mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-01 22:58:47 -04:00
loopback: add loopback module for direct connections of sinks and sources
This commit is contained in:
Lennart Poettering
parent
827ae07c1e
commit
ea4b65b8e0
2 changed files with 714 additions and 3 deletions
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@ -1010,8 +1010,8 @@ modlibexec_LTLIBRARIES += \
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module-tunnel-source.la \
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module-position-event-sounds.la \
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module-augment-properties.la \
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module-cork-music-on-phone.la
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module-cork-music-on-phone.la \
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module-loopback.la
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# See comment at librtp.la above
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if !OS_IS_WIN32
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@ -1249,7 +1249,8 @@ SYMDEF_FILES = \
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modules/module-position-event-sounds-symdef.h \
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modules/module-augment-properties-symdef.h \
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modules/module-cork-music-on-phone-symdef.h \
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modules/module-console-kit-symdef.h
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modules/module-console-kit-symdef.h \
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modules/module-loopback-symdef.h
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EXTRA_DIST += $(SYMDEF_FILES)
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BUILT_SOURCES += $(SYMDEF_FILES)
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@ -1391,6 +1392,10 @@ module_tunnel_source_la_SOURCES = modules/module-tunnel.c
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module_tunnel_source_la_LDFLAGS = $(MODULE_LDFLAGS)
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module_tunnel_source_la_LIBADD = $(AM_LIBADD) libpulsecore-@PA_MAJORMINORMICRO@.la libpulsecommon-@PA_MAJORMINORMICRO@.la libpulse.la
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module_loopback_la_SOURCES = modules/module-loopback.c
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module_loopback_la_LDFLAGS = $(MODULE_LDFLAGS)
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module_loopback_la_LIBADD = $(AM_LIBADD) libpulsecore-@PA_MAJORMINORMICRO@.la libpulsecommon-@PA_MAJORMINORMICRO@.la libpulse.la
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# X11
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module_x11_bell_la_SOURCES = modules/x11/module-x11-bell.c
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706
src/modules/module-loopback.c
Normal file
706
src/modules/module-loopback.c
Normal file
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@ -0,0 +1,706 @@
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/***
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This file is part of PulseAudio.
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Copyright 2009 Intel Corporation
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Contributor: Pierre-Louis Bossart <pierre-louis.bossart@intel.com>
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <math.h>
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#include <pulse/xmalloc.h>
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#include <pulsecore/sink-input.h>
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#include <pulsecore/module.h>
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#include <pulsecore/modargs.h>
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#include <pulsecore/namereg.h>
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#include <pulsecore/log.h>
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#include <pulsecore/core-util.h>
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#include <pulse/rtclock.h>
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#include <pulse/timeval.h>
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#include "module-loopback-symdef.h"
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PA_MODULE_AUTHOR("Pierre-Louis Bossart");
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PA_MODULE_DESCRIPTION("Loopback from source to sink");
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PA_MODULE_VERSION(PACKAGE_VERSION);
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PA_MODULE_LOAD_ONCE(FALSE);
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PA_MODULE_USAGE(
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"source=<source to connect to> "
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"sink=<sink to connect to> "
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"adjust_time=<how often to readjust rates in s> "
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"latency_msec=<latency in ms> "
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"format=<sample format> "
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"rate=<sample rate> "
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"channels=<number of channels> "
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"channel_map=<channel map>");
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#define DEFAULT_LATENCY_MSEC 200
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#define MEMBLOCKQ_MAXLENGTH (1024*1024*16)
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#define DEFAULT_ADJUST_TIME_USEC (10*PA_USEC_PER_SEC)
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struct userdata {
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pa_core *core;
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pa_module *module;
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pa_sink_input *sink_input;
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pa_source_output *source_output;
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pa_asyncmsgq *asyncmsgq;
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pa_memblockq *memblockq;
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pa_rtpoll_item *rtpoll_item_read, *rtpoll_item_write;
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pa_time_event *time_event;
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pa_usec_t adjust_time;
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int64_t recv_counter;
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int64_t send_counter;
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size_t skip;
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pa_usec_t latency;
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pa_bool_t in_pop;
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size_t min_memblockq_length;
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struct {
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int64_t send_counter;
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size_t source_output_buffer;
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pa_usec_t source_latency;
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int64_t recv_counter;
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size_t sink_input_buffer;
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pa_usec_t sink_latency;
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size_t min_memblockq_length;
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size_t max_request;
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} latency_snapshot;
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};
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static const char* const valid_modargs[] = {
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"source",
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"sink",
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"latency",
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"format",
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"rate",
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"channels",
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"channel_map",
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NULL,
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};
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enum {
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SINK_INPUT_MESSAGE_POST = PA_SINK_INPUT_MESSAGE_MAX,
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SINK_INPUT_MESSAGE_REWIND,
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SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT,
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SINK_INPUT_MESSAGE_MAX_REQUEST_CHANGED
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};
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enum {
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SOURCE_OUTPUT_MESSAGE_LATENCY_SNAPSHOT
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};
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/* Called from main context */
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static void teardown(struct userdata *u) {
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pa_assert(u);
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pa_assert_ctl_context();
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if (u->sink_input)
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pa_sink_input_unlink(u->sink_input);
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if (u->source_output)
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pa_source_output_unlink(u->source_output);
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if (u->sink_input) {
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pa_sink_input_unref(u->sink_input);
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u->sink_input = NULL;
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}
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if (u->source_output) {
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pa_source_output_unref(u->source_output);
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u->source_output = NULL;
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}
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}
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/* Called from main context */
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static void adjust_rates(struct userdata *u) {
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size_t buffer, fs;
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uint32_t old_rate, base_rate, new_rate;
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pa_usec_t buffer_latency;
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pa_assert(u);
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pa_assert_ctl_context();
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pa_asyncmsgq_send(u->source_output->source->asyncmsgq, PA_MSGOBJECT(u->source_output), SOURCE_OUTPUT_MESSAGE_LATENCY_SNAPSHOT, NULL, 0, NULL);
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pa_asyncmsgq_send(u->sink_input->sink->asyncmsgq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT, NULL, 0, NULL);
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buffer =
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u->latency_snapshot.sink_input_buffer +
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u->latency_snapshot.source_output_buffer;
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if (u->latency_snapshot.recv_counter <= u->latency_snapshot.send_counter)
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buffer += (size_t) (u->latency_snapshot.send_counter - u->latency_snapshot.recv_counter);
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else
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buffer += PA_CLIP_SUB(buffer, (size_t) (u->latency_snapshot.recv_counter - u->latency_snapshot.send_counter));
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buffer_latency = pa_bytes_to_usec(buffer, &u->sink_input->sample_spec);
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pa_log_info("Loopback overall latency is %0.2f ms + %0.2f ms + %0.2f ms = %0.2f ms",
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(double) u->latency_snapshot.sink_latency / PA_USEC_PER_MSEC,
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(double) buffer_latency / PA_USEC_PER_MSEC,
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(double) u->latency_snapshot.source_latency / PA_USEC_PER_MSEC,
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((double) u->latency_snapshot.sink_latency + buffer_latency + u->latency_snapshot.source_latency) / PA_USEC_PER_MSEC);
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pa_log_info("Should buffer %lu bytes, buffered at minimum %lu bytes",
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u->latency_snapshot.max_request*2,
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u->latency_snapshot.min_memblockq_length);
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fs = pa_frame_size(&u->sink_input->sample_spec);
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old_rate = u->sink_input->sample_spec.rate;
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base_rate = u->source_output->sample_spec.rate;
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if (u->latency_snapshot.min_memblockq_length < u->latency_snapshot.max_request*2)
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new_rate = base_rate - (((u->latency_snapshot.max_request*2 - u->latency_snapshot.min_memblockq_length) / fs) *PA_USEC_PER_SEC)/u->adjust_time;
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else
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new_rate = base_rate + (((u->latency_snapshot.min_memblockq_length - u->latency_snapshot.max_request*2) / fs) *PA_USEC_PER_SEC)/u->adjust_time;
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pa_log_info("Old rate %lu Hz, new rate %lu Hz", (unsigned long) old_rate, (unsigned long) new_rate);
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pa_sink_input_set_rate(u->sink_input, new_rate);
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pa_core_rttime_restart(u->core, u->time_event, pa_rtclock_now() + u->adjust_time);
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}
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/* Called from main context */
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static void time_callback(pa_mainloop_api *a, pa_time_event *e, const struct timeval *t, void *userdata) {
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struct userdata *u = userdata;
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pa_assert(u);
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pa_assert(a);
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pa_assert(u->time_event == e);
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adjust_rates(u);
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}
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/* Called from input thread context */
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static void source_output_push_cb(pa_source_output *o, const pa_memchunk *chunk) {
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struct userdata *u;
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pa_memchunk copy;
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pa_source_output_assert_ref(o);
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pa_source_output_assert_io_context(o);
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pa_assert_se(u = o->userdata);
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if (u->skip > chunk->length) {
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u->skip -= chunk->length;
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return;
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}
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if (u->skip > 0) {
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copy = *chunk;
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copy.index += u->skip;
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copy.length -= u->skip;
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u->skip = 0;
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chunk = ©
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}
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pa_asyncmsgq_post(u->asyncmsgq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_POST, NULL, 0, chunk, NULL);
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u->send_counter += (int64_t) chunk->length;
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}
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/* Called from input thread context */
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static void source_output_process_rewind_cb(pa_source_output *o, size_t nbytes) {
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struct userdata *u;
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pa_source_output_assert_ref(o);
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pa_source_output_assert_io_context(o);
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pa_assert_se(u = o->userdata);
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pa_asyncmsgq_post(u->asyncmsgq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_REWIND, NULL, (int64_t) nbytes, NULL, NULL);
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u->send_counter -= (int64_t) nbytes;
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}
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/* Called from output thread context */
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static int source_output_process_msg_cb(pa_msgobject *obj, int code, void *data, int64_t offset, pa_memchunk *chunk) {
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struct userdata *u = PA_SOURCE_OUTPUT(obj)->userdata;
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switch (code) {
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case SOURCE_OUTPUT_MESSAGE_LATENCY_SNAPSHOT: {
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size_t length;
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length = pa_memblockq_get_length(u->source_output->thread_info.delay_memblockq);
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u->latency_snapshot.send_counter = u->send_counter;
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u->latency_snapshot.source_output_buffer = u->source_output->thread_info.resampler ? pa_resampler_result(u->source_output->thread_info.resampler, length) : length;
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u->latency_snapshot.source_latency = pa_source_get_latency_within_thread(u->source_output->source);
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return 0;
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}
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}
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return pa_source_output_process_msg(obj, code, data, offset, chunk);
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}
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/* Called from output thread context */
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static void source_output_attach_cb(pa_source_output *o) {
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struct userdata *u;
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pa_source_output_assert_ref(o);
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pa_source_output_assert_io_context(o);
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pa_assert_se(u = o->userdata);
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u->rtpoll_item_write = pa_rtpoll_item_new_asyncmsgq_write(
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o->source->thread_info.rtpoll,
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PA_RTPOLL_LATE,
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u->asyncmsgq);
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}
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/* Called from output thread context */
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static void source_output_detach_cb(pa_source_output *o) {
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struct userdata *u;
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pa_source_output_assert_ref(o);
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pa_source_output_assert_io_context(o);
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pa_assert_se(u = o->userdata);
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if (u->rtpoll_item_write) {
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pa_rtpoll_item_free(u->rtpoll_item_write);
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u->rtpoll_item_write = NULL;
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}
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}
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/* Called from output thread context */
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static void source_output_state_change_cb(pa_source_output *o, pa_source_output_state_t state) {
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struct userdata *u;
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pa_source_output_assert_ref(o);
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pa_source_output_assert_io_context(o);
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pa_assert_se(u = o->userdata);
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if (PA_SOURCE_OUTPUT_IS_LINKED(state) && o->thread_info.state == PA_SOURCE_OUTPUT_INIT) {
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u->skip = pa_usec_to_bytes(PA_CLIP_SUB(pa_source_get_latency_within_thread(o->source),
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u->latency),
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&o->sample_spec);
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pa_log_info("Skipping %lu bytes", (unsigned long) u->skip);
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}
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}
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/* Called from main thread */
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static void source_output_kill_cb(pa_source_output *o) {
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struct userdata *u;
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pa_source_output_assert_ref(o);
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pa_assert_ctl_context();
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pa_assert_se(u = o->userdata);
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teardown(u);
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pa_module_unload_request(u->module, TRUE);
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}
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/* Called from output thread context */
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static void update_min_memblockq_length(struct userdata *u) {
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size_t length;
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pa_assert(u);
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pa_sink_input_assert_io_context(u->sink_input);
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length = pa_memblockq_get_length(u->memblockq);
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if (u->min_memblockq_length == (size_t) -1 ||
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length < u->min_memblockq_length)
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u->min_memblockq_length = length;
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}
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/* Called from output thread context */
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static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
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struct userdata *u;
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pa_sink_input_assert_ref(i);
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pa_sink_input_assert_io_context(i);
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pa_assert_se(u = i->userdata);
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pa_assert(chunk);
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u->in_pop = TRUE;
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while (pa_asyncmsgq_process_one(u->asyncmsgq) > 0)
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;
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u->in_pop = FALSE;
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if (pa_memblockq_peek(u->memblockq, chunk) < 0) {
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pa_log_info("Coud not peek into queue");
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return -1;
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}
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chunk->length = PA_MIN(chunk->length, nbytes);
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pa_memblockq_drop(u->memblockq, chunk->length);
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update_min_memblockq_length(u);
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return 0;
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}
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/* Called from output thread context */
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static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
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struct userdata *u;
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pa_sink_input_assert_ref(i);
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pa_sink_input_assert_io_context(i);
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pa_assert_se(u = i->userdata);
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pa_memblockq_rewind(u->memblockq, nbytes);
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}
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/* Called from output thread context */
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static int sink_input_process_msg_cb(pa_msgobject *obj, int code, void *data, int64_t offset, pa_memchunk *chunk) {
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struct userdata *u = PA_SINK_INPUT(obj)->userdata;
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switch (code) {
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case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
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pa_usec_t *r = data;
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pa_sink_input_assert_io_context(u->sink_input);
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*r = pa_bytes_to_usec(pa_memblockq_get_length(u->memblockq), &u->sink_input->sample_spec);
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/* Fall through, the default handler will add in the extra
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* latency added by the resampler */
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break;
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}
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case SINK_INPUT_MESSAGE_POST:
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pa_sink_input_assert_io_context(u->sink_input);
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if (PA_SINK_IS_OPENED(u->sink_input->sink->thread_info.state))
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pa_memblockq_push_align(u->memblockq, chunk);
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else
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pa_memblockq_flush_write(u->memblockq);
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update_min_memblockq_length(u);
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||||
|
||||
/* Is this the end of an underrun? Then let's start things
|
||||
* right-away */
|
||||
if (!u->in_pop &&
|
||||
u->sink_input->thread_info.underrun_for > 0 &&
|
||||
pa_memblockq_is_readable(u->memblockq)) {
|
||||
|
||||
pa_log_debug("Requesting rewind due to end of underrun.");
|
||||
pa_sink_input_request_rewind(u->sink_input,
|
||||
(size_t) (u->sink_input->thread_info.underrun_for == (size_t) -1 ? 0 : u->sink_input->thread_info.underrun_for),
|
||||
FALSE, TRUE, FALSE);
|
||||
}
|
||||
|
||||
u->recv_counter += (int64_t) chunk->length;
|
||||
|
||||
return 0;
|
||||
|
||||
case SINK_INPUT_MESSAGE_REWIND:
|
||||
|
||||
pa_sink_input_assert_io_context(u->sink_input);
|
||||
|
||||
if (PA_SINK_IS_OPENED(u->sink_input->sink->thread_info.state))
|
||||
pa_memblockq_seek(u->memblockq, -offset, PA_SEEK_RELATIVE, TRUE);
|
||||
else
|
||||
pa_memblockq_flush_write(u->memblockq);
|
||||
|
||||
u->recv_counter -= offset;
|
||||
|
||||
update_min_memblockq_length(u);
|
||||
|
||||
return 0;
|
||||
|
||||
case SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT: {
|
||||
size_t length;
|
||||
|
||||
update_min_memblockq_length(u);
|
||||
|
||||
length = pa_memblockq_get_length(u->sink_input->thread_info.render_memblockq);
|
||||
|
||||
u->latency_snapshot.recv_counter = u->recv_counter;
|
||||
u->latency_snapshot.sink_input_buffer =
|
||||
pa_memblockq_get_length(u->memblockq) +
|
||||
(u->sink_input->thread_info.resampler ? pa_resampler_request(u->sink_input->thread_info.resampler, length) : length);
|
||||
u->latency_snapshot.sink_latency = pa_sink_get_latency_within_thread(u->sink_input->sink);
|
||||
|
||||
u->latency_snapshot.max_request = pa_sink_input_get_max_request(u->sink_input);
|
||||
|
||||
u->latency_snapshot.min_memblockq_length = u->min_memblockq_length;
|
||||
u->min_memblockq_length = (size_t) -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
case SINK_INPUT_MESSAGE_MAX_REQUEST_CHANGED: {
|
||||
/* This message is sent from the IO thread to the main
|
||||
* thread! So don't be confused. All the user cases above
|
||||
* are executed in thread context, but this one is not! */
|
||||
|
||||
pa_assert_ctl_context();
|
||||
|
||||
adjust_rates(u);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
return pa_sink_input_process_msg(obj, code, data, offset, chunk);
|
||||
}
|
||||
|
||||
/* Called from output thread context */
|
||||
static void sink_input_attach_cb(pa_sink_input *i) {
|
||||
struct userdata *u;
|
||||
|
||||
pa_sink_input_assert_ref(i);
|
||||
pa_sink_input_assert_io_context(i);
|
||||
pa_assert_se(u = i->userdata);
|
||||
|
||||
u->rtpoll_item_read = pa_rtpoll_item_new_asyncmsgq_read(
|
||||
i->sink->thread_info.rtpoll,
|
||||
PA_RTPOLL_LATE,
|
||||
u->asyncmsgq);
|
||||
|
||||
pa_memblockq_set_prebuf(u->memblockq, pa_sink_input_get_max_request(i)*2);
|
||||
pa_memblockq_set_maxrewind(u->memblockq, pa_sink_input_get_max_rewind(i));
|
||||
|
||||
u->min_memblockq_length = (size_t) -1;
|
||||
}
|
||||
|
||||
/* Called from output thread context */
|
||||
static void sink_input_detach_cb(pa_sink_input *i) {
|
||||
struct userdata *u;
|
||||
|
||||
pa_sink_input_assert_ref(i);
|
||||
pa_sink_input_assert_io_context(i);
|
||||
pa_assert_se(u = i->userdata);
|
||||
|
||||
if (u->rtpoll_item_read) {
|
||||
pa_rtpoll_item_free(u->rtpoll_item_read);
|
||||
u->rtpoll_item_read = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
/* Called from output 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_sink_input_assert_io_context(i);
|
||||
pa_assert_se(u = i->userdata);
|
||||
|
||||
pa_memblockq_set_maxrewind(u->memblockq, nbytes);
|
||||
}
|
||||
|
||||
/* Called from output 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_sink_input_assert_io_context(i);
|
||||
pa_assert_se(u = i->userdata);
|
||||
|
||||
pa_memblockq_set_prebuf(u->memblockq, nbytes*2);
|
||||
pa_log_info("Max request changed");
|
||||
pa_asyncmsgq_post(pa_thread_mq_get()->outq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_MAX_REQUEST_CHANGED, NULL, 0, NULL, NULL);
|
||||
}
|
||||
|
||||
/* Called from main thread */
|
||||
static void sink_input_kill_cb(pa_sink_input *i) {
|
||||
struct userdata *u;
|
||||
|
||||
pa_sink_input_assert_ref(i);
|
||||
pa_assert_ctl_context();
|
||||
pa_assert_se(u = i->userdata);
|
||||
|
||||
teardown(u);
|
||||
pa_module_unload_request(u->module, TRUE);
|
||||
}
|
||||
|
||||
int pa__init(pa_module *m) {
|
||||
pa_modargs *ma = NULL;
|
||||
struct userdata *u;
|
||||
pa_sink *sink;
|
||||
pa_sink_input_new_data sink_input_data;
|
||||
pa_source *source;
|
||||
pa_source_output_new_data source_output_data;
|
||||
uint32_t latency_msec;
|
||||
pa_sample_spec ss;
|
||||
pa_channel_map map;
|
||||
pa_memchunk silence;
|
||||
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 = pa_namereg_get(m->core, pa_modargs_get_value(ma, "source", NULL), PA_NAMEREG_SOURCE))) {
|
||||
pa_log("No such source.");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if (!(sink = pa_namereg_get(m->core, pa_modargs_get_value(ma, "sink", NULL), PA_NAMEREG_SINK))) {
|
||||
pa_log("No such sink.");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
ss = sink->sample_spec;
|
||||
map = sink->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;
|
||||
}
|
||||
|
||||
latency_msec = DEFAULT_LATENCY_MSEC;
|
||||
if (pa_modargs_get_value_u32(ma, "latency_msec", &latency_msec) < 0 || latency_msec < 1 || latency_msec > 2000) {
|
||||
pa_log("Invalid latency specification");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
m->userdata = u = pa_xnew0(struct userdata, 1);
|
||||
u->core = m->core;
|
||||
u->module = m;
|
||||
u->latency = (pa_usec_t) latency_msec * PA_USEC_PER_MSEC;
|
||||
|
||||
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;
|
||||
|
||||
pa_sink_input_new_data_init(&sink_input_data);
|
||||
sink_input_data.driver = __FILE__;
|
||||
sink_input_data.module = m;
|
||||
sink_input_data.sink = sink;
|
||||
pa_proplist_setf(sink_input_data.proplist, PA_PROP_MEDIA_NAME, "Loopback of %s", pa_proplist_gets(source->proplist, PA_PROP_DEVICE_DESCRIPTION));
|
||||
pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "abstract");
|
||||
pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss);
|
||||
pa_sink_input_new_data_set_channel_map(&sink_input_data, &map);
|
||||
|
||||
pa_sink_input_new(&u->sink_input, m->core, &sink_input_data, PA_SINK_INPUT_VARIABLE_RATE);
|
||||
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->kill = sink_input_kill_cb;
|
||||
u->sink_input->attach = sink_input_attach_cb;
|
||||
u->sink_input->detach = sink_input_detach_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->userdata = u;
|
||||
|
||||
pa_sink_input_set_requested_latency(u->sink_input, u->latency/3);
|
||||
|
||||
pa_source_output_new_data_init(&source_output_data);
|
||||
source_output_data.driver = __FILE__;
|
||||
source_output_data.module = m;
|
||||
source_output_data.source = source;
|
||||
pa_proplist_setf(source_output_data.proplist, PA_PROP_MEDIA_NAME, "Loopback to %s", pa_proplist_gets(sink->proplist, PA_PROP_DEVICE_DESCRIPTION));
|
||||
pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_ROLE, "abstract");
|
||||
pa_source_output_new_data_set_sample_spec(&source_output_data, &ss);
|
||||
pa_sink_input_new_data_set_channel_map(&sink_input_data, &map);
|
||||
|
||||
pa_source_output_new(&u->source_output, m->core, &source_output_data, 0);
|
||||
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->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->userdata = u;
|
||||
|
||||
pa_source_output_set_requested_latency(u->source_output, u->latency/3);
|
||||
|
||||
pa_sink_input_get_silence(u->sink_input, &silence);
|
||||
u->memblockq = pa_memblockq_new(
|
||||
0, /* idx */
|
||||
MEMBLOCKQ_MAXLENGTH, /* maxlength */
|
||||
MEMBLOCKQ_MAXLENGTH, /* tlength */
|
||||
pa_frame_size(&ss), /* base */
|
||||
0, /* prebuf */
|
||||
0, /* minreq */
|
||||
0, /* maxrewind */
|
||||
&silence); /* silence frame */
|
||||
pa_memblock_unref(silence.memblock);
|
||||
|
||||
u->asyncmsgq = pa_asyncmsgq_new(0);
|
||||
|
||||
pa_sink_input_put(u->sink_input);
|
||||
pa_source_output_put(u->source_output);
|
||||
|
||||
if (u->adjust_time > 0)
|
||||
u->time_event = pa_core_rttime_new(m->core, pa_rtclock_now() + u->adjust_time, time_callback, u);
|
||||
|
||||
pa_modargs_free(ma);
|
||||
return 0;
|
||||
|
||||
fail:
|
||||
if (ma)
|
||||
pa_modargs_free(ma);
|
||||
|
||||
pa__done(m);
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
void pa__done(pa_module*m) {
|
||||
struct userdata *u;
|
||||
|
||||
pa_assert(m);
|
||||
|
||||
if (!(u = m->userdata))
|
||||
return;
|
||||
|
||||
teardown(u);
|
||||
|
||||
if (u->memblockq)
|
||||
pa_memblockq_free(u->memblockq);
|
||||
|
||||
if (u->asyncmsgq)
|
||||
pa_asyncmsgq_unref(u->asyncmsgq);
|
||||
|
||||
if (u->time_event)
|
||||
u->core->mainloop->time_free(u->time_event);
|
||||
|
||||
pa_xfree(u);
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue