jack: trace the running state

Fixes: https://github.com/alsa-project/alsa-plugins/issues/11
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/jack/pcm_jack.c b/jack/pcm_jack.c
index 26674faccfef699e6158014388b2267aa5f030fd..324da714abbdff7b7ff15e0d0cf3c4bfbfad7371 100644 (file)
--- a/jack/pcm_jack.c
+++ b/jack/pcm_jack.c
@@ -44,6 +44,7 @@ typedef struct {
 
        int fd;
        int activated;          /* jack is activated? */
+       int running;            /* jack is running? */
 
        snd_pcm_jack_port_list_t **port_names;
        unsigned int num_ports;
@@ -207,6 +208,9 @@ snd_pcm_jack_process_cb(jack_nframes_t nframes, snd_pcm_ioplug_t *io)
        snd_pcm_jack_t *jack = io->private_data;
        snd_pcm_uframes_t xfer = 0;
        unsigned int channel;
+
+       if (!jack->running)
+               return 0;
        
        for (channel = 0; channel < io->channels; channel++) {
                jack->areas[channel].addr = 
@@ -365,7 +369,9 @@ static int snd_pcm_jack_prepare(snd_pcm_ioplug_t *io)
 
 static int snd_pcm_jack_start(snd_pcm_ioplug_t *io)
 {
-       (void)io;
+       snd_pcm_jack_t *jack = io->private_data;
+
+       jack->running = jack->activated;
        /*
         * Since the processing of jack_activate() and jack_connect() take a
         * while longer, snd_pcm_jack_start() was blocked.
@@ -382,7 +388,9 @@ static int snd_pcm_jack_start(snd_pcm_ioplug_t *io)
 
 static int snd_pcm_jack_stop(snd_pcm_ioplug_t *io)
 {
-       (void)io;
+       snd_pcm_jack_t *jack = io->private_data;
+
+       jack->running = 0;
        return 0;
 }
 
@@ -394,6 +402,7 @@ static int snd_pcm_jack_hw_free(snd_pcm_ioplug_t *io)
                jack_deactivate(jack->client);
                jack->activated = 0;
        }
+       jack->running = 0;
 #if 0
        unsigned i;
        for (i = 0; i < io->channels; i++) {