V4L/DVB (5438): Fix ivtv yuv threshold handling

Modifies automatic mode selection for yuv playback. Behaviour is now that
source video with a vertical resolution below that of the currently set
broadcast mode will be treated as progressive. Video with a vertical
resolution greater or equal to the current broadcast mode (up to 576 lines)
will be treated as interlaced.

Signed-off-by: Ian Armstrong <ian@iarmst.demon.co.uk>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

diff --git a/drivers/media/video/ivtv/ivtv-driver.c b/drivers/media/video/ivtv/ivtv-driver.c
index 8b5597f..45b9328 100644 (file)
--- a/drivers/media/video/ivtv/ivtv-driver.c
+++ b/drivers/media/video/ivtv/ivtv-driver.c
@@ -116,7 +116,7 @@ static int dec_yuv_buffers = IVTV_DEFAULT_DEC_YUV_BUFFERS;
 static int dec_vbi_buffers = IVTV_DEFAULT_DEC_VBI_BUFFERS;
 
 static int ivtv_yuv_mode = 0;
-static int ivtv_yuv_threshold=480;
+static int ivtv_yuv_threshold=-1;
 static int ivtv_pci_latency = 1;
 
 int ivtv_debug = 0;

diff --git a/drivers/media/video/ivtv/ivtv-driver.h b/drivers/media/video/ivtv/ivtv-driver.h
index ce28923..9a412d6 100644 (file)
--- a/drivers/media/video/ivtv/ivtv-driver.h
+++ b/drivers/media/video/ivtv/ivtv-driver.h
@@ -606,7 +606,6 @@ struct yuv_playback_info
 
        int lace_mode;
        int lace_threshold;
-       int lace_threshold_last;
        int lace_sync_field;
 
        atomic_t next_dma_frame;

diff --git a/drivers/media/video/ivtv/ivtv-yuv.c b/drivers/media/video/ivtv/ivtv-yuv.c
index 286a0d7..bcea095 100644 (file)
--- a/drivers/media/video/ivtv/ivtv-yuv.c
+++ b/drivers/media/video/ivtv/ivtv-yuv.c
@@ -613,16 +613,19 @@ static void ivtv_yuv_handle_vertical(struct ivtv *itv, struct yuv_frame_info *wi
        }
 
        itv->yuv_info.frame_interlaced_last = itv->yuv_info.frame_interlaced;
-       itv->yuv_info.lace_threshold_last = itv->yuv_info.lace_threshold;
 }
 
 /* Modify the supplied coordinate information to fit the visible osd area */
 static u32 ivtv_yuv_window_setup (struct ivtv *itv, struct yuv_frame_info *window)
 {
-       int osd_crop;
+       int osd_crop, lace_threshold;
        u32 osd_scale;
        u32 yuv_update = 0;
 
+       lace_threshold = itv->yuv_info.lace_threshold;
+       if (lace_threshold < 0)
+               lace_threshold = itv->yuv_info.decode_height - 1;
+
        /* Work out the lace settings */
        switch (itv->yuv_info.lace_mode) {
                case IVTV_YUV_MODE_PROGRESSIVE: /* Progressive mode */
@@ -639,7 +642,7 @@ static u32 ivtv_yuv_window_setup (struct ivtv *itv, struct yuv_frame_info *windo
                        break;
 
                case IVTV_YUV_MODE_AUTO:
-                       if (window->tru_h <= itv->yuv_info.lace_threshold || window->tru_h > 576 || window->tru_w > 720){
+                       if (window->tru_h <= lace_threshold || window->tru_h > 576 || window->tru_w > 720){
                                itv->yuv_info.frame_interlaced = 0;
                                if ((window->tru_h < 512) ||
                                  (window->tru_h > 576 && window->tru_h < 1021) ||