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| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2002 Michael Niedermayer |
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| 3 | * Copyright (c) 2013 Paul B Mahol |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | /** |
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| 23 | * @file |
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| 24 | * (de)interleave fields filter |
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| 25 | */ |
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| 26 | |||
| 27 | #include "libavutil/opt.h" |
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| 28 | #include "libavutil/imgutils.h" |
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| 29 | #include "libavutil/pixdesc.h" |
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| 30 | #include "avfilter.h" |
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| 31 | #include "internal.h" |
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| 32 | |||
| 33 | enum FilterMode { |
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| 34 | MODE_NONE, |
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| 35 | MODE_INTERLEAVE, |
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| 36 | MODE_DEINTERLEAVE |
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| 37 | }; |
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| 38 | |||
| 39 | typedef struct { |
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| 40 | const AVClass *class; |
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| 41 | enum FilterMode luma_mode, chroma_mode, alpha_mode; |
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| 42 | int luma_swap, chroma_swap, alpha_swap; |
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| 43 | int nb_planes; |
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| 44 | int linesize[4], chroma_height; |
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| 45 | int has_alpha; |
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| 46 | } IlContext; |
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| 47 | |||
| 48 | #define OFFSET(x) offsetof(IlContext, x) |
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| 49 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
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| 50 | |||
| 51 | static const AVOption il_options[] = { |
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| 52 | {"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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| 53 | {"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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| 54 | {"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "luma_mode"}, |
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| 55 | {"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "luma_mode"}, |
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| 56 | {"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "luma_mode"}, |
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| 57 | {"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "luma_mode"}, |
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| 58 | {"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "luma_mode"}, |
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| 59 | {"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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| 60 | {"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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| 61 | {"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "chroma_mode"}, |
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| 62 | {"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "chroma_mode"}, |
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| 63 | {"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "chroma_mode"}, |
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| 64 | {"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "chroma_mode"}, |
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| 65 | {"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "chroma_mode"}, |
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| 66 | {"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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| 67 | {"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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| 68 | {"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "alpha_mode"}, |
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| 69 | {"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "alpha_mode"}, |
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| 70 | {"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "alpha_mode"}, |
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| 71 | {"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "alpha_mode"}, |
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| 72 | {"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "alpha_mode"}, |
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| 73 | {"luma_swap", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS}, |
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| 74 | {"ls", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS}, |
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| 75 | {"chroma_swap", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS}, |
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| 76 | {"cs", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS}, |
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| 77 | {"alpha_swap", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS}, |
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| 78 | {"as", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS}, |
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| 79 | {NULL} |
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| 80 | }; |
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| 81 | |||
| 82 | AVFILTER_DEFINE_CLASS(il); |
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| 83 | |||
| 84 | static int query_formats(AVFilterContext *ctx) |
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| 85 | { |
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| 86 | AVFilterFormats *formats = NULL; |
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| 87 | int fmt; |
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| 88 | |||
| 89 | for (fmt = 0; fmt < AV_PIX_FMT_NB; fmt++) { |
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| 90 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt); |
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| 91 | if (!(desc->flags & AV_PIX_FMT_FLAG_PAL) && !(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)) |
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| 92 | ff_add_format(&formats, fmt); |
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| 93 | } |
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| 94 | |||
| 95 | ff_set_common_formats(ctx, formats); |
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| 96 | return 0; |
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| 97 | } |
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| 98 | |||
| 99 | static int config_input(AVFilterLink *inlink) |
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| 100 | { |
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| 101 | IlContext *il = inlink->dst->priv; |
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| 102 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
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| 103 | int ret; |
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| 104 | |||
| 105 | il->nb_planes = av_pix_fmt_count_planes(inlink->format); |
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| 106 | |||
| 107 | il->has_alpha = !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA); |
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| 108 | if ((ret = av_image_fill_linesizes(il->linesize, inlink->format, inlink->w)) < 0) |
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| 109 | return ret; |
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| 110 | |||
| 111 | il->chroma_height = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); |
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| 112 | |||
| 113 | return 0; |
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| 114 | } |
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| 115 | |||
| 116 | static void interleave(uint8_t *dst, uint8_t *src, int w, int h, |
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| 117 | int dst_linesize, int src_linesize, |
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| 118 | enum FilterMode mode, int swap) |
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| 119 | { |
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| 120 | const int a = swap; |
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| 121 | const int b = 1 - a; |
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| 122 | const int m = h >> 1; |
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| 123 | int y; |
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| 124 | |||
| 125 | switch (mode) { |
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| 126 | case MODE_DEINTERLEAVE: |
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| 127 | for (y = 0; y < m; y++) { |
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| 128 | memcpy(dst + dst_linesize * y , src + src_linesize * (y * 2 + a), w); |
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| 129 | memcpy(dst + dst_linesize * (y + m), src + src_linesize * (y * 2 + b), w); |
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| 130 | } |
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| 131 | break; |
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| 132 | case MODE_NONE: |
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| 133 | for (y = 0; y < m; y++) { |
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| 134 | memcpy(dst + dst_linesize * y * 2 , src + src_linesize * (y * 2 + a), w); |
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| 135 | memcpy(dst + dst_linesize * (y * 2 + 1), src + src_linesize * (y * 2 + b), w); |
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| 136 | } |
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| 137 | break; |
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| 138 | case MODE_INTERLEAVE: |
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| 139 | for (y = 0; y < m; y++) { |
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| 140 | memcpy(dst + dst_linesize * (y * 2 + a), src + src_linesize * y , w); |
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| 141 | memcpy(dst + dst_linesize * (y * 2 + b), src + src_linesize * (y + m), w); |
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| 142 | } |
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| 143 | break; |
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| 144 | } |
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| 145 | } |
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| 146 | |||
| 147 | static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref) |
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| 148 | { |
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| 149 | IlContext *il = inlink->dst->priv; |
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| 150 | AVFilterLink *outlink = inlink->dst->outputs[0]; |
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| 151 | AVFrame *out; |
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| 152 | int comp; |
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| 153 | |||
| 154 | out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
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| 155 | if (!out) { |
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| 156 | av_frame_free(&inpicref); |
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| 157 | return AVERROR(ENOMEM); |
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| 158 | } |
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| 159 | av_frame_copy_props(out, inpicref); |
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| 160 | |||
| 161 | interleave(out->data[0], inpicref->data[0], |
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| 162 | il->linesize[0], inlink->h, |
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| 163 | out->linesize[0], inpicref->linesize[0], |
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| 164 | il->luma_mode, il->luma_swap); |
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| 165 | |||
| 166 | for (comp = 1; comp < (il->nb_planes - il->has_alpha); comp++) { |
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| 167 | interleave(out->data[comp], inpicref->data[comp], |
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| 168 | il->linesize[comp], il->chroma_height, |
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| 169 | out->linesize[comp], inpicref->linesize[comp], |
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| 170 | il->chroma_mode, il->chroma_swap); |
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| 171 | } |
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| 172 | |||
| 173 | if (il->has_alpha) { |
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| 174 | comp = il->nb_planes - 1; |
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| 175 | interleave(out->data[comp], inpicref->data[comp], |
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| 176 | il->linesize[comp], inlink->h, |
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| 177 | out->linesize[comp], inpicref->linesize[comp], |
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| 178 | il->alpha_mode, il->alpha_swap); |
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| 179 | } |
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| 180 | |||
| 181 | av_frame_free(&inpicref); |
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| 182 | return ff_filter_frame(outlink, out); |
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| 183 | } |
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| 184 | |||
| 185 | static const AVFilterPad inputs[] = { |
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| 186 | { |
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| 187 | .name = "default", |
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| 188 | .type = AVMEDIA_TYPE_VIDEO, |
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| 189 | .filter_frame = filter_frame, |
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| 190 | .config_props = config_input, |
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| 191 | }, |
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| 192 | { NULL } |
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| 193 | }; |
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| 194 | |||
| 195 | static const AVFilterPad outputs[] = { |
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| 196 | { |
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| 197 | .name = "default", |
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| 198 | .type = AVMEDIA_TYPE_VIDEO, |
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| 199 | }, |
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| 200 | { NULL } |
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| 201 | }; |
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| 202 | |||
| 203 | AVFilter avfilter_vf_il = { |
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| 204 | .name = "il", |
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| 205 | .description = NULL_IF_CONFIG_SMALL("Deinterleave or interleave fields."), |
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| 206 | .priv_size = sizeof(IlContext), |
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| 207 | .query_formats = query_formats, |
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| 208 | .inputs = inputs, |
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| 209 | .outputs = outputs, |
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| 210 | .priv_class = &il_class, |
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| 211 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
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| 212 | }; |