pcm: dmix - use pcm_frame_diff() in snd_pcm_dmix_sync_ptr0()

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/src/pcm/pcm_dmix.c b/src/pcm/pcm_dmix.c
index 608593f192f9c7387cbadcae732a5429a6f0e163..0d0d0bff6668008d7e16825d27f9573a24ec7e0c 100644 (file)
--- a/src/pcm/pcm_dmix.c
+++ b/src/pcm/pcm_dmix.c
@@ -393,17 +393,13 @@ static int snd_pcm_dmix_sync_ptr0(snd_pcm_t *pcm, snd_pcm_uframes_t slave_hw_ptr
        
        old_slave_hw_ptr = dmix->slave_hw_ptr;
        dmix->slave_hw_ptr = slave_hw_ptr;
-       diff = slave_hw_ptr - old_slave_hw_ptr;
+       diff = pcm_frame_diff(slave_hw_ptr, old_slave_hw_ptr, dmix->slave_boundary);
        if (diff == 0)          /* fast path */
                return 0;
        if (dmix->state != SND_PCM_STATE_RUNNING &&
            dmix->state != SND_PCM_STATE_DRAINING)
                /* not really started yet - don't update hw_ptr */
                return 0;
-       if (diff < 0) {
-               slave_hw_ptr += dmix->slave_boundary;
-               diff = slave_hw_ptr - old_slave_hw_ptr;
-       }
        dmix->hw_ptr += diff;
        dmix->hw_ptr %= pcm->boundary;
        if (pcm->stop_threshold >= pcm->boundary)       /* don't care */