2 * Copyright (c) 2010 Stefano Sabatini
3 * Copyright (c) 2008 Vitor Sessak
5 * This file is part of Libav.
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.
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.
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
24 * transposition filter
25 * Based on MPlayer libmpcodecs/vf_rotate.c.
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/pixdesc.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/internal.h"
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. */
50 static av_cold int init(AVFilterContext *ctx, const char *args)
52 TransContext *trans = ctx->priv;
56 sscanf(args, "%d", &trans->dir);
58 if (trans->dir < 0 || trans->dir > 3) {
59 av_log(ctx, AV_LOG_ERROR, "Invalid value %d not between 0 and 3.\n",
61 return AVERROR(EINVAL);
66 static int query_formats(AVFilterContext *ctx)
68 enum AVPixelFormat pix_fmts[] = {
69 AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
70 AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
71 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
72 AV_PIX_FMT_RGB565BE, AV_PIX_FMT_RGB565LE,
73 AV_PIX_FMT_RGB555BE, AV_PIX_FMT_RGB555LE,
74 AV_PIX_FMT_BGR565BE, AV_PIX_FMT_BGR565LE,
75 AV_PIX_FMT_BGR555BE, AV_PIX_FMT_BGR555LE,
76 AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_GRAY16LE,
77 AV_PIX_FMT_YUV420P16LE, AV_PIX_FMT_YUV420P16BE,
78 AV_PIX_FMT_YUV422P16LE, AV_PIX_FMT_YUV422P16BE,
79 AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUV444P16BE,
80 AV_PIX_FMT_NV12, AV_PIX_FMT_NV21,
81 AV_PIX_FMT_RGB8, AV_PIX_FMT_BGR8,
82 AV_PIX_FMT_RGB4_BYTE, AV_PIX_FMT_BGR4_BYTE,
83 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
84 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
85 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
86 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
87 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
88 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_GRAY8,
92 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
96 static int config_props_output(AVFilterLink *outlink)
98 AVFilterContext *ctx = outlink->src;
99 TransContext *trans = ctx->priv;
100 AVFilterLink *inlink = ctx->inputs[0];
101 const AVPixFmtDescriptor *desc_out = av_pix_fmt_desc_get(outlink->format);
102 const AVPixFmtDescriptor *desc_in = av_pix_fmt_desc_get(inlink->format);
104 trans->hsub = desc_in->log2_chroma_w;
105 trans->vsub = desc_in->log2_chroma_h;
107 av_image_fill_max_pixsteps(trans->pixsteps, NULL, desc_out);
109 outlink->w = inlink->h;
110 outlink->h = inlink->w;
112 if (inlink->sample_aspect_ratio.num){
113 outlink->sample_aspect_ratio = av_div_q((AVRational){1,1}, inlink->sample_aspect_ratio);
115 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
117 av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n",
118 inlink->w, inlink->h, trans->dir, outlink->w, outlink->h,
119 trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise",
120 trans->dir == 0 || trans->dir == 3);
124 static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *in)
126 AVFilterLink *outlink = inlink->dst->outputs[0];
127 TransContext *trans = inlink->dst->priv;
128 AVFilterBufferRef *out;
131 out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
133 avfilter_unref_bufferp(&in);
134 return AVERROR(ENOMEM);
139 if (in->video->pixel_aspect.num == 0) {
140 out->video->pixel_aspect = in->video->pixel_aspect;
142 out->video->pixel_aspect.num = in->video->pixel_aspect.den;
143 out->video->pixel_aspect.den = in->video->pixel_aspect.num;
146 for (plane = 0; out->data[plane]; plane++) {
147 int hsub = plane == 1 || plane == 2 ? trans->hsub : 0;
148 int vsub = plane == 1 || plane == 2 ? trans->vsub : 0;
149 int pixstep = trans->pixsteps[plane];
150 int inh = in->video->h>>vsub;
151 int outw = out->video->w>>hsub;
152 int outh = out->video->h>>vsub;
154 int dstlinesize, srclinesize;
157 dst = out->data[plane];
158 dstlinesize = out->linesize[plane];
159 src = in->data[plane];
160 srclinesize = in->linesize[plane];
163 src += in->linesize[plane] * (inh-1);
168 dst += out->linesize[plane] * (outh-1);
172 for (y = 0; y < outh; y++) {
175 for (x = 0; x < outw; x++)
176 dst[x] = src[x*srclinesize + y];
179 for (x = 0; x < outw; x++)
180 *((uint16_t *)(dst + 2*x)) = *((uint16_t *)(src + x*srclinesize + y*2));
183 for (x = 0; x < outw; x++) {
184 int32_t v = AV_RB24(src + x*srclinesize + y*3);
185 AV_WB24(dst + 3*x, v);
189 for (x = 0; x < outw; x++)
190 *((uint32_t *)(dst + 4*x)) = *((uint32_t *)(src + x*srclinesize + y*4));
197 avfilter_unref_bufferp(&in);
198 return ff_filter_frame(outlink, out);
201 static const AVFilterPad avfilter_vf_transpose_inputs[] = {
204 .type = AVMEDIA_TYPE_VIDEO,
205 .filter_frame = filter_frame,
206 .min_perms = AV_PERM_READ,
211 static const AVFilterPad avfilter_vf_transpose_outputs[] = {
214 .config_props = config_props_output,
215 .type = AVMEDIA_TYPE_VIDEO,
220 AVFilter avfilter_vf_transpose = {
222 .description = NULL_IF_CONFIG_SMALL("Transpose input video."),
225 .priv_size = sizeof(TransContext),
227 .query_formats = query_formats,
229 .inputs = avfilter_vf_transpose_inputs,
230 .outputs = avfilter_vf_transpose_outputs,