Merge commit '1470ce21cec5ee26e106e2a884c26bbf84e5aaea'
[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 "libavutil/intreadwrite.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/imgutils.h"
31 #include "avfilter.h"
32 #include "formats.h"
33 #include "internal.h"
34 #include "video.h"
35
36 typedef struct {
37     int hsub, vsub;
38     int pixsteps[4];
39
40     /* 0    Rotate by 90 degrees counterclockwise and vflip. */
41     /* 1    Rotate by 90 degrees clockwise.                  */
42     /* 2    Rotate by 90 degrees counterclockwise.           */
43     /* 3    Rotate by 90 degrees clockwise and vflip.        */
44     int dir;
45 } TransContext;
46
47 static av_cold int init(AVFilterContext *ctx, const char *args)
48 {
49     TransContext *trans = ctx->priv;
50     trans->dir = 0;
51
52     if (args)
53         sscanf(args, "%d", &trans->dir);
54
55     if (trans->dir < 0 || trans->dir > 3) {
56         av_log(ctx, AV_LOG_ERROR, "Invalid value %d not between 0 and 3.\n",
57                trans->dir);
58         return AVERROR(EINVAL);
59     }
60     return 0;
61 }
62
63 static int query_formats(AVFilterContext *ctx)
64 {
65     enum PixelFormat pix_fmts[] = {
66         PIX_FMT_ARGB,         PIX_FMT_RGBA,
67         PIX_FMT_ABGR,         PIX_FMT_BGRA,
68         PIX_FMT_RGB24,        PIX_FMT_BGR24,
69         PIX_FMT_RGB565BE,     PIX_FMT_RGB565LE,
70         PIX_FMT_RGB555BE,     PIX_FMT_RGB555LE,
71         PIX_FMT_BGR565BE,     PIX_FMT_BGR565LE,
72         PIX_FMT_BGR555BE,     PIX_FMT_BGR555LE,
73         PIX_FMT_GRAY16BE,     PIX_FMT_GRAY16LE,
74         PIX_FMT_YUV420P16LE,  PIX_FMT_YUV420P16BE,
75         PIX_FMT_YUV444P16LE,  PIX_FMT_YUV444P16BE,
76         PIX_FMT_NV12,         PIX_FMT_NV21,
77         PIX_FMT_RGB8,         PIX_FMT_BGR8,
78         PIX_FMT_RGB4_BYTE,    PIX_FMT_BGR4_BYTE,
79         PIX_FMT_YUV444P,      PIX_FMT_YUVJ444P,
80         PIX_FMT_YUV420P,      PIX_FMT_YUVJ420P,
81         PIX_FMT_YUV410P,
82         PIX_FMT_YUVA420P,     PIX_FMT_GRAY8,
83         PIX_FMT_NONE
84     };
85
86     ff_set_common_formats(ctx, ff_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_VERBOSE, "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 = ff_get_video_buffer(outlink, AV_PERM_WRITE,
122                                            outlink->w, outlink->h);
123     outlink->out_buf->pts = picref->pts;
124
125     if (picref->video->sample_aspect_ratio.num == 0) {
126         outlink->out_buf->video->sample_aspect_ratio = picref->video->sample_aspect_ratio;
127     } else {
128         outlink->out_buf->video->sample_aspect_ratio.num = picref->video->sample_aspect_ratio.den;
129         outlink->out_buf->video->sample_aspect_ratio.den = picref->video->sample_aspect_ratio.num;
130     }
131
132     ff_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     ff_draw_slice(outlink, 0, outpic->video->h, 1);
193     ff_end_frame(outlink);
194 }
195
196 static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
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    = (const AVFilterPad[]) {{ .name            = "default",
208                                           .type            = AVMEDIA_TYPE_VIDEO,
209                                           .start_frame     = start_frame,
210                                           .draw_slice      = null_draw_slice,
211                                           .end_frame       = end_frame,
212                                           .min_perms       = AV_PERM_READ, },
213                                         { .name = NULL}},
214     .outputs   = (const AVFilterPad[]) {{ .name            = "default",
215                                           .config_props    = config_props_output,
216                                           .type            = AVMEDIA_TYPE_VIDEO, },
217                                         { .name = NULL}},
218 };