chansrv: work on pulse sink

5 files changed, 522 insertions, 6 deletions

diff --git a/sesman/chansrv/pulse/Makefile b/sesman/chansrv/pulse/Makefile
new file mode 100644
index 00000000..f1353cdd
--- /dev/null
+++ b/sesman/chansrv/pulse/Makefile
@@ -0,0 +1,15 @@
+
+
+PULSE_DIR=/home/jay/pulseaudio-0.9.22
+
+OBJS = module-xrdp-sink.o
+
+CFLAGS = -Wall -O2 -I$(PULSE_DIR) -I$(PULSE_DIR)/src -DHAVE_CONFIG_H
+
+all: module-xrdp-sink.so
+
+module-xrdp-sink.so: $(OBJS)
+	$(CC) $(LDFLAGS) -shared -o module-xrdp-sink.so $(OBJS)
+
+clean: 
+	rm -f $(OBJS) module-xrdp-sink.so
diff --git a/sesman/chansrv/pulse/module-xrdp-sink-symdef.h b/sesman/chansrv/pulse/module-xrdp-sink-symdef.h
new file mode 100644
index 00000000..14443d31
--- /dev/null
+++ b/sesman/chansrv/pulse/module-xrdp-sink-symdef.h
@@ -0,0 +1,29 @@
+#ifndef foomodulexrdpsinksymdeffoo
+#define foomodulexrdpsinksymdeffoo
+
+#include <pulsecore/core.h>
+#include <pulsecore/module.h>
+#include <pulsecore/macro.h>
+
+#define pa__init module_xrdp_sink_LTX_pa__init
+#define pa__done module_xrdp_sink_LTX_pa__done
+#define pa__get_author module_xrdp_sink_LTX_pa__get_author
+#define pa__get_description module_xrdp_sink_LTX_pa__get_description
+#define pa__get_usage module_xrdp_sink_LTX_pa__get_usage
+#define pa__get_version module_xrdp_sink_LTX_pa__get_version
+#define pa__get_deprecated module_xrdp_sink_LTX_pa__get_deprecated
+#define pa__load_once module_xrdp_sink_LTX_pa__load_once
+#define pa__get_n_used module_xrdp_sink_LTX_pa__get_n_used
+
+int pa__init(pa_module*m);
+void pa__done(pa_module*m);
+int pa__get_n_used(pa_module*m);
+
+const char* pa__get_author(void);
+const char* pa__get_description(void);
+const char* pa__get_usage(void);
+const char* pa__get_version(void);
+const char* pa__get_deprecated(void);
+pa_bool_t pa__load_once(void);
+
+#endif
diff --git a/sesman/chansrv/pulse/module-xrdp-sink.c b/sesman/chansrv/pulse/module-xrdp-sink.c
new file mode 100644
index 00000000..b94db41c
--- /dev/null
+++ b/sesman/chansrv/pulse/module-xrdp-sink.c
@@ -0,0 +1,444 @@
+/**
+ * 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.
+ */
+
+/*
+  To stop its respawning habit, open /etc/pulse/client.conf, change
+  autospawn = yes to autospawn = no, and set daemon-binary to /bin/true.
+  Make sure these lines are uncommented, like this:
+
+autospawn = no
+daemon-binary = /bin/true 
+
+*/
+
+#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_FILE_NAME "fifo_output"
+#define DEFAULT_SINK_NAME "xrdp"
+#define BLOCK_USEC (PA_USEC_PER_SEC * 2)
+
+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;
+
+    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: {
+            pa_usec_t now;
+
+            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 data_send(struct userdata *u) {
+    char *data;
+    int bytes;
+    int sent;
+    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;
+        strcpy(s.sun_path, "/tmp/.xrdp/xrdp_chansrv_audio_socket_10");
+        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 (!(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->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);
+}
diff --git a/sesman/chansrv/pulse/pulse-notes.txt b/sesman/chansrv/pulse/pulse-notes.txt
new file mode 100644
index 00000000..4e6512c2
--- /dev/null
+++ b/sesman/chansrv/pulse/pulse-notes.txt
@@ -0,0 +1,26 @@
+
+Pulse audio notes.
+
+to see what version of PA is on your machine
+pulseaudio --version
+
+
+
+To build xrdp pulse sink,
+get the pulse source that most closely matches your version on
+your machine.  Get the source from 
+http://freedesktop.org/software/pulseaudio/releases/
+run ./configure after extracting.  I don't think you need to build it.
+edit Makefile to point to your pulse source directory.
+
+
+
+PA always respawning
+
+  To stop its respawning habit, open /etc/pulse/client.conf, change
+  autospawn = yes to autospawn = no, and set daemon-binary to /bin/true.
+  Make sure these lines are uncommented, like this:
+
+autospawn = no
+daemon-binary = /bin/true 
+
diff --git a/sesman/chansrv/sound.c b/sesman/chansrv/sound.c
index e8b801c6..6bfa45e1 100644
--- a/sesman/chansrv/sound.c
+++ b/sesman/chansrv/sound.c
@@ -167,7 +167,7 @@ sound_send_wave_data(char *data, int data_bytes)
 
     print_got_here();
 
-    if ((data_bytes < 4) || (data_bytes > 32 * 1024))
+    if ((data_bytes < 4) || (data_bytes > 128 * 1024))
     {
         LOG(0, ("sound_send_wave_data: bad data_bytes %d", data_bytes));
     }
@@ -249,7 +249,7 @@ process_pcm_message(int id, int size, struct stream *s)
 {
     print_got_here();
 
-    sound_send_wave_data(s->p, size);
+    //sound_send_wave_data(s->p, size);
     return 0;
 }
 
@@ -277,11 +277,12 @@ sound_trans_audio_data_in(struct trans *trans)
     in_uint32_le(s, id);
     in_uint32_le(s, size);
 
-    if ((id != 0) || (size > 32 * 1024 + 8) || (size < 1))
+    if ((id != 0) || (size > 128 * 1024 + 8) || (size < 8))
     {
         LOG(0, ("sound_trans_audio_data_in: bad message id %d size %d", id, size));
         return 1;
     }
+    LOG(0, ("sound_trans_audio_data_in: good message id %d size %d", id, size));
 
     error = trans_force_read(trans, size - 8);
 
@@ -298,6 +299,7 @@ sound_trans_audio_data_in(struct trans *trans)
 static int DEFAULT_CC
 sound_trans_audio_conn_in(struct trans *trans, struct trans *new_trans)
 {
+    LOG(0, ("sound_trans_audio_conn_in:"));
     print_got_here();
 
     if (trans == 0)
@@ -339,8 +341,8 @@ sound_init(void)
     LOG(0, ("sound_init:"));
 
     sound_send_server_formats();
-    g_audio_l_trans = trans_create(2, 33 * 1024, 8192);
-    g_snprintf(port, 255, "/tmp/xrdp_chansrv_audio_socket_%d", g_display_num);
+    g_audio_l_trans = trans_create(2, 128 * 1024, 8192);
+    g_snprintf(port, 255, "/tmp/.xrdp/xrdp_chansrv_audio_socket_%d", g_display_num);
     g_audio_l_trans->trans_conn_in = sound_trans_audio_conn_in;
     error = trans_listen(g_audio_l_trans, port);
 
@@ -374,7 +376,7 @@ sound_deinit(void)
     if (g_audio_c_trans != 0)
     {
         trans_delete(g_audio_c_trans);
-        g_audio_l_trans = 0;
+        g_audio_c_trans = 0;
     }
 
     return 0;