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167 lines
5.1 KiB
167 lines
5.1 KiB
/* |
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* Copyright (c) 2019 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/avstring.h" |
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#include "libavutil/common.h" |
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#include "libavutil/internal.h" |
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#include "libavutil/opt.h" |
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#include "avfilter.h" |
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#include "filters.h" |
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#include "video.h" |
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typedef struct FreezeFramesContext { |
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const AVClass *class; |
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int64_t first, last, replace; |
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AVFrame *replace_frame; |
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} FreezeFramesContext; |
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#define OFFSET(x) offsetof(FreezeFramesContext, x) |
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#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM) |
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static const AVOption freezeframes_options[] = { |
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{ "first", "set first frame to freeze", OFFSET(first), AV_OPT_TYPE_INT64, {.i64=0}, 0, INT64_MAX, FLAGS }, |
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{ "last", "set last frame to freeze", OFFSET(last), AV_OPT_TYPE_INT64, {.i64=0}, 0, INT64_MAX, FLAGS }, |
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{ "replace", "set frame to replace", OFFSET(replace), AV_OPT_TYPE_INT64, {.i64=0}, 0, INT64_MAX, FLAGS }, |
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{ NULL }, |
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}; |
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AVFILTER_DEFINE_CLASS(freezeframes); |
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static int config_output(AVFilterLink *outlink) |
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{ |
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AVFilterContext *ctx = outlink->src; |
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AVFilterLink *sourcelink = ctx->inputs[0]; |
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AVFilterLink *replacelink = ctx->inputs[1]; |
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FilterLink *il = ff_filter_link(sourcelink); |
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FilterLink *ol = ff_filter_link(outlink); |
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if (sourcelink->w != replacelink->w || sourcelink->h != replacelink->h) { |
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av_log(ctx, AV_LOG_ERROR, |
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"Input frame sizes do not match (%dx%d vs %dx%d).\n", |
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sourcelink->w, sourcelink->h, |
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replacelink->w, replacelink->h); |
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return AVERROR(EINVAL); |
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} |
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outlink->w = sourcelink->w; |
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outlink->h = sourcelink->h; |
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outlink->time_base = sourcelink->time_base; |
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outlink->sample_aspect_ratio = sourcelink->sample_aspect_ratio; |
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ol->frame_rate = il->frame_rate; |
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return 0; |
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} |
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static int activate(AVFilterContext *ctx) |
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{ |
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FilterLink *inl0 = ff_filter_link(ctx->inputs[0]); |
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FilterLink *inl1 = ff_filter_link(ctx->inputs[1]); |
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AVFilterLink *outlink = ctx->outputs[0]; |
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FreezeFramesContext *s = ctx->priv; |
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AVFrame *frame = NULL; |
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int drop = inl0->frame_count_out >= s->first && |
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inl0->frame_count_out <= s->last; |
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int replace = inl1->frame_count_out == s->replace; |
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int ret; |
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FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, ctx); |
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if (drop && s->replace_frame) { |
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ret = ff_inlink_consume_frame(ctx->inputs[0], &frame); |
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if (ret < 0) |
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return ret; |
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if (frame) { |
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int64_t dropped_pts = frame->pts; |
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av_frame_free(&frame); |
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frame = av_frame_clone(s->replace_frame); |
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if (!frame) |
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return AVERROR(ENOMEM); |
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frame->pts = dropped_pts; |
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return ff_filter_frame(outlink, frame); |
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} |
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} else if (!drop) { |
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ret = ff_inlink_consume_frame(ctx->inputs[0], &frame); |
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if (ret < 0) |
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return ret; |
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if (frame) |
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return ff_filter_frame(outlink, frame); |
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} |
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ret = ff_inlink_consume_frame(ctx->inputs[1], &frame); |
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if (ret < 0) |
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return ret; |
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if (replace && frame) { |
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s->replace_frame = frame; |
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} else if (frame) { |
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av_frame_free(&frame); |
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} |
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FF_FILTER_FORWARD_STATUS(ctx->inputs[0], outlink); |
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FF_FILTER_FORWARD_STATUS(ctx->inputs[1], outlink); |
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if (!drop || (drop && s->replace_frame)) |
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FF_FILTER_FORWARD_WANTED(outlink, ctx->inputs[0]); |
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if (!s->replace_frame) |
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FF_FILTER_FORWARD_WANTED(outlink, ctx->inputs[1]); |
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return FFERROR_NOT_READY; |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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FreezeFramesContext *s = ctx->priv; |
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av_frame_free(&s->replace_frame); |
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} |
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static const AVFilterPad freezeframes_inputs[] = { |
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{ |
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.name = "source", |
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.type = AVMEDIA_TYPE_VIDEO, |
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}, |
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{ |
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.name = "replace", |
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.type = AVMEDIA_TYPE_VIDEO, |
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}, |
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}; |
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static const AVFilterPad freezeframes_outputs[] = { |
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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_output, |
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}, |
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}; |
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const AVFilter ff_vf_freezeframes = { |
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.name = "freezeframes", |
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.description = NULL_IF_CONFIG_SMALL("Freeze video frames."), |
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.priv_size = sizeof(FreezeFramesContext), |
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.priv_class = &freezeframes_class, |
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FILTER_INPUTS(freezeframes_inputs), |
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FILTER_OUTPUTS(freezeframes_outputs), |
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.activate = activate, |
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.uninit = uninit, |
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};
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