| /* |
| * 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; |
| int luma_mode, chroma_mode, alpha_mode; ///<FilterMode |
| 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_BOOL, {.i64=0}, 0, 1, FLAGS}, |
| {"ls", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS}, |
| {"chroma_swap", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS}, |
| {"cs", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS}, |
| {"alpha_swap", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS}, |
| {"as", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS}, |
| {NULL} |
| }; |
| |
| AVFILTER_DEFINE_CLASS(il); |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| AVFilterFormats *formats = NULL; |
| int fmt, ret; |
| |
| 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) && |
| (ret = ff_add_format(&formats, fmt)) < 0) |
| return ret; |
| } |
| |
| return ff_set_common_formats(ctx, formats); |
| } |
| |
| static int config_input(AVFilterLink *inlink) |
| { |
| IlContext *s = inlink->dst->priv; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| int ret; |
| |
| s->nb_planes = av_pix_fmt_count_planes(inlink->format); |
| |
| s->has_alpha = !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA); |
| if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0) |
| return ret; |
| |
| s->chroma_height = AV_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 *s = 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], |
| s->linesize[0], inlink->h, |
| out->linesize[0], inpicref->linesize[0], |
| s->luma_mode, s->luma_swap); |
| |
| for (comp = 1; comp < (s->nb_planes - s->has_alpha); comp++) { |
| interleave(out->data[comp], inpicref->data[comp], |
| s->linesize[comp], s->chroma_height, |
| out->linesize[comp], inpicref->linesize[comp], |
| s->chroma_mode, s->chroma_swap); |
| } |
| |
| if (s->has_alpha) { |
| comp = s->nb_planes - 1; |
| interleave(out->data[comp], inpicref->data[comp], |
| s->linesize[comp], inlink->h, |
| out->linesize[comp], inpicref->linesize[comp], |
| s->alpha_mode, s->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, |
| }; |