a8ef440b3658cce677b2bc44c3f300824dee5308
[libav.git] / libavfilter / vf_transpose.c
1 /*
2 * Copyright (c) 2010 Stefano Sabatini
3 * Copyright (c) 2008 Vitor Sessak
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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 "avfilter.h"
35 #include "formats.h"
36 #include "internal.h"
37 #include "video.h"
38
39 typedef struct {
40 int hsub, vsub;
41 int pixsteps[4];
42
43 /* 0 Rotate by 90 degrees counterclockwise and vflip. */
44 /* 1 Rotate by 90 degrees clockwise. */
45 /* 2 Rotate by 90 degrees counterclockwise. */
46 /* 3 Rotate by 90 degrees clockwise and vflip. */
47 int dir;
48 } TransContext;
49
50 static av_cold int init(AVFilterContext *ctx, const char *args)
51 {
52 TransContext *trans = ctx->priv;
53 trans->dir = 0;
54
55 if (args)
56 sscanf(args, "%d", &trans->dir);
57
58 if (trans->dir < 0 || trans->dir > 3) {
59 av_log(ctx, AV_LOG_ERROR, "Invalid value %d not between 0 and 3.\n",
60 trans->dir);
61 return AVERROR(EINVAL);
62 }
63 return 0;
64 }
65
66 static int query_formats(AVFilterContext *ctx)
67 {
68 enum AVPixelFormat pix_fmts[] = {
69 AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
70 AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
71 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
72 AV_PIX_FMT_RGB565BE, AV_PIX_FMT_RGB565LE,
73 AV_PIX_FMT_RGB555BE, AV_PIX_FMT_RGB555LE,
74 AV_PIX_FMT_BGR565BE, AV_PIX_FMT_BGR565LE,
75 AV_PIX_FMT_BGR555BE, AV_PIX_FMT_BGR555LE,
76 AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_GRAY16LE,
77 AV_PIX_FMT_YUV420P16LE, AV_PIX_FMT_YUV420P16BE,
78 AV_PIX_FMT_YUV422P16LE, AV_PIX_FMT_YUV422P16BE,
79 AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUV444P16BE,
80 AV_PIX_FMT_NV12, AV_PIX_FMT_NV21,
81 AV_PIX_FMT_RGB8, AV_PIX_FMT_BGR8,
82 AV_PIX_FMT_RGB4_BYTE, AV_PIX_FMT_BGR4_BYTE,
83 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
84 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
85 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
86 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
87 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
88 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_GRAY8,
89 AV_PIX_FMT_NONE
90 };
91
92 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
93 return 0;
94 }
95
96 static int config_props_output(AVFilterLink *outlink)
97 {
98 AVFilterContext *ctx = outlink->src;
99 TransContext *trans = ctx->priv;
100 AVFilterLink *inlink = ctx->inputs[0];
101 const AVPixFmtDescriptor *pixdesc = &av_pix_fmt_descriptors[outlink->format];
102
103 trans->hsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_w;
104 trans->vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h;
105
106 av_image_fill_max_pixsteps(trans->pixsteps, NULL, pixdesc);
107
108 outlink->w = inlink->h;
109 outlink->h = inlink->w;
110
111 if (inlink->sample_aspect_ratio.num){
112 outlink->sample_aspect_ratio = av_div_q((AVRational){1,1}, inlink->sample_aspect_ratio);
113 } else
114 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
115
116 av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n",
117 inlink->w, inlink->h, trans->dir, outlink->w, outlink->h,
118 trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise",
119 trans->dir == 0 || trans->dir == 3);
120 return 0;
121 }
122
123 static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
124 {
125 AVFilterLink *outlink = inlink->dst->outputs[0];
126 AVFilterBufferRef *buf_out;
127
128 outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE,
129 outlink->w, outlink->h);
130 if (!outlink->out_buf)
131 return AVERROR(ENOMEM);
132
133 outlink->out_buf->pts = picref->pts;
134
135 if (picref->video->pixel_aspect.num == 0) {
136 outlink->out_buf->video->pixel_aspect = picref->video->pixel_aspect;
137 } else {
138 outlink->out_buf->video->pixel_aspect.num = picref->video->pixel_aspect.den;
139 outlink->out_buf->video->pixel_aspect.den = picref->video->pixel_aspect.num;
140 }
141
142 buf_out = avfilter_ref_buffer(outlink->out_buf, ~0);
143 if (!buf_out)
144 return AVERROR(ENOMEM);
145 return ff_start_frame(outlink, buf_out);
146 }
147
148 static int end_frame(AVFilterLink *inlink)
149 {
150 TransContext *trans = inlink->dst->priv;
151 AVFilterBufferRef *inpic = inlink->cur_buf;
152 AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf;
153 AVFilterLink *outlink = inlink->dst->outputs[0];
154 int plane, ret;
155
156 for (plane = 0; outpic->data[plane]; plane++) {
157 int hsub = plane == 1 || plane == 2 ? trans->hsub : 0;
158 int vsub = plane == 1 || plane == 2 ? trans->vsub : 0;
159 int pixstep = trans->pixsteps[plane];
160 int inh = inpic->video->h>>vsub;
161 int outw = outpic->video->w>>hsub;
162 int outh = outpic->video->h>>vsub;
163 uint8_t *out, *in;
164 int outlinesize, inlinesize;
165 int x, y;
166
167 out = outpic->data[plane]; outlinesize = outpic->linesize[plane];
168 in = inpic ->data[plane]; inlinesize = inpic ->linesize[plane];
169
170 if (trans->dir&1) {
171 in += inpic->linesize[plane] * (inh-1);
172 inlinesize *= -1;
173 }
174
175 if (trans->dir&2) {
176 out += outpic->linesize[plane] * (outh-1);
177 outlinesize *= -1;
178 }
179
180 for (y = 0; y < outh; y++) {
181 switch (pixstep) {
182 case 1:
183 for (x = 0; x < outw; x++)
184 out[x] = in[x*inlinesize + y];
185 break;
186 case 2:
187 for (x = 0; x < outw; x++)
188 *((uint16_t *)(out + 2*x)) = *((uint16_t *)(in + x*inlinesize + y*2));
189 break;
190 case 3:
191 for (x = 0; x < outw; x++) {
192 int32_t v = AV_RB24(in + x*inlinesize + y*3);
193 AV_WB24(out + 3*x, v);
194 }
195 break;
196 case 4:
197 for (x = 0; x < outw; x++)
198 *((uint32_t *)(out + 4*x)) = *((uint32_t *)(in + x*inlinesize + y*4));
199 break;
200 }
201 out += outlinesize;
202 }
203 }
204
205 if ((ret = ff_draw_slice(outlink, 0, outpic->video->h, 1)) < 0 ||
206 (ret = ff_end_frame(outlink)) < 0)
207 return ret;
208 return 0;
209 }
210
211 AVFilter avfilter_vf_transpose = {
212 .name = "transpose",
213 .description = NULL_IF_CONFIG_SMALL("Transpose input video."),
214
215 .init = init,
216 .priv_size = sizeof(TransContext),
217
218 .query_formats = query_formats,
219
220 .inputs = (const AVFilterPad[]) {{ .name = "default",
221 .type = AVMEDIA_TYPE_VIDEO,
222 .start_frame = start_frame,
223 .end_frame = end_frame,
224 .min_perms = AV_PERM_READ, },
225 { .name = NULL}},
226 .outputs = (const AVFilterPad[]) {{ .name = "default",
227 .config_props = config_props_output,
228 .type = AVMEDIA_TYPE_VIDEO, },
229 { .name = NULL}},
230 };