FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
f_drawgraph.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2015 Paul B Mahol
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "float.h"
22 
23 #include "libavutil/eval.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/opt.h"
26 #include "avfilter.h"
27 #include "formats.h"
28 #include "internal.h"
29 #include "video.h"
30 
31 typedef struct DrawGraphContext {
32  const AVClass *class;
33 
34  char *key[4];
35  float min, max;
36  char *fg_str[4];
38  uint8_t bg[4];
39  int mode;
40  int slide;
41  int w, h;
42 
44  int x;
45  int prev_y[4];
46  int first;
47  float *values[4];
48  int values_size[4];
49  int nb_values;
51 
52 #define OFFSET(x) offsetof(DrawGraphContext, x)
53 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
54 
55 static const AVOption drawgraph_options[] = {
56  { "m1", "set 1st metadata key", OFFSET(key[0]), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS },
57  { "fg1", "set 1st foreground color expression", OFFSET(fg_str[0]), AV_OPT_TYPE_STRING, {.str="0xffff0000"}, CHAR_MIN, CHAR_MAX, FLAGS },
58  { "m2", "set 2nd metadata key", OFFSET(key[1]), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS },
59  { "fg2", "set 2nd foreground color expression", OFFSET(fg_str[1]), AV_OPT_TYPE_STRING, {.str="0xff00ff00"}, CHAR_MIN, CHAR_MAX, FLAGS },
60  { "m3", "set 3rd metadata key", OFFSET(key[2]), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS },
61  { "fg3", "set 3rd foreground color expression", OFFSET(fg_str[2]), AV_OPT_TYPE_STRING, {.str="0xffff00ff"}, CHAR_MIN, CHAR_MAX, FLAGS },
62  { "m4", "set 4th metadata key", OFFSET(key[3]), AV_OPT_TYPE_STRING, {.str=""}, CHAR_MIN, CHAR_MAX, FLAGS },
63  { "fg4", "set 4th foreground color expression", OFFSET(fg_str[3]), AV_OPT_TYPE_STRING, {.str="0xffffff00"}, CHAR_MIN, CHAR_MAX, FLAGS },
64  { "bg", "set background color", OFFSET(bg), AV_OPT_TYPE_COLOR, {.str="white"}, CHAR_MIN, CHAR_MAX, FLAGS },
65  { "min", "set minimal value", OFFSET(min), AV_OPT_TYPE_FLOAT, {.dbl=-1.}, INT_MIN, INT_MAX, FLAGS },
66  { "max", "set maximal value", OFFSET(max), AV_OPT_TYPE_FLOAT, {.dbl=1.}, INT_MIN, INT_MAX, FLAGS },
67  { "mode", "set graph mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=2}, 0, 2, FLAGS, "mode" },
68  {"bar", "draw bars", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mode"},
69  {"dot", "draw dots", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mode"},
70  {"line", "draw lines", OFFSET(mode), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "mode"},
71  { "slide", "set slide mode", OFFSET(slide), AV_OPT_TYPE_INT, {.i64=0}, 0, 4, FLAGS, "slide" },
72  {"frame", "draw new frames", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "slide"},
73  {"replace", "replace old columns with new", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "slide"},
74  {"scroll", "scroll from right to left", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "slide"},
75  {"rscroll", "scroll from left to right", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, "slide"},
76  {"picture", "display graph in single frame", OFFSET(slide), AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, FLAGS, "slide"},
77  { "size", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
78  { "s", "set graph size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="900x256"}, 0, 0, FLAGS },
79  { NULL }
80 };
81 
82 static const char *const var_names[] = { "MAX", "MIN", "VAL", NULL };
84 
86 {
87  DrawGraphContext *s = ctx->priv;
88  int ret, i;
89 
90  if (s->max <= s->min) {
91  av_log(ctx, AV_LOG_ERROR, "max is same or lower than min\n");
92  return AVERROR(EINVAL);
93  }
94 
95  for (i = 0; i < 4; i++) {
96  if (s->fg_str[i]) {
97  ret = av_expr_parse(&s->fg_expr[i], s->fg_str[i], var_names,
98  NULL, NULL, NULL, NULL, 0, ctx);
99 
100  if (ret < 0)
101  return ret;
102  }
103  }
104 
105  s->first = 1;
106 
107  if (s->slide == 4) {
108  s->values[0] = av_fast_realloc(NULL, &s->values_size[0], 2000);
109  s->values[1] = av_fast_realloc(NULL, &s->values_size[1], 2000);
110  s->values[2] = av_fast_realloc(NULL, &s->values_size[2], 2000);
111  s->values[3] = av_fast_realloc(NULL, &s->values_size[3], 2000);
112 
113  if (!s->values[0] || !s->values[1] ||
114  !s->values[2] || !s->values[3]) {
115  return AVERROR(ENOMEM);
116  }
117  }
118 
119  return 0;
120 }
121 
123 {
124  AVFilterLink *outlink = ctx->outputs[0];
125  static const enum AVPixelFormat pix_fmts[] = {
128  };
129  int ret;
130 
131  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
132  if ((ret = ff_formats_ref(fmts_list, &outlink->in_formats)) < 0)
133  return ret;
134 
135  return 0;
136 }
137 
139 {
140  int i, j;
141  int bg = AV_RN32(s->bg);
142 
143  for (i = 0; i < out->height; i++)
144  for (j = 0; j < out->width; j++)
145  AV_WN32(out->data[0] + i * out->linesize[0] + j * 4, bg);
146 }
147 
148 static inline void draw_dot(int fg, int x, int y, AVFrame *out)
149 {
150  AV_WN32(out->data[0] + y * out->linesize[0] + x * 4, fg);
151 }
152 
153 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
154 {
155  AVFilterContext *ctx = inlink->dst;
156  DrawGraphContext *s = ctx->priv;
157  AVFilterLink *outlink = ctx->outputs[0];
158  AVDictionary *metadata;
160  AVFrame *out = s->out;
161  int i;
162 
163  if (s->slide == 4 && s->nb_values >= s->values_size[0] / sizeof(float)) {
164  float *ptr;
165 
166  ptr = av_fast_realloc(s->values[0], &s->values_size[0], s->values_size[0] * 2);
167  if (!ptr)
168  return AVERROR(ENOMEM);
169  s->values[0] = ptr;
170 
171  ptr = av_fast_realloc(s->values[1], &s->values_size[1], s->values_size[1] * 2);
172  if (!ptr)
173  return AVERROR(ENOMEM);
174  s->values[1] = ptr;
175 
176  ptr = av_fast_realloc(s->values[2], &s->values_size[2], s->values_size[2] * 2);
177  if (!ptr)
178  return AVERROR(ENOMEM);
179  s->values[2] = ptr;
180 
181  ptr = av_fast_realloc(s->values[3], &s->values_size[3], s->values_size[3] * 2);
182  if (!ptr)
183  return AVERROR(ENOMEM);
184  s->values[3] = ptr;
185  }
186 
187  if (s->slide != 4 || s->nb_values == 0) {
188  if (!s->out || s->out->width != outlink->w ||
189  s->out->height != outlink->h) {
190  av_frame_free(&s->out);
191  s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
192  out = s->out;
193  if (!s->out) {
194  av_frame_free(&in);
195  return AVERROR(ENOMEM);
196  }
197 
198  clear_image(s, out, outlink);
199  }
200  av_frame_copy_props(out, in);
201  }
202 
203  metadata = av_frame_get_metadata(in);
204 
205  for (i = 0; i < 4; i++) {
206  double values[VAR_VARS_NB];
207  int j, y, x, old;
208  uint32_t fg, bg;
209  float vf;
210 
211  if (s->slide == 4)
212  s->values[i][s->nb_values] = NAN;
213 
214  e = av_dict_get(metadata, s->key[i], NULL, 0);
215  if (!e || !e->value)
216  continue;
217 
218  if (sscanf(e->value, "%f", &vf) != 1)
219  continue;
220 
221  vf = av_clipf(vf, s->min, s->max);
222 
223  if (s->slide == 4) {
224  s->values[i][s->nb_values] = vf;
225  continue;
226  }
227 
228  values[VAR_MIN] = s->min;
229  values[VAR_MAX] = s->max;
230  values[VAR_VAL] = vf;
231 
232  fg = av_expr_eval(s->fg_expr[i], values, NULL);
233  bg = AV_RN32(s->bg);
234 
235  if (i == 0 && (s->x >= outlink->w || s->slide == 3)) {
236  if (s->slide == 0 || s->slide == 1)
237  s->x = 0;
238 
239  if (s->slide == 2) {
240  s->x = outlink->w - 1;
241  for (j = 0; j < outlink->h; j++) {
242  memmove(out->data[0] + j * out->linesize[0] ,
243  out->data[0] + j * out->linesize[0] + 4,
244  (outlink->w - 1) * 4);
245  }
246  } else if (s->slide == 3) {
247  s->x = 0;
248  for (j = 0; j < outlink->h; j++) {
249  memmove(out->data[0] + j * out->linesize[0] + 4,
250  out->data[0] + j * out->linesize[0],
251  (outlink->w - 1) * 4);
252  }
253  } else if (s->slide == 0) {
254  clear_image(s, out, outlink);
255  }
256  }
257 
258  x = s->x;
259  y = (outlink->h - 1) * (1 - ((vf - s->min) / (s->max - s->min)));
260 
261  switch (s->mode) {
262  case 0:
263  if (i == 0 && (s->slide > 0))
264  for (j = 0; j < outlink->h; j++)
265  draw_dot(bg, x, j, out);
266 
267  old = AV_RN32(out->data[0] + y * out->linesize[0] + x * 4);
268  for (j = y; j < outlink->h; j++) {
269  if (old != bg &&
270  (AV_RN32(out->data[0] + j * out->linesize[0] + x * 4) != old) ||
271  AV_RN32(out->data[0] + FFMIN(j+1, outlink->h - 1) * out->linesize[0] + x * 4) != old) {
272  draw_dot(fg, x, j, out);
273  break;
274  }
275  draw_dot(fg, x, j, out);
276  }
277  break;
278  case 1:
279  if (i == 0 && (s->slide > 0))
280  for (j = 0; j < outlink->h; j++)
281  draw_dot(bg, x, j, out);
282  draw_dot(fg, x, y, out);
283  break;
284  case 2:
285  if (s->first) {
286  s->first = 0;
287  s->prev_y[i] = y;
288  }
289 
290  if (i == 0 && (s->slide > 0)) {
291  for (j = 0; j < y; j++)
292  draw_dot(bg, x, j, out);
293  for (j = outlink->h - 1; j > y; j--)
294  draw_dot(bg, x, j, out);
295  }
296  if (y <= s->prev_y[i]) {
297  for (j = y; j <= s->prev_y[i]; j++)
298  draw_dot(fg, x, j, out);
299  } else {
300  for (j = s->prev_y[i]; j <= y; j++)
301  draw_dot(fg, x, j, out);
302  }
303  s->prev_y[i] = y;
304  break;
305  }
306  }
307 
308  s->nb_values++;
309  s->x++;
310 
311  av_frame_free(&in);
312 
313  if (s->slide == 4)
314  return 0;
315 
316  return ff_filter_frame(outlink, av_frame_clone(s->out));
317 }
318 
319 static int request_frame(AVFilterLink *outlink)
320 {
321  AVFilterContext *ctx = outlink->src;
322  DrawGraphContext *s = ctx->priv;
323  AVFrame *out = s->out;
324  int ret, i, k, step, l;
325 
326  ret = ff_request_frame(ctx->inputs[0]);
327 
328  if (s->slide == 4 && ret == AVERROR_EOF && s->nb_values > 0) {
329  s->x = l = 0;
330  step = ceil(s->nb_values / (float)s->w);
331 
332  for (k = 0; k < s->nb_values; k++) {
333  for (i = 0; i < 4; i++) {
334  double values[VAR_VARS_NB];
335  int j, y, x, old;
336  uint32_t fg, bg;
337  float vf = s->values[i][k];
338 
339  if (isnan(vf))
340  continue;
341 
342  values[VAR_MIN] = s->min;
343  values[VAR_MAX] = s->max;
344  values[VAR_VAL] = vf;
345 
346  fg = av_expr_eval(s->fg_expr[i], values, NULL);
347  bg = AV_RN32(s->bg);
348 
349  x = s->x;
350  y = (outlink->h - 1) * (1 - ((vf - s->min) / (s->max - s->min)));
351 
352  switch (s->mode) {
353  case 0:
354  old = AV_RN32(out->data[0] + y * out->linesize[0] + x * 4);
355  for (j = y; j < outlink->h; j++) {
356  if (old != bg &&
357  (AV_RN32(out->data[0] + j * out->linesize[0] + x * 4) != old) ||
358  AV_RN32(out->data[0] + FFMIN(j+1, outlink->h - 1) * out->linesize[0] + x * 4) != old) {
359  draw_dot(fg, x, j, out);
360  break;
361  }
362  draw_dot(fg, x, j, out);
363  }
364  break;
365  case 1:
366  draw_dot(fg, x, y, out);
367  break;
368  case 2:
369  if (s->first) {
370  s->first = 0;
371  s->prev_y[i] = y;
372  }
373 
374  if (y <= s->prev_y[i]) {
375  for (j = y; j <= s->prev_y[i]; j++)
376  draw_dot(fg, x, j, out);
377  } else {
378  for (j = s->prev_y[i]; j <= y; j++)
379  draw_dot(fg, x, j, out);
380  }
381  s->prev_y[i] = y;
382  break;
383  }
384  }
385 
386  l++;
387  if (l >= step) {
388  l = 0;
389  s->x++;
390  }
391  }
392 
393  s->nb_values = 0;
394  out->pts = 0;
395  ret = ff_filter_frame(ctx->outputs[0], s->out);
396  }
397 
398  return ret;
399 }
400 
401 static int config_output(AVFilterLink *outlink)
402 {
403  DrawGraphContext *s = outlink->src->priv;
404 
405  outlink->w = s->w;
406  outlink->h = s->h;
407  outlink->sample_aspect_ratio = (AVRational){1,1};
408 
409  return 0;
410 }
411 
413 {
414  DrawGraphContext *s = ctx->priv;
415  int i;
416 
417  for (i = 0; i < 4; i++)
418  av_expr_free(s->fg_expr[i]);
419 
420  if (s->slide != 4)
421  av_frame_free(&s->out);
422 
423  av_freep(&s->values[0]);
424  av_freep(&s->values[1]);
425  av_freep(&s->values[2]);
426  av_freep(&s->values[3]);
427 }
428 
429 #if CONFIG_DRAWGRAPH_FILTER
430 
431 AVFILTER_DEFINE_CLASS(drawgraph);
432 
433 static const AVFilterPad drawgraph_inputs[] = {
434  {
435  .name = "default",
436  .type = AVMEDIA_TYPE_VIDEO,
437  .filter_frame = filter_frame,
438  },
439  { NULL }
440 };
441 
442 static const AVFilterPad drawgraph_outputs[] = {
443  {
444  .name = "default",
445  .type = AVMEDIA_TYPE_VIDEO,
446  .config_props = config_output,
447  .request_frame = request_frame,
448  },
449  { NULL }
450 };
451 
452 AVFilter ff_vf_drawgraph = {
453  .name = "drawgraph",
454  .description = NULL_IF_CONFIG_SMALL("Draw a graph using input video metadata."),
455  .priv_size = sizeof(DrawGraphContext),
456  .priv_class = &drawgraph_class,
458  .init = init,
459  .uninit = uninit,
460  .inputs = drawgraph_inputs,
461  .outputs = drawgraph_outputs,
462 };
463 
464 #endif // CONFIG_DRAWGRAPH_FILTER
465 
466 #if CONFIG_ADRAWGRAPH_FILTER
467 
468 #define adrawgraph_options drawgraph_options
469 AVFILTER_DEFINE_CLASS(adrawgraph);
470 
471 static const AVFilterPad adrawgraph_inputs[] = {
472  {
473  .name = "default",
474  .type = AVMEDIA_TYPE_AUDIO,
475  .filter_frame = filter_frame,
476  },
477  { NULL }
478 };
479 
480 static const AVFilterPad adrawgraph_outputs[] = {
481  {
482  .name = "default",
483  .type = AVMEDIA_TYPE_VIDEO,
484  .config_props = config_output,
485  .request_frame = request_frame,
486  },
487  { NULL }
488 };
489 
490 AVFilter ff_avf_adrawgraph = {
491  .name = "adrawgraph",
492  .description = NULL_IF_CONFIG_SMALL("Draw a graph using input audio metadata."),
493  .priv_size = sizeof(DrawGraphContext),
494  .priv_class = &adrawgraph_class,
496  .init = init,
497  .uninit = uninit,
498  .inputs = adrawgraph_inputs,
499  .outputs = adrawgraph_outputs,
500 };
501 #endif // CONFIG_ADRAWGRAPH_FILTER
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
static av_cold int init(AVFilterContext *ctx)
Definition: f_drawgraph.c:85
This structure describes decoded (raw) audio or video data.
Definition: frame.h:187
static void draw_dot(int fg, int x, int y, AVFrame *out)
Definition: f_drawgraph.c:148
AVOption.
Definition: opt.h:246
AVFrame * out
Definition: f_drawgraph.c:43
Main libavfilter public API header.
static const char *const var_names[]
Definition: f_drawgraph.c:82
int av_expr_parse(AVExpr **expr, const char *s, const char *const *const_names, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), int log_offset, void *log_ctx)
Parse an expression.
Definition: eval.c:661
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:92
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: f_drawgraph.c:153
int values_size[4]
Definition: f_drawgraph.c:48
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
const char * name
Pad name.
Definition: internal.h:60
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:331
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1125
static const AVOption drawgraph_options[]
Definition: f_drawgraph.c:55
uint8_t
#define av_cold
Definition: attributes.h:82
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:271
Definition: eval.c:150
static void clear_image(DrawGraphContext *s, AVFrame *out, AVFilterLink *outlink)
Definition: f_drawgraph.c:138
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
char * key[4]
Definition: f_drawgraph.c:34
#define AVERROR_EOF
End of file.
Definition: error.h:55
static av_cold void uninit(AVFilterContext *ctx)
Definition: f_drawgraph.c:412
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:54
static int request_frame(AVFilterLink *outlink)
Definition: f_drawgraph.c:319
static int config_output(AVFilterLink *outlink)
Definition: f_drawgraph.c:401
int width
width and height of the video frame
Definition: frame.h:239
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
float * values[4]
Definition: f_drawgraph.c:47
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:163
#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
uint8_t bg[4]
Definition: f_drawgraph.c:38
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:94
#define FFMIN(a, b)
Definition: common.h:96
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:440
AVFormatContext * ctx
Definition: movenc.c:48
#define FLAGS
Definition: f_drawgraph.c:53
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given buffer if it is not large enough, otherwise do nothing.
Definition: mem.c:450
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:485
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
#define OFFSET(x)
Definition: f_drawgraph.c:52
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:320
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:218
AVExpr * fg_expr[4]
Definition: f_drawgraph.c:37
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
AVDictionary * av_frame_get_metadata(const AVFrame *frame)
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
Rational number (pair of numerator and denominator).
Definition: rational.h:58
#define isnan(x)
Definition: libm.h:340
const char * name
Filter name.
Definition: avfilter.h:148
offset must point to two consecutive integers
Definition: opt.h:233
#define AV_RN32(p)
Definition: intreadwrite.h:369
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:335
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
#define AV_WN32(p, v)
Definition: intreadwrite.h:381
static int query_formats(AVFilterContext *ctx)
Definition: f_drawgraph.c:122
char * value
Definition: dict.h:87
#define NAN
Definition: math.h:28
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:716
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:342
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
FILE * out
Definition: movenc.c:54
char * fg_str[4]
Definition: f_drawgraph.c:36
#define av_freep(p)
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:405
internal API functions
float min
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:596
simple arithmetic expression evaluator