[pulseaudio-discuss] [PATCH] add xrdp sink
Jay Sorg
jay.sorg at gmail.com
Mon May 26 21:38:02 PDT 2014
---
src/Makefile.am | 10 +-
src/modules/module-xrdp-sink.c | 572 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 581 insertions(+), 1 deletion(-)
create mode 100644 src/modules/module-xrdp-sink.c
diff --git a/src/Makefile.am b/src/Makefile.am
index 1ac8a16..733b1b0 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1141,7 +1141,8 @@ modlibexec_LTLIBRARIES += \
module-cli-protocol-unix.la \
module-simple-protocol-unix.la \
module-http-protocol-unix.la \
- module-native-protocol-unix.la
+ module-native-protocol-unix.la \
+ module-xrdp-sink.la
if HAVE_ESOUND
modlibexec_LTLIBRARIES += \
module-esound-protocol-unix.la
@@ -1393,6 +1394,7 @@ SYMDEF_FILES = \
module-tunnel-source-symdef.h \
module-null-sink-symdef.h \
module-null-source-symdef.h \
+ module-xrdp-sink-symdef.h \
module-sine-source-symdef.h \
module-zeroconf-publish-symdef.h \
module-zeroconf-discover-symdef.h \
@@ -1590,6 +1592,12 @@ module_pipe_source_la_SOURCES = modules/module-pipe-source.c
module_pipe_source_la_LDFLAGS = $(MODULE_LDFLAGS)
module_pipe_source_la_LIBADD = $(MODULE_LIBADD)
+# xrdp
+
+module_xrdp_sink_la_SOURCES = modules/module-xrdp-sink.c
+module_xrdp_sink_la_LDFLAGS = $(MODULE_LDFLAGS)
+module_xrdp_sink_la_LIBADD = $(MODULE_LIBADD)
+
# Fake sources/sinks
module_sine_la_SOURCES = modules/module-sine.c
diff --git a/src/modules/module-xrdp-sink.c b/src/modules/module-xrdp-sink.c
new file mode 100644
index 0000000..994b1c5
--- /dev/null
+++ b/src/modules/module-xrdp-sink.c
@@ -0,0 +1,572 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright (C) Jay Sorg 2013-2014
+
+ 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 <unistd.h>
+#include <errno.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/types.h>
+
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+#include <sys/ioctl.h>
+#include <poll.h>
+
+#include <pulse/rtclock.h>
+#include <pulse/timeval.h>
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/core-error.h>
+#include <pulsecore/sink.h>
+#include <pulsecore/module.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/log.h>
+#include <pulsecore/thread.h>
+#include <pulsecore/thread-mq.h>
+#include <pulsecore/rtpoll.h>
+
+#include "module-xrdp-sink-symdef.h"
+
+PA_MODULE_AUTHOR("Jay Sorg");
+PA_MODULE_DESCRIPTION("xrdp sink");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(false);
+PA_MODULE_USAGE(
+ "sink_name=<name for the sink> "
+ "sink_properties=<properties for the sink> "
+ "format=<sample format> "
+ "rate=<sample rate>"
+ "channels=<number of channels> "
+ "channel_map=<channel map>");
+
+#define DEFAULT_SINK_NAME "xrdp-sink"
+#define BLOCK_USEC 30000
+#define CHANSRV_PORT_STR "/tmp/.xrdp/xrdp_chansrv_audio_out_socket_%d"
+
+struct userdata {
+ pa_core *core;
+ pa_module *module;
+ pa_sink *sink;
+
+ pa_thread *thread;
+ pa_thread_mq thread_mq;
+ pa_rtpoll *rtpoll;
+
+ pa_usec_t block_usec;
+ pa_usec_t timestamp;
+ pa_usec_t failed_connect_time;
+ pa_usec_t last_send_time;
+
+ int fd; /* unix domain socket connection to xrdp chansrv */
+ int display_num;
+ int skip_bytes;
+ int got_max_latency;
+
+};
+
+struct xrdp_header {
+ int code;
+ int bytes;
+};
+
+static const char* const valid_modargs[] = {
+ "sink_name",
+ "sink_properties",
+ "format",
+ "rate",
+ "channels",
+ "channel_map",
+ NULL
+};
+
+static int close_send(struct userdata *u) {
+ struct xrdp_header h;
+
+ pa_log("close_send:");
+ if (u->fd == 0) {
+ return 0;
+ }
+ h.code = 1;
+ h.bytes = 8;
+ if (send(u->fd, &h, 8, 0) != 8) {
+ pa_log("close_send: send failed");
+ close(u->fd);
+ u->fd = 0;
+ return 0;
+ } else {
+ pa_log_debug("close_send: sent header ok");
+ }
+ return 8;
+}
+
+static int sink_process_msg(pa_msgobject *o, int code, void *data,
+ int64_t offset, pa_memchunk *chunk) {
+
+ struct userdata *u = PA_SINK(o)->userdata;
+ pa_usec_t now;
+ long lat;
+
+ pa_log_debug("sink_process_msg: code %d", code);
+
+ switch (code) {
+
+ case PA_SINK_MESSAGE_SET_VOLUME: /* 3 */
+ break;
+
+ case PA_SINK_MESSAGE_SET_MUTE: /* 6 */
+ break;
+
+ case PA_SINK_MESSAGE_GET_LATENCY: /* 7 */
+ now = pa_rtclock_now();
+ lat = u->timestamp > now ? u->timestamp - now : 0ULL;
+ pa_log_debug("sink_process_msg: lat %ld", lat);
+ *((pa_usec_t*) data) = lat;
+ return 0;
+
+ case PA_SINK_MESSAGE_GET_REQUESTED_LATENCY: /* 8 */
+ break;
+
+ case PA_SINK_MESSAGE_SET_STATE: /* 9 */
+ if (PA_PTR_TO_UINT(data) == PA_SINK_RUNNING) /* 0 */ {
+ pa_log("sink_process_msg: running");
+
+ u->timestamp = pa_rtclock_now();
+ } else {
+ pa_log("sink_process_msg: not running");
+ close_send(u);
+ }
+ break;
+
+ }
+
+ return pa_sink_process_msg(o, code, data, offset, chunk);
+}
+
+static void sink_update_requested_latency_cb(pa_sink *s) {
+ struct userdata *u;
+ size_t nbytes;
+
+ pa_sink_assert_ref(s);
+ pa_assert_se(u = s->userdata);
+
+ u->block_usec = BLOCK_USEC;
+
+ u->got_max_latency = 0;
+ if (u->block_usec == (pa_usec_t) -1) {
+ u->block_usec = s->thread_info.max_latency;
+ u->got_max_latency = 1;
+ }
+
+ nbytes = pa_usec_to_bytes(u->block_usec, &s->sample_spec);
+ pa_sink_set_max_rewind_within_thread(s, nbytes);
+ pa_sink_set_max_request_within_thread(s, nbytes);
+}
+
+static void process_rewind(struct userdata *u, pa_usec_t now) {
+ size_t rewind_nbytes, in_buffer;
+ pa_usec_t delay;
+
+ pa_assert(u);
+
+ /* Figure out how much we shall rewind and reset the counter */
+ rewind_nbytes = u->sink->thread_info.rewind_nbytes;
+ u->sink->thread_info.rewind_nbytes = 0;
+
+ pa_assert(rewind_nbytes > 0);
+ pa_log_debug("Requested to rewind %lu bytes.",
+ (unsigned long) rewind_nbytes);
+
+ if (u->timestamp <= now)
+ goto do_nothing;
+
+ delay = u->timestamp - now;
+ in_buffer = pa_usec_to_bytes(delay, &u->sink->sample_spec);
+
+ if (in_buffer <= 0)
+ goto do_nothing;
+
+ if (rewind_nbytes > in_buffer)
+ rewind_nbytes = in_buffer;
+
+ pa_sink_process_rewind(u->sink, rewind_nbytes);
+ u->timestamp -= pa_bytes_to_usec(rewind_nbytes, &u->sink->sample_spec);
+ u->skip_bytes += rewind_nbytes;
+
+ pa_log_debug("Rewound %lu bytes.", (unsigned long) rewind_nbytes);
+ return;
+
+do_nothing:
+
+ pa_sink_process_rewind(u->sink, 0);
+}
+
+static int get_display_num_from_display(char *display_text) {
+ int lindex;
+ int mode;
+ int host_index;
+ int disp_index;
+ int scre_index;
+ int display_num;
+ char host[256];
+ char disp[256];
+ char scre[256];
+
+ if (display_text == NULL) {
+ return 0;
+ }
+ memset(host, 0, 256);
+ memset(disp, 0, 256);
+ memset(scre, 0, 256);
+
+ lindex = 0;
+ host_index = 0;
+ disp_index = 0;
+ scre_index = 0;
+ mode = 0;
+
+ while (display_text[lindex] != 0) {
+ if (display_text[lindex] == ':') {
+ mode = 1;
+ } else if (display_text[lindex] == '.') {
+ mode = 2;
+ } else if (mode == 0) {
+ host[host_index] = display_text[lindex];
+ host_index++;
+ if (host_index > 255) {
+ return 0;
+ }
+ } else if (mode == 1) {
+ disp[disp_index] = display_text[lindex];
+ disp_index++;
+ if (disp_index > 255) {
+ return 0;
+ }
+ } else if (mode == 2) {
+ scre[scre_index] = display_text[lindex];
+ scre_index++;
+ if (scre_index > 255) {
+ return 0;
+ }
+ }
+ lindex++;
+ }
+
+ host[host_index] = 0;
+ disp[disp_index] = 0;
+ scre[scre_index] = 0;
+ display_num = atoi(disp);
+ return display_num;
+}
+
+static int data_send(struct userdata *u, pa_memchunk *chunk) {
+ char *data;
+ int bytes;
+ int sent;
+ int fd;
+ struct xrdp_header h;
+ struct sockaddr_un s;
+
+ if (u->fd == 0) {
+ if (u->failed_connect_time != 0) {
+ if (pa_rtclock_now() - u->failed_connect_time < 1000000) {
+ return 0;
+ }
+ }
+ fd = socket(PF_LOCAL, SOCK_STREAM, 0);
+ memset(&s, 0, sizeof(s));
+ s.sun_family = AF_UNIX;
+ bytes = sizeof(s.sun_path) - 1;
+ snprintf(s.sun_path, bytes, CHANSRV_PORT_STR, u->display_num);
+ pa_log_debug("trying to conenct to %s", s.sun_path);
+ if (connect(fd, (struct sockaddr *)&s,
+ sizeof(struct sockaddr_un)) != 0) {
+ u->failed_connect_time = pa_rtclock_now();
+ pa_log_debug("Connected failed");
+ close(fd);
+ return 0;
+ }
+ u->failed_connect_time = 0;
+ pa_log("Connected ok fd %d", fd);
+ u->fd = fd;
+ }
+
+ bytes = chunk->length;
+ pa_log_debug("bytes %d", bytes);
+
+ /* from rewind */
+ if (u->skip_bytes > 0) {
+ if (bytes > u->skip_bytes) {
+ bytes -= u->skip_bytes;
+ u->skip_bytes = 0;
+ } else {
+ u->skip_bytes -= bytes;
+ return bytes;
+ }
+ }
+
+ h.code = 0;
+ h.bytes = bytes + 8;
+ if (send(u->fd, &h, 8, 0) != 8) {
+ pa_log("data_send: send failed");
+ close(u->fd);
+ u->fd = 0;
+ return 0;
+ } else {
+ pa_log_debug("data_send: sent header ok bytes %d", bytes);
+ }
+
+ data = (char*)pa_memblock_acquire(chunk->memblock);
+ data += chunk->index;
+ sent = send(u->fd, data, bytes, 0);
+ pa_memblock_release(chunk->memblock);
+
+ if (sent != bytes) {
+ pa_log("data_send: send failed sent %d bytes %d", sent, bytes);
+ close(u->fd);
+ u->fd = 0;
+ return 0;
+ }
+
+ return sent;
+}
+
+static void process_render(struct userdata *u, pa_usec_t now) {
+ pa_memchunk chunk;
+ int request_bytes;
+
+ pa_assert(u);
+ if (u->got_max_latency) {
+ return;
+ }
+ pa_log_debug("process_render: u->block_usec %d", (int)(u->block_usec));
+ while (u->timestamp < now + u->block_usec) {
+ request_bytes = u->sink->thread_info.max_request;
+ request_bytes = MIN(request_bytes, 16 * 1024);
+ pa_sink_render(u->sink, request_bytes, &chunk);
+ data_send(u, &chunk);
+ pa_memblock_unref(chunk.memblock);
+ u->timestamp += pa_bytes_to_usec(chunk.length, &u->sink->sample_spec);
+ }
+}
+
+static void thread_func(void *userdata) {
+
+ struct userdata *u = userdata;
+ int ret;
+ pa_usec_t now;
+
+ pa_assert(u);
+
+ pa_log_debug("Thread starting up");
+
+ pa_thread_mq_install(&u->thread_mq);
+
+ u->timestamp = pa_rtclock_now();
+
+ for (;;) {
+
+ if (u->sink->thread_info.state == PA_SINK_RUNNING) {
+
+ now = pa_rtclock_now();
+
+ if (u->sink->thread_info.rewind_requested) {
+ if (u->sink->thread_info.rewind_nbytes > 0) {
+ process_rewind(u, now);
+ } else {
+ pa_sink_process_rewind(u->sink, 0);
+ }
+ }
+
+ if (u->timestamp <= now) {
+ pa_log_debug("thread_func: calling process_render");
+ process_render(u, now);
+ }
+
+ pa_rtpoll_set_timer_absolute(u->rtpoll, u->timestamp);
+
+ } else {
+ pa_rtpoll_set_timer_disabled(u->rtpoll);
+ }
+
+ if ((ret = pa_rtpoll_run(u->rtpoll, true)) < 0) {
+ goto fail;
+ }
+
+ if (ret == 0) {
+ goto finish;
+ }
+ }
+
+fail:
+ /* If this was no regular exit from the loop we have to continue
+ * processing messages until we received PA_MESSAGE_SHUTDOWN */
+ pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core),
+ PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0,
+ NULL, NULL);
+ pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
+
+finish:
+ pa_log_debug("Thread shutting down");
+}
+
+int pa__init(pa_module*m) {
+ struct userdata *u = NULL;
+ pa_sample_spec ss;
+ pa_channel_map map;
+ pa_modargs *ma = NULL;
+ pa_sink_new_data data;
+ size_t nbytes;
+
+ pa_assert(m);
+
+ if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+ pa_log("Failed to parse module arguments.");
+ goto fail;
+ }
+
+ ss = m->core->default_sample_spec;
+ map = m->core->default_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;
+ }
+
+ m->userdata = u = pa_xnew0(struct userdata, 1);
+ u->core = m->core;
+ u->module = m;
+ u->rtpoll = pa_rtpoll_new();
+ pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
+
+ pa_sink_new_data_init(&data);
+ data.driver = __FILE__;
+ data.module = m;
+ pa_sink_new_data_set_name(&data,
+ pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME));
+ pa_sink_new_data_set_sample_spec(&data, &ss);
+ pa_sink_new_data_set_channel_map(&data, &map);
+ pa_proplist_sets(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "xrdp sink");
+ pa_proplist_sets(data.proplist, PA_PROP_DEVICE_CLASS, "abstract");
+
+ if (pa_modargs_get_proplist(ma, "sink_properties", data.proplist,
+ PA_UPDATE_REPLACE) < 0) {
+ pa_log("Invalid properties");
+ pa_sink_new_data_done(&data);
+ goto fail;
+ }
+
+ u->sink = pa_sink_new(m->core, &data,
+ PA_SINK_LATENCY | PA_SINK_DYNAMIC_LATENCY);
+ pa_sink_new_data_done(&data);
+
+ if (!u->sink) {
+ pa_log("Failed to create sink object.");
+ goto fail;
+ }
+
+ u->sink->parent.process_msg = sink_process_msg;
+ u->sink->update_requested_latency = sink_update_requested_latency_cb;
+ u->sink->userdata = u;
+
+ pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
+ pa_sink_set_rtpoll(u->sink, u->rtpoll);
+
+ u->block_usec = BLOCK_USEC;
+ nbytes = pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec);
+ pa_sink_set_max_rewind(u->sink, nbytes);
+ pa_sink_set_max_request(u->sink, nbytes);
+
+ u->display_num = get_display_num_from_display(getenv("DISPLAY"));
+
+ if (!(u->thread = pa_thread_new("xrdp-sink", thread_func, u))) {
+ pa_log("Failed to create thread.");
+ goto fail;
+ }
+
+ pa_sink_put(u->sink);
+
+ 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);
+}
+
+void pa__done(pa_module*m) {
+ struct userdata *u;
+
+ pa_assert(m);
+
+ if (!(u = m->userdata)) {
+ return;
+ }
+
+ if (u->sink) {
+ pa_sink_unlink(u->sink);
+ }
+
+ if (u->thread) {
+ pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN,
+ NULL, 0, NULL);
+ pa_thread_free(u->thread);
+ }
+
+ pa_thread_mq_done(&u->thread_mq);
+
+ if (u->sink) {
+ pa_sink_unref(u->sink);
+ }
+
+ if (u->rtpoll) {
+ pa_rtpoll_free(u->rtpoll);
+ }
+
+ pa_xfree(u);
+}
--
1.7.9.5
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