[FFmpeg-devel] [PATCH v4] lavc/qsv: adding DX11 support

Soft Works softworkz at hotmail.com
Sat Mar 7 00:14:48 EET 2020


> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of
> Artem Galin
> Sent: Friday, March 6, 2020 2:10 PM
> To: ffmpeg-devel at ffmpeg.org
> Cc: Artem Galin <artem.galin at gmail.com>
> Subject: [FFmpeg-devel] [PATCH v4] lavc/qsv: adding DX11 support
> 
> This enables DX11 support for QSV with higher priority than DX9.
> In case of multiple GPUs configuration, DX9 API does not allow to get access
> to QSV device in some cases - headless.
> Implementation based on DX11 resolves that restriction by enumerating list
> of available GPUs and finding device with QSV support.
> 
> Signed-off-by: Artem Galin <artem.galin at gmail.com>
> ---
>  fftools/ffmpeg_opt.c          |  12 +-
>  libavcodec/qsv.c              |  53 +++++++-
>  libavcodec/qsv_internal.h     |   2 +
>  libavfilter/qsvvpp.c          |  36 +++--
>  libavutil/hwcontext_d3d11va.c |  56 +++++++-
>  libavutil/hwcontext_qsv.c     | 240 ++++++++++++++++++++++++++++------
>  6 files changed, 340 insertions(+), 59 deletions(-)
> 
> diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c index
> 1b721c4954..da619b0043 100644
> --- a/fftools/ffmpeg_opt.c
> +++ b/fftools/ffmpeg_opt.c
> @@ -504,7 +504,17 @@ static int opt_init_hw_device(void *optctx, const
> char *opt, const char *arg)
>          printf("\n");
>          exit_program(0);
>      } else {
> -        return hw_device_init_from_string(arg, NULL);
> +        HWDevice *dev;
> +        int err;
> +        if (!arg)
> +            return AVERROR(ENOMEM);
> +        err = hw_device_init_from_string(arg, &dev);
> +        if (err < 0)
> +            return err;
> +        hw_device_ctx = av_buffer_ref(dev->device_ref);
> +        if (!hw_device_ctx)
> +            return AVERROR(ENOMEM);
> +        return 0;
>      }
>  }
> 
> diff --git a/libavcodec/qsv.c b/libavcodec/qsv.c index
> db98c75073..beea76896f 100644
> --- a/libavcodec/qsv.c
> +++ b/libavcodec/qsv.c
> @@ -36,6 +36,8 @@
>  #include "avcodec.h"
>  #include "qsv_internal.h"
> 
> +#define MFX_IMPL_VIA_MASK(impl) (0x0f00 & (impl))
> +
>  #if QSV_VERSION_ATLEAST(1, 12)
>  #include "mfx/mfxvp8.h"
>  #endif
> @@ -221,8 +223,13 @@ int ff_qsv_find_surface_idx(QSVFramesContext
> *ctx, QSVFrame *frame)
>      int i;
>      for (i = 0; i < ctx->nb_mids; i++) {
>          QSVMid *mid = &ctx->mids[i];
> +#if CONFIG_D3D11VA
> +        if (mid->handle_pair.second == frame->surface.Data.MemId)
> +            return i;
> +#else
>          if (mid->handle == frame->surface.Data.MemId)
>              return i;
> +#endif
>      }
>      return AVERROR_BUG;
>  }
> @@ -362,7 +369,11 @@ static int
> ff_qsv_set_display_handle(AVCodecContext *avctx, QSVSession *qs)  int
> ff_qsv_init_internal_session(AVCodecContext *avctx, QSVSession *qs,
>                                   const char *load_plugins, int gpu_copy)  {
> +#ifdef AVCODEC_QSV_LINUX_SESSION_HANDLE
>      mfxIMPL          impl = MFX_IMPL_AUTO_ANY;
> +#else
> +    mfxIMPL          impl = MFX_IMPL_AUTO_ANY | MFX_IMPL_VIA_D3D11;
> +#endif
>      mfxVersion        ver = { { QSV_VERSION_MINOR, QSV_VERSION_MAJOR }
> };
>      mfxInitParam init_par = { MFX_IMPL_AUTO_ANY };
> 
> @@ -449,11 +460,21 @@ static AVBufferRef *qsv_create_mids(AVBufferRef
> *hw_frames_ref)
>          return NULL;
>      }
> 
> +#if CONFIG_D3D11VA
> +    for (i = 0; i < nb_surfaces; i++) {
> +        QSVMid *mid = &mids[i];
> +        mid->handle_is_pair     = 1;
> +        mid->handle_pair.first  = (mfxHDL)frames_hwctx-
> >surfaces[i].Data.reserved2;
> +        mid->handle_pair.second = frames_hwctx->surfaces[i].Data.MemId;
> +        mid->hw_frames_ref = hw_frames_ref1;
> +    }
> +#else
>      for (i = 0; i < nb_surfaces; i++) {
>          QSVMid *mid = &mids[i];
>          mid->handle        = frames_hwctx->surfaces[i].Data.MemId;
>          mid->hw_frames_ref = hw_frames_ref1;
>      }
> +#endif
> 
>      return mids_buf;
>  }
> @@ -661,7 +682,12 @@ static mfxStatus qsv_frame_unlock(mfxHDL pthis,
> mfxMemId mid, mfxFrameData *ptr)  static mfxStatus
> qsv_frame_get_hdl(mfxHDL pthis, mfxMemId mid, mfxHDL *hdl)  {
>      QSVMid *qsv_mid = (QSVMid*)mid;
> -    *hdl = qsv_mid->handle;
> +    if (qsv_mid->handle_is_pair) {
> +        mfxHDLPair *hdlpair = (mfxHDLPair*)hdl;
> +        *hdlpair = qsv_mid->handle_pair;
> +    } else {
> +        *hdl = qsv_mid->handle;
> +    }
>      return MFX_ERR_NONE;
>  }
> 
> @@ -679,11 +705,11 @@ int ff_qsv_init_session_device(AVCodecContext
> *avctx, mfxSession *psession,
>      mfxSession        parent_session = device_hwctx->session;
>      mfxInitParam            init_par = { MFX_IMPL_AUTO_ANY };
>      mfxHDL                    handle = NULL;
> +    mfxHandleType        handle_type = MFX_HANDLE_D3D11_DEVICE;
> 
>      mfxSession    session;
>      mfxVersion    ver;
>      mfxIMPL       impl;
> -    mfxHandleType handle_type;
>      mfxStatus err;
> 
>      int i, ret;
> @@ -695,11 +721,26 @@ int ff_qsv_init_session_device(AVCodecContext
> *avctx, mfxSession *psession,
>          return ff_qsv_print_error(avctx, err,
>                                    "Error querying the session attributes");
> 
> +    if (MFX_IMPL_VIA_D3D11 == MFX_IMPL_VIA_MASK(impl))
> +    {
> +        handle_type = MFX_HANDLE_D3D11_DEVICE;
> +    }
> +    else if (MFX_IMPL_VIA_D3D9 == MFX_IMPL_VIA_MASK(impl))
> +    {
> +        handle_type = MFX_HANDLE_D3D9_DEVICE_MANAGER;
> +    }
> +    else if (MFX_IMPL_VIA_VAAPI == MFX_IMPL_VIA_MASK(impl))
> +    {
> +        handle_type = MFX_HANDLE_VA_DISPLAY;
> +    }
> +
>      for (i = 0; i < FF_ARRAY_ELEMS(handle_types); i++) {
> -        err = MFXVideoCORE_GetHandle(parent_session, handle_types[i],
> &handle);
> -        if (err == MFX_ERR_NONE) {
> -            handle_type = handle_types[i];
> -            break;
> +        if (handle_types[i] == handle_type)
> +        {
> +            err = MFXVideoCORE_GetHandle(parent_session, handle_types[i],
> &handle);
> +            if (err == MFX_ERR_NONE) {
> +                break;
> +            }
>          }
>          handle = NULL;
>      }
> diff --git a/libavcodec/qsv_internal.h b/libavcodec/qsv_internal.h index
> 6489836a67..99dfa8dcff 100644
> --- a/libavcodec/qsv_internal.h
> +++ b/libavcodec/qsv_internal.h
> @@ -60,7 +60,9 @@
> 
>  typedef struct QSVMid {
>      AVBufferRef *hw_frames_ref;
> +    int handle_is_pair;
>      mfxHDL handle;
> +    mfxHDLPair handle_pair;
> 
>      AVFrame *locked_frame;
>      AVFrame *hw_frame;
> diff --git a/libavfilter/qsvvpp.c b/libavfilter/qsvvpp.c index
> 8d5ff2eb65..306bb2e0c3 100644
> --- a/libavfilter/qsvvpp.c
> +++ b/libavfilter/qsvvpp.c
> @@ -32,10 +32,11 @@
>  #include "qsvvpp.h"
>  #include "video.h"
> 
> -#define IS_VIDEO_MEMORY(mode)  (mode &
> (MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET | \
> +#define IS_VIDEO_MEMORY(mode)   (mode &
> (MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET | \
> 
> MFX_MEMTYPE_VIDEO_MEMORY_PROCESSOR_TARGET))
> -#define IS_OPAQUE_MEMORY(mode) (mode &
> MFX_MEMTYPE_OPAQUE_FRAME) -#define IS_SYSTEM_MEMORY(mode)
> (mode & MFX_MEMTYPE_SYSTEM_MEMORY)
> +#define IS_OPAQUE_MEMORY(mode)  (mode &
> MFX_MEMTYPE_OPAQUE_FRAME)
> +#define IS_SYSTEM_MEMORY(mode)  (mode &
> MFX_MEMTYPE_SYSTEM_MEMORY)
> +#define MFX_IMPL_VIA_MASK(impl) (0x0f00 & (impl))
> 
>  typedef struct QSVFrame {
>      AVFrame          *frame;
> @@ -405,12 +406,12 @@ static int init_vpp_session(AVFilterContext *avctx,
> QSVVPPContext *s)
>      AVFilterLink                *outlink = avctx->outputs[0];
>      AVQSVFramesContext  *in_frames_hwctx = NULL;
>      AVQSVFramesContext *out_frames_hwctx = NULL;
> +    mfxHandleType            handle_type = MFX_HANDLE_D3D11_DEVICE;
> 
>      AVBufferRef *device_ref;
>      AVHWDeviceContext *device_ctx;
>      AVQSVDeviceContext *device_hwctx;
>      mfxHDL handle;
> -    mfxHandleType handle_type;
>      mfxVersion ver;
>      mfxIMPL impl;
>      int ret, i;
> @@ -497,15 +498,30 @@ static int init_vpp_session(AVFilterContext *avctx,
> QSVVPPContext *s)
>          return AVERROR_UNKNOWN;
>      }
> 
> +    if (MFX_IMPL_VIA_D3D11 == MFX_IMPL_VIA_MASK(impl))
> +    {
> +        handle_type = MFX_HANDLE_D3D11_DEVICE;
> +    }
> +    else if (MFX_IMPL_VIA_D3D9 == MFX_IMPL_VIA_MASK(impl))
> +    {
> +        handle_type = MFX_HANDLE_D3D9_DEVICE_MANAGER;
> +    }
> +    else if (MFX_IMPL_VIA_VAAPI == MFX_IMPL_VIA_MASK(impl))
> +    {
> +        handle_type = MFX_HANDLE_VA_DISPLAY;
> +    }
> +
>      for (i = 0; i < FF_ARRAY_ELEMS(handle_types); i++) {
> -        ret = MFXVideoCORE_GetHandle(device_hwctx->session,
> handle_types[i], &handle);
> -        if (ret == MFX_ERR_NONE) {
> -            handle_type = handle_types[i];
> -            break;
> +        if (handle_types[i] == handle_type)
> +        {
> +            ret = MFXVideoCORE_GetHandle(device_hwctx->session,
> handle_types[i], &handle);
> +            if (ret == MFX_ERR_NONE) {
> +                break;
> +            }
>          }
> +        handle = NULL;
>      }
> -
> -    if (ret != MFX_ERR_NONE) {
> +    if (!handle) {
>          av_log(avctx, AV_LOG_ERROR, "Error getting the session handle\n");
>          return AVERROR_UNKNOWN;
>      }
> diff --git a/libavutil/hwcontext_d3d11va.c b/libavutil/hwcontext_d3d11va.c
> index c8ae58f908..13279b7e6f 100644
> --- a/libavutil/e.c
> +++ b/libavutil/hwcontext_d3d11va.c
> @@ -511,15 +511,57 @@ static void
> d3d11va_device_uninit(AVHWDeviceContext *hwdev)
>      }
>  }
> 
> +static int
> d3d11va_device_find_adapter_by_vendor_id(AVHWDeviceContext
> +*ctx, UINT creationFlags, char *vendor) {
> +    HRESULT hr;
> +    IDXGIAdapter *adapter = NULL;
> +    int adapter_id = 0;
> +    IDXGIFactory2 *factory;
> +    long int vendor_id = strtol(vendor, NULL, 0);
> +    hr = mCreateDXGIFactory(&IID_IDXGIFactory2, (void **)&factory);
> +    while (IDXGIFactory2_EnumAdapters(factory, adapter_id++, &adapter)
> != DXGI_ERROR_NOT_FOUND)
> +    {
> +        ID3D11Device* device = NULL;
> +        DXGI_ADAPTER_DESC adapter_desc;
> +
> +        hr = mD3D11CreateDevice(adapter, D3D_DRIVER_TYPE_UNKNOWN,
> NULL, creationFlags, NULL, 0, D3D11_SDK_VERSION, &device, NULL, NULL);
> +        if (FAILED(hr)) {
> +            av_log(ctx, AV_LOG_ERROR, "D3D11CreateDevice returned error\n");
> +            continue;
> +        }
> +
> +        hr = IDXGIAdapter2_GetDesc(adapter, &adapter_desc);
> +        if (FAILED(hr)) {
> +            av_log(ctx, AV_LOG_ERROR, "IDXGIAdapter2_GetDesc returned
> error\n");
> +            continue;
> +        }
> +
> +        if (device)
> +            ID3D11Device_Release(device);
> +
> +        if (adapter)
> +            IDXGIAdapter_Release(adapter);
> +
> +        if (adapter_desc.VendorId == vendor_id) {
> +            IDXGIFactory2_Release(factory);
> +            return adapter_id - 1;
> +        }
> +    }
> +    IDXGIFactory2_Release(factory);
> +    return -1;
> +}
> +
>  static int d3d11va_device_create(AVHWDeviceContext *ctx, const char
> *device,
>                                   AVDictionary *opts, int flags)  {
>      AVD3D11VADeviceContext *device_hwctx = ctx->hwctx;
> 
>      HRESULT hr;
> +    AVDictionaryEntry *e;
>      IDXGIAdapter           *pAdapter = NULL;
>      ID3D10Multithread      *pMultithread;
>      UINT creationFlags = D3D11_CREATE_DEVICE_VIDEO_SUPPORT;
> +    int adapter = -1;
>      int is_debug       = !!av_dict_get(opts, "debug", NULL, 0);
>      int ret;
> 
> @@ -539,11 +581,23 @@ static int
> d3d11va_device_create(AVHWDeviceContext *ctx, const char *device,
>          return AVERROR_UNKNOWN;
>      }
> 
> +    e = av_dict_get(opts, "vendor", NULL, 0);
> +    if (e) {
> +        adapter = d3d11va_device_find_adapter_by_vendor_id(ctx,
> creationFlags, e ? e->value : NULL);
> +        if (adapter < 0) {
> +            av_log(ctx, AV_LOG_ERROR, "Failed to find d3d11va adapter by
> vendor id %s\n", e ? e->value : NULL);
> +            return AVERROR_UNKNOWN;
> +        }
> +    }
> +
>      if (device) {
> +        adapter = atoi(device);
> +    }
> +
> +    if (adapter >= 0) {
>          IDXGIFactory2 *pDXGIFactory;
>          hr = mCreateDXGIFactory(&IID_IDXGIFactory2, (void
> **)&pDXGIFactory);
>          if (SUCCEEDED(hr)) {
> -            int adapter = atoi(device);
>              if (FAILED(IDXGIFactory2_EnumAdapters(pDXGIFactory, adapter,
> &pAdapter)))
>                  pAdapter = NULL;
>              IDXGIFactory2_Release(pDXGIFactory);
> diff --git a/libavutil/hwcontext_qsv.c b/libavutil/hwcontext_qsv.c index
> b1b67400de..97a18088c0 100644
> --- a/libavutil/hwcontext_qsv.c
> +++ b/libavutil/hwcontext_qsv.c
> @@ -27,9 +27,13 @@
>  #include <pthread.h>
>  #endif
> 
> +#define COBJMACROS
>  #if CONFIG_VAAPI
>  #include "hwcontext_vaapi.h"
>  #endif
> +#if CONFIG_D3D11VA
> +#include "hwcontext_d3d11va.h"
> +#endif
>  #if CONFIG_DXVA2
>  #include "hwcontext_dxva2.h"
>  #endif
> @@ -44,6 +48,8 @@
>  #include "pixdesc.h"
>  #include "time.h"
> 
> +#define MFX_IMPL_VIA_MASK(impl) (0x0f00 & (impl))
> +
>  typedef struct QSVDevicePriv {
>      AVBufferRef *child_device_ctx;
>  } QSVDevicePriv;
> @@ -89,6 +95,9 @@ static const struct {
>  #if CONFIG_VAAPI
>      { MFX_HANDLE_VA_DISPLAY,          AV_HWDEVICE_TYPE_VAAPI,
> AV_PIX_FMT_VAAPI },
>  #endif
> +#if CONFIG_D3D11VA
> +    { MFX_HANDLE_D3D11_DEVICE,        AV_HWDEVICE_TYPE_D3D11VA,
> AV_PIX_FMT_D3D11 },
> +#endif
>  #if CONFIG_DXVA2
>      { MFX_HANDLE_D3D9_DEVICE_MANAGER, AV_HWDEVICE_TYPE_DXVA2,
> AV_PIX_FMT_DXVA2_VLD },  #endif @@ -119,25 +128,11 @@ static int
> qsv_device_init(AVHWDeviceContext *ctx)  {
>      AVQSVDeviceContext *hwctx = ctx->hwctx;
>      QSVDeviceContext       *s = ctx->internal->priv;
> +    mfxHandleType handle_type = MFX_HANDLE_D3D11_DEVICE;
> 
>      mfxStatus err;
>      int i;
> 
> -    for (i = 0; supported_handle_types[i].handle_type; i++) {
> -        err = MFXVideoCORE_GetHandle(hwctx->session,
> supported_handle_types[i].handle_type,
> -                                     &s->handle);
> -        if (err == MFX_ERR_NONE) {
> -            s->handle_type       = supported_handle_types[i].handle_type;
> -            s->child_device_type = supported_handle_types[i].device_type;
> -            s->child_pix_fmt     = supported_handle_types[i].pix_fmt;
> -            break;
> -        }
> -    }
> -    if (!s->handle) {
> -        av_log(ctx, AV_LOG_VERBOSE, "No supported hw handle could be
> retrieved "
> -               "from the session\n");
> -    }
> -
>      err = MFXQueryIMPL(hwctx->session, &s->impl);
>      if (err == MFX_ERR_NONE)
>          err = MFXQueryVersion(hwctx->session, &s->ver); @@ -146,6 +141,36
> @@ static int qsv_device_init(AVHWDeviceContext *ctx)
>          return AVERROR_UNKNOWN;
>      }
> 
> +    if (MFX_IMPL_VIA_D3D11 == MFX_IMPL_VIA_MASK(s->impl))
> +    {
> +        handle_type = MFX_HANDLE_D3D11_DEVICE;
> +    }
> +    else if (MFX_IMPL_VIA_D3D9 == MFX_IMPL_VIA_MASK(s->impl))
> +    {
> +        handle_type = MFX_HANDLE_D3D9_DEVICE_MANAGER;
> +    }
> +    else if (MFX_IMPL_VIA_VAAPI == MFX_IMPL_VIA_MASK(s->impl))
> +    {
> +        handle_type = MFX_HANDLE_VA_DISPLAY;
> +    }
> +
> +    for (i = 0; supported_handle_types[i].handle_type; i++) {
> +        if (supported_handle_types[i].handle_type == handle_type) {
> +            err = MFXVideoCORE_GetHandle(hwctx->session,
> supported_handle_types[i].handle_type,
> +                                        &s->handle);
> +            if (err == MFX_ERR_NONE) {
> +                s->handle_type       = supported_handle_types[i].handle_type;
> +                s->child_device_type = supported_handle_types[i].device_type;
> +                s->child_pix_fmt     = supported_handle_types[i].pix_fmt;
> +                break;
> +            }
> +        }
> +    }
> +    if (!s->handle) {
> +        av_log(ctx, AV_LOG_VERBOSE, "No supported hw handle could be
> retrieved "
> +               "from the session\n");
> +    }
> +
>      return 0;
>  }
> 
> @@ -229,6 +254,13 @@ static int qsv_init_child_ctx(AVHWFramesContext
> *ctx)
>          child_device_hwctx->display = (VADisplay)device_priv->handle;
>      }
>  #endif
> +#if CONFIG_D3D11VA
> +    if (child_device_ctx->type == AV_HWDEVICE_TYPE_D3D11VA) {
> +        AVD3D11VADeviceContext *child_device_hwctx = child_device_ctx-
> >hwctx;
> +        ID3D11Device_AddRef((ID3D11Device*)device_priv->handle);
> +        child_device_hwctx->device = (ID3D11Device*)device_priv->handle;
> +    }
> +#endif
>  #if CONFIG_DXVA2
>      if (child_device_ctx->type == AV_HWDEVICE_TYPE_DXVA2) {
>          AVDXVA2DeviceContext *child_device_hwctx = child_device_ctx-
> >hwctx; @@ -255,6 +287,16 @@ static int
> qsv_init_child_ctx(AVHWFramesContext *ctx)
>      child_frames_ctx->width             = FFALIGN(ctx->width, 16);
>      child_frames_ctx->height            = FFALIGN(ctx->height, 16);
> 
> +#if CONFIG_D3D11VA
> +    if (child_device_ctx->type == AV_HWDEVICE_TYPE_D3D11VA) {
> +        AVD3D11VAFramesContext *child_frames_hwctx = child_frames_ctx-
> >hwctx;
> +        child_frames_hwctx->MiscFlags |= D3D11_RESOURCE_MISC_SHARED;
> +        if (hwctx->frame_type &
> MFX_MEMTYPE_VIDEO_MEMORY_PROCESSOR_TARGET)
> +            child_frames_hwctx->BindFlags = D3D11_BIND_RENDER_TARGET ;
> +        else
> +            child_frames_hwctx->BindFlags = D3D11_BIND_DECODER;
> +    }
> +#endif
>  #if CONFIG_DXVA2
>      if (child_device_ctx->type == AV_HWDEVICE_TYPE_DXVA2) {
>          AVDXVA2FramesContext *child_frames_hwctx = child_frames_ctx-
> >hwctx; @@ -279,6 +321,19 @@ static int
> qsv_init_child_ctx(AVHWFramesContext *ctx)
>          hwctx->frame_type =
> MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
>      }
>  #endif
> +#if CONFIG_D3D11VA
> +    if (child_device_ctx->type == AV_HWDEVICE_TYPE_D3D11VA) {
> +        AVD3D11VAFramesContext *child_frames_hwctx = child_frames_ctx-
> >hwctx;
> +        for (i = 0; i < ctx->initial_pool_size; i++) {
> +            s->surfaces_internal[i].Data.MemId = (mfxMemId)(intptr_t)i;
> +            s->surfaces_internal[i].Data.reserved2 =
> (intptr_t)child_frames_hwctx->texture;
> +        }
> +        if (child_frames_hwctx->BindFlags & D3D11_BIND_DECODER)
> +            hwctx->frame_type =
> MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
> +        else
> +            hwctx->frame_type =
> MFX_MEMTYPE_VIDEO_MEMORY_PROCESSOR_TARGET;
> +    }
> +#endif
>  #if CONFIG_DXVA2
>      if (child_device_ctx->type == AV_HWDEVICE_TYPE_DXVA2) {
>          AVDXVA2FramesContext *child_frames_hwctx = child_frames_ctx-
> >hwctx; @@ -421,6 +476,19 @@ static mfxStatus frame_unlock(mfxHDL
> pthis, mfxMemId mid, mfxFrameData *ptr)
> 
>  static mfxStatus frame_get_hdl(mfxHDL pthis, mfxMemId mid, mfxHDL
> *hdl)  {
> +#if CONFIG_D3D11VA
> +    AVHWFramesContext *ctx = pthis;
> +    QSVFramesContext    *s = ctx->internal->priv;
> +    AVHWFramesContext *child_ctx =
> +        (AVHWFramesContext*)s->child_frames_ref->data;
> +    if (child_ctx->format == AV_PIX_FMT_D3D11) {
> +        AVD3D11VAFramesContext *child_hwctx = child_ctx->hwctx;
> +        mfxHDLPair *hdlpair = (mfxHDLPair*)hdl;
> +        hdlpair->first  = child_hwctx->texture;
> +        hdlpair->second = mid; // (Texture array index.)
> +        return MFX_ERR_NONE;
> +    }
> +#endif
>      *hdl = mid;
>      return MFX_ERR_NONE;
>  }
> @@ -668,6 +736,11 @@ static int qsv_map_from(AVHWFramesContext *ctx,
>          child_data = (uint8_t*)(intptr_t)*(VASurfaceID*)surf->Data.MemId;
>          break;
>  #endif
> +#if CONFIG_D3D11VA
> +    case AV_HWDEVICE_TYPE_D3D11VA:
> +        child_data = surf->Data.MemId;
> +        break;
> +#endif
>  #if CONFIG_DXVA2
>      case AV_HWDEVICE_TYPE_DXVA2:
>          child_data = surf->Data.MemId;
> @@ -954,6 +1027,12 @@ static int
> qsv_frames_derive_to(AVHWFramesContext *dst_ctx,
>      AVQSVFramesContext *dst_hwctx = dst_ctx->hwctx;
>      int i;
> 
> +    if (src_ctx->initial_pool_size == 0) {
> +        av_log(dst_ctx, AV_LOG_ERROR, "Only fixed-size pools can be "
> +            "mapped to QSV frames.\n");
> +        return AVERROR(EINVAL);
> +    }
> +
>      switch (src_ctx->device_ctx->type) {  #if CONFIG_VAAPI
>      case AV_HWDEVICE_TYPE_VAAPI:
> @@ -972,6 +1051,27 @@ static int
> qsv_frames_derive_to(AVHWFramesContext *dst_ctx,
>          }
>          break;
>  #endif
> +#if CONFIG_D3D11VA
> +    case AV_HWDEVICE_TYPE_D3D11VA:
> +        {
> +            AVD3D11VAFramesContext *src_hwctx = src_ctx->hwctx;
> +            s->surfaces_internal = av_mallocz_array(src_ctx->initial_pool_size,
> +                                                    sizeof(*s->surfaces_internal));
> +            if (!s->surfaces_internal)
> +                return AVERROR(ENOMEM);
> +            for (i = 0; i < src_ctx->initial_pool_size; i++) {
> +                qsv_init_surface(dst_ctx, &s->surfaces_internal[i]);
> +                s->surfaces_internal[i].Data.MemId = (mfxMemId)(intptr_t)i;
> +                s->surfaces_internal[i].Data.reserved2 = (intptr_t)src_hwctx-
> >texture;
> +            }
> +            dst_hwctx->nb_surfaces = src_ctx->initial_pool_size;
> +            if (src_hwctx->BindFlags & D3D11_BIND_DECODER)
> +                dst_hwctx->frame_type =
> MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
> +            else
> +                dst_hwctx->frame_type =
> MFX_MEMTYPE_VIDEO_MEMORY_PROCESSOR_TARGET;
> +        }
> +        break;
> +#endif
>  #if CONFIG_DXVA2
>      case AV_HWDEVICE_TYPE_DXVA2:
>          {
> @@ -1005,21 +1105,33 @@ static int qsv_map_to(AVHWFramesContext
> *dst_ctx,
>                        AVFrame *dst, const AVFrame *src, int flags)  {
>      AVQSVFramesContext *hwctx = dst_ctx->hwctx;
> -    int i, err;
> +    int i, err, index = -1;
> 
> -    for (i = 0; i < hwctx->nb_surfaces; i++) {
> +    for (i = 0; i < hwctx->nb_surfaces && index < 0; i++) {
>  #if CONFIG_VAAPI
> -        if (*(VASurfaceID*)hwctx->surfaces[i].Data.MemId ==
> -            (VASurfaceID)(uintptr_t)src->data[3])
> +        if (AV_PIX_FMT_VAAPI == src->format) {
> +            if (*(VASurfaceID*)hwctx->surfaces[i].Data.MemId ==
> +                (VASurfaceID)(uintptr_t)src->data[3])
> +                index = i
>              break;
> +        }
>  #endif
> -#if CONFIG_DXVA2
> -        if ((IDirect3DSurface9*)hwctx->surfaces[i].Data.MemId ==
> -            (IDirect3DSurface9*)(uintptr_t)src->data[3])
> +#if CONFIG_D3D11VA
> +        if (AV_PIX_FMT_D3D11 == src->format) {
> +            if (i == (intptr_t)src->data[1])
> +                index = i;
>              break;
> +        }
> +#endif
> +#if CONFIG_DXVA2
> +        if (AV_PIX_FMT_DXVA2_VLD == src->format) {
> +            if ((IDirect3DSurface9*)hwctx->surfaces[i].Data.MemId ==
> +                (IDirect3DSurface9*)(uintptr_t)src->data[3])
> +                index = i;
> +        }
>  #endif
>      }
> -    if (i >= hwctx->nb_surfaces) {
> +    if (index < 0) {
>          av_log(dst_ctx, AV_LOG_ERROR, "Trying to map from a surface which "
>                 "is not in the mapped frames context.\n");
>          return AVERROR(EINVAL);
> @@ -1032,7 +1144,7 @@ static int qsv_map_to(AVHWFramesContext
> *dst_ctx,
> 
>      dst->width   = src->width;
>      dst->height  = src->height;
> -    dst->data[3] = (uint8_t*)&hwctx->surfaces[i];
> +    dst->data[3] = (uint8_t*)&hwctx->surfaces[index];
> 
>      return 0;
>  }
> @@ -1074,7 +1186,7 @@ static void qsv_device_free(AVHWDeviceContext
> *ctx)
>      av_freep(&priv);
>  }
> 
> -static mfxIMPL choose_implementation(const char *device)
> +static mfxIMPL choose_implementation(const char *device, enum
> +AVHWDeviceType child_device_type)
>  {
>      static const struct {
>          const char *name;
> @@ -1103,6 +1215,10 @@ static mfxIMPL choose_implementation(const
> char *device)
>              impl = strtol(device, NULL, 0);
>      }
> 
> +    if ( (child_device_type == AV_HWDEVICE_TYPE_D3D11VA) && (impl !=
> MFX_IMPL_SOFTWARE) ) {
> +        impl |= MFX_IMPL_VIA_D3D11;
> +    }
> +
>      return impl;
>  }
> 
> @@ -1129,6 +1245,15 @@ static int
> qsv_device_derive_from_child(AVHWDeviceContext *ctx,
>          }
>          break;
>  #endif
> +#if CONFIG_D3D11VA
> +    case AV_HWDEVICE_TYPE_D3D11VA:
> +        {
> +            AVD3D11VADeviceContext *child_device_hwctx = child_device_ctx-
> >hwctx;
> +            handle_type = MFX_HANDLE_D3D11_DEVICE;
> +            handle = (mfxHDL)child_device_hwctx->device;
> +        }
> +        break;
> +#endif
>  #if CONFIG_DXVA2
>      case AV_HWDEVICE_TYPE_DXVA2:
>          {
> @@ -1191,7 +1316,9 @@ fail:
>  static int qsv_device_derive(AVHWDeviceContext *ctx,
>                               AVHWDeviceContext *child_device_ctx, int flags)  {
> -    return qsv_device_derive_from_child(ctx, MFX_IMPL_HARDWARE_ANY,
> +    mfxIMPL impl;
> +    impl = choose_implementation("hw_any", child_device_ctx->type);
> +    return qsv_device_derive_from_child(ctx, impl,
>                                          child_device_ctx, flags);  }
> 
> @@ -1214,35 +1341,66 @@ static int
> qsv_device_create(AVHWDeviceContext *ctx, const char *device,
>      ctx->user_opaque = priv;
>      ctx->free        = qsv_device_free;
> 
> -    e = av_dict_get(opts, "child_device", NULL, 0);
> -
> -    child_device_opts = NULL;
> -    if (CONFIG_VAAPI) {
> +    e = av_dict_get(opts, "child_device_type", NULL, 0);
> +    if (e) {
> +        child_device_type = av_hwdevice_find_type_by_name(e ? e->value :
> NULL);
> +        if (child_device_type == AV_HWDEVICE_TYPE_NONE) {
> +            av_log(ctx, AV_LOG_ERROR, "Unknown child device type "
> +                   "\"%s\".\n", e ? e->value : NULL);
> +            return AVERROR(EINVAL);
> +        }
> +    } else if (CONFIG_VAAPI) {
>          child_device_type = AV_HWDEVICE_TYPE_VAAPI;
> -        // libmfx does not actually implement VAAPI properly, rather it
> -        // depends on the specific behaviour of a matching iHD driver when
> -        // used on recent Intel hardware.  Set options to the VAAPI device
> -        // creation so that we should pick a usable setup by default if
> -        // possible, even when multiple devices and drivers are available.
> -        av_dict_set(&child_device_opts, "kernel_driver", "i915", 0);
> -        av_dict_set(&child_device_opts, "driver",        "iHD",  0);
> -    } else if (CONFIG_DXVA2)
> +    } else if (CONFIG_D3D11VA) {
> +        child_device_type = AV_HWDEVICE_TYPE_D3D11VA;
> +    } else if (CONFIG_DXVA2) {
>          child_device_type = AV_HWDEVICE_TYPE_DXVA2;
> -    else {
> +    } else {
>          av_log(ctx, AV_LOG_ERROR, "No supported child device type is
> enabled\n");
>          return AVERROR(ENOSYS);
>      }
> 
> +    child_device_opts = NULL;
> +    switch (child_device_type) {
> +#if CONFIG_VAAPI
> +    case AV_HWDEVICE_TYPE_VAAPI:
> +        {
> +            // libmfx does not actually implement VAAPI properly, rather it
> +            // depends on the specific behaviour of a matching iHD driver when
> +            // used on recent Intel hardware.  Set options to the VAAPI device
> +            // creation so that we should pick a usable setup by default if
> +            // possible, even when multiple devices and drivers are available.
> +            av_dict_set(&child_device_opts, "kernel_driver", "i915", 0);
> +            av_dict_set(&child_device_opts, "driver",        "iHD",  0);
> +        }
> +        break;
> +#endif
> +#if CONFIG_D3D11VA
> +    case AV_HWDEVICE_TYPE_D3D11VA:
> +        break;
> +#endif
> +#if CONFIG_DXVA2
> +    case AV_HWDEVICE_TYPE_DXVA2:
> +        break;
> +#endif
> +    default:
> +        {
> +            av_log(ctx, AV_LOG_ERROR, "No supported child device type is
> enabled\n");
> +            return AVERROR(ENOSYS);
> +        }
> +        break;
> +    }
> +
> +    e = av_dict_get(opts, "child_device", NULL, 0);
>      ret = av_hwdevice_ctx_create(&priv->child_device_ctx,
> child_device_type,
>                                   e ? e->value : NULL, child_device_opts, 0);
> -
>      av_dict_free(&child_device_opts);
>      if (ret < 0)
>          return ret;
> 
>      child_device = (AVHWDeviceContext*)priv->child_device_ctx->data;
> 
> -    impl = choose_implementation(device);
> +    impl = choose_implementation(device, child_device_type);
> 
>      return qsv_device_derive_from_child(ctx, impl, child_device, 0);  }
> --
> 2.21.0


This appears to be a bit half-baked. What's missing imo is:

- Allow selection of a specific DXGI adapter
- Change filters to support mfxHandlePair
- Allow deriving from D3D11VA hw context

Also, have you tested all possible use cases:

- Setting up standalone hw decoder (no hw encoder)
- Setting up standalone hw encoder (no hw decoder)
- Filter-only hw device context

Further, I think there should be an explicit selection between D3D9 
and D3D11 instead of an automatic selection.

softworkz


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