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 void uninit(AVFilterContext *ctx)
64 KerndeintContext *kerndeint = ctx->priv;
66 av_free(kerndeint->tmp_data[0]);
69 static int query_formats(AVFilterContext *ctx)
71 static const enum PixelFormat pix_fmts[] = {
74 AV_PIX_FMT_ARGB, AV_PIX_FMT_0RGB,
75 AV_PIX_FMT_ABGR, AV_PIX_FMT_0BGR,
76 AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB0,
77 AV_PIX_FMT_BGRA, AV_PIX_FMT_BGR0,
81 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
86 static int config_props(AVFilterLink *inlink)
88 KerndeintContext *kerndeint = inlink->dst->priv;
89 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
92 kerndeint->is_packed_rgb = av_pix_fmt_desc_get(inlink->format)->flags & PIX_FMT_RGB;
93 kerndeint->vsub = desc->log2_chroma_h;
95 ret = av_image_alloc(kerndeint->tmp_data, kerndeint->tmp_linesize,
96 inlink->w, inlink->h, inlink->format, 16);
99 memset(kerndeint->tmp_data[0], 0, ret);
101 if ((ret = av_image_fill_linesizes(kerndeint->tmp_bwidth, inlink->format, inlink->w)) < 0)
107 static int filter_frame(AVFilterLink *inlink, AVFrame *inpic)
109 KerndeintContext *kerndeint = inlink->dst->priv;
110 AVFilterLink *outlink = inlink->dst->outputs[0];
112 const uint8_t *prvp; ///< Previous field's pixel line number n
113 const uint8_t *prvpp; ///< Previous field's pixel line number (n - 1)
114 const uint8_t *prvpn; ///< Previous field's pixel line number (n + 1)
115 const uint8_t *prvppp; ///< Previous field's pixel line number (n - 2)
116 const uint8_t *prvpnn; ///< Previous field's pixel line number (n + 2)
117 const uint8_t *prvp4p; ///< Previous field's pixel line number (n - 4)
118 const uint8_t *prvp4n; ///< Previous field's pixel line number (n + 4)
120 const uint8_t *srcp; ///< Current field's pixel line number n
121 const uint8_t *srcpp; ///< Current field's pixel line number (n - 1)
122 const uint8_t *srcpn; ///< Current field's pixel line number (n + 1)
123 const uint8_t *srcppp; ///< Current field's pixel line number (n - 2)
124 const uint8_t *srcpnn; ///< Current field's pixel line number (n + 2)
125 const uint8_t *srcp3p; ///< Current field's pixel line number (n - 3)
126 const uint8_t *srcp3n; ///< Current field's pixel line number (n + 3)
127 const uint8_t *srcp4p; ///< Current field's pixel line number (n - 4)
128 const uint8_t *srcp4n; ///< Current field's pixel line number (n + 4)
130 uint8_t *dstp, *dstp_saved;
131 const uint8_t *srcp_saved;
133 int src_linesize, psrc_linesize, dst_linesize, bwidth;
134 int x, y, plane, val, hi, lo, g, h, n = kerndeint->frame++;
137 const int thresh = kerndeint->thresh;
138 const int order = kerndeint->order;
139 const int map = kerndeint->map;
140 const int sharp = kerndeint->sharp;
141 const int twoway = kerndeint->twoway;
143 const int is_packed_rgb = kerndeint->is_packed_rgb;
145 outpic = ff_get_video_buffer(outlink, outlink->w, outlink->h);
147 av_frame_free(&inpic);
148 return AVERROR(ENOMEM);
150 av_frame_copy_props(outpic, inpic);
151 outpic->interlaced_frame = 0;
153 for (plane = 0; inpic->data[plane] && plane < 4; plane++) {
154 h = plane == 0 ? inlink->h : inlink->h >> kerndeint->vsub;
155 bwidth = kerndeint->tmp_bwidth[plane];
157 srcp = srcp_saved = inpic->data[plane];
158 src_linesize = inpic->linesize[plane];
159 psrc_linesize = kerndeint->tmp_linesize[plane];
160 dstp = dstp_saved = outpic->data[plane];
161 dst_linesize = outpic->linesize[plane];
162 srcp = srcp_saved + (1 - order) * src_linesize;
163 dstp = dstp_saved + (1 - order) * dst_linesize;
165 for (y = 0; y < h; y += 2) {
166 memcpy(dstp, srcp, bwidth);
167 srcp += 2 * src_linesize;
168 dstp += 2 * dst_linesize;
171 // Copy through the lines that will be missed below.
172 memcpy(dstp_saved + order * dst_linesize, srcp_saved + (1 - order) * src_linesize, bwidth);
173 memcpy(dstp_saved + (2 + order ) * dst_linesize, srcp_saved + (3 - order) * src_linesize, bwidth);
174 memcpy(dstp_saved + (h - 2 + order) * dst_linesize, srcp_saved + (h - 1 - order) * src_linesize, bwidth);
175 memcpy(dstp_saved + (h - 4 + order) * dst_linesize, srcp_saved + (h - 3 - order) * src_linesize, bwidth);
177 /* For the other field choose adaptively between using the previous field
178 or the interpolant from the current field. */
179 prvp = kerndeint->tmp_data[plane] + 5 * psrc_linesize - (1 - order) * psrc_linesize;
180 prvpp = prvp - psrc_linesize;
181 prvppp = prvp - 2 * psrc_linesize;
182 prvp4p = prvp - 4 * psrc_linesize;
183 prvpn = prvp + psrc_linesize;
184 prvpnn = prvp + 2 * psrc_linesize;
185 prvp4n = prvp + 4 * psrc_linesize;
187 srcp = srcp_saved + 5 * src_linesize - (1 - order) * src_linesize;
188 srcpp = srcp - src_linesize;
189 srcppp = srcp - 2 * src_linesize;
190 srcp3p = srcp - 3 * src_linesize;
191 srcp4p = srcp - 4 * src_linesize;
193 srcpn = srcp + src_linesize;
194 srcpnn = srcp + 2 * src_linesize;
195 srcp3n = srcp + 3 * src_linesize;
196 srcp4n = srcp + 4 * src_linesize;
198 dstp = dstp_saved + 5 * dst_linesize - (1 - order) * dst_linesize;
200 for (y = 5 - (1 - order); y <= h - 5 - (1 - order); y += 2) {
201 for (x = 0; x < bwidth; x++) {
202 if (thresh == 0 || n == 0 ||
203 (abs((int)prvp[x] - (int)srcp[x]) > thresh) ||
204 (abs((int)prvpp[x] - (int)srcpp[x]) > thresh) ||
205 (abs((int)prvpn[x] - (int)srcpn[x]) > thresh)) {
210 AV_WB32(dstp + g, 0xffffffff);
212 } else if (inlink->format == AV_PIX_FMT_YUYV422) {
213 // y <- 235, u <- 128, y <- 235, v <- 128
214 AV_WB32(dstp + g, 0xeb80eb80);
217 dstp[x] = plane == 0 ? 235 : 128;
223 } else if (inlink->format == AV_PIX_FMT_YUYV422) {
224 hi = x & 1 ? 240 : 235;
227 hi = plane == 0 ? 235 : 240;
233 valf = + 0.526 * ((int)srcpp[x] + (int)srcpn[x])
234 + 0.170 * ((int)srcp[x] + (int)prvp[x])
235 - 0.116 * ((int)srcppp[x] + (int)srcpnn[x] + (int)prvppp[x] + (int)prvpnn[x])
236 - 0.026 * ((int)srcp3p[x] + (int)srcp3n[x])
237 + 0.031 * ((int)srcp4p[x] + (int)srcp4n[x] + (int)prvp4p[x] + (int)prvp4n[x]);
239 valf = + 0.526 * ((int)srcpp[x] + (int)srcpn[x])
240 + 0.170 * ((int)prvp[x])
241 - 0.116 * ((int)prvppp[x] + (int)prvpnn[x])
242 - 0.026 * ((int)srcp3p[x] + (int)srcp3n[x])
243 + 0.031 * ((int)prvp4p[x] + (int)prvp4p[x]);
245 dstp[x] = av_clip(valf, lo, hi);
248 val = (8 * ((int)srcpp[x] + (int)srcpn[x]) + 2 * ((int)srcp[x] + (int)prvp[x])
249 - (int)(srcppp[x]) - (int)(srcpnn[x])
250 - (int)(prvppp[x]) - (int)(prvpnn[x])) >> 4;
252 val = (8 * ((int)srcpp[x] + (int)srcpn[x]) + 2 * ((int)prvp[x])
253 - (int)(prvppp[x]) - (int)(prvpnn[x])) >> 4;
255 dstp[x] = av_clip(val, lo, hi);
262 prvp += 2 * psrc_linesize;
263 prvpp += 2 * psrc_linesize;
264 prvppp += 2 * psrc_linesize;
265 prvpn += 2 * psrc_linesize;
266 prvpnn += 2 * psrc_linesize;
267 prvp4p += 2 * psrc_linesize;
268 prvp4n += 2 * psrc_linesize;
269 srcp += 2 * src_linesize;
270 srcpp += 2 * src_linesize;
271 srcppp += 2 * src_linesize;
272 srcp3p += 2 * src_linesize;
273 srcp4p += 2 * src_linesize;
274 srcpn += 2 * src_linesize;
275 srcpnn += 2 * src_linesize;
276 srcp3n += 2 * src_linesize;
277 srcp4n += 2 * src_linesize;
278 dstp += 2 * dst_linesize;
281 srcp = inpic->data[plane];
282 dstp = kerndeint->tmp_data[plane];
283 av_image_copy_plane(dstp, psrc_linesize, srcp, src_linesize, bwidth, h);
286 av_frame_free(&inpic);
287 return ff_filter_frame(outlink, outpic);
290 static const AVFilterPad kerndeint_inputs[] = {
293 .type = AVMEDIA_TYPE_VIDEO,
294 .filter_frame = filter_frame,
295 .config_props = config_props,
300 static const AVFilterPad kerndeint_outputs[] = {
303 .type = AVMEDIA_TYPE_VIDEO,
308 static const char *const shorthand[] = { "thresh", "map", "order", "sharp", "twoway", NULL };
310 AVFilter avfilter_vf_kerndeint = {
312 .description = NULL_IF_CONFIG_SMALL("Apply kernel deinterlacing to the input."),
313 .priv_size = sizeof(KerndeintContext),
315 .query_formats = query_formats,
317 .inputs = kerndeint_inputs,
318 .outputs = kerndeint_outputs,
320 .priv_class = &kerndeint_class,
321 .shorthand = shorthand,