2 * Copyright (c) 2012 Jeremy Tran
3 * Copyright (c) 2004 Tobias Diedrich
4 * Copyright (c) 2003 Donald A. Graft
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 * Ported from MPlayer libmpcodecs/vf_kerndeint.c.
29 #include "libavutil/imgutils.h"
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/pixdesc.h"
40 int frame; ///< frame count, starting from 0
41 int thresh, map, order, sharp, twoway;
44 uint8_t *tmp_data [4]; ///< temporary plane data buffer
45 int tmp_linesize[4]; ///< temporary plane byte linesize
46 int tmp_bwidth [4]; ///< temporary plane byte width
49 #define OFFSET(x) offsetof(KerndeintContext, x)
50 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
51 static const AVOption kerndeint_options[] = {
52 { "thresh", "set the threshold", OFFSET(thresh), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, FLAGS },
53 { "map", "set the map", OFFSET(map), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
54 { "order", "set the order", OFFSET(order), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
55 { "sharp", "enable sharpening", OFFSET(sharp), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
56 { "twoway", "enable twoway", OFFSET(twoway), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
60 AVFILTER_DEFINE_CLASS(kerndeint);
62 static av_cold int init(AVFilterContext *ctx, const char *args)
64 KerndeintContext *kerndeint = ctx->priv;
65 const char const * shorthand[] = { "thresh", "map", "order", "sharp", "twoway", NULL };
67 kerndeint->class = &kerndeint_class;
68 av_opt_set_defaults(kerndeint);
70 return av_opt_set_from_string(kerndeint, args, shorthand, "=", ":");
73 static av_cold void uninit(AVFilterContext *ctx)
75 KerndeintContext *kerndeint = ctx->priv;
77 av_free(kerndeint->tmp_data[0]);
78 av_opt_free(kerndeint);
81 static int query_formats(AVFilterContext *ctx)
83 static const enum PixelFormat pix_fmts[] = {
86 AV_PIX_FMT_ARGB, AV_PIX_FMT_0RGB,
87 AV_PIX_FMT_ABGR, AV_PIX_FMT_0BGR,
88 AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB0,
89 AV_PIX_FMT_BGRA, AV_PIX_FMT_BGR0,
93 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
98 static int config_props(AVFilterLink *inlink)
100 KerndeintContext *kerndeint = inlink->dst->priv;
101 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
104 kerndeint->is_packed_rgb = av_pix_fmt_desc_get(inlink->format)->flags & PIX_FMT_RGB;
105 kerndeint->vsub = desc->log2_chroma_h;
107 ret = av_image_alloc(kerndeint->tmp_data, kerndeint->tmp_linesize,
108 inlink->w, inlink->h, inlink->format, 16);
111 memset(kerndeint->tmp_data[0], 0, ret);
113 if ((ret = av_image_fill_linesizes(kerndeint->tmp_bwidth, inlink->format, inlink->w)) < 0)
119 static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *inpic)
121 KerndeintContext *kerndeint = inlink->dst->priv;
122 AVFilterLink *outlink = inlink->dst->outputs[0];
123 AVFilterBufferRef *outpic;
124 const uint8_t *prvp; ///< Previous field's pixel line number n
125 const uint8_t *prvpp; ///< Previous field's pixel line number (n - 1)
126 const uint8_t *prvpn; ///< Previous field's pixel line number (n + 1)
127 const uint8_t *prvppp; ///< Previous field's pixel line number (n - 2)
128 const uint8_t *prvpnn; ///< Previous field's pixel line number (n + 2)
129 const uint8_t *prvp4p; ///< Previous field's pixel line number (n - 4)
130 const uint8_t *prvp4n; ///< Previous field's pixel line number (n + 4)
132 const uint8_t *srcp; ///< Current field's pixel line number n
133 const uint8_t *srcpp; ///< Current field's pixel line number (n - 1)
134 const uint8_t *srcpn; ///< Current field's pixel line number (n + 1)
135 const uint8_t *srcppp; ///< Current field's pixel line number (n - 2)
136 const uint8_t *srcpnn; ///< Current field's pixel line number (n + 2)
137 const uint8_t *srcp3p; ///< Current field's pixel line number (n - 3)
138 const uint8_t *srcp3n; ///< Current field's pixel line number (n + 3)
139 const uint8_t *srcp4p; ///< Current field's pixel line number (n - 4)
140 const uint8_t *srcp4n; ///< Current field's pixel line number (n + 4)
142 uint8_t *dstp, *dstp_saved;
143 const uint8_t *srcp_saved;
145 int src_linesize, psrc_linesize, dst_linesize, bwidth;
146 int x, y, plane, val, hi, lo, g, h, n = kerndeint->frame++;
149 const int thresh = kerndeint->thresh;
150 const int order = kerndeint->order;
151 const int map = kerndeint->map;
152 const int sharp = kerndeint->sharp;
153 const int twoway = kerndeint->twoway;
155 const int is_packed_rgb = kerndeint->is_packed_rgb;
157 outpic = ff_get_video_buffer(outlink, AV_PERM_WRITE|AV_PERM_ALIGN, outlink->w, outlink->h);
159 avfilter_unref_bufferp(&inpic);
160 return AVERROR(ENOMEM);
162 avfilter_copy_buffer_ref_props(outpic, inpic);
163 outpic->video->interlaced = 0;
165 for (plane = 0; inpic->data[plane] && plane < 4; plane++) {
166 h = plane == 0 ? inlink->h : inlink->h >> kerndeint->vsub;
167 bwidth = kerndeint->tmp_bwidth[plane];
169 srcp = srcp_saved = inpic->data[plane];
170 src_linesize = inpic->linesize[plane];
171 psrc_linesize = kerndeint->tmp_linesize[plane];
172 dstp = dstp_saved = outpic->data[plane];
173 dst_linesize = outpic->linesize[plane];
174 srcp = srcp_saved + (1 - order) * src_linesize;
175 dstp = dstp_saved + (1 - order) * dst_linesize;
177 for (y = 0; y < h; y += 2) {
178 memcpy(dstp, srcp, bwidth);
179 srcp += 2 * src_linesize;
180 dstp += 2 * dst_linesize;
183 // Copy through the lines that will be missed below.
184 memcpy(dstp_saved + order * dst_linesize, srcp_saved + (1 - order) * src_linesize, bwidth);
185 memcpy(dstp_saved + (2 + order ) * dst_linesize, srcp_saved + (3 - order) * src_linesize, bwidth);
186 memcpy(dstp_saved + (h - 2 + order) * dst_linesize, srcp_saved + (h - 1 - order) * src_linesize, bwidth);
187 memcpy(dstp_saved + (h - 4 + order) * dst_linesize, srcp_saved + (h - 3 - order) * src_linesize, bwidth);
189 /* For the other field choose adaptively between using the previous field
190 or the interpolant from the current field. */
191 prvp = kerndeint->tmp_data[plane] + 5 * psrc_linesize - (1 - order) * psrc_linesize;
192 prvpp = prvp - psrc_linesize;
193 prvppp = prvp - 2 * psrc_linesize;
194 prvp4p = prvp - 4 * psrc_linesize;
195 prvpn = prvp + psrc_linesize;
196 prvpnn = prvp + 2 * psrc_linesize;
197 prvp4n = prvp + 4 * psrc_linesize;
199 srcp = srcp_saved + 5 * src_linesize - (1 - order) * src_linesize;
200 srcpp = srcp - src_linesize;
201 srcppp = srcp - 2 * src_linesize;
202 srcp3p = srcp - 3 * src_linesize;
203 srcp4p = srcp - 4 * src_linesize;
205 srcpn = srcp + src_linesize;
206 srcpnn = srcp + 2 * src_linesize;
207 srcp3n = srcp + 3 * src_linesize;
208 srcp4n = srcp + 4 * src_linesize;
210 dstp = dstp_saved + 5 * dst_linesize - (1 - order) * dst_linesize;
212 for (y = 5 - (1 - order); y <= h - 5 - (1 - order); y += 2) {
213 for (x = 0; x < bwidth; x++) {
214 if (thresh == 0 || n == 0 ||
215 (abs((int)prvp[x] - (int)srcp[x]) > thresh) ||
216 (abs((int)prvpp[x] - (int)srcpp[x]) > thresh) ||
217 (abs((int)prvpn[x] - (int)srcpn[x]) > thresh)) {
222 AV_WB32(dstp + g, 0xffffffff);
224 } else if (inlink->format == AV_PIX_FMT_YUYV422) {
225 // y <- 235, u <- 128, y <- 235, v <- 128
226 AV_WB32(dstp + g, 0xeb80eb80);
229 dstp[x] = plane == 0 ? 235 : 128;
235 } else if (inlink->format == AV_PIX_FMT_YUYV422) {
236 hi = x & 1 ? 240 : 235;
239 hi = plane == 0 ? 235 : 240;
245 valf = + 0.526 * ((int)srcpp[x] + (int)srcpn[x])
246 + 0.170 * ((int)srcp[x] + (int)prvp[x])
247 - 0.116 * ((int)srcppp[x] + (int)srcpnn[x] + (int)prvppp[x] + (int)prvpnn[x])
248 - 0.026 * ((int)srcp3p[x] + (int)srcp3n[x])
249 + 0.031 * ((int)srcp4p[x] + (int)srcp4n[x] + (int)prvp4p[x] + (int)prvp4n[x]);
251 valf = + 0.526 * ((int)srcpp[x] + (int)srcpn[x])
252 + 0.170 * ((int)prvp[x])
253 - 0.116 * ((int)prvppp[x] + (int)prvpnn[x])
254 - 0.026 * ((int)srcp3p[x] + (int)srcp3n[x])
255 + 0.031 * ((int)prvp4p[x] + (int)prvp4p[x]);
257 dstp[x] = av_clip(valf, lo, hi);
260 val = (8 * ((int)srcpp[x] + (int)srcpn[x]) + 2 * ((int)srcp[x] + (int)prvp[x])
261 - (int)(srcppp[x]) - (int)(srcpnn[x])
262 - (int)(prvppp[x]) - (int)(prvpnn[x])) >> 4;
264 val = (8 * ((int)srcpp[x] + (int)srcpn[x]) + 2 * ((int)prvp[x])
265 - (int)(prvppp[x]) - (int)(prvpnn[x])) >> 4;
267 dstp[x] = av_clip(val, lo, hi);
274 prvp += 2 * psrc_linesize;
275 prvpp += 2 * psrc_linesize;
276 prvppp += 2 * psrc_linesize;
277 prvpn += 2 * psrc_linesize;
278 prvpnn += 2 * psrc_linesize;
279 prvp4p += 2 * psrc_linesize;
280 prvp4n += 2 * psrc_linesize;
281 srcp += 2 * src_linesize;
282 srcpp += 2 * src_linesize;
283 srcppp += 2 * src_linesize;
284 srcp3p += 2 * src_linesize;
285 srcp4p += 2 * src_linesize;
286 srcpn += 2 * src_linesize;
287 srcpnn += 2 * src_linesize;
288 srcp3n += 2 * src_linesize;
289 srcp4n += 2 * src_linesize;
290 dstp += 2 * dst_linesize;
293 srcp = inpic->data[plane];
294 dstp = kerndeint->tmp_data[plane];
295 av_image_copy_plane(dstp, psrc_linesize, srcp, src_linesize, bwidth, h);
298 avfilter_unref_buffer(inpic);
299 return ff_filter_frame(outlink, outpic);
302 static const AVFilterPad kerndeint_inputs[] = {
305 .type = AVMEDIA_TYPE_VIDEO,
306 .filter_frame = filter_frame,
307 .config_props = config_props,
308 .min_perms = AV_PERM_READ,
313 static const AVFilterPad kerndeint_outputs[] = {
316 .type = AVMEDIA_TYPE_VIDEO,
321 AVFilter avfilter_vf_kerndeint = {
323 .description = NULL_IF_CONFIG_SMALL("Apply kernel deinterlacing to the input."),
324 .priv_size = sizeof(KerndeintContext),
327 .query_formats = query_formats,
329 .inputs = kerndeint_inputs,
330 .outputs = kerndeint_outputs,
332 .priv_class = &kerndeint_class,