
+ int64_t diff_time;
+ struct snapshot latency_snapshot;
+
+ pa_log("Doing resync");
+
+ /* update our snapshot */
+ source_output_snapshot_within_thread(u, &latency_snapshot);
+ pa_asyncmsgq_send(u->sink_input->sink->asyncmsgq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT, &latency_snapshot, 0, NULL);
+
+ /* calculate drift between capture and playback */
+ diff_time = calc_diff(u, &latency_snapshot);
+
+ /* and adjust for the drift */
+ apply_diff_time(u, diff_time);
+}
+
+/* Called from input thread context */
+static void source_output_push_cb(pa_source_output *o, const pa_memchunk *chunk) {
+ struct userdata *u;
+ size_t rlen, plen;
+
+ pa_source_output_assert_ref(o);
+ pa_source_output_assert_io_context(o);
+ pa_assert_se(u = o->userdata);
+
+ if (!PA_SOURCE_OUTPUT_IS_LINKED(pa_source_output_get_state(u->source_output))) {
+ pa_log("push when no link?");
+ return;
+ }
+
+ /* handle queued messages */
+ u->in_push = TRUE;
+ while (pa_asyncmsgq_process_one(u->asyncmsgq) > 0)
+ ;
+ u->in_push = FALSE;
+
+ if (pa_atomic_load (&u->request_resync) == 1) {
+ do_resync (u);
+ pa_atomic_store (&u->request_resync, 0);
+ }
+
+ pa_memblockq_push_align(u->source_memblockq, chunk);
+
+ rlen = pa_memblockq_get_length(u->source_memblockq);
+ plen = pa_memblockq_get_length(u->sink_memblockq);
+
+ while (rlen >= u->blocksize) {
+ pa_memchunk rchunk, pchunk;
+
+ /* take fixed block from recorded samples */
+ pa_memblockq_peek_fixed_size(u->source_memblockq, u->blocksize, &rchunk);
+
+ if (plen > u->blocksize) {
+ uint8_t *rdata, *pdata, *cdata;
+ pa_memchunk cchunk;
+
+ /* take fixed block from played samples */
+ pa_memblockq_peek_fixed_size(u->sink_memblockq, u->blocksize, &pchunk);
+
+ rdata = pa_memblock_acquire(rchunk.memblock);
+ rdata += rchunk.index;
+ pdata = pa_memblock_acquire(pchunk.memblock);
+ pdata += pchunk.index;
+
+ cchunk.index = 0;
+ cchunk.length = u->blocksize;
+ cchunk.memblock = pa_memblock_new(u->source->core->mempool, cchunk.length);
+ cdata = pa_memblock_acquire(cchunk.memblock);
+
+ /* perform echo cancelation */
+ speex_echo_cancellation(u->echo_state, (const spx_int16_t *) rdata,
+ (const spx_int16_t *) pdata, (spx_int16_t *) cdata);
+
+ if (u->save_aec) {
+ if (u->captured_file)
+ fwrite(rdata, 1, u->blocksize, u->captured_file);
+ if (u->played_file)
+ fwrite(pdata, 1, u->blocksize, u->played_file);
+ if (u->canceled_file)
+ fwrite(cdata, 1, u->blocksize, u->canceled_file);
+ pa_log_debug("AEC frame saved.");
+ }
+
+ pa_memblock_release(cchunk.memblock);
+ pa_memblock_release(pchunk.memblock);
+ pa_memblock_release(rchunk.memblock);
+
+ /* drop consumed sink samples */
+ pa_memblockq_drop(u->sink_memblockq, u->blocksize);
+ pa_memblock_unref(pchunk.memblock);
+
+ pa_memblock_unref(rchunk.memblock);
+ /* the filtered samples now become the samples from our
+ * source */
+ rchunk = cchunk;
+
+ plen -= u->blocksize;
+ } else {
+ /* not enough played samples to perform echo cancelation,
+ * drop what we have */
+ pa_memblockq_drop(u->sink_memblockq, u->blocksize - plen);
+ plen = 0;
+ }
+
+ /* forward the (echo-canceled) data to the virtual source */
+ pa_source_post(u->source, &rchunk);
+ pa_memblock_unref(rchunk.memblock);
+
+ pa_memblockq_drop(u->source_memblockq, u->blocksize);
+
+ rlen -= u->blocksize;
+ }
+}
+
+/* Called from I/O thread context */
+static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
+ struct userdata *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert(chunk);
+ pa_assert_se(u = i->userdata);
+
+ if (u->sink->thread_info.rewind_requested)
+ pa_sink_process_rewind(u->sink, 0);
+
+ pa_sink_render_full(u->sink, nbytes, chunk);
+
+ if (i->thread_info.underrun_for > 0) {
+ pa_log_debug("Handling end of underrun.");
+ pa_atomic_store (&u->request_resync, 1);
+ }
+
+ /* let source thread handle the chunk. pass the sample count as well so that
+ * the source IO thread can update the right variables. */
+ pa_asyncmsgq_post(u->asyncmsgq, PA_MSGOBJECT(u->source_output), SOURCE_OUTPUT_MESSAGE_POST,
+ NULL, 0, chunk, NULL);
+ u->send_counter += chunk->length;
+
+ return 0;
+}
+
+/* Called from input thread context */
+static void source_output_process_rewind_cb(pa_source_output *o, size_t nbytes) {
+ struct userdata *u;
+
+ pa_source_output_assert_ref(o);
+ pa_source_output_assert_io_context(o);
+ pa_assert_se(u = o->userdata);
+
+ pa_source_process_rewind(u->source, nbytes);
+
+ /* go back on read side, we need to use older sink data for this */
+ pa_memblockq_rewind(u->sink_memblockq, nbytes);
+
+ /* manipulate write index */
+ pa_memblockq_seek(u->source_memblockq, -nbytes, PA_SEEK_RELATIVE, TRUE);
+
+ pa_log_debug("Source rewind (%lld) %lld", (long long) nbytes,
+ (long long) pa_memblockq_get_length (u->source_memblockq));
+}
+
+/* Called from I/O thread context */
+static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
+ struct userdata *u;
+ size_t amount = 0;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ pa_log_debug("Sink process rewind %lld", (long long) nbytes);
+
+ if (u->sink->thread_info.rewind_nbytes > 0) {
+ amount = PA_MIN(u->sink->thread_info.rewind_nbytes, nbytes);
+ u->sink->thread_info.rewind_nbytes = 0;
+ }
+
+ pa_sink_process_rewind(u->sink, amount);
+
+ pa_asyncmsgq_post(u->asyncmsgq, PA_MSGOBJECT(u->source_output), SOURCE_OUTPUT_MESSAGE_REWIND, NULL, (int64_t) nbytes, NULL, NULL);
+ u->send_counter -= nbytes;
+}
+
+static void source_output_snapshot_within_thread(struct userdata *u, struct snapshot *snapshot) {
+ size_t delay, rlen, plen;
+ pa_usec_t latency;
+
+ latency = pa_source_get_latency_within_thread(u->source_output->source);
+ delay = pa_memblockq_get_length(u->source_output->thread_info.delay_memblockq);
+
+ delay = (u->source_output->thread_info.resampler ? pa_resampler_request(u->source_output->thread_info.resampler, delay) : delay);
+ rlen = pa_memblockq_get_length(u->source_memblockq);
+ plen = pa_memblockq_get_length(u->sink_memblockq);
+
+ snapshot->source_latency = latency;
+ snapshot->source_delay = delay;
+ snapshot->recv_counter = u->recv_counter;
+ snapshot->rlen = rlen;
+ snapshot->plen = plen;
+}
+
+
+/* Called from output thread context */
+static int source_output_process_msg_cb(pa_msgobject *obj, int code, void *data, int64_t offset, pa_memchunk *chunk) {
+ struct userdata *u = PA_SOURCE_OUTPUT(obj)->userdata;
+
+ switch (code) {
+
+ case SOURCE_OUTPUT_MESSAGE_POST:
+
+ pa_source_output_assert_io_context(u->source_output);
+
+ if (PA_SOURCE_IS_OPENED(u->source_output->source->thread_info.state))
+ pa_memblockq_push_align(u->sink_memblockq, chunk);
+ else
+ pa_memblockq_flush_write(u->sink_memblockq, TRUE);
+
+ u->recv_counter += (int64_t) chunk->length;
+
+ return 0;
+
+ case SOURCE_OUTPUT_MESSAGE_REWIND:
+ pa_source_output_assert_io_context(u->source_output);
+
+ /* manipulate write index, never go past what we have */
+ if (PA_SOURCE_IS_OPENED(u->source_output->source->thread_info.state))
+ pa_memblockq_seek(u->sink_memblockq, -offset, PA_SEEK_RELATIVE, TRUE);
+ else
+ pa_memblockq_flush_write(u->sink_memblockq, TRUE);
+
+ pa_log_debug("Sink rewind (%lld)", (long long) offset);
+
+ u->recv_counter -= offset;
+
+ return 0;
+
+ case SOURCE_OUTPUT_MESSAGE_LATENCY_SNAPSHOT: {
+ struct snapshot *snapshot = (struct snapshot *) data;
+
+ source_output_snapshot_within_thread(u, snapshot);
+ return 0;
+ }
+
+ case SOURCE_OUTPUT_MESSAGE_APPLY_DIFF_TIME:
+ apply_diff_time(u, offset);
+ return 0;
+
+ }
+
+ return pa_source_output_process_msg(obj, code, data, offset, chunk);
+}
+
+static int sink_input_process_msg_cb(pa_msgobject *obj, int code, void *data, int64_t offset, pa_memchunk *chunk) {
+ struct userdata *u = PA_SINK_INPUT(obj)->userdata;
+
+ switch (code) {
+
+ case SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT: {
+ size_t delay;
+ pa_usec_t latency;
+ struct snapshot *snapshot = (struct snapshot *) data;
+
+ pa_sink_input_assert_io_context(u->sink_input);
+
+ latency = pa_sink_get_latency_within_thread(u->sink_input->sink);
+ delay = pa_memblockq_get_length(u->sink_input->thread_info.render_memblockq);
+
+ delay = (u->sink_input->thread_info.resampler ? pa_resampler_request(u->sink_input->thread_info.resampler, delay) : delay);
+
+ snapshot->sink_latency = latency;
+ snapshot->sink_delay = delay;
+ snapshot->send_counter = u->send_counter;
+ return 0;
+ }
+ }
+
+ return pa_sink_input_process_msg(obj, code, data, offset, chunk);
+}
+
+/* Called from I/O thread context */
+static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
+ struct userdata *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ pa_log_debug("Sink input update max rewind %lld", (long long) nbytes);
+
+ pa_sink_set_max_rewind_within_thread(u->sink, nbytes);
+}
+
+/* Called from I/O thread context */
+static void source_output_update_max_rewind_cb(pa_source_output *o, size_t nbytes) {
+ struct userdata *u;
+
+ pa_source_output_assert_ref(o);
+ pa_assert_se(u = o->userdata);
+
+ pa_log_debug("Source output update max rewind %lld", (long long) nbytes);
+
+ pa_source_set_max_rewind_within_thread(u->source, nbytes);
+}
+
+/* Called from I/O thread context */
+static void sink_input_update_max_request_cb(pa_sink_input *i, size_t nbytes) {
+ struct userdata *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ pa_log_debug("Sink input update max rewind %lld", (long long) nbytes);
+
+ pa_sink_set_max_request_within_thread(u->sink, nbytes);
+}
+
+/* Called from I/O thread context */
+static void sink_input_update_sink_requested_latency_cb(pa_sink_input *i) {
+ struct userdata *u;
+ pa_usec_t latency;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ latency = pa_sink_get_requested_latency_within_thread(i->sink);
+
+ pa_log_debug("Sink input update requested latency %lld", (long long) latency);
+ pa_atomic_store (&u->request_resync, 1);
+}
+
+/* Called from I/O thread context */
+static void source_output_update_source_requested_latency_cb(pa_source_output *o) {
+ struct userdata *u;
+ pa_usec_t latency;
+
+ pa_source_output_assert_ref(o);
+ pa_assert_se(u = o->userdata);
+
+ latency = pa_source_get_requested_latency_within_thread(o->source);
+
+ pa_log_debug("source output update requested latency %lld", (long long) latency);
+ pa_atomic_store (&u->request_resync, 1);
+}
+
+/* Called from I/O thread context */
+static void sink_input_update_sink_latency_range_cb(pa_sink_input *i) {
+ struct userdata *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ pa_log_debug("Sink input update latency range %lld %lld",
+ (long long) i->sink->thread_info.min_latency,
+ (long long) i->sink->thread_info.max_latency);
+
+ pa_sink_set_latency_range_within_thread(u->sink, i->sink->thread_info.min_latency, i->sink->thread_info.max_latency);
+}
+
+/* Called from I/O thread context */
+static void source_output_update_source_latency_range_cb(pa_source_output *o) {
+ struct userdata *u;
+
+ pa_source_output_assert_ref(o);
+ pa_assert_se(u = o->userdata);
+
+ pa_log_debug("Source output update latency range %lld %lld",
+ (long long) o->source->thread_info.min_latency,
+ (long long) o->source->thread_info.max_latency);
+
+ pa_source_set_latency_range_within_thread(u->source, o->source->thread_info.min_latency, o->source->thread_info.max_latency);
+}
+
+/* Called from I/O thread context */
+static void sink_input_update_sink_fixed_latency_cb(pa_sink_input *i) {
+ struct userdata *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ pa_log_debug("Sink input update fixed latency %lld",
+ (long long) i->sink->thread_info.fixed_latency);
+
+ pa_sink_set_fixed_latency_within_thread(u->sink, i->sink->thread_info.fixed_latency);
+}
+
+/* Called from I/O thread context */
+static void source_output_update_source_fixed_latency_cb(pa_source_output *o) {
+ struct userdata *u;
+
+ pa_source_output_assert_ref(o);
+ pa_assert_se(u = o->userdata);
+
+ pa_log_debug("Source output update fixed latency %lld",
+ (long long) o->source->thread_info.fixed_latency);
+
+ pa_source_set_fixed_latency_within_thread(u->source, o->source->thread_info.fixed_latency);
+}
+
+/* Called from output thread context */
+static void source_output_attach_cb(pa_source_output *o) {
+ struct userdata *u;
+
+ pa_source_output_assert_ref(o);
+ pa_source_output_assert_io_context(o);
+ pa_assert_se(u = o->userdata);
+
+ pa_source_set_rtpoll(u->source, o->source->thread_info.rtpoll);
+ pa_source_set_latency_range_within_thread(u->source, o->source->thread_info.min_latency, o->source->thread_info.max_latency);
+ pa_source_set_fixed_latency_within_thread(u->source, o->source->thread_info.fixed_latency);
+ pa_source_set_max_rewind_within_thread(u->source, pa_source_output_get_max_rewind(o));
+
+ pa_log_debug("Source output %p attach", o);
+
+ pa_source_attach_within_thread(u->source);
+
+ u->rtpoll_item_read = pa_rtpoll_item_new_asyncmsgq_read(
+ o->source->thread_info.rtpoll,
+ PA_RTPOLL_LATE,
+ u->asyncmsgq);
+}
+
+/* Called from I/O thread context */
+static void sink_input_attach_cb(pa_sink_input *i) {
+ struct userdata *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ pa_sink_set_rtpoll(u->sink, i->sink->thread_info.rtpoll);
+ pa_sink_set_latency_range_within_thread(u->sink, i->sink->thread_info.min_latency, i->sink->thread_info.max_latency);
+
+ /* (8.1) IF YOU NEED A FIXED BLOCK SIZE ADD THE LATENCY FOR ONE
+ * BLOCK MINUS ONE SAMPLE HERE. SEE (7) */
+ pa_sink_set_fixed_latency_within_thread(u->sink, i->sink->thread_info.fixed_latency);
+
+ /* (8.2) IF YOU NEED A FIXED BLOCK SIZE ROUND
+ * pa_sink_input_get_max_request(i) UP TO MULTIPLES OF IT
+ * HERE. SEE (6) */
+ pa_sink_set_max_request_within_thread(u->sink, pa_sink_input_get_max_request(i));
+ pa_sink_set_max_rewind_within_thread(u->sink, pa_sink_input_get_max_rewind(i));
+
+ pa_log_debug("Sink input %p attach", i);
+
+ u->rtpoll_item_write = pa_rtpoll_item_new_asyncmsgq_write(
+ i->sink->thread_info.rtpoll,
+ PA_RTPOLL_LATE,
+ u->asyncmsgq);
+
+ pa_sink_attach_within_thread(u->sink);
+}
+
+
+/* Called from output thread context */
+static void source_output_detach_cb(pa_source_output *o) {
+ struct userdata *u;
+
+ pa_source_output_assert_ref(o);
+ pa_source_output_assert_io_context(o);
+ pa_assert_se(u = o->userdata);
+
+ pa_source_detach_within_thread(u->source);
+ pa_source_set_rtpoll(u->source, NULL);
+
+ pa_log_debug("Source output %p detach", o);
+
+ if (u->rtpoll_item_read) {
+ pa_rtpoll_item_free(u->rtpoll_item_read);
+ u->rtpoll_item_read = NULL;
+ }
+}
+
+/* Called from I/O thread context */
+static void sink_input_detach_cb(pa_sink_input *i) {
+ struct userdata *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ pa_sink_detach_within_thread(u->sink);
+
+ pa_sink_set_rtpoll(u->sink, NULL);
+
+ pa_log_debug("Sink input %p detach", i);
+
+ if (u->rtpoll_item_write) {
+ pa_rtpoll_item_free(u->rtpoll_item_write);
+ u->rtpoll_item_write = NULL;
+ }
+}
+
+/* Called from output thread context */
+static void source_output_state_change_cb(pa_source_output *o, pa_source_output_state_t state) {
+ struct userdata *u;
+
+ pa_source_output_assert_ref(o);
+ pa_source_output_assert_io_context(o);
+ pa_assert_se(u = o->userdata);
+
+ pa_log_debug("Source output %p state %d", o, state);
+}
+
+/* Called from IO thread context */
+static void sink_input_state_change_cb(pa_sink_input *i, pa_sink_input_state_t state) {
+ struct userdata *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ pa_log_debug("Sink input %p state %d", i, state);
+
+ /* If we are added for the first time, ask for a rewinding so that
+ * we are heard right-away. */
+ if (PA_SINK_INPUT_IS_LINKED(state) &&
+ i->thread_info.state == PA_SINK_INPUT_INIT) {
+ pa_log_debug("Requesting rewind due to state change.");
+ pa_sink_input_request_rewind(i, 0, FALSE, TRUE, TRUE);
+ }
+}
+
+/* Called from main thread */
+static void source_output_kill_cb(pa_source_output *o) {
+ struct userdata *u;
+
+ pa_source_output_assert_ref(o);
+ pa_assert_ctl_context();
+ pa_assert_se(u = o->userdata);
+
+ /* The order here matters! We first kill the source output, followed
+ * by the source. That means the source callbacks must be protected
+ * against an unconnected source output! */
+ pa_source_output_unlink(u->source_output);
+ pa_source_unlink(u->source);
+
+ pa_source_output_unref(u->source_output);
+ u->source_output = NULL;
+
+ pa_source_unref(u->source);
+ u->source = NULL;
+
+ pa_log_debug("Source output kill %p", o);
+
+ pa_module_unload_request(u->module, TRUE);
+}
+
+/* Called from main context */
+static void sink_input_kill_cb(pa_sink_input *i) {
+ struct userdata *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ /* The order here matters! We first kill the sink input, followed
+ * by the sink. That means the sink callbacks must be protected
+ * against an unconnected sink input! */
+ pa_sink_input_unlink(u->sink_input);
+ pa_sink_unlink(u->sink);
+
+ pa_sink_input_unref(u->sink_input);
+ u->sink_input = NULL;
+
+ pa_sink_unref(u->sink);
+ u->sink = NULL;
+
+ pa_log_debug("Sink input kill %p", i);
+
+ pa_module_unload_request(u->module, TRUE);
+}
+
+/* Called from main thread */
+static pa_bool_t source_output_may_move_to_cb(pa_source_output *o, pa_source *dest) {
+ struct userdata *u;
+
+ pa_source_output_assert_ref(o);
+ pa_assert_ctl_context();
+ pa_assert_se(u = o->userdata);
+
+ return TRUE;
+}
+
+/* Called from main context */
+static pa_bool_t sink_input_may_move_to_cb(pa_sink_input *i, pa_sink *dest) {
+ struct userdata *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ return u->sink != dest;
+}
+
+/* Called from main thread */
+static void source_output_moving_cb(pa_source_output *o, pa_source *dest) {
+ struct userdata *u;
+
+ pa_source_output_assert_ref(o);
+ pa_assert_ctl_context();
+ pa_assert_se(u = o->userdata);
+
+ if (dest) {
+ pa_source_set_asyncmsgq(u->source, dest->asyncmsgq);
+ pa_source_update_flags(u->source, PA_SOURCE_LATENCY|PA_SOURCE_DYNAMIC_LATENCY, dest->flags);
+ } else
+ pa_source_set_asyncmsgq(u->source, NULL);
+
+ if (u->source_auto_desc && dest) {
+ const char *z;
+ pa_proplist *pl;
+
+ pl = pa_proplist_new();
+ z = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION);
+ pa_proplist_setf(pl, PA_PROP_DEVICE_DESCRIPTION, "Echo-Cancel Source %s on %s",
+ pa_proplist_gets(u->source->proplist, "device.echo-cancel.name"), z ? z : dest->name);
+
+ pa_source_update_proplist(u->source, PA_UPDATE_REPLACE, pl);
+ pa_proplist_free(pl);
+ }
+}
+
+/* Called from main context */
+static void sink_input_moving_cb(pa_sink_input *i, pa_sink *dest) {
+ struct userdata *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ if (dest) {
+ pa_sink_set_asyncmsgq(u->sink, dest->asyncmsgq);
+ pa_sink_update_flags(u->sink, PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY, dest->flags);
+ } else
+ pa_sink_set_asyncmsgq(u->sink, NULL);
+
+ if (u->sink_auto_desc && dest) {
+ const char *z;
+ pa_proplist *pl;
+
+ pl = pa_proplist_new();
+ z = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION);
+ pa_proplist_setf(pl, PA_PROP_DEVICE_DESCRIPTION, "Echo-Cancel Sink %s on %s",
+ pa_proplist_gets(u->sink->proplist, "device.echo-cancel.name"), z ? z : dest->name);
+
+ pa_sink_update_proplist(u->sink, PA_UPDATE_REPLACE, pl);
+ pa_proplist_free(pl);
+ }
+}
+
+/* Called from main context */
+static void sink_input_volume_changed_cb(pa_sink_input *i) {
+ struct userdata *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ pa_sink_volume_changed(u->sink, &i->volume);
+}
+
+/* Called from main context */
+static void sink_input_mute_changed_cb(pa_sink_input *i) {
+ struct userdata *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert_se(u = i->userdata);
+
+ pa_sink_mute_changed(u->sink, i->muted);
+}
+
+
+int pa__init(pa_module*m) {
+ struct userdata *u;
+ pa_sample_spec ss;
+ pa_channel_map map;
+ pa_modargs *ma;
+ pa_source *source_master=NULL;
+ pa_sink *sink_master=NULL;
+ pa_source_output_new_data source_output_data;
+ pa_sink_input_new_data sink_input_data;
+ pa_source_new_data source_data;
+ pa_sink_new_data sink_data;
+ pa_memchunk silence;
+ int framelen, rate;
+ uint32_t frame_size_ms, filter_size_ms;
+ uint32_t adjust_time_sec;
+
+ pa_assert(m);
+
+ if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+ pa_log("Failed to parse module arguments.");
+ goto fail;
+ }
+
+ if (!(source_master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "source_master", NULL), PA_NAMEREG_SOURCE))) {
+ pa_log("Master source not found");
+ goto fail;
+ }
+ pa_assert(source_master);
+
+ if (!(sink_master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "sink_master", NULL), PA_NAMEREG_SINK))) {
+ pa_log("Master sink not found");
+ goto fail;
+ }
+ pa_assert(sink_master);
+
+ frame_size_ms = DEFAULT_FRAME_SIZE_MS;
+ if (pa_modargs_get_value_u32(ma, "frame_size_ms", &frame_size_ms) < 0 || frame_size_ms < 1 || frame_size_ms > 200) {
+ pa_log("Invalid frame_size_ms specification");
+ goto fail;
+ }
+
+ filter_size_ms = DEFAULT_FILTER_SIZE_MS;
+ if (pa_modargs_get_value_u32(ma, "filter_size_ms", &filter_size_ms) < 0 || filter_size_ms < 1 || filter_size_ms > 2000) {
+ pa_log("Invalid filter_size_ms specification");
+ goto fail;
+ }
+
+ ss = source_master->sample_spec;
+ ss.format = PA_SAMPLE_S16LE;
+ map = source_master->channel_map;
+ if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) {
+ pa_log("Invalid sample format specification or channel map");
+ goto fail;
+ }
+
+ u = pa_xnew0(struct userdata, 1);
+ if (!u) {
+ pa_log("Failed to alloc userdata");
+ goto fail;
+ }
+ u->core = m->core;
+ u->module = m;
+ m->userdata = u;
+ u->frame_size_ms = frame_size_ms;
+ rate = ss.rate;
+ framelen = (rate * frame_size_ms) / 1000;
+ u->blocksize = framelen * pa_frame_size (&ss);
+ pa_log_debug ("Using framelen %d, blocksize %lld, channels %d, rate %d", framelen, (long long) u->blocksize,
+ ss.channels, ss.rate);
+
+ adjust_time_sec = DEFAULT_ADJUST_TIME_USEC / PA_USEC_PER_SEC;
+ if (pa_modargs_get_value_u32(ma, "adjust_time", &adjust_time_sec) < 0) {
+ pa_log("Failed to parse adjust_time value");
+ goto fail;
+ }
+
+ if (adjust_time_sec != DEFAULT_ADJUST_TIME_USEC / PA_USEC_PER_SEC)
+ u->adjust_time = adjust_time_sec * PA_USEC_PER_SEC;
+ else
+ u->adjust_time = DEFAULT_ADJUST_TIME_USEC;
+
+ u->save_aec = DEFAULT_SAVE_AEC;
+ if (pa_modargs_get_value_u32(ma, "save_aec", &u->save_aec) < 0) {
+ pa_log("Failed to parse save_aec value");
+ goto fail;
+ }
+
+ u->asyncmsgq = pa_asyncmsgq_new(0);
+ u->need_realign = TRUE;
+ u->echo_state = speex_echo_state_init_mc (framelen, (rate * filter_size_ms) / 1000, ss.channels, ss.channels);
+ speex_echo_ctl(u->echo_state, SPEEX_ECHO_SET_SAMPLING_RATE, &rate);
+
+ /* Create source */
+ pa_source_new_data_init(&source_data);
+ source_data.driver = __FILE__;
+ source_data.module = m;
+ if (!(source_data.name = pa_xstrdup(pa_modargs_get_value(ma, "source_name", NULL))))
+ source_data.name = pa_sprintf_malloc("%s.echo-cancel", source_master->name);
+ pa_source_new_data_set_sample_spec(&source_data, &ss);
+ pa_source_new_data_set_channel_map(&source_data, &map);
+ pa_proplist_sets(source_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, source_master->name);
+ pa_proplist_sets(source_data.proplist, PA_PROP_DEVICE_CLASS, "filter");
+ pa_proplist_sets(source_data.proplist, "device.echo-cancel.name", source_data.name);
+
+ if (pa_modargs_get_proplist(ma, "source_properties", source_data.proplist, PA_UPDATE_REPLACE) < 0) {
+ pa_log("Invalid properties");
+ pa_source_new_data_done(&source_data);
+ goto fail;
+ }
+
+ if ((u->source_auto_desc = !pa_proplist_contains(source_data.proplist, PA_PROP_DEVICE_DESCRIPTION))) {
+ const char *z;
+
+ z = pa_proplist_gets(source_master->proplist, PA_PROP_DEVICE_DESCRIPTION);
+ pa_proplist_setf(source_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Echo-Cancel Source %s on %s", source_data.name, z ? z : source_master->name);
+ }
+
+ u->source = pa_source_new(m->core, &source_data,
+ PA_SOURCE_HW_MUTE_CTRL|PA_SOURCE_HW_VOLUME_CTRL|PA_SOURCE_DECIBEL_VOLUME|
+ (source_master->flags & (PA_SOURCE_LATENCY|PA_SOURCE_DYNAMIC_LATENCY)));
+ pa_source_new_data_done(&source_data);
+
+ if (!u->source) {
+ pa_log("Failed to create source.");
+ goto fail;
+ }
+
+ u->source->parent.process_msg = source_process_msg_cb;
+ u->source->set_state = source_set_state_cb;
+ u->source->update_requested_latency = source_update_requested_latency_cb;
+ u->source->set_volume = source_set_volume_cb;
+ u->source->set_mute = source_set_mute_cb;
+ u->source->get_volume = source_get_volume_cb;
+ u->source->get_mute = source_get_mute_cb;
+ u->source->userdata = u;
+
+ pa_source_set_asyncmsgq(u->source, source_master->asyncmsgq);
+
+ /* Create sink */
+ pa_sink_new_data_init(&sink_data);
+ sink_data.driver = __FILE__;
+ sink_data.module = m;
+ if (!(sink_data.name = pa_xstrdup(pa_modargs_get_value(ma, "sink_name", NULL))))
+ sink_data.name = pa_sprintf_malloc("%s.echo-cancel", sink_master->name);
+ pa_sink_new_data_set_sample_spec(&sink_data, &ss);
+ pa_sink_new_data_set_channel_map(&sink_data, &map);
+ pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, sink_master->name);
+ pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_CLASS, "filter");
+ pa_proplist_sets(sink_data.proplist, "device.echo-cancel.name", sink_data.name);
+
+ if (pa_modargs_get_proplist(ma, "sink_properties", sink_data.proplist, PA_UPDATE_REPLACE) < 0) {
+ pa_log("Invalid properties");
+ pa_sink_new_data_done(&sink_data);
+ goto fail;
+ }
+
+ if ((u->sink_auto_desc = !pa_proplist_contains(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION))) {
+ const char *z;
+
+ z = pa_proplist_gets(sink_master->proplist, PA_PROP_DEVICE_DESCRIPTION);
+ pa_proplist_setf(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Echo-Cancel Sink %s on %s", sink_data.name, z ? z : sink_master->name);
+ }
+
+ u->sink = pa_sink_new(m->core, &sink_data,
+ PA_SINK_HW_MUTE_CTRL|PA_SINK_HW_VOLUME_CTRL|PA_SINK_DECIBEL_VOLUME|
+ (sink_master->flags & (PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY)));
+ pa_sink_new_data_done(&sink_data);
+
+ if (!u->sink) {
+ pa_log("Failed to create sink.");
+ goto fail;
+ }
+
+ u->sink->parent.process_msg = sink_process_msg_cb;
+ u->sink->set_state = sink_set_state_cb;
+ u->sink->update_requested_latency = sink_update_requested_latency_cb;
+ u->sink->request_rewind = sink_request_rewind_cb;
+ u->sink->set_volume = sink_set_volume_cb;
+ u->sink->set_mute = sink_set_mute_cb;
+ u->sink->userdata = u;
+
+ pa_sink_set_asyncmsgq(u->sink, sink_master->asyncmsgq);
+
+ /* Create source output */
+ pa_source_output_new_data_init(&source_output_data);
+ source_output_data.driver = __FILE__;
+ source_output_data.module = m;
+ source_output_data.source = source_master;
+ /* FIXME
+ source_output_data.flags = PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND; */
+
+ pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_NAME, "Echo-Cancel Source Stream");
+ pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_ROLE, "filter");
+ pa_source_output_new_data_set_sample_spec(&source_output_data, &ss);
+ pa_source_output_new_data_set_channel_map(&source_output_data, &map);
+
+ pa_source_output_new(&u->source_output, m->core, &source_output_data);
+ pa_source_output_new_data_done(&source_output_data);
+
+ if (!u->source_output)
+ goto fail;
+
+ u->source_output->parent.process_msg = source_output_process_msg_cb;
+ u->source_output->push = source_output_push_cb;
+ u->source_output->process_rewind = source_output_process_rewind_cb;
+ u->source_output->update_max_rewind = source_output_update_max_rewind_cb;
+ u->source_output->update_source_requested_latency = source_output_update_source_requested_latency_cb;
+ u->source_output->update_source_latency_range = source_output_update_source_latency_range_cb;
+ u->source_output->update_source_fixed_latency = source_output_update_source_fixed_latency_cb;
+ u->source_output->kill = source_output_kill_cb;
+ u->source_output->attach = source_output_attach_cb;
+ u->source_output->detach = source_output_detach_cb;
+ u->source_output->state_change = source_output_state_change_cb;
+ u->source_output->may_move_to = source_output_may_move_to_cb;
+ u->source_output->moving = source_output_moving_cb;
+ u->source_output->userdata = u;
+
+ /* Create sink input */
+ pa_sink_input_new_data_init(&sink_input_data);
+ sink_input_data.driver = __FILE__;
+ sink_input_data.module = m;
+ sink_input_data.sink = sink_master;
+ pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_NAME, "Echo-Cancel Sink Stream");
+ pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "filter");
+ pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss);
+ pa_sink_input_new_data_set_channel_map(&sink_input_data, &map);
+ sink_input_data.flags = PA_SINK_INPUT_VARIABLE_RATE;
+
+ pa_sink_input_new(&u->sink_input, m->core, &sink_input_data);
+ pa_sink_input_new_data_done(&sink_input_data);
+
+ if (!u->sink_input)
+ goto fail;
+
+ u->sink_input->parent.process_msg = sink_input_process_msg_cb;
+ u->sink_input->pop = sink_input_pop_cb;
+ u->sink_input->process_rewind = sink_input_process_rewind_cb;
+ u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
+ u->sink_input->update_max_request = sink_input_update_max_request_cb;
+ u->sink_input->update_sink_requested_latency = sink_input_update_sink_requested_latency_cb;
+ u->sink_input->update_sink_latency_range = sink_input_update_sink_latency_range_cb;
+ u->sink_input->update_sink_fixed_latency = sink_input_update_sink_fixed_latency_cb;
+ u->sink_input->kill = sink_input_kill_cb;
+ u->sink_input->attach = sink_input_attach_cb;
+ u->sink_input->detach = sink_input_detach_cb;
+ u->sink_input->state_change = sink_input_state_change_cb;
+ u->sink_input->may_move_to = sink_input_may_move_to_cb;
+ u->sink_input->moving = sink_input_moving_cb;
+ u->sink_input->volume_changed = sink_input_volume_changed_cb;
+ u->sink_input->mute_changed = sink_input_mute_changed_cb;
+ u->sink_input->userdata = u;
+
+ pa_sink_input_get_silence(u->sink_input, &silence);
+
+ u->source_memblockq = pa_memblockq_new(0, MEMBLOCKQ_MAXLENGTH, 0,
+ pa_frame_size(&ss), 1, 1, 0, &silence);
+ u->sink_memblockq = pa_memblockq_new(0, MEMBLOCKQ_MAXLENGTH, 0,
+ pa_frame_size(&ss), 1, 1, 0, &silence);
+
+ pa_memblock_unref(silence.memblock);
+
+ if (!u->source_memblockq || !u->sink_memblockq) {
+ pa_log("Failed to create memblockq.");
+ goto fail;
+ }
+
+ if (u->adjust_time > 0)
+ u->time_event = pa_core_rttime_new(m->core, pa_rtclock_now() + u->adjust_time, time_callback, u);
+
+ if (u->save_aec) {
+ pa_log("Creating AEC files in /tmp");
+ u->captured_file = fopen("/tmp/aec_rec.sw", "wb");
+ if (u->captured_file == NULL)
+ perror ("fopen failed");
+ u->played_file = fopen("/tmp/aec_play.sw", "wb");
+ if (u->played_file == NULL)
+ perror ("fopen failed");
+ u->canceled_file = fopen("/tmp/aec_out.sw", "wb");
+ if (u->canceled_file == NULL)
+ perror ("fopen failed");
+ }
+
+ pa_sink_put(u->sink);
+ pa_source_put(u->source);
+
+ pa_sink_input_put(u->sink_input);
+ pa_source_output_put(u->source_output);
+
+ pa_modargs_free(ma);
+
+ return 0;
+
+ fail:
+ if (ma)
+ pa_modargs_free(ma);
+
+ pa__done(m);
+
+ return -1;
+}
+
+int pa__get_n_used(pa_module *m) {
+ struct userdata *u;
+
+ pa_assert(m);
+ pa_assert_se(u = m->userdata);
+
+ return pa_sink_linked_by(u->sink) + pa_source_linked_by(u->source);
+}
+
+void pa__done(pa_module*m) {
+ struct userdata *u;
+
+ pa_assert(m);
+
+ if (!(u = m->userdata))
+ return;
+
+ /* See comments in source_output_kill_cb() above regarding
+ * destruction order! */
+
+ if (u->source_output)
+ pa_source_output_unlink(u->source_output);
+ if (u->sink_input)
+ pa_sink_input_unlink(u->sink_input);
+
+ if (u->source)
+ pa_source_unlink(u->source);
+ if (u->sink)
+ pa_sink_unlink(u->sink);
+
+ if (u->source_output)
+ pa_source_output_unref(u->source_output);
+ if (u->sink_input)
+ pa_sink_input_unref(u->sink_input);
+
+ if (u->source)
+ pa_source_unref(u->source);
+ if (u->sink)
+ pa_sink_unref(u->sink);
+
+ if (u->time_event)
+ u->core->mainloop->time_free(u->time_event);
+
+ if (u->source_memblockq)
+ pa_memblockq_free(u->source_memblockq);
+ if (u->sink_memblockq)
+ pa_memblockq_free(u->sink_memblockq);
+
+ if (u->echo_state)
+ speex_echo_state_destroy (u->echo_state);
+
+ if (u->asyncmsgq)
+ pa_asyncmsgq_unref(u->asyncmsgq);
+
+ pa_xfree(u);
+}
projects / platform / upstream / pulseaudio.git / commitdiff