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path: root/libavfilter/vf_codecview.c (plain)
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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 "avfilter.h"
36#include "internal.h"
37
38#define MV_P_FOR (1<<0)
39#define MV_B_FOR (1<<1)
40#define MV_B_BACK (1<<2)
41#define MV_TYPE_FOR (1<<0)
42#define MV_TYPE_BACK (1<<1)
43#define FRAME_TYPE_I (1<<0)
44#define FRAME_TYPE_P (1<<1)
45#define FRAME_TYPE_B (1<<2)
46
47typedef struct {
48 const AVClass *class;
49 unsigned mv;
50 unsigned frame_type;
51 unsigned mv_type;
52 int hsub, vsub;
53 int qp;
54} CodecViewContext;
55
56#define OFFSET(x) offsetof(CodecViewContext, x)
57#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
58#define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, unit }
59
60static const AVOption codecview_options[] = {
61 { "mv", "set motion vectors to visualize", OFFSET(mv), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv" },
62 CONST("pf", "forward predicted MVs of P-frames", MV_P_FOR, "mv"),
63 CONST("bf", "forward predicted MVs of B-frames", MV_B_FOR, "mv"),
64 CONST("bb", "backward predicted MVs of B-frames", MV_B_BACK, "mv"),
65 { "qp", NULL, OFFSET(qp), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
66 { "mv_type", "set motion vectors type", OFFSET(mv_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv_type" },
67 { "mvt", "set motion vectors type", OFFSET(mv_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv_type" },
68 CONST("fp", "forward predicted MVs", MV_TYPE_FOR, "mv_type"),
69 CONST("bp", "backward predicted MVs", MV_TYPE_BACK, "mv_type"),
70 { "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" },
71 { "ft", "set frame types to visualize motion vectors of", OFFSET(frame_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "frame_type" },
72 CONST("if", "I-frames", FRAME_TYPE_I, "frame_type"),
73 CONST("pf", "P-frames", FRAME_TYPE_P, "frame_type"),
74 CONST("bf", "B-frames", FRAME_TYPE_B, "frame_type"),
75 { NULL }
76};
77
78AVFILTER_DEFINE_CLASS(codecview);
79
80static int query_formats(AVFilterContext *ctx)
81{
82 // TODO: we can probably add way more pixel formats without any other
83 // changes; anything with 8-bit luma in first plane should be working
84 static const enum AVPixelFormat pix_fmts[] = {AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE};
85 AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
86 if (!fmts_list)
87 return AVERROR(ENOMEM);
88 return ff_set_common_formats(ctx, fmts_list);
89}
90
91static int clip_line(int *sx, int *sy, int *ex, int *ey, int maxx)
92{
93 if(*sx > *ex)
94 return clip_line(ex, ey, sx, sy, maxx);
95
96 if (*sx < 0) {
97 if (*ex < 0)
98 return 1;
99 *sy = *ey + (*sy - *ey) * (int64_t)*ex / (*ex - *sx);
100 *sx = 0;
101 }
102
103 if (*ex > maxx) {
104 if (*sx > maxx)
105 return 1;
106 *ey = *sy + (*ey - *sy) * (int64_t)(maxx - *sx) / (*ex - *sx);
107 *ex = maxx;
108 }
109 return 0;
110}
111
112/**
113 * Draw a line from (ex, ey) -> (sx, sy).
114 * @param w width of the image
115 * @param h height of the image
116 * @param stride stride/linesize of the image
117 * @param color color of the arrow
118 */
119static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey,
120 int w, int h, int stride, int color)
121{
122 int x, y, fr, f;
123
124 if (clip_line(&sx, &sy, &ex, &ey, w - 1))
125 return;
126 if (clip_line(&sy, &sx, &ey, &ex, h - 1))
127 return;
128
129 sx = av_clip(sx, 0, w - 1);
130 sy = av_clip(sy, 0, h - 1);
131 ex = av_clip(ex, 0, w - 1);
132 ey = av_clip(ey, 0, h - 1);
133
134 buf[sy * stride + sx] += color;
135
136 if (FFABS(ex - sx) > FFABS(ey - sy)) {
137 if (sx > ex) {
138 FFSWAP(int, sx, ex);
139 FFSWAP(int, sy, ey);
140 }
141 buf += sx + sy * stride;
142 ex -= sx;
143 f = ((ey - sy) << 16) / ex;
144 for (x = 0; x <= ex; x++) {
145 y = (x * f) >> 16;
146 fr = (x * f) & 0xFFFF;
147 buf[ y * stride + x] += (color * (0x10000 - fr)) >> 16;
148 if(fr) buf[(y + 1) * stride + x] += (color * fr ) >> 16;
149 }
150 } else {
151 if (sy > ey) {
152 FFSWAP(int, sx, ex);
153 FFSWAP(int, sy, ey);
154 }
155 buf += sx + sy * stride;
156 ey -= sy;
157 if (ey)
158 f = ((ex - sx) << 16) / ey;
159 else
160 f = 0;
161 for(y= 0; y <= ey; y++){
162 x = (y*f) >> 16;
163 fr = (y*f) & 0xFFFF;
164 buf[y * stride + x ] += (color * (0x10000 - fr)) >> 16;
165 if(fr) buf[y * stride + x + 1] += (color * fr ) >> 16;
166 }
167 }
168}
169
170/**
171 * Draw an arrow from (ex, ey) -> (sx, sy).
172 * @param w width of the image
173 * @param h height of the image
174 * @param stride stride/linesize of the image
175 * @param color color of the arrow
176 */
177static void draw_arrow(uint8_t *buf, int sx, int sy, int ex,
178 int ey, int w, int h, int stride, int color, int tail, int direction)
179{
180 int dx,dy;
181
182 if (direction) {
183 FFSWAP(int, sx, ex);
184 FFSWAP(int, sy, ey);
185 }
186
187 sx = av_clip(sx, -100, w + 100);
188 sy = av_clip(sy, -100, h + 100);
189 ex = av_clip(ex, -100, w + 100);
190 ey = av_clip(ey, -100, h + 100);
191
192 dx = ex - sx;
193 dy = ey - sy;
194
195 if (dx * dx + dy * dy > 3 * 3) {
196 int rx = dx + dy;
197 int ry = -dx + dy;
198 int length = sqrt((rx * rx + ry * ry) << 8);
199
200 // FIXME subpixel accuracy
201 rx = ROUNDED_DIV(rx * 3 << 4, length);
202 ry = ROUNDED_DIV(ry * 3 << 4, length);
203
204 if (tail) {
205 rx = -rx;
206 ry = -ry;
207 }
208
209 draw_line(buf, sx, sy, sx + rx, sy + ry, w, h, stride, color);
210 draw_line(buf, sx, sy, sx - ry, sy + rx, w, h, stride, color);
211 }
212 draw_line(buf, sx, sy, ex, ey, w, h, stride, color);
213}
214
215static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
216{
217 AVFilterContext *ctx = inlink->dst;
218 CodecViewContext *s = ctx->priv;
219 AVFilterLink *outlink = ctx->outputs[0];
220
221 if (s->qp) {
222 int qstride, qp_type;
223 int8_t *qp_table = av_frame_get_qp_table(frame, &qstride, &qp_type);
224
225 if (qp_table) {
226 int x, y;
227 const int w = AV_CEIL_RSHIFT(frame->width, s->hsub);
228 const int h = AV_CEIL_RSHIFT(frame->height, s->vsub);
229 uint8_t *pu = frame->data[1];
230 uint8_t *pv = frame->data[2];
231 const int lzu = frame->linesize[1];
232 const int lzv = frame->linesize[2];
233
234 for (y = 0; y < h; y++) {
235 for (x = 0; x < w; x++) {
236 const int qp = ff_norm_qscale(qp_table[(y >> 3) * qstride + (x >> 3)], qp_type) * 128/31;
237 pu[x] = pv[x] = qp;
238 }
239 pu += lzu;
240 pv += lzv;
241 }
242 }
243 }
244
245 if (s->mv || s->mv_type) {
246 AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS);
247 if (sd) {
248 int i;
249 const AVMotionVector *mvs = (const AVMotionVector *)sd->data;
250 const int is_iframe = (s->frame_type & FRAME_TYPE_I) && frame->pict_type == AV_PICTURE_TYPE_I;
251 const int is_pframe = (s->frame_type & FRAME_TYPE_P) && frame->pict_type == AV_PICTURE_TYPE_P;
252 const int is_bframe = (s->frame_type & FRAME_TYPE_B) && frame->pict_type == AV_PICTURE_TYPE_B;
253
254 for (i = 0; i < sd->size / sizeof(*mvs); i++) {
255 const AVMotionVector *mv = &mvs[i];
256 const int direction = mv->source > 0;
257
258 if (s->mv_type) {
259 const int is_fp = direction == 0 && (s->mv_type & MV_TYPE_FOR);
260 const int is_bp = direction == 1 && (s->mv_type & MV_TYPE_BACK);
261
262 if ((!s->frame_type && (is_fp || is_bp)) ||
263 is_iframe && is_fp || is_iframe && is_bp ||
264 is_pframe && is_fp ||
265 is_bframe && is_fp || is_bframe && is_bp)
266 draw_arrow(frame->data[0], mv->dst_x, mv->dst_y, mv->src_x, mv->src_y,
267 frame->width, frame->height, frame->linesize[0],
268 100, 0, direction);
269 } else if (s->mv)
270 if ((direction == 0 && (s->mv & MV_P_FOR) && frame->pict_type == AV_PICTURE_TYPE_P) ||
271 (direction == 0 && (s->mv & MV_B_FOR) && frame->pict_type == AV_PICTURE_TYPE_B) ||
272 (direction == 1 && (s->mv & MV_B_BACK) && frame->pict_type == AV_PICTURE_TYPE_B))
273 draw_arrow(frame->data[0], mv->dst_x, mv->dst_y, mv->src_x, mv->src_y,
274 frame->width, frame->height, frame->linesize[0],
275 100, 0, direction);
276 }
277 }
278 }
279
280 return ff_filter_frame(outlink, frame);
281}
282
283static int config_input(AVFilterLink *inlink)
284{
285 AVFilterContext *ctx = inlink->dst;
286 CodecViewContext *s = ctx->priv;
287 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
288
289 s->hsub = desc->log2_chroma_w;
290 s->vsub = desc->log2_chroma_h;
291 return 0;
292}
293
294static const AVFilterPad codecview_inputs[] = {
295 {
296 .name = "default",
297 .type = AVMEDIA_TYPE_VIDEO,
298 .filter_frame = filter_frame,
299 .config_props = config_input,
300 .needs_writable = 1,
301 },
302 { NULL }
303};
304
305static const AVFilterPad codecview_outputs[] = {
306 {
307 .name = "default",
308 .type = AVMEDIA_TYPE_VIDEO,
309 },
310 { NULL }
311};
312
313AVFilter ff_vf_codecview = {
314 .name = "codecview",
315 .description = NULL_IF_CONFIG_SMALL("Visualize information about some codecs."),
316 .priv_size = sizeof(CodecViewContext),
317 .query_formats = query_formats,
318 .inputs = codecview_inputs,
319 .outputs = codecview_outputs,
320 .priv_class = &codecview_class,
321 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
322};
323
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