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-rw-r--r--libavfilter/vf_il.c230
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diff --git a/libavfilter/vf_il.c b/libavfilter/vf_il.c
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+/*
+ * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2013 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
+ */
+
+/**
+ * @file
+ * (de)interleave fields filter
+ */
+
+#include "libavutil/opt.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/pixdesc.h"
+#include "avfilter.h"
+#include "internal.h"
+
+enum FilterMode {
+ MODE_NONE,
+ MODE_INTERLEAVE,
+ MODE_DEINTERLEAVE
+};
+
+typedef struct {
+ const AVClass *class;
+ enum FilterMode luma_mode, chroma_mode, alpha_mode;
+ int luma_swap, chroma_swap, alpha_swap;
+ int nb_planes;
+ int linesize[4], chroma_height;
+ int has_alpha;
+} IlContext;
+
+#define OFFSET(x) offsetof(IlContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption il_options[] = {
+ {"luma_mode", "select luma mode", OFFSET(luma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "luma_mode"},
+ {"l", "select luma mode", OFFSET(luma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "luma_mode"},
+ {"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "luma_mode"},
+ {"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
+ {"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
+ {"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
+ {"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
+ {"chroma_mode", "select chroma mode", OFFSET(chroma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "chroma_mode"},
+ {"c", "select chroma mode", OFFSET(chroma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "chroma_mode"},
+ {"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "chroma_mode"},
+ {"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
+ {"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
+ {"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
+ {"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
+ {"alpha_mode", "select alpha mode", OFFSET(alpha_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "alpha_mode"},
+ {"a", "select alpha mode", OFFSET(alpha_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "alpha_mode"},
+ {"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "alpha_mode"},
+ {"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
+ {"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
+ {"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
+ {"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
+ {"luma_swap", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
+ {"ls", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
+ {"chroma_swap", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
+ {"cs", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
+ {"alpha_swap", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
+ {"as", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
+ {NULL}
+};
+
+AVFILTER_DEFINE_CLASS(il);
+
+static av_cold int init(AVFilterContext *ctx, const char *args)
+{
+ IlContext *il = ctx->priv;
+ int ret;
+
+ il->class = &il_class;
+ av_opt_set_defaults(il);
+
+ if ((ret = av_set_options_string(il, args, "=", ":")) < 0)
+ return ret;
+
+ return 0;
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+ AVFilterFormats *formats = NULL;
+ int fmt;
+
+ for (fmt = 0; fmt < AV_PIX_FMT_NB; fmt++) {
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
+ if (!(desc->flags & PIX_FMT_PAL) && !(desc->flags & PIX_FMT_HWACCEL))
+ ff_add_format(&formats, fmt);
+ }
+
+ ff_set_common_formats(ctx, formats);
+ return 0;
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+ IlContext *il = inlink->dst->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ int i, ret;
+
+ for (i = 0; i < desc->nb_components; i++)
+ il->nb_planes = FFMAX(il->nb_planes, desc->comp[i].plane);
+ il->nb_planes++;
+
+ il->has_alpha = !!(desc->flags & PIX_FMT_ALPHA);
+ if ((ret = av_image_fill_linesizes(il->linesize, inlink->format, inlink->w)) < 0)
+ return ret;
+
+ il->chroma_height = inlink->h >> desc->log2_chroma_h;
+
+ return 0;
+}
+
+static void interleave(uint8_t *dst, uint8_t *src, int w, int h,
+ int dst_linesize, int src_linesize,
+ enum FilterMode mode, int swap)
+{
+ const int a = swap;
+ const int b = 1 - a;
+ const int m = h >> 1;
+ int y;
+
+ switch (mode) {
+ case MODE_DEINTERLEAVE:
+ for (y = 0; y < m; y++) {
+ memcpy(dst + dst_linesize * y , src + src_linesize * (y * 2 + a), w);
+ memcpy(dst + dst_linesize * (y + m), src + src_linesize * (y * 2 + b), w);
+ }
+ break;
+ case MODE_NONE:
+ for (y = 0; y < m; y++) {
+ memcpy(dst + dst_linesize * y * 2 , src + src_linesize * (y * 2 + a), w);
+ memcpy(dst + dst_linesize * (y * 2 + 1), src + src_linesize * (y * 2 + b), w);
+ }
+ break;
+ case MODE_INTERLEAVE:
+ for (y = 0; y < m; y++) {
+ memcpy(dst + dst_linesize * (y * 2 + a), src + src_linesize * y , w);
+ memcpy(dst + dst_linesize * (y * 2 + b), src + src_linesize * (y + m), w);
+ }
+ break;
+ }
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
+{
+ IlContext *il = inlink->dst->priv;
+ AVFilterLink *outlink = inlink->dst->outputs[0];
+ AVFrame *out;
+ int ret, comp;
+
+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out) {
+ av_frame_free(&inpicref);
+ return AVERROR(ENOMEM);
+ }
+ av_frame_copy_props(out, inpicref);
+
+ interleave(out->data[0], inpicref->data[0],
+ il->linesize[0], inlink->h,
+ out->linesize[0], inpicref->linesize[0],
+ il->luma_mode, il->luma_swap);
+
+ for (comp = 1; comp < (il->nb_planes - il->has_alpha); comp++) {
+ interleave(out->data[comp], inpicref->data[comp],
+ il->linesize[comp], il->chroma_height,
+ out->linesize[comp], inpicref->linesize[comp],
+ il->chroma_mode, il->chroma_swap);
+ }
+
+ if (il->has_alpha) {
+ int comp = il->nb_planes - 1;
+ interleave(out->data[comp], inpicref->data[comp],
+ il->linesize[comp], inlink->h,
+ out->linesize[comp], inpicref->linesize[comp],
+ il->alpha_mode, il->alpha_swap);
+ }
+
+ ret = ff_filter_frame(outlink, out);
+ av_frame_free(&inpicref);
+ return ret;
+}
+
+static const AVFilterPad inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .get_video_buffer = ff_null_get_video_buffer,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+AVFilter avfilter_vf_il = {
+ .name = "il",
+ .description = NULL_IF_CONFIG_SMALL("Deinterleave or interleave fields."),
+ .priv_size = sizeof(IlContext),
+ .init = init,
+ .query_formats = query_formats,
+ .inputs = inputs,
+ .outputs = outputs,
+ .priv_class = &il_class,
+};
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