| /* |
| * 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 "libavutil/pixdesc.h" |
| #include "libavutil/colorspace.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/mathematics.h" |
| #include "libavutil/parseutils.h" |
| #include "drawutils.h" |
| |
| typedef struct { |
| int w, h; |
| uint8_t color_rgba[4]; |
| AVRational time_base; |
| uint64_t pts; |
| FFDrawContext draw; |
| FFDrawColor color; |
| } ColorContext; |
| |
| static av_cold int color_init(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| ColorContext *color = ctx->priv; |
| char color_string[128] = "black"; |
| char frame_size [128] = "320x240"; |
| char frame_rate [128] = "25"; |
| AVRational frame_rate_q; |
| int ret; |
| |
| if (args) |
| 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 || |
| frame_rate_q.den <= 0 || frame_rate_q.num <= 0) { |
| av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", frame_rate); |
| return AVERROR(EINVAL); |
| } |
| color->time_base.num = frame_rate_q.den; |
| color->time_base.den = frame_rate_q.num; |
| |
| if ((ret = av_parse_color(color->color_rgba, color_string, -1, ctx)) < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| avfilter_set_common_pixel_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_INFO, "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 = avfilter_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; |
| |
| avfilter_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); |
| avfilter_draw_slice(link, 0, color->h, 1); |
| avfilter_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, syntax is: [color[:size[:rate]]]."), |
| |
| .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}}, |
| }; |