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FFmpeg/libavfilter/vsrc_testsrc.c
Paul B Mahol bd252ff6fa lavfi/smptebars: fix invalid writes 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
2013-04-04 22:10:42 +00:00

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/*
* Copyright (c) 2007 Nicolas George <nicolas.george@normalesup.org>
* Copyright (c) 2011 Stefano Sabatini
* Copyright (c) 2012 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Misc test sources.
*
* testsrc is based on the test pattern generator demuxer by Nicolas George:
* http://lists.ffmpeg.org/pipermail/ffmpeg-devel/2007-October/037845.html
*
* rgbtestsrc is ported from MPlayer libmpcodecs/vf_rgbtest.c by
* Michael Niedermayer.
*
* smptebars is by Paul B Mahol.
*/
#include <float.h>
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "drawutils.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct {
const AVClass *class;
int w, h;
unsigned int nb_frame;
AVRational time_base, frame_rate;
int64_t pts;
char *duration_str; ///< total duration of the generated video
int64_t duration; ///< duration expressed in microseconds
AVRational sar; ///< sample aspect ratio
int nb_decimals;
int draw_once; ///< draw only the first frame, always put out the same picture
AVFrame *picref; ///< cached reference containing the painted picture
void (* fill_picture_fn)(AVFilterContext *ctx, AVFrame *frame);
/* only used by color */
char *color_str;
FFDrawContext draw;
FFDrawColor color;
uint8_t color_rgba[4];
/* only used by rgbtest */
uint8_t rgba_map[4];
} TestSourceContext;
#define OFFSET(x) offsetof(TestSourceContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption options[] = {
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0, FLAGS },
{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0, FLAGS },
{ "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
{ "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
{ "duration", "set video duration", OFFSET(duration_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
{ "d", "set video duration", OFFSET(duration_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
{ "sar", "set video sample aspect ratio", OFFSET(sar), AV_OPT_TYPE_RATIONAL, {.dbl= 1}, 0, INT_MAX, FLAGS },
/* only used by color */
{ "color", "set color", OFFSET(color_str), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "c", "set color", OFFSET(color_str), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
/* only used by testsrc */
{ "decimals", "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.i64=0}, 0, 17, FLAGS },
{ "n", "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.i64=0}, 0, 17, FLAGS },
{ NULL },
};
static av_cold int init(AVFilterContext *ctx, const char *args)
{
TestSourceContext *test = ctx->priv;
int ret = 0;
av_opt_set_defaults(test);
if ((ret = (av_set_options_string(test, args, "=", ":"))) < 0)
return ret;
test->duration = -1;
if (test->duration_str &&
(ret = av_parse_time(&test->duration, test->duration_str, 1)) < 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid duration: '%s'\n", test->duration_str);
return ret;
}
if (test->nb_decimals && strcmp(ctx->filter->name, "testsrc")) {
av_log(ctx, AV_LOG_WARNING,
"Option 'decimals' is ignored with source '%s'\n",
ctx->filter->name);
}
if (test->color_str) {
if (!strcmp(ctx->filter->name, "color")) {
ret = av_parse_color(test->color_rgba, test->color_str, -1, ctx);
if (ret < 0)
return ret;
} else {
av_log(ctx, AV_LOG_WARNING,
"Option 'color' is ignored with source '%s'\n",
ctx->filter->name);
}
}
test->time_base = av_inv_q(test->frame_rate);
test->nb_frame = 0;
test->pts = 0;
av_log(ctx, AV_LOG_VERBOSE, "size:%dx%d rate:%d/%d duration:%f sar:%d/%d\n",
test->w, test->h, test->frame_rate.num, test->frame_rate.den,
test->duration < 0 ? -1 : (double)test->duration/1000000,
test->sar.num, test->sar.den);
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
TestSourceContext *test = ctx->priv;
av_opt_free(test);
av_frame_free(&test->picref);
}
static int config_props(AVFilterLink *outlink)
{
TestSourceContext *test = outlink->src->priv;
outlink->w = test->w;
outlink->h = test->h;
outlink->sample_aspect_ratio = test->sar;
outlink->frame_rate = test->frame_rate;
outlink->time_base = test->time_base;
return 0;
}
static int request_frame(AVFilterLink *outlink)
{
TestSourceContext *test = outlink->src->priv;
AVFrame *frame;
if (test->duration >= 0 &&
av_rescale_q(test->pts, test->time_base, AV_TIME_BASE_Q) >= test->duration)
return AVERROR_EOF;
if (test->draw_once) {
if (!test->picref) {
test->picref =
ff_get_video_buffer(outlink, test->w, test->h);
if (!test->picref)
return AVERROR(ENOMEM);
test->fill_picture_fn(outlink->src, test->picref);
}
frame = av_frame_clone(test->picref);
} else
frame = ff_get_video_buffer(outlink, test->w, test->h);
if (!frame)
return AVERROR(ENOMEM);
frame->pts = test->pts;
frame->key_frame = 1;
frame->interlaced_frame = 0;
frame->pict_type = AV_PICTURE_TYPE_I;
frame->sample_aspect_ratio = test->sar;
if (!test->draw_once)
test->fill_picture_fn(outlink->src, frame);
test->pts++;
test->nb_frame++;
return ff_filter_frame(outlink, frame);
}
#if CONFIG_COLOR_FILTER
#define color_options options
AVFILTER_DEFINE_CLASS(color);
static void color_fill_picture(AVFilterContext *ctx, AVFrame *picref)
{
TestSourceContext *test = ctx->priv;
ff_fill_rectangle(&test->draw, &test->color,
picref->data, picref->linesize,
0, 0, test->w, test->h);
}
static av_cold int color_init(AVFilterContext *ctx, const char *args)
{
TestSourceContext *test = ctx->priv;
test->class = &color_class;
test->fill_picture_fn = color_fill_picture;
test->draw_once = 1;
av_opt_set(test, "color", "black", 0);
return init(ctx, args);
}
static int color_query_formats(AVFilterContext *ctx)
{
ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
return 0;
}
static int color_config_props(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->src;
TestSourceContext *test = ctx->priv;
int ret;
ff_draw_init(&test->draw, inlink->format, 0);
ff_draw_color(&test->draw, &test->color, test->color_rgba);
test->w = ff_draw_round_to_sub(&test->draw, 0, -1, test->w);
test->h = ff_draw_round_to_sub(&test->draw, 1, -1, test->h);
if (av_image_check_size(test->w, test->h, 0, ctx) < 0)
return AVERROR(EINVAL);
if ((ret = config_props(inlink)) < 0)
return ret;
av_log(ctx, AV_LOG_VERBOSE, "color:0x%02x%02x%02x%02x\n",
test->color_rgba[0], test->color_rgba[1], test->color_rgba[2], test->color_rgba[3]);
return 0;
}
static const AVFilterPad color_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = request_frame,
.config_props = color_config_props,
},
{ NULL }
};
AVFilter avfilter_vsrc_color = {
.name = "color",
.description = NULL_IF_CONFIG_SMALL("Provide an uniformly colored input."),
.priv_size = sizeof(TestSourceContext),
.init = color_init,
.uninit = uninit,
.query_formats = color_query_formats,
.inputs = NULL,
.outputs = color_outputs,
.priv_class = &color_class,
};
#endif /* CONFIG_COLOR_FILTER */
#if CONFIG_NULLSRC_FILTER
#define nullsrc_options options
AVFILTER_DEFINE_CLASS(nullsrc);
static void nullsrc_fill_picture(AVFilterContext *ctx, AVFrame *picref) { }
static av_cold int nullsrc_init(AVFilterContext *ctx, const char *args)
{
TestSourceContext *test = ctx->priv;
test->class = &nullsrc_class;
test->fill_picture_fn = nullsrc_fill_picture;
return init(ctx, args);
}
static const AVFilterPad nullsrc_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = request_frame,
.config_props = config_props,
},
{ NULL },
};
AVFilter avfilter_vsrc_nullsrc = {
.name = "nullsrc",
.description = NULL_IF_CONFIG_SMALL("Null video source, return unprocessed video frames."),
.init = nullsrc_init,
.uninit = uninit,
.priv_size = sizeof(TestSourceContext),
.inputs = NULL,
.outputs = nullsrc_outputs,
.priv_class = &nullsrc_class,
};
#endif /* CONFIG_NULLSRC_FILTER */
#if CONFIG_TESTSRC_FILTER
#define testsrc_options options
AVFILTER_DEFINE_CLASS(testsrc);
/**
* Fill a rectangle with value val.
*
* @param val the RGB value to set
* @param dst pointer to the destination buffer to fill
* @param dst_linesize linesize of destination
* @param segment_width width of the segment
* @param x horizontal coordinate where to draw the rectangle in the destination buffer
* @param y horizontal coordinate where to draw the rectangle in the destination buffer
* @param w width of the rectangle to draw, expressed as a number of segment_width units
* @param h height of the rectangle to draw, expressed as a number of segment_width units
*/
static void draw_rectangle(unsigned val, uint8_t *dst, int dst_linesize, unsigned segment_width,
unsigned x, unsigned y, unsigned w, unsigned h)
{
int i;
int step = 3;
dst += segment_width * (step * x + y * dst_linesize);
w *= segment_width * step;
h *= segment_width;
for (i = 0; i < h; i++) {
memset(dst, val, w);
dst += dst_linesize;
}
}
static void draw_digit(int digit, uint8_t *dst, unsigned dst_linesize,
unsigned segment_width)
{
#define TOP_HBAR 1
#define MID_HBAR 2
#define BOT_HBAR 4
#define LEFT_TOP_VBAR 8
#define LEFT_BOT_VBAR 16
#define RIGHT_TOP_VBAR 32
#define RIGHT_BOT_VBAR 64
struct {
int x, y, w, h;
} segments[] = {
{ 1, 0, 5, 1 }, /* TOP_HBAR */
{ 1, 6, 5, 1 }, /* MID_HBAR */
{ 1, 12, 5, 1 }, /* BOT_HBAR */
{ 0, 1, 1, 5 }, /* LEFT_TOP_VBAR */
{ 0, 7, 1, 5 }, /* LEFT_BOT_VBAR */
{ 6, 1, 1, 5 }, /* RIGHT_TOP_VBAR */
{ 6, 7, 1, 5 } /* RIGHT_BOT_VBAR */
};
static const unsigned char masks[10] = {
/* 0 */ TOP_HBAR |BOT_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR|RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
/* 1 */ RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
/* 2 */ TOP_HBAR|MID_HBAR|BOT_HBAR|LEFT_BOT_VBAR |RIGHT_TOP_VBAR,
/* 3 */ TOP_HBAR|MID_HBAR|BOT_HBAR |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
/* 4 */ MID_HBAR |LEFT_TOP_VBAR |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
/* 5 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR |RIGHT_BOT_VBAR,
/* 6 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR |RIGHT_BOT_VBAR,
/* 7 */ TOP_HBAR |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
/* 8 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR|RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
/* 9 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
};
unsigned mask = masks[digit];
int i;
draw_rectangle(0, dst, dst_linesize, segment_width, 0, 0, 8, 13);
for (i = 0; i < FF_ARRAY_ELEMS(segments); i++)
if (mask & (1<<i))
draw_rectangle(255, dst, dst_linesize, segment_width,
segments[i].x, segments[i].y, segments[i].w, segments[i].h);
}
#define GRADIENT_SIZE (6 * 256)
static void test_fill_picture(AVFilterContext *ctx, AVFrame *frame)
{
TestSourceContext *test = ctx->priv;
uint8_t *p, *p0;
int x, y;
int color, color_rest;
int icolor;
int radius;
int quad0, quad;
int dquad_x, dquad_y;
int grad, dgrad, rgrad, drgrad;
int seg_size;
int second;
int i;
uint8_t *data = frame->data[0];
int width = frame->width;
int height = frame->height;
/* draw colored bars and circle */
radius = (width + height) / 4;
quad0 = width * width / 4 + height * height / 4 - radius * radius;
dquad_y = 1 - height;
p0 = data;
for (y = 0; y < height; y++) {
p = p0;
color = 0;
color_rest = 0;
quad = quad0;
dquad_x = 1 - width;
for (x = 0; x < width; x++) {
icolor = color;
if (quad < 0)
icolor ^= 7;
quad += dquad_x;
dquad_x += 2;
*(p++) = icolor & 1 ? 255 : 0;
*(p++) = icolor & 2 ? 255 : 0;
*(p++) = icolor & 4 ? 255 : 0;
color_rest += 8;
if (color_rest >= width) {
color_rest -= width;
color++;
}
}
quad0 += dquad_y;
dquad_y += 2;
p0 += frame->linesize[0];
}
/* draw sliding color line */
p0 = p = data + frame->linesize[0] * height * 3/4;
grad = (256 * test->nb_frame * test->time_base.num / test->time_base.den) %
GRADIENT_SIZE;
rgrad = 0;
dgrad = GRADIENT_SIZE / width;
drgrad = GRADIENT_SIZE % width;
for (x = 0; x < width; x++) {
*(p++) =
grad < 256 || grad >= 5 * 256 ? 255 :
grad >= 2 * 256 && grad < 4 * 256 ? 0 :
grad < 2 * 256 ? 2 * 256 - 1 - grad : grad - 4 * 256;
*(p++) =
grad >= 4 * 256 ? 0 :
grad >= 1 * 256 && grad < 3 * 256 ? 255 :
grad < 1 * 256 ? grad : 4 * 256 - 1 - grad;
*(p++) =
grad < 2 * 256 ? 0 :
grad >= 3 * 256 && grad < 5 * 256 ? 255 :
grad < 3 * 256 ? grad - 2 * 256 : 6 * 256 - 1 - grad;
grad += dgrad;
rgrad += drgrad;
if (rgrad >= GRADIENT_SIZE) {
grad++;
rgrad -= GRADIENT_SIZE;
}
if (grad >= GRADIENT_SIZE)
grad -= GRADIENT_SIZE;
}
p = p0;
for (y = height / 8; y > 0; y--) {
memcpy(p+frame->linesize[0], p, 3 * width);
p += frame->linesize[0];
}
/* draw digits */
seg_size = width / 80;
if (seg_size >= 1 && height >= 13 * seg_size) {
int64_t p10decimals = 1;
double time = av_q2d(test->time_base) * test->nb_frame *
pow(10, test->nb_decimals);
if (time >= INT_MAX)
return;
for(x=0; x<test->nb_decimals; x++)
p10decimals *= 10;
second = av_rescale_rnd(test->nb_frame * test->time_base.num, p10decimals, test->time_base.den, AV_ROUND_ZERO);
x = width - (width - seg_size * 64) / 2;
y = (height - seg_size * 13) / 2;
p = data + (x*3 + y * frame->linesize[0]);
for (i = 0; i < 8; i++) {
p -= 3 * 8 * seg_size;
draw_digit(second % 10, p, frame->linesize[0], seg_size);
second /= 10;
if (second == 0)
break;
}
}
}
static av_cold int test_init(AVFilterContext *ctx, const char *args)
{
TestSourceContext *test = ctx->priv;
test->class = &testsrc_class;
test->fill_picture_fn = test_fill_picture;
return init(ctx, args);
}
static int test_query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE
};
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
return 0;
}
static const AVFilterPad avfilter_vsrc_testsrc_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = request_frame,
.config_props = config_props,
},
{ NULL }
};
AVFilter avfilter_vsrc_testsrc = {
.name = "testsrc",
.description = NULL_IF_CONFIG_SMALL("Generate test pattern."),
.priv_size = sizeof(TestSourceContext),
.init = test_init,
.uninit = uninit,
.query_formats = test_query_formats,
.inputs = NULL,
.outputs = avfilter_vsrc_testsrc_outputs,
.priv_class = &testsrc_class,
};
#endif /* CONFIG_TESTSRC_FILTER */
#if CONFIG_RGBTESTSRC_FILTER
#define rgbtestsrc_options options
AVFILTER_DEFINE_CLASS(rgbtestsrc);
#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 AVPixelFormat fmt,
uint8_t rgba_map[4])
{
int32_t v;
uint8_t *p;
switch (fmt) {
case AV_PIX_FMT_BGR444: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r >> 4) << 8) | ((g >> 4) << 4) | (b >> 4); break;
case AV_PIX_FMT_RGB444: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b >> 4) << 8) | ((g >> 4) << 4) | (r >> 4); break;
case AV_PIX_FMT_BGR555: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r>>3)<<10) | ((g>>3)<<5) | (b>>3); break;
case AV_PIX_FMT_RGB555: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b>>3)<<10) | ((g>>3)<<5) | (r>>3); break;
case AV_PIX_FMT_BGR565: ((uint16_t*)(dst + y*dst_linesize))[x] = ((r>>3)<<11) | ((g>>2)<<5) | (b>>3); break;
case AV_PIX_FMT_RGB565: ((uint16_t*)(dst + y*dst_linesize))[x] = ((b>>3)<<11) | ((g>>2)<<5) | (r>>3); break;
case AV_PIX_FMT_RGB24:
case AV_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 AV_PIX_FMT_RGBA:
case AV_PIX_FMT_BGRA:
case AV_PIX_FMT_ARGB:
case AV_PIX_FMT_ABGR:
v = (r << (rgba_map[R]*8)) + (g << (rgba_map[G]*8)) + (b << (rgba_map[B]*8)) + (255 << (rgba_map[A]*8));
p = dst + 4*x + y*dst_linesize;
AV_WL32(p, v);
break;
}
}
static void rgbtest_fill_picture(AVFilterContext *ctx, AVFrame *frame)
{
TestSourceContext *test = ctx->priv;
int x, y, w = frame->width, h = frame->height;
for (y = 0; y < h; y++) {
for (x = 0; x < 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(frame->data[0], frame->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)
{
TestSourceContext *test = ctx->priv;
test->draw_once = 1;
test->class = &rgbtestsrc_class;
test->fill_picture_fn = rgbtest_fill_picture;
return init(ctx, args);
}
static int rgbtest_query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_RGBA, AV_PIX_FMT_ARGB, AV_PIX_FMT_BGRA, AV_PIX_FMT_ABGR,
AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB24,
AV_PIX_FMT_RGB444, AV_PIX_FMT_BGR444,
AV_PIX_FMT_RGB565, AV_PIX_FMT_BGR565,
AV_PIX_FMT_RGB555, AV_PIX_FMT_BGR555,
AV_PIX_FMT_NONE
};
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
return 0;
}
static int rgbtest_config_props(AVFilterLink *outlink)
{
TestSourceContext *test = outlink->src->priv;
ff_fill_rgba_map(test->rgba_map, outlink->format);
return config_props(outlink);
}
static const AVFilterPad avfilter_vsrc_rgbtestsrc_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = request_frame,
.config_props = rgbtest_config_props,
},
{ NULL }
};
AVFilter avfilter_vsrc_rgbtestsrc = {
.name = "rgbtestsrc",
.description = NULL_IF_CONFIG_SMALL("Generate RGB test pattern."),
.priv_size = sizeof(TestSourceContext),
.init = rgbtest_init,
.uninit = uninit,
.query_formats = rgbtest_query_formats,
.inputs = NULL,
.outputs = avfilter_vsrc_rgbtestsrc_outputs,
.priv_class = &rgbtestsrc_class,
};
#endif /* CONFIG_RGBTESTSRC_FILTER */
#if CONFIG_SMPTEBARS_FILTER
#define smptebars_options options
AVFILTER_DEFINE_CLASS(smptebars);
static const uint8_t rainbow[7][4] = {
{ 191, 191, 191, 255 }, /* gray */
{ 191, 191, 0, 255 }, /* yellow */
{ 0, 191, 191, 255 }, /* cyan */
{ 0, 191, 0, 255 }, /* green */
{ 191, 0, 191, 255 }, /* magenta */
{ 191, 0, 0, 255 }, /* red */
{ 0, 0, 191, 255 }, /* blue */
};
static const uint8_t wobnair[7][4] = {
{ 0, 0, 191, 255 }, /* blue */
{ 19, 19, 19, 255 }, /* 7.5% intensity black */
{ 191, 0, 191, 255 }, /* magenta */
{ 19, 19, 19, 255 }, /* 7.5% intensity black */
{ 0, 191, 191, 255 }, /* cyan */
{ 19, 19, 19, 255 }, /* 7.5% intensity black */
{ 191, 191, 191, 255 }, /* gray */
};
static const uint8_t white[4] = { 255, 255, 255, 255 };
static const uint8_t black[4] = { 19, 19, 19, 255 }; /* 7.5% intensity black */
/* pluge pulses */
static const uint8_t neg4ire[4] = { 9, 9, 9, 255 }; /* 3.5% intensity black */
static const uint8_t pos4ire[4] = { 29, 29, 29, 255 }; /* 11.5% intensity black */
/* fudged Q/-I */
static const uint8_t i_pixel[4] = { 0, 68, 130, 255 };
static const uint8_t q_pixel[4] = { 67, 0, 130, 255 };
static void inline draw_bar(TestSourceContext *test, const uint8_t *color,
unsigned x, unsigned y, unsigned w, unsigned h,
AVFrame *frame)
{
FFDrawColor draw_color;
x = FFMIN(x, test->w - 1);
y = FFMIN(y, test->h - 1);
w = FFMIN(w, test->w - x);
h = FFMIN(h, test->h - y);
av_assert0(x + w <= test->w);
av_assert0(y + h <= test->h);
ff_draw_color(&test->draw, &draw_color, color);
ff_fill_rectangle(&test->draw, &draw_color,
frame->data, frame->linesize, x, y, w, h);
}
static void smptebars_fill_picture(AVFilterContext *ctx, AVFrame *picref)
{
TestSourceContext *test = ctx->priv;
int r_w, r_h, w_h, p_w, p_h, i, tmp, x = 0;
const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(picref->format);
r_w = FFALIGN((test->w + 6) / 7, 1 << pixdesc->log2_chroma_w);
r_h = FFALIGN(test->h * 2 / 3, 1 << pixdesc->log2_chroma_h);
w_h = FFALIGN(test->h * 3 / 4 - r_h, 1 << pixdesc->log2_chroma_h);
p_w = FFALIGN(r_w * 5 / 4, 1 << pixdesc->log2_chroma_w);
p_h = test->h - w_h - r_h;
for (i = 0; i < 7; i++) {
draw_bar(test, rainbow[i], x, 0, r_w, r_h, picref);
draw_bar(test, wobnair[i], x, r_h, r_w, w_h, picref);
x += r_w;
}
x = 0;
draw_bar(test, i_pixel, x, r_h + w_h, p_w, p_h, picref);
x += p_w;
draw_bar(test, white, x, r_h + w_h, p_w, p_h, picref);
x += p_w;
draw_bar(test, q_pixel, x, r_h + w_h, p_w, p_h, picref);
x += p_w;
tmp = FFALIGN(5 * r_w - x, 1 << pixdesc->log2_chroma_w);
draw_bar(test, black, x, r_h + w_h, tmp, p_h, picref);
x += tmp;
tmp = FFALIGN(r_w / 3, 1 << pixdesc->log2_chroma_w);
draw_bar(test, neg4ire, x, r_h + w_h, tmp, p_h, picref);
x += tmp;
draw_bar(test, black, x, r_h + w_h, tmp, p_h, picref);
x += tmp;
draw_bar(test, pos4ire, x, r_h + w_h, tmp, p_h, picref);
x += tmp;
draw_bar(test, black, x, r_h + w_h, test->w - x, p_h, picref);
}
static av_cold int smptebars_init(AVFilterContext *ctx, const char *args)
{
TestSourceContext *test = ctx->priv;
test->class = &smptebars_class;
test->fill_picture_fn = smptebars_fill_picture;
test->draw_once = 1;
return init(ctx, args);
}
static int smptebars_query_formats(AVFilterContext *ctx)
{
ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
return 0;
}
static int smptebars_config_props(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
TestSourceContext *test = ctx->priv;
ff_draw_init(&test->draw, outlink->format, 0);
return config_props(outlink);
}
static const AVFilterPad smptebars_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = request_frame,
.config_props = smptebars_config_props,
},
{ NULL }
};
AVFilter avfilter_vsrc_smptebars = {
.name = "smptebars",
.description = NULL_IF_CONFIG_SMALL("Generate SMPTE color bars."),
.priv_size = sizeof(TestSourceContext),
.init = smptebars_init,
.uninit = uninit,
.query_formats = smptebars_query_formats,
.inputs = NULL,
.outputs = smptebars_outputs,
.priv_class = &smptebars_class,
};
#endif /* CONFIG_SMPTEBARS_FILTER */
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