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1 | /* |
2 | * Copyright (c) 2013 Paul B Mahol | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include "libavutil/avstring.h" | |
22 | #include "libavutil/imgutils.h" | |
23 | #include "libavutil/opt.h" | |
24 | #include "libavutil/pixdesc.h" | |
25 | #include "avfilter.h" | |
26 | #include "drawutils.h" | |
27 | #include "internal.h" | |
28 | ||
29 | #define PLANE_R 0x01 | |
30 | #define PLANE_G 0x02 | |
31 | #define PLANE_B 0x04 | |
32 | #define PLANE_A 0x08 | |
33 | #define PLANE_Y 0x10 | |
34 | #define PLANE_U 0x20 | |
35 | #define PLANE_V 0x40 | |
36 | ||
37 | typedef struct { | |
38 | const AVClass *class; | |
39 | int requested_planes; | |
40 | int map[4]; | |
41 | int linesize[4]; | |
42 | int is_packed_rgb; | |
43 | int depth; | |
44 | int step; | |
45 | } ExtractPlanesContext; | |
46 | ||
47 | #define OFFSET(x) offsetof(ExtractPlanesContext, x) | |
48 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM | |
49 | static const AVOption extractplanes_options[] = { | |
50 | { "planes", "set planes", OFFSET(requested_planes), AV_OPT_TYPE_FLAGS, {.i64=1}, 1, 0xff, FLAGS, "flags"}, | |
51 | { "y", "set luma plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_Y}, 0, 0, FLAGS, "flags"}, | |
52 | { "u", "set u plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_U}, 0, 0, FLAGS, "flags"}, | |
53 | { "v", "set v plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_V}, 0, 0, FLAGS, "flags"}, | |
54 | { "r", "set red plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_R}, 0, 0, FLAGS, "flags"}, | |
55 | { "g", "set green plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_G}, 0, 0, FLAGS, "flags"}, | |
56 | { "b", "set blue plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_B}, 0, 0, FLAGS, "flags"}, | |
57 | { "a", "set alpha plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_A}, 0, 0, FLAGS, "flags"}, | |
58 | { NULL } | |
59 | }; | |
60 | ||
61 | AVFILTER_DEFINE_CLASS(extractplanes); | |
62 | ||
63 | static int query_formats(AVFilterContext *ctx) | |
64 | { | |
65 | static const enum AVPixelFormat in_pixfmts[] = { | |
66 | AV_PIX_FMT_YUV410P, | |
67 | AV_PIX_FMT_YUV411P, | |
68 | AV_PIX_FMT_YUV440P, | |
69 | AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P, | |
70 | AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P, | |
71 | AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, | |
72 | AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P, | |
73 | AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, | |
74 | AV_PIX_FMT_YUV420P16LE, AV_PIX_FMT_YUVA420P16LE, | |
75 | AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_YUVA420P16BE, | |
76 | AV_PIX_FMT_YUV422P16LE, AV_PIX_FMT_YUVA422P16LE, | |
77 | AV_PIX_FMT_YUV422P16BE, AV_PIX_FMT_YUVA422P16BE, | |
78 | AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUVA444P16LE, | |
79 | AV_PIX_FMT_YUV444P16BE, AV_PIX_FMT_YUVA444P16BE, | |
80 | AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A, | |
81 | AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE, | |
82 | AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, | |
83 | AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, | |
84 | AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, | |
85 | AV_PIX_FMT_RGB48LE, AV_PIX_FMT_BGR48LE, | |
86 | AV_PIX_FMT_RGB48BE, AV_PIX_FMT_BGR48BE, | |
87 | AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_BGRA64LE, | |
88 | AV_PIX_FMT_RGBA64BE, AV_PIX_FMT_BGRA64BE, | |
89 | AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, | |
90 | AV_PIX_FMT_GBRP16LE, AV_PIX_FMT_GBRP16BE, | |
91 | AV_PIX_FMT_GBRAP16LE, AV_PIX_FMT_GBRAP16BE, | |
92 | AV_PIX_FMT_NONE, | |
93 | }; | |
94 | static const enum AVPixelFormat out8_pixfmts[] = { AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE }; | |
95 | static const enum AVPixelFormat out16le_pixfmts[] = { AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_NONE }; | |
96 | static const enum AVPixelFormat out16be_pixfmts[] = { AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE }; | |
97 | const enum AVPixelFormat *out_pixfmts; | |
98 | const AVPixFmtDescriptor *desc; | |
99 | AVFilterFormats *avff; | |
100 | int i, depth = 0, be = 0; | |
101 | ||
102 | if (!ctx->inputs[0]->in_formats || | |
103 | !ctx->inputs[0]->in_formats->nb_formats) { | |
104 | return AVERROR(EAGAIN); | |
105 | } | |
106 | ||
107 | if (!ctx->inputs[0]->out_formats) | |
108 | ff_formats_ref(ff_make_format_list(in_pixfmts), &ctx->inputs[0]->out_formats); | |
109 | ||
110 | avff = ctx->inputs[0]->in_formats; | |
111 | desc = av_pix_fmt_desc_get(avff->formats[0]); | |
112 | depth = desc->comp[0].depth_minus1; | |
113 | be = desc->flags & AV_PIX_FMT_FLAG_BE; | |
114 | for (i = 1; i < avff->nb_formats; i++) { | |
115 | desc = av_pix_fmt_desc_get(avff->formats[i]); | |
116 | if (depth != desc->comp[0].depth_minus1 || | |
117 | be != (desc->flags & AV_PIX_FMT_FLAG_BE)) { | |
118 | return AVERROR(EAGAIN); | |
119 | } | |
120 | } | |
121 | ||
122 | if (depth == 7) | |
123 | out_pixfmts = out8_pixfmts; | |
124 | else if (be) | |
125 | out_pixfmts = out16be_pixfmts; | |
126 | else | |
127 | out_pixfmts = out16le_pixfmts; | |
128 | ||
129 | for (i = 0; i < ctx->nb_outputs; i++) | |
130 | ff_formats_ref(ff_make_format_list(out_pixfmts), &ctx->outputs[i]->in_formats); | |
131 | return 0; | |
132 | } | |
133 | ||
134 | static int config_input(AVFilterLink *inlink) | |
135 | { | |
136 | AVFilterContext *ctx = inlink->dst; | |
137 | ExtractPlanesContext *e = ctx->priv; | |
138 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); | |
139 | int plane_avail, ret, i; | |
140 | uint8_t rgba_map[4]; | |
141 | ||
142 | plane_avail = ((desc->flags & AV_PIX_FMT_FLAG_RGB) ? PLANE_R|PLANE_G|PLANE_B : | |
143 | PLANE_Y | | |
144 | ((desc->nb_components > 2) ? PLANE_U|PLANE_V : 0)) | | |
145 | ((desc->flags & AV_PIX_FMT_FLAG_ALPHA) ? PLANE_A : 0); | |
146 | if (e->requested_planes & ~plane_avail) { | |
147 | av_log(ctx, AV_LOG_ERROR, "Requested planes not available.\n"); | |
148 | return AVERROR(EINVAL); | |
149 | } | |
150 | if ((ret = av_image_fill_linesizes(e->linesize, inlink->format, inlink->w)) < 0) | |
151 | return ret; | |
152 | ||
153 | e->depth = (desc->comp[0].depth_minus1 + 1) >> 3; | |
154 | e->step = av_get_padded_bits_per_pixel(desc) >> 3; | |
155 | e->is_packed_rgb = !(desc->flags & AV_PIX_FMT_FLAG_PLANAR); | |
156 | if (desc->flags & AV_PIX_FMT_FLAG_RGB) { | |
157 | ff_fill_rgba_map(rgba_map, inlink->format); | |
158 | for (i = 0; i < 4; i++) | |
159 | e->map[i] = rgba_map[e->map[i]]; | |
160 | } | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | static int config_output(AVFilterLink *outlink) | |
166 | { | |
167 | AVFilterContext *ctx = outlink->src; | |
168 | AVFilterLink *inlink = ctx->inputs[0]; | |
169 | ExtractPlanesContext *e = ctx->priv; | |
170 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); | |
171 | const int output = outlink->srcpad - ctx->output_pads; | |
172 | ||
173 | if (e->map[output] == 1 || e->map[output] == 2) { | |
174 | outlink->h = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); | |
175 | outlink->w = FF_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w); | |
176 | } | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
181 | static void extract_from_packed(uint8_t *dst, int dst_linesize, | |
182 | const uint8_t *src, int src_linesize, | |
183 | int width, int height, | |
184 | int depth, int step, int comp) | |
185 | { | |
186 | int x, y; | |
187 | ||
188 | for (y = 0; y < height; y++) { | |
189 | switch (depth) { | |
190 | case 1: | |
191 | for (x = 0; x < width; x++) | |
192 | dst[x] = src[x * step + comp]; | |
193 | break; | |
194 | case 2: | |
195 | for (x = 0; x < width; x++) { | |
196 | dst[x * 2 ] = src[x * step + comp * 2 ]; | |
197 | dst[x * 2 + 1] = src[x * step + comp * 2 + 1]; | |
198 | } | |
199 | break; | |
200 | } | |
201 | dst += dst_linesize; | |
202 | src += src_linesize; | |
203 | } | |
204 | } | |
205 | ||
206 | static int filter_frame(AVFilterLink *inlink, AVFrame *frame) | |
207 | { | |
208 | AVFilterContext *ctx = inlink->dst; | |
209 | ExtractPlanesContext *e = ctx->priv; | |
210 | int i, eof = 0, ret = 0; | |
211 | ||
212 | for (i = 0; i < ctx->nb_outputs; i++) { | |
213 | AVFilterLink *outlink = ctx->outputs[i]; | |
214 | const int idx = e->map[i]; | |
215 | AVFrame *out; | |
216 | ||
217 | if (outlink->closed) | |
218 | continue; | |
219 | ||
220 | out = ff_get_video_buffer(outlink, outlink->w, outlink->h); | |
221 | if (!out) { | |
222 | ret = AVERROR(ENOMEM); | |
223 | break; | |
224 | } | |
225 | av_frame_copy_props(out, frame); | |
226 | ||
227 | if (e->is_packed_rgb) { | |
228 | extract_from_packed(out->data[0], out->linesize[0], | |
229 | frame->data[0], frame->linesize[0], | |
230 | outlink->w, outlink->h, | |
231 | e->depth, | |
232 | e->step, idx); | |
233 | } else { | |
234 | av_image_copy_plane(out->data[0], out->linesize[0], | |
235 | frame->data[idx], frame->linesize[idx], | |
236 | e->linesize[idx], outlink->h); | |
237 | } | |
238 | ||
239 | ret = ff_filter_frame(outlink, out); | |
240 | if (ret == AVERROR_EOF) | |
241 | eof++; | |
242 | else if (ret < 0) | |
243 | break; | |
244 | } | |
245 | av_frame_free(&frame); | |
246 | ||
247 | if (eof == ctx->nb_outputs) | |
248 | ret = AVERROR_EOF; | |
249 | else if (ret == AVERROR_EOF) | |
250 | ret = 0; | |
251 | return ret; | |
252 | } | |
253 | ||
254 | static av_cold int init(AVFilterContext *ctx) | |
255 | { | |
256 | ExtractPlanesContext *e = ctx->priv; | |
257 | int planes = (e->requested_planes & 0xf) | (e->requested_planes >> 4); | |
258 | int i; | |
259 | ||
260 | for (i = 0; i < 4; i++) { | |
261 | char *name; | |
262 | AVFilterPad pad = { 0 }; | |
263 | ||
264 | if (!(planes & (1 << i))) | |
265 | continue; | |
266 | ||
267 | name = av_asprintf("out%d", ctx->nb_outputs); | |
268 | if (!name) | |
269 | return AVERROR(ENOMEM); | |
270 | e->map[ctx->nb_outputs] = i; | |
271 | pad.name = name; | |
272 | pad.type = AVMEDIA_TYPE_VIDEO; | |
273 | pad.config_props = config_output; | |
274 | ||
275 | ff_insert_outpad(ctx, ctx->nb_outputs, &pad); | |
276 | } | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | static av_cold void uninit(AVFilterContext *ctx) | |
282 | { | |
283 | int i; | |
284 | ||
285 | for (i = 0; i < ctx->nb_outputs; i++) | |
286 | av_freep(&ctx->output_pads[i].name); | |
287 | } | |
288 | ||
289 | static const AVFilterPad extractplanes_inputs[] = { | |
290 | { | |
291 | .name = "default", | |
292 | .type = AVMEDIA_TYPE_VIDEO, | |
293 | .filter_frame = filter_frame, | |
294 | .config_props = config_input, | |
295 | }, | |
296 | { NULL } | |
297 | }; | |
298 | ||
299 | AVFilter ff_vf_extractplanes = { | |
300 | .name = "extractplanes", | |
301 | .description = NULL_IF_CONFIG_SMALL("Extract planes as grayscale frames."), | |
302 | .priv_size = sizeof(ExtractPlanesContext), | |
303 | .priv_class = &extractplanes_class, | |
304 | .init = init, | |
305 | .uninit = uninit, | |
306 | .query_formats = query_formats, | |
307 | .inputs = extractplanes_inputs, | |
308 | .outputs = NULL, | |
309 | .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS, | |
310 | }; | |
311 | ||
312 | #if CONFIG_ALPHAEXTRACT_FILTER | |
313 | ||
314 | static av_cold int init_alphaextract(AVFilterContext *ctx) | |
315 | { | |
316 | ExtractPlanesContext *e = ctx->priv; | |
317 | ||
318 | e->requested_planes = PLANE_A; | |
319 | ||
320 | return init(ctx); | |
321 | } | |
322 | ||
323 | AVFilter ff_vf_alphaextract = { | |
324 | .name = "alphaextract", | |
325 | .description = NULL_IF_CONFIG_SMALL("Extract an alpha channel as a " | |
326 | "grayscale image component."), | |
327 | .priv_size = sizeof(ExtractPlanesContext), | |
328 | .init = init_alphaextract, | |
329 | .uninit = uninit, | |
330 | .query_formats = query_formats, | |
331 | .inputs = extractplanes_inputs, | |
332 | .outputs = NULL, | |
333 | .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS, | |
334 | }; | |
335 | #endif /* CONFIG_ALPHAEXTRACT_FILTER */ |