From ce14ef3b9e73da3ddc62c286d1ef41637d798c6b Mon Sep 17 00:00:00 2001
From: bencollins <bencollins@53a565d1-3bb7-0310-b661-cf11e63c67ab>
Date: Thu, 17 Jul 2003 17:33:39 +0000
Subject: [PATCH] Patch from Dan Maas to add raw1394_iso_recv_flush() call to
 API, using the RAW1394_IOC_ISO_RECV_FLUSH ioctl. Updated the ieee1394-ioctl.h
 file aswell.

git-svn-id: svn://svn.linux1394.org/libraw1394/trunk@127 53a565d1-3bb7-0310-b661-cf11e63c67ab
---
 src/ieee1394-ioctl.h |  2 ++
 src/iso.c            | 26 +++++++++++++++++++++++---
 2 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/src/ieee1394-ioctl.h b/src/ieee1394-ioctl.h
index 1091bdf..24ef3b3 100644
--- a/src/ieee1394-ioctl.h
+++ b/src/ieee1394-ioctl.h
@@ -100,6 +100,8 @@
 	_IOW ('#', 0x27, struct raw1394_iso_packets)
 #define RAW1394_IOC_ISO_XMIT_SYNC		\
 	_IO  ('#', 0x28)
+#define RAW1394_IOC_ISO_RECV_FLUSH              \
+	_IO  ('#', 0x29)
 
 
 #endif /* __IEEE1394_IOCTL_H */
diff --git a/src/iso.c b/src/iso.c
index 32c0fa5..f6f18c7 100644
--- a/src/iso.c
+++ b/src/iso.c
@@ -256,7 +256,7 @@ int raw1394_iso_multichannel_recv_init(raw1394handle_t handle,
  **/
 int raw1394_iso_recv_listen_channel(raw1394handle_t handle, unsigned char channel)
 {
-	if(handle->iso_mode != ISO_RECV) {
+	if (handle->iso_mode != ISO_RECV) {
 		errno = EINVAL;
 		return -1;
 	}
@@ -269,7 +269,7 @@ int raw1394_iso_recv_listen_channel(raw1394handle_t handle, unsigned char channe
  **/
 int raw1394_iso_recv_unlisten_channel(raw1394handle_t handle, unsigned char channel)
 {
-	if(handle->iso_mode != ISO_RECV) {
+	if (handle->iso_mode != ISO_RECV) {
 		errno = EINVAL;
 		return -1;
 	}
@@ -277,6 +277,26 @@ int raw1394_iso_recv_unlisten_channel(raw1394handle_t handle, unsigned char chan
 	return ioctl(handle->fd, RAW1394_IOC_ISO_RECV_UNLISTEN_CHANNEL, channel);
 }
 
+/**
+ * raw1394_iso_recv_flush - if you specified an irq_interval > 1 in
+ * iso_recv_init, you won't be notified for every single iso packet, but
+ * for groups of them. Now e.g. if irq_interval is 100, and you were just
+ * notified about iso packets and after them only 20 more packets arrived,
+ * no notification will be generated (20 < 100). In the case that you know
+ * that there should be more packets at this moment, you can call this
+ * function and all iso packets which are already received by the kernel
+ * will be flushed out to user space.
+ */
+int raw1394_iso_recv_flush(raw1394handle_t handle)
+{
+	if (handle->iso_mode != ISO_RECV) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	return ioctl(handle->fd, RAW1394_IOC_ISO_RECV_FLUSH, 0);
+}
+
 /**
  * raw1394_iso_recv_set_channel_mask - listen or unlisten to a whole bunch of channels at once
  * @mask: 64-bit mask of channels, 1 means listen, 0 means unlisten,
@@ -286,7 +306,7 @@ int raw1394_iso_recv_unlisten_channel(raw1394handle_t handle, unsigned char chan
  **/
 int raw1394_iso_recv_set_channel_mask(raw1394handle_t handle, u_int64_t mask)
 {
-	if(handle->iso_mode != ISO_RECV) {
+	if (handle->iso_mode != ISO_RECV) {
 		errno = EINVAL;
 		return -1;
 	}