|
|
@@ -0,0 +1,167 @@
|
|
|
+/*
|
|
|
+ * 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
|
|
|
+ */
|
|
|
+
|
|
|
+#include "avfilter.h"
|
|
|
+#include "libavutil/pixdesc.h"
|
|
|
+#include "libavutil/colorspace.h"
|
|
|
+#include "libavutil/imgutils.h"
|
|
|
+#include "libavutil/parseutils.h"
|
|
|
+#include "drawutils.h"
|
|
|
+
|
|
|
+typedef struct {
|
|
|
+ int w, h;
|
|
|
+ uint8_t color[4];
|
|
|
+ AVRational time_base;
|
|
|
+ uint8_t *line[4];
|
|
|
+ int line_step[4];
|
|
|
+ int hsub, vsub; ///< chroma subsampling values
|
|
|
+ uint64_t pts;
|
|
|
+} 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, color_string, -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 PixelFormat pix_fmts[] = {
|
|
|
+ PIX_FMT_ARGB, PIX_FMT_RGBA,
|
|
|
+ PIX_FMT_ABGR, PIX_FMT_BGRA,
|
|
|
+ PIX_FMT_RGB24, PIX_FMT_BGR24,
|
|
|
+
|
|
|
+ PIX_FMT_YUV444P, PIX_FMT_YUV422P,
|
|
|
+ PIX_FMT_YUV420P, PIX_FMT_YUV411P,
|
|
|
+ PIX_FMT_YUV410P, PIX_FMT_YUV440P,
|
|
|
+ PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P,
|
|
|
+ PIX_FMT_YUVJ420P, PIX_FMT_YUVJ440P,
|
|
|
+ PIX_FMT_YUVA420P,
|
|
|
+
|
|
|
+ PIX_FMT_NONE
|
|
|
+ };
|
|
|
+
|
|
|
+ avfilter_set_common_formats(ctx, avfilter_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_descriptors[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_INFO, "w:%d h:%d r:%d/%d color:0x%02x%02x%02x%02x[%s]\n",
|
|
|
+ color->w, color->h, color->time_base.den, color->time_base.num,
|
|
|
+ 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;
|
|
|
+
|
|
|
+ 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->pixel_aspect = (AVRational) {1, 1};
|
|
|
+ picref->pts = av_rescale_q(color->pts++, color->time_base, AV_TIME_BASE_Q);
|
|
|
+ picref->pos = 0;
|
|
|
+
|
|
|
+ avfilter_start_frame(link, avfilter_ref_buffer(picref, ~0));
|
|
|
+ ff_draw_rectangle(picref->data, picref->linesize,
|
|
|
+ color->line, color->line_step, color->hsub, color->vsub,
|
|
|
+ 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,
|
|
|
+ .uninit = color_uninit,
|
|
|
+
|
|
|
+ .query_formats = query_formats,
|
|
|
+
|
|
|
+ .inputs = (AVFilterPad[]) {{ .name = NULL}},
|
|
|
+
|
|
|
+ .outputs = (AVFilterPad[]) {{ .name = "default",
|
|
|
+ .type = AVMEDIA_TYPE_VIDEO,
|
|
|
+ .request_frame = color_request_frame,
|
|
|
+ .config_props = color_config_props },
|
|
|
+ { .name = NULL}},
|
|
|
+};
|
Stefano Sabatini