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avfilter/interlace: simplify code

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Signed-off-by: Thomas Mundt <tmundt75@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Thomas Mundt 2017-09-14 21:20:24 +02:00 committed by Michael Niedermayer
parent a7f6bfdc18
commit ed48e22748
2 changed files with 18 additions and 42 deletions
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31
libavfilter/vf_interlace.c
View File

@ -181,6 +181,8 @@ static void copy_picture_field(InterlaceContext *s,
int lines = (plane == 1 || plane == 2) ? AV_CEIL_RSHIFT(inlink->h, vsub) : inlink->h;
uint8_t *dstp = dst_frame->data[plane];
const uint8_t *srcp = src_frame->data[plane];
int srcp_linesize = src_frame->linesize[plane] * 2;
int dstp_linesize = dst_frame->linesize[plane] * 2;
av_assert0(cols >= 0 || lines >= 0);
@ -189,38 +191,23 @@ static void copy_picture_field(InterlaceContext *s,
srcp += src_frame->linesize[plane];
dstp += dst_frame->linesize[plane];
}
if (lowpass == VLPF_LIN) {
int srcp_linesize = src_frame->linesize[plane] * 2;
int dstp_linesize = dst_frame->linesize[plane] * 2;
if (lowpass) {
int x = 0;
if (lowpass == VLPF_CMP)
x = 1;
for (j = lines; j > 0; j--) {
ptrdiff_t pref = src_frame->linesize[plane];
ptrdiff_t mref = -pref;
if (j == lines)
mref = 0; // there is no line above
else if (j == 1)
pref = 0; // there is no line below
s->lowpass_line(dstp, cols, srcp, mref, pref);
dstp += dstp_linesize;
srcp += srcp_linesize;
}
} else if (lowpass == VLPF_CMP) {
int srcp_linesize = src_frame->linesize[plane] * 2;
int dstp_linesize = dst_frame->linesize[plane] * 2;
for (j = lines; j > 0; j--) {
ptrdiff_t pref = src_frame->linesize[plane];
ptrdiff_t mref = -pref;
if (j >= (lines - 1))
if (j >= (lines - x))
mref = 0;
else if (j <= 2)
else if (j <= (1 + x))
pref = 0;
s->lowpass_line(dstp, cols, srcp, mref, pref);
dstp += dstp_linesize;
srcp += srcp_linesize;
}
} else {
av_image_copy_plane(dstp, dst_frame->linesize[plane] * 2,
srcp, src_frame->linesize[plane] * 2,
cols, lines);
av_image_copy_plane(dstp, dstp_linesize, srcp, srcp_linesize, cols, lines);
}
}
}

29
libavfilter/vf_tinterlace.c
View File

@ -252,6 +252,8 @@ void copy_picture_field(TInterlaceContext *tinterlace,
int cols = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT( w, hsub) : w;
uint8_t *dstp = dst[plane];
const uint8_t *srcp = src[plane];
int srcp_linesize = src_linesize[plane] * k;
int dstp_linesize = dst_linesize[plane] * (interleave ? 2 : 1);
lines = (lines + (src_field == FIELD_UPPER)) / k;
if (src_field == FIELD_LOWER)
@ -261,35 +263,22 @@ void copy_picture_field(TInterlaceContext *tinterlace,
// Low-pass filtering is required when creating an interlaced destination from
// a progressive source which contains high-frequency vertical detail.
// Filtering will reduce interlace 'twitter' and Moire patterning.
if (flags & TINTERLACE_FLAG_CVLPF) {
int srcp_linesize = src_linesize[plane] * k;
int dstp_linesize = dst_linesize[plane] * (interleave ? 2 : 1);
if (flags & TINTERLACE_FLAG_VLPF || flags & TINTERLACE_FLAG_CVLPF) {
int x = 0;
if (flags & TINTERLACE_FLAG_CVLPF)
x = 1;
for (h = lines; h > 0; h--) {
ptrdiff_t pref = src_linesize[plane];
ptrdiff_t mref = -pref;
if (h >= (lines - 1)) mref = 0;
else if (h <= 2) pref = 0;
tinterlace->lowpass_line(dstp, cols, srcp, mref, pref);
dstp += dstp_linesize;
srcp += srcp_linesize;
}
} else if (flags & TINTERLACE_FLAG_VLPF) {
int srcp_linesize = src_linesize[plane] * k;
int dstp_linesize = dst_linesize[plane] * (interleave ? 2 : 1);
for (h = lines; h > 0; h--) {
ptrdiff_t pref = src_linesize[plane];
ptrdiff_t mref = -pref;
if (h == lines) mref = 0; // there is no line above
else if (h == 1) pref = 0; // there is no line below
if (h >= (lines - x)) mref = 0; // there is no line above
else if (h <= (1 + x)) pref = 0; // there is no line below
tinterlace->lowpass_line(dstp, cols, srcp, mref, pref);
dstp += dstp_linesize;
srcp += srcp_linesize;
}
} else {
av_image_copy_plane(dstp, dst_linesize[plane] * (interleave ? 2 : 1),
srcp, src_linesize[plane]*k, cols, lines);
av_image_copy_plane(dstp, dstp_linesize, srcp, srcp_linesize, cols, lines);
}
}
}