a0ec67c4267fc7d278e01791379bf8ae4fbf943b
[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 "libavutil/intreadwrite.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/imgutils.h"
31 #include "avfilter.h"
32
33 typedef struct {
34 int hsub, vsub;
35 int pixsteps[4];
36
37 /* 0 Rotate by 90 degrees counterclockwise and vflip. */
38 /* 1 Rotate by 90 degrees clockwise. */
39 /* 2 Rotate by 90 degrees counterclockwise. */
40 /* 3 Rotate by 90 degrees clockwise and vflip. */
41 int dir;
42 } TransContext;
43
44 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
45 {
46 TransContext *trans = ctx->priv;
47 trans->dir = 0;
48
49 if (args)
50 sscanf(args, "%d", &trans->dir);
51
52 if (trans->dir < 0 || trans->dir > 3) {
53 av_log(ctx, AV_LOG_ERROR, "Invalid value %d not between 0 and 3.\n",
54 trans->dir);
55 return AVERROR(EINVAL);
56 }
57 return 0;
58 }
59
60 static int query_formats(AVFilterContext *ctx)
61 {
62 enum PixelFormat pix_fmts[] = {
63 PIX_FMT_ARGB, PIX_FMT_RGBA,
64 PIX_FMT_ABGR, PIX_FMT_BGRA,
65 PIX_FMT_RGB24, PIX_FMT_BGR24,
66 PIX_FMT_RGB565BE, PIX_FMT_RGB565LE,
67 PIX_FMT_RGB555BE, PIX_FMT_RGB555LE,
68 PIX_FMT_BGR565BE, PIX_FMT_BGR565LE,
69 PIX_FMT_BGR555BE, PIX_FMT_BGR555LE,
70 PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE,
71 PIX_FMT_YUV420P16LE, PIX_FMT_YUV420P16BE,
72 PIX_FMT_YUV422P16LE, PIX_FMT_YUV422P16BE,
73 PIX_FMT_YUV444P16LE, PIX_FMT_YUV444P16BE,
74 PIX_FMT_NV12, PIX_FMT_NV21,
75 PIX_FMT_RGB8, PIX_FMT_BGR8,
76 PIX_FMT_RGB4_BYTE, PIX_FMT_BGR4_BYTE,
77 PIX_FMT_YUV444P, PIX_FMT_YUV422P,
78 PIX_FMT_YUV420P, PIX_FMT_YUVJ420P,
79 PIX_FMT_YUV411P, PIX_FMT_YUV410P,
80 PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P,
81 PIX_FMT_YUV440P, PIX_FMT_YUVJ440P,
82 PIX_FMT_YUVA420P, PIX_FMT_GRAY8,
83 PIX_FMT_NONE
84 };
85
86 avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
87 return 0;
88 }
89
90 static int config_props_output(AVFilterLink *outlink)
91 {
92 AVFilterContext *ctx = outlink->src;
93 TransContext *trans = ctx->priv;
94 AVFilterLink *inlink = ctx->inputs[0];
95 const AVPixFmtDescriptor *pixdesc = &av_pix_fmt_descriptors[outlink->format];
96
97 trans->hsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_w;
98 trans->vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h;
99
100 av_image_fill_max_pixsteps(trans->pixsteps, NULL, pixdesc);
101
102 outlink->w = inlink->h;
103 outlink->h = inlink->w;
104
105 if (inlink->sample_aspect_ratio.num){
106 outlink->sample_aspect_ratio = av_div_q((AVRational){1,1}, inlink->sample_aspect_ratio);
107 } else
108 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
109
110 av_log(ctx, AV_LOG_INFO, "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n",
111 inlink->w, inlink->h, trans->dir, outlink->w, outlink->h,
112 trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise",
113 trans->dir == 0 || trans->dir == 3);
114 return 0;
115 }
116
117 static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
118 {
119 AVFilterLink *outlink = inlink->dst->outputs[0];
120
121 outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
122 outlink->w, outlink->h);
123 outlink->out_buf->pts = picref->pts;
124
125 if (picref->video->pixel_aspect.num == 0) {
126 outlink->out_buf->video->pixel_aspect = picref->video->pixel_aspect;
127 } else {
128 outlink->out_buf->video->pixel_aspect.num = picref->video->pixel_aspect.den;
129 outlink->out_buf->video->pixel_aspect.den = picref->video->pixel_aspect.num;
130 }
131
132 avfilter_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
133 }
134
135 static void end_frame(AVFilterLink *inlink)
136 {
137 TransContext *trans = inlink->dst->priv;
138 AVFilterBufferRef *inpic = inlink->cur_buf;
139 AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf;
140 AVFilterLink *outlink = inlink->dst->outputs[0];
141 int plane;
142
143 for (plane = 0; outpic->data[plane]; plane++) {
144 int hsub = plane == 1 || plane == 2 ? trans->hsub : 0;
145 int vsub = plane == 1 || plane == 2 ? trans->vsub : 0;
146 int pixstep = trans->pixsteps[plane];
147 int inh = inpic->video->h>>vsub;
148 int outw = outpic->video->w>>hsub;
149 int outh = outpic->video->h>>vsub;
150 uint8_t *out, *in;
151 int outlinesize, inlinesize;
152 int x, y;
153
154 out = outpic->data[plane]; outlinesize = outpic->linesize[plane];
155 in = inpic ->data[plane]; inlinesize = inpic ->linesize[plane];
156
157 if (trans->dir&1) {
158 in += inpic->linesize[plane] * (inh-1);
159 inlinesize *= -1;
160 }
161
162 if (trans->dir&2) {
163 out += outpic->linesize[plane] * (outh-1);
164 outlinesize *= -1;
165 }
166
167 for (y = 0; y < outh; y++) {
168 switch (pixstep) {
169 case 1:
170 for (x = 0; x < outw; x++)
171 out[x] = in[x*inlinesize + y];
172 break;
173 case 2:
174 for (x = 0; x < outw; x++)
175 *((uint16_t *)(out + 2*x)) = *((uint16_t *)(in + x*inlinesize + y*2));
176 break;
177 case 3:
178 for (x = 0; x < outw; x++) {
179 int32_t v = AV_RB24(in + x*inlinesize + y*3);
180 AV_WB24(out + 3*x, v);
181 }
182 break;
183 case 4:
184 for (x = 0; x < outw; x++)
185 *((uint32_t *)(out + 4*x)) = *((uint32_t *)(in + x*inlinesize + y*4));
186 break;
187 }
188 out += outlinesize;
189 }
190 }
191
192 avfilter_unref_buffer(inpic);
193 avfilter_draw_slice(outlink, 0, outpic->video->h, 1);
194 avfilter_end_frame(outlink);
195 avfilter_unref_buffer(outpic);
196 }
197
198 AVFilter avfilter_vf_transpose = {
199 .name = "transpose",
200 .description = NULL_IF_CONFIG_SMALL("Transpose input video."),
201
202 .init = init,
203 .priv_size = sizeof(TransContext),
204
205 .query_formats = query_formats,
206
207 .inputs = (AVFilterPad[]) {{ .name = "default",
208 .type = AVMEDIA_TYPE_VIDEO,
209 .start_frame = start_frame,
210 .end_frame = end_frame,
211 .min_perms = AV_PERM_READ, },
212 { .name = NULL}},
213 .outputs = (AVFilterPad[]) {{ .name = "default",
214 .config_props = config_props_output,
215 .type = AVMEDIA_TYPE_VIDEO, },
216 { .name = NULL}},
217 };