@@ -2382,6 +2382,7 @@ frei0r_filter_extralibs='$ldl'

 frei0r_src_filter_deps="frei0r dlopen"

 frei0r_src_filter_extralibs='$ldl'

 hqdn3d_filter_deps="gpl"

+hwupload_cuda_filter_deps="cuda"

 interlace_filter_deps="gpl"

 ocv_filter_deps="libopencv"

 resample_filter_deps="avresample"

@@ -1610,6 +1610,17 @@ A floating point number which specifies chroma temporal strength. It defaults to

 @var{luma_tmp}*@var{chroma_spatial}/@var{luma_spatial}.

 @end table

+@section hwupload_cuda

+

+Upload system memory frames to a CUDA device.

+

+It accepts the following optional parameters:

+

+@table @option

+@item device

+The number of the CUDA device to use

+@end table

+

 @section interlace

 Simple interlacing filter from progressive contents. This interleaves upper (or

@@ -56,6 +56,7 @@ OBJS-$(CONFIG_FREI0R_FILTER)                 += vf_frei0r.o

 OBJS-$(CONFIG_GRADFUN_FILTER)                += vf_gradfun.o

 OBJS-$(CONFIG_HFLIP_FILTER)                  += vf_hflip.o

 OBJS-$(CONFIG_HQDN3D_FILTER)                 += vf_hqdn3d.o

+OBJS-$(CONFIG_HWUPLOAD_CUDA_FILTER)          += vf_hwupload_cuda.o

 OBJS-$(CONFIG_INTERLACE_FILTER)              += vf_interlace.o

 OBJS-$(CONFIG_LUT_FILTER)                    += vf_lut.o

 OBJS-$(CONFIG_LUTRGB_FILTER)                 += vf_lut.o

@@ -82,6 +82,7 @@ void avfilter_register_all(void)

     REGISTER_FILTER(GRADFUN,        gradfun,        vf);

     REGISTER_FILTER(HFLIP,          hflip,          vf);

     REGISTER_FILTER(HQDN3D,         hqdn3d,         vf);

+    REGISTER_FILTER(HWUPLOAD_CUDA,  hwupload_cuda,  vf);

     REGISTER_FILTER(INTERLACE,      interlace,      vf);

     REGISTER_FILTER(LUT,            lut,            vf);

     REGISTER_FILTER(LUTRGB,         lutrgb,         vf);

new file mode 100644

@@ -0,0 +1,237 @@

+/*

+ * 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

+ */

+

+#include "libavutil/buffer.h"

+#include "libavutil/hwcontext.h"

+#include "libavutil/hwcontext_cuda.h"

+#include "libavutil/log.h"

+#include "libavutil/opt.h"

+

+#include "avfilter.h"

+#include "formats.h"

+#include "internal.h"

+#include "video.h"

+

+typedef struct CudaUploadContext {

+    const AVClass *class;

+    int device_idx;

+

+    AVBufferRef *hwdevice;

+    AVBufferRef *hwframe;

+} CudaUploadContext;

+

+static void cudaupload_ctx_free(AVHWDeviceContext *ctx)

+{

+    AVCUDADeviceContext *hwctx = ctx->hwctx;

+    cuCtxDestroy(hwctx->cuda_ctx);

+}

+

+static av_cold int cudaupload_init(AVFilterContext *ctx)

+{

+    CudaUploadContext *s = ctx->priv;

+

+    AVHWDeviceContext   *device_ctx;

+    AVCUDADeviceContext *device_hwctx;

+    CUdevice device;

+    CUcontext cuda_ctx = NULL, dummy;

+    CUresult err;

+    int ret;

+

+    err = cuInit(0);

+    if (err != CUDA_SUCCESS) {

+        av_log(ctx, AV_LOG_ERROR, "Could not initialize the CUDA driver API\n");

+        return AVERROR_UNKNOWN;

+    }

+

+    err = cuDeviceGet(&device, s->device_idx);

+    if (err != CUDA_SUCCESS) {

+        av_log(ctx, AV_LOG_ERROR, "Could not get the device number %d\n", s->device_idx);

+        return AVERROR_UNKNOWN;

+    }

+

+    err = cuCtxCreate(&cuda_ctx, 0, device);

+    if (err != CUDA_SUCCESS) {

+        av_log(ctx, AV_LOG_ERROR, "Error creating a CUDA context\n");

+        return AVERROR_UNKNOWN;

+    }

+

+    cuCtxPopCurrent(&dummy);

+

+    s->hwdevice = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_CUDA);

+    if (!s->hwdevice) {

+        cuCtxDestroy(cuda_ctx);

+        return AVERROR(ENOMEM);

+    }

+

+    device_ctx       = (AVHWDeviceContext*)s->hwdevice->data;

+    device_ctx->free = cudaupload_ctx_free;

+

+    device_hwctx = device_ctx->hwctx;

+    device_hwctx->cuda_ctx = cuda_ctx;

+

+    ret = av_hwdevice_ctx_init(s->hwdevice);

+    if (ret < 0)

+        return ret;

+

+    return 0;

+}

+

+static av_cold void cudaupload_uninit(AVFilterContext *ctx)

+{

+    CudaUploadContext *s = ctx->priv;

+

+    av_buffer_unref(&s->hwframe);

+    av_buffer_unref(&s->hwdevice);

+}

+

+static int cudaupload_query_formats(AVFilterContext *ctx)

+{

+    static const enum AVPixelFormat input_pix_fmts[] = {

+        AV_PIX_FMT_NV12, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV444P,

+        AV_PIX_FMT_NONE,

+    };

+    static const enum AVPixelFormat output_pix_fmts[] = {

+        AV_PIX_FMT_CUDA, AV_PIX_FMT_NONE,

+    };

+    AVFilterFormats *in_fmts  = ff_make_format_list(input_pix_fmts);

+    AVFilterFormats *out_fmts = ff_make_format_list(output_pix_fmts);

+

+    ff_formats_ref(in_fmts,  &ctx->inputs[0]->out_formats);

+    ff_formats_ref(out_fmts, &ctx->outputs[0]->in_formats);

+

+    return 0;

+}

+

+static int cudaupload_config_output(AVFilterLink *outlink)

+{

+    AVFilterContext *ctx = outlink->src;

+    AVFilterLink *inlink = ctx->inputs[0];

+    CudaUploadContext *s = ctx->priv;

+

+    AVHWFramesContext *hwframe_ctx;

+    int ret;

+

+    av_buffer_unref(&s->hwframe);

+    s->hwframe = av_hwframe_ctx_alloc(s->hwdevice);

+    if (!s->hwframe)

+        return AVERROR(ENOMEM);

+

+    hwframe_ctx            = (AVHWFramesContext*)s->hwframe->data;

+    hwframe_ctx->format    = AV_PIX_FMT_CUDA;

+    hwframe_ctx->sw_format = inlink->format;

+    hwframe_ctx->width     = FFALIGN(inlink->w, 16);

+    hwframe_ctx->height    = FFALIGN(inlink->h, 16);

+

+    ret = av_hwframe_ctx_init(s->hwframe);

+    if (ret < 0)

+        return ret;

+

+    outlink->hw_frames_ctx = av_buffer_ref(s->hwframe);

+    if (!outlink->hw_frames_ctx)

+        return AVERROR(ENOMEM);

+

+    return 0;

+}

+

+static int cudaupload_filter_frame(AVFilterLink *link, AVFrame *in)

+{

+    AVFilterContext   *ctx = link->dst;

+    CudaUploadContext   *s = ctx->priv;

+

+    AVFrame *out = NULL;

+    int ret;

+

+    out = av_frame_alloc();

+    if (!out) {

+        ret = AVERROR(ENOMEM);

+        goto fail;

+    }

+

+    ret = av_hwframe_get_buffer(s->hwframe, out, 0);

+    if (ret < 0)

+        goto fail;

+

+    out->width  = in->width;

+    out->height = in->height;

+

+    ret = av_hwframe_transfer_data(out, in, 0);

+    if (ret < 0) {

+        av_log(ctx, AV_LOG_ERROR, "Error transferring data to the GPU\n");

+        goto fail;

+    }

+

+    ret = av_frame_copy_props(out, in);

+    if (ret < 0)

+        goto fail;

+

+    av_frame_free(&in);

+

+    return ff_filter_frame(ctx->outputs[0], out);

+fail:

+    av_frame_free(&in);

+    av_frame_free(&out);

+    return ret;

+}

+

+#define OFFSET(x) offsetof(CudaUploadContext, x)

+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM

+static const AVOption options[] = {

+    { "device", "Number of the device to use", OFFSET(device_idx), AV_OPT_TYPE_INT, { .i64 = 0 }, .flags = FLAGS },

+    { NULL },

+};

+

+static const AVClass cudaupload_class = {

+    .class_name = "cudaupload",

+    .item_name  = av_default_item_name,

+    .option     = options,

+    .version    = LIBAVUTIL_VERSION_INT,

+};

+

+static const AVFilterPad cudaupload_inputs[] = {

+    {

+        .name         = "default",

+        .type         = AVMEDIA_TYPE_VIDEO,

+        .filter_frame = cudaupload_filter_frame,

+    },

+    { NULL }

+};

+

+static const AVFilterPad cudaupload_outputs[] = {

+    {

+        .name         = "default",

+        .type         = AVMEDIA_TYPE_VIDEO,

+        .config_props = cudaupload_config_output,

+    },

+    { NULL }

+};

+

+AVFilter ff_vf_hwupload_cuda = {

+    .name        = "hwupload_cuda",

+    .description = NULL_IF_CONFIG_SMALL("Upload a system memory frame to a CUDA device"),

+

+    .init      = cudaupload_init,

+    .uninit    = cudaupload_uninit,

+

+    .query_formats = cudaupload_query_formats,

+

+    .priv_size  = sizeof(CudaUploadContext),

+    .priv_class = &cudaupload_class,

+

+    .inputs    = cudaupload_inputs,

+    .outputs   = cudaupload_outputs,

+};