213 lines
8.4 KiB
C
213 lines
8.4 KiB
C
/*
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* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
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* Copyright (c) 2013 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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/**
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* @file
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* (de)interleave fields filter
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*/
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#include "libavutil/opt.h"
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#include "libavutil/imgutils.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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enum FilterMode {
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MODE_NONE,
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MODE_INTERLEAVE,
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MODE_DEINTERLEAVE
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};
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typedef struct {
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const AVClass *class;
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enum FilterMode luma_mode, chroma_mode, alpha_mode;
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int luma_swap, chroma_swap, alpha_swap;
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int nb_planes;
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int linesize[4], chroma_height;
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int has_alpha;
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} IlContext;
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#define OFFSET(x) offsetof(IlContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption il_options[] = {
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{"luma_mode", "select luma mode", OFFSET(luma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "luma_mode"},
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{"l", "select luma mode", OFFSET(luma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "luma_mode"},
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{"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "luma_mode"},
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{"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
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{"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
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{"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
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{"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
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{"chroma_mode", "select chroma mode", OFFSET(chroma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "chroma_mode"},
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{"c", "select chroma mode", OFFSET(chroma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "chroma_mode"},
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{"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "chroma_mode"},
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{"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
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{"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
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{"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
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{"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
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{"alpha_mode", "select alpha mode", OFFSET(alpha_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "alpha_mode"},
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{"a", "select alpha mode", OFFSET(alpha_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "alpha_mode"},
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{"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "alpha_mode"},
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{"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
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{"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
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{"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
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{"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
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{"luma_swap", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
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{"ls", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
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{"chroma_swap", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
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{"cs", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
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{"alpha_swap", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
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{"as", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
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{NULL}
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};
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AVFILTER_DEFINE_CLASS(il);
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static int query_formats(AVFilterContext *ctx)
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{
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AVFilterFormats *formats = NULL;
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int fmt;
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for (fmt = 0; fmt < AV_PIX_FMT_NB; 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_PAL) && !(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
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ff_add_format(&formats, fmt);
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}
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ff_set_common_formats(ctx, formats);
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return 0;
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}
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static int config_input(AVFilterLink *inlink)
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{
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IlContext *il = 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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il->nb_planes = av_pix_fmt_count_planes(inlink->format);
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il->has_alpha = !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA);
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if ((ret = av_image_fill_linesizes(il->linesize, inlink->format, inlink->w)) < 0)
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return ret;
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il->chroma_height = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
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return 0;
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}
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static void interleave(uint8_t *dst, uint8_t *src, int w, int h,
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int dst_linesize, int src_linesize,
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enum FilterMode mode, int swap)
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{
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const int a = swap;
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const int b = 1 - a;
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const int m = h >> 1;
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int y;
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switch (mode) {
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case MODE_DEINTERLEAVE:
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for (y = 0; y < m; y++) {
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memcpy(dst + dst_linesize * y , src + src_linesize * (y * 2 + a), w);
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memcpy(dst + dst_linesize * (y + m), src + src_linesize * (y * 2 + b), w);
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}
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break;
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case MODE_NONE:
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for (y = 0; y < m; y++) {
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memcpy(dst + dst_linesize * y * 2 , src + src_linesize * (y * 2 + a), w);
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memcpy(dst + dst_linesize * (y * 2 + 1), src + src_linesize * (y * 2 + b), w);
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}
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break;
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case MODE_INTERLEAVE:
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for (y = 0; y < m; y++) {
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memcpy(dst + dst_linesize * (y * 2 + a), src + src_linesize * y , w);
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memcpy(dst + dst_linesize * (y * 2 + b), src + src_linesize * (y + m), w);
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}
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break;
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}
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
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{
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IlContext *il = inlink->dst->priv;
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AVFilterLink *outlink = inlink->dst->outputs[0];
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AVFrame *out;
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int comp;
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out) {
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av_frame_free(&inpicref);
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return AVERROR(ENOMEM);
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}
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av_frame_copy_props(out, inpicref);
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interleave(out->data[0], inpicref->data[0],
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il->linesize[0], inlink->h,
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out->linesize[0], inpicref->linesize[0],
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il->luma_mode, il->luma_swap);
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for (comp = 1; comp < (il->nb_planes - il->has_alpha); comp++) {
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interleave(out->data[comp], inpicref->data[comp],
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il->linesize[comp], il->chroma_height,
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out->linesize[comp], inpicref->linesize[comp],
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il->chroma_mode, il->chroma_swap);
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}
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if (il->has_alpha) {
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comp = il->nb_planes - 1;
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interleave(out->data[comp], inpicref->data[comp],
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il->linesize[comp], inlink->h,
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out->linesize[comp], inpicref->linesize[comp],
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il->alpha_mode, il->alpha_swap);
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}
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av_frame_free(&inpicref);
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return ff_filter_frame(outlink, out);
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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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.filter_frame = filter_frame,
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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 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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AVFilter avfilter_vf_il = {
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.name = "il",
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.description = NULL_IF_CONFIG_SMALL("Deinterleave or interleave fields."),
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.priv_size = sizeof(IlContext),
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.query_formats = query_formats,
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.inputs = inputs,
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.outputs = outputs,
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.priv_class = &il_class,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
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};
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