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lavfi/tinterlace: declare source buffers in copy_picture_field() as const 

Increase performance (slightly).
This commit is contained in:
Stefano Sabatini 2012-09-05 10:37:12 +02:00
parent fd5293d216
commit 9a2daef53f
1 changed files with 10 additions and 10 deletions
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20
libavfilter/vf_tinterlace.c
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@ -175,7 +175,7 @@ static int config_out_props(AVFilterLink *outlink)
*/
static inline
void copy_picture_field(uint8_t *dst[4], int dst_linesize[4],
uint8_t *src[4], int src_linesize[4],
const uint8_t *src[4], int src_linesize[4],
enum PixelFormat format, int w, int src_h,
int src_field, int interleave, int dst_field)
{
@ -187,7 +187,7 @@ void copy_picture_field(uint8_t *dst[4], int dst_linesize[4],
int lines = plane == 1 || plane == 2 ? src_h >> vsub : src_h;
int linesize = av_image_get_linesize(format, w, plane);
uint8_t *dstp = dst[plane];
uint8_t *srcp = src[plane];
const uint8_t *srcp = src[plane];
lines /= k;
if (src_field == FIELD_LOWER)
srcp += src_linesize[plane];
@ -235,12 +235,12 @@ static int end_frame(AVFilterLink *inlink)
/* write odd frame lines into the upper field of the new frame */
copy_picture_field(out->data, out->linesize,
cur->data, cur->linesize,
(const uint8_t **)cur->data, cur->linesize,
inlink->format, inlink->w, inlink->h,
FIELD_UPPER_AND_LOWER, 1, FIELD_UPPER);
/* write even frame lines into the lower field of the new frame */
copy_picture_field(out->data, out->linesize,
next->data, next->linesize,
(const uint8_t **)next->data, next->linesize,
inlink->format, inlink->w, inlink->h,
FIELD_UPPER_AND_LOWER, 1, FIELD_LOWER);
avfilter_unref_bufferp(&tinterlace->next);
@ -261,12 +261,12 @@ static int end_frame(AVFilterLink *inlink)
field = (1 + tinterlace->frame) & 1 ? FIELD_UPPER : FIELD_LOWER;
/* copy upper and lower fields */
copy_picture_field(out->data, out->linesize,
cur->data, cur->linesize,
(const uint8_t **)cur->data, cur->linesize,
inlink->format, inlink->w, inlink->h,
FIELD_UPPER_AND_LOWER, 1, field);
/* pad with black the other field */
copy_picture_field(out->data, out->linesize,
tinterlace->black_data, tinterlace->black_linesize,
(const uint8_t **)tinterlace->black_data, tinterlace->black_linesize,
inlink->format, inlink->w, inlink->h,
FIELD_UPPER_AND_LOWER, 1, !field);
break;
@ -283,12 +283,12 @@ static int end_frame(AVFilterLink *inlink)
/* copy upper/lower field from cur */
copy_picture_field(out->data, out->linesize,
cur->data, cur->linesize,
(const uint8_t **)cur->data, cur->linesize,
inlink->format, inlink->w, inlink->h,
tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER);
/* copy lower/upper field from next */
copy_picture_field(out->data, out->linesize,
next->data, next->linesize,
(const uint8_t **)next->data, next->linesize,
inlink->format, inlink->w, inlink->h,
tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER);
avfilter_unref_bufferp(&tinterlace->next);
@ -310,12 +310,12 @@ static int end_frame(AVFilterLink *inlink)
/* write current frame second field lines into the second field of the new frame */
copy_picture_field(out->data, out->linesize,
cur->data, cur->linesize,
(const uint8_t **)cur->data, cur->linesize,
inlink->format, inlink->w, inlink->h,
tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER);
/* write next frame first field lines into the first field of the new frame */
copy_picture_field(out->data, out->linesize,
next->data, next->linesize,
(const uint8_t **)next->data, next->linesize,
inlink->format, inlink->w, inlink->h,
tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER);
break;