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vf_codecview.c
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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"
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 
47 typedef struct {
48  const AVClass *class;
49  unsigned mv;
50  unsigned frame_type;
51  unsigned mv_type;
52  int hsub, vsub;
53  int qp;
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 
60 static 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 
78 AVFILTER_DEFINE_CLASS(codecview);
79 
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
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 
91 static 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  */
119 static 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  */
177 static 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 
215 static 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) {
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 
283 static int config_input(AVFilterLink *inlink)
284 {
285  AVFilterContext *ctx = inlink->dst;
286  CodecViewContext *s = ctx->priv;
288 
289  s->hsub = desc->log2_chroma_w;
290  s->vsub = desc->log2_chroma_h;
291  return 0;
292 }
293 
294 static 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 
305 static const AVFilterPad codecview_outputs[] = {
306  {
307  .name = "default",
308  .type = AVMEDIA_TYPE_VIDEO,
309  },
310  { NULL }
311 };
312 
314  .name = "codecview",
315  .description = NULL_IF_CONFIG_SMALL("Visualize information about some codecs."),
316  .priv_size = sizeof(CodecViewContext),
318  .inputs = codecview_inputs,
319  .outputs = codecview_outputs,
320  .priv_class = &codecview_class,
322 };
#define MV_B_BACK
Definition: vf_codecview.c:40
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2333
This structure describes decoded (raw) audio or video data.
Definition: frame.h:187
AVOption.
Definition: opt.h:246
#define FRAME_TYPE_I
Definition: vf_codecview.c:43
misc image utilities
int16_t src_x
Absolute source position.
Definition: motion_vector.h:38
Main libavfilter public API header.
const char * desc
Definition: nvenc.c:60
unsigned mv_type
Definition: vf_codecview.c:51
static const AVFilterPad codecview_outputs[]
Definition: vf_codecview.c:305
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: vf_codecview.c:215
static const AVOption codecview_options[]
Definition: vf_codecview.c:60
#define FLAGS
Definition: vf_codecview.c:57
int8_t * av_frame_get_qp_table(AVFrame *f, int *stride, int *type)
Definition: frame.c:69
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
Definition: frame.c:675
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:125
const char * name
Pad name.
Definition: internal.h:60
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1125
uint8_t
AVOptions.
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94
int16_t dst_x
Absolute destination position.
Definition: motion_vector.h:42
static AVFrame * frame
Structure to hold side data for an AVFrame.
Definition: frame.h:149
int32_t source
Where the current macroblock comes from; negative value when it comes from the past, positive value when it comes from the future.
Definition: motion_vector.h:30
static int flags
Definition: log.c:57
#define MV_P_FOR
Definition: vf_codecview.c:38
static void draw_arrow(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int stride, int color, int tail, int direction)
Draw an arrow from (ex, ey) -> (sx, sy).
Definition: vf_codecview.c:177
#define ROUNDED_DIV(a, b)
Definition: common.h:56
A filter pad used for either input or output.
Definition: internal.h:54
static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int stride, int color)
Draw a line from (ex, ey) -> (sx, sy).
Definition: vf_codecview.c:119
#define MV_B_FOR
Definition: vf_codecview.c:39
int width
width and height of the video frame
Definition: frame.h:239
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:568
#define CONST(name, help, val, unit)
Definition: vf_codecview.c:58
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
#define AVERROR(e)
Definition: error.h:43
#define pv
Definition: regdef.h:60
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
void * priv
private data for use by the filter
Definition: avfilter.h:338
AVFilter ff_vf_codecview
Definition: vf_codecview.c:313
GLsizei GLsizei * length
Definition: opengl_enc.c:115
#define FRAME_TYPE_B
Definition: vf_codecview.c:45
AVFILTER_DEFINE_CLASS(codecview)
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:261
AVFormatContext * ctx
Definition: movenc.c:48
Motion vectors exported by some codecs (on demand through the export_mvs flag set in the libavcodec A...
Definition: frame.h:95
#define OFFSET(x)
Definition: vf_codecview.c:56
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
static const int8_t mv[256][2]
Definition: 4xm.c:77
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
#define MV_TYPE_BACK
Definition: vf_codecview.c:42
static int query_formats(AVFilterContext *ctx)
Definition: vf_codecview.c:80
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:218
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
static int clip_line(int *sx, int *sy, int *ex, int *ey, int maxx)
Definition: vf_codecview.c:91
unsigned frame_type
Definition: vf_codecview.c:50
uint8_t * data
Definition: frame.h:151
void * buf
Definition: avisynth_c.h:690
#define MV_TYPE_FOR
Definition: vf_codecview.c:41
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
#define FRAME_TYPE_P
Definition: vf_codecview.c:44
const char * name
Filter name.
Definition: avfilter.h:148
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:335
static int ff_norm_qscale(int qscale, int type)
Normalize the qscale factor FIXME the H264 qscale is a log based scale, mpeg1/2 is not...
Definition: internal.h:405
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:201
static int config_input(AVFilterLink *inlink)
Definition: vf_codecview.c:283
static const AVFilterPad codecview_inputs[]
Definition: vf_codecview.c:294
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
Bi-dir predicted.
Definition: avutil.h:276
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:323
int height
Definition: frame.h:239
#define FFSWAP(type, a, b)
Definition: common.h:99
#define stride
internal API functions
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
Predicted.
Definition: avutil.h:275
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58