FFmpeg/libavfilter/vf_transpose.c
2014-04-19 16:20:57 +02:00

241 lines
7.9 KiB
C

/*
* 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 <stdio.h>
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
enum TransposeDir {
TRANSPOSE_CCLOCK_FLIP,
TRANSPOSE_CLOCK,
TRANSPOSE_CCLOCK,
TRANSPOSE_CLOCK_FLIP,
};
typedef struct TransContext {
const AVClass *class;
int hsub, vsub;
int pixsteps[4];
enum TransposeDir dir;
} TransContext;
static int query_formats(AVFilterContext *ctx)
{
enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
AV_PIX_FMT_RGB565BE, AV_PIX_FMT_RGB565LE,
AV_PIX_FMT_RGB555BE, AV_PIX_FMT_RGB555LE,
AV_PIX_FMT_BGR565BE, AV_PIX_FMT_BGR565LE,
AV_PIX_FMT_BGR555BE, AV_PIX_FMT_BGR555LE,
AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_GRAY16LE,
AV_PIX_FMT_YUV420P16LE, AV_PIX_FMT_YUV420P16BE,
AV_PIX_FMT_YUV422P16LE, AV_PIX_FMT_YUV422P16BE,
AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUV444P16BE,
AV_PIX_FMT_NV12, AV_PIX_FMT_NV21,
AV_PIX_FMT_RGB8, AV_PIX_FMT_BGR8,
AV_PIX_FMT_RGB4_BYTE, AV_PIX_FMT_BGR4_BYTE,
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_GRAY8,
AV_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 *desc_out = av_pix_fmt_desc_get(outlink->format);
const AVPixFmtDescriptor *desc_in = av_pix_fmt_desc_get(inlink->format);
trans->hsub = desc_in->log2_chroma_w;
trans->vsub = desc_in->log2_chroma_h;
av_image_fill_max_pixsteps(trans->pixsteps, NULL, desc_out);
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_VERBOSE,
"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 int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterLink *outlink = inlink->dst->outputs[0];
TransContext *trans = inlink->dst->priv;
AVFrame *out;
int plane;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
out->pts = in->pts;
if (in->sample_aspect_ratio.num == 0) {
out->sample_aspect_ratio = in->sample_aspect_ratio;
} else {
out->sample_aspect_ratio.num = in->sample_aspect_ratio.den;
out->sample_aspect_ratio.den = in->sample_aspect_ratio.num;
}
for (plane = 0; out->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 = in->height >> vsub;
int outw = out->width >> hsub;
int outh = out->height >> vsub;
uint8_t *dst, *src;
int dstlinesize, srclinesize;
int x, y;
dst = out->data[plane];
dstlinesize = out->linesize[plane];
src = in->data[plane];
srclinesize = in->linesize[plane];
if (trans->dir & 1) {
src += in->linesize[plane] * (inh - 1);
srclinesize *= -1;
}
if (trans->dir & 2) {
dst += out->linesize[plane] * (outh - 1);
dstlinesize *= -1;
}
for (y = 0; y < outh; y++) {
switch (pixstep) {
case 1:
for (x = 0; x < outw; x++)
dst[x] = src[x * srclinesize + y];
break;
case 2:
for (x = 0; x < outw; x++)
*((uint16_t *)(dst + 2 * x)) =
*((uint16_t *)(src + x * srclinesize + y * 2));
break;
case 3:
for (x = 0; x < outw; x++) {
int32_t v = AV_RB24(src + x * srclinesize + y * 3);
AV_WB24(dst + 3 * x, v);
}
break;
case 4:
for (x = 0; x < outw; x++)
*((uint32_t *)(dst + 4 * x)) =
*((uint32_t *)(src + x * srclinesize + y * 4));
break;
}
dst += dstlinesize;
}
}
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
#define OFFSET(x) offsetof(TransContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
static const AVOption options[] = {
{ "dir", "Transpose direction", OFFSET(dir), AV_OPT_TYPE_INT, { .i64 = TRANSPOSE_CCLOCK_FLIP },
TRANSPOSE_CCLOCK_FLIP, TRANSPOSE_CLOCK_FLIP, FLAGS, "dir" },
{ "cclock_flip", "counter-clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK_FLIP }, .unit = "dir" },
{ "clock", "clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK }, .unit = "dir" },
{ "cclock", "counter-clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK }, .unit = "dir" },
{ "clock_flip", "clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK_FLIP }, .unit = "dir" },
{ NULL },
};
static const AVClass transpose_class = {
.class_name = "transpose",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
static const AVFilterPad avfilter_vf_transpose_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad avfilter_vf_transpose_outputs[] = {
{
.name = "default",
.config_props = config_props_output,
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter ff_vf_transpose = {
.name = "transpose",
.description = NULL_IF_CONFIG_SMALL("Transpose input video."),
.priv_size = sizeof(TransContext),
.priv_class = &transpose_class,
.query_formats = query_formats,
.inputs = avfilter_vf_transpose_inputs,
.outputs = avfilter_vf_transpose_outputs,
};