Update of /cvsroot/alsa/alsa-kernel/core
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv4570/core
Modified Files:
pcm_native.c
Log Message:
Added SYNC_PTR ioctl for the PCM interface.
Index: pcm_native.c
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/core/pcm_native.c,v
retrieving revision 1.88
retrieving revision 1.89
diff -u -r1.88 -r1.89
--- pcm_native.c 15 Apr 2004 09:16:13 -0000 1.88
+++ pcm_native.c 17 May 2004 06:47:18 -0000 1.89
@@ -2335,6 +2335,37 @@
return err;
}
+static int snd_pcm_sync_ptr(snd_pcm_substream_t *substream, struct sndrv_pcm_sync_ptr
*_sync_ptr)
+{
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ struct sndrv_pcm_sync_ptr sync_ptr;
+ volatile struct sndrv_pcm_mmap_status *status;
+ volatile struct sndrv_pcm_mmap_control *control;
+
+ memset(&sync_ptr, 0, sizeof(sync_ptr));
+ if (get_user(sync_ptr.flags, (unsigned int *) &(_sync_ptr->flags)))
+ return -EFAULT;
+ if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct
sndrv_pcm_mmap_control)))
+ return -EFAULT;
+ status = runtime->status;
+ control = runtime->control;
+ snd_pcm_stream_lock_irq(substream);
+ control->appl_ptr = sync_ptr.c.control.appl_ptr;
+ control->avail_min = sync_ptr.c.control.avail_min;
+ sync_ptr.s.status.state = status->state;
+ sync_ptr.s.status.hw_ptr = status->hw_ptr;
+ sync_ptr.s.status.tstamp = status->tstamp;
+ sync_ptr.s.status.suspended_state = status->suspended_state;
+ snd_pcm_stream_unlock_irq(substream);
+ if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr))) {
+ return -EFAULT;
+ } else {
+ if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC)
+ return snd_pcm_hwsync(substream);
+ }
+ return 0;
+}
+
static int snd_pcm_playback_ioctl1(snd_pcm_substream_t *substream,
unsigned int cmd, void *arg);
static int snd_pcm_capture_ioctl1(snd_pcm_substream_t *substream,
@@ -2388,6 +2419,8 @@
return snd_pcm_hwsync(substream);
case SNDRV_PCM_IOCTL_DELAY:
return snd_pcm_delay(substream, (snd_pcm_sframes_t *) arg);
+ case SNDRV_PCM_IOCTL_SYNC_PTR:
+ return snd_pcm_sync_ptr(substream, (struct sndrv_pcm_sync_ptr *) arg);
case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
return snd_pcm_hw_refine_old_user(substream, (struct
sndrv_pcm_hw_params_old *) arg);
case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
-------------------------------------------------------
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