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spiceqxl_audio: Only start the playback channel when fifos are present

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This lets the client free the audio resources when they are not needed.
This matches QEMU's behavior.
As a side benefit it stops the client's mm-time from being stuck (due
to the audio backend's delay updates being applied to the mm-time of
the last audio message, that is the channel's creation) when no audio
application is running.

Signed-off-by: Francois Gouget <fgouget@codeweavers.com>
This commit is contained in:
Francois Gouget
2016-03-18 15:32:17 +01:00
committed by Christophe Fergeau
parent 5671929aec
commit 5f5b502ecd
1 changed files with 23 additions and 12 deletions
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35
src/spiceqxl_audio.c
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@@ -63,6 +63,7 @@ struct fifo_data {
struct audio_data {
struct fifo_data fifos[MAX_FIFOS];
int active;
uint32_t *spice_buffer;
int spice_buffer_bytes;
int period_bytes;
@@ -247,7 +248,6 @@ static int process_fifos(qxl_screen_t *qxl, struct audio_data *data, int maxlen)
return TRUE;
}
/* a helper for read_from_fifos() */
static void condense_fifos(qxl_screen_t *qxl)
{
@@ -278,6 +278,12 @@ static void read_from_fifos(int fd, int event, void *opaque)
struct audio_data *data = qxl->playback_opaque;
int i;
int maxlen = 0;
if (data->wall_timer_live) {
qxl->core->timer_cancel(data->wall_timer);
data->wall_timer_live = 0;
}
for (i = 0; i < data->fifo_count; i++) {
struct fifo_data *f = &data->fifos[i];
@@ -319,17 +325,24 @@ static void read_from_fifos(int fd, int event, void *opaque)
condense_fifos(qxl);
}
if (maxlen && !data->active) {
spice_server_playback_start(&qxl->playback_sin);
data->active = 1;
}
if (!process_fifos(qxl, data, maxlen)) {
if (! data->wall_timer_live) {
qxl->core->timer_start(data->wall_timer, PERIOD_MS);
data->wall_timer_live = 1;
}
} else {
/* There is still some fifo data to process */
qxl->core->timer_start(data->wall_timer, PERIOD_MS);
data->wall_timer_live = 1;
} else if (data->fifo_count) {
/* All the fifo data was processed. Wait for more */
start_watching(qxl);
if (data->wall_timer_live) {
qxl->core->timer_cancel(data->wall_timer);
}
data->wall_timer_live = 0;
} else if (data->active) {
/* There is no open fifo anymore */
spice_server_playback_stop(&qxl->playback_sin);
data->active = 0;
}
}
@@ -459,8 +472,6 @@ static void audio_initialize (qxl_screen_t *qxl)
data->fifos[i].size = data->period_bytes * READ_BUFFER_PERIODS;
data->fifos[i].buffer = calloc(1, data->fifos[i].size);
}
spice_server_playback_start(&qxl->playback_sin);
}