/* * 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/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" enum PadMode { MODE_ADD = 0, MODE_CLONE, NB_MODE }; 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=MODE_ADD}, 0, NB_MODE-1, VF, "mode" }, { "add", "add solid-color frames", 0, AV_OPT_TYPE_CONST, {.i64=MODE_ADD}, 0, 0, VF, "mode" }, { "clone", "clone first/last frame", 0, AV_OPT_TYPE_CONST, {.i64=MODE_CLONE}, 0, 0, VF, "mode" }, { "stop_mode", "set the mode of added frames to end", OFFSET(stop_mode), AV_OPT_TYPE_INT, {.i64=MODE_ADD}, 0, NB_MODE-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 duration, pts; FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink); if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) { if (status == AVERROR_EOF) { pts = av_rescale_q(pts, inlink->time_base, outlink->time_base); if (!s->pad_stop && !s->pad_start) { ff_outlink_set_status(outlink, status, pts); return 0; } s->eof = 1; s->pts += pts; } } if (s->start_mode == MODE_ADD && 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); duration = av_rescale_q(1, av_inv_q(outlink->frame_rate), outlink->time_base); frame->pts = s->pts; frame->duration = duration; s->pts += duration; s->pad_start--; return ff_filter_frame(outlink, frame); } if (s->start_mode == MODE_CLONE && s->pad_start > 0) { if (s->eof) { ff_outlink_set_status(outlink, AVERROR_EOF, 0); return 0; } else 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); duration = av_rescale_q(1, av_inv_q(outlink->frame_rate), outlink->time_base); frame->pts = s->pts; frame->duration = duration; s->pts += duration; 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 == MODE_CLONE && 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) { if (!s->pad_stop) { ff_outlink_set_status(outlink, AVERROR_EOF, s->pts); return 0; } if (s->stop_mode == MODE_ADD) { 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 == MODE_CLONE) { if (!s->cache_stop) { s->pad_stop = 0; ff_outlink_set_status(outlink, AVERROR_EOF, s->pts); return 0; } frame = av_frame_clone(s->cache_stop); if (!frame) return AVERROR(ENOMEM); } duration = av_rescale_q(1, av_inv_q(outlink->frame_rate), outlink->time_base); frame->pts = s->pts; frame->duration = duration; s->pts += duration; 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 av_cold 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, }, }; static const AVFilterPad tpad_outputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, }, }; const AVFilter ff_vf_tpad = { .name = "tpad", .description = NULL_IF_CONFIG_SMALL("Temporarily pad video frames."), .priv_size = sizeof(TPadContext), .priv_class = &tpad_class, .activate = activate, .uninit = uninit, FILTER_INPUTS(tpad_inputs), FILTER_OUTPUTS(tpad_outputs), FILTER_QUERY_FUNC(query_formats), };