[pulseaudio-discuss] [PATCH] modules: add module-remap-source
Stefan Huber
s.huber at bct-electronic.com
Fri Feb 22 09:26:19 PST 2013
---
src/Makefile.am | 6 +
src/modules/module-remap-source.c | 460 +++++++++++++++++++++++++++++++++++++
2 files changed, 466 insertions(+)
create mode 100644 src/modules/module-remap-source.c
diff --git a/src/Makefile.am b/src/Makefile.am
index 8aacf92..7685e0c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1074,6 +1074,7 @@ modlibexec_LTLIBRARIES += \
module-combine.la \
module-combine-sink.la \
module-remap-sink.la \
+ module-remap-source.la \
module-ladspa-sink.la \
module-tunnel-sink.la \
module-tunnel-source.la \
@@ -1339,6 +1340,7 @@ SYMDEF_FILES = \
module-combine-symdef.h \
module-combine-sink-symdef.h \
module-remap-sink-symdef.h \
+ module-remap-source-symdef.h \
module-ladspa-sink-symdef.h \
module-equalizer-sink-symdef.h \
module-match-symdef.h \
@@ -1589,6 +1591,10 @@ module_remap_sink_la_SOURCES = modules/module-remap-sink.c
module_remap_sink_la_LDFLAGS = $(MODULE_LDFLAGS)
module_remap_sink_la_LIBADD = $(MODULE_LIBADD)
+module_remap_source_la_SOURCES = modules/module-remap-source.c
+module_remap_source_la_LDFLAGS = $(MODULE_LDFLAGS)
+module_remap_source_la_LIBADD = $(MODULE_LIBADD)
+
module_ladspa_sink_la_SOURCES = modules/module-ladspa-sink.c modules/ladspa.h
module_ladspa_sink_la_CFLAGS = -DLADSPA_PATH=\"$(libdir)/ladspa:/usr/local/lib/ladspa:/usr/lib/ladspa:/usr/local/lib64/ladspa:/usr/lib64/ladspa\" $(AM_CFLAGS)
module_ladspa_sink_la_LDFLAGS = $(MODULE_LDFLAGS)
diff --git a/src/modules/module-remap-source.c b/src/modules/module-remap-source.c
new file mode 100644
index 0000000..48d17d9
--- /dev/null
+++ b/src/modules/module-remap-source.c
@@ -0,0 +1,460 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2013 bct electronic GmbH
+ Contributor: Stefan Huber <s.huber at bct-electronic.com>
+
+
+ PulseAudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2.1 of the License,
+ or (at your option) any later version.
+
+ PulseAudio is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ 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 <pulse/xmalloc.h>
+
+#include <pulsecore/i18n.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/namereg.h>
+#include <pulsecore/module.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/log.h>
+#include <pulsecore/rtpoll.h>
+#include <pulsecore/sample-util.h>
+#include <pulsecore/ltdl-helper.h>
+#include <pulsecore/mix.h>
+
+#include "module-remap-source-symdef.h"
+
+PA_MODULE_AUTHOR("Stefan Huber");
+PA_MODULE_DESCRIPTION("Virtual channel remapping source");
+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> "
+ "master=<name of source to filter> "
+ "master_channel_map=<channel map> "
+ "format=<sample format> "
+ "rate=<sample rate> "
+ "channels=<number of channels> "
+ "channel_map=<channel map> "
+ "remix=<remix channels?>");
+
+struct userdata {
+ pa_module *module;
+
+ pa_source *source;
+ pa_source_output *source_output;
+
+ bool auto_desc;
+};
+
+static const char* const valid_modargs[] = {
+ "source_name",
+ "source_properties",
+ "master",
+ "master_channel_map",
+ "format",
+ "rate",
+ "channels",
+ "channel_map",
+ "remix",
+ NULL
+};
+
+/* Called from 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);
+
+ return 0;
+ }
+
+ return pa_source_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_source_output_cork(u->source_output, state == PA_SOURCE_SUSPENDED);
+ 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 output thread context */
+static void source_output_push_cb(pa_source_output *o, const pa_memchunk *chunk) {
+ struct userdata *u;
+
+ 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;
+ }
+
+ pa_source_post(u->source, chunk);
+}
+
+/* Called from output 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);
+}
+
+/* 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) {
+ return pa_source_output_process_msg(obj, code, data, offset, chunk);
+}
+
+/* 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);
+}
+
+/* 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_source_attach_within_thread(u->source);
+}
+
+/* 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_module_unload_request(u->module, true);
+}
+
+/* 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 %d state %d.", o->index, state);
+}
+
+
+/* Called from main thread */
+static bool 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 u->source != 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->auto_desc && dest) {
+ const char *k;
+ pa_proplist *pl;
+
+ pl = pa_proplist_new();
+ k = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION);
+ pa_proplist_setf(pl, PA_PROP_DEVICE_DESCRIPTION, "Remapped %s", k ? k : dest->name);
+
+ pa_source_update_proplist(u->source, PA_UPDATE_REPLACE, pl);
+ pa_proplist_free(pl);
+ }
+}
+
+int pa__init(pa_module*m) {
+ struct userdata *u;
+ pa_sample_spec ss;
+ pa_channel_map source_map, stream_map;
+ pa_modargs *ma;
+ pa_source *master;
+ pa_source_output_new_data source_output_data;
+ pa_source_new_data source_data;
+ bool remix = true;
+
+ pa_assert(m);
+
+ if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+ pa_log("Failed to parse module arguments.");
+ goto fail;
+ }
+
+ if (!(master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "master", NULL), PA_NAMEREG_SOURCE))) {
+ pa_log("Master source not found.");
+ goto fail;
+ }
+
+ ss = master->sample_spec;
+ source_map = master->channel_map;
+ if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &source_map, PA_CHANNEL_MAP_DEFAULT) < 0) {
+ pa_log("Invalid sample format specification or channel map.");
+ goto fail;
+ }
+
+ stream_map = source_map;
+ if (pa_modargs_get_channel_map(ma, "master_channel_map", &stream_map) < 0) {
+ pa_log("Invalid master channel map.");
+ goto fail;
+ }
+
+ if (stream_map.channels != ss.channels) {
+ pa_log("Number of channels doesn't match.");
+ goto fail;
+ }
+
+ if (pa_channel_map_equal(&stream_map, &master->channel_map))
+ pa_log_warn("No remapping configured, proceeding nonetheless!");
+
+ if (pa_modargs_get_value_boolean(ma, "remix", &remix) < 0) {
+ pa_log("Invalid boolean remix parameter.");
+ goto fail;
+ }
+
+ u = pa_xnew0(struct userdata, 1);
+ if (!u) {
+ pa_log("Failed to alloc userdata.");
+ goto fail;
+ }
+ u->module = m;
+ m->userdata = u;
+
+ /* 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.remapped", master->name);
+ pa_source_new_data_set_sample_spec(&source_data, &ss);
+ pa_source_new_data_set_channel_map(&source_data, &source_map);
+ pa_proplist_sets(source_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name);
+ pa_proplist_sets(source_data.proplist, PA_PROP_DEVICE_CLASS, "filter");
+
+ 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->auto_desc = !pa_proplist_contains(source_data.proplist, PA_PROP_DEVICE_DESCRIPTION))) {
+ const char *k;
+
+ k = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION);
+ pa_proplist_setf(source_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Remapped %s", k ? k : master->name);
+ }
+
+ u->source = pa_source_new(m->core, &source_data, 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->userdata = u;
+
+ pa_source_set_asyncmsgq(u->source, master->asyncmsgq);
+
+ /* Create source output */
+ pa_source_output_new_data_init(&source_output_data);
+ source_output_data.driver = __FILE__;
+ source_output_data.module = m;
+ pa_source_output_new_data_set_source(&source_output_data, master, false);
+ source_output_data.destination_source = u->source;
+ /* FIXME
+ source_output_data.flags = PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND; */
+
+ pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_NAME, "Remapped 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, &stream_map);
+ source_output_data.flags = remix ? 0 : PA_SOURCE_OUTPUT_NO_REMIX;
+
+ 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->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;
+
+ u->source->output_from_master = u->source_output;
+
+ pa_source_put(u->source);
+ 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_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->source)
+ pa_source_unlink(u->source);
+
+ if (u->source_output)
+ pa_source_output_unref(u->source_output);
+
+ if (u->source)
+ pa_source_unref(u->source);
+
+ pa_xfree(u);
+}
--
1.7.9.5
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