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198 lines
8.3 KiB
198 lines
8.3 KiB
/* |
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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 "filters.h" |
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#include "formats.h" |
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#include "video.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 IlContext { |
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const AVClass *class; |
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int luma_mode, chroma_mode, alpha_mode; ///<FilterMode |
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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|AV_OPT_FLAG_RUNTIME_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, .unit = "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, .unit = "luma_mode"}, |
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{"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, .unit = "luma_mode"}, |
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{"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, .unit = "luma_mode"}, |
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{"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, .unit = "luma_mode"}, |
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{"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, .unit = "luma_mode"}, |
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{"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, .unit = "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, .unit = "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, .unit = "chroma_mode"}, |
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{"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, .unit = "chroma_mode"}, |
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{"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, .unit = "chroma_mode"}, |
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{"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, .unit = "chroma_mode"}, |
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{"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, .unit = "chroma_mode"}, |
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{"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, .unit = "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, .unit = "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, .unit = "alpha_mode"}, |
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{"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, .unit = "alpha_mode"}, |
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{"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, .unit = "alpha_mode"}, |
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{"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, .unit = "alpha_mode"}, |
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{"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, .unit = "alpha_mode"}, |
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{"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, .unit = "alpha_mode"}, |
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{"luma_swap", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS}, |
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{"ls", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS}, |
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{"chroma_swap", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS}, |
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{"cs", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS}, |
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{"alpha_swap", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS}, |
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{"as", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_BOOL, {.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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int reject_flags = AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_HWACCEL; |
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return ff_set_common_formats(ctx, ff_formats_pixdesc_filter(0, reject_flags)); |
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} |
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static int config_input(AVFilterLink *inlink) |
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{ |
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IlContext *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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s->nb_planes = av_pix_fmt_count_planes(inlink->format); |
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s->has_alpha = !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA); |
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if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0) |
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return ret; |
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s->chroma_height = AV_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 *s = 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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s->linesize[0], inlink->h, |
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out->linesize[0], inpicref->linesize[0], |
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s->luma_mode, s->luma_swap); |
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for (comp = 1; comp < (s->nb_planes - s->has_alpha); comp++) { |
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interleave(out->data[comp], inpicref->data[comp], |
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s->linesize[comp], s->chroma_height, |
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out->linesize[comp], inpicref->linesize[comp], |
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s->chroma_mode, s->chroma_swap); |
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} |
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if (s->has_alpha) { |
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comp = s->nb_planes - 1; |
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interleave(out->data[comp], inpicref->data[comp], |
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s->linesize[comp], inlink->h, |
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out->linesize[comp], inpicref->linesize[comp], |
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s->alpha_mode, s->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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}; |
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const AVFilter ff_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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FILTER_INPUTS(inputs), |
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FILTER_OUTPUTS(ff_video_default_filterpad), |
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FILTER_QUERY_FUNC(query_formats), |
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.priv_class = &il_class, |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
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.process_command = ff_filter_process_command, |
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};
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