[FFmpeg-devel] [PATCH 1/2] avfilter: add scale_d3d11 filter
Dash Santosh Sathyanarayanan
dash.sathyanarayanan at multicorewareinc.com
Thu May 22 16:20:17 EEST 2025
This commit introduces a new hardware-accelerated video filter, scale_d3d11,
which performs scaling and format conversion using Direct3D 11. The filter enables
efficient GPU-based scaling and pixel format conversion (p010 to nv12), reducing
CPU overhead and latency in video pipelines.
---
Changelog | 1 +
libavcodec/decode.c | 2 +-
libavcodec/dxva2.c | 3 +
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_scale_d3d11.c | 480 ++++++++++++++++++++++++++++++++++
libavutil/hwcontext_d3d11va.c | 40 ++-
7 files changed, 514 insertions(+), 14 deletions(-)
create mode 100644 libavfilter/vf_scale_d3d11.c
diff --git a/Changelog b/Changelog
index 4217449438..68610a63d0 100644
--- a/Changelog
+++ b/Changelog
@@ -18,6 +18,7 @@ version <next>:
- APV encoding support through a libopenapv wrapper
- VVC decoder supports all content of SCC (Screen Content Coding):
IBC (Inter Block Copy), Palette Mode and ACT (Adaptive Color Transform
+- vf_scale_d3d11 filter
version 7.1:
diff --git a/libavcodec/decode.c b/libavcodec/decode.c
index c2b2dd6e3b..a796ae7930 100644
--- a/libavcodec/decode.c
+++ b/libavcodec/decode.c
@@ -1079,7 +1079,7 @@ int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx,
if (frames_ctx->initial_pool_size) {
// We guarantee 4 base work surfaces. The function above guarantees 1
// (the absolute minimum), so add the missing count.
- frames_ctx->initial_pool_size += 3;
+ frames_ctx->initial_pool_size += 33;
}
ret = av_hwframe_ctx_init(avctx->hw_frames_ctx);
diff --git a/libavcodec/dxva2.c b/libavcodec/dxva2.c
index 22ecd5acaf..37dab6cd68 100644
--- a/libavcodec/dxva2.c
+++ b/libavcodec/dxva2.c
@@ -647,6 +647,9 @@ int ff_dxva2_common_frame_params(AVCodecContext *avctx,
AVD3D11VAFramesContext *frames_hwctx = frames_ctx->hwctx;
frames_hwctx->BindFlags |= D3D11_BIND_DECODER;
+ if (frames_ctx->sw_format == AV_PIX_FMT_NV12) {
+ frames_hwctx->BindFlags |= D3D11_BIND_VIDEO_ENCODER;
+ }
}
#endif
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 0effe4127f..dc46e946f2 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -461,6 +461,7 @@ OBJS-$(CONFIG_ROBERTS_OPENCL_FILTER) += vf_convolution_opencl.o opencl.o
OBJS-$(CONFIG_ROTATE_FILTER) += vf_rotate.o
OBJS-$(CONFIG_SAB_FILTER) += vf_sab.o
OBJS-$(CONFIG_SCALE_FILTER) += vf_scale.o scale_eval.o framesync.o
+OBJS-$(CONFIG_SCALE_D3D11_FILTER) += vf_scale_d3d11.o scale_eval.o
OBJS-$(CONFIG_SCALE_CUDA_FILTER) += vf_scale_cuda.o scale_eval.o \
vf_scale_cuda.ptx.o cuda/load_helper.o
OBJS-$(CONFIG_SCALE_NPP_FILTER) += vf_scale_npp.o scale_eval.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 5ea33cdf01..a20fff57e7 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -435,6 +435,7 @@ extern const FFFilter ff_vf_scale;
extern const FFFilter ff_vf_vpp_amf;
extern const FFFilter ff_vf_sr_amf;
extern const FFFilter ff_vf_scale_cuda;
+extern const FFFilter ff_vf_scale_d3d11;
extern const FFFilter ff_vf_scale_npp;
extern const FFFilter ff_vf_scale_qsv;
extern const FFFilter ff_vf_scale_vaapi;
diff --git a/libavfilter/vf_scale_d3d11.c b/libavfilter/vf_scale_d3d11.c
new file mode 100644
index 0000000000..e079424002
--- /dev/null
+++ b/libavfilter/vf_scale_d3d11.c
@@ -0,0 +1,480 @@
+/*
+ * Copyright (C) 2025 MulticorewWare, Inc.
+ *
+ * Authors: Dash Santosh <dash.sathanatayanan at multicorewareinc.com>
+ * Sachin <sachin.prakash at multicorewareinc.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 "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+#include "compat/w32dlfcn.h"
+
+#include "libavutil/hwcontext.h"
+#include "libavutil/hwcontext_d3d11va.h"
+
+#include "filters.h"
+#include "scale_eval.h"
+#include "video.h"
+
+enum OutputFormat {
+ OUTPUT_NV12 = 0,
+ OUTPUT_P010 = 1,
+};
+
+typedef struct ScaleD3D11Context {
+ const AVClass *classCtx;
+ char *w_expr;
+ char *h_expr;
+ int output_format_opt;
+
+ ///< D3D11 objects
+ ID3D11Device *device;
+ ID3D11DeviceContext *context;
+ ID3D11VideoDevice *videoDevice;
+ ID3D11VideoProcessor *processor;
+ ID3D11VideoProcessorEnumerator *enumerator;
+ ID3D11VideoProcessorOutputView *outputView;
+ ID3D11VideoProcessorInputView *inputView;
+
+ ///< Buffer references
+ AVBufferRef *hw_device_ctx;
+ AVBufferRef *hw_frames_ctx_out;
+
+ ///< Dimensions and formats
+ int width, height;
+ int inputWidth, inputHeight;
+ DXGI_FORMAT input_format;
+ DXGI_FORMAT output_format;
+} ScaleD3D11Context;
+
+static av_cold int scale_d3d11_init(AVFilterContext *ctx) {
+ ///< all real work is done in config_props and filter_frame
+ return 0;
+}
+
+static void release_d3d11_resources(ScaleD3D11Context *s) {
+ if (s->outputView) {
+ s->outputView->lpVtbl->Release(s->outputView);
+ s->outputView = NULL;
+ }
+
+ if (s->processor) {
+ s->processor->lpVtbl->Release(s->processor);
+ s->processor = NULL;
+ }
+
+ if (s->enumerator) {
+ s->enumerator->lpVtbl->Release(s->enumerator);
+ s->enumerator = NULL;
+ }
+
+ if (s->videoDevice) {
+ s->videoDevice->lpVtbl->Release(s->videoDevice);
+ s->videoDevice = NULL;
+ }
+}
+
+static int scale_d3d11_configure_processor(ScaleD3D11Context *s, AVFilterContext *ctx) {
+ HRESULT hr;
+
+ switch (s->output_format_opt) {
+ case OUTPUT_NV12:
+ s->output_format = DXGI_FORMAT_NV12;
+ break;
+ case OUTPUT_P010:
+ s->output_format = DXGI_FORMAT_P010;
+ break;
+ default:
+ av_log(ctx, AV_LOG_ERROR, "Invalid output format specified\n");
+ return AVERROR(EINVAL);
+ }
+
+ ///< Get D3D11 device and context from hardware device context
+ AVHWDeviceContext *hwctx = (AVHWDeviceContext *)s->hw_device_ctx->data;
+ AVD3D11VADeviceContext *d3d11_hwctx = (AVD3D11VADeviceContext *)hwctx->hwctx;
+ s->device = d3d11_hwctx->device;
+ s->context = d3d11_hwctx->device_context;
+
+ av_log(ctx, AV_LOG_VERBOSE, "Configuring D3D11 video processor: %dx%d -> %dx%d\n",
+ s->inputWidth, s->inputHeight, s->width, s->height);
+
+ ///< Define the video processor content description
+ D3D11_VIDEO_PROCESSOR_CONTENT_DESC contentDesc = {
+ .InputFrameFormat = D3D11_VIDEO_FRAME_FORMAT_PROGRESSIVE,
+ .InputWidth = s->inputWidth,
+ .InputHeight = s->inputHeight,
+ .OutputWidth = s->width,
+ .OutputHeight = s->height,
+ .Usage = D3D11_VIDEO_USAGE_PLAYBACK_NORMAL,
+ };
+
+ ///< Query video device interface
+ hr = s->device->lpVtbl->QueryInterface(s->device, &IID_ID3D11VideoDevice, (void **)&s->videoDevice);
+ if (FAILED(hr)) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to get D3D11 video device interface: HRESULT 0x%lX\n", hr);
+ return AVERROR_EXTERNAL;
+ }
+
+ ///< Create video processor enumerator
+ hr = s->videoDevice->lpVtbl->CreateVideoProcessorEnumerator(s->videoDevice, &contentDesc, &s->enumerator);
+ if (FAILED(hr)) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to create video processor enumerator: HRESULT 0x%lX\n", hr);
+ return AVERROR_EXTERNAL;
+ }
+
+ ///< Create the video processor
+ hr = s->videoDevice->lpVtbl->CreateVideoProcessor(s->videoDevice, s->enumerator, 0, &s->processor);
+ if (FAILED(hr)) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to create video processor: HRESULT 0x%lX\n", hr);
+ return AVERROR_EXTERNAL;
+ }
+
+ av_log(ctx, AV_LOG_VERBOSE, "D3D11 video processor successfully configured\n");
+ return 0;
+}
+
+static int scale_d3d11_filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ ScaleD3D11Context *s = ctx->priv;
+ AVFilterLink *outlink = ctx->outputs[0];
+ ID3D11VideoProcessorInputView *inputView = NULL;
+ ID3D11VideoContext *videoContext = NULL;
+ AVFrame *out = NULL;
+ int ret = 0;
+ HRESULT hr;
+
+ ///< Validate input frame
+ if (!in) {
+ av_log(ctx, AV_LOG_ERROR, "Null input frame\n");
+ return AVERROR(EINVAL);
+ }
+
+ if (!in->hw_frames_ctx) {
+ av_log(ctx, AV_LOG_ERROR, "No hardware frames context in input frame\n");
+ av_frame_free(&in);
+ return AVERROR(EINVAL);
+ }
+
+ ///< Verify hardware device contexts
+ AVHWFramesContext *frames_ctx = (AVHWFramesContext *)in->hw_frames_ctx->data;
+
+ if (!s->hw_device_ctx) {
+ av_log(ctx, AV_LOG_ERROR, "Filter hardware device context is uninitialized\n");
+ av_frame_free(&in);
+ return AVERROR(EINVAL);
+ }
+
+ AVHWDeviceContext *input_device_ctx = (AVHWDeviceContext *)frames_ctx->device_ref->data;
+ AVHWDeviceContext *filter_device_ctx = (AVHWDeviceContext *)s->hw_device_ctx->data;
+
+ if (input_device_ctx->type != filter_device_ctx->type) {
+ av_log(ctx, AV_LOG_ERROR, "Mismatch between input and filter hardware device types\n");
+ av_frame_free(&in);
+ return AVERROR(EINVAL);
+ }
+
+ ///< Allocate output frame
+ out = av_frame_alloc();
+ if (!out) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to allocate output frame\n");
+ av_frame_free(&in);
+ return AVERROR(ENOMEM);
+ }
+
+ ret = av_hwframe_get_buffer(s->hw_frames_ctx_out, out, 0);
+ if (ret < 0) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to get output frame from pool\n");
+ av_frame_free(&in);
+ av_frame_free(&out);
+ return ret;
+ }
+
+ ///< Configure the D3D11 video processor if not already configured
+ if (!s->processor) {
+ ///< Get info from input texture
+ D3D11_TEXTURE2D_DESC textureDesc;
+ ID3D11Texture2D *input_texture = (ID3D11Texture2D *)in->data[0];
+ input_texture->lpVtbl->GetDesc(input_texture, &textureDesc);
+
+ s->inputWidth = textureDesc.Width;
+ s->inputHeight = textureDesc.Height;
+ s->input_format = textureDesc.Format;
+
+ ret = scale_d3d11_configure_processor(s, ctx);
+ if (ret < 0) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to configure processor\n");
+ av_frame_free(&in);
+ av_frame_free(&out);
+ return ret;
+ }
+ }
+
+ ///< Get input texture and prepare input view
+ ID3D11Texture2D *d3d11_texture = (ID3D11Texture2D *)in->data[0];
+ int subIdx = (int)(intptr_t)in->data[1];
+
+ D3D11_VIDEO_PROCESSOR_INPUT_VIEW_DESC inputViewDesc = {
+ .FourCC = s->input_format,
+ .ViewDimension = D3D11_VPIV_DIMENSION_TEXTURE2D,
+ .Texture2D.ArraySlice = subIdx
+ };
+
+ hr = s->videoDevice->lpVtbl->CreateVideoProcessorInputView(
+ s->videoDevice, (ID3D11Resource *)d3d11_texture, s->enumerator, &inputViewDesc, &inputView);
+ if (FAILED(hr)) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to create input view: HRESULT 0x%lX\n", hr);
+ av_frame_free(&in);
+ av_frame_free(&out);
+ return AVERROR_EXTERNAL;
+ }
+
+ ///< Create output view for current texture
+ ID3D11Texture2D *output_texture = (ID3D11Texture2D *)out->data[0];
+ D3D11_VIDEO_PROCESSOR_OUTPUT_VIEW_DESC outputViewDesc = {
+ .ViewDimension = D3D11_VPOV_DIMENSION_TEXTURE2D,
+ .Texture2D = { .MipSlice = 0 },
+ };
+
+ hr = s->videoDevice->lpVtbl->CreateVideoProcessorOutputView(
+ s->videoDevice, (ID3D11Resource *)output_texture, s->enumerator, &outputViewDesc, &s->outputView);
+ if (FAILED(hr)) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to create output view: HRESULT 0x%lX\n", hr);
+ av_frame_free(&in);
+ av_frame_free(&out);
+ return AVERROR_EXTERNAL;
+ }
+
+ ///< Set up processing stream
+ D3D11_VIDEO_PROCESSOR_STREAM stream = {
+ .Enable = TRUE,
+ .pInputSurface = inputView,
+ .OutputIndex = 0
+ };
+
+ ///< Get video context
+ hr = s->context->lpVtbl->QueryInterface(s->context, &IID_ID3D11VideoContext, (void **)&videoContext);
+ if (FAILED(hr)) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to get video context: HRESULT 0x%lX\n", hr);
+ inputView->lpVtbl->Release(inputView);
+ av_frame_free(&in);
+ av_frame_free(&out);
+ return AVERROR_EXTERNAL;
+ }
+
+ ///< Process the frame
+ hr = videoContext->lpVtbl->VideoProcessorBlt(videoContext, s->processor, s->outputView, 0, 1, &stream);
+ if (FAILED(hr)) {
+ av_log(ctx, AV_LOG_ERROR, "VideoProcessorBlt failed: HRESULT 0x%lX\n", hr);
+ videoContext->lpVtbl->Release(videoContext);
+ inputView->lpVtbl->Release(inputView);
+ av_frame_free(&in);
+ av_frame_free(&out);
+ return AVERROR_EXTERNAL;
+ }
+
+ ///< Set up output frame
+ ret = av_frame_copy_props(out, in);
+ if (ret < 0) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to copy frame properties\n");
+ videoContext->lpVtbl->Release(videoContext);
+ inputView->lpVtbl->Release(inputView);
+ av_frame_free(&in);
+ av_frame_free(&out);
+ return ret;
+ }
+
+ out->data[0] = (uint8_t *)output_texture;
+ out->data[1] = (uint8_t *)(intptr_t)0;
+ out->width = s->width;
+ out->height = s->height;
+ out->format = AV_PIX_FMT_D3D11;
+
+ ///< Clean up resources
+ inputView->lpVtbl->Release(inputView);
+ videoContext->lpVtbl->Release(videoContext);
+ if (s->outputView) {
+ s->outputView->lpVtbl->Release(s->outputView);
+ s->outputView = NULL;
+ }
+ av_frame_free(&in);
+
+ ///< Forward the frame
+ return ff_filter_frame(outlink, out);
+}
+
+static int scale_d3d11_config_props(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ ScaleD3D11Context *s = ctx->priv;
+ AVFilterLink *inlink = ctx->inputs[0];
+ FilterLink *inl = ff_filter_link(inlink);
+ FilterLink *outl = ff_filter_link(outlink);
+ int ret;
+
+ ///< Clean up any previous resources
+ release_d3d11_resources(s);
+
+ ///< Evaluate output dimensions
+ ret = ff_scale_eval_dimensions(s, s->w_expr, s->h_expr, inlink, outlink, &s->width, &s->height);
+ if (ret < 0) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to evaluate dimensions\n");
+ return ret;
+ }
+
+ outlink->w = s->width;
+ outlink->h = s->height;
+
+ ///< Validate input hw_frames_ctx
+ if (!inl->hw_frames_ctx) {
+ av_log(ctx, AV_LOG_ERROR, "No hw_frames_ctx available on input link\n");
+ return AVERROR(EINVAL);
+ }
+
+ ///< Propagate hw_frames_ctx to output
+ outl->hw_frames_ctx = av_buffer_ref(inl->hw_frames_ctx);
+ if (!outl->hw_frames_ctx) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to propagate hw_frames_ctx to output\n");
+ return AVERROR(ENOMEM);
+ }
+
+ ///< Initialize filter's hardware device context
+ if (!s->hw_device_ctx) {
+ AVHWFramesContext *in_frames_ctx = (AVHWFramesContext *)inl->hw_frames_ctx->data;
+ s->hw_device_ctx = av_buffer_ref(in_frames_ctx->device_ref);
+ if (!s->hw_device_ctx) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to initialize filter hardware device context\n");
+ return AVERROR(ENOMEM);
+ }
+ }
+
+ ///< Get D3D11 device and context (but don't initialize processor yet - done in filter_frame)
+ AVHWDeviceContext *hwctx = (AVHWDeviceContext *)s->hw_device_ctx->data;
+ AVD3D11VADeviceContext *d3d11_hwctx = (AVD3D11VADeviceContext *)hwctx->hwctx;
+
+ s->device = d3d11_hwctx->device;
+ s->context = d3d11_hwctx->device_context;
+
+ if (!s->device || !s->context) {
+ av_log(ctx, AV_LOG_ERROR, "Failed to get valid D3D11 device or context\n");
+ return AVERROR(EINVAL);
+ }
+
+ ///< Create new hardware frames context for output
+ AVHWFramesContext *in_frames_ctx = (AVHWFramesContext *)inl->hw_frames_ctx->data;
+ s->hw_frames_ctx_out = av_hwframe_ctx_alloc(s->hw_device_ctx);
+ if (!s->hw_frames_ctx_out)
+ return AVERROR(ENOMEM);
+
+ enum AVPixelFormat sw_format;
+ switch (s->output_format_opt) {
+ case OUTPUT_NV12:
+ sw_format = AV_PIX_FMT_NV12;
+ break;
+ case OUTPUT_P010:
+ sw_format = AV_PIX_FMT_P010;
+ break;
+ default:
+ return AVERROR(EINVAL);
+ }
+
+ AVHWFramesContext *frames_ctx = (AVHWFramesContext *)s->hw_frames_ctx_out->data;
+ frames_ctx->format = AV_PIX_FMT_D3D11;
+ frames_ctx->sw_format = sw_format;
+ frames_ctx->width = s->width;
+ frames_ctx->height = s->height;
+ frames_ctx->initial_pool_size = 30; ///< Adjust pool size as needed
+
+ AVD3D11VAFramesContext *frames_hwctx = frames_ctx->hwctx;
+ frames_hwctx->MiscFlags = 0;
+ frames_hwctx->BindFlags = D3D11_BIND_RENDER_TARGET | D3D11_BIND_VIDEO_ENCODER;
+
+ ret = av_hwframe_ctx_init(s->hw_frames_ctx_out);
+ if (ret < 0) {
+ av_buffer_unref(&s->hw_frames_ctx_out);
+ return ret;
+ }
+
+ outl->hw_frames_ctx = av_buffer_ref(s->hw_frames_ctx_out);
+ if (!outl->hw_frames_ctx)
+ return AVERROR(ENOMEM);
+
+ av_log(ctx, AV_LOG_VERBOSE, "D3D11 scale config: %dx%d -> %dx%d\n",
+ inlink->w, inlink->h, outlink->w, outlink->h);
+ return 0;
+}
+
+static av_cold void scale_d3d11_uninit(AVFilterContext *ctx) {
+ ScaleD3D11Context *s = ctx->priv;
+
+ ///< Release D3D11 resources
+ release_d3d11_resources(s);
+
+ ///< Free the hardware device context reference
+ av_buffer_unref(&s->hw_frames_ctx_out);
+ av_buffer_unref(&s->hw_device_ctx);
+
+ ///< Free option strings
+ av_freep(&s->w_expr);
+ av_freep(&s->h_expr);
+}
+
+static const AVFilterPad scale_d3d11_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = scale_d3d11_filter_frame,
+ },
+};
+
+static const AVFilterPad scale_d3d11_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = scale_d3d11_config_props,
+ },
+};
+
+#define OFFSET(x) offsetof(ScaleD3D11Context, x)
+#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
+
+static const AVOption scale_d3d11_options[] = {
+ { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, .flags = FLAGS },
+ { "height", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, .flags = FLAGS },
+ { "output_fmt", "Output format", OFFSET(output_format_opt), AV_OPT_TYPE_INT, {.i64 = OUTPUT_NV12}, 0, OUTPUT_P010, FLAGS, "fmt" },
+ { "nv12", "NV12 format", 0, AV_OPT_TYPE_CONST, {.i64 = OUTPUT_NV12}, 0, 0, FLAGS, "fmt" },
+ { "p010", "P010 format", 0, AV_OPT_TYPE_CONST, {.i64 = OUTPUT_P010}, 0, 0, FLAGS, "fmt" },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(scale_d3d11);
+
+const FFFilter ff_vf_scale_d3d11 = {
+ .p.name = "scale_d3d11",
+ .p.description = NULL_IF_CONFIG_SMALL("Scale video using Direct3D11"),
+ .priv_size = sizeof(ScaleD3D11Context),
+ .p.priv_class = &scale_d3d11_class,
+ .init = scale_d3d11_init,
+ .uninit = scale_d3d11_uninit,
+ FILTER_INPUTS(scale_d3d11_inputs),
+ FILTER_OUTPUTS(scale_d3d11_outputs),
+ FILTER_SINGLE_PIXFMT(AV_PIX_FMT_D3D11),
+ .p.flags = AVFILTER_FLAG_HWDEVICE,
+ .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
+};
\ No newline at end of file
diff --git a/libavutil/hwcontext_d3d11va.c b/libavutil/hwcontext_d3d11va.c
index 1a047ce57b..36694896e4 100644
--- a/libavutil/hwcontext_d3d11va.c
+++ b/libavutil/hwcontext_d3d11va.c
@@ -82,6 +82,8 @@ typedef struct D3D11VAFramesContext {
int nb_surfaces;
int nb_surfaces_used;
+ int retries;
+ int max_retries;
DXGI_FORMAT format;
@@ -258,7 +260,9 @@ static AVBufferRef *d3d11va_pool_alloc(void *opaque, size_t size)
ID3D11Texture2D_GetDesc(hwctx->texture, &texDesc);
if (s->nb_surfaces_used >= texDesc.ArraySize) {
- av_log(ctx, AV_LOG_ERROR, "Static surface pool size exceeded.\n");
+ if (s->retries >= s->max_retries) {
+ av_log(ctx, AV_LOG_ERROR, "Static surface pool size exceeded.\n");
+ }
return NULL;
}
@@ -339,20 +343,30 @@ static int d3d11va_frames_init(AVHWFramesContext *ctx)
static int d3d11va_get_buffer(AVHWFramesContext *ctx, AVFrame *frame)
{
AVD3D11FrameDescriptor *desc;
+ D3D11VAFramesContext *s = ctx->hwctx;
+ s->retries = 0;
+ s->max_retries = 50;
+
+ while (s->retries < s->max_retries) {
+
+ frame->buf[0] = av_buffer_pool_get(ctx->pool);
+ if (frame->buf[0]) {
+ desc = (AVD3D11FrameDescriptor *)frame->buf[0]->data;
+
+ frame->data[0] = (uint8_t *)desc->texture;
+ frame->data[1] = (uint8_t *)desc->index;
+ frame->format = AV_PIX_FMT_D3D11;
+ frame->width = ctx->width;
+ frame->height = ctx->height;
+
+ return 0;
+ }
- frame->buf[0] = av_buffer_pool_get(ctx->pool);
- if (!frame->buf[0])
- return AVERROR(ENOMEM);
-
- desc = (AVD3D11FrameDescriptor *)frame->buf[0]->data;
-
- frame->data[0] = (uint8_t *)desc->texture;
- frame->data[1] = (uint8_t *)desc->index;
- frame->format = AV_PIX_FMT_D3D11;
- frame->width = ctx->width;
- frame->height = ctx->height;
+ av_usleep(1000);
+ s->retries++;
+ }
- return 0;
+ return AVERROR(ENOMEM);
}
static int d3d11va_transfer_get_formats(AVHWFramesContext *ctx,
--
2.34.1
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