1 files changed, 494 insertions, 0 deletions
diff --git a/sesman/chansrv/pulse/module-xrdp-sink.c b/sesman/chansrv/pulse/module-xrdp-sink.c
new file mode 100644
index 00000000..b062b299
--- /dev/null
+++ b/sesman/chansrv/pulse/module-xrdp-sink.c
@@ -0,0 +1,494 @@
+/**
+ * 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;
+
+    int fd; /* unix domain socket connection to chansrv */
+    pa_memchunk memchunk;
+
+};
+
+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;
+
+    //pa_log("sink_process_msg: code %d", code);
+
+    switch (code) {
+        case PA_SINK_MESSAGE_SET_STATE:
+
+            if (PA_PTR_TO_UINT(data) == PA_SINK_RUNNING) {
+                u->timestamp = pa_rtclock_now();
+            }
+
+            break;
+
+        case PA_SINK_MESSAGE_GET_LATENCY:
+
+            now = pa_rtclock_now();
+            *((pa_usec_t*) data) = u->timestamp > now ? u->timestamp - now : 0ULL;
+
+            return 0;
+    }
+
+    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);
+
+    if (u->block_usec == (pa_usec_t) -1)
+        u->block_usec = s->thread_info.max_latency;
+
+    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);
+
+    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) {
+    char *data;
+    int bytes;
+    int sent;
+    int display_num;
+    struct header h;
+
+    if (u->fd == 0) {
+        int fd = socket(PF_LOCAL, SOCK_STREAM, 0);
+        struct sockaddr_un s = { 0 };
+        s.sun_family = AF_UNIX;
+        display_num = get_display_num_from_display(getenv("DISPLAY"));
+        bytes = sizeof(s.sun_path) - 1;
+        snprintf(s.sun_path, bytes, CHANSRV_PORT_STR, display_num);
+        if (connect(fd, (struct sockaddr *)&s,
+                    sizeof(struct sockaddr_un)) != 0) {
+            //pa_log("Connected failed");
+            close(fd);
+            return 0;
+        }
+        u->fd = fd;
+        pa_log("Connected ok fd %d", fd);
+    }
+
+    bytes = u->memchunk.length;
+    pa_log("bytes %d", 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(u->memchunk.memblock);
+    data += u->memchunk.index;
+    sent = send(u->fd, data, bytes, 0);
+    pa_memblock_release(u->memchunk.memblock);
+
+    if (sent != bytes) {
+        pa_log("data_send: send failed sent %d bytes %d", sent, bytes);
+        close(u->fd);
+        u->fd = 0;
+        return 0;
+    }
+
+    u->memchunk.index += sent;
+    u->memchunk.length -= sent;
+
+    if (u->memchunk.length <= 0) {
+        pa_memblock_unref(u->memchunk.memblock);
+        pa_memchunk_reset(&u->memchunk);
+    }
+
+    return sent;
+}
+
+static void process_render(struct userdata *u, pa_usec_t now) {
+
+    //pa_log("%d", u->memchunk.length);
+
+    //pa_log("a");
+
+    //if (u->memchunk.length <= 0)
+        pa_sink_render(u->sink, 8192, &u->memchunk);
+
+    //pa_log("b");
+    //data_send(u);
+    //pa_log("c");
+
+}
+
+static void thread_func(void *userdata) {
+    struct userdata *u = userdata;
+
+    pa_assert(u);
+
+    pa_log_debug("Thread starting up");
+
+    pa_thread_mq_install(&u->thread_mq);
+
+    u->timestamp = pa_rtclock_now();
+
+    for (;;) {
+        int ret;
+
+        /* Render some data and drop it immediately */
+        if (PA_SINK_IS_OPENED(u->sink->thread_info.state)) {
+            pa_usec_t now;
+
+            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);
+
+        /* Hmm, nothing to do. Let's sleep */
+        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);
+
+    pa_memchunk_reset(&u->memchunk);
+
+#if defined(PA_CHECK_VERSION) && (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
+        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->memchunk.memblock)
+        pa_memblock_unref(u->memchunk.memblock);
+
+    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);
+}