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/imgutils.h" 31#include "libavutil/internal.h" 32#include "libavutil/intreadwrite.h" 33#include "libavutil/opt.h" 34#include "libavutil/pixdesc.h" 35 36#include "avfilter.h" 37#include "formats.h" 38#include "internal.h" 39#include "video.h" 40 41typedef enum { 42 TRANSPOSE_PT_TYPE_NONE, 43 TRANSPOSE_PT_TYPE_LANDSCAPE, 44 TRANSPOSE_PT_TYPE_PORTRAIT, 45} PassthroughType; 46 47enum TransposeDir { 48 TRANSPOSE_CCLOCK_FLIP, 49 TRANSPOSE_CLOCK, 50 TRANSPOSE_CCLOCK, 51 TRANSPOSE_CLOCK_FLIP, 52}; 53 54typedef struct TransContext { 55 const AVClass *class; 56 int hsub, vsub; 57 int pixsteps[4]; 58 59 PassthroughType passthrough; ///< landscape passthrough mode enabled 60 enum TransposeDir dir; 61} TransContext; 62 63static int query_formats(AVFilterContext *ctx) 64{ 65 AVFilterFormats *pix_fmts = NULL; 66 int fmt; 67 68 for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) { 69 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt); 70 if (!(desc->flags & AV_PIX_FMT_FLAG_PAL || 71 desc->flags & AV_PIX_FMT_FLAG_HWACCEL || 72 desc->flags & AV_PIX_FMT_FLAG_BITSTREAM || 73 desc->log2_chroma_w != desc->log2_chroma_h)) 74 ff_add_format(&pix_fmts, fmt); 75 } 76 77 78 ff_set_common_formats(ctx, pix_fmts); 79 return 0; 80} 81 82static int config_props_output(AVFilterLink *outlink) 83{ 84 AVFilterContext *ctx = outlink->src; 85 TransContext *trans = ctx->priv; 86 AVFilterLink *inlink = ctx->inputs[0]; 87 const AVPixFmtDescriptor *desc_out = av_pix_fmt_desc_get(outlink->format); 88 const AVPixFmtDescriptor *desc_in = av_pix_fmt_desc_get(inlink->format); 89 90 if (trans->dir&4) { 91 av_log(ctx, AV_LOG_WARNING, 92 "dir values greater than 3 are deprecated, use the passthrough option instead\n"); 93 trans->dir &= 3; 94 trans->passthrough = TRANSPOSE_PT_TYPE_LANDSCAPE; 95 } 96 97 if ((inlink->w >= inlink->h && trans->passthrough == TRANSPOSE_PT_TYPE_LANDSCAPE) || 98 (inlink->w <= inlink->h && trans->passthrough == TRANSPOSE_PT_TYPE_PORTRAIT)) { 99 av_log(ctx, AV_LOG_VERBOSE, 100 "w:%d h:%d -> w:%d h:%d (passthrough mode)\n", 101 inlink->w, inlink->h, inlink->w, inlink->h); 102 return 0; 103 } else { 104 trans->passthrough = TRANSPOSE_PT_TYPE_NONE; 105 } 106 107 trans->hsub = desc_in->log2_chroma_w; 108 trans->vsub = desc_in->log2_chroma_h; 109 110 av_image_fill_max_pixsteps(trans->pixsteps, NULL, desc_out); 111 112 outlink->w = inlink->h; 113 outlink->h = inlink->w; 114 115 if (inlink->sample_aspect_ratio.num) 116 outlink->sample_aspect_ratio = av_div_q((AVRational) { 1, 1 }, 117 inlink->sample_aspect_ratio); 118 else 119 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; 120 121 av_log(ctx, AV_LOG_VERBOSE, 122 "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n", 123 inlink->w, inlink->h, trans->dir, outlink->w, outlink->h, 124 trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise", 125 trans->dir == 0 || trans->dir == 3); 126 return 0; 127} 128 129static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h) 130{ 131 TransContext *trans = inlink->dst->priv; 132 133 return trans->passthrough ? 134 ff_null_get_video_buffer (inlink, w, h) : 135 ff_default_get_video_buffer(inlink, w, h); 136} 137 138typedef struct ThreadData { 139 AVFrame *in, *out; 140} ThreadData; 141 142static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, 143 int nb_jobs) 144{ 145 TransContext *trans = ctx->priv; 146 ThreadData *td = arg; 147 AVFrame *out = td->out; 148 AVFrame *in = td->in; 149 int plane; 150 151 for (plane = 0; out->data[plane]; plane++) { 152 int hsub = plane == 1 || plane == 2 ? trans->hsub : 0; 153 int vsub = plane == 1 || plane == 2 ? trans->vsub : 0; 154 int pixstep = trans->pixsteps[plane]; 155 int inh = in->height >> vsub; 156 int outw = FF_CEIL_RSHIFT(out->width, hsub); 157 int outh = FF_CEIL_RSHIFT(out->height, vsub); 158 int start = (outh * jobnr ) / nb_jobs; 159 int end = (outh * (jobnr+1)) / nb_jobs; 160 uint8_t *dst, *src; 161 int dstlinesize, srclinesize; 162 int x, y; 163 164 dstlinesize = out->linesize[plane]; 165 dst = out->data[plane] + start * dstlinesize; 166 src = in->data[plane]; 167 srclinesize = in->linesize[plane]; 168 169 if (trans->dir & 1) { 170 src += in->linesize[plane] * (inh - 1); 171 srclinesize *= -1; 172 } 173 174 if (trans->dir & 2) { 175 dst = out->data[plane] + dstlinesize * (outh - start - 1); 176 dstlinesize *= -1; 177 } 178 179 switch (pixstep) { 180 case 1: 181 for (y = start; y < end; y++, dst += dstlinesize) 182 for (x = 0; x < outw; x++) 183 dst[x] = src[x * srclinesize + y]; 184 break; 185 case 2: 186 for (y = start; y < end; y++, dst += dstlinesize) { 187 for (x = 0; x < outw; x++) 188 *((uint16_t *)(dst + 2 * x)) = 189 *((uint16_t *)(src + x * srclinesize + y * 2)); 190 } 191 break; 192 case 3: 193 for (y = start; y < end; y++, dst += dstlinesize) { 194 for (x = 0; x < outw; x++) { 195 int32_t v = AV_RB24(src + x * srclinesize + y * 3); 196 AV_WB24(dst + 3 * x, v); 197 } 198 } 199 break; 200 case 4: 201 for (y = start; y < end; y++, dst += dstlinesize) { 202 for (x = 0; x < outw; x++) 203 *((uint32_t *)(dst + 4 * x)) = 204 *((uint32_t *)(src + x * srclinesize + y * 4)); 205 } 206 break; 207 case 6: 208 for (y = start; y < end; y++, dst += dstlinesize) { 209 for (x = 0; x < outw; x++) { 210 int64_t v = AV_RB48(src + x * srclinesize + y*6); 211 AV_WB48(dst + 6*x, v); 212 } 213 } 214 break; 215 case 8: 216 for (y = start; y < end; y++, dst += dstlinesize) { 217 for (x = 0; x < outw; x++) 218 *((uint64_t *)(dst + 8*x)) = *((uint64_t *)(src + x * srclinesize + y*8)); 219 } 220 break; 221 } 222 } 223 224 return 0; 225} 226 227static int filter_frame(AVFilterLink *inlink, AVFrame *in) 228{ 229 AVFilterContext *ctx = inlink->dst; 230 TransContext *trans = ctx->priv; 231 AVFilterLink *outlink = ctx->outputs[0]; 232 ThreadData td; 233 AVFrame *out; 234 235 if (trans->passthrough) 236 return ff_filter_frame(outlink, in); 237 238 out = ff_get_video_buffer(outlink, outlink->w, outlink->h); 239 if (!out) { 240 av_frame_free(&in); 241 return AVERROR(ENOMEM); 242 } 243 av_frame_copy_props(out, in); 244 245 if (in->sample_aspect_ratio.num == 0) { 246 out->sample_aspect_ratio = in->sample_aspect_ratio; 247 } else { 248 out->sample_aspect_ratio.num = in->sample_aspect_ratio.den; 249 out->sample_aspect_ratio.den = in->sample_aspect_ratio.num; 250 } 251 252 td.in = in, td.out = out; 253 ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outlink->h, ctx->graph->nb_threads)); 254 av_frame_free(&in); 255 return ff_filter_frame(outlink, out); 256} 257 258#define OFFSET(x) offsetof(TransContext, x) 259#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM 260 261static const AVOption transpose_options[] = { 262 { "dir", "set transpose direction", OFFSET(dir), AV_OPT_TYPE_INT, { .i64 = TRANSPOSE_CCLOCK_FLIP }, 0, 7, FLAGS, "dir" }, 263 { "cclock_flip", "rotate counter-clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK_FLIP }, .unit = "dir" }, 264 { "clock", "rotate clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK }, .unit = "dir" }, 265 { "cclock", "rotate counter-clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK }, .unit = "dir" }, 266 { "clock_flip", "rotate clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK_FLIP }, .unit = "dir" }, 267 268 { "passthrough", "do not apply transposition if the input matches the specified geometry", 269 OFFSET(passthrough), AV_OPT_TYPE_INT, {.i64=TRANSPOSE_PT_TYPE_NONE}, 0, INT_MAX, FLAGS, "passthrough" }, 270 { "none", "always apply transposition", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_NONE}, INT_MIN, INT_MAX, FLAGS, "passthrough" }, 271 { "portrait", "preserve portrait geometry", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_PORTRAIT}, INT_MIN, INT_MAX, FLAGS, "passthrough" }, 272 { "landscape", "preserve landscape geometry", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_LANDSCAPE}, INT_MIN, INT_MAX, FLAGS, "passthrough" }, 273 274 { NULL } 275}; 276 277AVFILTER_DEFINE_CLASS(transpose); 278 279static const AVFilterPad avfilter_vf_transpose_inputs[] = { 280 { 281 .name = "default", 282 .type = AVMEDIA_TYPE_VIDEO, 283 .get_video_buffer = get_video_buffer, 284 .filter_frame = filter_frame, 285 }, 286 { NULL } 287}; 288 289static const AVFilterPad avfilter_vf_transpose_outputs[] = { 290 { 291 .name = "default", 292 .config_props = config_props_output, 293 .type = AVMEDIA_TYPE_VIDEO, 294 }, 295 { NULL } 296}; 297 298AVFilter ff_vf_transpose = { 299 .name = "transpose", 300 .description = NULL_IF_CONFIG_SMALL("Transpose input video."), 301 .priv_size = sizeof(TransContext), 302 .priv_class = &transpose_class, 303 .query_formats = query_formats, 304 .inputs = avfilter_vf_transpose_inputs, 305 .outputs = avfilter_vf_transpose_outputs, 306 .flags = AVFILTER_FLAG_SLICE_THREADS, 307}; 308