mirror of https://git.ffmpeg.org/ffmpeg.git
241 lines
7.9 KiB
C
241 lines
7.9 KiB
C
/*
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* Copyright (c) 2010 Stefano Sabatini
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* Copyright (c) 2008 Vitor Sessak
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* transposition filter
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* Based on MPlayer libmpcodecs/vf_rotate.c.
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*/
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#include <stdio.h>
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#include "libavutil/imgutils.h"
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#include "libavutil/internal.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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enum TransposeDir {
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TRANSPOSE_CCLOCK_FLIP,
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TRANSPOSE_CLOCK,
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TRANSPOSE_CCLOCK,
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TRANSPOSE_CLOCK_FLIP,
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};
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typedef struct TransContext {
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const AVClass *class;
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int hsub, vsub;
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int pixsteps[4];
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enum TransposeDir dir;
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} TransContext;
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static int query_formats(AVFilterContext *ctx)
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{
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enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
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AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
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AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
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AV_PIX_FMT_RGB565BE, AV_PIX_FMT_RGB565LE,
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AV_PIX_FMT_RGB555BE, AV_PIX_FMT_RGB555LE,
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AV_PIX_FMT_BGR565BE, AV_PIX_FMT_BGR565LE,
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AV_PIX_FMT_BGR555BE, AV_PIX_FMT_BGR555LE,
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AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_GRAY16LE,
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AV_PIX_FMT_YUV420P16LE, AV_PIX_FMT_YUV420P16BE,
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AV_PIX_FMT_YUV422P16LE, AV_PIX_FMT_YUV422P16BE,
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AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUV444P16BE,
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AV_PIX_FMT_NV12, AV_PIX_FMT_NV21,
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AV_PIX_FMT_RGB8, AV_PIX_FMT_BGR8,
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AV_PIX_FMT_RGB4_BYTE, AV_PIX_FMT_BGR4_BYTE,
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
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AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
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AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_YUVA420P, AV_PIX_FMT_GRAY8,
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AV_PIX_FMT_NONE
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};
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ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
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return 0;
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}
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static int config_props_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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TransContext *trans = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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const AVPixFmtDescriptor *desc_out = av_pix_fmt_desc_get(outlink->format);
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const AVPixFmtDescriptor *desc_in = av_pix_fmt_desc_get(inlink->format);
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trans->hsub = desc_in->log2_chroma_w;
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trans->vsub = desc_in->log2_chroma_h;
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av_image_fill_max_pixsteps(trans->pixsteps, NULL, desc_out);
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outlink->w = inlink->h;
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outlink->h = inlink->w;
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if (inlink->sample_aspect_ratio.num)
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outlink->sample_aspect_ratio = av_div_q((AVRational) { 1, 1 },
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inlink->sample_aspect_ratio);
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else
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outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
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av_log(ctx, AV_LOG_VERBOSE,
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"w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n",
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inlink->w, inlink->h, trans->dir, outlink->w, outlink->h,
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trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise",
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trans->dir == 0 || trans->dir == 3);
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return 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterLink *outlink = inlink->dst->outputs[0];
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TransContext *trans = inlink->dst->priv;
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AVFrame *out;
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int plane;
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out) {
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av_frame_free(&in);
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return AVERROR(ENOMEM);
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}
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out->pts = in->pts;
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if (in->sample_aspect_ratio.num == 0) {
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out->sample_aspect_ratio = in->sample_aspect_ratio;
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} else {
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out->sample_aspect_ratio.num = in->sample_aspect_ratio.den;
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out->sample_aspect_ratio.den = in->sample_aspect_ratio.num;
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}
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for (plane = 0; out->data[plane]; plane++) {
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int hsub = plane == 1 || plane == 2 ? trans->hsub : 0;
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int vsub = plane == 1 || plane == 2 ? trans->vsub : 0;
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int pixstep = trans->pixsteps[plane];
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int inh = in->height >> vsub;
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int outw = out->width >> hsub;
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int outh = out->height >> vsub;
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uint8_t *dst, *src;
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int dstlinesize, srclinesize;
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int x, y;
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dst = out->data[plane];
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dstlinesize = out->linesize[plane];
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src = in->data[plane];
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srclinesize = in->linesize[plane];
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if (trans->dir & 1) {
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src += in->linesize[plane] * (inh - 1);
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srclinesize *= -1;
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}
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if (trans->dir & 2) {
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dst += out->linesize[plane] * (outh - 1);
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dstlinesize *= -1;
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}
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for (y = 0; y < outh; y++) {
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switch (pixstep) {
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case 1:
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for (x = 0; x < outw; x++)
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dst[x] = src[x * srclinesize + y];
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break;
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case 2:
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for (x = 0; x < outw; x++)
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*((uint16_t *)(dst + 2 * x)) =
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*((uint16_t *)(src + x * srclinesize + y * 2));
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break;
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case 3:
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for (x = 0; x < outw; x++) {
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int32_t v = AV_RB24(src + x * srclinesize + y * 3);
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AV_WB24(dst + 3 * x, v);
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}
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break;
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case 4:
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for (x = 0; x < outw; x++)
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*((uint32_t *)(dst + 4 * x)) =
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*((uint32_t *)(src + x * srclinesize + y * 4));
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break;
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}
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dst += dstlinesize;
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}
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}
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av_frame_free(&in);
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return ff_filter_frame(outlink, out);
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}
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#define OFFSET(x) offsetof(TransContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption options[] = {
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{ "dir", "Transpose direction", OFFSET(dir), AV_OPT_TYPE_INT, { .i64 = TRANSPOSE_CCLOCK_FLIP },
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TRANSPOSE_CCLOCK_FLIP, TRANSPOSE_CLOCK_FLIP, FLAGS, "dir" },
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{ "cclock_flip", "counter-clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK_FLIP }, .unit = "dir" },
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{ "clock", "clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK }, .unit = "dir" },
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{ "cclock", "counter-clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK }, .unit = "dir" },
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{ "clock_flip", "clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK_FLIP }, .unit = "dir" },
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{ NULL },
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};
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static const AVClass transpose_class = {
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.class_name = "transpose",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const AVFilterPad avfilter_vf_transpose_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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static const AVFilterPad avfilter_vf_transpose_outputs[] = {
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{
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.name = "default",
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.config_props = config_props_output,
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{ NULL }
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};
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AVFilter ff_vf_transpose = {
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.name = "transpose",
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.description = NULL_IF_CONFIG_SMALL("Transpose input video."),
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.priv_size = sizeof(TransContext),
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.priv_class = &transpose_class,
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.query_formats = query_formats,
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.inputs = avfilter_vf_transpose_inputs,
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.outputs = avfilter_vf_transpose_outputs,
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};
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