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/*
* Copyright (c) 2023 Zhao Zhili <zhilizhao@tencent.com>
*
* 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
*/
#include <VideoToolbox/VideoToolbox.h>
#include "libavutil/hwcontext.h"
#include "libavutil/hwcontext_videotoolbox.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "internal.h"
#include "transpose.h"
typedef struct TransposeVtContext {
AVClass *class;
VTPixelRotationSessionRef session;
int dir;
int passthrough;
} TransposeVtContext;
static av_cold int transpose_vt_init(AVFilterContext *avctx)
{
TransposeVtContext *s = avctx->priv;
int ret;
ret = VTPixelRotationSessionCreate(kCFAllocatorDefault, &s->session);
if (ret != noErr) {
av_log(avctx, AV_LOG_ERROR, "Rotation session create failed, %d\n", ret);
return AVERROR_EXTERNAL;
}
return 0;
}
static av_cold void transpose_vt_uninit(AVFilterContext *avctx)
{
TransposeVtContext *s = avctx->priv;
if (s->session) {
VTPixelRotationSessionInvalidate(s->session);
CFRelease(s->session);
s->session = NULL;
}
}
static int transpose_vt_filter_frame(AVFilterLink *link, AVFrame *in)
{
int ret;
AVFilterContext *ctx = link->dst;
TransposeVtContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
CVPixelBufferRef src;
CVPixelBufferRef dst;
if (s->passthrough)
return ff_filter_frame(outlink, in);
AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
ret = AVERROR(ENOMEM);
goto fail;
}
ret = av_frame_copy_props(out, in);
if (ret < 0)
goto fail;
src = (CVPixelBufferRef)in->data[3];
dst = (CVPixelBufferRef)out->data[3];
ret = VTPixelRotationSessionRotateImage(s->session, src, dst);
if (ret != noErr) {
av_log(ctx, AV_LOG_ERROR, "transfer image failed, %d\n", ret);
ret = AVERROR_EXTERNAL;
goto fail;
}
av_frame_free(&in);
return ff_filter_frame(outlink, out);
fail:
av_frame_free(&in);
av_frame_free(&out);
return ret;
}
static int transpose_vt_config_output(AVFilterLink *outlink)
{
int err;
AVFilterContext *avctx = outlink->src;
TransposeVtContext *s = avctx->priv;
AVFilterLink *inlink = outlink->src->inputs[0];
CFStringRef rotation = kVTRotation_0;
CFBooleanRef vflip = kCFBooleanFalse;
CFBooleanRef hflip = kCFBooleanFalse;
int swap_w_h = 0;
if ((inlink->w >= inlink->h && s->passthrough == TRANSPOSE_PT_TYPE_LANDSCAPE) ||
(inlink->w <= inlink->h && s->passthrough == TRANSPOSE_PT_TYPE_PORTRAIT)) {
av_log(avctx, AV_LOG_VERBOSE,
"w:%d h:%d -> w:%d h:%d (passthrough mode)\n",
inlink->w, inlink->h, inlink->w, inlink->h);
return 0;
}
s->passthrough = TRANSPOSE_PT_TYPE_NONE;
switch (s->dir) {
case TRANSPOSE_CCLOCK_FLIP:
rotation = kVTRotation_CCW90;
vflip = kCFBooleanTrue;
swap_w_h = 1;
break;
case TRANSPOSE_CCLOCK:
rotation = kVTRotation_CCW90;
swap_w_h = 1;
break;
case TRANSPOSE_CLOCK:
rotation = kVTRotation_CW90;
swap_w_h = 1;
break;
case TRANSPOSE_CLOCK_FLIP:
rotation = kVTRotation_CW90;
vflip = kCFBooleanTrue;
swap_w_h = 1;
break;
case TRANSPOSE_REVERSAL:
rotation = kVTRotation_180;
break;
case TRANSPOSE_HFLIP:
hflip = kCFBooleanTrue;
break;
case TRANSPOSE_VFLIP:
vflip = kCFBooleanTrue;
break;
default:
av_log(avctx, AV_LOG_ERROR, "Failed to set direction to %d\n", s->dir);
return AVERROR(EINVAL);
}
err = VTSessionSetProperty(s->session, kVTPixelRotationPropertyKey_Rotation,
rotation);
if (err != noErr) {
av_log(avctx, AV_LOG_ERROR, "Set rotation property failed, %d\n", err);
return AVERROR_EXTERNAL;
}
err = VTSessionSetProperty(s->session, kVTPixelRotationPropertyKey_FlipVerticalOrientation,
vflip);
if (err != noErr) {
av_log(avctx, AV_LOG_ERROR, "Set vertical flip property failed, %d\n", err);
return AVERROR_EXTERNAL;
}
err = VTSessionSetProperty(s->session, kVTPixelRotationPropertyKey_FlipHorizontalOrientation,
hflip);
if (err != noErr) {
av_log(avctx, AV_LOG_ERROR, "Set horizontal flip property failed, %d\n", err);
return AVERROR_EXTERNAL;
}
if (swap_w_h) {
outlink->w = inlink->h;
outlink->h = inlink->w;
}
return 0;
}
#define OFFSET(x) offsetof(TransposeVtContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption transpose_vt_options[] = {
{ "dir", "set transpose direction",
OFFSET(dir), AV_OPT_TYPE_INT, { .i64 = TRANSPOSE_CCLOCK_FLIP }, 0, 6, FLAGS, "dir" },
{ "cclock_flip", "rotate counter-clockwise with vertical flip",
0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK_FLIP }, .flags=FLAGS, .unit = "dir" },
{ "clock", "rotate clockwise",
0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK }, .flags=FLAGS, .unit = "dir" },
{ "cclock", "rotate counter-clockwise",
0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK }, .flags=FLAGS, .unit = "dir" },
{ "clock_flip", "rotate clockwise with vertical flip",
0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK_FLIP }, .flags=FLAGS, .unit = "dir" },
{ "reversal", "rotate by half-turn",
0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_REVERSAL }, .flags=FLAGS, .unit = "dir" },
{ "hflip", "flip horizontally",
0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_HFLIP }, .flags=FLAGS, .unit = "dir" },
{ "vflip", "flip vertically",
0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_VFLIP }, .flags=FLAGS, .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_vt);
static const AVFilterPad transpose_vt_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = &transpose_vt_filter_frame,
},
};
static const AVFilterPad transpose_vt_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = &transpose_vt_config_output,
},
};
const AVFilter ff_vf_transpose_vt = {
.name = "transpose_vt",
.description = NULL_IF_CONFIG_SMALL("Transpose Videotoolbox frames"),
.priv_size = sizeof(TransposeVtContext),
.init = transpose_vt_init,
.uninit = transpose_vt_uninit,
FILTER_INPUTS(transpose_vt_inputs),
FILTER_OUTPUTS(transpose_vt_outputs),
FILTER_SINGLE_PIXFMT(AV_PIX_FMT_VIDEOTOOLBOX),
.priv_class = &transpose_vt_class,
.flags = AVFILTER_FLAG_HWDEVICE,
};
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