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