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-rw-r--r--audio/pcm_bluetooth.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/audio/pcm_bluetooth.c b/audio/pcm_bluetooth.c
index fb3fce13..893a234c 100644
--- a/audio/pcm_bluetooth.c
+++ b/audio/pcm_bluetooth.c
@@ -764,6 +764,25 @@ done:
return ret;
}
+static int bluetooth_playback_delay(snd_pcm_ioplug_t *io,
+ snd_pcm_sframes_t *delayp)
+{
+ DBG("");
+
+ /* This updates io->hw_ptr value using pointer() function */
+ snd_pcm_hwsync(io->pcm);
+
+ *delayp = io->appl_ptr - io->hw_ptr;
+ if ((io->state == SND_PCM_STATE_RUNNING) && (*delayp < 0)) {
+ io->callback->stop(io);
+ io->state = SND_PCM_STATE_XRUN;
+ *delayp = 0;
+ }
+ /* This should never fail, ALSA API is really not
+ prepared to handle a non zero return value */
+ return 0;
+}
+
static snd_pcm_ioplug_callback_t bluetooth_hsp_playback = {
.start = bluetooth_playback_start,
.stop = bluetooth_playback_stop,
@@ -774,6 +793,7 @@ static snd_pcm_ioplug_callback_t bluetooth_hsp_playback = {
.transfer = bluetooth_hsp_write,
.poll_descriptors = bluetooth_playback_poll_descriptors,
.poll_revents = bluetooth_playback_poll_revents,
+ .delay = bluetooth_playback_delay,
};
static snd_pcm_ioplug_callback_t bluetooth_hsp_capture = {
@@ -798,6 +818,7 @@ static snd_pcm_ioplug_callback_t bluetooth_a2dp_playback = {
.transfer = bluetooth_a2dp_write,
.poll_descriptors = bluetooth_playback_poll_descriptors,
.poll_revents = bluetooth_playback_poll_revents,
+ .delay = bluetooth_playback_delay,
};
static snd_pcm_ioplug_callback_t bluetooth_a2dp_capture = {