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#include <errno.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/resource.h>
#include <unistd.h>
#include "common.h"
#include "playlist.h"
#include "streamer.h"
#include "transmuxer.h"
/* ===== Definitions ===== */
#define PRIORITY -10
struct Streamer {
pthread_t worker_thread;
pthread_mutex_t worker_ready_mutex;
pthread_cond_t worker_ready_cond;
int worker_ready_flag;
enum State state;
pthread_mutex_t state_mutex;
HLSRemuxer *remuxer;
Playlist *playlist;
char *current_song;
};
/* ====== Streamer initialisation ===== */
static void *streamer_worker (void *t);
Streamer *streamer_init (const struct StreamerOpt *opts)
{
Streamer *s = NULL;
Playlist *p = NULL;
HLSRemuxer *r = NULL;
if ((s = malloc(sizeof(*s))) == NULL)
goto error;
if ((p = playlist_init()) == NULL)
goto error;
if ((r = hls_remuxer_init(opts)) == NULL)
goto error;
if (pthread_create(&s->worker_thread, NULL, streamer_worker, s))
goto error;
s->playlist = p;
s->remuxer = r;
s->state = STATE_STANDBY;
s->state_mutex = (pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER;
return s;
error:
hls_remuxer_free(r);
playlist_free(p);
free(s);
return NULL;
}
int streamer_push(Streamer *s, const char *url, unsigned int index)
{
return (index == PLAYLIST_END)
? playlist_enqueue(s->playlist, url)
: playlist_insert(s->playlist, index, url);
}
int streamer_pop(Streamer *s, unsigned int id)
{
int err;
struct Entry entry;
if ((err = playlist_remove(s->playlist, id, &entry)))
return err;
free(entry.file);
return 0;
}
void streamer_skip(Streamer *s)
{
/* 'skip' only halt the current song, which is then replaced by the streamer
* worker, either immediately, or as soon as a song gets pushed.
*/
hls_remuxer_halt(s->remuxer);
}
void streamer_pause(Streamer *s)
{
pthread_mutex_lock(&s->state_mutex);
if (s->state == STATE_PLAYING) {
hls_remuxer_pause(s->remuxer);
s->state = STATE_PAUSED;
}
pthread_mutex_unlock(&s->state_mutex);
}
void streamer_resume(Streamer *s)
{
pthread_mutex_lock(&s->state_mutex);
if (s->state == STATE_PAUSED) {
hls_remuxer_resume(s->remuxer);
s->state = STATE_PLAYING;
}
pthread_mutex_unlock(&s->state_mutex);
}
int streamer_info(Streamer *streamer, struct StateInfo *info)
{
pthread_mutex_lock(&streamer->state_mutex);
info->state = streamer->state;
if ((info->current_song = strdup(streamer->current_song)) == NULL) {
pthread_mutex_unlock(&streamer->state_mutex);
return -1;
}
if (playlist_list(streamer->playlist, info)) {
pthread_mutex_unlock(&streamer->state_mutex);
free(info->current_song);
return -1;
}
pthread_mutex_unlock(&streamer->state_mutex);
return 0;
}
void streamer_free (Streamer *s)
{
pthread_kill(s->worker_thread, SIGTERM);
hls_remuxer_halt(s->remuxer);
pthread_join(s->worker_thread, NULL);
playlist_free(s->playlist);
free(s);
}
static inline int streamer_worker_conf_priority(void)
{
errno = 0;
setpriority(PRIO_PROCESS, 0, PRIORITY);
return errno ? -1 : 0;
}
static void *streamer_worker(void *arg)
{
Streamer *s;
struct Entry next;
/* Configure worker */
pthread_mutex_lock(&s->worker_ready_mutex);
streamer_worker_conf_priority();
s->worker_ready_flag = 1;
pthread_cond_broadcast(&s->worker_ready_cond);
pthread_mutex_unlock(&s->worker_ready_mutex);
/* Main loop */
while (s->state != ) {
/* Attempt to fetch the next song, or go into standby mode */
if (playlist_try_dequeue(s->playlist, &next)) {
puts("The playlist is empty, going into standby mode.");
pthread_mutex_lock(&s->state_mutex);
s->state = STATE_STANDBY;
pthread_mutex_unlock(&s->state_mutex);
playlist_dequeue(s->playlist, &next);
}
/* Update the current state */
pthread_mutex_lock(&s->state_mutex);
printf("Next song: [%i] %s\n", next.id, next.file);
s->current_song = next.file;
s->state = STATE_PLAYING;
pthread_mutex_unlock(&s->state_mutex);
/* Play the song entirely */
hls_remuxer_play(s->remuxer, next.file);
/* Discard current_song, but keep the current 'playing' state. */
pthread_mutex_lock(&s->state_mutex);
free(s->current_song);
s->current_song = NULL;
pthread_mutex_unlock(&s->state_mutex);
}
return NULL;
}
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