2011-02-20 22:42:24 +00:00
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/*
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* Copyright (c) 2010 Stefano Sabatini
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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2011-06-17 23:46:27 +00:00
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/**
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* @file
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* color source
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*/
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2011-02-20 22:42:24 +00:00
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#include "avfilter.h"
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2012-05-30 08:12:55 +00:00
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#include "formats.h"
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2012-06-12 18:12:42 +00:00
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#include "internal.h"
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2012-05-30 09:20:32 +00:00
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#include "video.h"
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2011-02-20 22:42:24 +00:00
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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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2011-06-04 11:58:23 +00:00
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#include "libavutil/mathematics.h"
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2012-06-19 13:29:26 +00:00
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#include "libavutil/opt.h"
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2011-02-20 22:42:24 +00:00
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#include "libavutil/parseutils.h"
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#include "drawutils.h"
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typedef struct {
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2012-06-19 13:29:26 +00:00
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const AVClass *class;
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2011-02-20 22:42:24 +00:00
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int w, h;
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2012-06-19 13:29:26 +00:00
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char *rate_str;
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char *color_str;
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2012-03-17 17:55:46 +00:00
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uint8_t color_rgba[4];
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2011-02-20 22:42:24 +00:00
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AVRational time_base;
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uint64_t pts;
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2012-03-17 17:55:46 +00:00
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FFDrawContext draw;
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FFDrawColor color;
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2011-02-20 22:42:24 +00:00
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} ColorContext;
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2012-06-19 13:29:26 +00:00
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#define OFFSET(x) offsetof(ColorContext, x)
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static const AVOption color_options[]= {
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{ "size", "set frame size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0 },
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{ "s", "set frame size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0 },
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{ "rate", "set frame rate", OFFSET(rate_str), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0 },
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{ "r", "set frame rate", OFFSET(rate_str), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0 },
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{ "color", "set color", OFFSET(color_str), AV_OPT_TYPE_STRING, {.str = "black"}, CHAR_MIN, CHAR_MAX },
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{ "c", "set color", OFFSET(color_str), AV_OPT_TYPE_STRING, {.str = "black"}, CHAR_MIN, CHAR_MAX },
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{ NULL },
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};
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2012-06-22 12:33:09 +00:00
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AVFILTER_DEFINE_CLASS(color);
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2012-06-19 13:29:26 +00:00
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2012-06-21 05:55:56 +00:00
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static av_cold int color_init(AVFilterContext *ctx, const char *args)
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2011-02-20 22:42:24 +00:00
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{
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ColorContext *color = ctx->priv;
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AVRational frame_rate_q;
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2012-06-19 13:29:26 +00:00
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int ret = 0;
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2011-02-20 22:42:24 +00:00
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2012-06-19 13:29:26 +00:00
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color->class = &color_class;
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2011-02-20 22:42:24 +00:00
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2012-07-29 14:26:58 +00:00
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av_opt_set_defaults(color);
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if ((ret = av_set_options_string(color, args, "=", ":")) < 0) {
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av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
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goto end;
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}
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if (av_parse_video_rate(&frame_rate_q, color->rate_str) < 0) {
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av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", color->rate_str);
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ret = AVERROR(EINVAL);
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goto end;
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}
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if (av_parse_color(color->color_rgba, color->color_str, -1, ctx) < 0) {
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ret = AVERROR(EINVAL);
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goto end;
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}
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2012-06-19 13:29:26 +00:00
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2011-02-20 22:42:24 +00:00
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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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2012-06-19 13:29:26 +00:00
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end:
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av_opt_free(color);
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return ret;
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2011-02-20 22:42:24 +00:00
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}
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static int query_formats(AVFilterContext *ctx)
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{
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2012-06-05 20:43:44 +00:00
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ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
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2011-02-20 22:42:24 +00:00
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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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2012-03-17 17:55:46 +00:00
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ff_draw_init(&color->draw, inlink->format, 0);
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ff_draw_color(&color->draw, &color->color, color->color_rgba);
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2011-02-20 22:42:24 +00:00
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2012-03-17 17:55:46 +00:00
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color->w = ff_draw_round_to_sub(&color->draw, 0, -1, color->w);
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color->h = ff_draw_round_to_sub(&color->draw, 1, -1, color->h);
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2011-02-20 22:42:24 +00:00
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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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2012-06-26 23:58:09 +00:00
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av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d r:%d/%d color:0x%02x%02x%02x%02x\n",
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2011-02-20 22:42:24 +00:00
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color->w, color->h, color->time_base.den, color->time_base.num,
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2012-03-17 17:55:46 +00:00
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color->color_rgba[0], color->color_rgba[1], color->color_rgba[2], color->color_rgba[3]);
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2011-02-20 22:42:24 +00:00
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inlink->w = color->w;
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inlink->h = color->h;
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2011-06-17 23:52:40 +00:00
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inlink->time_base = color->time_base;
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2011-02-20 22:42:24 +00:00
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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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2012-05-30 08:31:48 +00:00
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AVFilterBufferRef *picref = ff_get_video_buffer(link, AV_PERM_WRITE, color->w, color->h);
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2012-07-15 09:16:53 +00:00
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AVFilterBufferRef *buf_out;
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2012-07-15 07:47:01 +00:00
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int ret;
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2012-07-15 09:16:53 +00:00
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if (!picref)
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return AVERROR(ENOMEM);
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2011-04-29 11:12:39 +00:00
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picref->video->sample_aspect_ratio = (AVRational) {1, 1};
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2011-06-17 23:52:40 +00:00
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picref->pts = color->pts++;
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2011-06-17 23:47:37 +00:00
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picref->pos = -1;
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2011-02-20 22:42:24 +00:00
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2012-07-15 09:16:53 +00:00
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buf_out = avfilter_ref_buffer(picref, ~0);
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if (!buf_out) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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ret = ff_start_frame(link, buf_out);
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2012-07-15 07:47:01 +00:00
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if (ret < 0)
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goto fail;
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2012-03-17 17:55:46 +00:00
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ff_fill_rectangle(&color->draw, &color->color, picref->data, picref->linesize,
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2011-02-20 22:42:24 +00:00
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0, 0, color->w, color->h);
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2012-07-15 07:47:01 +00:00
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ret = ff_draw_slice(link, 0, color->h, 1);
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if (ret < 0)
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goto fail;
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ret = ff_end_frame(link);
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fail:
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2011-02-20 22:42:24 +00:00
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avfilter_unref_buffer(picref);
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2012-07-15 07:47:01 +00:00
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return ret;
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2011-02-20 22:42:24 +00:00
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}
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AVFilter avfilter_vsrc_color = {
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.name = "color",
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2012-06-19 13:29:26 +00:00
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.description = NULL_IF_CONFIG_SMALL("Provide an uniformly colored input."),
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2011-02-20 22:42:24 +00:00
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.priv_size = sizeof(ColorContext),
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.init = color_init,
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.query_formats = query_formats,
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2011-11-05 13:39:24 +00:00
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.inputs = (const AVFilterPad[]) {{ .name = NULL}},
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2011-02-20 22:42:24 +00:00
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2012-07-21 16:45:52 +00:00
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.outputs = (const AVFilterPad[]) {{ .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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{ .name = NULL}},
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2011-02-20 22:42:24 +00:00
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};
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