hwcontext: add a dxva2 implementation

1 files changed, 292 insertions, 0 deletions

diff --git a/libavutil/hwcontext_dxva2.c b/libavutil/hwcontext_dxva2.c
new file mode 100644
index 0000000000..62cca6f6a4
--- /dev/null
+++ b/libavutil/hwcontext_dxva2.c
@@ -0,0 +1,292 @@
+/*
+ * 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 <windows.h>
+
+#if !defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600
+#undef _WIN32_WINNT
+#define _WIN32_WINNT 0x0600
+#endif
+#define DXVA2API_USE_BITFIELDS
+#define COBJMACROS
+
+#include <d3d9.h>
+#include <dxva2api.h>
+#include <initguid.h>
+
+#include "common.h"
+#include "hwcontext.h"
+#include "hwcontext_dxva2.h"
+#include "hwcontext_internal.h"
+#include "imgutils.h"
+#include "pixdesc.h"
+#include "pixfmt.h"
+
+typedef struct DXVA2FramesContext {
+    IDirect3DSurface9 **surfaces_internal;
+    int              nb_surfaces_used;
+
+    HANDLE  device_handle;
+    IDirectXVideoAccelerationService *service;
+
+    D3DFORMAT format;
+} DXVA2FramesContext;
+
+static const struct {
+    D3DFORMAT d3d_format;
+    enum AVPixelFormat pix_fmt;
+} supported_formats[] = {
+    { MKTAG('N', 'V', '1', '2'), AV_PIX_FMT_NV12 },
+};
+
+DEFINE_GUID(video_decoder_service,   0xfc51a551, 0xd5e7, 0x11d9, 0xaf, 0x55, 0x00, 0x05, 0x4e, 0x43, 0xff, 0x02);
+DEFINE_GUID(video_processor_service, 0xfc51a552, 0xd5e7, 0x11d9, 0xaf, 0x55, 0x00, 0x05, 0x4e, 0x43, 0xff, 0x02);
+
+static void dxva2_frames_uninit(AVHWFramesContext *ctx)
+{
+    AVDXVA2DeviceContext *device_hwctx = ctx->device_ctx->hwctx;
+    AVDXVA2FramesContext *frames_hwctx = ctx->hwctx;
+    DXVA2FramesContext *s = ctx->internal->priv;
+    int i;
+
+    if (frames_hwctx->decoder_to_release)
+        IDirectXVideoDecoder_Release(frames_hwctx->decoder_to_release);
+
+    if (s->surfaces_internal) {
+        for (i = 0; i < frames_hwctx->nb_surfaces; i++) {
+            if (s->surfaces_internal[i])
+                IDirect3DSurface9_Release(s->surfaces_internal[i]);
+        }
+    }
+    av_freep(&s->surfaces_internal);
+
+    if (s->service) {
+        IDirectXVideoAccelerationService_Release(s->service);
+        s->service = NULL;
+    }
+
+    if (s->device_handle != INVALID_HANDLE_VALUE) {
+        IDirect3DDeviceManager9_CloseDeviceHandle(device_hwctx->devmgr, s->device_handle);
+        s->device_handle = INVALID_HANDLE_VALUE;
+    }
+}
+
+static AVBufferRef *dxva2_pool_alloc(void *opaque, int size)
+{
+    AVHWFramesContext      *ctx = (AVHWFramesContext*)opaque;
+    DXVA2FramesContext       *s = ctx->internal->priv;
+    AVDXVA2FramesContext *hwctx = ctx->hwctx;
+
+    if (s->nb_surfaces_used < hwctx->nb_surfaces) {
+        s->nb_surfaces_used++;
+        return av_buffer_create((uint8_t*)s->surfaces_internal[s->nb_surfaces_used - 1],
+                                sizeof(*hwctx->surfaces), NULL, 0, 0);
+    }
+
+    return NULL;
+}
+
+static int dxva2_init_pool(AVHWFramesContext *ctx)
+{
+    AVDXVA2FramesContext *frames_hwctx = ctx->hwctx;
+    AVDXVA2DeviceContext *device_hwctx = ctx->device_ctx->hwctx;
+    DXVA2FramesContext              *s = ctx->internal->priv;
+    int decode = (frames_hwctx->surface_type == DXVA2_VideoDecoderRenderTarget);
+
+    int i;
+    HRESULT hr;
+
+    if (ctx->initial_pool_size <= 0)
+        return 0;
+
+    hr = IDirect3DDeviceManager9_OpenDeviceHandle(device_hwctx->devmgr, &s->device_handle);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to open device handle\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    hr = IDirect3DDeviceManager9_GetVideoService(device_hwctx->devmgr,
+                                                 s->device_handle,
+                                                 decode ? &video_decoder_service : &video_processor_service,
+                                                 (void **)&s->service);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to create the video service\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    for (i = 0; i < FF_ARRAY_ELEMS(supported_formats); i++) {
+        if (ctx->sw_format == supported_formats[i].pix_fmt) {
+            s->format = supported_formats[i].d3d_format;
+            break;
+        }
+    }
+    if (i == FF_ARRAY_ELEMS(supported_formats)) {
+        av_log(ctx, AV_LOG_ERROR, "Unsupported pixel format: %s\n",
+               av_get_pix_fmt_name(ctx->sw_format));
+        return AVERROR(EINVAL);
+    }
+
+    s->surfaces_internal = av_mallocz_array(ctx->initial_pool_size,
+                                            sizeof(*s->surfaces_internal));
+    if (!s->surfaces_internal)
+        return AVERROR(ENOMEM);
+
+    hr = IDirectXVideoAccelerationService_CreateSurface(s->service,
+                                                        ctx->width, ctx->height,
+                                                        ctx->initial_pool_size - 1,
+                                                        s->format, D3DPOOL_DEFAULT, 0,
+                                                        frames_hwctx->surface_type,
+                                                        s->surfaces_internal, NULL);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Could not create the surfaces\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    ctx->internal->pool_internal = av_buffer_pool_init2(sizeof(*s->surfaces_internal),
+                                                        ctx, dxva2_pool_alloc, NULL);
+    if (!ctx->internal->pool_internal)
+        return AVERROR(ENOMEM);
+
+    frames_hwctx->surfaces    = s->surfaces_internal;
+    frames_hwctx->nb_surfaces = ctx->initial_pool_size;
+
+    return 0;
+}
+
+static int dxva2_frames_init(AVHWFramesContext *ctx)
+{
+    AVDXVA2FramesContext *hwctx = ctx->hwctx;
+    DXVA2FramesContext       *s = ctx->internal->priv;
+    int ret;
+
+    if (hwctx->surface_type != DXVA2_VideoDecoderRenderTarget &&
+        hwctx->surface_type != DXVA2_VideoProcessorRenderTarget) {
+        av_log(ctx, AV_LOG_ERROR, "Unknown surface type: %lu\n",
+               hwctx->surface_type);
+        return AVERROR(EINVAL);
+    }
+
+    s->device_handle = INVALID_HANDLE_VALUE;
+
+    /* init the frame pool if the caller didn't provide one */
+    if (!ctx->pool) {
+        ret = dxva2_init_pool(ctx);
+        if (ret < 0) {
+            av_log(ctx, AV_LOG_ERROR, "Error creating an internal frame pool\n");
+            return ret;
+        }
+    }
+
+    return 0;
+}
+
+static int dxva2_get_buffer(AVHWFramesContext *ctx, AVFrame *frame)
+{
+    frame->buf[0] = av_buffer_pool_get(ctx->pool);
+    if (!frame->buf[0])
+        return AVERROR(ENOMEM);
+
+    frame->data[3] = frame->buf[0]->data;
+    frame->format  = AV_PIX_FMT_DXVA2_VLD;
+    frame->width   = ctx->width;
+    frame->height  = ctx->height;
+
+    return 0;
+}
+
+static int dxva2_transfer_get_formats(AVHWFramesContext *ctx,
+                                      enum AVHWFrameTransferDirection dir,
+                                      enum AVPixelFormat **formats)
+{
+    enum AVPixelFormat *fmts;
+
+    fmts = av_malloc_array(2, sizeof(*fmts));
+    if (!fmts)
+        return AVERROR(ENOMEM);
+
+    fmts[0] = ctx->sw_format;
+    fmts[1] = AV_PIX_FMT_NONE;
+
+    *formats = fmts;
+
+    return 0;
+}
+
+static int dxva2_transfer_data(AVHWFramesContext *ctx, AVFrame *dst,
+                               const AVFrame *src)
+{
+    IDirect3DSurface9 *surface;
+    D3DSURFACE_DESC    surfaceDesc;
+    D3DLOCKED_RECT     LockedRect;
+    HRESULT            hr;
+
+    int download = !!src->hw_frames_ctx;
+
+    surface = (IDirect3DSurface9*)(download ? src->data[3] : dst->data[3]);
+
+    hr = IDirect3DSurface9_GetDesc(surface, &surfaceDesc);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Error getting a surface description\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    hr = IDirect3DSurface9_LockRect(surface, &LockedRect, NULL,
+                                    download ? D3DLOCK_READONLY : D3DLOCK_DISCARD);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Unable to lock DXVA2 surface\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    if (download) {
+        av_image_copy_plane(dst->data[0], dst->linesize[0],
+                            (uint8_t*)LockedRect.pBits, LockedRect.Pitch,
+                            src->width, src->height);
+        av_image_copy_plane(dst->data[1], dst->linesize[1],
+                            (uint8_t*)LockedRect.pBits + LockedRect.Pitch * surfaceDesc.Height,
+                            LockedRect.Pitch, src->width, src->height / 2);
+    } else {
+        av_image_copy_plane((uint8_t*)LockedRect.pBits, LockedRect.Pitch,
+                            dst->data[0], dst->linesize[0],
+                            src->width, src->height);
+        av_image_copy_plane((uint8_t*)LockedRect.pBits + LockedRect.Pitch * surfaceDesc.Height,
+                            LockedRect.Pitch, dst->data[1], dst->linesize[1],
+                            src->width, src->height / 2);
+    }
+
+    IDirect3DSurface9_UnlockRect(surface);
+
+    return 0;
+}
+
+const HWContextType ff_hwcontext_type_dxva2 = {
+    .type                 = AV_HWDEVICE_TYPE_DXVA2,
+    .name                 = "DXVA2",
+
+    .device_hwctx_size    = sizeof(AVDXVA2DeviceContext),
+    .frames_hwctx_size    = sizeof(AVDXVA2FramesContext),
+    .frames_priv_size     = sizeof(DXVA2FramesContext),
+
+    .frames_init          = dxva2_frames_init,
+    .frames_uninit        = dxva2_frames_uninit,
+    .frames_get_buffer    = dxva2_get_buffer,
+    .transfer_get_formats = dxva2_transfer_get_formats,
+    .transfer_data_to     = dxva2_transfer_data,
+    .transfer_data_from   = dxva2_transfer_data,
+
+    .pix_fmts             = (const enum AVPixelFormat[]){ AV_PIX_FMT_DXVA2_VLD, AV_PIX_FMT_NONE },
+};