lavfi: make avfilter_get_video_buffer() private on next bump.
[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 #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 };