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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavfilter / vf_super2xsai.c
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2ba45a60
DM		 1/*
2 * Copyright (c) 2010 Niel van der Westhuizen <nielkie@gmail.com>
3 * Copyright (c) 2002 A'rpi
4 * Copyright (c) 1997-2001 ZSNES Team ( zsknight@zsnes.com / _demo_@zsnes.com )
5 *
6 * This file is part of FFmpeg.
7 *
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.
12 *
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.
17 *
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.
21 */
22
23/**
24 * @file
25 * Super 2xSaI video filter
26 * Ported from MPlayer libmpcodecs/vf_2xsai.c.
27 */
28
29#include "libavutil/pixdesc.h"
30#include "libavutil/intreadwrite.h"
31#include "avfilter.h"
32#include "formats.h"
33#include "internal.h"
34#include "video.h"
35
36typedef struct {
37 /* masks used for two pixels interpolation */
38 uint32_t hi_pixel_mask;
39 uint32_t lo_pixel_mask;
40
41 /* masks used for four pixels interpolation */
42 uint32_t q_hi_pixel_mask;
43 uint32_t q_lo_pixel_mask;
44
45 int bpp; ///< bytes per pixel, pixel stride for each (packed) pixel
46 int is_be;
47} Super2xSaIContext;
48
49#define GET_RESULT(A, B, C, D) ((A != C || A != D) - (B != C || B != D))
50
51#define INTERPOLATE(A, B) (((A & hi_pixel_mask) >> 1) + ((B & hi_pixel_mask) >> 1) + (A & B & lo_pixel_mask))
52
53#define Q_INTERPOLATE(A, B, C, D) ((A & q_hi_pixel_mask) >> 2) + ((B & q_hi_pixel_mask) >> 2) + ((C & q_hi_pixel_mask) >> 2) + ((D & q_hi_pixel_mask) >> 2) \
54 + ((((A & q_lo_pixel_mask) + (B & q_lo_pixel_mask) + (C & q_lo_pixel_mask) + (D & q_lo_pixel_mask)) >> 2) & q_lo_pixel_mask)
55
56static void super2xsai(AVFilterContext *ctx,
57 uint8_t *src, int src_linesize,
58 uint8_t *dst, int dst_linesize,
59 int width, int height)
60{
61 Super2xSaIContext *sai = ctx->priv;
62 unsigned int x, y;
63 uint32_t color[4][4];
64 unsigned char *src_line[4];
65 const int bpp = sai->bpp;
66 const uint32_t hi_pixel_mask = sai->hi_pixel_mask;
67 const uint32_t lo_pixel_mask = sai->lo_pixel_mask;
68 const uint32_t q_hi_pixel_mask = sai->q_hi_pixel_mask;
69 const uint32_t q_lo_pixel_mask = sai->q_lo_pixel_mask;
70
71 /* Point to the first 4 lines, first line is duplicated */
72 src_line[0] = src;
73 src_line[1] = src;
74 src_line[2] = src + src_linesize*FFMIN(1, height-1);
75 src_line[3] = src + src_linesize*FFMIN(2, height-1);
76
77#define READ_COLOR4(dst, src_line, off) dst = *((const uint32_t *)src_line + off)
78#define READ_COLOR3(dst, src_line, off) dst = AV_RL24 (src_line + 3*off)
79#define READ_COLOR2(dst, src_line, off) dst = sai->is_be ? AV_RB16(src_line + 2 * off) : AV_RL16(src_line + 2 * off)
80
81 for (y = 0; y < height; y++) {
82 uint8_t *dst_line[2];
83
84 dst_line[0] = dst + dst_linesize*2*y;
85 dst_line[1] = dst + dst_linesize*(2*y+1);
86
87 switch (bpp) {
88 case 4:
89 READ_COLOR4(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR4(color[0][2], src_line[0], 1); READ_COLOR4(color[0][3], src_line[0], 2);
90 READ_COLOR4(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR4(color[1][2], src_line[1], 1); READ_COLOR4(color[1][3], src_line[1], 2);
91 READ_COLOR4(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR4(color[2][2], src_line[2], 1); READ_COLOR4(color[2][3], src_line[2], 2);
92 READ_COLOR4(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR4(color[3][2], src_line[3], 1); READ_COLOR4(color[3][3], src_line[3], 2);
93 break;
94 case 3:
95 READ_COLOR3(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR3(color[0][2], src_line[0], 1); READ_COLOR3(color[0][3], src_line[0], 2);
96 READ_COLOR3(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR3(color[1][2], src_line[1], 1); READ_COLOR3(color[1][3], src_line[1], 2);
97 READ_COLOR3(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR3(color[2][2], src_line[2], 1); READ_COLOR3(color[2][3], src_line[2], 2);
98 READ_COLOR3(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR3(color[3][2], src_line[3], 1); READ_COLOR3(color[3][3], src_line[3], 2);
99 break;
100 default:
101 READ_COLOR2(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR2(color[0][2], src_line[0], 1); READ_COLOR2(color[0][3], src_line[0], 2);
102 READ_COLOR2(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR2(color[1][2], src_line[1], 1); READ_COLOR2(color[1][3], src_line[1], 2);
103 READ_COLOR2(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR2(color[2][2], src_line[2], 1); READ_COLOR2(color[2][3], src_line[2], 2);
104 READ_COLOR2(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR2(color[3][2], src_line[3], 1); READ_COLOR2(color[3][3], src_line[3], 2);
105 }
106
107 for (x = 0; x < width; x++) {
108 uint32_t product1a, product1b, product2a, product2b;
109
110//--------------------------------------- B0 B1 B2 B3 0 1 2 3
111// 4 5* 6 S2 -> 4 5* 6 7
112// 1 2 3 S1 8 9 10 11
113// A0 A1 A2 A3 12 13 14 15
114//--------------------------------------
115 if (color[2][1] == color[1][2] && color[1][1] != color[2][2]) {
116 product2b = color[2][1];
117 product1b = product2b;
118 } else if (color[1][1] == color[2][2] && color[2][1] != color[1][2]) {
119 product2b = color[1][1];
120 product1b = product2b;
121 } else if (color[1][1] == color[2][2] && color[2][1] == color[1][2]) {
122 int r = 0;
123
124 r += GET_RESULT(color[1][2], color[1][1], color[1][0], color[3][1]);
125 r += GET_RESULT(color[1][2], color[1][1], color[2][0], color[0][1]);
126 r += GET_RESULT(color[1][2], color[1][1], color[3][2], color[2][3]);
127 r += GET_RESULT(color[1][2], color[1][1], color[0][2], color[1][3]);
128
129 if (r > 0)
130 product1b = color[1][2];
131 else if (r < 0)
132 product1b = color[1][1];
133 else
134 product1b = INTERPOLATE(color[1][1], color[1][2]);
135
136 product2b = product1b;
137 } else {
138 if (color[1][2] == color[2][2] && color[2][2] == color[3][1] && color[2][1] != color[3][2] && color[2][2] != color[3][0])
139 product2b = Q_INTERPOLATE(color[2][2], color[2][2], color[2][2], color[2][1]);
140 else if (color[1][1] == color[2][1] && color[2][1] == color[3][2] && color[3][1] != color[2][2] && color[2][1] != color[3][3])
141 product2b = Q_INTERPOLATE(color[2][1], color[2][1], color[2][1], color[2][2]);
142 else
143 product2b = INTERPOLATE(color[2][1], color[2][2]);
144
145 if (color[1][2] == color[2][2] && color[1][2] == color[0][1] && color[1][1] != color[0][2] && color[1][2] != color[0][0])
146 product1b = Q_INTERPOLATE(color[1][2], color[1][2], color[1][2], color[1][1]);
147 else if (color[1][1] == color[2][1] && color[1][1] == color[0][2] && color[0][1] != color[1][2] && color[1][1] != color[0][3])
148 product1b = Q_INTERPOLATE(color[1][2], color[1][1], color[1][1], color[1][1]);
149 else
150 product1b = INTERPOLATE(color[1][1], color[1][2]);
151 }
152
153 if (color[1][1] == color[2][2] && color[2][1] != color[1][2] && color[1][0] == color[1][1] && color[1][1] != color[3][2])
154 product2a = INTERPOLATE(color[2][1], color[1][1]);
155 else if (color[1][1] == color[2][0] && color[1][2] == color[1][1] && color[1][0] != color[2][1] && color[1][1] != color[3][0])
156 product2a = INTERPOLATE(color[2][1], color[1][1]);
157 else
158 product2a = color[2][1];
159
160 if (color[2][1] == color[1][2] && color[1][1] != color[2][2] && color[2][0] == color[2][1] && color[2][1] != color[0][2])
161 product1a = INTERPOLATE(color[2][1], color[1][1]);
162 else if (color[1][0] == color[2][1] && color[2][2] == color[2][1] && color[2][0] != color[1][1] && color[2][1] != color[0][0])
163 product1a = INTERPOLATE(color[2][1], color[1][1]);
164 else
165 product1a = color[1][1];
166
167 /* Set the calculated pixels */
168 switch (bpp) {
169 case 4:
170 AV_WN32A(dst_line[0] + x * 8, product1a);
171 AV_WN32A(dst_line[0] + x * 8 + 4, product1b);
172 AV_WN32A(dst_line[1] + x * 8, product2a);
173 AV_WN32A(dst_line[1] + x * 8 + 4, product2b);
174 break;
175 case 3:
176 AV_WL24(dst_line[0] + x * 6, product1a);
177 AV_WL24(dst_line[0] + x * 6 + 3, product1b);
178 AV_WL24(dst_line[1] + x * 6, product2a);
179 AV_WL24(dst_line[1] + x * 6 + 3, product2b);
180 break;
181 default: // bpp = 2
182 if (sai->is_be) {
183 AV_WB32(dst_line[0] + x * 4, product1a | (product1b << 16));
184 AV_WB32(dst_line[1] + x * 4, product2a | (product2b << 16));
185 } else {
186 AV_WL32(dst_line[0] + x * 4, product1a | (product1b << 16));
187 AV_WL32(dst_line[1] + x * 4, product2a | (product2b << 16));
188 }
189 }
190
191 /* Move color matrix forward */
192 color[0][0] = color[0][1]; color[0][1] = color[0][2]; color[0][2] = color[0][3];
193 color[1][0] = color[1][1]; color[1][1] = color[1][2]; color[1][2] = color[1][3];
194 color[2][0] = color[2][1]; color[2][1] = color[2][2]; color[2][2] = color[2][3];
195 color[3][0] = color[3][1]; color[3][1] = color[3][2]; color[3][2] = color[3][3];
196
197 if (x < width - 3) {
198 x += 3;
199 switch (bpp) {
200 case 4:
201 READ_COLOR4(color[0][3], src_line[0], x);
202 READ_COLOR4(color[1][3], src_line[1], x);
203 READ_COLOR4(color[2][3], src_line[2], x);
204 READ_COLOR4(color[3][3], src_line[3], x);
205 break;
206 case 3:
207 READ_COLOR3(color[0][3], src_line[0], x);
208 READ_COLOR3(color[1][3], src_line[1], x);
209 READ_COLOR3(color[2][3], src_line[2], x);
210 READ_COLOR3(color[3][3], src_line[3], x);
211 break;
212 default: /* case 2 */
213 READ_COLOR2(color[0][3], src_line[0], x);
214 READ_COLOR2(color[1][3], src_line[1], x);
215 READ_COLOR2(color[2][3], src_line[2], x);
216 READ_COLOR2(color[3][3], src_line[3], x);
217 }
218 x -= 3;
219 }
220 }
221
222 /* We're done with one line, so we shift the source lines up */
223 src_line[0] = src_line[1];
224 src_line[1] = src_line[2];
225 src_line[2] = src_line[3];
226
227 /* Read next line */
228 src_line[3] = src_line[2];
229 if (y < height - 3)
230 src_line[3] += src_linesize;
231 } // y loop
232}
233
234static int query_formats(AVFilterContext *ctx)
235{
236 static const enum AVPixelFormat pix_fmts[] = {
237 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
238 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
239 AV_PIX_FMT_RGB565BE, AV_PIX_FMT_BGR565BE, AV_PIX_FMT_RGB555BE, AV_PIX_FMT_BGR555BE,
240 AV_PIX_FMT_RGB565LE, AV_PIX_FMT_BGR565LE, AV_PIX_FMT_RGB555LE, AV_PIX_FMT_BGR555LE,
241 AV_PIX_FMT_NONE
242 };
243
244 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
245 return 0;
246}
247
248static int config_input(AVFilterLink *inlink)
249{
250 Super2xSaIContext *sai = inlink->dst->priv;
251
252 sai->hi_pixel_mask = 0xFEFEFEFE;
253 sai->lo_pixel_mask = 0x01010101;
254 sai->q_hi_pixel_mask = 0xFCFCFCFC;
255 sai->q_lo_pixel_mask = 0x03030303;
256 sai->bpp = 4;
257
258 switch (inlink->format) {
259 case AV_PIX_FMT_RGB24:
260 case AV_PIX_FMT_BGR24:
261 sai->bpp = 3;
262 break;
263
264 case AV_PIX_FMT_RGB565BE:
265 case AV_PIX_FMT_BGR565BE:
266 sai->is_be = 1;
267 case AV_PIX_FMT_RGB565LE:
268 case AV_PIX_FMT_BGR565LE:
269 sai->hi_pixel_mask = 0xF7DEF7DE;
270 sai->lo_pixel_mask = 0x08210821;
271 sai->q_hi_pixel_mask = 0xE79CE79C;
272 sai->q_lo_pixel_mask = 0x18631863;
273 sai->bpp = 2;
274 break;
275
276 case AV_PIX_FMT_BGR555BE:
277 case AV_PIX_FMT_RGB555BE:
278 sai->is_be = 1;
279 case AV_PIX_FMT_BGR555LE:
280 case AV_PIX_FMT_RGB555LE:
281 sai->hi_pixel_mask = 0x7BDE7BDE;
282 sai->lo_pixel_mask = 0x04210421;
283 sai->q_hi_pixel_mask = 0x739C739C;
284 sai->q_lo_pixel_mask = 0x0C630C63;
285 sai->bpp = 2;
286 break;
287 }
288
289 return 0;
290}
291
292static int config_output(AVFilterLink *outlink)
293{
294 AVFilterLink *inlink = outlink->src->inputs[0];
295
296 outlink->w = inlink->w*2;
297 outlink->h = inlink->h*2;
298
299 av_log(inlink->dst, AV_LOG_VERBOSE, "fmt:%s size:%dx%d -> size:%dx%d\n",
300 av_get_pix_fmt_name(inlink->format),
301 inlink->w, inlink->h, outlink->w, outlink->h);
302
303 return 0;
304}
305
306static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
307{
308 AVFilterLink *outlink = inlink->dst->outputs[0];
309 AVFrame *outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
310 if (!outpicref) {
311 av_frame_free(&inpicref);
312 return AVERROR(ENOMEM);
313 }
314 av_frame_copy_props(outpicref, inpicref);
315 outpicref->width = outlink->w;
316 outpicref->height = outlink->h;
317
318 super2xsai(inlink->dst, inpicref->data[0], inpicref->linesize[0],
319 outpicref->data[0], outpicref->linesize[0],
320 inlink->w, inlink->h);
321
322 av_frame_free(&inpicref);
323 return ff_filter_frame(outlink, outpicref);
324}
325
326static const AVFilterPad super2xsai_inputs[] = {
327 {
328 .name = "default",
329 .type = AVMEDIA_TYPE_VIDEO,
330 .config_props = config_input,
331 .filter_frame = filter_frame,
332 },
333 { NULL }
334};
335
336static const AVFilterPad super2xsai_outputs[] = {
337 {
338 .name = "default",
339 .type = AVMEDIA_TYPE_VIDEO,
340 .config_props = config_output,
341 },
342 { NULL }
343};
344
345AVFilter ff_vf_super2xsai = {
346 .name = "super2xsai",
347 .description = NULL_IF_CONFIG_SMALL("Scale the input by 2x using the Super2xSaI pixel art algorithm."),
348 .priv_size = sizeof(Super2xSaIContext),
349 .query_formats = query_formats,
350 .inputs = super2xsai_inputs,
351 .outputs = super2xsai_outputs,
352};
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