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authorMax Kellermann <max@duempel.org>2009-10-21 18:33:05 +0200
committerMax Kellermann <max@duempel.org>2009-10-21 18:33:05 +0200
commit1ff39476eb3d14e4535f9b7600213c905b346185 (patch)
tree61a597c98f6f68efa9dd077f7e04a230f1ff7a4f /src/output
parentacfd9a73bca59476af5680bd04902b2215813f74 (diff)
downloadmpd-1ff39476eb3d14e4535f9b7600213c905b346185.tar.gz
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output/jack: implement the "pause" method
Don't disconnect from JACK during pause.
Diffstat (limited to 'src/output')
-rw-r--r--src/output/jack_output_plugin.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/src/output/jack_output_plugin.c b/src/output/jack_output_plugin.c
index 0c935633a..a73f80c48 100644
--- a/src/output/jack_output_plugin.c
+++ b/src/output/jack_output_plugin.c
@@ -58,6 +58,12 @@ struct jack_data {
jack_ringbuffer_t *ringbuffer[2];
bool shutdown;
+
+ /**
+ * While this flag is set, the "process" callback generates
+ * silence.
+ */
+ bool pause;
};
/**
@@ -116,6 +122,19 @@ mpd_jack_process(jack_nframes_t nframes, void *arg)
if (nframes <= 0)
return 0;
+ if (jd->pause) {
+ /* generate silence while MPD is paused */
+
+ for (unsigned i = 0; i < G_N_ELEMENTS(jd->ringbuffer); ++i) {
+ out = jack_port_get_buffer(jd->ports[i], nframes);
+
+ for (jack_nframes_t f = 0; f < nframes; ++f)
+ out[f] = 0.0;
+ }
+
+ return 0;
+ }
+
for (unsigned i = 0; i < G_N_ELEMENTS(jd->ringbuffer); ++i) {
available = jack_ringbuffer_read_space(jd->ringbuffer[i]);
assert(available % sample_size == 0);
@@ -308,6 +327,8 @@ mpd_jack_open(void *data, struct audio_format *audio_format, GError **error)
assert(jd != NULL);
+ jd->pause = false;
+
if (!mpd_jack_connect(jd, error)) {
mpd_jack_client_free(jd);
return false;
@@ -405,6 +426,8 @@ mpd_jack_play(void *data, const void *chunk, size_t size, GError **error)
const size_t frame_size = audio_format_frame_size(&jd->audio_format);
size_t space = 0, space1;
+ jd->pause = false;
+
assert(size % frame_size == 0);
size /= frame_size;
@@ -438,6 +461,23 @@ mpd_jack_play(void *data, const void *chunk, size_t size, GError **error)
return size * frame_size;
}
+static bool
+mpd_jack_pause(void *data)
+{
+ struct jack_data *jd = data;
+
+ if (jd->shutdown)
+ return false;
+
+ jd->pause = true;
+
+ /* due to a MPD API limitation, we have to sleep a little bit
+ here, to avoid hogging the CPU */
+ g_usleep(50000);
+
+ return true;
+}
+
const struct audio_output_plugin jack_output_plugin = {
.name = "jack",
.test_default_device = mpd_jack_test_default_device,
@@ -446,5 +486,6 @@ const struct audio_output_plugin jack_output_plugin = {
.open = mpd_jack_open,
.play = mpd_jack_play,
.cancel = mpd_jack_cancel,
+ .pause = mpd_jack_pause,
.close = mpd_jack_close,
};