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vf_colorbalance.c
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1 /*
2  * Copyright (c) 2013 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 "libavutil/opt.h"
22 #include "libavutil/pixdesc.h"
23 #include "avfilter.h"
24 #include "drawutils.h"
25 #include "formats.h"
26 #include "internal.h"
27 #include "video.h"
28 
29 #define R 0
30 #define G 1
31 #define B 2
32 #define A 3
33 
34 typedef struct {
35  double shadows;
36  double midtones;
37  double highlights;
38 } Range;
39 
40 typedef struct {
41  const AVClass *class;
45 
46  uint8_t lut[3][256];
47 
48  uint8_t rgba_map[4];
49  int step;
51 
52 #define OFFSET(x) offsetof(ColorBalanceContext, x)
53 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
54 static const AVOption colorbalance_options[] = {
55  { "rs", "set red shadows", OFFSET(cyan_red.shadows), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
56  { "gs", "set green shadows", OFFSET(magenta_green.shadows), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
57  { "bs", "set blue shadows", OFFSET(yellow_blue.shadows), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
58  { "rm", "set red midtones", OFFSET(cyan_red.midtones), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
59  { "gm", "set green midtones", OFFSET(magenta_green.midtones), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
60  { "bm", "set blue midtones", OFFSET(yellow_blue.midtones), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
61  { "rh", "set red highlights", OFFSET(cyan_red.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
62  { "gh", "set green highlights", OFFSET(magenta_green.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
63  { "bh", "set blue highlights", OFFSET(yellow_blue.highlights), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, FLAGS },
64  { NULL }
65 };
66 
67 AVFILTER_DEFINE_CLASS(colorbalance);
68 
70 {
71  static const enum AVPixelFormat pix_fmts[] = {
78  };
79  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
80  if (!fmts_list)
81  return AVERROR(ENOMEM);
82  return ff_set_common_formats(ctx, fmts_list);
83 }
84 
85 static int config_output(AVFilterLink *outlink)
86 {
87  AVFilterContext *ctx = outlink->src;
88  ColorBalanceContext *s = ctx->priv;
89  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
90  double *shadows, *midtones, *highlights, *buffer;
91  int i, r, g, b;
92 
93  buffer = av_malloc(256 * 3 * sizeof(*buffer));
94  if (!buffer)
95  return AVERROR(ENOMEM);
96 
97  shadows = buffer + 256 * 0;
98  midtones = buffer + 256 * 1;
99  highlights = buffer + 256 * 2;
100 
101  for (i = 0; i < 256; i++) {
102  double low = av_clipd((i - 85.0) / -64.0 + 0.5, 0, 1) * 178.5;
103  double mid = av_clipd((i - 85.0) / 64.0 + 0.5, 0, 1) *
104  av_clipd((i + 85.0 - 255.0) / -64.0 + 0.5, 0, 1) * 178.5;
105 
106  shadows[i] = low;
107  midtones[i] = mid;
108  highlights[255 - i] = low;
109  }
110 
111  for (i = 0; i < 256; i++) {
112  r = g = b = i;
113 
114  r = av_clip_uint8(r + s->cyan_red.shadows * shadows[r]);
115  r = av_clip_uint8(r + s->cyan_red.midtones * midtones[r]);
116  r = av_clip_uint8(r + s->cyan_red.highlights * highlights[r]);
117 
118  g = av_clip_uint8(g + s->magenta_green.shadows * shadows[g]);
119  g = av_clip_uint8(g + s->magenta_green.midtones * midtones[g]);
120  g = av_clip_uint8(g + s->magenta_green.highlights * highlights[g]);
121 
122  b = av_clip_uint8(b + s->yellow_blue.shadows * shadows[b]);
123  b = av_clip_uint8(b + s->yellow_blue.midtones * midtones[b]);
124  b = av_clip_uint8(b + s->yellow_blue.highlights * highlights[b]);
125 
126  s->lut[R][i] = r;
127  s->lut[G][i] = g;
128  s->lut[B][i] = b;
129  }
130 
131  av_free(buffer);
132 
133  ff_fill_rgba_map(s->rgba_map, outlink->format);
134  s->step = av_get_padded_bits_per_pixel(desc) >> 3;
135 
136  return 0;
137 }
138 
139 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
140 {
141  AVFilterContext *ctx = inlink->dst;
142  ColorBalanceContext *s = ctx->priv;
143  AVFilterLink *outlink = ctx->outputs[0];
144  const uint8_t roffset = s->rgba_map[R];
145  const uint8_t goffset = s->rgba_map[G];
146  const uint8_t boffset = s->rgba_map[B];
147  const uint8_t aoffset = s->rgba_map[A];
148  const int step = s->step;
149  const uint8_t *srcrow = in->data[0];
150  uint8_t *dstrow;
151  AVFrame *out;
152  int i, j;
153 
154  if (av_frame_is_writable(in)) {
155  out = in;
156  } else {
157  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
158  if (!out) {
159  av_frame_free(&in);
160  return AVERROR(ENOMEM);
161  }
162  av_frame_copy_props(out, in);
163  }
164 
165  dstrow = out->data[0];
166  for (i = 0; i < outlink->h; i++) {
167  const uint8_t *src = srcrow;
168  uint8_t *dst = dstrow;
169 
170  for (j = 0; j < outlink->w * step; j += step) {
171  dst[j + roffset] = s->lut[R][src[j + roffset]];
172  dst[j + goffset] = s->lut[G][src[j + goffset]];
173  dst[j + boffset] = s->lut[B][src[j + boffset]];
174  if (in != out && step == 4)
175  dst[j + aoffset] = src[j + aoffset];
176  }
177 
178  srcrow += in->linesize[0];
179  dstrow += out->linesize[0];
180  }
181 
182  if (in != out)
183  av_frame_free(&in);
184  return ff_filter_frame(ctx->outputs[0], out);
185 }
186 
188  {
189  .name = "default",
190  .type = AVMEDIA_TYPE_VIDEO,
191  .filter_frame = filter_frame,
192  },
193  { NULL }
194 };
195 
197  {
198  .name = "default",
199  .type = AVMEDIA_TYPE_VIDEO,
200  .config_props = config_output,
201  },
202  { NULL }
203 };
204 
206  .name = "colorbalance",
207  .description = NULL_IF_CONFIG_SMALL("Adjust the color balance."),
208  .priv_size = sizeof(ColorBalanceContext),
209  .priv_class = &colorbalance_class,
211  .inputs = colorbalance_inputs,
212  .outputs = colorbalance_outputs,
214 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
static const AVFilterPad colorbalance_inputs[]
#define A
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2157
This structure describes decoded (raw) audio or video data.
Definition: frame.h:181
AVOption.
Definition: opt.h:245
AVFormatContext * ctx
Definition: movenc-test.c:48
static const AVFilterPad colorbalance_outputs[]
Main libavfilter public API header.
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:65
const char * g
Definition: vf_curves.c:108
const char * b
Definition: vf_curves.c:109
packed BGR 8:8:8, 32bpp, XBGRXBGR... X=unused/undefined
Definition: pixfmt.h:247
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:76
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
#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:122
const char * name
Pad name.
Definition: internal.h:59
static int query_formats(AVFilterContext *ctx)
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1163
uint8_t
#define av_malloc(s)
packed RGB 8:8:8, 32bpp, RGBXRGBX... X=unused/undefined
Definition: pixfmt.h:246
static int config_output(AVFilterLink *outlink)
AVOptions.
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:96
double shadows
A filter pad used for either input or output.
Definition: internal.h:53
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 AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:154
AVFILTER_DEFINE_CLASS(colorbalance)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:97
const char * r
Definition: vf_curves.c:107
void * priv
private data for use by the filter
Definition: avfilter.h:319
int av_get_padded_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel for the pixel format described by pixdesc, including any padding ...
Definition: pixdesc.c:2122
double highlights
#define B
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:94
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:95
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:66
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:385
#define src
Definition: vp9dsp.c:530
#define R
int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
Definition: drawutils.c:34
FILE * out
Definition: movenc-test.c:54
#define G
uint8_t lut[3][256]
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:375
misc drawing utilities
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:505
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:209
AVFilter ff_vf_colorbalance
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
double midtones
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
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:141
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:248
const char * name
Filter name.
Definition: avfilter.h:145
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:316
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:192
#define OFFSET(x)
#define av_free(p)
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:304
static const AVOption colorbalance_options[]
internal API functions
#define FLAGS
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:245
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:565
GLuint buffer
Definition: opengl_enc.c:102