From 72ce447ea2bf3c0fbf98a3324b56c1875d3dcb5f Mon Sep 17 00:00:00 2001
From: Roman Arzumanyan <rarzumanyan@nvidia.com>
Date: Wed, 29 Aug 2018 12:53:02 +0300
Subject: [PATCH] Adding NPP transpose filter

---
 libavfilter/Makefile           |   1 +
 libavfilter/allfilters.c       |   1 +
 libavfilter/vf_transpose_npp.c | 515 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 517 insertions(+)
 create mode 100644 libavfilter/vf_transpose_npp.c

diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index e5d3a57af7..b756a3cae8 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -373,6 +373,7 @@ OBJS-$(CONFIG_TONEMAP_FILTER)                += vf_tonemap.o colorspace.o
 OBJS-$(CONFIG_TONEMAP_OPENCL_FILTER)         += vf_tonemap_opencl.o colorspace.o opencl.o \
                                                 opencl/tonemap.o opencl/colorspace_common.o
 OBJS-$(CONFIG_TRANSPOSE_FILTER)              += vf_transpose.o
+OBJS-$(CONFIG_TRANSPOSE_NPP_FILTER)          += vf_transpose_npp.o
 OBJS-$(CONFIG_TRIM_FILTER)                   += trim.o
 OBJS-$(CONFIG_UNPREMULTIPLY_FILTER)          += vf_premultiply.o framesync.o
 OBJS-$(CONFIG_UNSHARP_FILTER)                += vf_unsharp.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 9732ae5345..260038e030 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -355,6 +355,7 @@ extern AVFilter ff_vf_tmix;
 extern AVFilter ff_vf_tonemap;
 extern AVFilter ff_vf_tonemap_opencl;
 extern AVFilter ff_vf_transpose;
+extern AVFilter ff_vf_transpose_npp;
 extern AVFilter ff_vf_trim;
 extern AVFilter ff_vf_unpremultiply;
 extern AVFilter ff_vf_unsharp;
diff --git a/libavfilter/vf_transpose_npp.c b/libavfilter/vf_transpose_npp.c
new file mode 100644
index 0000000000..355991e5eb
--- /dev/null
+++ b/libavfilter/vf_transpose_npp.c
@@ -0,0 +1,515 @@
+/*
+ * 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
+ * transpose npp video filter
+ */
+#include <nppi.h>
+#include <stdio.h>
+#include <string.h>
+#include "libavutil/avstring.h"
+#include "libavutil/common.h"
+#include "libavutil/eval.h"
+#include "libavutil/hwcontext.h"
+#include "libavutil/hwcontext_cuda_internal.h"
+#include "libavutil/internal.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+static const enum AVPixelFormat supported_formats[] = {
+    AV_PIX_FMT_YUV420P,
+    AV_PIX_FMT_NV12,
+    AV_PIX_FMT_YUV444P,
+};
+
+static const enum AVPixelFormat deinterleaved_formats[][2] = {
+    { AV_PIX_FMT_NV12, AV_PIX_FMT_YUV420P },
+};
+
+enum TransposeStage {
+    STAGE_DEINTERLEAVE,
+    STAGE_TRANSPOSE,
+    STAGE_INTERLEAVE,
+    STAGE_NB,
+};
+
+enum Transpose {
+    NPP_TRANSPOSE_NONE,
+    NPP_TRANSPOSE_CW_90,
+    NPP_TRANSPOSE_CW_180,
+    NPP_TRANSPOSE_CW_270,
+    NPP_TRANSPOSE_INVALID,
+};
+
+typedef struct NPPTransposeStageContext {
+    int stage_needed;
+    enum AVPixelFormat in_fmt;
+    enum AVPixelFormat out_fmt;
+    struct {
+        int width;
+        int height;      
+    } planes_in[3], planes_out[3];
+    AVBufferRef *frames_ctx;
+    AVFrame     *frame;
+} NPPTransposeStageContext;
+
+typedef struct NPPTransposeContext {
+    const AVClass *class;
+    NPPTransposeStageContext stages[STAGE_NB];
+    AVFrame *tmp_frame;
+    int passthrough;
+    int shift_width, shift_height;
+    /**
+     * Transpose. Values are:
+     * 0 = original orientation
+     * 1 = Rotate clockwise 90
+     * 2 = Rotate clockwise 180
+     * 3 = Rotate clockwise 270
+     */
+    int t;
+    /**
+     * Output sw format. AV_PIX_FMT_NONE for no conversion.
+     */
+    enum AVPixelFormat format;
+    char *t_expr;               ///< transpose expression string
+    char *format_str;
+    int interp_algo;
+} NPPTransposeContext;
+
+static int npptranspose_init(AVFilterContext *ctx)
+{
+    NPPTransposeContext *s = ctx->priv;
+    int i;
+    if (!strcmp(s->format_str, "same")) {
+        s->format = AV_PIX_FMT_NONE;
+    } else {
+        s->format = av_get_pix_fmt(s->format_str);
+        if (s->format == AV_PIX_FMT_NONE) {
+            av_log(ctx, AV_LOG_ERROR, "Unrecognized pixel format: %s\n", s->format_str);
+            return AVERROR(EINVAL);
+        }
+    }
+    for (i = 0; i < FF_ARRAY_ELEMS(s->stages); i++) {
+        s->stages[i].frame = av_frame_alloc();
+        if (!s->stages[i].frame)
+            return AVERROR(ENOMEM);
+    }
+    s->tmp_frame = av_frame_alloc();
+    if (!s->tmp_frame)
+        return AVERROR(ENOMEM);
+    return 0;
+}
+
+static void npptranspose_uninit(AVFilterContext *ctx)
+{
+    NPPTransposeContext *s = ctx->priv;
+    int i;
+    for (i = 0; i < FF_ARRAY_ELEMS(s->stages); i++) {
+        av_frame_free(&s->stages[i].frame);
+        av_buffer_unref(&s->stages[i].frames_ctx);
+    }
+    av_frame_free(&s->tmp_frame);
+}
+
+static int npptranspose_query_formats(AVFilterContext *ctx)
+{
+    static const enum AVPixelFormat pixel_formats[] = {
+        AV_PIX_FMT_CUDA, AV_PIX_FMT_NONE,
+    };
+    AVFilterFormats *pix_fmts = ff_make_format_list(pixel_formats);
+    return ff_set_common_formats(ctx, pix_fmts);
+}
+
+static int init_stage(NPPTransposeStageContext *stage, AVBufferRef *device_ctx)
+{
+    AVBufferRef *out_ref = NULL;
+    AVHWFramesContext *out_ctx;
+    int in_sw, in_sh, out_sw, out_sh;
+    int ret, i;
+    av_pix_fmt_get_chroma_sub_sample(stage->in_fmt,  &in_sw,  &in_sh);
+    av_pix_fmt_get_chroma_sub_sample(stage->out_fmt, &out_sw, &out_sh);
+    if (!stage->planes_out[0].width) {
+        stage->planes_out[0].width  = stage->planes_in[0].width;
+        stage->planes_out[0].height = stage->planes_in[0].height;
+    }
+    for (i = 1; i < FF_ARRAY_ELEMS(stage->planes_in); i++) {
+        stage->planes_in[i].width   = stage->planes_in[0].width   >> in_sw;
+        stage->planes_in[i].height  = stage->planes_in[0].height  >> in_sh;
+        stage->planes_out[i].width  = stage->planes_out[0].width  >> out_sw;
+        stage->planes_out[i].height = stage->planes_out[0].height >> out_sh;
+    }
+    out_ref = av_hwframe_ctx_alloc(device_ctx);
+    if (!out_ref)
+        return AVERROR(ENOMEM);
+    out_ctx = (AVHWFramesContext*)out_ref->data;
+    out_ctx->format    = AV_PIX_FMT_CUDA;
+    out_ctx->sw_format = stage->out_fmt;
+    out_ctx->width     = FFALIGN(stage->planes_out[0].width,  32);
+    out_ctx->height    = FFALIGN(stage->planes_out[0].height, 32);
+    ret = av_hwframe_ctx_init(out_ref);
+    if (ret < 0)
+        goto fail;
+    av_frame_unref(stage->frame);
+    ret = av_hwframe_get_buffer(out_ref, stage->frame, 0);
+    if (ret < 0)
+        goto fail;
+    stage->frame->width  = stage->planes_out[0].width;
+    stage->frame->height = stage->planes_out[0].height;
+    av_buffer_unref(&stage->frames_ctx);
+    stage->frames_ctx = out_ref;
+    return 0;
+fail:
+    av_buffer_unref(&out_ref);
+    return ret;
+}
+
+static int format_is_supported(enum AVPixelFormat fmt)
+{
+    int i;
+    for (i = 0; i < FF_ARRAY_ELEMS(supported_formats); i++)
+        if (supported_formats[i] == fmt)
+            return 1;
+    return 0;
+}
+
+static enum AVPixelFormat get_deinterleaved_format(enum AVPixelFormat fmt)
+{
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
+    int i, planes;
+    planes = av_pix_fmt_count_planes(fmt);
+    if (planes == desc->nb_components)
+        return fmt;
+    for (i = 0; i < FF_ARRAY_ELEMS(deinterleaved_formats); i++)
+        if (deinterleaved_formats[i][0] == fmt)
+            return deinterleaved_formats[i][1];
+    return AV_PIX_FMT_NONE;
+}
+
+static int init_processing_chain(AVFilterContext *ctx, int in_width, int in_height,
+                                 int out_width, int out_height)
+{
+    NPPTransposeContext *s = ctx->priv;
+    AVHWFramesContext *in_frames_ctx;
+    enum AVPixelFormat in_format;
+    enum AVPixelFormat out_format;
+    enum AVPixelFormat in_deinterleaved_format;
+    enum AVPixelFormat out_deinterleaved_format;
+    int i, ret, last_stage = -1;
+    /* check that we have a hw context */
+    if (!ctx->inputs[0]->hw_frames_ctx) {
+        av_log(ctx, AV_LOG_ERROR, "No hw context provided on input\n");
+        return AVERROR(EINVAL);
+    }
+    in_frames_ctx = (AVHWFramesContext*)ctx->inputs[0]->hw_frames_ctx->data;
+    in_format     = in_frames_ctx->sw_format;
+    out_format    = (s->format == AV_PIX_FMT_NONE) ? in_format : s->format;
+    if (!format_is_supported(in_format)) {
+        av_log(ctx, AV_LOG_ERROR, "Unsupported input format: %s\n",
+               av_get_pix_fmt_name(in_format));
+        return AVERROR(ENOSYS);
+    }
+    if (!format_is_supported(out_format)) {
+        av_log(ctx, AV_LOG_ERROR, "Unsupported output format: %s\n",
+               av_get_pix_fmt_name(out_format));
+        return AVERROR(ENOSYS);
+    }
+    in_deinterleaved_format  = get_deinterleaved_format(in_format);
+    out_deinterleaved_format = get_deinterleaved_format(out_format);
+    if (in_deinterleaved_format  == AV_PIX_FMT_NONE ||
+        out_deinterleaved_format == AV_PIX_FMT_NONE)
+        return AVERROR_BUG;
+    if ((s->t > NPP_TRANSPOSE_NONE) && (s->t < NPP_TRANSPOSE_INVALID)) {
+        s->stages[STAGE_TRANSPOSE].stage_needed = 1;  
+    }  
+    if (in_format == out_format && !s->stages[STAGE_TRANSPOSE].stage_needed)
+        s->passthrough = 1;
+    if (!s->passthrough) {
+        if (in_format != in_deinterleaved_format)
+            s->stages[STAGE_DEINTERLEAVE].stage_needed = 1;
+        if (out_format != out_deinterleaved_format)
+            s->stages[STAGE_INTERLEAVE].stage_needed = 1;
+    }
+    s->stages[STAGE_DEINTERLEAVE].in_fmt              = in_format;
+    s->stages[STAGE_DEINTERLEAVE].out_fmt             = in_deinterleaved_format;
+    s->stages[STAGE_DEINTERLEAVE].planes_in[0].width  = in_width;
+    s->stages[STAGE_DEINTERLEAVE].planes_in[0].height = in_height;
+    s->stages[STAGE_TRANSPOSE].in_fmt               = in_deinterleaved_format;
+    s->stages[STAGE_TRANSPOSE].out_fmt              = out_deinterleaved_format;
+    s->stages[STAGE_TRANSPOSE].planes_in[0].width   = in_width;
+    s->stages[STAGE_TRANSPOSE].planes_in[0].height  = in_height;
+    s->stages[STAGE_TRANSPOSE].planes_out[0].width  = out_width;
+    s->stages[STAGE_TRANSPOSE].planes_out[0].height = out_height;   
+    s->stages[STAGE_INTERLEAVE].in_fmt              = out_deinterleaved_format;
+    s->stages[STAGE_INTERLEAVE].out_fmt             = out_format;
+    s->stages[STAGE_INTERLEAVE].planes_in[0].width  = out_width;
+    s->stages[STAGE_INTERLEAVE].planes_in[0].height = out_height;
+    /* init the hardware contexts */
+    for (i = 0; i < FF_ARRAY_ELEMS(s->stages); i++) {
+        if (!s->stages[i].stage_needed)
+            continue;
+        ret = init_stage(&s->stages[i], in_frames_ctx->device_ref);
+        if (ret < 0)
+            return ret;
+        last_stage = i;
+    }
+    if (last_stage >= 0)
+        ctx->outputs[0]->hw_frames_ctx = av_buffer_ref(s->stages[last_stage].frames_ctx);
+    else
+        ctx->outputs[0]->hw_frames_ctx = av_buffer_ref(ctx->inputs[0]->hw_frames_ctx);
+    if (!ctx->outputs[0]->hw_frames_ctx)
+        return AVERROR(ENOMEM);
+    return 0;
+}
+
+static int npptranspose_config_props(AVFilterLink *outlink)
+{
+    AVFilterContext *ctx = outlink->src;
+    AVFilterLink *inlink = outlink->src->inputs[0];
+    NPPTransposeContext *s = ctx->priv;
+    int ret;
+    const char *expr;
+    double res;
+    av_expr_parse_and_eval(&res, (expr = s->t_expr),
+                           NULL, NULL,
+                           NULL, NULL, NULL, NULL, NULL, 0, ctx);
+    s->t = (int) res;   
+    if (s->t < NPP_TRANSPOSE_NONE || s->t >= NPP_TRANSPOSE_INVALID)
+    {
+        av_log(ctx, AV_LOG_ERROR, "Invalid value for transpose: %d.\n",s->t);
+        goto fail;
+    }                               
+    // Swap width and height for 90 or 270 deg rotation
+    outlink->w = s->t % 2 ? inlink->h : inlink->w;
+    outlink->h = s->t % 2 ? inlink->w : inlink->h;
+    ret = init_processing_chain(ctx, inlink->w, inlink->h, outlink->w, outlink->h);
+    if (ret < 0)
+        return ret;
+    av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d -transpose-> w:%d h:%d\n",
+           inlink->w, inlink->h, outlink->w, outlink->h);
+    // invert aspect ratio for 90 or 270 deg rotation
+    if ( s->t % 2 )
+        outlink->sample_aspect_ratio = (AVRational){outlink->sample_aspect_ratio.den, outlink->sample_aspect_ratio.num};
+    
+    return 0;
+fail:
+    return ret;
+}
+
+static int npptranspose_deinterleave(AVFilterContext *ctx, NPPTransposeStageContext *stage,
+                                 AVFrame *out, AVFrame *in)
+{
+    AVHWFramesContext *in_frames_ctx = (AVHWFramesContext*)in->hw_frames_ctx->data;
+    NppStatus err;
+    switch (in_frames_ctx->sw_format) {
+    case AV_PIX_FMT_NV12:
+        err = nppiYCbCr420_8u_P2P3R(in->data[0], in->linesize[0],
+                                    in->data[1], in->linesize[1],
+                                    out->data, out->linesize,
+                                    (NppiSize){ in->width, in->height });
+        break;
+    default:
+        return AVERROR_BUG;
+    }
+    if (err != NPP_SUCCESS) {
+        av_log(ctx, AV_LOG_ERROR, "NPP deinterleave error: %d\n", err);
+        return AVERROR_UNKNOWN;
+    }
+    return 0;
+}
+
+static int npptranspose_rotate(AVFilterContext *ctx, NPPTransposeStageContext *stage,
+                           AVFrame *out, AVFrame *in)
+{
+    NPPTransposeContext *s = ctx->priv;
+    NppStatus err;
+    int i;
+    for (i = 0; i < FF_ARRAY_ELEMS(stage->planes_in) && i < FF_ARRAY_ELEMS(in->data) && in->data[i]; i++) {
+        int iw = stage->planes_in[i].width;
+        int ih = stage->planes_in[i].height;
+        int ow = stage->planes_out[i].width;
+        int oh = stage->planes_out[i].height;
+        // nppRotate uses 0,0 as the rotation point
+        // need to shift the image accordingly after rotation
+        // need to substract 1 to get the correct coordinates
+        int shiftw = (s->t==NPP_TRANSPOSE_CW_90  || s->t==NPP_TRANSPOSE_CW_180) ? ow-1 : 0;
+        int shifth = (s->t==NPP_TRANSPOSE_CW_180 || s->t==NPP_TRANSPOSE_CW_270) ? oh-1 : 0;
+        err = nppiRotate_8u_C1R(in->data[i], (NppiSize){ iw, ih },
+                                in->linesize[i], (NppiRect){0,0,iw,ih},
+                                out->data[i], out->linesize[i],
+                                (NppiRect){ 0, 0, ow, oh },
+                                s->t*-90.0, shiftw, shifth, s->interp_algo);        
+                                                
+        if (err != NPP_SUCCESS) {
+            av_log(ctx, AV_LOG_ERROR, "NPP rotate error: %d\n", err);
+            return AVERROR_UNKNOWN;
+        }
+    }
+    return 0;
+}
+
+static int npptranspose_interleave(AVFilterContext *ctx, NPPTransposeStageContext *stage,
+                               AVFrame *out, AVFrame *in)
+{
+    AVHWFramesContext *out_frames_ctx = (AVHWFramesContext*)out->hw_frames_ctx->data;
+    NppStatus err;
+    switch (out_frames_ctx->sw_format) {
+    case AV_PIX_FMT_NV12:
+        err = nppiYCbCr420_8u_P3P2R((const uint8_t**)in->data,
+                                    in->linesize,
+                                    out->data[0], out->linesize[0],
+                                    out->data[1], out->linesize[1],
+                                    (NppiSize){ in->width, in->height });
+        break;
+    default:
+        return AVERROR_BUG;
+    }
+    if (err != NPP_SUCCESS) {
+        av_log(ctx, AV_LOG_ERROR, "NPP deinterleave error: %d\n", err);
+        return AVERROR_UNKNOWN;
+    }
+    return 0;
+}
+
+static int (*const npptranspose_process[])(AVFilterContext *ctx, NPPTransposeStageContext *stage,
+                                       AVFrame *out, AVFrame *in) = {
+    [STAGE_DEINTERLEAVE] = npptranspose_deinterleave,
+    [STAGE_TRANSPOSE]       = npptranspose_rotate,
+    [STAGE_INTERLEAVE]   = npptranspose_interleave,
+};
+
+static int npptranspose_transpose(AVFilterContext *ctx, AVFrame *out, AVFrame *in)
+{
+    NPPTransposeContext *s = ctx->priv;
+    AVFrame *src = in;
+    int i, ret, last_stage = -1;
+    for (i = 0; i < FF_ARRAY_ELEMS(s->stages); i++) {
+        if (!s->stages[i].stage_needed)
+            continue;
+        ret = npptranspose_process[i](ctx, &s->stages[i], s->stages[i].frame, src);
+        if (ret < 0)
+            return ret;
+        src        = s->stages[i].frame;
+        last_stage = i;
+    }
+    if (last_stage < 0)
+        return AVERROR_BUG;
+    ret = av_hwframe_get_buffer(src->hw_frames_ctx, s->tmp_frame, 0);
+    if (ret < 0)
+        return ret;
+    av_frame_move_ref(out, src);
+    av_frame_move_ref(src, s->tmp_frame);
+    ret = av_frame_copy_props(out, in);
+    if (ret < 0)
+        return ret;
+    return 0;
+}
+
+static int npptranspose_filter_frame(AVFilterLink *link, AVFrame *in)
+{
+    AVFilterContext              *ctx = link->dst;
+    NPPTransposeContext                *s = ctx->priv;
+    AVFilterLink             *outlink = ctx->outputs[0];
+    AVHWFramesContext     *frames_ctx = (AVHWFramesContext*)outlink->hw_frames_ctx->data;
+    AVCUDADeviceContext *device_hwctx = frames_ctx->device_ctx->hwctx;
+    AVFrame *out = NULL;
+    CUresult err;
+    CUcontext dummy;
+    int ret = 0;
+    if (s->passthrough)
+        return ff_filter_frame(outlink, in);
+    out = av_frame_alloc();
+    if (!out) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+    err = device_hwctx->internal->cuda_dl->cuCtxPushCurrent(device_hwctx->cuda_ctx);
+    if (err != CUDA_SUCCESS) {
+        ret = AVERROR_UNKNOWN;
+        goto fail;
+    }
+    ret = npptranspose_transpose(ctx, out, in);
+    device_hwctx->internal->cuda_dl->cuCtxPopCurrent(&dummy);
+    if (ret < 0)
+        goto fail;
+    av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
+              (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
+              (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
+              INT_MAX);
+    av_frame_free(&in);
+    return ff_filter_frame(outlink, out);
+fail:
+    av_frame_free(&in);
+    av_frame_free(&out);
+    return ret;
+}
+
+#define OFFSET(x) offsetof(NPPTransposeContext, x)
+#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM)
+
+static const AVOption options[] = {
+    { "t",              "Output video transpose",                       OFFSET(t_expr),      AV_OPT_TYPE_STRING, { .str = "it"   }, .flags = FLAGS },
+    { "format",         "Output pixel format",                          OFFSET(format_str),  AV_OPT_TYPE_STRING, { .str = "same" }, .flags = FLAGS },
+    { "interp_algo",    "Interpolation algorithm used for transposing", OFFSET(interp_algo), AV_OPT_TYPE_INT,    { .i64 = NPPI_INTER_CUBIC }, 0, INT_MAX, FLAGS, "interp_algo" },
+    { "nn",             "nearest neighbour",                            0,                   AV_OPT_TYPE_CONST,  { .i64 = NPPI_INTER_NN    }, 0, 0,       FLAGS, "interp_algo" },
+    { "linear",         "linear",                                       0,                   AV_OPT_TYPE_CONST,  { .i64 = NPPI_INTER_LINEAR}, 0, 0,       FLAGS, "interp_algo" },
+    { "cubic",          "cubic",                                        0,                   AV_OPT_TYPE_CONST,  { .i64 = NPPI_INTER_CUBIC }, 0, 0,       FLAGS, "interp_algo" },
+    { NULL },
+};
+
+static const AVClass npptranspose_class = {
+    .class_name = "npptranspose",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVFilterPad npptranspose_inputs[] = {
+    {
+        .name        = "default",
+        .type        = AVMEDIA_TYPE_VIDEO,
+        .filter_frame = npptranspose_filter_frame,
+    },
+    { NULL }
+};
+
+static const AVFilterPad npptranspose_outputs[] = {
+    {
+        .name         = "default",
+        .type         = AVMEDIA_TYPE_VIDEO,
+        .config_props = npptranspose_config_props,
+    },
+    { NULL }
+};
+
+AVFilter ff_vf_transpose_npp = {
+    .name      = "transpose_npp",
+    .description = NULL_IF_CONFIG_SMALL("NVIDIA Performance Primitives video "
+                                        "transpose and format conversion"),
+    .init          = npptranspose_init,
+    .uninit        = npptranspose_uninit,
+    .query_formats = npptranspose_query_formats,
+    .priv_size = sizeof(NPPTransposeContext),
+    .priv_class = &npptranspose_class,
+    .inputs    = npptranspose_inputs,
+    .outputs   = npptranspose_outputs,
+    .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
+};
\ No newline at end of file
-- 
2.15.1.windows.2

