avfilter: add nvidia NPP based transpose filter

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

7 files changed, 536 insertions, 3 deletions

diff --git a/Changelog b/Changelog
index 01d974ed0f..a117ad4d2e 100644
--- a/Changelog
+++ b/Changelog
@@ -25,6 +25,7 @@ version <next>:
 - RemotelyAnywhere Screen Capture decoder
 - cue and acue filters
 - support for AV1 in MP4
+- transpose_npp filter
 
 
 version 4.0:
diff --git a/configure b/configure
index 656941202e..ef97c6b500 100755
--- a/configure
+++ b/configure
@@ -2926,6 +2926,7 @@ hwupload_cuda_filter_deps="ffnvcodec"
 scale_npp_filter_deps="ffnvcodec libnpp"
 scale_cuda_filter_deps="cuda_sdk"
 thumbnail_cuda_filter_deps="cuda_sdk"
+transpose_npp_filter_deps="ffnvcodec libnpp"
 
 amf_deps_any="libdl LoadLibrary"
 nvenc_deps="ffnvcodec"
@@ -6087,8 +6088,8 @@ enabled libmodplug        && require_pkg_config libmodplug libmodplug libmodplug
 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame $libm_extralibs
 enabled libmysofa         && { check_pkg_config libmysofa libmysofa mysofa.h mysofa_load ||
                                require libmysofa mysofa.h mysofa_load -lmysofa $zlib_extralibs; }
-enabled libnpp            && { check_lib libnpp npp.h nppGetLibVersion -lnppig -lnppicc -lnppc ||
-                               check_lib libnpp npp.h nppGetLibVersion -lnppi -lnppc ||
+enabled libnpp            && { check_lib libnpp npp.h nppGetLibVersion -lnppig -lnppicc -lnppc -lnppidei ||
+                               check_lib libnpp npp.h nppGetLibVersion -lnppi -lnppc -lnppidei ||
                                die "ERROR: libnpp not found"; }
 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
 enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
diff --git a/doc/filters.texi b/doc/filters.texi
index 5ccd6e0863..860d1eadca 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -16241,6 +16241,7 @@ embedded peak information in display metadata is not reliable or when tone
 mapping from a lower range to a higher range.
 @end table
 
+@anchor{transpose}
 @section transpose
 
 Transpose rows with columns in the input video and optionally flip it.
@@ -16320,6 +16321,47 @@ The command above can also be specified as:
 transpose=1:portrait
 @end example
 
+@section transpose_npp
+
+Transpose rows with columns in the input video and optionally flip it.
+For more in depth examples see the @ref{transpose} video filter, which shares mostly the same options.
+
+It accepts the following parameters:
+
+@table @option
+
+@item dir
+Specify the transposition direction.
+
+Can assume the following values:
+@table @samp
+@item cclock_flip
+Rotate by 90 degrees counterclockwise and vertically flip. (default)
+
+@item clock
+Rotate by 90 degrees clockwise.
+
+@item cclock
+Rotate by 90 degrees counterclockwise.
+
+@item clock_flip
+Rotate by 90 degrees clockwise and vertically flip.
+@end table
+
+@item passthrough
+Do not apply the transposition if the input geometry matches the one
+specified by the specified value. It accepts the following values:
+@table @samp
+@item none
+Always apply transposition. (default)
+@item portrait
+Preserve portrait geometry (when @var{height} >= @var{width}).
+@item landscape
+Preserve landscape geometry (when @var{width} >= @var{height}).
+@end table
+
+@end table
+
 @section trim
 Trim the input so that the output contains one continuous subpart of the input.
 
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 433d03fd5c..5b0462692a 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -376,6 +376,7 @@ 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 712530c8d6..10ac52b711 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -358,6 +358,7 @@ 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/version.h b/libavfilter/version.h
index ef982339d7..30ccef18ea 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -30,7 +30,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVFILTER_VERSION_MAJOR   7
-#define LIBAVFILTER_VERSION_MINOR  28
+#define LIBAVFILTER_VERSION_MINOR  29
 #define LIBAVFILTER_VERSION_MICRO 100
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
diff --git a/libavfilter/vf_transpose_npp.c b/libavfilter/vf_transpose_npp.c
new file mode 100644
index 0000000000..1b3a5c0c69
--- /dev/null
+++ b/libavfilter/vf_transpose_npp.c
@@ -0,0 +1,487 @@
+/*
+ * 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 <nppi.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "libavutil/common.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_YUV444P
+};
+
+enum TransposeStage {
+    STAGE_ROTATE,
+    STAGE_TRANSPOSE,
+    STAGE_NB
+};
+
+enum Transpose {
+    NPP_TRANSPOSE_CCLOCK_FLIP = 0,
+    NPP_TRANSPOSE_CLOCK = 1,
+    NPP_TRANSPOSE_CCLOCK = 2,
+    NPP_TRANSPOSE_CLOCK_FLIP = 3
+};
+
+enum Passthrough {
+    NPP_TRANSPOSE_PT_TYPE_NONE = 0,
+    NPP_TRANSPOSE_PT_TYPE_LANDSCAPE,
+    NPP_TRANSPOSE_PT_TYPE_PORTRAIT
+};
+
+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;    ///< PassthroughType, landscape passthrough mode enabled
+    int dir;            ///< TransposeDir
+} NPPTransposeContext;
+
+static int npptranspose_init(AVFilterContext *ctx)
+{
+    NPPTransposeContext *s = ctx->priv;
+    int i;
+
+    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 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 format;
+    int i, ret, last_stage = -1;
+    int rot_width = out_width, rot_height = out_height;
+
+    /* 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;
+    format        = in_frames_ctx->sw_format;
+
+    if (!format_is_supported(format)) {
+        av_log(ctx, AV_LOG_ERROR, "Unsupported input format: %s\n",
+               av_get_pix_fmt_name(format));
+        return AVERROR(ENOSYS);
+    }
+
+    if (s->dir != NPP_TRANSPOSE_CCLOCK_FLIP) {
+        s->stages[STAGE_ROTATE].stage_needed = 1;
+    }
+
+    if (s->dir == NPP_TRANSPOSE_CCLOCK_FLIP || s->dir == NPP_TRANSPOSE_CLOCK_FLIP) {
+        s->stages[STAGE_TRANSPOSE].stage_needed = 1;
+
+        /* Rotating by 180° in case of clock_flip, or not at all for cclock_flip, so width/height unchanged by rotation */
+        rot_width = in_width;
+        rot_height = in_height;
+    }
+
+    s->stages[STAGE_ROTATE].in_fmt               = format;
+    s->stages[STAGE_ROTATE].out_fmt              = format;
+    s->stages[STAGE_ROTATE].planes_in[0].width   = in_width;
+    s->stages[STAGE_ROTATE].planes_in[0].height  = in_height;
+    s->stages[STAGE_ROTATE].planes_out[0].width  = rot_width;
+    s->stages[STAGE_ROTATE].planes_out[0].height = rot_height;
+    s->stages[STAGE_TRANSPOSE].in_fmt               = format;
+    s->stages[STAGE_TRANSPOSE].out_fmt              = format;
+    s->stages[STAGE_TRANSPOSE].planes_in[0].width   = rot_width;
+    s->stages[STAGE_TRANSPOSE].planes_in[0].height  = rot_height;
+    s->stages[STAGE_TRANSPOSE].planes_out[0].width  = out_width;
+    s->stages[STAGE_TRANSPOSE].planes_out[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);
+        s->passthrough = 1;
+    }
+
+    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   = ctx->inputs[0];
+    NPPTransposeContext *s = ctx->priv;
+    int ret;
+
+    if ((inlink->w >= inlink->h && s->passthrough == NPP_TRANSPOSE_PT_TYPE_LANDSCAPE) ||
+        (inlink->w <= inlink->h && s->passthrough == NPP_TRANSPOSE_PT_TYPE_PORTRAIT))
+    {
+        if (inlink->hw_frames_ctx) {
+            outlink->hw_frames_ctx = av_buffer_ref(inlink->hw_frames_ctx);
+            if (!outlink->hw_frames_ctx)
+                return AVERROR(ENOMEM);
+        }
+
+        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 {
+        s->passthrough = NPP_TRANSPOSE_PT_TYPE_NONE;
+    }
+
+    outlink->w = inlink->h;
+    outlink->h = inlink->w;
+    outlink->sample_aspect_ratio = (AVRational){inlink->sample_aspect_ratio.den, inlink->sample_aspect_ratio.num};
+
+    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);
+
+    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
+        double angle = s->dir == NPP_TRANSPOSE_CLOCK ? -90.0 : s->dir == NPP_TRANSPOSE_CCLOCK ? 90.0 : 180.0;
+        int shiftw = (s->dir == NPP_TRANSPOSE_CLOCK  || s->dir == NPP_TRANSPOSE_CLOCK_FLIP) ? ow - 1 : 0;
+        int shifth = (s->dir == NPP_TRANSPOSE_CCLOCK || s->dir == NPP_TRANSPOSE_CLOCK_FLIP) ? 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 },
+                                angle, shiftw, shifth, NPPI_INTER_NN);
+        if (err != NPP_SUCCESS) {
+            av_log(ctx, AV_LOG_ERROR, "NPP rotate error: %d\n", err);
+            return AVERROR_UNKNOWN;
+        }
+    }
+
+    return 0;
+}
+
+static int npptranspose_transpose(AVFilterContext *ctx, NPPTransposeStageContext *stage,
+                                  AVFrame *out, AVFrame *in)
+{
+    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;
+
+        err = nppiTranspose_8u_C1R(in->data[i], in->linesize[i],
+                                   out->data[i], out->linesize[i],
+                                   (NppiSize){ iw, ih });
+        if (err != NPP_SUCCESS) {
+            av_log(ctx, AV_LOG_ERROR, "NPP transpose error: %d\n", err);
+            return AVERROR_UNKNOWN;
+        }
+    }
+
+    return 0;
+}
+
+static int (*const npptranspose_process[])(AVFilterContext *ctx, NPPTransposeStageContext *stage,
+                                           AVFrame *out, AVFrame *in) = {
+    [STAGE_ROTATE]       = npptranspose_rotate,
+    [STAGE_TRANSPOSE]    = npptranspose_transpose
+};
+
+static int npptranspose_filter(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_filter(ctx, out, in);
+
+    device_hwctx->internal->cuda_dl->cuCtxPopCurrent(&dummy);
+    if (ret < 0)
+        goto fail;
+
+    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[] = {
+    { "dir", "set transpose direction", OFFSET(dir), AV_OPT_TYPE_INT, { .i64 = NPP_TRANSPOSE_CCLOCK_FLIP }, 0, 3, FLAGS, "dir" },
+        { "cclock_flip", "rotate counter-clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = NPP_TRANSPOSE_CCLOCK_FLIP }, 0, 0, FLAGS, "dir" },
+        { "clock",       "rotate clockwise",                            0, AV_OPT_TYPE_CONST, { .i64 = NPP_TRANSPOSE_CLOCK       }, 0, 0, FLAGS, "dir" },
+        { "cclock",      "rotate counter-clockwise",                    0, AV_OPT_TYPE_CONST, { .i64 = NPP_TRANSPOSE_CCLOCK      }, 0, 0, FLAGS, "dir" },
+        { "clock_flip",  "rotate clockwise with vertical flip",         0, AV_OPT_TYPE_CONST, { .i64 = NPP_TRANSPOSE_CLOCK_FLIP  }, 0, 0, FLAGS, "dir" },
+    { "passthrough", "do not apply transposition if the input matches the specified geometry", OFFSET(passthrough), AV_OPT_TYPE_INT, { .i64 = NPP_TRANSPOSE_PT_TYPE_NONE },  0, 2, FLAGS, "passthrough" },
+        { "none",      "always apply transposition",  0, AV_OPT_TYPE_CONST, { .i64 = NPP_TRANSPOSE_PT_TYPE_NONE },      0, 0, FLAGS, "passthrough" },
+        { "landscape", "preserve landscape geometry", 0, AV_OPT_TYPE_CONST, { .i64 = NPP_TRANSPOSE_PT_TYPE_LANDSCAPE }, 0, 0, FLAGS, "passthrough" },
+        { "portrait",  "preserve portrait geometry",  0, AV_OPT_TYPE_CONST, { .i64 = NPP_TRANSPOSE_PT_TYPE_PORTRAIT },  0, 0, FLAGS, "passthrough" },
+    { 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"),
+    .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,
+};