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/*
* Copyright (c) 2010 Stefano Sabatini
*
* 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
* color source
*/
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "libavutil/pixdesc.h"
#include "libavutil/colorspace.h"
#include "libavutil/imgutils.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "drawutils.h"
typedef struct {
const AVClass *class;
int w, h;
char *rate_str;
char *color_str;
uint8_t color_rgba[4];
AVRational time_base;
uint64_t pts;
FFDrawContext draw;
FFDrawColor color;
} ColorContext;
#define OFFSET(x) offsetof(ColorContext, x)
static const AVOption color_options[]= {
{ "size", "set frame size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0 },
{ "s", "set frame size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0 },
{ "rate", "set frame rate", OFFSET(rate_str), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0 },
{ "r", "set frame rate", OFFSET(rate_str), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0 },
{ "color", "set color", OFFSET(color_str), AV_OPT_TYPE_STRING, {.str = "black"}, CHAR_MIN, CHAR_MAX },
{ "c", "set color", OFFSET(color_str), AV_OPT_TYPE_STRING, {.str = "black"}, CHAR_MIN, CHAR_MAX },
{ NULL },
};
AVFILTER_DEFINE_CLASS(color);
static av_cold int color_init(AVFilterContext *ctx, const char *args)
{
ColorContext *color = ctx->priv;
char color_string[128] = "black";
char frame_size [128] = "320x240";
char frame_rate [128] = "25";
AVRational frame_rate_q;
char *colon = 0, *equal = 0;
int ret = 0;
color->class = &color_class;
if (args) {
colon = strchr(args, ':');
equal = strchr(args, '=');
}
if (!args || (equal && (!colon || equal < colon))) {
av_opt_set_defaults(color);
if ((ret = av_set_options_string(color, args, "=", ":")) < 0) {
av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
goto end;
}
if (av_parse_video_rate(&frame_rate_q, color->rate_str) < 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", color->rate_str);
ret = AVERROR(EINVAL);
goto end;
}
if (av_parse_color(color->color_rgba, color->color_str, -1, ctx) < 0) {
ret = AVERROR(EINVAL);
goto end;
}
} else {
av_log(ctx, AV_LOG_WARNING, "Flat options syntax is deprecated, use key=value pairs.\n");
sscanf(args, "%127[^:]:%127[^:]:%127s", color_string, frame_size, frame_rate);
if (av_parse_video_size(&color->w, &color->h, frame_size) < 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid frame size: %s\n", frame_size);
return AVERROR(EINVAL);
}
if (av_parse_video_rate(&frame_rate_q, frame_rate) < 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", frame_rate);
return AVERROR(EINVAL);
}
if (av_parse_color(color->color_rgba, color_string, -1, ctx) < 0)
return AVERROR(EINVAL);
}
color->time_base.num = frame_rate_q.den;
color->time_base.den = frame_rate_q.num;
end:
av_opt_free(color);
return ret;
}
static int 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;
ColorContext *color = ctx->priv;
ff_draw_init(&color->draw, inlink->format, 0);
ff_draw_color(&color->draw, &color->color, color->color_rgba);
color->w = ff_draw_round_to_sub(&color->draw, 0, -1, color->w);
color->h = ff_draw_round_to_sub(&color->draw, 1, -1, color->h);
if (av_image_check_size(color->w, color->h, 0, ctx) < 0)
return AVERROR(EINVAL);
av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d r:%d/%d color:0x%02x%02x%02x%02x\n",
color->w, color->h, color->time_base.den, color->time_base.num,
color->color_rgba[0], color->color_rgba[1], color->color_rgba[2], color->color_rgba[3]);
inlink->w = color->w;
inlink->h = color->h;
inlink->time_base = color->time_base;
return 0;
}
static int color_request_frame(AVFilterLink *link)
{
ColorContext *color = link->src->priv;
AVFilterBufferRef *picref = ff_get_video_buffer(link, AV_PERM_WRITE, color->w, color->h);
picref->video->sample_aspect_ratio = (AVRational) {1, 1};
picref->pts = color->pts++;
picref->pos = -1;
ff_start_frame(link, avfilter_ref_buffer(picref, ~0));
ff_fill_rectangle(&color->draw, &color->color, picref->data, picref->linesize,
0, 0, color->w, color->h);
ff_draw_slice(link, 0, color->h, 1);
ff_end_frame(link);
avfilter_unref_buffer(picref);
return 0;
}
AVFilter avfilter_vsrc_color = {
.name = "color",
.description = NULL_IF_CONFIG_SMALL("Provide an uniformly colored input."),
.priv_size = sizeof(ColorContext),
.init = color_init,
.query_formats = query_formats,
.inputs = (const AVFilterPad[]) {{ .name = NULL}},
.outputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = color_request_frame,
.config_props = color_config_props },
{ .name = NULL}},
};
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