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/*
* Copyright (c) 2010 Stefano Sabatini
* Copyright (c) 2008 Vitor Sessak
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* transposition filter
* Based on MPlayer libmpcodecs/vf_rotate.c.
*/
#include "libavutil/intreadwrite.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "avfilter.h"
#include "formats.h"
#include "video.h"
typedef struct {
int hsub, vsub;
int pixsteps[4];
/* 0 Rotate by 90 degrees counterclockwise and vflip. */
/* 1 Rotate by 90 degrees clockwise. */
/* 2 Rotate by 90 degrees counterclockwise. */
/* 3 Rotate by 90 degrees clockwise and vflip. */
int dir;
} TransContext;
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
{
TransContext *trans = ctx->priv;
trans->dir = 0;
if (args)
sscanf(args, "%d", &trans->dir);
if (trans->dir < 0 || trans->dir > 3) {
av_log(ctx, AV_LOG_ERROR, "Invalid value %d not between 0 and 3.\n",
trans->dir);
return AVERROR(EINVAL);
}
return 0;
}
static int query_formats(AVFilterContext *ctx)
{
enum PixelFormat pix_fmts[] = {
PIX_FMT_ARGB, PIX_FMT_RGBA,
PIX_FMT_ABGR, PIX_FMT_BGRA,
PIX_FMT_RGB24, PIX_FMT_BGR24,
PIX_FMT_RGB565BE, PIX_FMT_RGB565LE,
PIX_FMT_RGB555BE, PIX_FMT_RGB555LE,
PIX_FMT_BGR565BE, PIX_FMT_BGR565LE,
PIX_FMT_BGR555BE, PIX_FMT_BGR555LE,
PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE,
PIX_FMT_YUV420P16LE, PIX_FMT_YUV420P16BE,
PIX_FMT_YUV422P16LE, PIX_FMT_YUV422P16BE,
PIX_FMT_YUV444P16LE, PIX_FMT_YUV444P16BE,
PIX_FMT_NV12, PIX_FMT_NV21,
PIX_FMT_RGB8, PIX_FMT_BGR8,
PIX_FMT_RGB4_BYTE, PIX_FMT_BGR4_BYTE,
PIX_FMT_YUV444P, PIX_FMT_YUV422P,
PIX_FMT_YUV420P, PIX_FMT_YUVJ420P,
PIX_FMT_YUV411P, PIX_FMT_YUV410P,
PIX_FMT_YUVJ444P, PIX_FMT_YUVJ422P,
PIX_FMT_YUV440P, PIX_FMT_YUVJ440P,
PIX_FMT_YUVA420P, PIX_FMT_GRAY8,
PIX_FMT_NONE
};
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
return 0;
}
static int config_props_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
TransContext *trans = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
const AVPixFmtDescriptor *pixdesc = &av_pix_fmt_descriptors[outlink->format];
trans->hsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_w;
trans->vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h;
av_image_fill_max_pixsteps(trans->pixsteps, NULL, pixdesc);
outlink->w = inlink->h;
outlink->h = inlink->w;
if (inlink->sample_aspect_ratio.num){
outlink->sample_aspect_ratio = av_div_q((AVRational){1,1}, inlink->sample_aspect_ratio);
} else
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
av_log(ctx, AV_LOG_INFO, "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n",
inlink->w, inlink->h, trans->dir, outlink->w, outlink->h,
trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise",
trans->dir == 0 || trans->dir == 3);
return 0;
}
static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
{
AVFilterLink *outlink = inlink->dst->outputs[0];
outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
outlink->w, outlink->h);
outlink->out_buf->pts = picref->pts;
if (picref->video->pixel_aspect.num == 0) {
outlink->out_buf->video->pixel_aspect = picref->video->pixel_aspect;
} else {
outlink->out_buf->video->pixel_aspect.num = picref->video->pixel_aspect.den;
outlink->out_buf->video->pixel_aspect.den = picref->video->pixel_aspect.num;
}
ff_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
}
static void end_frame(AVFilterLink *inlink)
{
TransContext *trans = inlink->dst->priv;
AVFilterBufferRef *inpic = inlink->cur_buf;
AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf;
AVFilterLink *outlink = inlink->dst->outputs[0];
int plane;
for (plane = 0; outpic->data[plane]; plane++) {
int hsub = plane == 1 || plane == 2 ? trans->hsub : 0;
int vsub = plane == 1 || plane == 2 ? trans->vsub : 0;
int pixstep = trans->pixsteps[plane];
int inh = inpic->video->h>>vsub;
int outw = outpic->video->w>>hsub;
int outh = outpic->video->h>>vsub;
uint8_t *out, *in;
int outlinesize, inlinesize;
int x, y;
out = outpic->data[plane]; outlinesize = outpic->linesize[plane];
in = inpic ->data[plane]; inlinesize = inpic ->linesize[plane];
if (trans->dir&1) {
in += inpic->linesize[plane] * (inh-1);
inlinesize *= -1;
}
if (trans->dir&2) {
out += outpic->linesize[plane] * (outh-1);
outlinesize *= -1;
}
for (y = 0; y < outh; y++) {
switch (pixstep) {
case 1:
for (x = 0; x < outw; x++)
out[x] = in[x*inlinesize + y];
break;
case 2:
for (x = 0; x < outw; x++)
*((uint16_t *)(out + 2*x)) = *((uint16_t *)(in + x*inlinesize + y*2));
break;
case 3:
for (x = 0; x < outw; x++) {
int32_t v = AV_RB24(in + x*inlinesize + y*3);
AV_WB24(out + 3*x, v);
}
break;
case 4:
for (x = 0; x < outw; x++)
*((uint32_t *)(out + 4*x)) = *((uint32_t *)(in + x*inlinesize + y*4));
break;
}
out += outlinesize;
}
}
avfilter_unref_buffer(inpic);
ff_draw_slice(outlink, 0, outpic->video->h, 1);
ff_end_frame(outlink);
avfilter_unref_buffer(outpic);
}
AVFilter avfilter_vf_transpose = {
.name = "transpose",
.description = NULL_IF_CONFIG_SMALL("Transpose input video."),
.init = init,
.priv_size = sizeof(TransContext),
.query_formats = query_formats,
.inputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.start_frame = start_frame,
.end_frame = end_frame,
.min_perms = AV_PERM_READ, },
{ .name = NULL}},
.outputs = (AVFilterPad[]) {{ .name = "default",
.config_props = config_props_output,
.type = AVMEDIA_TYPE_VIDEO, },
{ .name = NULL}},
};
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