[media] go7007: correct a header check: MPEG4 has a different GOP code

Actually it's called "Group of VOP" start code in MPEG4 terminology.
Taken from the 0.9.8-5 version of the out-of-tree wis-go7007 driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/staging/media/go7007/go7007-driver.c b/drivers/staging/media/go7007/go7007-driver.c
index 4378223..3c0b258 100644 (file)
--- a/drivers/staging/media/go7007/go7007-driver.c
+++ b/drivers/staging/media/go7007/go7007-driver.c
@@ -435,16 +435,18 @@ static void write_bitmap_word(struct go7007 *go)
 void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
 {
        struct go7007_buffer *vb = go->active_buf;
-       int i, seq_start_code = -1, frame_start_code = -1;
+       int i, seq_start_code = -1, gop_start_code = -1, frame_start_code = -1;
 
        switch (go->format) {
        case V4L2_PIX_FMT_MPEG4:
                seq_start_code = 0xB0;
+               gop_start_code = 0xB3;
                frame_start_code = 0xB6;
                break;
        case V4L2_PIX_FMT_MPEG1:
        case V4L2_PIX_FMT_MPEG2:
                seq_start_code = 0xB3;
+               gop_start_code = 0xB8;
                frame_start_code = 0x00;
                break;
        }
@@ -526,7 +528,7 @@ void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
                             go->format == V4L2_PIX_FMT_MPEG2 ||
                             go->format == V4L2_PIX_FMT_MPEG4) &&
                            (buf[i] == seq_start_code ||
-                            buf[i] == 0xB8 || /* GOP code */
+                            buf[i] == gop_start_code ||
                             buf[i] == frame_start_code)) {
                                if (vb == NULL || go->seen_frame)
                                        vb = frame_boundary(go, vb);