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/*
* Copyright (c) 2010 Stefano Sabatini
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* color source
*/
#include <stdio.h>
#include <string.h>
#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/internal.h"
#include "libavutil/mathematics.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "drawutils.h"
typedef struct ColorContext {
const AVClass *class;
int w, h;
uint8_t color[4];
AVRational frame_rate;
uint8_t *line[4];
int line_step[4];
int hsub, vsub; ///< chroma subsampling values
uint64_t pts;
char *color_str;
char *size_str;
char *framerate_str;
} ColorContext;
static av_cold int color_init(AVFilterContext *ctx)
{
ColorContext *color = ctx->priv;
int ret;
if (av_parse_video_size(&color->w, &color->h, color->size_str) < 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid frame size: %s\n", color->size_str);
return AVERROR(EINVAL);
}
if (av_parse_video_rate(&color->frame_rate, color->framerate_str) < 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", color->framerate_str);
return AVERROR(EINVAL);
}
if ((ret = av_parse_color(color->color, color->color_str, -1, ctx)) < 0)
return ret;
return 0;
}
static av_cold void color_uninit(AVFilterContext *ctx)
{
ColorContext *color = ctx->priv;
int i;
for (i = 0; i < 4; i++) {
av_freep(&color->line[i]);
color->line_step[i] = 0;
}
}
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_YUVA420P,
AV_PIX_FMT_NONE
};
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
return 0;
}
static int color_config_props(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->src;
ColorContext *color = ctx->priv;
uint8_t rgba_color[4];
int is_packed_rgba;
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
color->hsub = pix_desc->log2_chroma_w;
color->vsub = pix_desc->log2_chroma_h;
color->w &= ~((1 << color->hsub) - 1);
color->h &= ~((1 << color->vsub) - 1);
if (av_image_check_size(color->w, color->h, 0, ctx) < 0)
return AVERROR(EINVAL);
memcpy(rgba_color, color->color, sizeof(rgba_color));
ff_fill_line_with_color(color->line, color->line_step, color->w, color->color,
inlink->format, rgba_color, &is_packed_rgba, NULL);
av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d r:%d/%d color:0x%02x%02x%02x%02x[%s]\n",
color->w, color->h, color->frame_rate.num, color->frame_rate.den,
color->color[0], color->color[1], color->color[2], color->color[3],
is_packed_rgba ? "rgba" : "yuva");
inlink->w = color->w;
inlink->h = color->h;
inlink->time_base = av_inv_q(color->frame_rate);
inlink->frame_rate = color->frame_rate;
return 0;
}
static int color_request_frame(AVFilterLink *link)
{
ColorContext *color = link->src->priv;
AVFrame *frame = ff_get_video_buffer(link, color->w, color->h);
if (!frame)
return AVERROR(ENOMEM);
frame->sample_aspect_ratio = (AVRational) {1, 1};
frame->pts = color->pts++;
ff_draw_rectangle(frame->data, frame->linesize,
color->line, color->line_step, color->hsub, color->vsub,
0, 0, color->w, color->h);
return ff_filter_frame(link, frame);
}
#define OFFSET(x) offsetof(ColorContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
static const AVOption options[] = {
{ "color", "Output video color", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, .flags = FLAGS },
{ "size", "Output video size (wxh or an abbreviation)", OFFSET(size_str), AV_OPT_TYPE_STRING, { .str = "320x240" }, .flags = FLAGS },
{ "framerate", "Output video framerate", OFFSET(framerate_str), AV_OPT_TYPE_STRING, { .str = "25" }, .flags = FLAGS },
{ NULL },
};
static const AVClass color_class = {
.class_name = "color",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
static const AVFilterPad avfilter_vsrc_color_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = color_request_frame,
.config_props = color_config_props
},
{ NULL }
};
AVFilter ff_vsrc_color = {
.name = "color",
.description = NULL_IF_CONFIG_SMALL("Provide an uniformly colored input, syntax is: [color[:size[:rate]]]"),
.priv_class = &color_class,
.priv_size = sizeof(ColorContext),
.init = color_init,
.uninit = color_uninit,
.query_formats = query_formats,
.inputs = NULL,
.outputs = avfilter_vsrc_color_outputs,
};
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