[FFmpeg-devel] [PATCH] smptebars filter
Paul B Mahol
onemda at gmail.com
Wed Jun 20 03:54:58 CEST 2012
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
doc/filters.texi | 20 ++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vsrc_smptebars.c | 215 ++++++++++++++++++++++++++++++++++++++++++
4 files changed, 237 insertions(+), 0 deletions(-)
create mode 100644 libavfilter/vsrc_smptebars.c
diff --git a/doc/filters.texi b/doc/filters.texi
index 566fbfc..0c0c490 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -3799,6 +3799,26 @@ the @code{mp=geq} filter:
nullsrc=s=256x256, mp=geq=random(1)*255:128:128
@end example
+ at section smptebars
+
+Generate SMPTE color bars.
+
+This source accepts a list of options in the form of
+ at var{key}=@var{value} pairs separated by ":". A description of the
+accepted options follows.
+
+ at table @option
+ at item size, s
+Set the size of the output video.
+Default is 720x480.
+
+ at item rate, r
+Set the video rate, that is the number of frames generated per second.
+Default is 30.
+
+ at item sar
+Set the sample aspect ratio of the sourced video.
+
@c man end VIDEO SOURCES
@chapter Video Sinks
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 72bb640..193bfa1 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -136,6 +136,7 @@ OBJS-$(CONFIG_MOVIE_FILTER) += src_movie.o
OBJS-$(CONFIG_MPTESTSRC_FILTER) += vsrc_mptestsrc.o
OBJS-$(CONFIG_NULLSRC_FILTER) += vsrc_testsrc.o
OBJS-$(CONFIG_RGBTESTSRC_FILTER) += vsrc_testsrc.o
+OBJS-$(CONFIG_SMPTEBARS_FILTER) += vsrc_smptebars.o
OBJS-$(CONFIG_TESTSRC_FILTER) += vsrc_testsrc.o
OBJS-$(CONFIG_BUFFERSINK_FILTER) += sink_buffer.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 35065d5..a4e354b 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -124,6 +124,7 @@ void avfilter_register_all(void)
REGISTER_FILTER (MPTESTSRC, mptestsrc, vsrc);
REGISTER_FILTER (NULLSRC, nullsrc, vsrc);
REGISTER_FILTER (RGBTESTSRC, rgbtestsrc, vsrc);
+ REGISTER_FILTER (SMPTEBARS, smptebars, vsrc);
REGISTER_FILTER (TESTSRC, testsrc, vsrc);
REGISTER_FILTER (BUFFERSINK, buffersink, vsink);
diff --git a/libavfilter/vsrc_smptebars.c b/libavfilter/vsrc_smptebars.c
new file mode 100644
index 0000000..70157e8
--- /dev/null
+++ b/libavfilter/vsrc_smptebars.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright (c) 2012 Paul B Mahol
+ *
+ * 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 "libavutil/imgutils.h"
+#include "libavutil/opt.h"
+#include "libavutil/parseutils.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "video.h"
+#include "drawutils.h"
+
+typedef struct {
+ const AVClass *class;
+ int w, h;
+ AVRational time_base;
+ AVRational sar;
+ char *rate;
+ int nb_decimals;
+ FFDrawContext draw;
+} SMPTEBarsContext;
+
+#define OFFSET(x) offsetof(SMPTEBarsContext, x)
+
+static const AVOption smptebars_options[]= {
+ { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "720x480"}, 0, 0 },
+ { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "720x480"}, 0, 0 },
+ { "rate", "set video rate", OFFSET(rate), AV_OPT_TYPE_STRING, {.str = "30"}, 0, 0 },
+ { "r", "set video rate", OFFSET(rate), AV_OPT_TYPE_STRING, {.str = "30"}, 0, 0 },
+ { "sar", "set video sample aspect ratio", OFFSET(sar), AV_OPT_TYPE_RATIONAL, {.dbl= 1}, 0, INT_MAX },
+ { NULL },
+};
+
+static const AVClass smptebars_class = {
+ .class_name = "smptebars",
+ .item_name = av_default_item_name,
+ .option = smptebars_options,
+ .version = LIBAVUTIL_VERSION_INT,
+ .category = AV_CLASS_CATEGORY_FILTER,
+};
+
+static av_cold int smptebars_init(AVFilterContext *ctx, const char *args, void *opaque)
+{
+ SMPTEBarsContext *smpte = ctx->priv;
+ AVRational frame_rate_q;
+ int ret = 0;
+
+ smpte->class = &smptebars_class;
+
+ av_opt_set_defaults(smpte);
+ if ((ret = (av_set_options_string(smpte, args, "=", ":"))) < 0) {
+ av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
+ ret = AVERROR(EINVAL);
+ goto end;
+ }
+ if (av_parse_video_rate(&frame_rate_q, smpte->rate) < 0 ||
+ frame_rate_q.den <= 0 || frame_rate_q.num <= 0) {
+ av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", smpte->rate);
+ ret = AVERROR(EINVAL);
+ goto end;
+ }
+
+ smpte->time_base.num = frame_rate_q.den;
+ smpte->time_base.den = frame_rate_q.num;
+
+end:
+ av_opt_free(smpte);
+ return ret;
+}
+
+static int smptebars_query_formats(AVFilterContext *ctx)
+{
+ ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
+ return 0;
+}
+
+static uint8_t rainbow[7][4] = {
+ { 191, 191, 191, 255},
+ { 191, 191, 0, 255},
+ { 0, 191, 191, 255},
+ { 0, 191, 0, 255},
+ { 191, 0, 191, 255},
+ { 191, 0, 0, 255},
+ { 0, 0, 191, 255},
+};
+
+static uint8_t wobnair[7][4] = {
+ { 0, 0, 191, 255},
+ { 0, 0, 0, 255},
+ { 191, 0, 191, 255},
+ { 0, 0, 0, 255},
+ { 0, 191, 191, 255},
+ { 0, 0, 0, 255},
+ { 191, 191, 191, 255},
+};
+
+static uint8_t white[4] = { 255, 255, 255, 255 };
+static uint8_t black[4] = { 0, 0, 0, 255 };
+
+/* made up values */
+static uint8_t neg4ire[4] = { 7, 7, 7, 255 };
+static uint8_t pos4ire[4] = { 17, 17, 17, 255 };
+static uint8_t i_pixel[4] = { 224, 0, 0, 255 };
+static uint8_t q_pixel[4] = { 0, 0, 176, 255 };
+
+static void draw_smptebars(AVFilterContext *ctx, AVFilterBufferRef *picref)
+{
+ SMPTEBarsContext *smpte = ctx->priv;
+ FFDrawColor color;
+ int r_w, r_h, w_h, p_w, p_h, i, x = 0;
+
+ r_w = (smpte->w + 6 ) / 7;
+ r_h = smpte->h * 2 / 3;
+ w_h = smpte->h * 3 / 4 - r_h;
+ p_w = r_w * 5 / 4;
+ p_h = smpte->h - w_h - r_h;
+ for (i = 0; i < 7; i++) {
+ ff_draw_color(&smpte->draw, &color, rainbow[i]);
+ ff_fill_rectangle(&smpte->draw, &color, picref->data, picref->linesize, x, 0, r_w, r_h);
+ ff_draw_color(&smpte->draw, &color, wobnair[i]);
+ ff_fill_rectangle(&smpte->draw, &color, picref->data, picref->linesize, x, r_h, r_w, w_h);
+ x += r_w;
+ }
+ x = 0;
+ ff_draw_color(&smpte->draw, &color, i_pixel);
+ ff_fill_rectangle(&smpte->draw, &color, picref->data, picref->linesize, x, r_h + w_h, p_w, p_h);
+ x += p_w;
+ ff_draw_color(&smpte->draw, &color, white);
+ ff_fill_rectangle(&smpte->draw, &color, picref->data, picref->linesize, x, r_h + w_h, p_w, p_h);
+ x += p_w;
+ ff_draw_color(&smpte->draw, &color, q_pixel);
+ ff_fill_rectangle(&smpte->draw, &color, picref->data, picref->linesize, x, r_h + w_h, p_w, p_h);
+ x += p_w;
+ ff_draw_color(&smpte->draw, &color, black);
+ ff_fill_rectangle(&smpte->draw, &color, picref->data, picref->linesize, x, r_h + w_h, 5 * r_w - x, p_h);
+ x += 5 * r_w - x;
+ ff_draw_color(&smpte->draw, &color, neg4ire);
+ ff_fill_rectangle(&smpte->draw, &color, picref->data, picref->linesize, x, r_h + w_h, r_w / 3, p_h);
+ x += r_w / 3;
+ ff_draw_color(&smpte->draw, &color, black);
+ ff_fill_rectangle(&smpte->draw, &color, picref->data, picref->linesize, x, r_h + w_h, r_w / 3, p_h);
+ x += r_w / 3;
+ ff_draw_color(&smpte->draw, &color, pos4ire);
+ ff_fill_rectangle(&smpte->draw, &color, picref->data, picref->linesize, x, r_h + w_h, r_w / 3, p_h);
+ x += r_w / 3;
+ ff_draw_color(&smpte->draw, &color, black);
+ ff_fill_rectangle(&smpte->draw, &color, picref->data, picref->linesize, x, r_h + w_h, smpte->w - x, p_h);
+}
+
+static int request_frame(AVFilterLink *outlink)
+{
+ SMPTEBarsContext *smpte = outlink->src->priv;
+ AVFilterBufferRef *picref;
+
+ picref = ff_get_video_buffer(outlink, AV_PERM_WRITE, smpte->w, smpte->h);
+ picref->video->sample_aspect_ratio = smpte->sar;
+
+ ff_start_frame(outlink, avfilter_ref_buffer(picref, ~0));
+ draw_smptebars(outlink->src, picref);
+ ff_draw_slice(outlink, 0, picref->video->h, 1);
+ ff_end_frame(outlink);
+ avfilter_unref_buffer(picref);
+ return 0;
+}
+
+static int config_props(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ SMPTEBarsContext *smpte = ctx->priv;
+
+ ff_draw_init(&smpte->draw, outlink->format, 0);
+
+ if (av_image_check_size(smpte->w, smpte->h, 0, ctx) < 0)
+ return AVERROR(EINVAL);
+
+ outlink->w = smpte->w;
+ outlink->h = smpte->h;
+ outlink->sample_aspect_ratio = smpte->sar;
+ outlink->time_base = smpte->time_base;
+
+ return 0;
+}
+
+AVFilter avfilter_vsrc_smptebars = {
+ .name = "smptebars",
+ .description = NULL_IF_CONFIG_SMALL("Generate SMPTE color bars."),
+ .priv_size = sizeof(SMPTEBarsContext),
+ .init = smptebars_init,
+
+ .query_formats = smptebars_query_formats,
+
+ .inputs = (const AVFilterPad[]) {{ .name = NULL}},
+
+ .outputs = (const AVFilterPad[]) {{ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .request_frame = request_frame,
+ .config_props = config_props, },
+ { .name = NULL }},
+};
--
1.7.7
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