FFmpeg
vf_eq.c
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1 /*
2  * Original MPlayer filters by Richard Felker, Hampa Hug, Daniel Moreno,
3  * and Michael Niedermeyer.
4  *
5  * Copyright (c) 2014 James Darnley <james.darnley@gmail.com>
6  * Copyright (c) 2015 Arwa Arif <arwaarif1994@gmail.com>
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License along
21  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
22  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23  */
24 
25 /**
26  * @file
27  * very simple video equalizer
28  */
29 
30 #include "libavfilter/internal.h"
31 #include "libavutil/common.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/pixdesc.h"
35 #include "vf_eq.h"
36 
37 static void create_lut(EQParameters *param)
38 {
39  int i;
40  double g = 1.0 / param->gamma;
41  double lw = 1.0 - param->gamma_weight;
42 
43  for (i = 0; i < 256; i++) {
44  double v = i / 255.0;
45  v = param->contrast * (v - 0.5) + 0.5 + param->brightness;
46 
47  if (v <= 0.0) {
48  param->lut[i] = 0;
49  } else {
50  v = v * lw + pow(v, g) * param->gamma_weight;
51 
52  if (v >= 1.0)
53  param->lut[i] = 255;
54  else
55  param->lut[i] = 256.0 * v;
56  }
57  }
58 
59  param->lut_clean = 1;
60 }
61 
62 static void apply_lut(EQParameters *param, uint8_t *dst, int dst_stride,
63  const uint8_t *src, int src_stride, int w, int h)
64 {
65  int x, y;
66 
67  if (!param->lut_clean)
68  create_lut(param);
69 
70  for (y = 0; y < h; y++) {
71  for (x = 0; x < w; x++) {
72  dst[y * dst_stride + x] = param->lut[src[y * src_stride + x]];
73  }
74  }
75 }
76 
77 static void process_c(EQParameters *param, uint8_t *dst, int dst_stride,
78  const uint8_t *src, int src_stride, int w, int h)
79 {
80  int x, y, pel;
81 
82  int contrast = (int) (param->contrast * 256 * 16);
83  int brightness = ((int) (100.0 * param->brightness + 100.0) * 511) / 200 - 128 - contrast / 32;
84 
85  for (y = 0; y < h; y++) {
86  for (x = 0; x < w; x++) {
87  pel = ((src[y * src_stride + x] * contrast) >> 12) + brightness;
88 
89  if (pel & ~255)
90  pel = (-pel) >> 31;
91 
92  dst[y * dst_stride + x] = pel;
93  }
94  }
95 }
96 
97 static void check_values(EQParameters *param, EQContext *eq)
98 {
99  if (param->contrast == 1.0 && param->brightness == 0.0 && param->gamma == 1.0)
100  param->adjust = NULL;
101  else if (param->gamma == 1.0 && fabs(param->contrast) < 7.9)
102  param->adjust = eq->process;
103  else
104  param->adjust = apply_lut;
105 }
106 
107 static void set_contrast(EQContext *eq)
108 {
109  eq->contrast = av_clipf(av_expr_eval(eq->contrast_pexpr, eq->var_values, eq), -1000.0, 1000.0);
110  eq->param[0].contrast = eq->contrast;
111  eq->param[0].lut_clean = 0;
112  check_values(&eq->param[0], eq);
113 }
114 
116 {
117  eq->brightness = av_clipf(av_expr_eval(eq->brightness_pexpr, eq->var_values, eq), -1.0, 1.0);
118  eq->param[0].brightness = eq->brightness;
119  eq->param[0].lut_clean = 0;
120  check_values(&eq->param[0], eq);
121 }
122 
123 static void set_gamma(EQContext *eq)
124 {
125  int i;
126 
127  eq->gamma = av_clipf(av_expr_eval(eq->gamma_pexpr, eq->var_values, eq), 0.1, 10.0);
128  eq->gamma_r = av_clipf(av_expr_eval(eq->gamma_r_pexpr, eq->var_values, eq), 0.1, 10.0);
129  eq->gamma_g = av_clipf(av_expr_eval(eq->gamma_g_pexpr, eq->var_values, eq), 0.1, 10.0);
130  eq->gamma_b = av_clipf(av_expr_eval(eq->gamma_b_pexpr, eq->var_values, eq), 0.1, 10.0);
131  eq->gamma_weight = av_clipf(av_expr_eval(eq->gamma_weight_pexpr, eq->var_values, eq), 0.0, 1.0);
132 
133  eq->param[0].gamma = eq->gamma * eq->gamma_g;
134  eq->param[1].gamma = sqrt(eq->gamma_b / eq->gamma_g);
135  eq->param[2].gamma = sqrt(eq->gamma_r / eq->gamma_g);
136 
137  for (i = 0; i < 3; i++) {
138  eq->param[i].gamma_weight = eq->gamma_weight;
139  eq->param[i].lut_clean = 0;
140  check_values(&eq->param[i], eq);
141  }
142 }
143 
145 {
146  int i;
147 
148  eq->saturation = av_clipf(av_expr_eval(eq->saturation_pexpr, eq->var_values, eq), 0.0, 3.0);
149 
150  for (i = 1; i < 3; i++) {
151  eq->param[i].contrast = eq->saturation;
152  eq->param[i].lut_clean = 0;
153  check_values(&eq->param[i], eq);
154  }
155 }
156 
157 static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
158 {
159  int ret;
160  AVExpr *old = NULL;
161 
162  if (*pexpr)
163  old = *pexpr;
164  ret = av_expr_parse(pexpr, expr, var_names, NULL, NULL, NULL, NULL, 0, log_ctx);
165  if (ret < 0) {
166  av_log(log_ctx, AV_LOG_ERROR,
167  "Error when parsing the expression '%s' for %s\n",
168  expr, option);
169  *pexpr = old;
170  return ret;
171  }
172 
173  av_expr_free(old);
174  return 0;
175 }
176 
178 {
179  eq->process = process_c;
180  if (ARCH_X86)
182 }
183 
185 {
186  EQContext *eq = ctx->priv;
187  int ret;
188  ff_eq_init(eq);
189 
190  if ((ret = set_expr(&eq->contrast_pexpr, eq->contrast_expr, "contrast", ctx)) < 0 ||
191  (ret = set_expr(&eq->brightness_pexpr, eq->brightness_expr, "brightness", ctx)) < 0 ||
192  (ret = set_expr(&eq->saturation_pexpr, eq->saturation_expr, "saturation", ctx)) < 0 ||
193  (ret = set_expr(&eq->gamma_pexpr, eq->gamma_expr, "gamma", ctx)) < 0 ||
194  (ret = set_expr(&eq->gamma_r_pexpr, eq->gamma_r_expr, "gamma_r", ctx)) < 0 ||
195  (ret = set_expr(&eq->gamma_g_pexpr, eq->gamma_g_expr, "gamma_g", ctx)) < 0 ||
196  (ret = set_expr(&eq->gamma_b_pexpr, eq->gamma_b_expr, "gamma_b", ctx)) < 0 ||
197  (ret = set_expr(&eq->gamma_weight_pexpr, eq->gamma_weight_expr, "gamma_weight", ctx)) < 0 )
198  return ret;
199 
200  if (eq->eval_mode == EVAL_MODE_INIT) {
201  set_gamma(eq);
202  set_contrast(eq);
205  }
206 
207  return 0;
208 }
209 
211 {
212  EQContext *eq = ctx->priv;
213 
214  av_expr_free(eq->contrast_pexpr); eq->contrast_pexpr = NULL;
215  av_expr_free(eq->brightness_pexpr); eq->brightness_pexpr = NULL;
216  av_expr_free(eq->saturation_pexpr); eq->saturation_pexpr = NULL;
217  av_expr_free(eq->gamma_pexpr); eq->gamma_pexpr = NULL;
218  av_expr_free(eq->gamma_weight_pexpr); eq->gamma_weight_pexpr = NULL;
219  av_expr_free(eq->gamma_r_pexpr); eq->gamma_r_pexpr = NULL;
220  av_expr_free(eq->gamma_g_pexpr); eq->gamma_g_pexpr = NULL;
221  av_expr_free(eq->gamma_b_pexpr); eq->gamma_b_pexpr = NULL;
222 }
223 
225 {
226  EQContext *eq = inlink->dst->priv;
227 
228  eq->var_values[VAR_N] = 0;
229  eq->var_values[VAR_R] = inlink->frame_rate.num == 0 || inlink->frame_rate.den == 0 ?
230  NAN : av_q2d(inlink->frame_rate);
231 
232  return 0;
233 }
234 
236 {
237  static const enum AVPixelFormat pixel_fmts_eq[] = {
245  };
246  AVFilterFormats *fmts_list = ff_make_format_list(pixel_fmts_eq);
247  if (!fmts_list)
248  return AVERROR(ENOMEM);
249  return ff_set_common_formats(ctx, fmts_list);
250 }
251 
253 {
254  AVFilterContext *ctx = inlink->dst;
255  AVFilterLink *outlink = inlink->dst->outputs[0];
256  EQContext *eq = ctx->priv;
257  AVFrame *out;
258  int64_t pos = in->pkt_pos;
259  const AVPixFmtDescriptor *desc;
260  int i;
261 
262  out = ff_get_video_buffer(outlink, inlink->w, inlink->h);
263  if (!out) {
264  av_frame_free(&in);
265  return AVERROR(ENOMEM);
266  }
267 
269  desc = av_pix_fmt_desc_get(inlink->format);
270 
271  eq->var_values[VAR_N] = inlink->frame_count_out;
272  eq->var_values[VAR_POS] = pos == -1 ? NAN : pos;
273  eq->var_values[VAR_T] = TS2T(in->pts, inlink->time_base);
274 
275  if (eq->eval_mode == EVAL_MODE_FRAME) {
276  set_gamma(eq);
277  set_contrast(eq);
280  }
281 
282  for (i = 0; i < desc->nb_components; i++) {
283  int w = inlink->w;
284  int h = inlink->h;
285 
286  if (i == 1 || i == 2) {
287  w = AV_CEIL_RSHIFT(w, desc->log2_chroma_w);
288  h = AV_CEIL_RSHIFT(h, desc->log2_chroma_h);
289  }
290 
291  if (eq->param[i].adjust)
292  eq->param[i].adjust(&eq->param[i], out->data[i], out->linesize[i],
293  in->data[i], in->linesize[i], w, h);
294  else
295  av_image_copy_plane(out->data[i], out->linesize[i],
296  in->data[i], in->linesize[i], w, h);
297  }
298 
299  av_frame_free(&in);
300  return ff_filter_frame(outlink, out);
301 }
302 
303 static inline int set_param(AVExpr **pexpr, const char *args, const char *cmd,
304  void (*set_fn)(EQContext *eq), AVFilterContext *ctx)
305 {
306  EQContext *eq = ctx->priv;
307  int ret;
308  if ((ret = set_expr(pexpr, args, cmd, ctx)) < 0)
309  return ret;
310  if (eq->eval_mode == EVAL_MODE_INIT)
311  set_fn(eq);
312  return 0;
313 }
314 
315 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
316  char *res, int res_len, int flags)
317 {
318  EQContext *eq = ctx->priv;
319 
320 #define SET_PARAM(param_name, set_fn_name) \
321  if (!strcmp(cmd, #param_name)) return set_param(&eq->param_name##_pexpr, args, cmd, set_##set_fn_name, ctx);
322 
323  SET_PARAM(contrast, contrast)
324  else SET_PARAM(brightness, brightness)
325  else SET_PARAM(saturation, saturation)
326  else SET_PARAM(gamma, gamma)
327  else SET_PARAM(gamma_r, gamma)
328  else SET_PARAM(gamma_g, gamma)
329  else SET_PARAM(gamma_b, gamma)
330  else SET_PARAM(gamma_weight, gamma)
331  else return AVERROR(ENOSYS);
332 }
333 
334 static const AVFilterPad eq_inputs[] = {
335  {
336  .name = "default",
337  .type = AVMEDIA_TYPE_VIDEO,
338  .filter_frame = filter_frame,
339  .config_props = config_props,
340  },
341  { NULL }
342 };
343 
344 static const AVFilterPad eq_outputs[] = {
345  {
346  .name = "default",
347  .type = AVMEDIA_TYPE_VIDEO,
348  },
349  { NULL }
350 };
351 
352 #define OFFSET(x) offsetof(EQContext, x)
353 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
354 #define TFLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
355 static const AVOption eq_options[] = {
356  { "contrast", "set the contrast adjustment, negative values give a negative image",
357  OFFSET(contrast_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
358  { "brightness", "set the brightness adjustment",
359  OFFSET(brightness_expr), AV_OPT_TYPE_STRING, {.str = "0.0"}, 0, 0, TFLAGS },
360  { "saturation", "set the saturation adjustment",
361  OFFSET(saturation_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
362  { "gamma", "set the initial gamma value",
363  OFFSET(gamma_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
364  { "gamma_r", "gamma value for red",
365  OFFSET(gamma_r_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
366  { "gamma_g", "gamma value for green",
367  OFFSET(gamma_g_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
368  { "gamma_b", "gamma value for blue",
369  OFFSET(gamma_b_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
370  { "gamma_weight", "set the gamma weight which reduces the effect of gamma on bright areas",
371  OFFSET(gamma_weight_expr), AV_OPT_TYPE_STRING, {.str = "1.0"}, 0, 0, TFLAGS },
372  { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
373  { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
374  { "frame", "eval expressions per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
375  { NULL }
376 };
377 
379 
381  .name = "eq",
382  .description = NULL_IF_CONFIG_SMALL("Adjust brightness, contrast, gamma, and saturation."),
383  .priv_size = sizeof(EQContext),
384  .priv_class = &eq_class,
385  .inputs = eq_inputs,
386  .outputs = eq_outputs,
389  .init = initialize,
390  .uninit = uninit,
392 };
EQParameters::gamma_weight
double gamma_weight
Definition: vf_eq.h:53
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:97
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
EQParameters::gamma
double gamma
Definition: vf_eq.h:53
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:286
out
FILE * out
Definition: movenc.c:54
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:978
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2540
var_names
static const char *const var_names[]
Definition: noise_bsf.c:31
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_eq.c:235
set_saturation
static void set_saturation(EQContext *eq)
Definition: vf_eq.c:144
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:112
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
pixdesc.h
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:396
w
uint8_t w
Definition: llviddspenc.c:38
AVOption
AVOption.
Definition: opt.h:247
initialize
static int initialize(AVFilterContext *ctx)
Definition: vf_eq.c:184
apply_lut
static void apply_lut(EQParameters *param, uint8_t *dst, int dst_stride, const uint8_t *src, int src_stride, int w, int h)
Definition: vf_eq.c:62
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:149
set_expr
static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
Definition: vf_eq.c:157
eq_inputs
static const AVFilterPad eq_inputs[]
Definition: vf_eq.c:334
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
av_image_copy_plane
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:374
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
av_expr_parse
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:685
eq_outputs
static const AVFilterPad eq_outputs[]
Definition: vf_eq.c:344
VAR_T
@ VAR_T
Definition: aeval.c:50
OFFSET
#define OFFSET(x)
Definition: vf_eq.c:352
process_c
static void process_c(EQParameters *param, uint8_t *dst, int dst_stride, const uint8_t *src, int src_stride, int w, int h)
Definition: vf_eq.c:77
av_expr_free
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:336
set_brightness
static void set_brightness(EQContext *eq)
Definition: vf_eq.c:115
eq
#define eq(A, B)
Definition: vf_xbr.c:90
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
config_props
static int config_props(AVFilterLink *inlink)
Definition: vf_eq.c:224
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(eq)
TS2T
#define TS2T(ts, tb)
Definition: internal.h:209
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
inputs
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Definition: filter_design.txt:243
ff_set_common_formats
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:580
ff_vf_eq
const AVFilter ff_vf_eq
Definition: vf_eq.c:380
VAR_R
@ VAR_R
Definition: vf_eq.h:42
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:51
g
const char * g
Definition: vf_curves.c:117
AVFrame::pkt_pos
int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
Definition: frame.h:557
EQParameters
Definition: vf_eq.h:47
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
vf_eq.h
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
ctx
AVFormatContext * ctx
Definition: movenc.c:48
av_expr_eval
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:766
AVExpr
Definition: eval.c:157
FLAGS
#define FLAGS
Definition: vf_eq.c:353
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_eq.c:315
NAN
#define NAN
Definition: mathematics.h:64
option
option
Definition: libkvazaar.c:306
fabs
static __device__ float fabs(float a)
Definition: cuda_runtime.h:182
NULL
#define NULL
Definition: coverity.c:32
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:537
ff_eq_init_x86
void ff_eq_init_x86(EQContext *eq)
Definition: vf_eq_init.c:64
eq_options
static const AVOption eq_options[]
Definition: vf_eq.c:355
av_clipf
#define av_clipf
Definition: common.h:144
src
#define src
Definition: vp8dsp.c:255
VAR_POS
@ VAR_POS
Definition: noise_bsf.c:56
check_values
static void check_values(EQParameters *param, EQContext *eq)
Definition: vf_eq.c:97
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:116
VAR_N
@ VAR_N
Definition: noise_bsf.c:48
set_contrast
static void set_contrast(EQContext *eq)
Definition: vf_eq.c:107
EQContext
Definition: vf_eq.h:58
ff_eq_init
void ff_eq_init(EQContext *eq)
Definition: vf_eq.c:177
EQParameters::contrast
double contrast
Definition: vf_eq.h:53
set_param
static int set_param(AVExpr **pexpr, const char *args, const char *cmd, void(*set_fn)(EQContext *eq), AVFilterContext *ctx)
Definition: vf_eq.c:303
internal.h
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#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:126
i
int i
Definition: input.c:406
common.h
EQParameters::adjust
void(* adjust)(struct EQParameters *eq, uint8_t *dst, int dst_stride, const uint8_t *src, int src_stride, int w, int h)
Definition: vf_eq.h:48
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_eq.c:252
AVFilter
Filter definition.
Definition: avfilter.h:145
TFLAGS
#define TFLAGS
Definition: vf_eq.c:354
ret
ret
Definition: filter_design.txt:187
EQParameters::brightness
double brightness
Definition: vf_eq.h:53
EQParameters::lut
uint8_t lut[256]
Definition: vf_eq.h:51
pos
unsigned int pos
Definition: spdifenc.c:412
create_lut
static void create_lut(EQParameters *param)
Definition: vf_eq.c:37
EVAL_MODE_NB
@ EVAL_MODE_NB
Definition: af_volume.h:42
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_eq.c:210
EVAL_MODE_FRAME
@ EVAL_MODE_FRAME
Definition: af_volume.h:41
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
AVFilterContext
An instance of a filter.
Definition: avfilter.h:333
desc
const char * desc
Definition: libsvtav1.c:79
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
EQParameters::lut_clean
int lut_clean
Definition: vf_eq.h:54
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
EVAL_MODE_INIT
@ EVAL_MODE_INIT
Definition: vf_fftfilt.c:38
AV_PIX_FMT_YUV411P
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:334
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
h
h
Definition: vp9dsp_template.c:2038
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:228
set_gamma
static void set_gamma(EQContext *eq)
Definition: vf_eq.c:123
int
int
Definition: ffmpeg_filter.c:156
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:233
SET_PARAM
#define SET_PARAM(param_name, set_fn_name)