V4L/DVB (9078): gspca: New exported function to retrieve the current frame buffer.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 22 insertions, 12 deletions

diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index e4c998965ab2..4694dc14a249 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -102,6 +102,22 @@ static struct vm_operations_struct gspca_vm_ops = {
         .close          = gspca_vm_close,
 };
 
+/* get the current input frame buffer */
+struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev)
+{
+        struct gspca_frame *frame;
+        int i;
+
+        i = gspca_dev->fr_i;
+        i = gspca_dev->fr_queue[i];
+        frame = &gspca_dev->frame[i];
+        if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
+                                != V4L2_BUF_FLAG_QUEUED)
+                return NULL;
+        return frame;
+}
+EXPORT_SYMBOL(gspca_get_i_frame);
+
 /*
  * fill a video frame from an URB and resubmit
  */
@@ -110,7 +126,7 @@ static void fill_frame(struct gspca_dev *gspca_dev,
 {
         struct gspca_frame *frame;
         __u8 *data;             /* address of data in the iso message */
-        int i, j, len, st;
+        int i, len, st;
         cam_pkt_op pkt_scan;
 
         if (urb->status != 0) {
@@ -124,11 +140,8 @@ static void fill_frame(struct gspca_dev *gspca_dev,
         for (i = 0; i < urb->number_of_packets; i++) {
 
                 /* check the availability of the frame buffer */
-                j = gspca_dev->fr_i;
-                j = gspca_dev->fr_queue[j];
-                frame = &gspca_dev->frame[j];
-                if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
-                                        != V4L2_BUF_FLAG_QUEUED) {
+                frame = gspca_get_i_frame(gspca_dev);
+                if (!frame) {
                         gspca_dev->last_packet_type = DISCARD_PACKET;
                         break;
                 }
@@ -185,7 +198,6 @@ static void bulk_irq(struct urb *urb
 {
         struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
         struct gspca_frame *frame;
-        int j;
 
         PDEBUG(D_PACK, "bulk irq");
         if (!gspca_dev->streaming)
@@ -199,11 +211,8 @@ static void bulk_irq(struct urb *urb
         }
 
         /* check the availability of the frame buffer */
-        j = gspca_dev->fr_i;
-        j = gspca_dev->fr_queue[j];
-        frame = &gspca_dev->frame[j];
-        if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
-                                != V4L2_BUF_FLAG_QUEUED) {
+        frame = gspca_get_i_frame(gspca_dev);
+        if (!frame) {
                 gspca_dev->last_packet_type = DISCARD_PACKET;
         } else {
                 PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h
index 78a35a88cf97..72a288573051 100644
--- a/drivers/media/video/gspca/gspca.h
+++ b/drivers/media/video/gspca/gspca.h
@@ -178,6 +178,7 @@ struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
                                     struct gspca_frame *frame,
                                     const __u8 *data,
                                     int len);
+struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev);
 #ifdef CONFIG_PM
 int gspca_suspend(struct usb_interface *intf, pm_message_t message);
 int gspca_resume(struct usb_interface *intf);