mirror of https://git.ffmpeg.org/ffmpeg.git
203 lines
6.2 KiB
C
203 lines
6.2 KiB
C
/*
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* Copyright (c) 2010 Stefano Sabatini
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* color source
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*/
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#include <stdio.h>
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#include <string.h>
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/colorspace.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/internal.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/mem.h"
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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#include "drawutils.h"
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typedef struct ColorContext {
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const AVClass *class;
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int w, h;
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uint8_t color[4];
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AVRational time_base;
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uint8_t *line[4];
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int line_step[4];
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int hsub, vsub; ///< chroma subsampling values
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uint64_t pts;
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char *color_str;
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char *size_str;
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char *framerate_str;
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} ColorContext;
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static av_cold int color_init(AVFilterContext *ctx)
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{
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ColorContext *color = ctx->priv;
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AVRational frame_rate_q;
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int ret;
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if (av_parse_video_size(&color->w, &color->h, color->size_str) < 0) {
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av_log(ctx, AV_LOG_ERROR, "Invalid frame size: %s\n", color->size_str);
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return AVERROR(EINVAL);
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}
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if (av_parse_video_rate(&frame_rate_q, color->framerate_str) < 0 ||
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frame_rate_q.den <= 0 || frame_rate_q.num <= 0) {
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av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", color->framerate_str);
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return AVERROR(EINVAL);
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}
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color->time_base.num = frame_rate_q.den;
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color->time_base.den = frame_rate_q.num;
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if ((ret = av_parse_color(color->color, color->color_str, -1, ctx)) < 0)
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return ret;
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return 0;
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}
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static av_cold void color_uninit(AVFilterContext *ctx)
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{
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ColorContext *color = ctx->priv;
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int i;
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for (i = 0; i < 4; i++) {
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av_freep(&color->line[i]);
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color->line_step[i] = 0;
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}
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}
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
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AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
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AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
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AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
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AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
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AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_YUVA420P,
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AV_PIX_FMT_NONE
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};
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ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
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return 0;
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}
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static int color_config_props(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->src;
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ColorContext *color = ctx->priv;
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uint8_t rgba_color[4];
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int is_packed_rgba;
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const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
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color->hsub = pix_desc->log2_chroma_w;
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color->vsub = pix_desc->log2_chroma_h;
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color->w &= ~((1 << color->hsub) - 1);
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color->h &= ~((1 << color->vsub) - 1);
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if (av_image_check_size(color->w, color->h, 0, ctx) < 0)
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return AVERROR(EINVAL);
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memcpy(rgba_color, color->color, sizeof(rgba_color));
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ff_fill_line_with_color(color->line, color->line_step, color->w, color->color,
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inlink->format, rgba_color, &is_packed_rgba, NULL);
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av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d r:%d/%d color:0x%02x%02x%02x%02x[%s]\n",
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color->w, color->h, color->time_base.den, color->time_base.num,
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color->color[0], color->color[1], color->color[2], color->color[3],
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is_packed_rgba ? "rgba" : "yuva");
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inlink->w = color->w;
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inlink->h = color->h;
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inlink->time_base = color->time_base;
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return 0;
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}
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static int color_request_frame(AVFilterLink *link)
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{
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ColorContext *color = link->src->priv;
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AVFrame *frame = ff_get_video_buffer(link, color->w, color->h);
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if (!frame)
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return AVERROR(ENOMEM);
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frame->sample_aspect_ratio = (AVRational) {1, 1};
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frame->pts = color->pts++;
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ff_draw_rectangle(frame->data, frame->linesize,
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color->line, color->line_step, color->hsub, color->vsub,
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0, 0, color->w, color->h);
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return ff_filter_frame(link, frame);
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}
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#define OFFSET(x) offsetof(ColorContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption options[] = {
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{ "color", "Output video color", OFFSET(color_str), AV_OPT_TYPE_STRING, { .str = "black" }, .flags = FLAGS },
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{ "size", "Output video size (wxh or an abbreviation)", OFFSET(size_str), AV_OPT_TYPE_STRING, { .str = "320x240" }, .flags = FLAGS },
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{ "framerate", "Output video framerate", OFFSET(framerate_str), AV_OPT_TYPE_STRING, { .str = "25" }, .flags = FLAGS },
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{ NULL },
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};
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static const AVClass color_class = {
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.class_name = "color",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const AVFilterPad avfilter_vsrc_color_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.request_frame = color_request_frame,
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.config_props = color_config_props
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},
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{ NULL }
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};
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AVFilter ff_vsrc_color = {
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.name = "color",
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.description = NULL_IF_CONFIG_SMALL("Provide an uniformly colored input, syntax is: [color[:size[:rate]]]"),
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.priv_class = &color_class,
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.priv_size = sizeof(ColorContext),
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.init = color_init,
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.uninit = color_uninit,
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.query_formats = query_formats,
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.inputs = NULL,
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.outputs = avfilter_vsrc_color_outputs,
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};
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