313 lines
9.1 KiB
C
313 lines
9.1 KiB
C
/*
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* Copyright (c) 2016 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/imgutils.h"
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#include "libavutil/internal.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "video.h"
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typedef struct FieldHintContext {
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const AVClass *class;
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char *hint_file_str;
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FILE *hint;
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int mode;
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AVFrame *frame[3];
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int64_t line;
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int nb_planes;
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int eof;
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int planewidth[4];
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int planeheight[4];
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} FieldHintContext;
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#define OFFSET(x) offsetof(FieldHintContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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static const AVOption fieldhint_options[] = {
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{ "hint", "set hint file", OFFSET(hint_file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "mode", "set hint mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "mode" },
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{ "absolute", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mode" },
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{ "relative", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mode" },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(fieldhint);
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static av_cold int init(AVFilterContext *ctx)
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{
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FieldHintContext *s = ctx->priv;
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int ret;
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if (!s->hint_file_str) {
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av_log(ctx, AV_LOG_ERROR, "Hint file must be set.\n");
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return AVERROR(EINVAL);
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}
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s->hint = fopen(s->hint_file_str, "r");
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if (!s->hint) {
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ret = AVERROR(errno);
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av_log(ctx, AV_LOG_ERROR, "%s: %s\n", s->hint_file_str, av_err2str(ret));
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return ret;
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}
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return 0;
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}
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static int query_formats(AVFilterContext *ctx)
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{
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AVFilterFormats *pix_fmts = NULL;
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int fmt, ret;
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for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
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if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
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desc->flags & AV_PIX_FMT_FLAG_PAL ||
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desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) &&
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(ret = ff_add_format(&pix_fmts, fmt)) < 0)
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return ret;
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}
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return ff_set_common_formats(ctx, pix_fmts);
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}
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static int config_input(AVFilterLink *inlink)
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{
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FieldHintContext *s = inlink->dst->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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int ret;
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if ((ret = av_image_fill_linesizes(s->planewidth, inlink->format, inlink->w)) < 0)
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return ret;
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s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
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s->planeheight[0] = s->planeheight[3] = inlink->h;
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s->nb_planes = av_pix_fmt_count_planes(inlink->format);
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return 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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FieldHintContext *s = ctx->priv;
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AVFrame *out, *top, *bottom;
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char buf[1024] = { 0 };
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int64_t tf, bf;
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int tfactor = 0, bfactor = 1;
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char hint = '=', field = '=';
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int p;
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av_frame_free(&s->frame[0]);
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s->frame[0] = s->frame[1];
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s->frame[1] = s->frame[2];
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s->frame[2] = in;
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if (!s->frame[1])
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return 0;
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else if (!s->frame[0]) {
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s->frame[0] = av_frame_clone(s->frame[1]);
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if (!s->frame[0])
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return AVERROR(ENOMEM);
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}
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while (1) {
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if (fgets(buf, sizeof(buf)-1, s->hint)) {
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s->line++;
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if (buf[0] == '#' || buf[0] == ';') {
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continue;
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} else if (sscanf(buf, "%"PRId64",%"PRId64" %c %c", &tf, &bf, &hint, &field) == 4) {
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;
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} else if (sscanf(buf, "%"PRId64",%"PRId64" %c", &tf, &bf, &hint) == 3) {
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;
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} else if (sscanf(buf, "%"PRId64",%"PRId64"", &tf, &bf) == 2) {
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;
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} else {
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av_log(ctx, AV_LOG_ERROR, "Invalid entry at line %"PRId64".\n", s->line);
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return AVERROR_INVALIDDATA;
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}
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switch (s->mode) {
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case 0:
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if (tf > outlink->frame_count_in + 1 || tf < FFMAX(0, outlink->frame_count_in - 1) ||
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bf > outlink->frame_count_in + 1 || bf < FFMAX(0, outlink->frame_count_in - 1)) {
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av_log(ctx, AV_LOG_ERROR, "Out of range frames %"PRId64" and/or %"PRId64" on line %"PRId64" for %"PRId64". input frame.\n", tf, bf, s->line, inlink->frame_count_out);
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return AVERROR_INVALIDDATA;
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}
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break;
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case 1:
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if (tf > 1 || tf < -1 ||
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bf > 1 || bf < -1) {
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av_log(ctx, AV_LOG_ERROR, "Out of range %"PRId64" and/or %"PRId64" on line %"PRId64" for %"PRId64". input frame.\n", tf, bf, s->line, inlink->frame_count_out);
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return AVERROR_INVALIDDATA;
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}
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};
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break;
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} else {
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av_log(ctx, AV_LOG_ERROR, "Missing entry for %"PRId64". input frame.\n", inlink->frame_count_out);
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return AVERROR_INVALIDDATA;
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}
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}
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out)
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return AVERROR(ENOMEM);
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av_frame_copy_props(out, s->frame[1]);
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switch (s->mode) {
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case 0:
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top = s->frame[tf - outlink->frame_count_in + 1];
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bottom = s->frame[bf - outlink->frame_count_in + 1];
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break;
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case 1:
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top = s->frame[1 + tf];
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bottom = s->frame[1 + bf];
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break;
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default:
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av_assert0(0);
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}
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switch (field) {
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case 'b':
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tfactor = 1;
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top = bottom;
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break;
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case 't':
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bfactor = 0;
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bottom = top;
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break;
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case '=':
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break;
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default:
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av_log(ctx, AV_LOG_ERROR, "Invalid field: %c.\n", field);
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av_frame_free(&out);
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return AVERROR(EINVAL);
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}
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switch (hint) {
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case '+':
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out->interlaced_frame = 1;
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break;
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case '-':
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out->interlaced_frame = 0;
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break;
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case '=':
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break;
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case 'b':
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tfactor = 1;
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top = bottom;
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break;
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case 't':
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bfactor = 0;
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bottom = top;
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break;
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default:
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av_log(ctx, AV_LOG_ERROR, "Invalid hint: %c.\n", hint);
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av_frame_free(&out);
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return AVERROR(EINVAL);
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}
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for (p = 0; p < s->nb_planes; p++) {
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av_image_copy_plane(out->data[p],
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out->linesize[p] * 2,
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top->data[p] + tfactor * top->linesize[p],
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top->linesize[p] * 2,
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s->planewidth[p],
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(s->planeheight[p] + 1) / 2);
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av_image_copy_plane(out->data[p] + out->linesize[p],
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out->linesize[p] * 2,
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bottom->data[p] + bfactor * bottom->linesize[p],
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bottom->linesize[p] * 2,
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s->planewidth[p],
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(s->planeheight[p] + 1) / 2);
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}
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return ff_filter_frame(outlink, out);
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}
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static int request_frame(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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FieldHintContext *s = ctx->priv;
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int ret;
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if (s->eof)
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return AVERROR_EOF;
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ret = ff_request_frame(ctx->inputs[0]);
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if (ret == AVERROR_EOF && s->frame[2]) {
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AVFrame *next = av_frame_clone(s->frame[2]);
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if (!next)
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return AVERROR(ENOMEM);
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ret = filter_frame(ctx->inputs[0], next);
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s->eof = 1;
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}
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return ret;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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FieldHintContext *s = ctx->priv;
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if (s->hint)
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fclose(s->hint);
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s->hint = NULL;
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av_frame_free(&s->frame[0]);
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av_frame_free(&s->frame[1]);
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av_frame_free(&s->frame[2]);
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}
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static const AVFilterPad 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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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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static const AVFilterPad outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.request_frame = request_frame,
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},
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{ NULL }
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};
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AVFilter ff_vf_fieldhint = {
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.name = "fieldhint",
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.description = NULL_IF_CONFIG_SMALL("Field matching using hints."),
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.priv_size = sizeof(FieldHintContext),
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.priv_class = &fieldhint_class,
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.init = init,
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.uninit = uninit,
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.query_formats = query_formats,
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.inputs = inputs,
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.outputs = outputs,
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};
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