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1 | /* |
2 | * Copyright (c) 2010 Stefano Sabatini | |
3 | * Copyright (c) 2008 Vitor Sessak | |
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 | * transposition filter | |
25 | * Based on MPlayer libmpcodecs/vf_rotate.c. | |
26 | */ | |
27 | ||
28 | #include <stdio.h> | |
29 | ||
30 | #include "libavutil/imgutils.h" | |
31 | #include "libavutil/internal.h" | |
32 | #include "libavutil/intreadwrite.h" | |
33 | #include "libavutil/opt.h" | |
34 | #include "libavutil/pixdesc.h" | |
35 | ||
36 | #include "avfilter.h" | |
37 | #include "formats.h" | |
38 | #include "internal.h" | |
39 | #include "video.h" | |
40 | ||
41 | typedef enum { | |
42 | TRANSPOSE_PT_TYPE_NONE, | |
43 | TRANSPOSE_PT_TYPE_LANDSCAPE, | |
44 | TRANSPOSE_PT_TYPE_PORTRAIT, | |
45 | } PassthroughType; | |
46 | ||
47 | enum TransposeDir { | |
48 | TRANSPOSE_CCLOCK_FLIP, | |
49 | TRANSPOSE_CLOCK, | |
50 | TRANSPOSE_CCLOCK, | |
51 | TRANSPOSE_CLOCK_FLIP, | |
52 | }; | |
53 | ||
54 | typedef struct TransContext { | |
55 | const AVClass *class; | |
56 | int hsub, vsub; | |
57 | int pixsteps[4]; | |
58 | ||
59 | PassthroughType passthrough; ///< landscape passthrough mode enabled | |
60 | enum TransposeDir dir; | |
61 | } TransContext; | |
62 | ||
63 | static int query_formats(AVFilterContext *ctx) | |
64 | { | |
65 | AVFilterFormats *pix_fmts = NULL; | |
66 | int fmt; | |
67 | ||
68 | for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) { | |
69 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt); | |
70 | if (!(desc->flags & AV_PIX_FMT_FLAG_PAL || | |
71 | desc->flags & AV_PIX_FMT_FLAG_HWACCEL || | |
72 | desc->flags & AV_PIX_FMT_FLAG_BITSTREAM || | |
73 | desc->log2_chroma_w != desc->log2_chroma_h)) | |
74 | ff_add_format(&pix_fmts, fmt); | |
75 | } | |
76 | ||
77 | ||
78 | ff_set_common_formats(ctx, pix_fmts); | |
79 | return 0; | |
80 | } | |
81 | ||
82 | static int config_props_output(AVFilterLink *outlink) | |
83 | { | |
84 | AVFilterContext *ctx = outlink->src; | |
85 | TransContext *trans = ctx->priv; | |
86 | AVFilterLink *inlink = ctx->inputs[0]; | |
87 | const AVPixFmtDescriptor *desc_out = av_pix_fmt_desc_get(outlink->format); | |
88 | const AVPixFmtDescriptor *desc_in = av_pix_fmt_desc_get(inlink->format); | |
89 | ||
90 | if (trans->dir&4) { | |
91 | av_log(ctx, AV_LOG_WARNING, | |
92 | "dir values greater than 3 are deprecated, use the passthrough option instead\n"); | |
93 | trans->dir &= 3; | |
94 | trans->passthrough = TRANSPOSE_PT_TYPE_LANDSCAPE; | |
95 | } | |
96 | ||
97 | if ((inlink->w >= inlink->h && trans->passthrough == TRANSPOSE_PT_TYPE_LANDSCAPE) || | |
98 | (inlink->w <= inlink->h && trans->passthrough == TRANSPOSE_PT_TYPE_PORTRAIT)) { | |
99 | av_log(ctx, AV_LOG_VERBOSE, | |
100 | "w:%d h:%d -> w:%d h:%d (passthrough mode)\n", | |
101 | inlink->w, inlink->h, inlink->w, inlink->h); | |
102 | return 0; | |
103 | } else { | |
104 | trans->passthrough = TRANSPOSE_PT_TYPE_NONE; | |
105 | } | |
106 | ||
107 | trans->hsub = desc_in->log2_chroma_w; | |
108 | trans->vsub = desc_in->log2_chroma_h; | |
109 | ||
110 | av_image_fill_max_pixsteps(trans->pixsteps, NULL, desc_out); | |
111 | ||
112 | outlink->w = inlink->h; | |
113 | outlink->h = inlink->w; | |
114 | ||
115 | if (inlink->sample_aspect_ratio.num) | |
116 | outlink->sample_aspect_ratio = av_div_q((AVRational) { 1, 1 }, | |
117 | inlink->sample_aspect_ratio); | |
118 | else | |
119 | outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; | |
120 | ||
121 | av_log(ctx, AV_LOG_VERBOSE, | |
122 | "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n", | |
123 | inlink->w, inlink->h, trans->dir, outlink->w, outlink->h, | |
124 | trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise", | |
125 | trans->dir == 0 || trans->dir == 3); | |
126 | return 0; | |
127 | } | |
128 | ||
129 | static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h) | |
130 | { | |
131 | TransContext *trans = inlink->dst->priv; | |
132 | ||
133 | return trans->passthrough ? | |
134 | ff_null_get_video_buffer (inlink, w, h) : | |
135 | ff_default_get_video_buffer(inlink, w, h); | |
136 | } | |
137 | ||
138 | typedef struct ThreadData { | |
139 | AVFrame *in, *out; | |
140 | } ThreadData; | |
141 | ||
142 | static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, | |
143 | int nb_jobs) | |
144 | { | |
145 | TransContext *trans = ctx->priv; | |
146 | ThreadData *td = arg; | |
147 | AVFrame *out = td->out; | |
148 | AVFrame *in = td->in; | |
149 | int plane; | |
150 | ||
151 | for (plane = 0; out->data[plane]; plane++) { | |
152 | int hsub = plane == 1 || plane == 2 ? trans->hsub : 0; | |
153 | int vsub = plane == 1 || plane == 2 ? trans->vsub : 0; | |
154 | int pixstep = trans->pixsteps[plane]; | |
155 | int inh = in->height >> vsub; | |
156 | int outw = FF_CEIL_RSHIFT(out->width, hsub); | |
157 | int outh = FF_CEIL_RSHIFT(out->height, vsub); | |
158 | int start = (outh * jobnr ) / nb_jobs; | |
159 | int end = (outh * (jobnr+1)) / nb_jobs; | |
160 | uint8_t *dst, *src; | |
161 | int dstlinesize, srclinesize; | |
162 | int x, y; | |
163 | ||
164 | dstlinesize = out->linesize[plane]; | |
165 | dst = out->data[plane] + start * dstlinesize; | |
166 | src = in->data[plane]; | |
167 | srclinesize = in->linesize[plane]; | |
168 | ||
169 | if (trans->dir & 1) { | |
170 | src += in->linesize[plane] * (inh - 1); | |
171 | srclinesize *= -1; | |
172 | } | |
173 | ||
174 | if (trans->dir & 2) { | |
175 | dst = out->data[plane] + dstlinesize * (outh - start - 1); | |
176 | dstlinesize *= -1; | |
177 | } | |
178 | ||
179 | switch (pixstep) { | |
180 | case 1: | |
181 | for (y = start; y < end; y++, dst += dstlinesize) | |
182 | for (x = 0; x < outw; x++) | |
183 | dst[x] = src[x * srclinesize + y]; | |
184 | break; | |
185 | case 2: | |
186 | for (y = start; y < end; y++, dst += dstlinesize) { | |
187 | for (x = 0; x < outw; x++) | |
188 | *((uint16_t *)(dst + 2 * x)) = | |
189 | *((uint16_t *)(src + x * srclinesize + y * 2)); | |
190 | } | |
191 | break; | |
192 | case 3: | |
193 | for (y = start; y < end; y++, dst += dstlinesize) { | |
194 | for (x = 0; x < outw; x++) { | |
195 | int32_t v = AV_RB24(src + x * srclinesize + y * 3); | |
196 | AV_WB24(dst + 3 * x, v); | |
197 | } | |
198 | } | |
199 | break; | |
200 | case 4: | |
201 | for (y = start; y < end; y++, dst += dstlinesize) { | |
202 | for (x = 0; x < outw; x++) | |
203 | *((uint32_t *)(dst + 4 * x)) = | |
204 | *((uint32_t *)(src + x * srclinesize + y * 4)); | |
205 | } | |
206 | break; | |
207 | case 6: | |
208 | for (y = start; y < end; y++, dst += dstlinesize) { | |
209 | for (x = 0; x < outw; x++) { | |
210 | int64_t v = AV_RB48(src + x * srclinesize + y*6); | |
211 | AV_WB48(dst + 6*x, v); | |
212 | } | |
213 | } | |
214 | break; | |
215 | case 8: | |
216 | for (y = start; y < end; y++, dst += dstlinesize) { | |
217 | for (x = 0; x < outw; x++) | |
218 | *((uint64_t *)(dst + 8*x)) = *((uint64_t *)(src + x * srclinesize + y*8)); | |
219 | } | |
220 | break; | |
221 | } | |
222 | } | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | static int filter_frame(AVFilterLink *inlink, AVFrame *in) | |
228 | { | |
229 | AVFilterContext *ctx = inlink->dst; | |
230 | TransContext *trans = ctx->priv; | |
231 | AVFilterLink *outlink = ctx->outputs[0]; | |
232 | ThreadData td; | |
233 | AVFrame *out; | |
234 | ||
235 | if (trans->passthrough) | |
236 | return ff_filter_frame(outlink, in); | |
237 | ||
238 | out = ff_get_video_buffer(outlink, outlink->w, outlink->h); | |
239 | if (!out) { | |
240 | av_frame_free(&in); | |
241 | return AVERROR(ENOMEM); | |
242 | } | |
243 | av_frame_copy_props(out, in); | |
244 | ||
245 | if (in->sample_aspect_ratio.num == 0) { | |
246 | out->sample_aspect_ratio = in->sample_aspect_ratio; | |
247 | } else { | |
248 | out->sample_aspect_ratio.num = in->sample_aspect_ratio.den; | |
249 | out->sample_aspect_ratio.den = in->sample_aspect_ratio.num; | |
250 | } | |
251 | ||
252 | td.in = in, td.out = out; | |
253 | ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outlink->h, ctx->graph->nb_threads)); | |
254 | av_frame_free(&in); | |
255 | return ff_filter_frame(outlink, out); | |
256 | } | |
257 | ||
258 | #define OFFSET(x) offsetof(TransContext, x) | |
259 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM | |
260 | ||
261 | static const AVOption transpose_options[] = { | |
262 | { "dir", "set transpose direction", OFFSET(dir), AV_OPT_TYPE_INT, { .i64 = TRANSPOSE_CCLOCK_FLIP }, 0, 7, FLAGS, "dir" }, | |
263 | { "cclock_flip", "rotate counter-clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK_FLIP }, .unit = "dir" }, | |
264 | { "clock", "rotate clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK }, .unit = "dir" }, | |
265 | { "cclock", "rotate counter-clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK }, .unit = "dir" }, | |
266 | { "clock_flip", "rotate clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK_FLIP }, .unit = "dir" }, | |
267 | ||
268 | { "passthrough", "do not apply transposition if the input matches the specified geometry", | |
269 | OFFSET(passthrough), AV_OPT_TYPE_INT, {.i64=TRANSPOSE_PT_TYPE_NONE}, 0, INT_MAX, FLAGS, "passthrough" }, | |
270 | { "none", "always apply transposition", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_NONE}, INT_MIN, INT_MAX, FLAGS, "passthrough" }, | |
271 | { "portrait", "preserve portrait geometry", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_PORTRAIT}, INT_MIN, INT_MAX, FLAGS, "passthrough" }, | |
272 | { "landscape", "preserve landscape geometry", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_LANDSCAPE}, INT_MIN, INT_MAX, FLAGS, "passthrough" }, | |
273 | ||
274 | { NULL } | |
275 | }; | |
276 | ||
277 | AVFILTER_DEFINE_CLASS(transpose); | |
278 | ||
279 | static const AVFilterPad avfilter_vf_transpose_inputs[] = { | |
280 | { | |
281 | .name = "default", | |
282 | .type = AVMEDIA_TYPE_VIDEO, | |
283 | .get_video_buffer = get_video_buffer, | |
284 | .filter_frame = filter_frame, | |
285 | }, | |
286 | { NULL } | |
287 | }; | |
288 | ||
289 | static const AVFilterPad avfilter_vf_transpose_outputs[] = { | |
290 | { | |
291 | .name = "default", | |
292 | .config_props = config_props_output, | |
293 | .type = AVMEDIA_TYPE_VIDEO, | |
294 | }, | |
295 | { NULL } | |
296 | }; | |
297 | ||
298 | AVFilter ff_vf_transpose = { | |
299 | .name = "transpose", | |
300 | .description = NULL_IF_CONFIG_SMALL("Transpose input video."), | |
301 | .priv_size = sizeof(TransContext), | |
302 | .priv_class = &transpose_class, | |
303 | .query_formats = query_formats, | |
304 | .inputs = avfilter_vf_transpose_inputs, | |
305 | .outputs = avfilter_vf_transpose_outputs, | |
306 | .flags = AVFILTER_FLAG_SLICE_THREADS, | |
307 | }; |