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/*
* Copyright (c) 2010 Stefano Sabatini
* Copyright (c) 2008 Vitor Sessak
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; 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"
typedef enum {
TRANSPOSE_PT_TYPE_NONE,
TRANSPOSE_PT_TYPE_LANDSCAPE,
TRANSPOSE_PT_TYPE_PORTRAIT,
} PassthroughType;
enum TransposeDir {
TRANSPOSE_CCLOCK_FLIP,
TRANSPOSE_CLOCK,
TRANSPOSE_CCLOCK,
TRANSPOSE_CLOCK_FLIP,
};
typedef struct TransContext {
const AVClass *class;
int hsub, vsub;
int pixsteps[4];
PassthroughType passthrough; ///< landscape passthrough mode enabled
enum TransposeDir dir;
} TransContext;
static int query_formats(AVFilterContext *ctx)
{
AVFilterFormats *pix_fmts = NULL;
int fmt;
for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
if (!(desc->flags & AV_PIX_FMT_FLAG_PAL ||
desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
desc->flags & AV_PIX_FMT_FLAG_BITSTREAM ||
desc->log2_chroma_w != desc->log2_chroma_h))
ff_add_format(&pix_fmts, fmt);
}
ff_set_common_formats(ctx, 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);
if (trans->dir&4) {
av_log(ctx, AV_LOG_WARNING,
"dir values greater than 3 are deprecated, use the passthrough option instead\n");
trans->dir &= 3;
trans->passthrough = TRANSPOSE_PT_TYPE_LANDSCAPE;
}
if ((inlink->w >= inlink->h && trans->passthrough == TRANSPOSE_PT_TYPE_LANDSCAPE) ||
(inlink->w <= inlink->h && trans->passthrough == TRANSPOSE_PT_TYPE_PORTRAIT)) {
av_log(ctx, AV_LOG_VERBOSE,
"w:%d h:%d -> w:%d h:%d (passthrough mode)\n",
inlink->w, inlink->h, inlink->w, inlink->h);
return 0;
} else {
trans->passthrough = TRANSPOSE_PT_TYPE_NONE;
}
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 AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
{
TransContext *trans = inlink->dst->priv;
return trans->passthrough ?
ff_null_get_video_buffer (inlink, w, h) :
ff_default_get_video_buffer(inlink, w, h);
}
typedef struct ThreadData {
AVFrame *in, *out;
} ThreadData;
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr,
int nb_jobs)
{
TransContext *trans = ctx->priv;
ThreadData *td = arg;
AVFrame *out = td->out;
AVFrame *in = td->in;
int plane;
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 = FF_CEIL_RSHIFT(out->width, hsub);
int outh = FF_CEIL_RSHIFT(out->height, vsub);
int start = (outh * jobnr ) / nb_jobs;
int end = (outh * (jobnr+1)) / nb_jobs;
uint8_t *dst, *src;
int dstlinesize, srclinesize;
int x, y;
dstlinesize = out->linesize[plane];
dst = out->data[plane] + start * dstlinesize;
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->data[plane] + dstlinesize * (outh - start - 1);
dstlinesize *= -1;
}
switch (pixstep) {
case 1:
for (y = start; y < end; y++, dst += dstlinesize)
for (x = 0; x < outw; x++)
dst[x] = src[x * srclinesize + y];
break;
case 2:
for (y = start; y < end; y++, dst += dstlinesize) {
for (x = 0; x < outw; x++)
*((uint16_t *)(dst + 2 * x)) =
*((uint16_t *)(src + x * srclinesize + y * 2));
}
break;
case 3:
for (y = start; y < end; y++, dst += dstlinesize) {
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 (y = start; y < end; y++, dst += dstlinesize) {
for (x = 0; x < outw; x++)
*((uint32_t *)(dst + 4 * x)) =
*((uint32_t *)(src + x * srclinesize + y * 4));
}
break;
case 6:
for (y = start; y < end; y++, dst += dstlinesize) {
for (x = 0; x < outw; x++) {
int64_t v = AV_RB48(src + x * srclinesize + y*6);
AV_WB48(dst + 6*x, v);
}
}
break;
case 8:
for (y = start; y < end; y++, dst += dstlinesize) {
for (x = 0; x < outw; x++)
*((uint64_t *)(dst + 8*x)) = *((uint64_t *)(src + x * srclinesize + y*8));
}
break;
}
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
TransContext *trans = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
ThreadData td;
AVFrame *out;
if (trans->passthrough)
return ff_filter_frame(outlink, in);
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, in);
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;
}
td.in = in, td.out = out;
ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outlink->h, ctx->graph->nb_threads));
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
#define OFFSET(x) offsetof(TransContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption transpose_options[] = {
{ "dir", "set transpose direction", OFFSET(dir), AV_OPT_TYPE_INT, { .i64 = TRANSPOSE_CCLOCK_FLIP }, 0, 7, FLAGS, "dir" },
{ "cclock_flip", "rotate counter-clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK_FLIP }, .unit = "dir" },
{ "clock", "rotate clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK }, .unit = "dir" },
{ "cclock", "rotate counter-clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK }, .unit = "dir" },
{ "clock_flip", "rotate clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK_FLIP }, .unit = "dir" },
{ "passthrough", "do not apply transposition if the input matches the specified geometry",
OFFSET(passthrough), AV_OPT_TYPE_INT, {.i64=TRANSPOSE_PT_TYPE_NONE}, 0, INT_MAX, FLAGS, "passthrough" },
{ "none", "always apply transposition", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_NONE}, INT_MIN, INT_MAX, FLAGS, "passthrough" },
{ "portrait", "preserve portrait geometry", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_PORTRAIT}, INT_MIN, INT_MAX, FLAGS, "passthrough" },
{ "landscape", "preserve landscape geometry", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_LANDSCAPE}, INT_MIN, INT_MAX, FLAGS, "passthrough" },
{ NULL }
};
AVFILTER_DEFINE_CLASS(transpose);
static const AVFilterPad avfilter_vf_transpose_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.get_video_buffer = get_video_buffer,
.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,
.flags = AVFILTER_FLAG_SLICE_THREADS,
};
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