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