244 lines
7.8 KiB
C
244 lines
7.8 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/intreadwrite.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 struct {
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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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} TransContext;
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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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trans->dir = 0;
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if (args)
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sscanf(args, "%d", &trans->dir);
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if (trans->dir < 0 || trans->dir > 3) {
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av_log(ctx, AV_LOG_ERROR, "Invalid value %d not between 0 and 3.\n",
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trans->dir);
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return AVERROR(EINVAL);
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}
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return 0;
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}
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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}, 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 int start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
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{
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AVFilterLink *outlink = inlink->dst->outputs[0];
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AVFilterBufferRef *buf_out;
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outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE,
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outlink->w, outlink->h);
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if (!outlink->out_buf)
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return AVERROR(ENOMEM);
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outlink->out_buf->pts = picref->pts;
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if (picref->video->pixel_aspect.num == 0) {
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outlink->out_buf->video->pixel_aspect = picref->video->pixel_aspect;
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} else {
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outlink->out_buf->video->pixel_aspect.num = picref->video->pixel_aspect.den;
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outlink->out_buf->video->pixel_aspect.den = picref->video->pixel_aspect.num;
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}
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buf_out = avfilter_ref_buffer(outlink->out_buf, ~0);
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if (!buf_out)
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return AVERROR(ENOMEM);
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return ff_start_frame(outlink, buf_out);
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}
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static int end_frame(AVFilterLink *inlink)
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{
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TransContext *trans = inlink->dst->priv;
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AVFilterBufferRef *inpic = inlink->cur_buf;
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AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf;
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AVFilterLink *outlink = inlink->dst->outputs[0];
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int plane, ret;
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for (plane = 0; outpic->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 = inpic->video->h>>vsub;
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int outw = outpic->video->w>>hsub;
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int outh = outpic->video->h>>vsub;
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uint8_t *out, *in;
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int outlinesize, inlinesize;
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int x, y;
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out = outpic->data[plane]; outlinesize = outpic->linesize[plane];
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in = inpic ->data[plane]; inlinesize = inpic ->linesize[plane];
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if (trans->dir&1) {
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in += inpic->linesize[plane] * (inh-1);
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inlinesize *= -1;
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}
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if (trans->dir&2) {
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out += outpic->linesize[plane] * (outh-1);
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outlinesize *= -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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out[x] = in[x*inlinesize + 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 *)(out + 2*x)) = *((uint16_t *)(in + x*inlinesize + 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(in + x*inlinesize + y*3);
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AV_WB24(out + 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 *)(out + 4*x)) = *((uint32_t *)(in + x*inlinesize + y*4));
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break;
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}
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out += outlinesize;
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}
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}
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if ((ret = ff_draw_slice(outlink, 0, outpic->video->h, 1)) < 0 ||
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(ret = ff_end_frame(outlink)) < 0)
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return ret;
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return 0;
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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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.start_frame = start_frame,
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.end_frame = end_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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};
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