FFmpeg
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
vf_frei0r.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2010 Stefano Sabatini
3  * This file is part of FFmpeg.
4  *
5  * FFmpeg is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * FFmpeg is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with FFmpeg; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 
20 /**
21  * @file
22  * frei0r wrapper
23  */
24 
25 /* #define DEBUG */
26 
27 #include <dlfcn.h>
28 #include <frei0r.h>
29 #include <stdio.h>
30 #include <string.h>
31 #include <stdlib.h>
32 #include "config.h"
33 #include "libavutil/avstring.h"
34 #include "libavutil/imgutils.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/mem.h"
38 #include "libavutil/parseutils.h"
39 #include "avfilter.h"
40 #include "formats.h"
41 #include "internal.h"
42 #include "video.h"
43 
44 typedef f0r_instance_t (*f0r_construct_f)(unsigned int width, unsigned int height);
45 typedef void (*f0r_destruct_f)(f0r_instance_t instance);
46 typedef void (*f0r_deinit_f)(void);
47 typedef int (*f0r_init_f)(void);
48 typedef void (*f0r_get_plugin_info_f)(f0r_plugin_info_t *info);
49 typedef void (*f0r_get_param_info_f)(f0r_param_info_t *info, int param_index);
50 typedef void (*f0r_update_f)(f0r_instance_t instance, double time, const uint32_t *inframe, uint32_t *outframe);
51 typedef void (*f0r_update2_f)(f0r_instance_t instance, double time, const uint32_t *inframe1, const uint32_t *inframe2, const uint32_t *inframe3, uint32_t *outframe);
52 typedef void (*f0r_set_param_value_f)(f0r_instance_t instance, f0r_param_t param, int param_index);
53 typedef void (*f0r_get_param_value_f)(f0r_instance_t instance, f0r_param_t param, int param_index);
54 
55 typedef struct Frei0rContext {
57  void *dl_handle; /* dynamic library handle */
58  f0r_instance_t instance;
59  f0r_plugin_info_t plugin_info;
60 
67  char params[256];
68 
69  /* only used by the source */
70  int w, h;
72  uint64_t pts;
74 
75 static void *load_sym(AVFilterContext *ctx, const char *sym_name)
76 {
77  Frei0rContext *frei0r = ctx->priv;
78  void *sym = dlsym(frei0r->dl_handle, sym_name);
79  if (!sym)
80  av_log(ctx, AV_LOG_ERROR, "Could not find symbol '%s' in loaded module\n", sym_name);
81  return sym;
82 }
83 
84 static int set_param(AVFilterContext *ctx, f0r_param_info_t info, int index, char *param)
85 {
86  Frei0rContext *frei0r = ctx->priv;
87  union {
88  double d;
89  f0r_param_color_t col;
90  f0r_param_position_t pos;
91  } val;
92  char *tail;
93  uint8_t rgba[4];
94 
95  switch (info.type) {
96  case F0R_PARAM_BOOL:
97  if (!strcmp(param, "y")) val.d = 1.0;
98  else if (!strcmp(param, "n")) val.d = 0.0;
99  else goto fail;
100  break;
101 
102  case F0R_PARAM_DOUBLE:
103  val.d = strtod(param, &tail);
104  if (*tail || val.d == HUGE_VAL)
105  goto fail;
106  break;
107 
108  case F0R_PARAM_COLOR:
109  if (sscanf(param, "%f/%f/%f", &val.col.r, &val.col.g, &val.col.b) != 3) {
110  if (av_parse_color(rgba, param, -1, ctx) < 0)
111  goto fail;
112  val.col.r = rgba[0] / 255.0;
113  val.col.g = rgba[1] / 255.0;
114  val.col.b = rgba[2] / 255.0;
115  }
116  break;
117 
118  case F0R_PARAM_POSITION:
119  if (sscanf(param, "%lf/%lf", &val.pos.x, &val.pos.y) != 2)
120  goto fail;
121  break;
122  }
123 
124  frei0r->set_param_value(frei0r->instance, &val, index);
125  return 0;
126 
127 fail:
128  av_log(ctx, AV_LOG_ERROR, "Invalid value '%s' for parameter '%s'\n",
129  param, info.name);
130  return AVERROR(EINVAL);
131 }
132 
133 static int set_params(AVFilterContext *ctx, const char *params)
134 {
135  Frei0rContext *frei0r = ctx->priv;
136  int i;
137 
138  for (i = 0; i < frei0r->plugin_info.num_params; i++) {
139  f0r_param_info_t info;
140  char *param;
141  int ret;
142 
143  frei0r->get_param_info(&info, i);
144 
145  if (*params) {
146  if (!(param = av_get_token(&params, ":")))
147  return AVERROR(ENOMEM);
148  params++; /* skip ':' */
149  ret = set_param(ctx, info, i, param);
150  av_free(param);
151  if (ret < 0)
152  return ret;
153  }
154 
155  av_log(ctx, AV_LOG_VERBOSE,
156  "idx:%d name:'%s' type:%s explanation:'%s' ",
157  i, info.name,
158  info.type == F0R_PARAM_BOOL ? "bool" :
159  info.type == F0R_PARAM_DOUBLE ? "double" :
160  info.type == F0R_PARAM_COLOR ? "color" :
161  info.type == F0R_PARAM_POSITION ? "position" :
162  info.type == F0R_PARAM_STRING ? "string" : "unknown",
163  info.explanation);
164 
165 #ifdef DEBUG
166  av_log(ctx, AV_LOG_DEBUG, "value:");
167  switch (info.type) {
168  void *v;
169  double d;
170  char s[128];
171  f0r_param_color_t col;
172  f0r_param_position_t pos;
173 
174  case F0R_PARAM_BOOL:
175  v = &d;
176  frei0r->get_param_value(frei0r->instance, v, i);
177  av_log(ctx, AV_LOG_DEBUG, "%s", d >= 0.5 && d <= 1.0 ? "y" : "n");
178  break;
179  case F0R_PARAM_DOUBLE:
180  v = &d;
181  frei0r->get_param_value(frei0r->instance, v, i);
182  av_log(ctx, AV_LOG_DEBUG, "%f", d);
183  break;
184  case F0R_PARAM_COLOR:
185  v = &col;
186  frei0r->get_param_value(frei0r->instance, v, i);
187  av_log(ctx, AV_LOG_DEBUG, "%f/%f/%f", col.r, col.g, col.b);
188  break;
189  case F0R_PARAM_POSITION:
190  v = &pos;
191  frei0r->get_param_value(frei0r->instance, v, i);
192  av_log(ctx, AV_LOG_DEBUG, "%f/%f", pos.x, pos.y);
193  break;
194  default: /* F0R_PARAM_STRING */
195  v = s;
196  frei0r->get_param_value(frei0r->instance, v, i);
197  av_log(ctx, AV_LOG_DEBUG, "'%s'\n", s);
198  break;
199  }
200 #endif
201  av_log(ctx, AV_LOG_VERBOSE, "\n");
202  }
203 
204  return 0;
205 }
206 
207 static int load_path(AVFilterContext *ctx, void **handle_ptr, const char *prefix, const char *name)
208 {
209  char *path = av_asprintf("%s%s%s", prefix, name, SLIBSUF);
210  if (!path)
211  return AVERROR(ENOMEM);
212  av_log(ctx, AV_LOG_DEBUG, "Looking for frei0r effect in '%s'\n", path);
213  *handle_ptr = dlopen(path, RTLD_NOW|RTLD_LOCAL);
214  av_free(path);
215  return 0;
216 }
217 
219  const char *dl_name, int type)
220 {
221  Frei0rContext *frei0r = ctx->priv;
222  f0r_init_f f0r_init;
223  f0r_get_plugin_info_f f0r_get_plugin_info;
224  f0r_plugin_info_t *pi;
225  char *path;
226  int ret = 0;
227 
228  /* see: http://frei0r.dyne.org/codedoc/html/group__pluglocations.html */
229  if ((path = av_strdup(getenv("FREI0R_PATH")))) {
230 #ifdef _WIN32
231  const char *separator = ";";
232 #else
233  const char *separator = ":";
234 #endif
235  char *p, *ptr = NULL;
236  for (p = path; p = av_strtok(p, separator, &ptr); p = NULL) {
237  /* add additional trailing slash in case it is missing */
238  char *p1 = av_asprintf("%s/", p);
239  if (!p1) {
240  ret = AVERROR(ENOMEM);
241  goto check_path_end;
242  }
243  ret = load_path(ctx, &frei0r->dl_handle, p1, dl_name);
244  av_free(p1);
245  if (ret < 0)
246  goto check_path_end;
247  if (frei0r->dl_handle)
248  break;
249  }
250 
251  check_path_end:
252  av_free(path);
253  if (ret < 0)
254  return ret;
255  }
256  if (!frei0r->dl_handle && (path = getenv("HOME"))) {
257  char *prefix = av_asprintf("%s/.frei0r-1/lib/", path);
258  if (!prefix)
259  return AVERROR(ENOMEM);
260  ret = load_path(ctx, &frei0r->dl_handle, prefix, dl_name);
261  av_free(prefix);
262  if (ret < 0)
263  return ret;
264  }
265  if (!frei0r->dl_handle) {
266  ret = load_path(ctx, &frei0r->dl_handle, "/usr/local/lib/frei0r-1/", dl_name);
267  if (ret < 0)
268  return ret;
269  }
270  if (!frei0r->dl_handle) {
271  ret = load_path(ctx, &frei0r->dl_handle, "/usr/lib/frei0r-1/", dl_name);
272  if (ret < 0)
273  return ret;
274  }
275  if (!frei0r->dl_handle) {
276  av_log(ctx, AV_LOG_ERROR, "Could not find module '%s'\n", dl_name);
277  return AVERROR(EINVAL);
278  }
279 
280  if (!(f0r_init = load_sym(ctx, "f0r_init" )) ||
281  !(f0r_get_plugin_info = load_sym(ctx, "f0r_get_plugin_info")) ||
282  !(frei0r->get_param_info = load_sym(ctx, "f0r_get_param_info" )) ||
283  !(frei0r->get_param_value = load_sym(ctx, "f0r_get_param_value")) ||
284  !(frei0r->set_param_value = load_sym(ctx, "f0r_set_param_value")) ||
285  !(frei0r->update = load_sym(ctx, "f0r_update" )) ||
286  !(frei0r->construct = load_sym(ctx, "f0r_construct" )) ||
287  !(frei0r->destruct = load_sym(ctx, "f0r_destruct" )) ||
288  !(frei0r->deinit = load_sym(ctx, "f0r_deinit" )))
289  return AVERROR(EINVAL);
290 
291  if (f0r_init() < 0) {
292  av_log(ctx, AV_LOG_ERROR, "Could not init the frei0r module\n");
293  return AVERROR(EINVAL);
294  }
295 
296  f0r_get_plugin_info(&frei0r->plugin_info);
297  pi = &frei0r->plugin_info;
298  if (pi->plugin_type != type) {
299  av_log(ctx, AV_LOG_ERROR,
300  "Invalid type '%s' for the plugin\n",
301  pi->plugin_type == F0R_PLUGIN_TYPE_FILTER ? "filter" :
302  pi->plugin_type == F0R_PLUGIN_TYPE_SOURCE ? "source" :
303  pi->plugin_type == F0R_PLUGIN_TYPE_MIXER2 ? "mixer2" :
304  pi->plugin_type == F0R_PLUGIN_TYPE_MIXER3 ? "mixer3" : "unknown");
305  return AVERROR(EINVAL);
306  }
307 
308  av_log(ctx, AV_LOG_VERBOSE,
309  "name:%s author:'%s' explanation:'%s' color_model:%s "
310  "frei0r_version:%d version:%d.%d num_params:%d\n",
311  pi->name, pi->author, pi->explanation,
312  pi->color_model == F0R_COLOR_MODEL_BGRA8888 ? "bgra8888" :
313  pi->color_model == F0R_COLOR_MODEL_RGBA8888 ? "rgba8888" :
314  pi->color_model == F0R_COLOR_MODEL_PACKED32 ? "packed32" : "unknown",
315  pi->frei0r_version, pi->major_version, pi->minor_version, pi->num_params);
316 
317  return 0;
318 }
319 
320 static av_cold int filter_init(AVFilterContext *ctx, const char *args)
321 {
322  Frei0rContext *frei0r = ctx->priv;
323  char dl_name[1024], c;
324  *frei0r->params = 0;
325 
326  if (args)
327  sscanf(args, "%1023[^:=]%c%255c", dl_name, &c, frei0r->params);
328 
329  return frei0r_init(ctx, dl_name, F0R_PLUGIN_TYPE_FILTER);
330 }
331 
332 static av_cold void uninit(AVFilterContext *ctx)
333 {
334  Frei0rContext *frei0r = ctx->priv;
335 
336  if (frei0r->destruct && frei0r->instance)
337  frei0r->destruct(frei0r->instance);
338  if (frei0r->deinit)
339  frei0r->deinit();
340  if (frei0r->dl_handle)
341  dlclose(frei0r->dl_handle);
342 
343  memset(frei0r, 0, sizeof(*frei0r));
344 }
345 
346 static int config_input_props(AVFilterLink *inlink)
347 {
348  AVFilterContext *ctx = inlink->dst;
349  Frei0rContext *frei0r = ctx->priv;
350 
351  if (!(frei0r->instance = frei0r->construct(inlink->w, inlink->h))) {
352  av_log(ctx, AV_LOG_ERROR, "Impossible to load frei0r instance\n");
353  return AVERROR(EINVAL);
354  }
355 
356  return set_params(ctx, frei0r->params);
357 }
358 
360 {
361  Frei0rContext *frei0r = ctx->priv;
363 
364  if (frei0r->plugin_info.color_model == F0R_COLOR_MODEL_BGRA8888) {
365  ff_add_format(&formats, AV_PIX_FMT_BGRA);
366  } else if (frei0r->plugin_info.color_model == F0R_COLOR_MODEL_RGBA8888) {
367  ff_add_format(&formats, AV_PIX_FMT_RGBA);
368  } else { /* F0R_COLOR_MODEL_PACKED32 */
369  static const enum AVPixelFormat pix_fmts[] = {
371  };
372  formats = ff_make_format_list(pix_fmts);
373  }
374 
375  if (!formats)
376  return AVERROR(ENOMEM);
377 
378  ff_set_common_formats(ctx, formats);
379  return 0;
380 }
381 
383 {
384  Frei0rContext *frei0r = inlink->dst->priv;
385  AVFilterLink *outlink = inlink->dst->outputs[0];
387 
388  out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
389  if (!out) {
391  return AVERROR(ENOMEM);
392  }
394 
395  frei0r->update(frei0r->instance, in->pts * av_q2d(inlink->time_base) * 1000,
396  (const uint32_t *)in->data[0],
397  (uint32_t *)out->data[0]);
398 
400 
401  return ff_filter_frame(outlink, out);
402 }
403 
405  {
406  .name = "default",
407  .type = AVMEDIA_TYPE_VIDEO,
408  .config_props = config_input_props,
409  .filter_frame = filter_frame,
410  .min_perms = AV_PERM_READ
411  },
412  { NULL }
413 };
414 
416  {
417  .name = "default",
418  .type = AVMEDIA_TYPE_VIDEO,
419  },
420  { NULL }
421 };
422 
424  .name = "frei0r",
425  .description = NULL_IF_CONFIG_SMALL("Apply a frei0r effect."),
426 
427  .query_formats = query_formats,
428  .init = filter_init,
429  .uninit = uninit,
430 
431  .priv_size = sizeof(Frei0rContext),
432 
433  .inputs = avfilter_vf_frei0r_inputs,
434 
435  .outputs = avfilter_vf_frei0r_outputs,
436 };
437 
438 static av_cold int source_init(AVFilterContext *ctx, const char *args)
439 {
440  Frei0rContext *frei0r = ctx->priv;
441  char dl_name[1024], c;
442  char frame_size[128] = "";
443  char frame_rate[128] = "";
444  AVRational frame_rate_q;
445 
446  memset(frei0r->params, 0, sizeof(frei0r->params));
447 
448  if (args)
449  sscanf(args, "%127[^:]:%127[^:]:%1023[^:=]%c%255c",
450  frame_size, frame_rate, dl_name, &c, frei0r->params);
451 
452  if (av_parse_video_size(&frei0r->w, &frei0r->h, frame_size) < 0) {
453  av_log(ctx, AV_LOG_ERROR, "Invalid frame size: '%s'\n", frame_size);
454  return AVERROR(EINVAL);
455  }
456 
457  if (av_parse_video_rate(&frame_rate_q, frame_rate) < 0) {
458  av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: '%s'\n", frame_rate);
459  return AVERROR(EINVAL);
460  }
461  frei0r->time_base.num = frame_rate_q.den;
462  frei0r->time_base.den = frame_rate_q.num;
463 
464  return frei0r_init(ctx, dl_name, F0R_PLUGIN_TYPE_SOURCE);
465 }
466 
467 static int source_config_props(AVFilterLink *outlink)
468 {
469  AVFilterContext *ctx = outlink->src;
470  Frei0rContext *frei0r = ctx->priv;
471 
472  if (av_image_check_size(frei0r->w, frei0r->h, 0, ctx) < 0)
473  return AVERROR(EINVAL);
474  outlink->w = frei0r->w;
475  outlink->h = frei0r->h;
476  outlink->time_base = frei0r->time_base;
477  outlink->sample_aspect_ratio = (AVRational){1,1};
478 
479  if (!(frei0r->instance = frei0r->construct(outlink->w, outlink->h))) {
480  av_log(ctx, AV_LOG_ERROR, "Impossible to load frei0r instance\n");
481  return AVERROR(EINVAL);
482  }
483 
484  return set_params(ctx, frei0r->params);
485 }
486 
487 static int source_request_frame(AVFilterLink *outlink)
488 {
489  Frei0rContext *frei0r = outlink->src->priv;
490  AVFilterBufferRef *picref = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
491 
492  if (!picref)
493  return AVERROR(ENOMEM);
494 
495  picref->video->sample_aspect_ratio = (AVRational) {1, 1};
496  picref->pts = frei0r->pts++;
497  picref->pos = -1;
498 
499  frei0r->update(frei0r->instance, av_rescale_q(picref->pts, frei0r->time_base, (AVRational){1,1000}),
500  NULL, (uint32_t *)picref->data[0]);
501 
502  return ff_filter_frame(outlink, picref);
503 }
504 
506  {
507  .name = "default",
508  .type = AVMEDIA_TYPE_VIDEO,
509  .request_frame = source_request_frame,
510  .config_props = source_config_props
511  },
512  { NULL }
513 };
514 
516  .name = "frei0r_src",
517  .description = NULL_IF_CONFIG_SMALL("Generate a frei0r source."),
518 
519  .priv_size = sizeof(Frei0rContext),
520  .init = source_init,
521  .uninit = uninit,
522 
524 
525  .inputs = NULL,
526 
527  .outputs = avfilter_vsrc_frei0r_src_outputs,
528 };