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avfilter/vf_w3fdif: scale down coefficiends by 2
Signed-off-by: Paul B Mahol <onemda@gmail.com>
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71199ee907
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@ -122,7 +122,7 @@ static int config_output(AVFilterLink *outlink)
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}
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/*
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* Filter coefficients from PH-2071, scaled by 256 * 256.
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* Filter coefficients from PH-2071, scaled by 256 * 128.
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* Each set of coefficients has a set for low-frequencies and high-frequencies.
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* n_coef_lf[] and n_coef_hf[] are the number of coefs for simple and more-complex.
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* It is important for later that n_coef_lf[] is even and n_coef_hf[] is odd.
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@ -130,11 +130,11 @@ static int config_output(AVFilterLink *outlink)
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* and high-frequencies for simple and more-complex mode.
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*/
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static const int8_t n_coef_lf[2] = { 2, 4 };
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static const int32_t coef_lf[2][4] = {{ 32768, 32768, 0, 0},
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{ -1704, 34472, 34472, -1704}};
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static const int16_t coef_lf[2][4] = {{ 16384, 16384, 0, 0},
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{ -852, 17236, 17236, -852}};
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static const int8_t n_coef_hf[2] = { 3, 5 };
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static const int32_t coef_hf[2][5] = {{ -4096, 8192, -4096, 0, 0},
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{ 2032, -7602, 11140, -7602, 2032}};
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static const int16_t coef_hf[2][5] = {{ -2048, 4096, -2048, 0, 0},
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{ 1016, -3801, 5570, -3801, 1016}};
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typedef struct ThreadData {
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AVFrame *out, *cur, *adj;
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@ -256,12 +256,12 @@ static int deinterlace_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_
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}
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}
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/* save scaled result to the output frame, scaling down by 256 * 256 */
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/* save scaled result to the output frame, scaling down by 256 * 128 */
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work_pixel = s->work_line[jobnr];
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out_pixel = out_line;
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for (j = 0; j < linesize; j++, out_pixel++, work_pixel++)
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*out_pixel = av_clip(*work_pixel, 0, 255 * 256 * 256) >> 16;
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*out_pixel = av_clip(*work_pixel, 0, 255 * 256 * 128) >> 15;
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/* move on to next line */
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y_out += 2;
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