FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_codecview.c
Date: 2023-12-04 05:51:44
Exec Total Coverage
Lines: 94 148 63.5%
Functions: 5 6 83.3%
Branches: 57 140 40.7%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
3 * Copyright (c) 2014 Clément Bœsch <u pkh me>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (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 GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * Codec debug viewer filter.
25 *
26 * All the MV drawing code from Michael Niedermayer is extracted from
27 * libavcodec/mpegvideo.c.
28 *
29 * TODO: segmentation
30 */
31
32 #include "libavutil/imgutils.h"
33 #include "libavutil/motion_vector.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/video_enc_params.h"
36 #include "avfilter.h"
37 #include "qp_table.h"
38 #include "internal.h"
39 #include "video.h"
40
41 #define MV_P_FOR (1<<0)
42 #define MV_B_FOR (1<<1)
43 #define MV_B_BACK (1<<2)
44 #define MV_TYPE_FOR (1<<0)
45 #define MV_TYPE_BACK (1<<1)
46 #define FRAME_TYPE_I (1<<0)
47 #define FRAME_TYPE_P (1<<1)
48 #define FRAME_TYPE_B (1<<2)
49
50 typedef struct CodecViewContext {
51 const AVClass *class;
52 unsigned mv;
53 unsigned frame_type;
54 unsigned mv_type;
55 int hsub, vsub;
56 int qp;
57 int block;
58 } CodecViewContext;
59
60 #define OFFSET(x) offsetof(CodecViewContext, x)
61 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
62 #define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, unit }
63
64 static const AVOption codecview_options[] = {
65 { "mv", "set motion vectors to visualize", OFFSET(mv), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv" },
66 CONST("pf", "forward predicted MVs of P-frames", MV_P_FOR, "mv"),
67 CONST("bf", "forward predicted MVs of B-frames", MV_B_FOR, "mv"),
68 CONST("bb", "backward predicted MVs of B-frames", MV_B_BACK, "mv"),
69 { "qp", NULL, OFFSET(qp), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
70 { "mv_type", "set motion vectors type", OFFSET(mv_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv_type" },
71 { "mvt", "set motion vectors type", OFFSET(mv_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv_type" },
72 CONST("fp", "forward predicted MVs", MV_TYPE_FOR, "mv_type"),
73 CONST("bp", "backward predicted MVs", MV_TYPE_BACK, "mv_type"),
74 { "frame_type", "set frame types to visualize motion vectors of", OFFSET(frame_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "frame_type" },
75 { "ft", "set frame types to visualize motion vectors of", OFFSET(frame_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "frame_type" },
76 CONST("if", "I-frames", FRAME_TYPE_I, "frame_type"),
77 CONST("pf", "P-frames", FRAME_TYPE_P, "frame_type"),
78 CONST("bf", "B-frames", FRAME_TYPE_B, "frame_type"),
79 { "block", "set block partitioning structure to visualize", OFFSET(block), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
80 { NULL }
81 };
82
83 AVFILTER_DEFINE_CLASS(codecview);
84
85 17331 static int clip_line(int *sx, int *sy, int *ex, int *ey, int maxx)
86 {
87
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 17331 if(*sx > *ex)
88 5175 return clip_line(ex, ey, sx, sy, maxx);
89
90
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 12156 if (*sx < 0) {
91
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 9 if (*ex < 0)
92 ✗ return 1;
93 9 *sy = *ey + (*sy - *ey) * (int64_t)*ex / (*ex - *sx);
94 9 *sx = 0;
95 }
96
97
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 12156 if (*ex > maxx) {
98 ✗ if (*sx > maxx)
99 ✗ return 1;
100 ✗ *ey = *sy + (*ey - *sy) * (int64_t)(maxx - *sx) / (*ex - *sx);
101 ✗ *ex = maxx;
102 }
103 12156 return 0;
104 }
105
106 /**
107 * Draw a line from (ex, ey) -> (sx, sy).
108 * @param w width of the image
109 * @param h height of the image
110 * @param stride stride/linesize of the image
111 * @param color color of the arrow
112 */
113 6078 static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey,
114 int w, int h, ptrdiff_t stride, int color)
115 {
116 int x, y, fr, f;
117
118
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 6078 if (clip_line(&sx, &sy, &ex, &ey, w - 1))
119 ✗ return;
120
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 6078 if (clip_line(&sy, &sx, &ey, &ex, h - 1))
121 ✗ return;
122
123 6078 sx = av_clip(sx, 0, w - 1);
124 6078 sy = av_clip(sy, 0, h - 1);
125 6078 ex = av_clip(ex, 0, w - 1);
126 6078 ey = av_clip(ey, 0, h - 1);
127
128 6078 buf[sy * stride + sx] += color;
129
130
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 6078 if (FFABS(ex - sx) > FFABS(ey - sy)) {
131
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 1182 if (sx > ex) {
132 887 FFSWAP(int, sx, ex);
133 887 FFSWAP(int, sy, ey);
134 }
135 1182 buf += sx + sy * stride;
136 1182 ex -= sx;
137 1182 f = ((ey - sy) * (1 << 16)) / ex;
138
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 16943 for (x = 0; x <= ex; x++) {
139 15761 y = (x * f) >> 16;
140 15761 fr = (x * f) & 0xFFFF;
141 15761 buf[ y * stride + x] += (color * (0x10000 - fr)) >> 16;
142
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 15761 if(fr) buf[(y + 1) * stride + x] += (color * fr ) >> 16;
143 }
144 } else {
145
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 4896 if (sy > ey) {
146 2168 FFSWAP(int, sx, ex);
147 2168 FFSWAP(int, sy, ey);
148 }
149 4896 buf += sx + sy * stride;
150 4896 ey -= sy;
151
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 4896 if (ey)
152 2647 f = ((ex - sx) * (1 << 16)) / ey;
153 else
154 2249 f = 0;
155
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 19576 for(y= 0; y <= ey; y++){
156 14680 x = (y*f) >> 16;
157 14680 fr = (y*f) & 0xFFFF;
158 14680 buf[y * stride + x ] += (color * (0x10000 - fr)) >> 16;
159
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 14680 if(fr) buf[y * stride + x + 1] += (color * fr ) >> 16;
160 }
161 }
162 }
163
164 /**
165 * Draw an arrow from (ex, ey) -> (sx, sy).
166 * @param w width of the image
167 * @param h height of the image
168 * @param stride stride/linesize of the image
169 * @param color color of the arrow
170 */
171 3560 static void draw_arrow(uint8_t *buf, int sx, int sy, int ex,
172 int ey, int w, int h, ptrdiff_t stride, int color, int tail, int direction)
173 {
174 int dx,dy;
175
176
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 3560 if (direction) {
177 1164 FFSWAP(int, sx, ex);
178 1164 FFSWAP(int, sy, ey);
179 }
180
181 3560 sx = av_clip(sx, -100, w + 100);
182 3560 sy = av_clip(sy, -100, h + 100);
183 3560 ex = av_clip(ex, -100, w + 100);
184 3560 ey = av_clip(ey, -100, h + 100);
185
186 3560 dx = ex - sx;
187 3560 dy = ey - sy;
188
189
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 3560 if (dx * dx + dy * dy > 3 * 3) {
190 1259 int rx = dx + dy;
191 1259 int ry = -dx + dy;
192 1259 int length = sqrt((rx * rx + ry * ry) << 8);
193
194 // FIXME subpixel accuracy
195
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 1259 rx = ROUNDED_DIV(rx * (3 << 4), length);
196
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 1259 ry = ROUNDED_DIV(ry * (3 << 4), length);
197
198
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 1259 if (tail) {
199 ✗ rx = -rx;
200 ✗ ry = -ry;
201 }
202
203 1259 draw_line(buf, sx, sy, sx + rx, sy + ry, w, h, stride, color);
204 1259 draw_line(buf, sx, sy, sx - ry, sy + rx, w, h, stride, color);
205 }
206 3560 draw_line(buf, sx, sy, ex, ey, w, h, stride, color);
207 3560 }
208
209 ✗ static void draw_block_rectangle(uint8_t *buf, int sx, int sy, int w, int h, ptrdiff_t stride, int color)
210 {
211 ✗ for (int x = sx; x < sx + w; x++)
212 ✗ buf[x] = color;
213
214 ✗ for (int y = sy; y < sy + h; y++) {
215 ✗ buf[sx] = color;
216 ✗ buf[sx + w - 1] = color;
217 ✗ buf += stride;
218 }
219
220 ✗ for (int x = sx; x < sx + w; x++)
221 ✗ buf[x] = color;
222 ✗ }
223
224 67 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
225 {
226 67 AVFilterContext *ctx = inlink->dst;
227 67 CodecViewContext *s = ctx->priv;
228 67 AVFilterLink *outlink = ctx->outputs[0];
229
230
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 67 if (s->qp) {
231 enum AVVideoEncParamsType qp_type;
232 int qstride, ret;
233 int8_t *qp_table;
234
235 ✗ ret = ff_qp_table_extract(frame, &qp_table, &qstride, NULL, &qp_type);
236 ✗ if (ret < 0) {
237 ✗ av_frame_free(&frame);
238 ✗ return ret;
239 }
240
241 ✗ if (qp_table) {
242 int x, y;
243 ✗ const int w = AV_CEIL_RSHIFT(frame->width, s->hsub);
244 ✗ const int h = AV_CEIL_RSHIFT(frame->height, s->vsub);
245 ✗ uint8_t *pu = frame->data[1];
246 ✗ uint8_t *pv = frame->data[2];
247 ✗ const ptrdiff_t lzu = frame->linesize[1];
248 ✗ const ptrdiff_t lzv = frame->linesize[2];
249
250 ✗ for (y = 0; y < h; y++) {
251 ✗ for (x = 0; x < w; x++) {
252 ✗ const int qp = ff_norm_qscale(qp_table[(y >> 3) * qstride + (x >> 3)], qp_type) * 128/31;
253 ✗ pu[x] = pv[x] = qp;
254 }
255 ✗ pu += lzu;
256 ✗ pv += lzv;
257 }
258 }
259 ✗ av_freep(&qp_table);
260 }
261
262
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 67 if (s->block) {
263 ✗ AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_VIDEO_ENC_PARAMS);
264 ✗ if (sd) {
265 ✗ AVVideoEncParams *par = (AVVideoEncParams*)sd->data;
266 ✗ const ptrdiff_t stride = frame->linesize[0];
267
268 ✗ if (par->nb_blocks) {
269 ✗ for (int block_idx = 0; block_idx < par->nb_blocks; block_idx++) {
270 ✗ AVVideoBlockParams *b = av_video_enc_params_block(par, block_idx);
271 ✗ uint8_t *buf = frame->data[0] + b->src_y * stride;
272
273 ✗ draw_block_rectangle(buf, b->src_x, b->src_y, b->w, b->h, stride, 100);
274 }
275 }
276 }
277 }
278
279
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 67 if (s->mv || s->mv_type) {
280 67 AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS);
281
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 67 if (sd) {
282 int i;
283 31 const AVMotionVector *mvs = (const AVMotionVector *)sd->data;
284
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 31 const int is_iframe = (s->frame_type & FRAME_TYPE_I) && frame->pict_type == AV_PICTURE_TYPE_I;
285
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 31 const int is_pframe = (s->frame_type & FRAME_TYPE_P) && frame->pict_type == AV_PICTURE_TYPE_P;
286
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 31 const int is_bframe = (s->frame_type & FRAME_TYPE_B) && frame->pict_type == AV_PICTURE_TYPE_B;
287
288
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 3591 for (i = 0; i < sd->size / sizeof(*mvs); i++) {
289 3560 const AVMotionVector *mv = &mvs[i];
290 3560 const int direction = mv->source > 0;
291
292
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 3560 if (s->mv_type) {
293 ✗ const int is_fp = direction == 0 && (s->mv_type & MV_TYPE_FOR);
294 ✗ const int is_bp = direction == 1 && (s->mv_type & MV_TYPE_BACK);
295
296 ✗ if ((!s->frame_type && (is_fp || is_bp)) ||
297 ✗ is_iframe && is_fp || is_iframe && is_bp ||
298 ✗ is_pframe && is_fp ||
299 ✗ is_bframe && is_fp || is_bframe && is_bp)
300 ✗ draw_arrow(frame->data[0], mv->dst_x, mv->dst_y, mv->src_x, mv->src_y,
301 ✗ frame->width, frame->height, frame->linesize[0],
302 100, 0, direction);
303
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 3560 } else if (s->mv)
304
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 3560 if ((direction == 0 && (s->mv & MV_P_FOR) && frame->pict_type == AV_PICTURE_TYPE_P) ||
305
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 1936 (direction == 0 && (s->mv & MV_B_FOR) && frame->pict_type == AV_PICTURE_TYPE_B) ||
306
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 1164 (direction == 1 && (s->mv & MV_B_BACK) && frame->pict_type == AV_PICTURE_TYPE_B))
307 3560 draw_arrow(frame->data[0], mv->dst_x, mv->dst_y, mv->src_x, mv->src_y,
308 3560 frame->width, frame->height, frame->linesize[0],
309 100, 0, direction);
310 }
311 }
312 }
313
314 67 return ff_filter_frame(outlink, frame);
315 }
316
317 2 static int config_input(AVFilterLink *inlink)
318 {
319 2 AVFilterContext *ctx = inlink->dst;
320 2 CodecViewContext *s = ctx->priv;
321 2 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
322
323 2 s->hsub = desc->log2_chroma_w;
324 2 s->vsub = desc->log2_chroma_h;
325 2 return 0;
326 }
327
328 static const AVFilterPad codecview_inputs[] = {
329 {
330 .name = "default",
331 .type = AVMEDIA_TYPE_VIDEO,
332 .flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
333 .filter_frame = filter_frame,
334 .config_props = config_input,
335 },
336 };
337
338 const AVFilter ff_vf_codecview = {
339 .name = "codecview",
340 .description = NULL_IF_CONFIG_SMALL("Visualize information about some codecs."),
341 .priv_size = sizeof(CodecViewContext),
342 FILTER_INPUTS(codecview_inputs),
343 FILTER_OUTPUTS(ff_video_default_filterpad),
344 // TODO: we can probably add way more pixel formats without any other
345 // changes; anything with 8-bit luma in first plane should be working
346 FILTER_SINGLE_PIXFMT(AV_PIX_FMT_YUV420P),
347 .priv_class = &codecview_class,
348 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
349 };
350