546f149e5b5253c61d9a49ea34069c70002dccd6
[ffmpeg.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 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 "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 PixelFormat pix_fmts[] = {
69         PIX_FMT_ARGB,         PIX_FMT_RGBA,
70         PIX_FMT_ABGR,         PIX_FMT_BGRA,
71         PIX_FMT_RGB24,        PIX_FMT_BGR24,
72         PIX_FMT_RGB565BE,     PIX_FMT_RGB565LE,
73         PIX_FMT_RGB555BE,     PIX_FMT_RGB555LE,
74         PIX_FMT_BGR565BE,     PIX_FMT_BGR565LE,
75         PIX_FMT_BGR555BE,     PIX_FMT_BGR555LE,
76         PIX_FMT_GRAY16BE,     PIX_FMT_GRAY16LE,
77         PIX_FMT_YUV420P16LE,  PIX_FMT_YUV420P16BE,
78         PIX_FMT_YUV444P16LE,  PIX_FMT_YUV444P16BE,
79         PIX_FMT_NV12,         PIX_FMT_NV21,
80         PIX_FMT_RGB8,         PIX_FMT_BGR8,
81         PIX_FMT_RGB4_BYTE,    PIX_FMT_BGR4_BYTE,
82         PIX_FMT_YUV444P,      PIX_FMT_YUVJ444P,
83         PIX_FMT_YUV420P,      PIX_FMT_YUVJ420P,
84         PIX_FMT_YUV410P,
85         PIX_FMT_YUVA420P,     PIX_FMT_GRAY8,
86         PIX_FMT_NONE
87     };
88
89     ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
90     return 0;
91 }
92
93 static int config_props_output(AVFilterLink *outlink)
94 {
95     AVFilterContext *ctx = outlink->src;
96     TransContext *trans = ctx->priv;
97     AVFilterLink *inlink = ctx->inputs[0];
98     const AVPixFmtDescriptor *pixdesc = &av_pix_fmt_descriptors[outlink->format];
99
100     trans->hsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_w;
101     trans->vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h;
102
103     av_image_fill_max_pixsteps(trans->pixsteps, NULL, pixdesc);
104
105     outlink->w = inlink->h;
106     outlink->h = inlink->w;
107
108     if (inlink->sample_aspect_ratio.num){
109         outlink->sample_aspect_ratio = av_div_q((AVRational){1,1}, inlink->sample_aspect_ratio);
110     } else
111         outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
112
113     av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n",
114            inlink->w, inlink->h, trans->dir, outlink->w, outlink->h,
115            trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise",
116            trans->dir == 0 || trans->dir == 3);
117     return 0;
118 }
119
120 static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
121 {
122     AVFilterLink *outlink = inlink->dst->outputs[0];
123     AVFilterBufferRef *buf_out;
124
125     outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE,
126                                            outlink->w, outlink->h);
127     if (!outlink->out_buf)
128         return AVERROR(ENOMEM);
129
130     outlink->out_buf->pts = picref->pts;
131
132     if (picref->video->sample_aspect_ratio.num == 0) {
133         outlink->out_buf->video->sample_aspect_ratio = picref->video->sample_aspect_ratio;
134     } else {
135         outlink->out_buf->video->sample_aspect_ratio.num = picref->video->sample_aspect_ratio.den;
136         outlink->out_buf->video->sample_aspect_ratio.den = picref->video->sample_aspect_ratio.num;
137     }
138
139     buf_out = avfilter_ref_buffer(outlink->out_buf, ~0);
140     if (!buf_out)
141         return AVERROR(ENOMEM);
142     return ff_start_frame(outlink, buf_out);
143 }
144
145 static int end_frame(AVFilterLink *inlink)
146 {
147     TransContext *trans = inlink->dst->priv;
148     AVFilterBufferRef *inpic  = inlink->cur_buf;
149     AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf;
150     AVFilterLink *outlink = inlink->dst->outputs[0];
151     int plane, ret;
152
153     for (plane = 0; outpic->data[plane]; plane++) {
154         int hsub = plane == 1 || plane == 2 ? trans->hsub : 0;
155         int vsub = plane == 1 || plane == 2 ? trans->vsub : 0;
156         int pixstep = trans->pixsteps[plane];
157         int inh  = inpic->video->h>>vsub;
158         int outw = outpic->video->w>>hsub;
159         int outh = outpic->video->h>>vsub;
160         uint8_t *out, *in;
161         int outlinesize, inlinesize;
162         int x, y;
163
164         out = outpic->data[plane]; outlinesize = outpic->linesize[plane];
165         in  = inpic ->data[plane]; inlinesize  = inpic ->linesize[plane];
166
167         if (trans->dir&1) {
168             in +=  inpic->linesize[plane] * (inh-1);
169             inlinesize *= -1;
170         }
171
172         if (trans->dir&2) {
173             out += outpic->linesize[plane] * (outh-1);
174             outlinesize *= -1;
175         }
176
177         for (y = 0; y < outh; y++) {
178             switch (pixstep) {
179             case 1:
180                 for (x = 0; x < outw; x++)
181                     out[x] = in[x*inlinesize + y];
182                 break;
183             case 2:
184                 for (x = 0; x < outw; x++)
185                     *((uint16_t *)(out + 2*x)) = *((uint16_t *)(in + x*inlinesize + y*2));
186                 break;
187             case 3:
188                 for (x = 0; x < outw; x++) {
189                     int32_t v = AV_RB24(in + x*inlinesize + y*3);
190                     AV_WB24(out + 3*x, v);
191                 }
192                 break;
193             case 4:
194                 for (x = 0; x < outw; x++)
195                     *((uint32_t *)(out + 4*x)) = *((uint32_t *)(in + x*inlinesize + y*4));
196                 break;
197             }
198             out += outlinesize;
199         }
200     }
201
202     if ((ret = ff_draw_slice(outlink, 0, outpic->video->h, 1)) < 0 ||
203         (ret = ff_end_frame(outlink)) < 0)
204         return ret;
205     return 0;
206 }
207
208 static int null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { return 0; }
209
210 AVFilter avfilter_vf_transpose = {
211     .name      = "transpose",
212     .description = NULL_IF_CONFIG_SMALL("Transpose input video."),
213
214     .init = init,
215     .priv_size = sizeof(TransContext),
216
217     .query_formats = query_formats,
218
219     .inputs    = (const AVFilterPad[]) {{ .name            = "default",
220                                           .type            = AVMEDIA_TYPE_VIDEO,
221                                           .start_frame     = start_frame,
222                                           .draw_slice      = null_draw_slice,
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 };