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560 lines
14 KiB
560 lines
14 KiB
/**
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* xrdp: A Remote Desktop Protocol server.
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* pulse sink
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*
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* Copyright (C) Jay Sorg 2013
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* see pulse-notes.txt
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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 <unistd.h>
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#include <errno.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <limits.h>
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#include <sys/ioctl.h>
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#include <poll.h>
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#include <pulse/rtclock.h>
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#include <pulse/timeval.h>
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#include <pulse/xmalloc.h>
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#include <pulse/i18n.h>
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#include <pulsecore/core-error.h>
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#include <pulsecore/sink.h>
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#include <pulsecore/module.h>
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#include <pulsecore/core-util.h>
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#include <pulsecore/modargs.h>
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#include <pulsecore/log.h>
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#include <pulsecore/thread.h>
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#include <pulsecore/thread-mq.h>
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#include <pulsecore/rtpoll.h>
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#include "module-xrdp-sink-symdef.h"
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PA_MODULE_AUTHOR("Jay Sorg");
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PA_MODULE_DESCRIPTION("xrdp 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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"sink_name=<name for the sink> "
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"sink_properties=<properties for the sink> "
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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_SINK_NAME "xrdp"
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#define BLOCK_USEC (PA_USEC_PER_SEC * 2)
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#define CHANSRV_PORT_STR "/tmp/.xrdp/xrdp_chansrv_audio_socket_%d"
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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 *sink;
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pa_thread *thread;
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pa_thread_mq thread_mq;
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pa_rtpoll *rtpoll;
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pa_usec_t block_usec;
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pa_usec_t timestamp;
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pa_usec_t failed_connect_time;
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pa_usec_t last_send_time;
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int fd; /* unix domain socket connection to xrdp chansrv */
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int display_num;
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int skip_bytes;
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int got_max_latency;
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};
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static const char* const valid_modargs[] = {
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"sink_name",
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"sink_properties",
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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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static int sink_process_msg(pa_msgobject *o, int code, void *data,
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int64_t offset, pa_memchunk *chunk) {
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struct userdata *u = PA_SINK(o)->userdata;
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pa_usec_t now;
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long lat;
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//pa_log("sink_process_msg: code %d", code);
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switch (code) {
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case PA_SINK_MESSAGE_SET_VOLUME: /* 3 */
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break;
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case PA_SINK_MESSAGE_SET_MUTE: /* 6 */
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break;
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case PA_SINK_MESSAGE_GET_LATENCY: /* 7 */
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now = pa_rtclock_now();
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lat = u->timestamp > now ? u->timestamp - now : 0ULL;
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//pa_log("sink_process_msg: lat %ld", lat);
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*((pa_usec_t*) data) = lat;
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return 0;
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case PA_SINK_MESSAGE_GET_REQUESTED_LATENCY: /* 8 */
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break;
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case PA_SINK_MESSAGE_SET_STATE: /* 9 */
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if (PA_PTR_TO_UINT(data) == PA_SINK_RUNNING) /* 0 */ {
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pa_log("sink_process_msg: running");
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u->timestamp = pa_rtclock_now();
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} else {
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pa_log("sink_process_msg: not running");
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}
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break;
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}
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return pa_sink_process_msg(o, code, data, offset, chunk);
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}
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static void sink_update_requested_latency_cb(pa_sink *s) {
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struct userdata *u;
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size_t nbytes;
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pa_sink_assert_ref(s);
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pa_assert_se(u = s->userdata);
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u->block_usec = pa_sink_get_requested_latency_within_thread(s);
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u->got_max_latency = 0;
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if (u->block_usec == (pa_usec_t) -1) {
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u->block_usec = s->thread_info.max_latency;
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u->got_max_latency = 1;
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}
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nbytes = pa_usec_to_bytes(u->block_usec, &s->sample_spec);
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pa_sink_set_max_rewind_within_thread(s, nbytes);
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pa_sink_set_max_request_within_thread(s, nbytes);
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}
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static void process_rewind(struct userdata *u, pa_usec_t now) {
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size_t rewind_nbytes, in_buffer;
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pa_usec_t delay;
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pa_assert(u);
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/* Figure out how much we shall rewind and reset the counter */
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rewind_nbytes = u->sink->thread_info.rewind_nbytes;
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u->sink->thread_info.rewind_nbytes = 0;
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pa_assert(rewind_nbytes > 0);
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pa_log_debug("Requested to rewind %lu bytes.",
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(unsigned long) rewind_nbytes);
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if (u->timestamp <= now)
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goto do_nothing;
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delay = u->timestamp - now;
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in_buffer = pa_usec_to_bytes(delay, &u->sink->sample_spec);
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if (in_buffer <= 0)
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goto do_nothing;
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if (rewind_nbytes > in_buffer)
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rewind_nbytes = in_buffer;
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pa_sink_process_rewind(u->sink, rewind_nbytes);
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u->timestamp -= pa_bytes_to_usec(rewind_nbytes, &u->sink->sample_spec);
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u->skip_bytes += rewind_nbytes;
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pa_log_debug("Rewound %lu bytes.", (unsigned long) rewind_nbytes);
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return;
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do_nothing:
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pa_sink_process_rewind(u->sink, 0);
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}
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struct header {
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int code;
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int bytes;
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};
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static int get_display_num_from_display(char *display_text) {
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int index;
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int mode;
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int host_index;
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int disp_index;
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int scre_index;
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int display_num;
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char host[256];
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char disp[256];
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char scre[256];
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memset(host, 0, 256);
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memset(disp, 0, 256);
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memset(scre, 0, 256);
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index = 0;
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host_index = 0;
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disp_index = 0;
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scre_index = 0;
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mode = 0;
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while (display_text[index] != 0) {
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if (display_text[index] == ':') {
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mode = 1;
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} else if (display_text[index] == '.') {
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mode = 2;
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} else if (mode == 0) {
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host[host_index] = display_text[index];
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host_index++;
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} else if (mode == 1) {
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disp[disp_index] = display_text[index];
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disp_index++;
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} else if (mode == 2) {
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scre[scre_index] = display_text[index];
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scre_index++;
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}
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index++;
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}
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host[host_index] = 0;
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disp[disp_index] = 0;
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scre[scre_index] = 0;
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display_num = atoi(disp);
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return display_num;
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}
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static int data_send(struct userdata *u, pa_memchunk *chunk) {
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char *data;
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int bytes;
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int sent;
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int fd;
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struct header h;
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struct sockaddr_un s;
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if (u->fd == 0) {
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if (u->failed_connect_time != 0) {
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if (pa_rtclock_now() - u->failed_connect_time < 1000000) {
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return 0;
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}
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}
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fd = socket(PF_LOCAL, SOCK_STREAM, 0);
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memset(&s, 0, sizeof(s));
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s.sun_family = AF_UNIX;
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bytes = sizeof(s.sun_path) - 1;
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snprintf(s.sun_path, bytes, CHANSRV_PORT_STR, u->display_num);
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pa_log("trying to conenct to %s", s.sun_path);
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if (connect(fd, (struct sockaddr *)&s,
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sizeof(struct sockaddr_un)) != 0) {
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u->failed_connect_time = pa_rtclock_now();
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pa_log("Connected failed");
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close(fd);
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return 0;
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}
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u->failed_connect_time = 0;
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pa_log("Connected ok fd %d", fd);
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u->fd = fd;
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}
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bytes = chunk->length;
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//pa_log("bytes %d", bytes);
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/* from rewind */
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if (u->skip_bytes > 0) {
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if (bytes > u->skip_bytes) {
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bytes -= u->skip_bytes;
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u->skip_bytes = 0;
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} else {
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u->skip_bytes -= bytes;
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return bytes;
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}
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}
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h.code = 0;
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h.bytes = bytes + 8;
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if (send(u->fd, &h, 8, 0) != 8) {
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pa_log("data_send: send failed");
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close(u->fd);
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u->fd = 0;
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return 0;
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} else {
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//pa_log("data_send: sent header ok bytes %d", bytes);
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}
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data = (char*)pa_memblock_acquire(chunk->memblock);
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data += chunk->index;
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sent = send(u->fd, data, bytes, 0);
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pa_memblock_release(chunk->memblock);
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if (sent != bytes) {
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pa_log("data_send: send failed sent %d bytes %d", sent, bytes);
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close(u->fd);
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u->fd = 0;
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return 0;
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}
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return sent;
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}
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static void process_render(struct userdata *u, pa_usec_t now) {
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pa_memchunk chunk;
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int request_bytes;
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//int index;
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pa_assert(u);
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if (u->got_max_latency) {
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return;
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}
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//index = 0;
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while (u->timestamp < now + u->block_usec) {
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//index++;
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//if (index > 3) {
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/* used when u->block_usec and
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u->sink->thread_info.max_request get big
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using got_max_latency now */
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// return;
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//}
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request_bytes = u->sink->thread_info.max_request;
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request_bytes = MIN(request_bytes, 16 * 1024);
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pa_sink_render(u->sink, request_bytes, &chunk);
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//pa_log("bytes %d index %d", chunk.length, index);
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data_send(u, &chunk);
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pa_memblock_unref(chunk.memblock);
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u->timestamp += pa_bytes_to_usec(chunk.length, &u->sink->sample_spec);
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}
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}
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static void thread_func(void *userdata) {
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struct userdata *u = userdata;
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int ret;
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pa_usec_t now;
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pa_assert(u);
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pa_log_debug("Thread starting up");
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pa_thread_mq_install(&u->thread_mq);
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u->timestamp = pa_rtclock_now();
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for (;;) {
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if (u->sink->thread_info.state == PA_SINK_RUNNING) {
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now = pa_rtclock_now();
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if (u->sink->thread_info.rewind_requested) {
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if (u->sink->thread_info.rewind_nbytes > 0) {
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process_rewind(u, now);
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} else {
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pa_sink_process_rewind(u->sink, 0);
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}
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}
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if (u->timestamp <= now) {
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process_render(u, now);
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}
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pa_rtpoll_set_timer_absolute(u->rtpoll, u->timestamp);
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} else {
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pa_rtpoll_set_timer_disabled(u->rtpoll);
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}
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if ((ret = pa_rtpoll_run(u->rtpoll, TRUE)) < 0) {
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goto fail;
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}
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if (ret == 0) {
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goto finish;
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}
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}
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fail:
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/* If this was no regular exit from the loop we have to continue
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* processing messages until we received PA_MESSAGE_SHUTDOWN */
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pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core),
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PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0,
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NULL, NULL);
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pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
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finish:
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pa_log_debug("Thread shutting down");
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}
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int pa__init(pa_module*m) {
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struct userdata *u = NULL;
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pa_sample_spec ss;
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pa_channel_map map;
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pa_modargs *ma = NULL;
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pa_sink_new_data data;
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size_t nbytes;
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pa_assert(m);
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if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
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pa_log("Failed to parse module arguments.");
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goto fail;
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}
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ss = m->core->default_sample_spec;
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map = m->core->default_channel_map;
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if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map,
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PA_CHANNEL_MAP_DEFAULT) < 0) {
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pa_log("Invalid sample format specification or channel map");
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goto fail;
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}
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m->userdata = u = pa_xnew0(struct userdata, 1);
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u->core = m->core;
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u->module = m;
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u->rtpoll = pa_rtpoll_new();
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pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
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pa_sink_new_data_init(&data);
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data.driver = __FILE__;
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data.module = m;
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pa_sink_new_data_set_name(&data,
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pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME));
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pa_sink_new_data_set_sample_spec(&data, &ss);
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pa_sink_new_data_set_channel_map(&data, &map);
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pa_proplist_sets(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "xrdp sink");
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pa_proplist_sets(data.proplist, PA_PROP_DEVICE_CLASS, "abstract");
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if (pa_modargs_get_proplist(ma, "sink_properties", data.proplist,
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PA_UPDATE_REPLACE) < 0) {
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pa_log("Invalid properties");
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pa_sink_new_data_done(&data);
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goto fail;
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}
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u->sink = pa_sink_new(m->core, &data,
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PA_SINK_LATENCY | PA_SINK_DYNAMIC_LATENCY);
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pa_sink_new_data_done(&data);
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if (!u->sink) {
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pa_log("Failed to create sink object.");
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goto fail;
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}
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u->sink->parent.process_msg = sink_process_msg;
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u->sink->update_requested_latency = sink_update_requested_latency_cb;
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u->sink->userdata = u;
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pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
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pa_sink_set_rtpoll(u->sink, u->rtpoll);
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u->block_usec = BLOCK_USEC;
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nbytes = pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec);
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pa_sink_set_max_rewind(u->sink, nbytes);
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pa_sink_set_max_request(u->sink, nbytes);
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u->display_num = get_display_num_from_display(getenv("DISPLAY"));
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#if defined(PA_CHECK_VERSION)
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#if PA_CHECK_VERSION(0, 9, 22)
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if (!(u->thread = pa_thread_new("xrdp-sink", thread_func, u))) {
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#else
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if (!(u->thread = pa_thread_new(thread_func, u))) {
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#endif
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#else
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if (!(u->thread = pa_thread_new(thread_func, u))) {
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#endif
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pa_log("Failed to create thread.");
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goto fail;
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}
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pa_sink_put(u->sink);
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pa_modargs_free(ma);
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return 0;
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fail:
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if (ma) {
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pa_modargs_free(ma);
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}
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pa__done(m);
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return -1;
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}
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int pa__get_n_used(pa_module *m) {
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struct userdata *u;
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pa_assert(m);
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pa_assert_se(u = m->userdata);
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return pa_sink_linked_by(u->sink);
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|
}
|
|
|
|
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);
|
|
}
|