mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
185d1f3bfc
Signed-off-by: Paul B Mahol <onemda@gmail.com>
281 lines
9.3 KiB
C
281 lines
9.3 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 FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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/intreadwrite.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/internal.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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typedef enum {
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TRANSPOSE_PT_TYPE_NONE,
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TRANSPOSE_PT_TYPE_LANDSCAPE,
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TRANSPOSE_PT_TYPE_PORTRAIT,
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} PassthroughType;
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typedef struct {
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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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/* 0 Rotate by 90 degrees counterclockwise and vflip. */
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/* 1 Rotate by 90 degrees clockwise. */
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/* 2 Rotate by 90 degrees counterclockwise. */
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/* 3 Rotate by 90 degrees clockwise and vflip. */
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int dir;
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PassthroughType passthrough; ///< landscape passthrough mode enabled
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} TransContext;
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#define OFFSET(x) offsetof(TransContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption transpose_options[] = {
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{ "dir", "set transpose direction", OFFSET(dir), AV_OPT_TYPE_INT, {.i64=0}, 0, 7, FLAGS },
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{ "passthrough", "do not apply transposition if the input matches the specified geometry",
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OFFSET(passthrough), AV_OPT_TYPE_INT, {.i64=TRANSPOSE_PT_TYPE_NONE}, 0, INT_MAX, FLAGS, "passthrough" },
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{ "none", "always apply transposition", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_NONE}, INT_MIN, INT_MAX, FLAGS, "passthrough" },
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{ "portrait", "preserve portrait geometry", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_PORTRAIT}, INT_MIN, INT_MAX, FLAGS, "passthrough" },
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{ "landscape", "preserve landscape geometry", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_LANDSCAPE}, INT_MIN, INT_MAX, FLAGS, "passthrough" },
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{ NULL },
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};
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AVFILTER_DEFINE_CLASS(transpose);
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static av_cold int init(AVFilterContext *ctx, const char *args)
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{
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TransContext *trans = ctx->priv;
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const char *shorthand[] = { "dir", "passthrough", NULL };
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trans->class = &transpose_class;
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av_opt_set_defaults(trans);
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return av_opt_set_from_string(trans, args, shorthand, "=", ":");
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}
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static int query_formats(AVFilterContext *ctx)
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{
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static const 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_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_YUVJ444P,
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUV410P,
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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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if (trans->dir&4) {
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av_log(ctx, AV_LOG_WARNING,
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"dir values greater than 3 are deprecated, use the passthrough option instead\n");
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trans->dir &= 3;
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trans->passthrough = TRANSPOSE_PT_TYPE_LANDSCAPE;
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}
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if ((inlink->w >= inlink->h && trans->passthrough == TRANSPOSE_PT_TYPE_LANDSCAPE) ||
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(inlink->w <= inlink->h && trans->passthrough == TRANSPOSE_PT_TYPE_PORTRAIT)) {
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av_log(ctx, AV_LOG_VERBOSE,
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"w:%d h:%d -> w:%d h:%d (passthrough mode)\n",
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inlink->w, inlink->h, inlink->w, inlink->h);
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return 0;
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} else {
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trans->passthrough = TRANSPOSE_PT_TYPE_NONE;
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}
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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}, 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, "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 AVFilterBufferRef *get_video_buffer(AVFilterLink *inlink, int perms, int w, int h)
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{
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TransContext *trans = inlink->dst->priv;
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return trans->passthrough ?
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ff_null_get_video_buffer (inlink, perms, w, h) :
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ff_default_get_video_buffer(inlink, perms, w, h);
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}
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static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *in)
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{
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TransContext *trans = inlink->dst->priv;
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AVFilterLink *outlink = inlink->dst->outputs[0];
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AVFilterBufferRef *out;
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int plane;
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if (trans->passthrough)
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return ff_filter_frame(outlink, in);
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out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
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if (!out) {
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avfilter_unref_bufferp(&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->video->sample_aspect_ratio.num == 0) {
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out->video->sample_aspect_ratio = in->video->sample_aspect_ratio;
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} else {
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out->video->sample_aspect_ratio.num = in->video->sample_aspect_ratio.den;
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out->video->sample_aspect_ratio.den = in->video->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->video->h>>vsub;
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int outw = out->video->w>>hsub;
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int outh = out->video->h>>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)) = *((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)) = *((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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avfilter_unref_bufferp(&in);
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return ff_filter_frame(outlink, out);
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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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.get_video_buffer= get_video_buffer,
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.filter_frame = filter_frame,
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.min_perms = AV_PERM_READ,
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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 avfilter_vf_transpose = {
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.name = "transpose",
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.description = NULL_IF_CONFIG_SMALL("Transpose input video."),
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.init = init,
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.priv_size = sizeof(TransContext),
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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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.priv_class = &transpose_class,
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};
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