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vf_mergeplanes.c
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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/avassert.h"
22 #include "libavutil/avstring.h"
23 #include "libavutil/imgutils.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/pixdesc.h"
26 #include "avfilter.h"
27 #include "internal.h"
28 #include "framesync.h"
29 
30 typedef struct InputParam {
31  int depth[4];
32  int nb_planes;
33  int planewidth[4];
34  int planeheight[4];
35 } InputParam;
36 
37 typedef struct MergePlanesContext {
38  const AVClass *class;
39  int64_t mapping;
40  const enum AVPixelFormat out_fmt;
41  int nb_inputs;
42  int nb_planes;
43  int planewidth[4];
44  int planeheight[4];
45  int map[4][2];
47 
49  FFFrameSyncIn fsin[3]; /* must be immediately after fs */
51 
52 #define OFFSET(x) offsetof(MergePlanesContext, x)
53 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
54 static const AVOption mergeplanes_options[] = {
55  { "mapping", "set input to output plane mapping", OFFSET(mapping), AV_OPT_TYPE_INT, {.i64=0}, 0, 0x33333333, FLAGS },
56  { "format", "set output pixel format", OFFSET(out_fmt), AV_OPT_TYPE_PIXEL_FMT, {.i64=AV_PIX_FMT_YUVA444P}, 0, INT_MAX, .flags=FLAGS },
57  { NULL }
58 };
59 
60 AVFILTER_DEFINE_CLASS(mergeplanes);
61 
62 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
63 {
64  MergePlanesContext *s = inlink->dst->priv;
65  return ff_framesync_filter_frame(&s->fs, inlink, in);
66 }
67 
68 static av_cold int init(AVFilterContext *ctx)
69 {
70  MergePlanesContext *s = ctx->priv;
71  int64_t m = s->mapping;
72  int i, ret;
73 
75  if (!(s->outdesc->flags & AV_PIX_FMT_FLAG_PLANAR) ||
76  s->outdesc->nb_components < 2) {
77  av_log(ctx, AV_LOG_ERROR, "Only planar formats with more than one component are supported.\n");
78  return AVERROR(EINVAL);
79  }
81 
82  for (i = s->nb_planes - 1; i >= 0; i--) {
83  s->map[i][0] = m & 0xf;
84  m >>= 4;
85  s->map[i][1] = m & 0xf;
86  m >>= 4;
87 
88  if (s->map[i][0] > 3 || s->map[i][1] > 3) {
89  av_log(ctx, AV_LOG_ERROR, "Mapping with out of range input and/or plane number.\n");
90  return AVERROR(EINVAL);
91  }
92 
93  s->nb_inputs = FFMAX(s->nb_inputs, s->map[i][1] + 1);
94  }
95 
96  av_assert0(s->nb_inputs && s->nb_inputs <= 4);
97 
98  for (i = 0; i < s->nb_inputs; i++) {
99  AVFilterPad pad = { 0 };
100 
101  pad.type = AVMEDIA_TYPE_VIDEO;
102  pad.name = av_asprintf("in%d", i);
103  if (!pad.name)
104  return AVERROR(ENOMEM);
106 
107  if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0){
108  av_freep(&pad.name);
109  return ret;
110  }
111  }
112 
113  return 0;
114 }
115 
117 {
118  MergePlanesContext *s = ctx->priv;
119  AVFilterFormats *formats = NULL;
120  int i;
121 
123  for (i = 0; i < AV_PIX_FMT_NB; i++) {
124  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(i);
125  if (desc->comp[0].depth_minus1 == s->outdesc->comp[0].depth_minus1 &&
127  ff_add_format(&formats, i);
128  }
129 
130  for (i = 0; i < s->nb_inputs; i++)
131  ff_formats_ref(formats, &ctx->inputs[i]->out_formats);
132 
133  formats = NULL;
134  ff_add_format(&formats, s->out_fmt);
135  ff_formats_ref(formats, &ctx->outputs[0]->in_formats);
136 
137  return 0;
138 }
139 
140 static int process_frame(FFFrameSync *fs)
141 {
142  AVFilterContext *ctx = fs->parent;
143  AVFilterLink *outlink = ctx->outputs[0];
144  MergePlanesContext *s = fs->opaque;
145  AVFrame *in[4] = { NULL };
146  AVFrame *out;
147  int i, ret;
148 
149  for (i = 0; i < s->nb_inputs; i++) {
150  if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
151  return ret;
152  }
153 
154  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
155  if (!out)
156  return AVERROR(ENOMEM);
157  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
158 
159  for (i = 0; i < s->nb_planes; i++) {
160  const int input = s->map[i][1];
161  const int plane = s->map[i][0];
162 
163  av_image_copy_plane(out->data[i], out->linesize[i],
164  in[input]->data[plane], in[input]->linesize[plane],
165  s->planewidth[i], s->planeheight[i]);
166  }
167 
168  return ff_filter_frame(outlink, out);
169 }
170 
171 static int config_output(AVFilterLink *outlink)
172 {
173  AVFilterContext *ctx = outlink->src;
174  MergePlanesContext *s = ctx->priv;
175  InputParam inputsp[4];
176  FFFrameSyncIn *in;
177  int i;
178 
179  ff_framesync_init(&s->fs, ctx, s->nb_inputs);
180  in = s->fs.in;
181  s->fs.opaque = s;
183 
184  outlink->w = ctx->inputs[0]->w;
185  outlink->h = ctx->inputs[0]->h;
186  outlink->time_base = ctx->inputs[0]->time_base;
187  outlink->frame_rate = ctx->inputs[0]->frame_rate;
188  outlink->sample_aspect_ratio = ctx->inputs[0]->sample_aspect_ratio;
189 
190  s->planewidth[1] =
191  s->planewidth[2] = FF_CEIL_RSHIFT(outlink->w, s->outdesc->log2_chroma_w);
192  s->planewidth[0] =
193  s->planewidth[3] = outlink->w;
194  s->planeheight[1] =
195  s->planeheight[2] = FF_CEIL_RSHIFT(outlink->h, s->outdesc->log2_chroma_h);
196  s->planeheight[0] =
197  s->planeheight[3] = outlink->h;
198 
199  for (i = 0; i < s->nb_inputs; i++) {
200  InputParam *inputp = &inputsp[i];
201  AVFilterLink *inlink = ctx->inputs[i];
202  const AVPixFmtDescriptor *indesc = av_pix_fmt_desc_get(inlink->format);
203  int j;
204 
205  if (outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num ||
206  outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
207  av_log(ctx, AV_LOG_ERROR, "input #%d link %s SAR %d:%d "
208  "does not match output link %s SAR %d:%d\n",
209  i, ctx->input_pads[i].name,
210  inlink->sample_aspect_ratio.num,
211  inlink->sample_aspect_ratio.den,
212  ctx->output_pads[0].name,
213  outlink->sample_aspect_ratio.num,
214  outlink->sample_aspect_ratio.den);
215  return AVERROR(EINVAL);
216  }
217 
218  inputp->planewidth[1] =
219  inputp->planewidth[2] = FF_CEIL_RSHIFT(inlink->w, indesc->log2_chroma_w);
220  inputp->planewidth[0] =
221  inputp->planewidth[3] = inlink->w;
222  inputp->planeheight[1] =
223  inputp->planeheight[2] = FF_CEIL_RSHIFT(inlink->h, indesc->log2_chroma_h);
224  inputp->planeheight[0] =
225  inputp->planeheight[3] = inlink->h;
226  inputp->nb_planes = av_pix_fmt_count_planes(inlink->format);
227 
228  for (j = 0; j < inputp->nb_planes; j++)
229  inputp->depth[j] = indesc->comp[j].depth_minus1 + 1;
230 
231  in[i].time_base = inlink->time_base;
232  in[i].sync = 1;
233  in[i].before = EXT_STOP;
234  in[i].after = EXT_STOP;
235  }
236 
237  for (i = 0; i < s->nb_planes; i++) {
238  const int input = s->map[i][1];
239  const int plane = s->map[i][0];
240  InputParam *inputp = &inputsp[input];
241 
242  if (plane + 1 > inputp->nb_planes) {
243  av_log(ctx, AV_LOG_ERROR, "input %d does not have %d plane\n",
244  input, plane);
245  goto fail;
246  }
247  if (s->outdesc->comp[i].depth_minus1 + 1 != inputp->depth[plane]) {
248  av_log(ctx, AV_LOG_ERROR, "output plane %d depth %d does not "
249  "match input %d plane %d depth %d\n",
250  i, s->outdesc->comp[i].depth_minus1 + 1,
251  input, plane, inputp->depth[plane]);
252  goto fail;
253  }
254  if (s->planewidth[i] != inputp->planewidth[plane]) {
255  av_log(ctx, AV_LOG_ERROR, "output plane %d width %d does not "
256  "match input %d plane %d width %d\n",
257  i, s->planewidth[i],
258  input, plane, inputp->planewidth[plane]);
259  goto fail;
260  }
261  if (s->planeheight[i] != inputp->planeheight[plane]) {
262  av_log(ctx, AV_LOG_ERROR, "output plane %d height %d does not "
263  "match input %d plane %d height %d\n",
264  i, s->planeheight[i],
265  input, plane, inputp->planeheight[plane]);
266  goto fail;
267  }
268  }
269 
270  return ff_framesync_configure(&s->fs);
271 fail:
272  return AVERROR(EINVAL);
273 }
274 
275 static int request_frame(AVFilterLink *outlink)
276 {
277  MergePlanesContext *s = outlink->src->priv;
278  return ff_framesync_request_frame(&s->fs, outlink);
279 }
280 
281 static av_cold void uninit(AVFilterContext *ctx)
282 {
283  MergePlanesContext *s = ctx->priv;
284  int i;
285 
286  ff_framesync_uninit(&s->fs);
287 
288  for (i = 0; i < ctx->nb_inputs; i++)
289  av_freep(&ctx->input_pads[i].name);
290 }
291 
293  {
294  .name = "default",
295  .type = AVMEDIA_TYPE_VIDEO,
296  .config_props = config_output,
297  .request_frame = request_frame,
298  },
299  { NULL }
300 };
301 
303  .name = "mergeplanes",
304  .description = NULL_IF_CONFIG_SMALL("Merge planes."),
305  .priv_size = sizeof(MergePlanesContext),
306  .priv_class = &mergeplanes_class,
307  .init = init,
308  .uninit = uninit,
310  .inputs = NULL,
311  .outputs = mergeplanes_outputs,
313 };