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#include <polyp/mainloop.h>
static pthread_cond_t request_cond = PTHREAD_COND_INITIALIZER;
static pthread_mutex_t request_mutex = PTHREAD_MUTEX_INITIALIZER;
struct request {
enum { MESSAGE_OPEN, MESSAGE_CLOSE, MESSAGE_WRITE, MESSAGE_FLUSH, MESSAGE_PAUSE } type;
void *data;
struct pa_sample_spec ss;
size_t length;
int success, done;
};
static struct request* current_request = NULL;
static int pipe_fds[2] = { -1, -1};
static pthread_t thread_id;
static int thread_running = 0;
static struct pa_context *context = NULL;
static struct pa_stream *stream = NULL;
static struct pa_mainloop_api *mainloop_api = NULL;
static int failed = 0;
static void finish_request(int success) {
failed = 1;
pthread_mutex_lock(&request_mutex);
if (current_request) {
current_request->done = 1;
current_request->success = success;
pthread_cond_signal(&request_cond);
}
pthread_mutex_unlock(&request_mutex);
}
static void stream_state_callback(struct pa_stream *s, void *userdata) {
assert(stream == s);
switch(pa_stream_get_state(c)) {
case PA_STREAM_CREATING:
break;
case PA_STREAM_READY:
assert(current_request && current_request->type == MESSAGE_OPEN);
finish_request(1);
break;
default:
finish_request(0);
}
}
static void context_state_callback(struct pa_context *c, void *userdata) {
assert(c == context);
switch (pa_context_get_state(c)) {
case PA_CONTEXT_CONNECTING:
case PA_CONTEXT_AUTHORIZING:
case PA_CONTEXT_SETTING_NAME:
break;
case PA_CONTEXT_READY :
assert(!stream && current_request);
stream = pa_stream_new(c, ¤t_request->ss);
assert(stream);
pa_stream_set_state(stream, stream_state_callback);
pa_stream_connect_playback(stream, NULL, NULL);
break;
default:
finish_request(0);
}
}
static void context_drain_callback(struct pa_context *c, void *userdata) {
assert(c == context);
mainloop_api->quit(mainloop_api, 0);
}
static void request_func(struct pa_mainloop*api, struct pa_io_event *io, enum pa_io_event_flags f, void *userdata) {
char x;
assert(api && io && f == PA_IO_EVENT_INPUT);
read(pipe_fds[0], &x, 1);
pthread_mutex_lock(&request_mutex);
if (current_request) {
if (failed) {
fail();
} else {
switch (current_request->type) {
case MESSAGE_OPEN:
assert(!context && !stream);
context = pa_context_new(api, "xmms");
assert(context);
pa_context_set_state_callback(context, context_state_callback, NULL);
pa_context_connect(context, NULL);
break;
case MESSAGE_CLOSE: {
struct pa_operation *o;
assert(context);
if ((o = pa_context_drain(context, context_drain_callback, NULL)))
pa_operation_unref(o);
else
api->quit(mainloop_api, 0);
break;
}
case MESSAGE_WRITE:
assert(context && stream && current_request->data && current_request->length > 0);
pa_stream_write(stream, current_request->data, current_request->length, free, 0);
break;
case MESSAGE_FLUSH:
assert(context && stream);
pa_stream_flush
}
}
}
pthread_mutex_unlock(&request_mutex);
}
static void* thread_func(void *t) {
struct pa_mainloop *m;
struct pa_io_event *io;
assert(pipe_fds[0] >= 0 && !mainloop_api);
failed = 0;
m = pa_mainloop_new();
assert(m);
mainloop_api = pa_mainloop_get_api(m);
assert(mainloop_api);
io = mainloop_api->io_new(mainloop_api, pipe_fds[0], PA_IO_EVENT_INPUT, &request_func, NULL);
assert(io);
pa_mainloop_run(m, NULL);
api->io_free(io);
pa_mainloop_free(m);
mainloop_api = NULL;
return NULL;
}
static void start_thread(void) {
int r;
assert(!thread_running);
r = pipe(pipe_fds);
assert(r >= 0 && pipe_fds[0] >= 0 && pipe_fds[1] >= 0);
current_request = NULL;
r = pthread_create(&thread_id, NULL, thread_func, NULL);
assert(!r);
}
static void stop_thread(void) {
struct request req;
assert(thread_running);
pthread_join(thread_id, NULL);
thread_running = 0;
assert(!current_request);
close(pipe_fds[0]);
close(pipe_fds[1]);
pipe_fds[0] = pipe_fds[1] = -1;
}
void request_execute(struct request *r) {
char x = 'x';
assert(r);
r->success = r->done = 0;
pthread_mutex_lock(&request_mutex);
assert(!current_request);
current_request = r;
assert(pipe_fds[1] >= 0);
write(pipe_fds[1], &x, sizeof(x));
while (!r->done)
pthread_cond_wait(&request_cond, &request_mutex);
current_request = NULL;
pthread_mutex_unlock(&request_mutex);
}
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