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lavfi: add rgbtestsrc source, ported from MPlayer libmpcodecs 

The licence was changed from GPL to LGPL with explicit approval from
the original author.

See thread:
Subject: [FFmpeg-devel] [PATCH] lavfi: add rgbtestsrc source,
        ported from MPlayer libmpcodecs
Date: Mon, 11 Jul 2011 16:32:41 +0200
This commit is contained in:
Stefano Sabatini 2011-07-11 16:27:09 +02:00
parent 1b8807964c
commit 9dbe8d9e22
5 changed files with 150 additions and 8 deletions
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14
doc/filters.texi
View File

@ -2045,13 +2045,17 @@ Some examples follow:
frei0r_src=200x200:10:partik0l=1234 [overlay]; [in][overlay] overlay
@end example
@section testsrc
@section rgbtestsrc, testsrc
Generate a test video pattern, showing a color pattern, a scrolling
gradient and a timestamp. This is mainly intended for testing
purposes.
The @code{rgbtestsrc} source generates an RGB test pattern useful for
detecting RGB vs BGR issues. You should see a red, green and blue
stripe from top to bottom.
It accepts an optional sequence of @var{key}=@var{value} pairs,
The @code{testsrc} source generates a test video pattern, showing a
color pattern, a scrolling gradient and a timestamp. This is mainly
intended for testing purposes.
Both sources accept an optional sequence of @var{key}=@var{value} pairs,
separated by ":". The description of the accepted options follows.
@table @option

1
libavfilter/Makefile
View File

@ -69,6 +69,7 @@ OBJS-$(CONFIG_COLOR_FILTER) += vsrc_color.o
OBJS-$(CONFIG_FREI0R_SRC_FILTER) += vf_frei0r.o
OBJS-$(CONFIG_MOVIE_FILTER) += vsrc_movie.o
OBJS-$(CONFIG_NULLSRC_FILTER) += vsrc_nullsrc.o
OBJS-$(CONFIG_RGBTESTSRC_FILTER) += vsrc_testsrc.o
OBJS-$(CONFIG_TESTSRC_FILTER) += vsrc_testsrc.o
OBJS-$(CONFIG_BUFFERSINK_FILTER) += vsink_buffer.o

1
libavfilter/allfilters.c
View File

@ -85,6 +85,7 @@ void avfilter_register_all(void)
REGISTER_FILTER (FREI0R, frei0r_src, vsrc);
REGISTER_FILTER (MOVIE, movie, vsrc);
REGISTER_FILTER (NULLSRC, nullsrc, vsrc);
REGISTER_FILTER (RGBTESTSRC, rgbtestsrc, vsrc);
REGISTER_FILTER (TESTSRC, testsrc, vsrc);
REGISTER_FILTER (BUFFER, buffersink, vsink);

4
libavfilter/avfilter.h
View File

@ -29,8 +29,8 @@
#include "libavutil/rational.h"
#define LIBAVFILTER_VERSION_MAJOR 2
#define LIBAVFILTER_VERSION_MINOR 25
#define LIBAVFILTER_VERSION_MICRO 1
#define LIBAVFILTER_VERSION_MINOR 26
#define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \

138
libavfilter/vsrc_testsrc.c
View File

@ -21,13 +21,19 @@
/**
* @file
* Based on the test pattern generator demuxer by Nicolas George:
* Misc test sources.
*
* testsrc is based on the test pattern generator demuxer by Nicolas George:
* http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2007-October/037845.html
*
* rgbtestsrc is ported from MPlayer libmpcodecs/vf_rgbtest.c by
* Michael Niedermayer.
*/
#include <float.h>
#include "libavutil/opt.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
@ -41,6 +47,9 @@ typedef struct {
char *rate; ///< video frame rate
char *duration; ///< total duration of the generated video
void (* fill_picture_fn)(AVFilterContext *ctx, AVFilterBufferRef *picref);
/* only used by rgbtest */
int rgba_map[4];
} TestSourceContext;
#define OFFSET(x) offsetof(TestSourceContext, x)
@ -350,3 +359,130 @@ AVFilter avfilter_vsrc_testsrc = {
};
#endif /* CONFIG_TESTSRC_FILTER */
#if CONFIG_RGBTESTSRC_FILTER
static const char *rgbtestsrc_get_name(void *ctx)
{
return "rgbtestsrc";
}
static const AVClass rgbtestsrc_class = {
"RGBTestSourceContext",
rgbtestsrc_get_name,
testsrc_options
};
#define R 0
#define G 1
#define B 2
#define A 3
static void rgbtest_put_pixel(uint8_t *dst, int dst_linesize,
int x, int y, int r, int g, int b, enum PixelFormat fmt,
int rgba_map[4])
{
int32_t v;
uint8_t *p;
switch (fmt) {
case PIX_FMT_BGR444: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r >> 4) << 8) | ((g >> 4) << 4) | (b >> 4); break;
case PIX_FMT_RGB444: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b >> 4) << 8) | ((g >> 4) << 4) | (r >> 4); break;
case PIX_FMT_BGR555: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r>>3)<<10) | ((g>>3)<<5) | (b>>3); break;
case PIX_FMT_RGB555: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b>>3)<<10) | ((g>>3)<<5) | (r>>3); break;
case PIX_FMT_BGR565: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r>>3)<<11) | ((g>>2)<<5) | (b>>3); break;
case PIX_FMT_RGB565: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b>>3)<<11) | ((g>>2)<<5) | (r>>3); break;
case PIX_FMT_RGB24:
case PIX_FMT_BGR24:
v = (r << (rgba_map[R]*8)) + (g << (rgba_map[G]*8)) + (b << (rgba_map[B]*8));
p = dst + 3*x + y*dst_linesize;
AV_WL24(p, v);
break;
case PIX_FMT_RGBA:
case PIX_FMT_BGRA:
case PIX_FMT_ARGB:
case PIX_FMT_ABGR:
v = (r << (rgba_map[R]*8)) + (g << (rgba_map[G]*8)) + (b << (rgba_map[B]*8));
p = dst + 4*x + y*dst_linesize;
AV_WL32(p, v);
break;
}
}
static void rgbtest_fill_picture(AVFilterContext *ctx, AVFilterBufferRef *picref)
{
TestSourceContext *test = ctx->priv;
int x, y, w = picref->video->w, h = picref->video->h;
for (y = 0; y < h; y++) {
for (x = 0; x < picref->video->w; x++) {
int c = 256*x/w;
int r = 0, g = 0, b = 0;
if (3*y < h ) r = c;
else if (3*y < 2*h) g = c;
else b = c;
rgbtest_put_pixel(picref->data[0], picref->linesize[0], x, y, r, g, b,
ctx->outputs[0]->format, test->rgba_map);
}
}
}
static av_cold int rgbtest_init(AVFilterContext *ctx, const char *args, void *opaque)
{
TestSourceContext *test = ctx->priv;
test->class = &rgbtestsrc_class;
test->fill_picture_fn = rgbtest_fill_picture;
return init(ctx, args, opaque);
}
static int rgbtest_query_formats(AVFilterContext *ctx)
{
static const enum PixelFormat pix_fmts[] = {
PIX_FMT_RGBA, PIX_FMT_ARGB, PIX_FMT_BGRA, PIX_FMT_ABGR,
PIX_FMT_BGR24, PIX_FMT_RGB24,
PIX_FMT_RGB444, PIX_FMT_BGR444,
PIX_FMT_RGB565, PIX_FMT_BGR565,
PIX_FMT_RGB555, PIX_FMT_BGR555,
PIX_FMT_NONE
};
avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
return 0;
}
static int rgbtest_config_props(AVFilterLink *outlink)
{
TestSourceContext *test = outlink->src->priv;
switch (outlink->format) {
case PIX_FMT_ARGB: test->rgba_map[A] = 0; test->rgba_map[R] = 1; test->rgba_map[G] = 2; test->rgba_map[B] = 3; break;
case PIX_FMT_ABGR: test->rgba_map[A] = 0; test->rgba_map[B] = 1; test->rgba_map[G] = 2; test->rgba_map[R] = 3; break;
case PIX_FMT_RGBA:
case PIX_FMT_RGB24: test->rgba_map[R] = 0; test->rgba_map[G] = 1; test->rgba_map[B] = 2; test->rgba_map[A] = 3; break;
case PIX_FMT_BGRA:
case PIX_FMT_BGR24: test->rgba_map[B] = 0; test->rgba_map[G] = 1; test->rgba_map[R] = 2; test->rgba_map[A] = 3; break;
}
return config_props(outlink);
}
AVFilter avfilter_vsrc_rgbtestsrc = {
.name = "rgbtestsrc",
.description = NULL_IF_CONFIG_SMALL("Generate RGB test pattern."),
.priv_size = sizeof(TestSourceContext),
.init = rgbtest_init,
.query_formats = rgbtest_query_formats,
.inputs = (AVFilterPad[]) {{ .name = NULL}},
.outputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = request_frame,
.config_props = rgbtest_config_props, },
{ .name = NULL }},
};
#endif /* CONFIG_RGBTESTSRC_FILTER */