Signed-off-by: Paul B Mahol <one...@gmail.com>
---
doc/filters.texi | 40 +++++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_tpad.c | 218 +++++++++++++++++++++++++++++++++++++++
4 files changed, 260 insertions(+)
create mode 100644 libavfilter/vf_tpad.c
diff --git a/doc/filters.texi b/doc/filters.texi
index 9b84b1145b..76eec2e918 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -16676,6 +16676,46 @@ embedded peak information in display metadata is not
reliable or when tone
mapping from a lower range to a higher range.
@end table
+@section tpad
+
+Temporarily pad video frames.
+
+The filter accepts the following options:
+
+@table @option
+@item start
+Specify number of delay frames before input video stream.
+
+@item stop
+Specify number of padding frames after input video stream.
+Set to -1 to pad indefinitely.
+
+@item start_mode
+Set kind of frames added to beginning of stream.
+Can be either @var{add} or @var{clone}.
+With @var{add} frames of solid-color are added.
+With @var{clone} frames are clones of first frame.
+
+@item stop_mode
+Set kind of frames added to end of stream.
+Can be either @var{add} or @var{clone}.
+With @var{add} frames of solid-color are added.
+With @var{clone} frames are clones of last frame.
+
+@item start_duration, stop_duration
+Specify the duration of the start/stop delay. See
+@ref{time duration syntax,,the Time duration section in the ffmpeg-utils(1)
manual,ffmpeg-utils}
+for the accepted syntax.
+These options override @var{start} and @var{stop}.
+
+@item color
+Specify the color of the padded area. For the syntax of this option,
+check the @ref{color syntax,,"Color" section in the ffmpeg-utils
+manual,ffmpeg-utils}.
+
+The default value of @var{color} is "black".
+@end table
+
@anchor{transpose}
@section transpose
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index c35cd8f422..51e48efc2e 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -383,6 +383,7 @@ OBJS-$(CONFIG_TMIX_FILTER) += vf_mix.o
framesync.o
OBJS-$(CONFIG_TONEMAP_FILTER) += vf_tonemap.o colorspace.o
OBJS-$(CONFIG_TONEMAP_OPENCL_FILTER) += vf_tonemap_opencl.o
colorspace.o opencl.o \
opencl/tonemap.o
opencl/colorspace_common.o
+OBJS-$(CONFIG_TPAD_FILTER) += vf_tpad.o
OBJS-$(CONFIG_TRANSPOSE_FILTER) += vf_transpose.o
OBJS-$(CONFIG_TRANSPOSE_NPP_FILTER) += vf_transpose_npp.o
OBJS-$(CONFIG_TRIM_FILTER) += trim.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index d5a211bda5..6052cb8c3c 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -365,6 +365,7 @@ extern AVFilter ff_vf_tlut2;
extern AVFilter ff_vf_tmix;
extern AVFilter ff_vf_tonemap;
extern AVFilter ff_vf_tonemap_opencl;
+extern AVFilter ff_vf_tpad;
extern AVFilter ff_vf_transpose;
extern AVFilter ff_vf_transpose_npp;
extern AVFilter ff_vf_trim;
diff --git a/libavfilter/vf_tpad.c b/libavfilter/vf_tpad.c
new file mode 100644
index 0000000000..86e063090b
--- /dev/null
+++ b/libavfilter/vf_tpad.c
@@ -0,0 +1,218 @@
+/*
+ * Copyright (c) 2018 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/avassert.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/opt.h"
+#include "avfilter.h"
+#include "audio.h"
+#include "filters.h"
+#include "internal.h"
+#include "formats.h"
+#include "drawutils.h"
+
+typedef struct TPadContext {
+ const AVClass *class;
+ int pad_start;
+ int pad_stop;
+ int start_mode;
+ int stop_mode;
+ int64_t start_duration;
+ int64_t stop_duration;
+ uint8_t rgba_color[4]; ///< color for the padding area
+
+ FFDrawContext draw;
+ FFDrawColor color;
+ int64_t pts;
+ int eof;
+ AVFrame *cache_start;
+ AVFrame *cache_stop;
+} TPadContext;
+
+#define OFFSET(x) offsetof(TPadContext, x)
+#define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption tpad_options[] = {
+ { "start", "set the number of frames to delay input",
OFFSET(pad_start), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, VF },
+ { "stop", "set the number of frames to add after input finished",
OFFSET(pad_stop), AV_OPT_TYPE_INT, {.i64=0}, -1, INT_MAX, VF },
+ { "start_mode", "set the mode of added frames to start",
OFFSET(start_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, VF,
"mode" },
+ { "add", "add solid-color frames", 0,
AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, VF, "mode" },
+ { "clone", "clone first/last frame", 0,
AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, VF, "mode" },
+ { "stop_mode", "set the mode of added frames to end",
OFFSET(stop_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, VF,
"mode" },
+ { "start_duration", "set the duration to delay input",
OFFSET(start_duration), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT64_MAX, VF },
+ { "stop_duration", "set the duration to pad input",
OFFSET(stop_duration), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT64_MAX, VF },
+ { "color", "set the color of the added frames",
OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str="black"}, 0, 0, VF },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(tpad);
+
+static int query_formats(AVFilterContext *ctx)
+{
+ return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
+}
+
+static int activate(AVFilterContext *ctx)
+{
+ AVFilterLink *inlink = ctx->inputs[0];
+ AVFilterLink *outlink = ctx->outputs[0];
+ TPadContext *s = ctx->priv;
+ AVFrame *frame = NULL;
+ int ret, status;
+ int64_t pts;
+
+ FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
+
+ if (s->start_mode == 0 && s->pad_start > 0 &&
ff_outlink_frame_wanted(outlink)) {
+ frame = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!frame)
+ return AVERROR(ENOMEM);
+ ff_fill_rectangle(&s->draw, &s->color,
+ frame->data, frame->linesize,
+ 0, 0, frame->width, frame->height);
+ frame->pts = s->pts;
+ s->pts += av_rescale_q(1, av_inv_q(outlink->frame_rate),
outlink->time_base);
+ s->pad_start--;
+ return ff_filter_frame(outlink, frame);
+ }
+
+ if (s->start_mode == 1 && s->pad_start > 0) {
+ if (!s->cache_start && ff_inlink_queued_frames(inlink)) {
+ s->cache_start = ff_inlink_peek_frame(inlink, 0);
+ } else if (!s->cache_start) {
+ FF_FILTER_FORWARD_WANTED(outlink, inlink);
+ }
+ frame = av_frame_clone(s->cache_start);
+ if (!frame)
+ return AVERROR(ENOMEM);
+ frame->pts = s->pts;
+ s->pts += av_rescale_q(1, av_inv_q(outlink->frame_rate),
outlink->time_base);
+ s->pad_start--;
+ if (s->pad_start == 0)
+ s->cache_start = NULL;
+ return ff_filter_frame(outlink, frame);
+ }
+
+ if (!s->eof && !s->pad_start) {
+ ret = ff_inlink_consume_frame(inlink, &frame);
+ if (ret < 0)
+ return ret;
+ if (ret > 0) {
+ if (s->stop_mode == 1 && s->pad_stop != 0) {
+ av_frame_free(&s->cache_stop);
+ s->cache_stop = av_frame_clone(frame);
+ }
+ frame->pts += s->pts;
+ return ff_filter_frame(outlink, frame);
+ }
+ }
+
+ if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) {
+ if (status == AVERROR_EOF) {
+ if (!s->pad_stop) {
+ ff_outlink_set_status(outlink, status, pts);
+ return 0;
+ }
+ s->eof = 1;
+ s->pts += pts;
+ }
+ }
+
+ if (s->eof) {
+ if (!s->pad_stop) {
+ ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
+ return 0;
+ }
+ if (s->stop_mode == 0) {
+ frame = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!frame)
+ return AVERROR(ENOMEM);
+ ff_fill_rectangle(&s->draw, &s->color,
+ frame->data, frame->linesize,
+ 0, 0, frame->width, frame->height);
+ } else if (s->stop_mode == 1) {
+ frame = av_frame_clone(s->cache_stop);
+ if (!frame)
+ return AVERROR(ENOMEM);
+ }
+ frame->pts = s->pts;
+ s->pts += av_rescale_q(1, av_inv_q(outlink->frame_rate),
outlink->time_base);
+ if (s->pad_stop > 0)
+ s->pad_stop--;
+ return ff_filter_frame(outlink, frame);
+ }
+
+ if (!s->pad_start)
+ FF_FILTER_FORWARD_WANTED(outlink, inlink);
+
+ return FFERROR_NOT_READY;
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ TPadContext *s = ctx->priv;
+
+ ff_draw_init(&s->draw, inlink->format, 0);
+ ff_draw_color(&s->draw, &s->color, s->rgba_color);
+
+ if (s->start_duration)
+ s->pad_start = av_rescale_q(s->start_duration, inlink->frame_rate,
av_inv_q(AV_TIME_BASE_Q));
+ if (s->stop_duration)
+ s->pad_stop = av_rescale_q(s->stop_duration, inlink->frame_rate,
av_inv_q(AV_TIME_BASE_Q));
+
+ return 0;
+}
+
+static void uninit(AVFilterContext *ctx)
+{
+ TPadContext *s = ctx->priv;
+
+ av_frame_free(&s->cache_stop);
+}
+
+static const AVFilterPad tpad_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad tpad_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_tpad = {
+ .name = "tpad",
+ .description = NULL_IF_CONFIG_SMALL("Temporarily pad video frames."),
+ .priv_size = sizeof(TPadContext),
+ .priv_class = &tpad_class,
+ .query_formats = query_formats,
+ .activate = activate,
+ .uninit = uninit,
+ .inputs = tpad_inputs,
+ .outputs = tpad_outputs,
+};
--
2.17.1
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