V4L/DVB (13451): gspca - main: Memorize the current frame buffer.

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

diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index 08433f7..31ec5aa 100644 (file)
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -126,7 +126,6 @@ EXPORT_SYMBOL(gspca_get_i_frame);
 static void fill_frame(struct gspca_dev *gspca_dev,
                        struct urb *urb)
 {
-       struct gspca_frame *frame;
        u8 *data;               /* address of data in the iso message */
        int i, len, st;
        cam_pkt_op pkt_scan;
@@ -146,8 +145,8 @@ 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 */
-               frame = gspca_get_i_frame(gspca_dev);
-               if (!frame) {
+               if ((gspca_dev->cur_frame->v4l2_buf.flags & BUF_ALL_FLAGS)
+                                       != V4L2_BUF_FLAG_QUEUED) {
                        gspca_dev->last_packet_type = DISCARD_PACKET;
                        break;
                }
@@ -173,7 +172,7 @@ static void fill_frame(struct gspca_dev *gspca_dev,
                        i, urb->iso_frame_desc[i].offset, len);
                data = (u8 *) urb->transfer_buffer
                                        + urb->iso_frame_desc[i].offset;
-               pkt_scan(gspca_dev, frame, data, len);
+               pkt_scan(gspca_dev, gspca_dev->cur_frame, data, len);
        }
 
 resubmit:
@@ -204,7 +203,6 @@ static void isoc_irq(struct urb *urb)
 static void bulk_irq(struct urb *urb)
 {
        struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
-       struct gspca_frame *frame;
        int st;
 
        PDEBUG(D_PACK, "bulk irq");
@@ -226,13 +224,13 @@ static void bulk_irq(struct urb *urb)
        }
 
        /* check the availability of the frame buffer */
-       frame = gspca_get_i_frame(gspca_dev);
-       if (!frame) {
+       if ((gspca_dev->cur_frame->v4l2_buf.flags & BUF_ALL_FLAGS)
+                               != V4L2_BUF_FLAG_QUEUED) {
                gspca_dev->last_packet_type = DISCARD_PACKET;
        } else {
                PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
                gspca_dev->sd_desc->pkt_scan(gspca_dev,
-                                       frame,
+                                       gspca_dev->frame,
                                        urb->transfer_buffer,
                                        urb->actual_length);
        }
@@ -260,13 +258,15 @@ resubmit:
  */
 struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
                                    enum gspca_packet_type packet_type,
-                                   struct gspca_frame *frame,
+                                   struct gspca_frame *dummy,
                                    const __u8 *data,
                                    int len)
 {
+       struct gspca_frame *frame;
        int i, j;
 
        PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len);
+       frame = gspca_dev->cur_frame;
 
        /* when start of a new frame, if the current frame buffer
         * is not queued, discard the whole frame */
@@ -315,7 +315,7 @@ struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
                        i,
                        gspca_dev->fr_o);
                j = gspca_dev->fr_queue[i];
-               frame = &gspca_dev->frame[j];
+               gspca_dev->cur_frame = frame = &gspca_dev->frame[j];
        }
        return frame;
 }
@@ -398,6 +398,7 @@ static int frame_alloc(struct gspca_dev *gspca_dev,
                frame->v4l2_buf.m.offset = i * frsz;
        }
        gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
+       gspca_dev->cur_frame = &gspca_dev->frame[0];
        gspca_dev->last_packet_type = DISCARD_PACKET;
        gspca_dev->sequence = 0;
        return 0;

diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h
index d59a684..59078bb 100644 (file)
--- a/drivers/media/video/gspca/gspca.h
+++ b/drivers/media/video/gspca/gspca.h
@@ -151,6 +151,7 @@ struct gspca_dev {
 
        __u8 *frbuf;                            /* buffer for nframes */
        struct gspca_frame frame[GSPCA_MAX_FRAMES];
+       struct gspca_frame *cur_frame;          /* frame beeing filled */
        __u32 frsz;                             /* frame size */
        char nframes;                           /* number of frames */
        char fr_i;                              /* frame being filled */