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- /**
- * xrdp: A Remote Desktop Protocol server.
- * pulse sink
- *
- * Copyright (C) Jay Sorg 2013
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
- /*
- * see pulse-notes.txt
- */
-
- #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 <pulse/i18n.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"
- #define BLOCK_USEC (PA_USEC_PER_SEC * 2)
- #define CHANSRV_PORT_STR "/tmp/.xrdp/xrdp_chansrv_audio_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;
-
- };
-
- static const char* const valid_modargs[] = {
- "sink_name",
- "sink_properties",
- "format",
- "rate",
- "channels",
- "channel_map",
- NULL
- };
-
- 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("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("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");
- }
- 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 = pa_sink_get_requested_latency_within_thread(s);
-
- 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);
- }
-
- struct header {
- int code;
- int bytes;
- };
-
- static int get_display_num_from_display(char *display_text) {
- int index;
- int mode;
- int host_index;
- int disp_index;
- int scre_index;
- int display_num;
- char host[256];
- char disp[256];
- char scre[256];
-
- memset(host, 0, 256);
- memset(disp, 0, 256);
- memset(scre, 0, 256);
-
- index = 0;
- host_index = 0;
- disp_index = 0;
- scre_index = 0;
- mode = 0;
-
- while (display_text[index] != 0) {
- if (display_text[index] == ':') {
- mode = 1;
- } else if (display_text[index] == '.') {
- mode = 2;
- } else if (mode == 0) {
- host[host_index] = display_text[index];
- host_index++;
- } else if (mode == 1) {
- disp[disp_index] = display_text[index];
- disp_index++;
- } else if (mode == 2) {
- scre[scre_index] = display_text[index];
- scre_index++;
- }
- index++;
- }
-
- 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 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("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("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("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("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;
- //int index;
-
- pa_assert(u);
-
- if (u->got_max_latency) {
- return;
- }
-
- //index = 0;
- while (u->timestamp < now + u->block_usec) {
- //index++;
- //if (index > 3) {
- /* used when u->block_usec and
- u->sink->thread_info.max_request get big
- using got_max_latency now */
- // return;
- //}
- request_bytes = u->sink->thread_info.max_request;
- request_bytes = MIN(request_bytes, 16 * 1024);
- pa_sink_render(u->sink, request_bytes, &chunk);
- //pa_log("bytes %d index %d", chunk.length, index);
- 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) {
- 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 defined(PA_CHECK_VERSION)
- #if PA_CHECK_VERSION(0, 9, 22)
- if (!(u->thread = pa_thread_new("xrdp-sink", thread_func, u))) {
- #else
- if (!(u->thread = pa_thread_new(thread_func, u))) {
- #endif
- #else
- if (!(u->thread = pa_thread_new(thread_func, u))) {
- #endif
- 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);
- }
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