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xrdp-proprietary/sesman/chansrv/pulse/module-xrdp-source.c

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/***
This file is part of PulseAudio.
Copyright 2004-2008 Lennart Poettering
Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
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 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 <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <pulse/rtclock.h>
#include <pulse/timeval.h>
#include <pulse/xmalloc.h>
#include <pulsecore/core-util.h>
#include <pulsecore/log.h>
#include <pulsecore/macro.h>
#include <pulsecore/modargs.h>
#include <pulsecore/module.h>
#include <pulsecore/rtpoll.h>
#include <pulsecore/source.h>
#include <pulsecore/thread-mq.h>
#include <pulsecore/thread.h>
/* defined in pulse/version.h */
#if PA_PROTOCOL_VERSION > 28
/* these used to be defined in pulsecore/macro.h */
typedef bool pa_bool_t;
#define FALSE ((pa_bool_t) 0)
#define TRUE (!FALSE)
#else
#endif
#include "module-xrdp-source-symdef.h"
PA_MODULE_AUTHOR("Laxmikant Rashinkar");
PA_MODULE_DESCRIPTION("xrdp source");
PA_MODULE_VERSION(PACKAGE_VERSION);
PA_MODULE_LOAD_ONCE(FALSE);
PA_MODULE_USAGE(
"format=<sample format> "
"channels=<number of channels> "
"rate=<sample rate> "
"source_name=<name of source> "
"channel_map=<channel map> "
"description=<description for the source> "
"latency_time=<latency time in ms>");
#define DEFAULT_SOURCE_NAME "xrdp-source"
#define DEFAULT_LATENCY_TIME 10
#define MAX_LATENCY_USEC 1000
#define CHANSRV_PORT_STR "/tmp/.xrdp/xrdp_chansrv_audio_in_socket_%d"
struct userdata {
pa_core *core;
pa_module *module;
pa_source *source;
pa_thread *thread;
pa_thread_mq thread_mq;
pa_rtpoll *rtpoll;
size_t block_size;
pa_usec_t block_usec;
pa_usec_t timestamp;
pa_usec_t latency_time;
/* xrdp stuff */
int fd; /* UDS connection to xrdp chansrv */
int display_num; /* X display number */
int want_src_data;
};
static const char* const valid_modargs[] = {
"rate",
"format",
"channels",
"source_name",
"channel_map",
"description",
"latency_time",
NULL
};
static int get_display_num_from_display(char *display_text) ;
static int source_process_msg(pa_msgobject *o, int code, void *data,
int64_t offset, pa_memchunk *chunk) {
struct userdata *u = PA_SOURCE(o)->userdata;
switch (code) {
case PA_SOURCE_MESSAGE_SET_STATE:
if (PA_PTR_TO_UINT(data) == PA_SOURCE_RUNNING)
u->timestamp = pa_rtclock_now();
break;
case PA_SOURCE_MESSAGE_GET_LATENCY: {
pa_usec_t now;
now = pa_rtclock_now();
*((pa_usec_t*) data) = u->timestamp > now ? u->timestamp - now : 0;
return 0;
}
}
return pa_source_process_msg(o, code, data, offset, chunk);
}
static void source_update_requested_latency_cb(pa_source *s) {
struct userdata *u;
pa_source_assert_ref(s);
u = s->userdata;
pa_assert(u);
u->block_usec = pa_source_get_requested_latency_within_thread(s);
}
static int lsend(int fd, char *data, int bytes) {
int sent = 0;
int error;
while (sent < bytes) {
error = send(fd, data + sent, bytes - sent, 0);
if (error < 1) {
return error;
}
sent += error;
}
return sent;
}
static int lrecv(int fd, char *data, int bytes) {
int recved = 0;
int error;
while (recved < bytes) {
error = recv(fd, data + recved, bytes - recved, 0);
if (error < 1) {
return error;
}
recved += error;
}
return recved;
}
static int data_get(struct userdata *u, pa_memchunk *chunk) {
int fd;
int bytes;
int read_bytes;
struct sockaddr_un s;
char *data;
char buf[11];
unsigned char ubuf[10];
if (u->fd == 0) {
/* connect to xrdp unix domain socket */
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 connect to %s", s.sun_path);
if (connect(fd, (struct sockaddr *) &s, sizeof(struct sockaddr_un)) != 0) {
pa_log_debug("Connect failed");
close(fd);
return -1;
}
pa_log("Connected ok, fd=%d", fd);
pa_log_debug("###### connected to xrdp audio_in socket");
u->fd = fd;
}
data = (char *) pa_memblock_acquire(chunk->memblock);
if (!u->want_src_data) {
char buf[12];
buf[0] = 0;
buf[1] = 0;
buf[2] = 0;
buf[3] = 0;
buf[4] = 11;
buf[5] = 0;
buf[6] = 0;
buf[7] = 0;
buf[8] = 1;
buf[9] = 0;
buf[10] = 0;
if (lsend(u->fd, buf, 11) != 11) {
close(u->fd);
u->fd = 0;
pa_memblock_release(chunk->memblock);
return -1;
}
u->want_src_data = 1;
pa_log_debug("###### started recording");
}
/* ask for more data */
buf[0] = 0;
buf[1] = 0;
buf[2] = 0;
buf[3] = 0;
buf[4] = 11;
buf[5] = 0;
buf[6] = 0;
buf[7] = 0;
buf[8] = 3;
buf[9] = (unsigned char) chunk->length;
buf[10] = (unsigned char) ((chunk->length >> 8) & 0xff);
if (lsend(u->fd, buf, 11) != 11) {
close(u->fd);
u->fd = 0;
pa_memblock_release(chunk->memblock);
u->want_src_data = 0;
return -1;
}
/* read length of data available */
if (lrecv(u->fd, (char *) ubuf, 2) != 2) {
close(u->fd);
u->fd = 0;
pa_memblock_release(chunk->memblock);
u->want_src_data = 0;
return -1;
}
bytes = ((ubuf[1] << 8) & 0xff00) | (ubuf[0] & 0xff);
if (bytes == 0) {
pa_memblock_release(chunk->memblock);
return 0;
}
/* get data */
read_bytes = lrecv(u->fd, data, bytes);
if (read_bytes != bytes) {
close(u->fd);
u->fd = 0;
pa_memblock_release(chunk->memblock);
u->want_src_data = 0;
return -1;
}
pa_memblock_release(chunk->memblock);
return read_bytes;
}
static void thread_func(void *userdata) {
struct userdata *u = userdata;
int bytes;
pa_assert(u);
pa_thread_mq_install(&u->thread_mq);
u->timestamp = pa_rtclock_now();
for (;;) {
int ret;
/* Generate some null data */
if (u->source->thread_info.state == PA_SOURCE_RUNNING) {
pa_usec_t now;
pa_memchunk chunk;
now = pa_rtclock_now();
if ((chunk.length = pa_usec_to_bytes(now - u->timestamp, &u->source->sample_spec)) > 0) {
chunk.length *= 4;
chunk.memblock = pa_memblock_new(u->core->mempool, chunk.length);
chunk.index = 0;
bytes = data_get(u, &chunk);
if (bytes > 0)
{
chunk.length = bytes;
pa_source_post(u->source, &chunk);
}
pa_memblock_unref(chunk.memblock);
u->timestamp = now;
}
pa_rtpoll_set_timer_absolute(u->rtpoll, u->timestamp + u->latency_time * PA_USEC_PER_MSEC);
} else {
if (u->want_src_data)
{
/* we dont want source data anymore */
char buf[12];
buf[0] = 0;
buf[1] = 0;
buf[2] = 0;
buf[3] = 0;
buf[4] = 11;
buf[5] = 0;
buf[6] = 0;
buf[7] = 0;
buf[8] = 2;
buf[9] = 0;
buf[10] = 0;
if (lsend(u->fd, buf, 11) != 11) {
close(u->fd);
u->fd = 0;
}
u->want_src_data = 0;
pa_log_debug("###### stopped recording");
}
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_source_new_data data;
uint32_t latency_time = DEFAULT_LATENCY_TIME;
pa_assert(m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log("Failed to parse module arguments.");
goto fail;
}
#if 1
ss = m->core->default_sample_spec;
#else
ss.format = PA_SAMPLE_S16LE;
ss.rate = 22050;
ss.channels = 2;
#endif
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_source_new_data_init(&data);
data.driver = __FILE__;
data.module = m;
pa_source_new_data_set_name(&data, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME));
pa_source_new_data_set_sample_spec(&data, &ss);
pa_source_new_data_set_channel_map(&data, &map);
pa_proplist_sets(data.proplist, PA_PROP_DEVICE_DESCRIPTION, pa_modargs_get_value(ma, "description", "xrdp source"));
pa_proplist_sets(data.proplist, PA_PROP_DEVICE_CLASS, "abstract");
u->source = pa_source_new(m->core, &data, PA_SOURCE_LATENCY | PA_SOURCE_DYNAMIC_LATENCY);
pa_source_new_data_done(&data);
if (!u->source) {
pa_log("Failed to create source object.");
goto fail;
}
u->latency_time = DEFAULT_LATENCY_TIME;
if (pa_modargs_get_value_u32(ma, "latency_time", &latency_time) < 0) {
pa_log("Failed to parse latency_time value.");
goto fail;
}
u->latency_time = latency_time;
u->source->parent.process_msg = source_process_msg;
u->source->update_requested_latency = source_update_requested_latency_cb;
u->source->userdata = u;
pa_source_set_asyncmsgq(u->source, u->thread_mq.inq);
pa_source_set_rtpoll(u->source, u->rtpoll);
pa_source_set_latency_range(u->source, 0, MAX_LATENCY_USEC);
u->block_usec = u->source->thread_info.max_latency;
u->source->thread_info.max_rewind =
pa_usec_to_bytes(u->block_usec, &u->source->sample_spec);
#if defined(PA_CHECK_VERSION)
#if PA_CHECK_VERSION(0, 9, 22)
if (!(u->thread = pa_thread_new("xrdp-source", 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_source_put(u->source);
pa_modargs_free(ma);
u->display_num = get_display_num_from_display(getenv("DISPLAY"));
return 0;
fail:
if (ma)
pa_modargs_free(ma);
pa__done(m);
return -1;
}
void pa__done(pa_module*m) {
struct userdata *u;
pa_assert(m);
if (!(u = m->userdata))
return;
if (u->source)
pa_source_unlink(u->source);
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->source)
pa_source_unref(u->source);
if (u->rtpoll)
pa_rtpoll_free(u->rtpoll);
pa_xfree(u);
}
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];
if (display_text == NULL) {
return 0;
}
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;
}
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