Libav
vsrc_color.c
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1 /*
2  * Copyright (c) 2010 Stefano Sabatini
3  *
4  * This file is part of Libav.
5  *
6  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
26 #include <stdio.h>
27 #include <string.h>
28 
29 #include "avfilter.h"
30 #include "formats.h"
31 #include "internal.h"
32 #include "video.h"
33 #include "libavutil/pixdesc.h"
34 #include "libavutil/colorspace.h"
35 #include "libavutil/imgutils.h"
36 #include "libavutil/internal.h"
37 #include "libavutil/mathematics.h"
38 #include "libavutil/mem.h"
39 #include "libavutil/opt.h"
40 #include "libavutil/parseutils.h"
41 #include "drawutils.h"
42 
43 typedef struct ColorContext {
44  const AVClass *class;
45  int w, h;
49  int line_step[4];
50  int hsub, vsub;
51  uint64_t pts;
52  char *color_str;
53  char *size_str;
55 } ColorContext;
56 
58 {
59  ColorContext *color = ctx->priv;
60  int ret;
61 
62  if (av_parse_video_size(&color->w, &color->h, color->size_str) < 0) {
63  av_log(ctx, AV_LOG_ERROR, "Invalid frame size: %s\n", color->size_str);
64  return AVERROR(EINVAL);
65  }
66 
67  if (av_parse_video_rate(&color->frame_rate, color->framerate_str) < 0) {
68  av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", color->framerate_str);
69  return AVERROR(EINVAL);
70  }
71 
72  if ((ret = av_parse_color(color->color, color->color_str, -1, ctx)) < 0)
73  return ret;
74 
75  return 0;
76 }
77 
79 {
80  ColorContext *color = ctx->priv;
81  int i;
82 
83  for (i = 0; i < 4; i++) {
84  av_freep(&color->line[i]);
85  color->line_step[i] = 0;
86  }
87 }
88 
90 {
91  static const enum AVPixelFormat pix_fmts[] = {
95 
102 
104  };
105 
107  return 0;
108 }
109 
110 static int color_config_props(AVFilterLink *inlink)
111 {
112  AVFilterContext *ctx = inlink->src;
113  ColorContext *color = ctx->priv;
114  uint8_t rgba_color[4];
115  int is_packed_rgba;
116  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
117 
118  color->hsub = pix_desc->log2_chroma_w;
119  color->vsub = pix_desc->log2_chroma_h;
120 
121  color->w &= ~((1 << color->hsub) - 1);
122  color->h &= ~((1 << color->vsub) - 1);
123  if (av_image_check_size(color->w, color->h, 0, ctx) < 0)
124  return AVERROR(EINVAL);
125 
126  memcpy(rgba_color, color->color, sizeof(rgba_color));
127  ff_fill_line_with_color(color->line, color->line_step, color->w, color->color,
128  inlink->format, rgba_color, &is_packed_rgba, NULL);
129 
130  av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d r:%d/%d color:0x%02x%02x%02x%02x[%s]\n",
131  color->w, color->h, color->frame_rate.num, color->frame_rate.den,
132  color->color[0], color->color[1], color->color[2], color->color[3],
133  is_packed_rgba ? "rgba" : "yuva");
134  inlink->w = color->w;
135  inlink->h = color->h;
136  inlink->time_base = av_inv_q(color->frame_rate);
137  inlink->frame_rate = color->frame_rate;
138 
139  return 0;
140 }
141 
143 {
144  ColorContext *color = link->src->priv;
145  AVFrame *frame = ff_get_video_buffer(link, color->w, color->h);
146 
147  if (!frame)
148  return AVERROR(ENOMEM);
149 
150  frame->sample_aspect_ratio = (AVRational) {1, 1};
151  frame->pts = color->pts++;
152 
153  ff_draw_rectangle(frame->data, frame->linesize,
154  color->line, color->line_step, color->hsub, color->vsub,
155  0, 0, color->w, color->h);
156  return ff_filter_frame(link, frame);
157 }
158 
159 #define OFFSET(x) offsetof(ColorContext, x)
160 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM
161 static const AVOption options[] = {
162  { "color", "Output video color", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, .flags = FLAGS },
163  { "size", "Output video size (wxh or an abbreviation)", OFFSET(size_str), AV_OPT_TYPE_STRING, { .str = "320x240" }, .flags = FLAGS },
164  { "framerate", "Output video framerate", OFFSET(framerate_str), AV_OPT_TYPE_STRING, { .str = "25" }, .flags = FLAGS },
165  { NULL },
166 };
167 
168 static const AVClass color_class = {
169  .class_name = "color",
170  .item_name = av_default_item_name,
171  .option = options,
172  .version = LIBAVUTIL_VERSION_INT,
173 };
174 
176  {
177  .name = "default",
178  .type = AVMEDIA_TYPE_VIDEO,
179  .request_frame = color_request_frame,
180  .config_props = color_config_props
181  },
182  { NULL }
183 };
184 
186  .name = "color",
187  .description = NULL_IF_CONFIG_SMALL("Provide an uniformly colored input, syntax is: [color[:size[:rate]]]"),
188 
189  .priv_class = &color_class,
190  .priv_size = sizeof(ColorContext),
191  .init = color_init,
192  .uninit = color_uninit,
193 
195 
196  .inputs = NULL,
197 
198  .outputs = avfilter_vsrc_color_outputs,
199 };
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:1768
This structure describes decoded (raw) audio or video data.
Definition: frame.h:140
int av_parse_video_rate(AVRational *rate, const char *arg)
Parse str and store the detected values in *rate.
Definition: parseutils.c:127
AVOption.
Definition: opt.h:234
int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str)
Parse str and put in width_ptr and height_ptr the detected values.
Definition: parseutils.c:100
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:64
misc image utilities
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:259
Main libavfilter public API header.
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:61
memory handling functions
uint8_t * line[4]
Definition: vsrc_color.c:48
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_amix.c:514
int num
numerator
Definition: rational.h:44
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
Various defines for YUV<->RGB conversion.
int vsub
chroma subsampling values
Definition: vsrc_color.c:50
static const AVFilterPad avfilter_vsrc_color_outputs[]
Definition: vsrc_color.c:175
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:57
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:91
char * color_str
Definition: vsrc_color.c:52
AVFilter ff_vsrc_color
Definition: vsrc_color.c:185
static int color_config_props(AVFilterLink *inlink)
Definition: vsrc_color.c:110
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:202
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:165
uint8_t color[4]
Definition: vsrc_color.c:46
const char * name
Pad name.
Definition: internal.h:41
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:39
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:747
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:98
uint8_t
#define av_cold
Definition: attributes.h:66
AVOptions.
int line_step[4]
Definition: vsrc_color.c:49
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:211
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:91
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:97
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:72
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:140
void 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:389
static av_cold int color_init(AVFilterContext *ctx)
Definition: vsrc_color.c:57
int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen, void *log_ctx)
Put the RGBA values that correspond to color_string in rgba_color.
Definition: parseutils.c:305
A filter pad used for either input or output.
Definition: internal.h:35
uint64_t pts
Definition: vsrc_color.c:51
#define FLAGS
Definition: vsrc_color.c:160
static int query_formats(AVFilterContext *ctx)
Definition: vsrc_color.c:89
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:100
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:148
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:92
void * priv
private data for use by the filter
Definition: avfilter.h:277
static const AVClass color_class
Definition: vsrc_color.c:168
Definition: graph2dot.c:48
static av_cold void color_uninit(AVFilterContext *ctx)
Definition: vsrc_color.c:78
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:89
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:90
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:63
common internal API header
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:223
char * size_str
Definition: vsrc_color.c:53
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:71
AVFormatContext * ctx
Definition: movenc.c:48
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:62
LIBAVUTIL_VERSION_INT
Definition: eval.c:55
NULL
Definition: eval.c:55
misc drawing utilities
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:158
av_default_item_name
Definition: dnxhdenc.c:55
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:80
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:206
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:65
Describe the class of an AVClass context structure.
Definition: log.h:34
Filter definition.
Definition: avfilter.h:120
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:248
rational number numerator/denominator
Definition: rational.h:43
const char * name
Filter name.
Definition: avfilter.h:124
misc parsing utilities
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:257
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:122
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:146
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:59
AVRational frame_rate
Definition: vsrc_color.c:47
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:73
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:66
int den
denominator
Definition: rational.h:45
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:582
int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4], enum AVPixelFormat pix_fmt, uint8_t rgba_color[4], int *is_packed_rgba, uint8_t rgba_map_ptr[4])
Definition: drawutils.c:29
An instance of a filter.
Definition: avfilter.h:262
char * framerate_str
Definition: vsrc_color.c:54
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:96
#define OFFSET(x)
Definition: vsrc_color.c:159
internal API functions
static int color_request_frame(AVFilterLink *link)
Definition: vsrc_color.c:142
void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4], uint8_t *src[4], int pixelstep[4], int hsub, int vsub, int x, int y, int w, int h)
Definition: drawutils.c:82
AVPixelFormat
Pixel format.
Definition: pixfmt.h:57
static const AVOption options[]
Definition: vsrc_color.c:161