void
stop_sound(sound_t* sound, bool rewind)
{
al_set_audio_stream_playing(sound->stream, false);
if (rewind)
al_rewind_audio_stream(sound->stream);
}
static int allua_audio_stream_rewind(lua_State * L)
{
ALLUA_audio_stream audio_stream = allua_check_audio_stream(L, 1);
lua_pushboolean(L, al_rewind_audio_stream(audio_stream));
return 1;
}
bool AudioStream::rewind()
{
al_seek_audio_stream_secs(m_stream, 0);
return al_rewind_audio_stream(m_stream);
}
/* _al_kcm_feed_stream:
* A routine running in another thread that feeds the stream buffers as
* neccesary, usually getting data from some file reader backend.
*/
void *_al_kcm_feed_stream(ALLEGRO_THREAD *self, void *vstream)
{
ALLEGRO_AUDIO_STREAM *stream = vstream;
ALLEGRO_EVENT_QUEUE *queue;
ALLEGRO_EVENT event;
(void)self;
ALLEGRO_DEBUG("Stream feeder thread started.\n");
queue = al_create_event_queue();
al_register_event_source(queue, &stream->spl.es);
al_lock_mutex(stream->feed_thread_started_mutex);
stream->feed_thread_started = true;
al_broadcast_cond(stream->feed_thread_started_cond);
al_unlock_mutex(stream->feed_thread_started_mutex);
stream->quit_feed_thread = false;
while (!stream->quit_feed_thread) {
char *fragment;
ALLEGRO_EVENT event;
al_wait_for_event(queue, &event);
if (event.type == ALLEGRO_EVENT_AUDIO_STREAM_FRAGMENT
&& !stream->is_draining) {
unsigned long bytes;
unsigned long bytes_written;
ALLEGRO_MUTEX *stream_mutex;
fragment = al_get_audio_stream_fragment(stream);
if (!fragment) {
/* This is not an error. */
continue;
}
bytes = (stream->spl.spl_data.len) *
al_get_channel_count(stream->spl.spl_data.chan_conf) *
al_get_audio_depth_size(stream->spl.spl_data.depth);
stream_mutex = maybe_lock_mutex(stream->spl.mutex);
bytes_written = stream->feeder(stream, fragment, bytes);
maybe_unlock_mutex(stream_mutex);
if (stream->spl.loop == _ALLEGRO_PLAYMODE_STREAM_ONEDIR) {
/* Keep rewinding until the fragment is filled. */
while (bytes_written < bytes &&
stream->spl.loop == _ALLEGRO_PLAYMODE_STREAM_ONEDIR) {
size_t bw;
al_rewind_audio_stream(stream);
stream_mutex = maybe_lock_mutex(stream->spl.mutex);
bw = stream->feeder(stream, fragment + bytes_written,
bytes - bytes_written);
bytes_written += bw;
maybe_unlock_mutex(stream_mutex);
}
}
else if (bytes_written < bytes) {
/* Fill the rest of the fragment with silence. */
int silence_samples = (bytes - bytes_written) /
(al_get_channel_count(stream->spl.spl_data.chan_conf) *
al_get_audio_depth_size(stream->spl.spl_data.depth));
al_fill_silence(fragment + bytes_written, silence_samples,
stream->spl.spl_data.depth, stream->spl.spl_data.chan_conf);
}
if (!al_set_audio_stream_fragment(stream, fragment)) {
ALLEGRO_ERROR("Error setting stream buffer.\n");
continue;
}
/* The streaming source doesn't feed any more, drain buffers and quit. */
if (bytes_written != bytes &&
stream->spl.loop == _ALLEGRO_PLAYMODE_STREAM_ONCE) {
al_drain_audio_stream(stream);
stream->quit_feed_thread = true;
}
}
else if (event.type == _KCM_STREAM_FEEDER_QUIT_EVENT_TYPE) {
stream->quit_feed_thread = true;
}
}
event.user.type = ALLEGRO_EVENT_AUDIO_STREAM_FINISHED;
event.user.timestamp = al_get_time();
al_emit_user_event(&stream->spl.es, &event, NULL);
al_destroy_event_queue(queue);
ALLEGRO_DEBUG("Stream feeder thread finished.\n");
return NULL;
}
