*
* This program is responsible for transmitting a single coherent audio stream
* to its destination (over the network, to some sound API, to some
- * subprocess). It receives connections from decoders via file descriptor
- * passing from the main server and plays them in the right order.
+ * subprocess). It receives connections from decoders (or rather from the
+ * process that is about to become disorder-normalize) and plays them in the
+ * right order.
*
* @b Encodings. For the <a href="http://www.alsa-project.org/">ALSA</a> API,
* 8- and 16- bit stereo and mono are supported, with any sample rate (within
#include <time.h>
#include <fcntl.h>
#include <poll.h>
+#include <sys/un.h>
#include "configuration.h"
#include "syscalls.h"
/** @brief Next free slot in @ref fds */
int fdno;
+/** @brief Listen socket */
+static int listenfd;
+
static time_t last_report; /* when we last reported */
static int paused; /* pause status */
free(t);
}
-/** @brief Notice a new connection */
-static void acquire(struct track *t, int fd) {
- D(("acquire %s %d", t->id, fd));
- if(t->fd != -1)
- xclose(t->fd);
- t->fd = fd;
- nonblock(fd);
-}
-
/** @brief Read data into a sample buffer
* @param t Pointer to track
* @return 0 on success, -1 on EOF
memset(&sm, 0, sizeof sm);
sm.type = SM_FINISHED;
strcpy(sm.id, playing->id);
- speaker_send(1, &sm, 0);
+ speaker_send(1, &sm);
removetrack(playing->id);
destroy(playing);
playing = 0;
sm.type = paused ? SM_PAUSED : SM_PLAYING;
strcpy(sm.id, playing->id);
sm.data = playing->played / config->sample_format.rate;
- speaker_send(1, &sm, 0);
+ speaker_send(1, &sm);
}
time(&last_report);
}
/** @brief Table of speaker backends */
static const struct speaker_backend *backends[] = {
-#if API_ALSA
+#if HAVE_ALSA_ASOUNDLIB_H
&alsa_backend,
#endif
&command_backend,
&network_backend,
+#if HAVE_COREAUDIO_AUDIOHARDWARE_H
+ &coreaudio_backend,
+#endif
+#if HAVE_SYS_SOUNDCARD_H
+ &oss_backend,
+#endif
0
};
static void mainloop(void) {
struct track *t;
struct speaker_message sm;
- int n, fd, stdin_slot, timeout;
+ int n, fd, stdin_slot, timeout, listen_slot;
while(getppid() != 1) {
fdno = 0;
timeout = 1000;
/* Always ready for commands from the main server. */
stdin_slot = addfd(0, POLLIN);
+ /* Also always ready for inbound connections */
+ listen_slot = addfd(listenfd, POLLIN);
/* Try to read sample data for the currently playing track if there is
* buffer space. */
- if(playing && !playing->eof && playing->used < (sizeof playing->buffer))
+ if(playing
+ && playing->fd >= 0
+ && !playing->eof
+ && playing->used < (sizeof playing->buffer))
playing->slot = addfd(playing->fd, POLLIN);
else if(playing)
playing->slot = -1;
* instead, but the post-poll code will cope even if it's
* device_closed. */
if(device_state == device_open)
- backend->beforepoll();
+ backend->beforepoll(&timeout);
}
/* If any other tracks don't have a full buffer, try to read sample data
* from them. We do this last of all, so that if we run out of slots,
* nothing important can't be monitored. */
for(t = tracks; t; t = t->next)
if(t != playing) {
- if(!t->eof && t->used < sizeof t->buffer) {
+ if(t->fd >= 0
+ && !t->eof
+ && t->used < sizeof t->buffer) {
t->slot = addfd(t->fd, POLLIN | POLLHUP);
} else
t->slot = -1;
play(3 * FRAMES);
}
}
+ /* Perhaps a connection has arrived */
+ if(fds[listen_slot].revents & POLLIN) {
+ struct sockaddr_un addr;
+ socklen_t addrlen = sizeof addr;
+ uint32_t l;
+ char id[24];
+
+ if((fd = accept(listenfd, (struct sockaddr *)&addr, &addrlen)) >= 0) {
+ blocking(fd);
+ if(read(fd, &l, sizeof l) < 4) {
+ error(errno, "reading length from inbound connection");
+ xclose(fd);
+ } else if(l >= sizeof id) {
+ error(0, "id length too long");
+ xclose(fd);
+ } else if(read(fd, id, l) < (ssize_t)l) {
+ error(errno, "reading id from inbound connection");
+ xclose(fd);
+ } else {
+ id[l] = 0;
+ D(("id %s fd %d", id, fd));
+ t = findtrack(id, 1/*create*/);
+ write(fd, "", 1); /* write an ack */
+ if(t->fd != -1) {
+ error(0, "got a connection for a track that already has one");
+ xclose(fd);
+ } else {
+ nonblock(fd);
+ t->fd = fd; /* yay */
+ }
+ }
+ } else
+ error(errno, "accept");
+ }
/* Perhaps we have a command to process */
if(fds[stdin_slot].revents & POLLIN) {
/* There might (in theory) be several commands queued up, but in general
* this won't be the case, so we don't bother looping around to pick them
* all up. */
- n = speaker_recv(0, &sm, &fd);
+ n = speaker_recv(0, &sm);
+ /* TODO */
if(n > 0)
switch(sm.type) {
- case SM_PREPARE:
- D(("SM_PREPARE %s %d", sm.id, fd));
- if(fd == -1) fatal(0, "got SM_PREPARE but no file descriptor");
- t = findtrack(sm.id, 1);
- acquire(t, fd);
- break;
case SM_PLAY:
- D(("SM_PLAY %s %d", sm.id, fd));
if(playing) fatal(0, "got SM_PLAY but already playing something");
t = findtrack(sm.id, 1);
- if(fd != -1) acquire(t, fd);
+ D(("SM_PLAY %s fd %d", t->id, t->fd));
+ if(t->fd == -1)
+ error(0, "cannot play track because no connection arrived");
playing = t;
/* We attempt to play straight away rather than going round the loop.
* play() is clever enough to perform any activation that is
if(t == playing) {
sm.type = SM_FINISHED;
strcpy(sm.id, playing->id);
- speaker_send(1, &sm, 0);
+ speaker_send(1, &sm);
playing = 0;
}
destroy(t);
}
/* Read in any buffered data */
for(t = tracks; t; t = t->next)
- if(t->slot != -1 && (fds[t->slot].revents & (POLLIN | POLLHUP)))
+ if(t->fd != -1
+ && t->slot != -1
+ && (fds[t->slot].revents & (POLLIN | POLLHUP)))
fill(t);
/* Maybe we finished playing a track somewhere in the above */
maybe_finished();
int main(int argc, char **argv) {
int n;
+ struct sockaddr_un addr;
+ static const int one = 1;
+ struct speaker_message sm;
set_progname(argv);
if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale");
backend = backends[n];
/* backend-specific initialization */
backend->init();
+ /* set up the listen socket */
+ listenfd = xsocket(PF_UNIX, SOCK_STREAM, 0);
+ memset(&addr, 0, sizeof addr);
+ addr.sun_family = AF_UNIX;
+ snprintf(addr.sun_path, sizeof addr.sun_path, "%s/speaker",
+ config->home);
+ if(unlink(addr.sun_path) < 0 && errno != ENOENT)
+ error(errno, "removing %s", addr.sun_path);
+ xsetsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
+ if(bind(listenfd, (const struct sockaddr *)&addr, sizeof addr) < 0)
+ fatal(errno, "error binding socket to %s", addr.sun_path);
+ xlisten(listenfd, 128);
+ nonblock(listenfd);
+ info("listening on %s", addr.sun_path);
+ memset(&sm, 0, sizeof sm);
+ sm.type = SM_READY;
+ speaker_send(1, &sm);
mainloop();
info("stopped (parent terminated)");
exit(0);
~mdw / disorder / blobdiff