lavfi: make avfilter_get_video_buffer() private on next bump.
[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 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 #include "formats.h"
33 #include "video.h"
34
35 typedef struct {
36     int hsub, vsub;
37     int pixsteps[4];
38
39     /* 0    Rotate by 90 degrees counterclockwise and vflip. */
40     /* 1    Rotate by 90 degrees clockwise.                  */
41     /* 2    Rotate by 90 degrees counterclockwise.           */
42     /* 3    Rotate by 90 degrees clockwise and vflip.        */
43     int dir;
44 } TransContext;
45
46 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
47 {
48     TransContext *trans = ctx->priv;
49     trans->dir = 0;
50
51     if (args)
52         sscanf(args, "%d", &trans->dir);
53
54     if (trans->dir < 0 || trans->dir > 3) {
55         av_log(ctx, AV_LOG_ERROR, "Invalid value %d not between 0 and 3.\n",
56                trans->dir);
57         return AVERROR(EINVAL);
58     }
59     return 0;
60 }
61
62 static int query_formats(AVFilterContext *ctx)
63 {
64     enum PixelFormat pix_fmts[] = {
65         PIX_FMT_ARGB,         PIX_FMT_RGBA,
66         PIX_FMT_ABGR,         PIX_FMT_BGRA,
67         PIX_FMT_RGB24,        PIX_FMT_BGR24,
68         PIX_FMT_RGB565BE,     PIX_FMT_RGB565LE,
69         PIX_FMT_RGB555BE,     PIX_FMT_RGB555LE,
70         PIX_FMT_BGR565BE,     PIX_FMT_BGR565LE,
71         PIX_FMT_BGR555BE,     PIX_FMT_BGR555LE,
72         PIX_FMT_GRAY16BE,     PIX_FMT_GRAY16LE,
73         PIX_FMT_YUV420P16LE,  PIX_FMT_YUV420P16BE,
74         PIX_FMT_YUV422P16LE,  PIX_FMT_YUV422P16BE,
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_YUV422P,
80         PIX_FMT_YUV420P,      PIX_FMT_YUVJ420P,
81         PIX_FMT_YUV411P,      PIX_FMT_YUV410P,
82         PIX_FMT_YUVJ444P,     PIX_FMT_YUVJ422P,
83         PIX_FMT_YUV440P,      PIX_FMT_YUVJ440P,
84         PIX_FMT_YUVA420P,     PIX_FMT_GRAY8,
85         PIX_FMT_NONE
86     };
87
88     ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
89     return 0;
90 }
91
92 static int config_props_output(AVFilterLink *outlink)
93 {
94     AVFilterContext *ctx = outlink->src;
95     TransContext *trans = ctx->priv;
96     AVFilterLink *inlink = ctx->inputs[0];
97     const AVPixFmtDescriptor *pixdesc = &av_pix_fmt_descriptors[outlink->format];
98
99     trans->hsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_w;
100     trans->vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h;
101
102     av_image_fill_max_pixsteps(trans->pixsteps, NULL, pixdesc);
103
104     outlink->w = inlink->h;
105     outlink->h = inlink->w;
106
107     if (inlink->sample_aspect_ratio.num){
108         outlink->sample_aspect_ratio = av_div_q((AVRational){1,1}, inlink->sample_aspect_ratio);
109     } else
110         outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
111
112     av_log(ctx, AV_LOG_INFO, "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n",
113            inlink->w, inlink->h, trans->dir, outlink->w, outlink->h,
114            trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise",
115            trans->dir == 0 || trans->dir == 3);
116     return 0;
117 }
118
119 static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
120 {
121     AVFilterLink *outlink = inlink->dst->outputs[0];
122
123     outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE,
124                                            outlink->w, outlink->h);
125     outlink->out_buf->pts = picref->pts;
126
127     if (picref->video->pixel_aspect.num == 0) {
128         outlink->out_buf->video->pixel_aspect = picref->video->pixel_aspect;
129     } else {
130         outlink->out_buf->video->pixel_aspect.num = picref->video->pixel_aspect.den;
131         outlink->out_buf->video->pixel_aspect.den = picref->video->pixel_aspect.num;
132     }
133
134     ff_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
135 }
136
137 static void end_frame(AVFilterLink *inlink)
138 {
139     TransContext *trans = inlink->dst->priv;
140     AVFilterBufferRef *inpic  = inlink->cur_buf;
141     AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf;
142     AVFilterLink *outlink = inlink->dst->outputs[0];
143     int plane;
144
145     for (plane = 0; outpic->data[plane]; plane++) {
146         int hsub = plane == 1 || plane == 2 ? trans->hsub : 0;
147         int vsub = plane == 1 || plane == 2 ? trans->vsub : 0;
148         int pixstep = trans->pixsteps[plane];
149         int inh  = inpic->video->h>>vsub;
150         int outw = outpic->video->w>>hsub;
151         int outh = outpic->video->h>>vsub;
152         uint8_t *out, *in;
153         int outlinesize, inlinesize;
154         int x, y;
155
156         out = outpic->data[plane]; outlinesize = outpic->linesize[plane];
157         in  = inpic ->data[plane]; inlinesize  = inpic ->linesize[plane];
158
159         if (trans->dir&1) {
160             in +=  inpic->linesize[plane] * (inh-1);
161             inlinesize *= -1;
162         }
163
164         if (trans->dir&2) {
165             out += outpic->linesize[plane] * (outh-1);
166             outlinesize *= -1;
167         }
168
169         for (y = 0; y < outh; y++) {
170             switch (pixstep) {
171             case 1:
172                 for (x = 0; x < outw; x++)
173                     out[x] = in[x*inlinesize + y];
174                 break;
175             case 2:
176                 for (x = 0; x < outw; x++)
177                     *((uint16_t *)(out + 2*x)) = *((uint16_t *)(in + x*inlinesize + y*2));
178                 break;
179             case 3:
180                 for (x = 0; x < outw; x++) {
181                     int32_t v = AV_RB24(in + x*inlinesize + y*3);
182                     AV_WB24(out + 3*x, v);
183                 }
184                 break;
185             case 4:
186                 for (x = 0; x < outw; x++)
187                     *((uint32_t *)(out + 4*x)) = *((uint32_t *)(in + x*inlinesize + y*4));
188                 break;
189             }
190             out += outlinesize;
191         }
192     }
193
194     avfilter_unref_buffer(inpic);
195     ff_draw_slice(outlink, 0, outpic->video->h, 1);
196     ff_end_frame(outlink);
197     avfilter_unref_buffer(outpic);
198 }
199
200 AVFilter avfilter_vf_transpose = {
201     .name      = "transpose",
202     .description = NULL_IF_CONFIG_SMALL("Transpose input video."),
203
204     .init = init,
205     .priv_size = sizeof(TransContext),
206
207     .query_formats = query_formats,
208
209     .inputs    = (AVFilterPad[]) {{ .name            = "default",
210                                     .type            = AVMEDIA_TYPE_VIDEO,
211                                     .start_frame     = start_frame,
212                                     .end_frame       = end_frame,
213                                     .min_perms       = AV_PERM_READ, },
214                                   { .name = NULL}},
215     .outputs   = (AVFilterPad[]) {{ .name            = "default",
216                                     .config_props    = config_props_output,
217                                     .type            = AVMEDIA_TYPE_VIDEO, },
218                                   { .name = NULL}},
219 };