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Diffstat (limited to 'libavfilter/vf_il.c')
-rw-r--r-- | libavfilter/vf_il.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/libavfilter/vf_il.c b/libavfilter/vf_il.c new file mode 100644 index 0000000..b19fea1 --- /dev/null +++ b/libavfilter/vf_il.c @@ -0,0 +1,212 @@ +/* + * 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 int query_formats(AVFilterContext *ctx) +{ + AVFilterFormats *formats = NULL; + int fmt; + + for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) { + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt); + if (!(desc->flags & AV_PIX_FMT_FLAG_PAL) && !(desc->flags & AV_PIX_FMT_FLAG_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 ret; + + il->nb_planes = av_pix_fmt_count_planes(inlink->format); + + il->has_alpha = !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA); + if ((ret = av_image_fill_linesizes(il->linesize, inlink->format, inlink->w)) < 0) + return ret; + + il->chroma_height = FF_CEIL_RSHIFT(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 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) { + 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); + } + + av_frame_free(&inpicref); + return ff_filter_frame(outlink, out); +} + +static const AVFilterPad inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .filter_frame = filter_frame, + .config_props = config_input, + }, + { NULL } +}; + +static const AVFilterPad outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +AVFilter ff_vf_il = { + .name = "il", + .description = NULL_IF_CONFIG_SMALL("Deinterleave or interleave fields."), + .priv_size = sizeof(IlContext), + .query_formats = query_formats, + .inputs = inputs, + .outputs = outputs, + .priv_class = &il_class, + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, +}; |