FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_pp7.c
Date: 2026-04-24 19:58:39
Exec Total Coverage
Lines: 146 177 82.5%
Functions: 8 10 80.0%
Branches: 62 91 68.1%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
3 * Copyright (c) 2014 Arwa Arif <arwaarif1994@gmail.com>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 */
21
22 /**
23 * @file
24 * Postprocessing filter - 7
25 *
26 * Originally written by Michael Niedermayer for the MPlayer
27 * project, and ported by Arwa Arif for FFmpeg.
28 */
29
30 #include "libavutil/emms.h"
31 #include "libavutil/imgutils.h"
32 #include "libavutil/mem.h"
33 #include "libavutil/mem_internal.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/pixdesc.h"
36
37 #include "filters.h"
38 #include "qp_table.h"
39 #include "vf_pp7.h"
40 #include "video.h"
41
42 enum mode {
43 MODE_HARD,
44 MODE_SOFT,
45 MODE_MEDIUM
46 };
47
48 #define OFFSET(x) offsetof(PP7Context, x)
49 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
50 static const AVOption pp7_options[] = {
51 { "qp", "force a constant quantizer parameter", OFFSET(qp), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 64, FLAGS },
52 { "mode", "set thresholding mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = MODE_MEDIUM}, 0, 2, FLAGS, .unit = "mode" },
53 { "hard", "hard thresholding", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_HARD}, INT_MIN, INT_MAX, FLAGS, .unit = "mode" },
54 { "soft", "soft thresholding", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_SOFT}, INT_MIN, INT_MAX, FLAGS, .unit = "mode" },
55 { "medium", "medium thresholding", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_MEDIUM}, INT_MIN, INT_MAX, FLAGS, .unit = "mode" },
56 { NULL }
57 };
58
59 AVFILTER_DEFINE_CLASS(pp7);
60
61 DECLARE_ALIGNED(8, static const uint8_t, dither)[8][8] = {
62 { 0, 48, 12, 60, 3, 51, 15, 63, },
63 { 32, 16, 44, 28, 35, 19, 47, 31, },
64 { 8, 56, 4, 52, 11, 59, 7, 55, },
65 { 40, 24, 36, 20, 43, 27, 39, 23, },
66 { 2, 50, 14, 62, 1, 49, 13, 61, },
67 { 34, 18, 46, 30, 33, 17, 45, 29, },
68 { 10, 58, 6, 54, 9, 57, 5, 53, },
69 { 42, 26, 38, 22, 41, 25, 37, 21, },
70 };
71
72 #define N0 4
73 #define N1 5
74 #define N2 10
75 #define SN0 2
76 #define SN1 2.2360679775
77 #define SN2 3.16227766017
78 #define N (1 << 16)
79
80 static const int factor[16] = {
81 N / (N0 * N0), N / (N0 * N1), N / (N0 * N0), N / (N0 * N2),
82 N / (N1 * N0), N / (N1 * N1), N / (N1 * N0), N / (N1 * N2),
83 N / (N0 * N0), N / (N0 * N1), N / (N0 * N0), N / (N0 * N2),
84 N / (N2 * N0), N / (N2 * N1), N / (N2 * N0), N / (N2 * N2),
85 };
86
87 1 static void init_thres2(PP7Context *p)
88 {
89 int qp, i;
90 1 int bias = 0; //FIXME
91
92
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 100 for (qp = 0; qp < 99; qp++) {
93
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 1683 for (i = 0; i < 16; i++) {
94
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 1584 p->thres2[qp][i] = ((i&1) ? SN2 : SN0) * ((i&4) ? SN2 : SN0) * FFMAX(1, qp) * (1<<2) - 1 - bias;
95 }
96 }
97 1 }
98
99 235008 static inline void dctA_c(int16_t *dst, uint8_t *src, int stride)
100 {
101 int i;
102
103
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 1175040 for (i = 0; i < 4; i++) {
104 940032 int s0 = src[0 * stride] + src[6 * stride];
105 940032 int s1 = src[1 * stride] + src[5 * stride];
106 940032 int s2 = src[2 * stride] + src[4 * stride];
107 940032 int s3 = src[3 * stride];
108 940032 int s = s3 + s3;
109 940032 s3 = s - s0;
110 940032 s0 = s + s0;
111 940032 s = s2 + s1;
112 940032 s2 = s2 - s1;
113 940032 dst[0] = s0 + s;
114 940032 dst[2] = s0 - s;
115 940032 dst[1] = 2 * s3 + s2;
116 940032 dst[3] = s3 - 2 * s2;
117 940032 src++;
118 940032 dst += 4;
119 }
120 235008 }
121
122 912384 static void dctB_c(int16_t *dst, int16_t *src)
123 {
124 int i;
125
126
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 4561920 for (i = 0; i < 4; i++) {
127 3649536 int s0 = src[0 * 4] + src[6 * 4];
128 3649536 int s1 = src[1 * 4] + src[5 * 4];
129 3649536 int s2 = src[2 * 4] + src[4 * 4];
130 3649536 int s3 = src[3 * 4];
131 3649536 int s = s3 + s3;
132 3649536 s3 = s - s0;
133 3649536 s0 = s + s0;
134 3649536 s = s2 + s1;
135 3649536 s2 = s2 - s1;
136 3649536 dst[0 * 4] = s0 + s;
137 3649536 dst[2 * 4] = s0 - s;
138 3649536 dst[1 * 4] = 2 * s3 + s2;
139 3649536 dst[3 * 4] = s3 - 2 * s2;
140 3649536 src++;
141 3649536 dst++;
142 }
143 912384 }
144
145 ✗ static int hardthresh_c(PP7Context *p, int16_t *src, int qp)
146 {
147 int i;
148 int a;
149
150 ✗ a = src[0] * factor[0];
151 ✗ for (i = 1; i < 16; i++) {
152 ✗ unsigned int threshold1 = p->thres2[qp][i];
153 ✗ unsigned int threshold2 = threshold1 << 1;
154 ✗ int level = src[i];
155 ✗ if (((unsigned)(level + threshold1)) > threshold2)
156 ✗ a += level * factor[i];
157 }
158 ✗ return (a + (1 << 11)) >> 12;
159 }
160
161 912384 static int mediumthresh_c(PP7Context *p, int16_t *src, int qp)
162 {
163 int i;
164 int a;
165
166 912384 a = src[0] * factor[0];
167
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 14598144 for (i = 1; i < 16; i++) {
168 13685760 unsigned int threshold1 = p->thres2[qp][i];
169 13685760 unsigned int threshold2 = threshold1 << 1;
170 13685760 int level = src[i];
171
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 13685760 if (((unsigned)(level + threshold1)) > threshold2) {
172
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 6743694 if (((unsigned)(level + 2 * threshold1)) > 2 * threshold2)
173 4707989 a += level * factor[i];
174 else {
175
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 2035705 if (level > 0)
176 1016686 a += 2 * (level - (int)threshold1) * factor[i];
177 else
178 1019019 a += 2 * (level + (int)threshold1) * factor[i];
179 }
180 }
181 }
182 912384 return (a + (1 << 11)) >> 12;
183 }
184
185 ✗ static int softthresh_c(PP7Context *p, int16_t *src, int qp)
186 {
187 int i;
188 int a;
189
190 ✗ a = src[0] * factor[0];
191 ✗ for (i = 1; i < 16; i++) {
192 ✗ unsigned int threshold1 = p->thres2[qp][i];
193 ✗ unsigned int threshold2 = threshold1 << 1;
194 ✗ int level = src[i];
195 ✗ if (((unsigned)(level + threshold1)) > threshold2) {
196 ✗ if (level > 0)
197 ✗ a += (level - (int)threshold1) * factor[i];
198 else
199 ✗ a += (level + (int)threshold1) * factor[i];
200 }
201 }
202 ✗ return (a + (1 << 11)) >> 12;
203 }
204
205 18 static void filter(PP7Context *p, uint8_t *dst, uint8_t *src,
206 int dst_stride, int src_stride,
207 int width, int height,
208 uint8_t *qp_store, int qp_stride, int is_luma)
209 {
210 int x, y;
211
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 18 const int stride = is_luma ? p->temp_stride : ((width + 16 + 15) & (~15));
212 18 uint8_t *p_src = p->src + 8 * stride;
213 18 int16_t *block = (int16_t *)p->src;
214 18 int16_t *temp = (int16_t *)(p->src + 32);
215
216
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 18 if (!src || !dst) return;
217
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 3474 for (y = 0; y < height; y++) {
218 3456 int index = 8 + 8 * stride + y * stride;
219 3456 memcpy(p_src + index, src + y * src_stride, width);
220
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 31104 for (x = 0; x < 8; x++) {
221 27648 p_src[index - x - 1]= p_src[index + x ];
222 27648 p_src[index + width + x ]= p_src[index + width - x - 1];
223 }
224 }
225
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 162 for (y = 0; y < 8; y++) {
226 144 memcpy(p_src + ( 7 - y ) * stride, p_src + ( y + 8 ) * stride, stride);
227 144 memcpy(p_src + (height + 8 + y) * stride, p_src + (height - y + 7) * stride, stride);
228 }
229 //FIXME (try edge emu)
230
231
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232
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233 6912 const int index = x + y * stride + (8 - 3) * (1 + stride) + 8; //FIXME silly offset
234 6912 uint8_t *src = p_src + index;
235 6912 int16_t *tp = temp + 4 * x;
236
237 6912 dctA_c(tp + 4 * 8, src, stride);
238 }
239
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240 114048 const int qps = 3 + is_luma;
241 int qp;
242
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 114048 int end = FFMIN(x + 8, width);
243
244
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 114048 if (p->qp)
245 ✗ qp = p->qp;
246 else {
247
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 114048 qp = qp_store[ (FFMIN(x, width - 1) >> qps) + (FFMIN(y, height - 1) >> qps) * qp_stride];
248 114048 qp = ff_norm_qscale(qp, p->qscale_type);
249 }
250
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251 912384 const int index = x + y * stride + (8 - 3) * (1 + stride) + 8; //FIXME silly offset
252 912384 uint8_t *src = p_src + index;
253 912384 int16_t *tp = temp + 4 * x;
254 int v;
255
256
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 912384 if ((x & 3) == 0)
257 228096 dctA_c(tp + 4 * 8, src, stride);
258
259 912384 p->dctB(block, tp);
260
261 912384 v = p->requantize(p, block, qp);
262 912384 v = (v + dither[y & 7][x & 7]) >> 6;
263
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 912384 if ((unsigned)v > 255)
264 9 v = (-v) >> 31;
265 912384 dst[x + y * dst_stride] = v;
266 }
267 }
268 }
269 }
270
271 static const enum AVPixelFormat pix_fmts[] = {
272 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
273 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
274 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
275 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
276 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ440P,
277 AV_PIX_FMT_GBRP,
278 AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE
279 };
280
281 1 static int config_input(AVFilterLink *inlink)
282 {
283 1 AVFilterContext *ctx = inlink->dst;
284 1 PP7Context *pp7 = ctx->priv;
285 1 const int h = FFALIGN(inlink->h + 16, 16);
286 1 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
287
288 1 pp7->hsub = desc->log2_chroma_w;
289 1 pp7->vsub = desc->log2_chroma_h;
290
291 1 pp7->temp_stride = FFALIGN(inlink->w + 16, 16);
292 1 pp7->src = av_malloc_array(pp7->temp_stride, (h + 8) * sizeof(uint8_t));
293
294
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 1 if (!pp7->src)
295 ✗ return AVERROR(ENOMEM);
296
297 1 init_thres2(pp7);
298
299
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 1 switch (pp7->mode) {
300 ✗ case 0: pp7->requantize = hardthresh_c; break;
301 ✗ case 1: pp7->requantize = softthresh_c; break;
302 1 default:
303 1 case 2: pp7->requantize = mediumthresh_c; break;
304 }
305
306 1 pp7->dctB = dctB_c;
307
308 #if ARCH_X86 && HAVE_X86ASM
309 1 ff_pp7_init_x86(pp7);
310 #endif
311
312 1 return 0;
313 }
314
315 6 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
316 {
317 6 AVFilterContext *ctx = inlink->dst;
318 6 PP7Context *pp7 = ctx->priv;
319 6 AVFilterLink *outlink = ctx->outputs[0];
320 6 AVFrame *out = in;
321
322 6 int qp_stride = 0;
323 6 int8_t *qp_table = NULL;
324
325
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 6 if (!pp7->qp) {
326 6 int ret = ff_qp_table_extract(in, &qp_table, &qp_stride, NULL, &pp7->qscale_type);
327
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 6 if (ret < 0) {
328 ✗ av_frame_free(&in);
329 ✗ return ret;
330 }
331 }
332
333
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 6 if (!ctx->is_disabled) {
334 6 const int cw = AV_CEIL_RSHIFT(inlink->w, pp7->hsub);
335 6 const int ch = AV_CEIL_RSHIFT(inlink->h, pp7->vsub);
336
337 /* get a new frame if in-place is not possible or if the dimensions
338 * are not multiple of 8 */
339
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 6 if (!av_frame_is_writable(in) || (inlink->w & 7) || (inlink->h & 7)) {
340 3 const int aligned_w = FFALIGN(inlink->w, 8);
341 3 const int aligned_h = FFALIGN(inlink->h, 8);
342
343 3 out = ff_get_video_buffer(outlink, aligned_w, aligned_h);
344
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 3 if (!out) {
345 ✗ av_frame_free(&in);
346 ✗ av_freep(&qp_table);
347 ✗ return AVERROR(ENOMEM);
348 }
349 3 av_frame_copy_props(out, in);
350 3 out->width = in->width;
351 3 out->height = in->height;
352 }
353
354
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 6 if (qp_table || pp7->qp) {
355
356 6 filter(pp7, out->data[0], in->data[0], out->linesize[0], in->linesize[0],
357 inlink->w, inlink->h, qp_table, qp_stride, 1);
358 6 filter(pp7, out->data[1], in->data[1], out->linesize[1], in->linesize[1],
359 cw, ch, qp_table, qp_stride, 0);
360 6 filter(pp7, out->data[2], in->data[2], out->linesize[2], in->linesize[2],
361 cw, ch, qp_table, qp_stride, 0);
362 6 emms_c();
363 }
364 }
365
366
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 6 if (in != out) {
367
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 3 if (in->data[3])
368 ✗ av_image_copy_plane(out->data[3], out->linesize[3],
369 ✗ in ->data[3], in ->linesize[3],
370 inlink->w, inlink->h);
371 3 av_frame_free(&in);
372 }
373 6 av_freep(&qp_table);
374 6 return ff_filter_frame(outlink, out);
375 }
376
377 2 static av_cold void uninit(AVFilterContext *ctx)
378 {
379 2 PP7Context *pp7 = ctx->priv;
380 2 av_freep(&pp7->src);
381 2 }
382
383 static const AVFilterPad pp7_inputs[] = {
384 {
385 .name = "default",
386 .type = AVMEDIA_TYPE_VIDEO,
387 .config_props = config_input,
388 .filter_frame = filter_frame,
389 },
390 };
391
392 const FFFilter ff_vf_pp7 = {
393 .p.name = "pp7",
394 .p.description = NULL_IF_CONFIG_SMALL("Apply Postprocessing 7 filter."),
395 .p.priv_class = &pp7_class,
396 .p.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
397 .priv_size = sizeof(PP7Context),
398 .uninit = uninit,
399 FILTER_INPUTS(pp7_inputs),
400 FILTER_OUTPUTS(ff_video_default_filterpad),
401 FILTER_PIXFMTS_ARRAY(pix_fmts),
402 };
403