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/parseutils.h"
40 #include "drawutils.h"
41 
42 typedef struct {
43  int w, h;
47  int line_step[4];
48  int hsub, vsub;
49  uint64_t pts;
50 } ColorContext;
51 
52 static av_cold int color_init(AVFilterContext *ctx, const char *args)
53 {
54  ColorContext *color = ctx->priv;
55  char color_string[128] = "black";
56  char frame_size [128] = "320x240";
57  char frame_rate [128] = "25";
58  AVRational frame_rate_q;
59  int ret;
60 
61  if (args)
62  sscanf(args, "%127[^:]:%127[^:]:%127s", color_string, frame_size, frame_rate);
63 
64  if (av_parse_video_size(&color->w, &color->h, frame_size) < 0) {
65  av_log(ctx, AV_LOG_ERROR, "Invalid frame size: %s\n", frame_size);
66  return AVERROR(EINVAL);
67  }
68 
69  if (av_parse_video_rate(&frame_rate_q, frame_rate) < 0 ||
70  frame_rate_q.den <= 0 || frame_rate_q.num <= 0) {
71  av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", frame_rate);
72  return AVERROR(EINVAL);
73  }
74  color->time_base.num = frame_rate_q.den;
75  color->time_base.den = frame_rate_q.num;
76 
77  if ((ret = av_parse_color(color->color, color_string, -1, ctx)) < 0)
78  return ret;
79 
80  return 0;
81 }
82 
84 {
85  ColorContext *color = ctx->priv;
86  int i;
87 
88  for (i = 0; i < 4; i++) {
89  av_freep(&color->line[i]);
90  color->line_step[i] = 0;
91  }
92 }
93 
95 {
96  static const enum AVPixelFormat pix_fmts[] = {
100 
107 
109  };
110 
112  return 0;
113 }
114 
115 static int color_config_props(AVFilterLink *inlink)
116 {
117  AVFilterContext *ctx = inlink->src;
118  ColorContext *color = ctx->priv;
119  uint8_t rgba_color[4];
120  int is_packed_rgba;
121  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
122 
123  color->hsub = pix_desc->log2_chroma_w;
124  color->vsub = pix_desc->log2_chroma_h;
125 
126  color->w &= ~((1 << color->hsub) - 1);
127  color->h &= ~((1 << color->vsub) - 1);
128  if (av_image_check_size(color->w, color->h, 0, ctx) < 0)
129  return AVERROR(EINVAL);
130 
131  memcpy(rgba_color, color->color, sizeof(rgba_color));
132  ff_fill_line_with_color(color->line, color->line_step, color->w, color->color,
133  inlink->format, rgba_color, &is_packed_rgba, NULL);
134 
135  av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d r:%d/%d color:0x%02x%02x%02x%02x[%s]\n",
136  color->w, color->h, color->time_base.den, color->time_base.num,
137  color->color[0], color->color[1], color->color[2], color->color[3],
138  is_packed_rgba ? "rgba" : "yuva");
139  inlink->w = color->w;
140  inlink->h = color->h;
141  inlink->time_base = color->time_base;
142 
143  return 0;
144 }
145 
147 {
148  ColorContext *color = link->src->priv;
149  AVFilterBufferRef *picref = ff_get_video_buffer(link, AV_PERM_WRITE, color->w, color->h);
150 
151  if (!picref)
152  return AVERROR(ENOMEM);
153 
154  picref->video->pixel_aspect = (AVRational) {1, 1};
155  picref->pts = color->pts++;
156  picref->pos = -1;
157 
158  ff_draw_rectangle(picref->data, picref->linesize,
159  color->line, color->line_step, color->hsub, color->vsub,
160  0, 0, color->w, color->h);
161  return ff_filter_frame(link, picref);
162 }
163 
165  {
166  .name = "default",
167  .type = AVMEDIA_TYPE_VIDEO,
168  .request_frame = color_request_frame,
169  .config_props = color_config_props
170  },
171  { NULL }
172 };
173 
175  .name = "color",
176  .description = NULL_IF_CONFIG_SMALL("Provide an uniformly colored input, syntax is: [color[:size[:rate]]]"),
177 
178  .priv_size = sizeof(ColorContext),
179  .init = color_init,
180  .uninit = color_uninit,
181 
183 
184  .inputs = NULL,
185 
186  .outputs = avfilter_vsrc_color_outputs,
187 };
static void uninit(AVFilterContext *ctx)
Definition: af_amix.c:522
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:1435
int av_parse_video_rate(AVRational *rate, const char *arg)
Parse str and store the detected values in *rate.
Definition: parseutils.c:122
AVFilterBufferRefVideoProps * video
video buffer specific properties
Definition: avfilter.h:159
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:95
static av_cold int color_init(AVFilterContext *ctx, const char *args)
Definition: vsrc_color.c:52
int linesize[8]
number of bytes per line
Definition: avfilter.h:157
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:70
misc image utilities
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:122
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:67
memory handling functions
uint8_t * line[4]
Definition: vsrc_color.c:46
int ff_filter_frame(AVFilterLink *link, AVFilterBufferRef *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:459
int num
numerator
Definition: rational.h:44
Various defines for YUV<->RGB conversion.
int vsub
chroma subsampling values
Definition: vsrc_color.c:48
static const AVFilterPad avfilter_vsrc_color_outputs[]
Definition: vsrc_color.c:164
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:66
static int color_config_props(AVFilterLink *inlink)
Definition: vsrc_color.c:115
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:151
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:44
const char * name
Pad name.
Definition: internal.h:39
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:102
uint8_t
int line_step[4]
Definition: vsrc_color.c:47
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:95
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of PIX_FMT_YUV440P and setting color_range ...
Definition: pixfmt.h:101
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV422P and setting color_...
Definition: pixfmt.h:78
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:375
AVRational pixel_aspect
pixel aspect ratio
Definition: avfilter.h:124
static int init(AVCodecParserContext *s)
Definition: h264_parser.c:335
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:300
int64_t pts
presentation timestamp.
Definition: avfilter.h:167
A filter pad used for either input or output.
Definition: internal.h:33
uint64_t pts
Definition: vsrc_color.c:49
static const uint8_t frame_size[4]
Definition: g723_1_data.h:47
static int query_formats(AVFilterContext *ctx)
Definition: vsrc_color.c:94
AVFilterBufferRef * ff_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:145
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:75
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:88
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:96
void * priv
private data for use by the filter
Definition: avfilter.h:439
Definition: graph2dot.c:48
static av_cold void color_uninit(AVFilterContext *ctx)
Definition: vsrc_color.c:83
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:146
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:93
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:94
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:69
common internal API header
struct AVRational AVRational
rational number numerator/denominator
AVRational time_base
Definition: vsrc_color.c:45
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:220
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV420P and setting color_...
Definition: pixfmt.h:77
AVFilter avfilter_vsrc_color
Definition: vsrc_color.c:174
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:68
A reference to an AVFilterBuffer.
Definition: avfilter.h:139
NULL
Definition: eval.c:52
misc drawing utilities
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:55
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:71
Filter definition.
Definition: avfilter.h:371
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:110
rational number numerator/denominator
Definition: rational.h:43
const char * name
filter name
Definition: avfilter.h:372
misc parsing utilities
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV444P and setting color_...
Definition: pixfmt.h:79
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:72
int den
denominator
Definition: rational.h:45
static const uint8_t color[]
Definition: log.c:52
#define AV_PERM_WRITE
can write to the buffer
Definition: avfilter.h:98
int64_t pos
byte position in stream, -1 if unknown
Definition: avfilter.h:168
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
uint8_t * data[8]
picture/audio data for each plane
Definition: avfilter.h:141
An instance of a filter.
Definition: avfilter.h:418
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:100
internal API functions
static int color_request_frame(AVFilterLink *link)
Definition: vsrc_color.c:146
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:63