[FFmpeg-devel] [PATCH 17/23] avutil/hwcontext_d3d11va: Allocate pub and priv frames hwctx together

[Andreas Rheinhardt <andreas.rheinhardt@outlook.com>]

This is possible because the lifetime of both coincide.
Besides reducing the number of allocations this also simplifies
access to D3D11VAFramesContext as one no longer has to
go through AVHWFramesInternal.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavutil/hwcontext_d3d11va.c | 34 +++++++++++++++++++---------------
 1 file changed, 19 insertions(+), 15 deletions(-)

diff --git a/libavutil/hwcontext_d3d11va.c b/libavutil/hwcontext_d3d11va.c
index 2fd3561c88..19fcf37a84 100644
--- a/libavutil/hwcontext_d3d11va.c
+++ b/libavutil/hwcontext_d3d11va.c
@@ -72,6 +72,11 @@ static av_cold void load_functions(void)
 }
 
 typedef struct D3D11VAFramesContext {
+    /**
+     * The public AVD3D11VAFramesContext. See hwcontext_d3d11va.h for it.
+     */
+    AVD3D11VAFramesContext p;
+
     int nb_surfaces;
     int nb_surfaces_used;
 
@@ -113,8 +118,8 @@ static void d3d11va_default_unlock(void *ctx)
 
 static void d3d11va_frames_uninit(AVHWFramesContext *ctx)
 {
-    AVD3D11VAFramesContext *frames_hwctx = ctx->hwctx;
-    D3D11VAFramesContext *s = ctx->internal->priv;
+    D3D11VAFramesContext *s = ctx->hwctx;
+    AVD3D11VAFramesContext *frames_hwctx = &s->p;
 
     if (frames_hwctx->texture)
         ID3D11Texture2D_Release(frames_hwctx->texture);
@@ -169,8 +174,8 @@ static AVBufferRef *wrap_texture_buf(AVHWFramesContext *ctx, ID3D11Texture2D *te
 {
     AVBufferRef *buf;
     AVD3D11FrameDescriptor         *desc = av_mallocz(sizeof(*desc));
-    D3D11VAFramesContext              *s = ctx->internal->priv;
-    AVD3D11VAFramesContext *frames_hwctx = ctx->hwctx;
+    D3D11VAFramesContext              *s = ctx->hwctx;
+    AVD3D11VAFramesContext *frames_hwctx = &s->p;
     if (!desc) {
         ID3D11Texture2D_Release(tex);
         return NULL;
@@ -206,8 +211,8 @@ static AVBufferRef *wrap_texture_buf(AVHWFramesContext *ctx, ID3D11Texture2D *te
 
 static AVBufferRef *d3d11va_alloc_single(AVHWFramesContext *ctx)
 {
-    D3D11VAFramesContext       *s = ctx->internal->priv;
-    AVD3D11VAFramesContext *hwctx = ctx->hwctx;
+    D3D11VAFramesContext       *s = ctx->hwctx;
+    AVD3D11VAFramesContext *hwctx = &s->p;
     AVD3D11VADeviceContext *device_hwctx = ctx->device_ctx->hwctx;
     HRESULT hr;
     ID3D11Texture2D *tex;
@@ -235,8 +240,8 @@ static AVBufferRef *d3d11va_alloc_single(AVHWFramesContext *ctx)
 static AVBufferRef *d3d11va_pool_alloc(void *opaque, size_t size)
 {
     AVHWFramesContext        *ctx = (AVHWFramesContext*)opaque;
-    D3D11VAFramesContext       *s = ctx->internal->priv;
-    AVD3D11VAFramesContext *hwctx = ctx->hwctx;
+    D3D11VAFramesContext       *s = ctx->hwctx;
+    AVD3D11VAFramesContext *hwctx = &s->p;
     D3D11_TEXTURE2D_DESC  texDesc;
 
     if (!hwctx->texture)
@@ -255,9 +260,9 @@ static AVBufferRef *d3d11va_pool_alloc(void *opaque, size_t size)
 
 static int d3d11va_frames_init(AVHWFramesContext *ctx)
 {
-    AVD3D11VAFramesContext *hwctx        = ctx->hwctx;
     AVD3D11VADeviceContext *device_hwctx = ctx->device_ctx->hwctx;
-    D3D11VAFramesContext              *s = ctx->internal->priv;
+    D3D11VAFramesContext              *s = ctx->hwctx;
+    AVD3D11VAFramesContext        *hwctx = &s->p;
 
     int i;
     HRESULT hr;
@@ -345,7 +350,7 @@ static int d3d11va_transfer_get_formats(AVHWFramesContext *ctx,
                                         enum AVHWFrameTransferDirection dir,
                                         enum AVPixelFormat **formats)
 {
-    D3D11VAFramesContext *s = ctx->internal->priv;
+    D3D11VAFramesContext *s = ctx->hwctx;
     enum AVPixelFormat *fmts;
 
     fmts = av_malloc_array(2, sizeof(*fmts));
@@ -367,7 +372,7 @@ static int d3d11va_transfer_get_formats(AVHWFramesContext *ctx,
 static int d3d11va_create_staging_texture(AVHWFramesContext *ctx, DXGI_FORMAT format)
 {
     AVD3D11VADeviceContext *device_hwctx = ctx->device_ctx->hwctx;
-    D3D11VAFramesContext              *s = ctx->internal->priv;
+    D3D11VAFramesContext              *s = ctx->hwctx;
     HRESULT hr;
     D3D11_TEXTURE2D_DESC texDesc = {
         .Width          = ctx->width,
@@ -407,7 +412,7 @@ static int d3d11va_transfer_data(AVHWFramesContext *ctx, AVFrame *dst,
                                  const AVFrame *src)
 {
     AVD3D11VADeviceContext *device_hwctx = ctx->device_ctx->hwctx;
-    D3D11VAFramesContext              *s = ctx->internal->priv;
+    D3D11VAFramesContext              *s = ctx->hwctx;
     int download = src->format == AV_PIX_FMT_D3D11;
     const AVFrame *frame = download ? src : dst;
     const AVFrame *other = download ? dst : src;
@@ -696,8 +701,7 @@ const HWContextType ff_hwcontext_type_d3d11va = {
     .name                 = "D3D11VA",
 
     .device_hwctx_size    = sizeof(AVD3D11VADeviceContext),
-    .frames_hwctx_size    = sizeof(AVD3D11VAFramesContext),
-    .frames_priv_size     = sizeof(D3D11VAFramesContext),
+    .frames_hwctx_size    = sizeof(D3D11VAFramesContext),
 
     .device_create        = d3d11va_device_create,
     .device_init          = d3d11va_device_init,
-- 
2.34.1

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