mirror of
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567 lines
24 KiB
C
567 lines
24 KiB
C
/*
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* Copyright (c) 2014 Clément Bœsch
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*
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* This file is part of FFmpeg.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/**
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* @file
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* hqx magnification filters (hq2x, hq3x, hq4x)
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*
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* Originally designed by Maxim Stephin.
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*
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* @see http://en.wikipedia.org/wiki/Hqx
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* @see http://web.archive.org/web/20131114143602/http://www.hiend3d.com/hq3x.html
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* @see http://blog.pkh.me/p/19-butchering-hqx-scaling-filters.html
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*/
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#include "libavutil/opt.h"
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#include "libavutil/avassert.h"
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#include "libavutil/pixdesc.h"
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#include "internal.h"
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typedef int (*hqxfunc_t)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
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typedef struct HQXContext {
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const AVClass *class;
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int n;
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hqxfunc_t func;
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uint32_t rgbtoyuv[1<<24];
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} HQXContext;
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typedef struct ThreadData {
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AVFrame *in, *out;
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const uint32_t *rgbtoyuv;
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} ThreadData;
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#define OFFSET(x) offsetof(HQXContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption hqx_options[] = {
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{ "n", "set scale factor", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 3}, 2, 4, .flags = FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(hqx);
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static av_always_inline uint32_t rgb2yuv(const uint32_t *r2y, uint32_t c)
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{
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return r2y[c & 0xffffff];
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}
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static av_always_inline int yuv_diff(uint32_t yuv1, uint32_t yuv2)
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{
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#define YMASK 0xff0000
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#define UMASK 0x00ff00
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#define VMASK 0x0000ff
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#define ABSDIFF(a,b) (abs((int)(a)-(int)(b)))
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return ABSDIFF(yuv1 & YMASK, yuv2 & YMASK) > (48 << 16) ||
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ABSDIFF(yuv1 & UMASK, yuv2 & UMASK) > ( 7 << 8) ||
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ABSDIFF(yuv1 & VMASK, yuv2 & VMASK) > ( 6 << 0);
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}
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/* (c1*w1 + c2*w2) >> s */
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static av_always_inline uint32_t interp_2px(uint32_t c1, int w1, uint32_t c2, int w2, int s)
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{
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return (((((c1 & 0xff00ff00) >> 8) * w1 + ((c2 & 0xff00ff00) >> 8) * w2) << (8 - s)) & 0xff00ff00) |
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(((((c1 & 0x00ff00ff) ) * w1 + ((c2 & 0x00ff00ff) ) * w2) >> s ) & 0x00ff00ff);
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}
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/* (c1*w1 + c2*w2 + c3*w3) >> s */
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static av_always_inline uint32_t interp_3px(uint32_t c1, int w1, uint32_t c2, int w2, uint32_t c3, int w3, int s)
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{
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return (((((c1 & 0xff00ff00) >> 8) * w1 + ((c2 & 0xff00ff00) >> 8) * w2 + ((c3 & 0xff00ff00) >> 8) * w3) << (8 - s)) & 0xff00ff00) |
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(((((c1 & 0x00ff00ff) ) * w1 + ((c2 & 0x00ff00ff) ) * w2 + ((c3 & 0x00ff00ff) ) * w3) >> s ) & 0x00ff00ff);
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}
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/* m is the mask of diff with the center pixel that matters in the pattern, and
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* r is the expected result (bit set to 1 if there is difference with the
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* center, 0 otherwise) */
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#define P(m, r) ((k_shuffled & (m)) == (r))
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/* adjust 012345678 to 01235678: the mask doesn't contain the (null) diff
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* between the center/current pixel and itself */
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#define DROP4(z) ((z) > 4 ? (z)-1 : (z))
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/* shuffle the input mask: move bit n (4-adjusted) to position stored in p<n> */
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#define SHF(x, rot, n) (((x) >> ((rot) ? 7-DROP4(n) : DROP4(n)) & 1) << DROP4(p##n))
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/* used to check if there is YUV difference between 2 pixels */
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#define WDIFF(c1, c2) yuv_diff(rgb2yuv(r2y, c1), rgb2yuv(r2y, c2))
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/* bootstrap template for every interpolation code. It defines the shuffled
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* masks and surrounding pixels. The rot flag is used to indicate if it's a
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* rotation; its basic effect is to shuffle k using p8..p0 instead of p0..p8 */
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#define INTERP_BOOTSTRAP(rot) \
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const int k_shuffled = SHF(k,rot,0) | SHF(k,rot,1) | SHF(k,rot,2) \
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| SHF(k,rot,3) | 0 | SHF(k,rot,5) \
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| SHF(k,rot,6) | SHF(k,rot,7) | SHF(k,rot,8); \
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\
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const uint32_t w0 = w[p0], w1 = w[p1], \
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w3 = w[p3], w4 = w[p4], w5 = w[p5], \
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w7 = w[p7]
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/* Assuming p0..p8 is mapped to pixels 0..8, this function interpolates the
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* top-left pixel in the total of the 2x2 pixels to interpolates. The function
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* is also used for the 3 other pixels */
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static av_always_inline uint32_t hq2x_interp_1x1(const uint32_t *r2y, int k,
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const uint32_t *w,
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int p0, int p1, int p2,
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int p3, int p4, int p5,
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int p6, int p7, int p8)
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{
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INTERP_BOOTSTRAP(0);
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if ((P(0xbf,0x37) || P(0xdb,0x13)) && WDIFF(w1, w5))
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return interp_2px(w4, 3, w3, 1, 2);
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if ((P(0xdb,0x49) || P(0xef,0x6d)) && WDIFF(w7, w3))
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return interp_2px(w4, 3, w1, 1, 2);
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if ((P(0x0b,0x0b) || P(0xfe,0x4a) || P(0xfe,0x1a)) && WDIFF(w3, w1))
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return w4;
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if ((P(0x6f,0x2a) || P(0x5b,0x0a) || P(0xbf,0x3a) || P(0xdf,0x5a) ||
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P(0x9f,0x8a) || P(0xcf,0x8a) || P(0xef,0x4e) || P(0x3f,0x0e) ||
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P(0xfb,0x5a) || P(0xbb,0x8a) || P(0x7f,0x5a) || P(0xaf,0x8a) ||
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P(0xeb,0x8a)) && WDIFF(w3, w1))
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return interp_2px(w4, 3, w0, 1, 2);
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if (P(0x0b,0x08))
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return interp_3px(w4, 2, w0, 1, w1, 1, 2);
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if (P(0x0b,0x02))
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return interp_3px(w4, 2, w0, 1, w3, 1, 2);
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if (P(0x2f,0x2f))
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return interp_3px(w4, 14, w3, 1, w1, 1, 4);
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if (P(0xbf,0x37) || P(0xdb,0x13))
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return interp_3px(w4, 5, w1, 2, w3, 1, 3);
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if (P(0xdb,0x49) || P(0xef,0x6d))
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return interp_3px(w4, 5, w3, 2, w1, 1, 3);
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if (P(0x1b,0x03) || P(0x4f,0x43) || P(0x8b,0x83) || P(0x6b,0x43))
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return interp_2px(w4, 3, w3, 1, 2);
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if (P(0x4b,0x09) || P(0x8b,0x89) || P(0x1f,0x19) || P(0x3b,0x19))
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return interp_2px(w4, 3, w1, 1, 2);
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if (P(0x7e,0x2a) || P(0xef,0xab) || P(0xbf,0x8f) || P(0x7e,0x0e))
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return interp_3px(w4, 2, w3, 3, w1, 3, 3);
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if (P(0xfb,0x6a) || P(0x6f,0x6e) || P(0x3f,0x3e) || P(0xfb,0xfa) ||
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P(0xdf,0xde) || P(0xdf,0x1e))
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return interp_2px(w4, 3, w0, 1, 2);
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if (P(0x0a,0x00) || P(0x4f,0x4b) || P(0x9f,0x1b) || P(0x2f,0x0b) ||
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P(0xbe,0x0a) || P(0xee,0x0a) || P(0x7e,0x0a) || P(0xeb,0x4b) ||
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P(0x3b,0x1b))
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return interp_3px(w4, 2, w3, 1, w1, 1, 2);
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return interp_3px(w4, 6, w3, 1, w1, 1, 3);
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}
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/* Assuming p0..p8 is mapped to pixels 0..8, this function interpolates the
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* top-left and top-center pixel in the total of the 3x3 pixels to
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* interpolates. The function is also used for the 3 other couples of pixels
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* defining the outline. The center pixel is not defined through this function,
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* since it's just the same as the original value. */
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static av_always_inline void hq3x_interp_2x1(uint32_t *dst, int dst_linesize,
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const uint32_t *r2y, int k,
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const uint32_t *w,
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int pos00, int pos01,
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int p0, int p1, int p2,
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int p3, int p4, int p5,
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int p6, int p7, int p8,
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int rotate)
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{
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INTERP_BOOTSTRAP(rotate);
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uint32_t *dst00 = &dst[dst_linesize*(pos00>>1) + (pos00&1)];
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uint32_t *dst01 = &dst[dst_linesize*(pos01>>1) + (pos01&1)];
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if ((P(0xdb,0x49) || P(0xef,0x6d)) && WDIFF(w7, w3))
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*dst00 = interp_2px(w4, 3, w1, 1, 2);
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else if ((P(0xbf,0x37) || P(0xdb,0x13)) && WDIFF(w1, w5))
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*dst00 = interp_2px(w4, 3, w3, 1, 2);
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else if ((P(0x0b,0x0b) || P(0xfe,0x4a) || P(0xfe,0x1a)) && WDIFF(w3, w1))
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*dst00 = w4;
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else if ((P(0x6f,0x2a) || P(0x5b,0x0a) || P(0xbf,0x3a) || P(0xdf,0x5a) ||
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P(0x9f,0x8a) || P(0xcf,0x8a) || P(0xef,0x4e) || P(0x3f,0x0e) ||
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P(0xfb,0x5a) || P(0xbb,0x8a) || P(0x7f,0x5a) || P(0xaf,0x8a) ||
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P(0xeb,0x8a)) && WDIFF(w3, w1))
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*dst00 = interp_2px(w4, 3, w0, 1, 2);
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else if (P(0x4b,0x09) || P(0x8b,0x89) || P(0x1f,0x19) || P(0x3b,0x19))
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*dst00 = interp_2px(w4, 3, w1, 1, 2);
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else if (P(0x1b,0x03) || P(0x4f,0x43) || P(0x8b,0x83) || P(0x6b,0x43))
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*dst00 = interp_2px(w4, 3, w3, 1, 2);
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else if (P(0x7e,0x2a) || P(0xef,0xab) || P(0xbf,0x8f) || P(0x7e,0x0e))
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*dst00 = interp_2px(w3, 1, w1, 1, 1);
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else if (P(0x4f,0x4b) || P(0x9f,0x1b) || P(0x2f,0x0b) || P(0xbe,0x0a) ||
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P(0xee,0x0a) || P(0x7e,0x0a) || P(0xeb,0x4b) || P(0x3b,0x1b))
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*dst00 = interp_3px(w4, 2, w3, 7, w1, 7, 4);
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else if (P(0x0b,0x08) || P(0xf9,0x68) || P(0xf3,0x62) || P(0x6d,0x6c) ||
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P(0x67,0x66) || P(0x3d,0x3c) || P(0x37,0x36) || P(0xf9,0xf8) ||
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P(0xdd,0xdc) || P(0xf3,0xf2) || P(0xd7,0xd6) || P(0xdd,0x1c) ||
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P(0xd7,0x16) || P(0x0b,0x02))
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*dst00 = interp_2px(w4, 3, w0, 1, 2);
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else
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*dst00 = interp_3px(w4, 2, w3, 1, w1, 1, 2);
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if ((P(0xfe,0xde) || P(0x9e,0x16) || P(0xda,0x12) || P(0x17,0x16) ||
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P(0x5b,0x12) || P(0xbb,0x12)) && WDIFF(w1, w5))
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*dst01 = w4;
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else if ((P(0x0f,0x0b) || P(0x5e,0x0a) || P(0xfb,0x7b) || P(0x3b,0x0b) ||
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P(0xbe,0x0a) || P(0x7a,0x0a)) && WDIFF(w3, w1))
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*dst01 = w4;
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else if (P(0xbf,0x8f) || P(0x7e,0x0e) || P(0xbf,0x37) || P(0xdb,0x13))
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*dst01 = interp_2px(w1, 3, w4, 1, 2);
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else if (P(0x02,0x00) || P(0x7c,0x28) || P(0xed,0xa9) || P(0xf5,0xb4) ||
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P(0xd9,0x90))
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*dst01 = interp_2px(w4, 3, w1, 1, 2);
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else if (P(0x4f,0x4b) || P(0xfb,0x7b) || P(0xfe,0x7e) || P(0x9f,0x1b) ||
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P(0x2f,0x0b) || P(0xbe,0x0a) || P(0x7e,0x0a) || P(0xfb,0x4b) ||
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P(0xfb,0xdb) || P(0xfe,0xde) || P(0xfe,0x56) || P(0x57,0x56) ||
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P(0x97,0x16) || P(0x3f,0x1e) || P(0xdb,0x12) || P(0xbb,0x12))
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*dst01 = interp_2px(w4, 7, w1, 1, 3);
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else
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*dst01 = w4;
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}
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/* Assuming p0..p8 is mapped to pixels 0..8, this function interpolates the
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* top-left block of 2x2 pixels in the total of the 4x4 pixels (or 4 blocks) to
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* interpolates. The function is also used for the 3 other blocks of 2x2
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* pixels. */
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static av_always_inline void hq4x_interp_2x2(uint32_t *dst, int dst_linesize,
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const uint32_t *r2y, int k,
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const uint32_t *w,
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int pos00, int pos01,
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int pos10, int pos11,
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int p0, int p1, int p2,
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int p3, int p4, int p5,
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int p6, int p7, int p8)
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{
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INTERP_BOOTSTRAP(0);
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uint32_t *dst00 = &dst[dst_linesize*(pos00>>1) + (pos00&1)];
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uint32_t *dst01 = &dst[dst_linesize*(pos01>>1) + (pos01&1)];
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uint32_t *dst10 = &dst[dst_linesize*(pos10>>1) + (pos10&1)];
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uint32_t *dst11 = &dst[dst_linesize*(pos11>>1) + (pos11&1)];
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const int cond00 = (P(0xbf,0x37) || P(0xdb,0x13)) && WDIFF(w1, w5);
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const int cond01 = (P(0xdb,0x49) || P(0xef,0x6d)) && WDIFF(w7, w3);
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const int cond02 = (P(0x6f,0x2a) || P(0x5b,0x0a) || P(0xbf,0x3a) ||
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P(0xdf,0x5a) || P(0x9f,0x8a) || P(0xcf,0x8a) ||
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P(0xef,0x4e) || P(0x3f,0x0e) || P(0xfb,0x5a) ||
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P(0xbb,0x8a) || P(0x7f,0x5a) || P(0xaf,0x8a) ||
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P(0xeb,0x8a)) && WDIFF(w3, w1);
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const int cond03 = P(0xdb,0x49) || P(0xef,0x6d);
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const int cond04 = P(0xbf,0x37) || P(0xdb,0x13);
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const int cond05 = P(0x1b,0x03) || P(0x4f,0x43) || P(0x8b,0x83) ||
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P(0x6b,0x43);
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const int cond06 = P(0x4b,0x09) || P(0x8b,0x89) || P(0x1f,0x19) ||
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P(0x3b,0x19);
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const int cond07 = P(0x0b,0x08) || P(0xf9,0x68) || P(0xf3,0x62) ||
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P(0x6d,0x6c) || P(0x67,0x66) || P(0x3d,0x3c) ||
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P(0x37,0x36) || P(0xf9,0xf8) || P(0xdd,0xdc) ||
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P(0xf3,0xf2) || P(0xd7,0xd6) || P(0xdd,0x1c) ||
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P(0xd7,0x16) || P(0x0b,0x02);
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const int cond08 = (P(0x0f,0x0b) || P(0x2b,0x0b) || P(0xfe,0x4a) ||
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P(0xfe,0x1a)) && WDIFF(w3, w1);
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const int cond09 = P(0x2f,0x2f);
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const int cond10 = P(0x0a,0x00);
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const int cond11 = P(0x0b,0x09);
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const int cond12 = P(0x7e,0x2a) || P(0xef,0xab);
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const int cond13 = P(0xbf,0x8f) || P(0x7e,0x0e);
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const int cond14 = P(0x4f,0x4b) || P(0x9f,0x1b) || P(0x2f,0x0b) ||
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P(0xbe,0x0a) || P(0xee,0x0a) || P(0x7e,0x0a) ||
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P(0xeb,0x4b) || P(0x3b,0x1b);
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const int cond15 = P(0x0b,0x03);
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if (cond00)
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*dst00 = interp_2px(w4, 5, w3, 3, 3);
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else if (cond01)
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*dst00 = interp_2px(w4, 5, w1, 3, 3);
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else if ((P(0x0b,0x0b) || P(0xfe,0x4a) || P(0xfe,0x1a)) && WDIFF(w3, w1))
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*dst00 = w4;
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else if (cond02)
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*dst00 = interp_2px(w4, 5, w0, 3, 3);
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else if (cond03)
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*dst00 = interp_2px(w4, 3, w3, 1, 2);
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else if (cond04)
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*dst00 = interp_2px(w4, 3, w1, 1, 2);
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else if (cond05)
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*dst00 = interp_2px(w4, 5, w3, 3, 3);
|
|
else if (cond06)
|
|
*dst00 = interp_2px(w4, 5, w1, 3, 3);
|
|
else if (P(0x0f,0x0b) || P(0x5e,0x0a) || P(0x2b,0x0b) || P(0xbe,0x0a) ||
|
|
P(0x7a,0x0a) || P(0xee,0x0a))
|
|
*dst00 = interp_2px(w1, 1, w3, 1, 1);
|
|
else if (cond07)
|
|
*dst00 = interp_2px(w4, 5, w0, 3, 3);
|
|
else
|
|
*dst00 = interp_3px(w4, 2, w1, 1, w3, 1, 2);
|
|
|
|
if (cond00)
|
|
*dst01 = interp_2px(w4, 7, w3, 1, 3);
|
|
else if (cond08)
|
|
*dst01 = w4;
|
|
else if (cond02)
|
|
*dst01 = interp_2px(w4, 3, w0, 1, 2);
|
|
else if (cond09)
|
|
*dst01 = w4;
|
|
else if (cond10)
|
|
*dst01 = interp_3px(w4, 5, w1, 2, w3, 1, 3);
|
|
else if (P(0x0b,0x08))
|
|
*dst01 = interp_3px(w4, 5, w1, 2, w0, 1, 3);
|
|
else if (cond11)
|
|
*dst01 = interp_2px(w4, 5, w1, 3, 3);
|
|
else if (cond04)
|
|
*dst01 = interp_2px(w1, 3, w4, 1, 2);
|
|
else if (cond12)
|
|
*dst01 = interp_3px(w1, 2, w4, 1, w3, 1, 2);
|
|
else if (cond13)
|
|
*dst01 = interp_2px(w1, 5, w3, 3, 3);
|
|
else if (cond05)
|
|
*dst01 = interp_2px(w4, 7, w3, 1, 3);
|
|
else if (P(0xf3,0x62) || P(0x67,0x66) || P(0x37,0x36) || P(0xf3,0xf2) ||
|
|
P(0xd7,0xd6) || P(0xd7,0x16) || P(0x0b,0x02))
|
|
*dst01 = interp_2px(w4, 3, w0, 1, 2);
|
|
else if (cond14)
|
|
*dst01 = interp_2px(w1, 1, w4, 1, 1);
|
|
else
|
|
*dst01 = interp_2px(w4, 3, w1, 1, 2);
|
|
|
|
if (cond01)
|
|
*dst10 = interp_2px(w4, 7, w1, 1, 3);
|
|
else if (cond08)
|
|
*dst10 = w4;
|
|
else if (cond02)
|
|
*dst10 = interp_2px(w4, 3, w0, 1, 2);
|
|
else if (cond09)
|
|
*dst10 = w4;
|
|
else if (cond10)
|
|
*dst10 = interp_3px(w4, 5, w3, 2, w1, 1, 3);
|
|
else if (P(0x0b,0x02))
|
|
*dst10 = interp_3px(w4, 5, w3, 2, w0, 1, 3);
|
|
else if (cond15)
|
|
*dst10 = interp_2px(w4, 5, w3, 3, 3);
|
|
else if (cond03)
|
|
*dst10 = interp_2px(w3, 3, w4, 1, 2);
|
|
else if (cond13)
|
|
*dst10 = interp_3px(w3, 2, w4, 1, w1, 1, 2);
|
|
else if (cond12)
|
|
*dst10 = interp_2px(w3, 5, w1, 3, 3);
|
|
else if (cond06)
|
|
*dst10 = interp_2px(w4, 7, w1, 1, 3);
|
|
else if (P(0x0b,0x08) || P(0xf9,0x68) || P(0x6d,0x6c) || P(0x3d,0x3c) ||
|
|
P(0xf9,0xf8) || P(0xdd,0xdc) || P(0xdd,0x1c))
|
|
*dst10 = interp_2px(w4, 3, w0, 1, 2);
|
|
else if (cond14)
|
|
*dst10 = interp_2px(w3, 1, w4, 1, 1);
|
|
else
|
|
*dst10 = interp_2px(w4, 3, w3, 1, 2);
|
|
|
|
if ((P(0x7f,0x2b) || P(0xef,0xab) || P(0xbf,0x8f) || P(0x7f,0x0f)) &&
|
|
WDIFF(w3, w1))
|
|
*dst11 = w4;
|
|
else if (cond02)
|
|
*dst11 = interp_2px(w4, 7, w0, 1, 3);
|
|
else if (cond15)
|
|
*dst11 = interp_2px(w4, 7, w3, 1, 3);
|
|
else if (cond11)
|
|
*dst11 = interp_2px(w4, 7, w1, 1, 3);
|
|
else if (P(0x0a,0x00) || P(0x7e,0x2a) || P(0xef,0xab) || P(0xbf,0x8f) ||
|
|
P(0x7e,0x0e))
|
|
*dst11 = interp_3px(w4, 6, w3, 1, w1, 1, 3);
|
|
else if (cond07)
|
|
*dst11 = interp_2px(w4, 7, w0, 1, 3);
|
|
else
|
|
*dst11 = w4;
|
|
}
|
|
|
|
static av_always_inline void hqx_filter(const ThreadData *td, int jobnr, int nb_jobs, int n)
|
|
{
|
|
int x, y;
|
|
AVFrame *in = td->in, *out = td->out;
|
|
const uint32_t *r2y = td->rgbtoyuv;
|
|
const int height = in->height;
|
|
const int width = in->width;
|
|
const int slice_start = (height * jobnr ) / nb_jobs;
|
|
const int slice_end = (height * (jobnr+1)) / nb_jobs;
|
|
const int dst_linesize = out->linesize[0];
|
|
const int src_linesize = in->linesize[0];
|
|
uint8_t *dst = out->data[0] + slice_start * dst_linesize * n;
|
|
const uint8_t *src = in->data[0] + slice_start * src_linesize;
|
|
|
|
const int dst32_linesize = dst_linesize >> 2;
|
|
const int src32_linesize = src_linesize >> 2;
|
|
|
|
for (y = slice_start; y < slice_end; y++) {
|
|
const uint32_t *src32 = (const uint32_t *)src;
|
|
uint32_t *dst32 = (uint32_t *)dst;
|
|
const int prevline = y > 0 ? -src32_linesize : 0;
|
|
const int nextline = y < height - 1 ? src32_linesize : 0;
|
|
|
|
for (x = 0; x < width; x++) {
|
|
const int prevcol = x > 0 ? -1 : 0;
|
|
const int nextcol = x < width -1 ? 1 : 0;
|
|
const uint32_t w[3*3] = {
|
|
src32[prevcol + prevline], src32[prevline], src32[prevline + nextcol],
|
|
src32[prevcol ], src32[ 0], src32[ nextcol],
|
|
src32[prevcol + nextline], src32[nextline], src32[nextline + nextcol]
|
|
};
|
|
const uint32_t yuv1 = rgb2yuv(r2y, w[4]);
|
|
const int pattern = (w[4] != w[0] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[0]))) : 0)
|
|
| (w[4] != w[1] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[1]))) : 0) << 1
|
|
| (w[4] != w[2] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[2]))) : 0) << 2
|
|
| (w[4] != w[3] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[3]))) : 0) << 3
|
|
| (w[4] != w[5] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[5]))) : 0) << 4
|
|
| (w[4] != w[6] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[6]))) : 0) << 5
|
|
| (w[4] != w[7] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[7]))) : 0) << 6
|
|
| (w[4] != w[8] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[8]))) : 0) << 7;
|
|
|
|
if (n == 2) {
|
|
dst32[dst32_linesize*0 + 0] = hq2x_interp_1x1(r2y, pattern, w, 0,1,2,3,4,5,6,7,8); // 00
|
|
dst32[dst32_linesize*0 + 1] = hq2x_interp_1x1(r2y, pattern, w, 2,1,0,5,4,3,8,7,6); // 01 (vert mirrored)
|
|
dst32[dst32_linesize*1 + 0] = hq2x_interp_1x1(r2y, pattern, w, 6,7,8,3,4,5,0,1,2); // 10 (horiz mirrored)
|
|
dst32[dst32_linesize*1 + 1] = hq2x_interp_1x1(r2y, pattern, w, 8,7,6,5,4,3,2,1,0); // 11 (center mirrored)
|
|
} else if (n == 3) {
|
|
hq3x_interp_2x1(dst32, dst32_linesize, r2y, pattern, w, 0,1, 0,1,2,3,4,5,6,7,8, 0); // 00 01
|
|
hq3x_interp_2x1(dst32 + 1, dst32_linesize, r2y, pattern, w, 1,3, 2,5,8,1,4,7,0,3,6, 1); // 02 12 (rotated to the right)
|
|
hq3x_interp_2x1(dst32 + 1*dst32_linesize, dst32_linesize, r2y, pattern, w, 2,0, 6,3,0,7,4,1,8,5,2, 1); // 20 10 (rotated to the left)
|
|
hq3x_interp_2x1(dst32 + 1*dst32_linesize + 1, dst32_linesize, r2y, pattern, w, 3,2, 8,7,6,5,4,3,2,1,0, 0); // 22 21 (center mirrored)
|
|
dst32[dst32_linesize + 1] = w[4]; // 11
|
|
} else if (n == 4) {
|
|
hq4x_interp_2x2(dst32, dst32_linesize, r2y, pattern, w, 0,1,2,3, 0,1,2,3,4,5,6,7,8); // 00 01 10 11
|
|
hq4x_interp_2x2(dst32 + 2, dst32_linesize, r2y, pattern, w, 1,0,3,2, 2,1,0,5,4,3,8,7,6); // 02 03 12 13 (vert mirrored)
|
|
hq4x_interp_2x2(dst32 + 2*dst32_linesize, dst32_linesize, r2y, pattern, w, 2,3,0,1, 6,7,8,3,4,5,0,1,2); // 20 21 30 31 (horiz mirrored)
|
|
hq4x_interp_2x2(dst32 + 2*dst32_linesize + 2, dst32_linesize, r2y, pattern, w, 3,2,1,0, 8,7,6,5,4,3,2,1,0); // 22 23 32 33 (center mirrored)
|
|
} else {
|
|
av_assert0(0);
|
|
}
|
|
|
|
src32 += 1;
|
|
dst32 += n;
|
|
}
|
|
|
|
src += src_linesize;
|
|
dst += dst_linesize * n;
|
|
}
|
|
}
|
|
|
|
#define HQX_FUNC(size) \
|
|
static int hq##size##x(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
|
|
{ \
|
|
hqx_filter(arg, jobnr, nb_jobs, size); \
|
|
return 0; \
|
|
}
|
|
|
|
HQX_FUNC(2)
|
|
HQX_FUNC(3)
|
|
HQX_FUNC(4)
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
static const enum AVPixelFormat pix_fmts[] = {AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE};
|
|
AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
|
|
if (!fmts_list)
|
|
return AVERROR(ENOMEM);
|
|
return ff_set_common_formats(ctx, fmts_list);
|
|
}
|
|
|
|
static int config_output(AVFilterLink *outlink)
|
|
{
|
|
AVFilterContext *ctx = outlink->src;
|
|
HQXContext *hqx = ctx->priv;
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
|
|
outlink->w = inlink->w * hqx->n;
|
|
outlink->h = inlink->h * hqx->n;
|
|
av_log(inlink->dst, AV_LOG_VERBOSE, "fmt:%s size:%dx%d -> size:%dx%d\n",
|
|
av_get_pix_fmt_name(inlink->format),
|
|
inlink->w, inlink->h, outlink->w, outlink->h);
|
|
return 0;
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
HQXContext *hqx = ctx->priv;
|
|
ThreadData td;
|
|
AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!out) {
|
|
av_frame_free(&in);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
av_frame_copy_props(out, in);
|
|
out->width = outlink->w;
|
|
out->height = outlink->h;
|
|
|
|
td.in = in;
|
|
td.out = out;
|
|
td.rgbtoyuv = hqx->rgbtoyuv;
|
|
ctx->internal->execute(ctx, hqx->func, &td, NULL, FFMIN(inlink->h, ff_filter_get_nb_threads(ctx)));
|
|
|
|
av_frame_free(&in);
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
|
|
static av_cold int init(AVFilterContext *ctx)
|
|
{
|
|
HQXContext *hqx = ctx->priv;
|
|
static const hqxfunc_t hqxfuncs[] = {hq2x, hq3x, hq4x};
|
|
|
|
uint32_t c;
|
|
int bg, rg, g;
|
|
|
|
for (bg=-255; bg<256; bg++) {
|
|
for (rg=-255; rg<256; rg++) {
|
|
const uint32_t u = (uint32_t)((-169*rg + 500*bg)/1000) + 128;
|
|
const uint32_t v = (uint32_t)(( 500*rg - 81*bg)/1000) + 128;
|
|
int startg = FFMAX3(-bg, -rg, 0);
|
|
int endg = FFMIN3(255-bg, 255-rg, 255);
|
|
uint32_t y = (uint32_t)(( 299*rg + 1000*startg + 114*bg)/1000);
|
|
c = bg + (rg<<16) + 0x010101 * startg;
|
|
for (g = startg; g <= endg; g++) {
|
|
hqx->rgbtoyuv[c] = ((y++) << 16) + (u << 8) + v;
|
|
c+= 0x010101;
|
|
}
|
|
}
|
|
}
|
|
|
|
hqx->func = hqxfuncs[hqx->n - 2];
|
|
return 0;
|
|
}
|
|
|
|
static const AVFilterPad hqx_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad hqx_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter ff_vf_hqx = {
|
|
.name = "hqx",
|
|
.description = NULL_IF_CONFIG_SMALL("Scale the input by 2, 3 or 4 using the hq*x magnification algorithm."),
|
|
.priv_size = sizeof(HQXContext),
|
|
.init = init,
|
|
.query_formats = query_formats,
|
|
.inputs = hqx_inputs,
|
|
.outputs = hqx_outputs,
|
|
.priv_class = &hqx_class,
|
|
.flags = AVFILTER_FLAG_SLICE_THREADS,
|
|
};
|