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vf_transpose.c
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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 {
46 
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
61 } TransContext;
62 
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 ||
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) {
92  "dir values greater than 3 are deprecated, use the passthrough option instead\n");
93  trans->dir &= 3;
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)) {
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 {
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) {
247  } else {
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 
278 
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 
290  {
291  .name = "default",
292  .config_props = config_props_output,
293  .type = AVMEDIA_TYPE_VIDEO,
294  },
295  { NULL }
296 };
297 
299  .name = "transpose",
300  .description = NULL_IF_CONFIG_SMALL("Transpose input video."),
301  .priv_size = sizeof(TransContext),
302  .priv_class = &transpose_class,
304  .inputs = avfilter_vf_transpose_inputs,
305  .outputs = avfilter_vf_transpose_outputs,
307 };