diff options
Diffstat (limited to 'drivers/media/video/cx2341x.c')
| -rw-r--r-- | drivers/media/video/cx2341x.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/drivers/media/video/cx2341x.c b/drivers/media/video/cx2341x.c index 65f00fc08fa9..657e0b969145 100644 --- a/drivers/media/video/cx2341x.c +++ b/drivers/media/video/cx2341x.c @@ -691,7 +691,7 @@ void cx2341x_fill_defaults(struct cx2341x_mpeg_params *p) .video_luma_spatial_filter_type = V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_HOR, .video_chroma_spatial_filter_type = V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_1D_HOR, .video_temporal_filter_mode = V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_MANUAL, - .video_temporal_filter = 0, + .video_temporal_filter = 8, .video_median_filter_type = V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_OFF, .video_luma_median_filter_top = 255, .video_luma_median_filter_bottom = 0, @@ -731,6 +731,7 @@ int cx2341x_update(void *priv, cx2341x_mbox_func func, }; int err = 0; + u16 temporal = new->video_temporal_filter; cx2341x_api(priv, func, CX2341X_ENC_SET_OUTPUT_PORT, 2, new->port, 0); @@ -741,6 +742,7 @@ int cx2341x_update(void *priv, cx2341x_mbox_func func, if (old == NULL || old->width != new->width || old->height != new->height || old->video_encoding != new->video_encoding) { + int is_scaling; u16 w = new->width; u16 h = new->height; @@ -750,6 +752,20 @@ int cx2341x_update(void *priv, cx2341x_mbox_func func, } err = cx2341x_api(priv, func, CX2341X_ENC_SET_FRAME_SIZE, 2, h, w); if (err) return err; + + /* Adjust temporal filter if necessary. The problem with the temporal + filter is that it works well with full resolution capturing, but + not when the capture window is scaled (the filter introduces + a ghosting effect). So if the capture window changed, and there is + no updated filter value, then the filter is set depending on whether + the new window is full resolution or not. + + For full resolution a setting of 8 really improves the video + quality, especially if the original video quality is suboptimal. */ + is_scaling = new->width != 720 || new->height != (new->is_50hz ? 576 : 480); + if (old && old->video_temporal_filter == temporal) { + temporal = is_scaling ? 0 : 8; + } } if (old == NULL || old->stream_type != new->stream_type) { @@ -815,9 +831,9 @@ int cx2341x_update(void *priv, cx2341x_mbox_func func, } if (old == NULL || old->video_spatial_filter != new->video_spatial_filter || - old->video_temporal_filter != new->video_temporal_filter) { + old->video_temporal_filter != temporal) { err = cx2341x_api(priv, func, CX2341X_ENC_SET_DNR_FILTER_PROPS, 2, - new->video_spatial_filter, new->video_temporal_filter); + new->video_spatial_filter, temporal); if (err) return err; } if (old == NULL || old->video_temporal_decimation != new->video_temporal_decimation) { @@ -855,6 +871,9 @@ void cx2341x_log_status(struct cx2341x_mpeg_params *p, const char *prefix) printk(KERN_INFO "%s: Stream: %s\n", prefix, cx2341x_menu_item(p, V4L2_CID_MPEG_STREAM_TYPE)); + printk(KERN_INFO "%s: VBI Format: %s\n", + prefix, + cx2341x_menu_item(p, V4L2_CID_MPEG_STREAM_VBI_FMT)); /* Video */ printk(KERN_INFO "%s: Video: %dx%d, %d fps\n", |
