#include <stdlib.h>
#include <sys/stat.h>
#include <stdio.h>
-#include <assert.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <limits.h>
+#include <sys/poll.h>
#include <pulse/xmalloc.h>
#include <pulsecore/core-error.h>
-#include <pulsecore/iochannel.h>
#include <pulsecore/source.h>
#include <pulsecore/module.h>
#include <pulsecore/core-util.h>
#include <pulsecore/modargs.h>
#include <pulsecore/log.h>
+#include <pulsecore/thread.h>
#include "module-pipe-source-symdef.h"
"rate=<sample rate> "
"channel_map=<channel map>")
-#define DEFAULT_FIFO_NAME "/tmp/music.input"
+#define DEFAULT_FILE_NAME "/tmp/music.input"
#define DEFAULT_SOURCE_NAME "fifo_input"
struct userdata {
pa_core *core;
-
+ pa_module *module;
+ pa_source *source;
+ pa_thread *thread;
+ pa_asyncmsgq *asyncmsgq;
+
char *filename;
+ int fd;
- pa_source *source;
- pa_iochannel *io;
- pa_module *module;
- pa_memchunk chunk;
+ pa_memchunk memchunk;
};
static const char* const valid_modargs[] = {
NULL
};
-static void do_read(struct userdata *u) {
- ssize_t r;
- void *p;
- pa_memchunk chunk;
-
- assert(u);
-
- if (!pa_iochannel_is_readable(u->io))
- return;
-
- pa_module_set_used(u->module, pa_idxset_size(u->source->outputs));
-
- if (!u->chunk.memblock) {
- u->chunk.memblock = pa_memblock_new(u->core->mempool, PIPE_BUF);
- u->chunk.index = chunk.length = 0;
- }
-
- assert(u->chunk.memblock);
- assert(pa_memblock_get_length(u->chunk.memblock) > u->chunk.index);
-
- p = pa_memblock_acquire(u->chunk.memblock);
- if ((r = pa_iochannel_read(u->io, (uint8_t*) p + u->chunk.index, pa_memblock_get_length(u->chunk.memblock) - u->chunk.index)) <= 0) {
- pa_memblock_release(u->chunk.memblock);
- pa_log("read(): %s", pa_cstrerror(errno));
- return;
+static void thread_func(void *userdata) {
+ enum {
+ POLLFD_ASYNCQ,
+ POLLFD_FIFO,
+ POLLFD_MAX,
+ };
+
+ struct userdata *u = userdata;
+ struct pollfd pollfd[POLLFD_MAX];
+ int read_type = 0;
+
+ pa_assert(u);
+
+ pa_log_debug("Thread starting up");
+
+ pa_memchunk_reset(&u->memchunk);
+
+ memset(&pollfd, 0, sizeof(pollfd));
+
+ pollfd[POLLFD_ASYNCQ].fd = pa_asyncmsgq_get_fd(u->asyncmsgq);
+ pollfd[POLLFD_ASYNCQ].events = POLLIN;
+ pollfd[POLLFD_FIFO].fd = u->fd;
+
+ for (;;) {
+ pa_msgobject *object;
+ int code;
+ void *data;
+ pa_memchunk chunk;
+ int r;
+
+ /* Check whether there is a message for us to process */
+ if (pa_asyncmsgq_get(u->asyncmsgq, &object, &code, &data, &chunk, 0) == 0) {
+ int ret;
+
+ if (!object && code == PA_MESSAGE_SHUTDOWN) {
+ pa_asyncmsgq_done(u->asyncmsgq, 0);
+ goto finish;
+ }
+
+ ret = pa_asyncmsgq_dispatch(object, code, data, &chunk);
+ pa_asyncmsgq_done(u->asyncmsgq, ret);
+ continue;
+ }
+
+ /* Render some data and write it to the fifo */
+
+ if (u->source->thread_info.state == PA_SOURCE_RUNNING && pollfd[POLLFD_FIFO].revents) {
+ void *p;
+ ssize_t l;
+
+ if (!u->memchunk.memblock) {
+ u->memchunk.memblock = pa_memblock_new(u->core->mempool, PIPE_BUF);
+ u->memchunk.index = u->memchunk.length = 0;
+ }
+
+ pa_assert(pa_memblock_get_length(u->memchunk.memblock) > u->memchunk.index);
+
+ p = pa_memblock_acquire(u->memchunk.memblock);
+ l = pa_read(u->fd, (uint8_t*) p + u->memchunk.index, pa_memblock_get_length(u->memchunk.memblock) - u->memchunk.index, &read_type);
+ pa_memblock_release(u->memchunk.memblock);
+
+ pa_assert(l != 0); /* EOF cannot happen, since we opened the fifo for both reading and writing */
+
+ if (l < 0) {
+
+ if (errno == EINTR)
+ continue;
+ else if (errno != EAGAIN) {
+ pa_log("Faile to read data from FIFO: %s", pa_cstrerror(errno));
+ goto fail;
+ }
+
+ } else {
+
+ u->memchunk.length = l;
+ pa_source_post(u->source, &u->memchunk);
+ u->memchunk.index += l;
+
+ if (u->memchunk.index >= pa_memblock_get_length(u->memchunk.memblock)) {
+ pa_memblock_unref(u->memchunk.memblock);
+ pa_memchunk_reset(&u->memchunk);
+ }
+
+ pollfd[POLLFD_FIFO].revents = 0;
+ continue;
+ }
+ }
+
+ pollfd[POLLFD_FIFO].events = u->source->thread_info.state == PA_SINK_RUNNING ? POLLIN : 0;
+
+ /* Hmm, nothing to do. Let's sleep */
+
+ if (pa_asyncmsgq_before_poll(u->asyncmsgq) < 0)
+ continue;
+
+/* pa_log("polling for %i", pollfd[POLLFD_FIFO].events); */
+ r = poll(pollfd, POLLFD_MAX, -1);
+/* pa_log("polling got %i (r=%i) %i", r > 0 ? pollfd[POLLFD_FIFO].revents : 0, r, r > 0 ? pollfd[POLLFD_ASYNCQ].revents: 0); */
+
+ pa_asyncmsgq_after_poll(u->asyncmsgq);
+
+ if (r < 0) {
+ if (errno == EINTR)
+ continue;
+
+ pa_log("poll() failed: %s", pa_cstrerror(errno));
+ goto fail;
+ }
+
+ if (pollfd[POLLFD_FIFO].revents & ~POLLIN) {
+ pa_log("FIFO shutdown.");
+ goto fail;
+ }
+
+ pa_assert((pollfd[POLLFD_ASYNCQ].revents & ~POLLIN) == 0);
}
- pa_memblock_release(u->chunk.memblock);
-
- u->chunk.length = r;
- pa_source_post(u->source, &u->chunk);
- u->chunk.index += r;
- if (u->chunk.index >= pa_memblock_get_length(u->chunk.memblock)) {
- u->chunk.index = u->chunk.length = 0;
- pa_memblock_unref(u->chunk.memblock);
- u->chunk.memblock = NULL;
- }
-}
+fail:
+ /* We have to continue processing messages until we receive the
+ * SHUTDOWN message */
+ pa_asyncmsgq_post(u->core->asyncmsgq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, NULL, NULL);
+ pa_asyncmsgq_wait_for(u->asyncmsgq, PA_MESSAGE_SHUTDOWN);
-static void io_callback(PA_GCC_UNUSED pa_iochannel *io, void*userdata) {
- struct userdata *u = userdata;
- assert(u);
- do_read(u);
+finish:
+ pa_log_debug("Thread shutting down");
}
int pa__init(pa_core *c, pa_module*m) {
- struct userdata *u = NULL;
+ struct userdata *u;
struct stat st;
- const char *p;
- int fd = -1;
pa_sample_spec ss;
pa_channel_map map;
- pa_modargs *ma = NULL;
+ pa_modargs *ma;
char *t;
- assert(c && m);
+ pa_assert(c);
+ pa_assert(m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
- pa_log("failed to parse module arguments");
+ pa_log("failed to parse module arguments.");
goto fail;
}
goto fail;
}
- mkfifo(p = pa_modargs_get_value(ma, "file", DEFAULT_FIFO_NAME), 0777);
+ u = pa_xnew0(struct userdata, 1);
+ u->core = c;
+ u->module = m;
+ m->userdata = u;
- if ((fd = open(p, O_RDWR)) < 0) {
- pa_log("open('%s'): %s", p, pa_cstrerror(errno));
+ pa_assert_se(u->asyncmsgq = pa_asyncmsgq_new(0));
+
+ u->filename = pa_xstrdup(pa_modargs_get_value(ma, "file", DEFAULT_FILE_NAME));
+
+ mkfifo(u->filename, 0666);
+ if ((u->fd = open(u->filename, O_RDWR|O_NOCTTY)) < 0) {
+ pa_log("open('%s'): %s", u->filename, pa_cstrerror(errno));
goto fail;
}
- pa_fd_set_cloexec(fd, 1);
+ pa_fd_set_cloexec(u->fd, 1);
+ pa_make_nonblock_fd(u->fd);
- if (fstat(fd, &st) < 0) {
- pa_log("fstat('%s'): %s", p, pa_cstrerror(errno));
+ if (fstat(u->fd, &st) < 0) {
+ pa_log("fstat('%s'): %s",u->filename, pa_cstrerror(errno));
goto fail;
}
if (!S_ISFIFO(st.st_mode)) {
- pa_log("'%s' is not a FIFO.", p);
+ pa_log("'%s' is not a FIFO.", u->filename);
goto fail;
}
- u = pa_xmalloc0(sizeof(struct userdata));
-
- u->filename = pa_xstrdup(p);
- u->core = c;
-
if (!(u->source = pa_source_new(c, __FILE__, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss, &map))) {
- pa_log("failed to create source.");
+ pa_log("Failed to create source.");
goto fail;
}
+
u->source->userdata = u;
+
pa_source_set_module(u->source, m);
- pa_source_set_description(u->source, t = pa_sprintf_malloc("Unix FIFO source '%s'", p));
+ pa_source_set_asyncmsgq(u->source, u->asyncmsgq);
+ pa_source_set_description(u->source, t = pa_sprintf_malloc("Unix FIFO source '%s'", u->filename));
pa_xfree(t);
- u->io = pa_iochannel_new(c->mainloop, fd, -1);
- assert(u->io);
- pa_iochannel_set_callback(u->io, io_callback, u);
-
- u->chunk.memblock = NULL;
- u->chunk.index = u->chunk.length = 0;
-
- u->module = m;
- m->userdata = u;
+ if (!(u->thread = pa_thread_new(thread_func, u))) {
+ pa_log("Failed to create thread.");
+ goto fail;
+ }
pa_modargs_free(ma);
if (ma)
pa_modargs_free(ma);
- if (fd >= 0)
- close(fd);
-
pa__done(c, m);
return -1;
void pa__done(pa_core *c, pa_module*m) {
struct userdata *u;
- assert(c && m);
+
+ pa_assert(c);
+ pa_assert(m);
if (!(u = m->userdata))
return;
- if (u->chunk.memblock)
- pa_memblock_unref(u->chunk.memblock);
+ if (u->source)
+ pa_source_disconnect(u->source);
- pa_source_disconnect(u->source);
- pa_source_unref(u->source);
- pa_iochannel_free(u->io);
+ if (u->thread) {
+ pa_asyncmsgq_send(u->asyncmsgq, NULL, PA_MESSAGE_SHUTDOWN, NULL, NULL);
+ pa_thread_free(u->thread);
+ }
+
+ if (u->asyncmsgq)
+ pa_asyncmsgq_free(u->asyncmsgq);
+
+ if (u->source)
+ pa_source_unref(u->source);
+
+ if (u->memchunk.memblock)
+ pa_memblock_unref(u->memchunk.memblock);
+
+ if (u->filename) {
+ unlink(u->filename);
+ pa_xfree(u->filename);
+ }
- assert(u->filename);
- unlink(u->filename);
- pa_xfree(u->filename);
+ if (u->fd >= 0)
+ close(u->fd);
pa_xfree(u);
}