diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Makefile.am | 8 | ||||
| -rw-r--r-- | src/modules/module-echo-cancel.c | 1609 |
2 files changed, 1617 insertions, 0 deletions
diff --git a/src/Makefile.am b/src/Makefile.am index ec301dad..4345e024 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -1017,6 +1017,7 @@ modlibexec_LTLIBRARIES += \ module-rescue-streams.la \ module-intended-roles.la \ module-suspend-on-idle.la \ + module-echo-cancel.la \ module-http-protocol-tcp.la \ module-sine.la \ module-native-protocol-tcp.la \ @@ -1248,6 +1249,7 @@ SYMDEF_FILES = \ modules/module-rescue-streams-symdef.h \ modules/module-intended-roles-symdef.h \ modules/module-suspend-on-idle-symdef.h \ + modules/module-echo-cancel-symdef.h \ modules/module-hal-detect-symdef.h \ modules/module-udev-detect-symdef.h \ modules/bluetooth/module-bluetooth-proximity-symdef.h \ @@ -1602,6 +1604,12 @@ module_suspend_on_idle_la_LDFLAGS = $(MODULE_LDFLAGS) module_suspend_on_idle_la_LIBADD = $(AM_LIBADD) libpulsecore-@PA_MAJORMINORMICRO@.la libpulsecommon-@PA_MAJORMINORMICRO@.la libpulse.la module_suspend_on_idle_la_CFLAGS = $(AM_CFLAGS) +# echo-cancel module +module_echo_cancel_la_SOURCES = modules/module-echo-cancel.c +module_echo_cancel_la_LDFLAGS = $(MODULE_LDFLAGS) +module_echo_cancel_la_LIBADD = $(AM_LIBADD) libpulsecore-@PA_MAJORMINORMICRO@.la libpulsecommon-@PA_MAJORMINORMICRO@.la libpulse.la $(LIBSPEEX_LIBS) +module_echo_cancel_la_CFLAGS = $(AM_CFLAGS) $(LIBSPEEX_CFLAGS) + # RTP modules module_rtp_send_la_SOURCES = modules/rtp/module-rtp-send.c module_rtp_send_la_LDFLAGS = $(MODULE_LDFLAGS) diff --git a/src/modules/module-echo-cancel.c b/src/modules/module-echo-cancel.c new file mode 100644 index 00000000..3d7a6efb --- /dev/null +++ b/src/modules/module-echo-cancel.c @@ -0,0 +1,1609 @@ +/*** + 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); +} |