2018-10-30 08:33:12 +00:00
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/*
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* Copyright (c) 2018 Paul B Mahol
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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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#include "libavutil/avassert.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "audio.h"
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#include "filters.h"
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#include "internal.h"
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#include "formats.h"
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#include "drawutils.h"
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typedef struct TPadContext {
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const AVClass *class;
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int pad_start;
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int pad_stop;
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int start_mode;
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int stop_mode;
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int64_t start_duration;
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int64_t stop_duration;
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uint8_t rgba_color[4]; ///< color for the padding area
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FFDrawContext draw;
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FFDrawColor color;
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int64_t pts;
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int eof;
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AVFrame *cache_start;
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AVFrame *cache_stop;
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} TPadContext;
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#define OFFSET(x) offsetof(TPadContext, x)
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#define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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static const AVOption tpad_options[] = {
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{ "start", "set the number of frames to delay input", OFFSET(pad_start), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, VF },
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{ "stop", "set the number of frames to add after input finished", OFFSET(pad_stop), AV_OPT_TYPE_INT, {.i64=0}, -1, INT_MAX, VF },
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{ "start_mode", "set the mode of added frames to start", OFFSET(start_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, VF, "mode" },
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{ "add", "add solid-color frames", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, VF, "mode" },
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{ "clone", "clone first/last frame", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, VF, "mode" },
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{ "stop_mode", "set the mode of added frames to end", OFFSET(stop_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, VF, "mode" },
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{ "start_duration", "set the duration to delay input", OFFSET(start_duration), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT64_MAX, VF },
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{ "stop_duration", "set the duration to pad input", OFFSET(stop_duration), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT64_MAX, VF },
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{ "color", "set the color of the added frames", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str="black"}, 0, 0, VF },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(tpad);
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static int query_formats(AVFilterContext *ctx)
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{
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return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
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}
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static int activate(AVFilterContext *ctx)
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{
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AVFilterLink *inlink = ctx->inputs[0];
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AVFilterLink *outlink = ctx->outputs[0];
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TPadContext *s = ctx->priv;
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AVFrame *frame = NULL;
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int ret, status;
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int64_t pts;
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FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
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if (s->start_mode == 0 && s->pad_start > 0 && ff_outlink_frame_wanted(outlink)) {
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frame = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!frame)
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return AVERROR(ENOMEM);
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ff_fill_rectangle(&s->draw, &s->color,
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frame->data, frame->linesize,
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0, 0, frame->width, frame->height);
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frame->pts = s->pts;
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s->pts += av_rescale_q(1, av_inv_q(outlink->frame_rate), outlink->time_base);
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s->pad_start--;
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return ff_filter_frame(outlink, frame);
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}
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if (s->start_mode == 1 && s->pad_start > 0) {
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if (!s->cache_start && ff_inlink_queued_frames(inlink)) {
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s->cache_start = ff_inlink_peek_frame(inlink, 0);
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} else if (!s->cache_start) {
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FF_FILTER_FORWARD_WANTED(outlink, inlink);
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}
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frame = av_frame_clone(s->cache_start);
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if (!frame)
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return AVERROR(ENOMEM);
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frame->pts = s->pts;
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s->pts += av_rescale_q(1, av_inv_q(outlink->frame_rate), outlink->time_base);
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s->pad_start--;
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if (s->pad_start == 0)
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s->cache_start = NULL;
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return ff_filter_frame(outlink, frame);
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}
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if (!s->eof && !s->pad_start) {
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ret = ff_inlink_consume_frame(inlink, &frame);
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if (ret < 0)
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return ret;
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if (ret > 0) {
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if (s->stop_mode == 1 && s->pad_stop != 0) {
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av_frame_free(&s->cache_stop);
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s->cache_stop = av_frame_clone(frame);
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}
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frame->pts += s->pts;
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return ff_filter_frame(outlink, frame);
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}
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}
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if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) {
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if (status == AVERROR_EOF) {
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if (!s->pad_stop) {
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ff_outlink_set_status(outlink, status, pts);
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return 0;
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}
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s->eof = 1;
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s->pts += pts;
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}
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}
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if (s->eof) {
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if (!s->pad_stop) {
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ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
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return 0;
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}
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if (s->stop_mode == 0) {
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frame = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!frame)
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return AVERROR(ENOMEM);
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ff_fill_rectangle(&s->draw, &s->color,
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frame->data, frame->linesize,
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0, 0, frame->width, frame->height);
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} else if (s->stop_mode == 1) {
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frame = av_frame_clone(s->cache_stop);
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if (!frame)
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return AVERROR(ENOMEM);
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}
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frame->pts = s->pts;
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s->pts += av_rescale_q(1, av_inv_q(outlink->frame_rate), outlink->time_base);
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if (s->pad_stop > 0)
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s->pad_stop--;
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return ff_filter_frame(outlink, frame);
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}
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if (!s->pad_start)
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FF_FILTER_FORWARD_WANTED(outlink, inlink);
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return FFERROR_NOT_READY;
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}
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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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TPadContext *s = ctx->priv;
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ff_draw_init(&s->draw, inlink->format, 0);
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ff_draw_color(&s->draw, &s->color, s->rgba_color);
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if (s->start_duration)
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s->pad_start = av_rescale_q(s->start_duration, inlink->frame_rate, av_inv_q(AV_TIME_BASE_Q));
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if (s->stop_duration)
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s->pad_stop = av_rescale_q(s->stop_duration, inlink->frame_rate, av_inv_q(AV_TIME_BASE_Q));
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return 0;
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}
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2019-10-03 10:09:07 +00:00
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static av_cold void uninit(AVFilterContext *ctx)
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2018-10-30 08:33:12 +00:00
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{
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TPadContext *s = ctx->priv;
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av_frame_free(&s->cache_stop);
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}
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static const AVFilterPad tpad_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_input,
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},
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{ NULL }
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};
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static const AVFilterPad tpad_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{ NULL }
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};
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2021-04-19 16:33:56 +00:00
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const AVFilter ff_vf_tpad = {
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2018-10-30 08:33:12 +00:00
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.name = "tpad",
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.description = NULL_IF_CONFIG_SMALL("Temporarily pad video frames."),
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.priv_size = sizeof(TPadContext),
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.priv_class = &tpad_class,
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.query_formats = query_formats,
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.activate = activate,
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.uninit = uninit,
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.inputs = tpad_inputs,
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.outputs = tpad_outputs,
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};
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