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avfilter/wavelet97: expose the per line analysis and synthesis

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Lets a filter run the row and column passes over ranges of lines, as
slice threading needs.

Assisted-by: Claude
This commit is contained in:
Michael Niedermayer authored and michaelni committed 2026-11-05 23:12:03 +00:00
1 parent 5e56cabf83
commit 205172946b
2 files changed
+37 -16
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libavfilter/wavelet97.c
+15 -15
View File
@@ -90,13 +90,13 @@ static inline void compose(float *dst, const float *src_l, const float *src_h,
}
}
static inline void decompose2D(float *dst_l, float *dst_h, const float *src,
const double coeff[2][5],
int xlinesize, int ylinesize,
int step, int w, int h)
void ff_wavelet97_decompose_lines(float *dst_l, float *dst_h, const float *src,
const double coeff[2][5],
int xlinesize, int ylinesize,
int step, int w, int line0, int line1)
{
int y, x;
for (y = 0; y < h; y++)
for (y = line0; y < line1; y++)
for (x = 0; x < step; x++)
decompose(dst_l + ylinesize*y + xlinesize*x,
dst_h + ylinesize*y + xlinesize*x,
@@ -104,12 +104,12 @@ static inline void decompose2D(float *dst_l, float *dst_h, const float *src,
coeff, step * xlinesize, (w - x + step - 1) / step);
}
static inline void compose2D(float *dst, const float *src_l, const float *src_h,
int xlinesize, int ylinesize,
int step, int w, int h)
void ff_wavelet97_compose_lines(float *dst, const float *src_l, const float *src_h,
int xlinesize, int ylinesize,
int step, int w, int line0, int line1)
{
int y, x;
for (y = 0; y < h; y++)
for (y = line0; y < line1; y++)
for (x = 0; x < step; x++)
compose(dst + ylinesize*y + xlinesize*x,
src_l + ylinesize*y + xlinesize*x,
@@ -121,15 +121,15 @@ void ff_wavelet97_decompose(float *dst[4], const float *src, float *temp[2],
const double coeff[2][5],
int linesize, int step, int w, int h)
{
decompose2D(temp[0], temp[1], src, coeff, 1, linesize, step, w, h);
decompose2D( dst[0], dst[1], temp[0], coeff, linesize, 1, step, h, w);
decompose2D( dst[2], dst[3], temp[1], coeff, linesize, 1, step, h, w);
ff_wavelet97_decompose_lines(temp[0], temp[1], src, coeff, 1, linesize, step, w, 0, h);
ff_wavelet97_decompose_lines( dst[0], dst[1], temp[0], coeff, linesize, 1, step, h, 0, w);
ff_wavelet97_decompose_lines( dst[2], dst[3], temp[1], coeff, linesize, 1, step, h, 0, w);
}
void ff_wavelet97_compose(float *dst, float *const src[4], float *temp[2],
int linesize, int step, int w, int h)
{
compose2D(temp[0], src[0], src[1], linesize, 1, step, h, w);
compose2D(temp[1], src[2], src[3], linesize, 1, step, h, w);
compose2D(dst, temp[0], temp[1], 1, linesize, step, w, h);
ff_wavelet97_compose_lines(temp[0], src[0], src[1], linesize, 1, step, h, 0, w);
ff_wavelet97_compose_lines(temp[1], src[2], src[3], linesize, 1, step, h, 0, w);
ff_wavelet97_compose_lines(dst, temp[0], temp[1], 1, linesize, step, w, 0, h);
}
libavfilter/wavelet97.h
+22 -1
View File
@@ -32,7 +32,28 @@
extern const double ff_wavelet97_coeff[2][5];
/**
* One level of 2D analysis, filters are mirrored at the plane borders.
* Undecimated analysis of lines line0..line1-1 along one direction.
* Line y, sample x is at src[y * ylinesize + x * xlinesize], x < w, w >= 2.
*
* @param dst_l lowpass output, same layout as src
* @param dst_h highpass output, same layout as src
* @param coeff lowpass and highpass filters, normally ff_wavelet97_coeff
* @param step dilation of the filters, 1 << level
*/
void ff_wavelet97_decompose_lines(float *dst_l, float *dst_h, const float *src,
const double coeff[2][5],
int xlinesize, int ylinesize,
int step, int w, int line0, int line1);
/**
* Inverse of ff_wavelet97_decompose_lines() with ff_wavelet97_coeff.
*/
void ff_wavelet97_compose_lines(float *dst, const float *src_l, const float *src_h,
int xlinesize, int ylinesize,
int step, int w, int line0, int line1);
/**
* One level of undecimated 2D analysis, filters are mirrored at the plane borders.
*
* @param dst output bands LL, LH, HL, HH (horizontal/vertical filter)
* @param src input plane