[FFmpeg-devel] [PATCH] hw_base_encode: refactor picture allocation/freeing

Lynne dev at lynne.ee
Mon Aug 19 18:16:59 EEST 2024


On 19/08/2024 17:07, Tong Wu wrote:
> Lynne:
>> Subject: [PATCH] hw_base_encode: refactor picture allocation/freeing
>>
>> This commit cleans up and refactors the mess of private state upon private state
>> that used to be.
>>
>> Now, FFHWBaseEncodePicture is fully initialized upon call-time, and, most
>> importantly, this lets APIs which require initialization data for frames
>> (VkImageViews) to initialize this for both the input image, and the reconstruction
>> (DPB) image.
>> ---
>> libavcodec/d3d12va_encode.c     | 24 +++++-------
>> libavcodec/hw_base_encode.c     | 33 ++++++++++-------
>> libavcodec/hw_base_encode.h     | 21 ++++++-----
>> libavcodec/vaapi_encode.c       | 66 ++++++++++++++-------------------
>> libavcodec/vaapi_encode.h       |  4 +-
>> libavcodec/vaapi_encode_av1.c   | 20 +++++-----
>> libavcodec/vaapi_encode_h264.c  | 42 ++++++++++-----------
>> libavcodec/vaapi_encode_h265.c  | 20 +++++-----
>> libavcodec/vaapi_encode_mjpeg.c |  7 ++--  libavcodec/vaapi_encode_mpeg2.c |
>> 7 ++--
>> libavcodec/vaapi_encode_vp8.c   |  4 +-
>> libavcodec/vaapi_encode_vp9.c   | 14 +++----
>> 12 files changed, 128 insertions(+), 134 deletions(-)
>>
>> diff --git a/libavcodec/d3d12va_encode.c b/libavcodec/d3d12va_encode.c index
>> 9ee9da41e3..681044c5c8 100644
>> --- a/libavcodec/d3d12va_encode.c
>> +++ b/libavcodec/d3d12va_encode.c
>> @@ -186,7 +186,7 @@ static int
>> d3d12va_encode_create_metadata_buffers(AVCodecContext *avctx,  }
>>
>> static int d3d12va_encode_issue(AVCodecContext *avctx,
>> -                                const FFHWBaseEncodePicture *base_pic)
>> +                                FFHWBaseEncodePicture *base_pic)
>> {
>>      FFHWBaseEncodeContext *base_ctx = avctx->priv_data;
>>      D3D12VAEncodeContext       *ctx = avctx->priv_data;
>> @@ -560,27 +560,20 @@ static int
>> d3d12va_encode_free_rc_params(AVCodecContext *avctx)
>>      return 0;
>> }
>>
>> -static FFHWBaseEncodePicture *d3d12va_encode_alloc(AVCodecContext *avctx,
>> -                                                   const AVFrame *frame)
>> +static int d3d12va_encode_init(AVCodecContext *avctx,
>> +FFHWBaseEncodePicture *base)
> 
> The function name might be confusing since ff_d3d12va_encode_init is already  there.
> 
>> {
>>      D3D12VAEncodeContext *ctx = avctx->priv_data;
>> -    D3D12VAEncodePicture *pic;
>> -
>> -    pic = av_mallocz(sizeof(*pic));
>> -    if (!pic)
>> -        return NULL;
>> +    D3D12VAEncodePicture *pic = base->priv;
> 
> base->priv is never initialized
> 
>>
>>      if (ctx->codec->picture_priv_data_size > 0) {
>> -        pic->base.priv_data = av_mallocz(ctx->codec->picture_priv_data_size);
>> -        if (!pic->base.priv_data) {
>> -            av_freep(&pic);
>> -            return NULL;
>> -        }
>> +        pic->base.codec_priv = av_mallocz(ctx->codec->picture_priv_data_size);
>> +        if (!pic->base.codec_priv)
>> +            return AVERROR(ENOMEM);
>>      }
>>
>>      pic->input_surface = (AVD3D12VAFrame *)frame->data[0];
>>
>> -    return &pic->base;
>> +    return 0;
>> }
>>
>> static int d3d12va_encode_free(AVCodecContext *avctx, @@ -680,7 +673,7 @@
>> end:
>> }
>>
>> static int d3d12va_encode_output(AVCodecContext *avctx,
>> -                                 const FFHWBaseEncodePicture *base_pic, AVPacket *pkt)
>> +                                 FFHWBaseEncodePicture *base_pic,
>> + AVPacket *pkt)
>> {
> 
> Mark was suggesting to add the const to the callback. Any reason to remove it?
> 
>>      FFHWBaseEncodeContext *base_ctx = avctx->priv_data;
>>      D3D12VAEncodePicture *pic = (D3D12VAEncodePicture *)base_pic; @@ -
>> 1389,6 +1382,7 @@ static int
>> d3d12va_encode_create_recon_frames(AVCodecContext *avctx)  }
>>
>> static const FFHWEncodePictureOperation d3d12va_type = {
>> +    .priv_size = sizeof(D3D12VAEncodePicture),
>>      .alloc  = &d3d12va_encode_alloc,
> 
> .alloc no longer exists
> 
>>
>>      .issue  = &d3d12va_encode_issue,
>> diff --git a/libavcodec/hw_base_encode.c b/libavcodec/hw_base_encode.c index
>> c1346e866c..60d862f1b6 100644
>> --- a/libavcodec/hw_base_encode.c
>> +++ b/libavcodec/hw_base_encode.c
>> @@ -27,6 +27,19 @@
>> #include "avcodec.h"
>> #include "hw_base_encode.h"
>>
>> +static int base_encode_pic_free(FFHWBaseEncodePicture *pic) {
>> +    av_frame_free(&pic->input_image);
>> +    av_frame_free(&pic->recon_image);
>> +
>> +    av_buffer_unref(&pic->opaque_ref);
>> +    av_freep(&pic->codec_priv);
>> +    av_freep(&pic->priv);
>> +    av_free(pic);
>> +
>> +    return 0;
>> +}
>> +
>> static void hw_base_encode_add_ref(FFHWBaseEncodePicture *pic,
>>                                     FFHWBaseEncodePicture *target,
>>                                     int is_ref, int in_dpb, int prev) @@ -370,6 +383,7 @@ static
>> int hw_base_encode_clear_old(AVCodecContext *avctx,
>> FFHWBaseEncodeContext
>>              else
>>                  ctx->pic_start = next;
>>              ctx->op->free(avctx, pic);
>> +            base_encode_pic_free(pic);
>>          } else {
>>              prev = pic;
>>          }
>> @@ -416,7 +430,7 @@ static int hw_base_encode_send_frame(AVCodecContext
>> *avctx, FFHWBaseEncodeContex
>>          if (err < 0)
>>              return err;
>>
>> -        pic = ctx->op->alloc(avctx, frame);
>> +        pic = av_mallocz(sizeof(*pic));
>>          if (!pic)
>>              return AVERROR(ENOMEM);
>>
>> @@ -467,6 +481,9 @@ static int hw_base_encode_send_frame(AVCodecContext
>> *avctx, FFHWBaseEncodeContex
>>              ctx->pic_end       = pic;
>>          }
>>
>> +        err = ctx->op->init(avctx, pic);
>> +        if (err < 0)
>> +            goto fail;
>>      } else {
>>          ctx->end_of_stream = 1;
>>
>> @@ -480,6 +497,7 @@ static int hw_base_encode_send_frame(AVCodecContext
>> *avctx, FFHWBaseEncodeContex
>>
>> fail:
>>      ctx->op->free(avctx, pic);
>> +    base_encode_pic_free(pic);
>>      return err;
>> }
>>
>> @@ -529,7 +547,7 @@ int
>> ff_hw_base_encode_receive_packet(FFHWBaseEncodeContext *ctx,
>>      AVFrame *frame = ctx->frame;
>>      int err;
>>
>> -    av_assert0(ctx->op && ctx->op->alloc && ctx->op->issue &&
>> +    av_assert0(ctx->op && ctx->op->init && ctx->op->issue &&
>>                 ctx->op->output && ctx->op->free);
>>
>> start:
>> @@ -737,17 +755,6 @@ fail:
>>      return err;
>> }
>>
>> -int ff_hw_base_encode_free(FFHWBaseEncodePicture *pic) -{
>> -    av_frame_free(&pic->input_image);
>> -    av_frame_free(&pic->recon_image);
>> -
>> -    av_buffer_unref(&pic->opaque_ref);
>> -    av_freep(&pic->priv_data);
>> -
>> -    return 0;
>> -}
> 
> There's still somewhere in d3d12va_encode that uses this function.
> 
>> -
>> int ff_hw_base_encode_init(AVCodecContext *avctx, FFHWBaseEncodeContext
>> *ctx)  {
>>      ctx->log_ctx = (void *)avctx;
>> diff --git a/libavcodec/hw_base_encode.h b/libavcodec/hw_base_encode.h index
>> ac0cc7b80c..d6ec5a611a 100644
>> --- a/libavcodec/hw_base_encode.h
>> +++ b/libavcodec/hw_base_encode.h
>> @@ -59,6 +59,11 @@ enum {
>> };
>>
>> typedef struct FFHWBaseEncodePicture {
>> +    /* API-specific private data */
>> +    void *priv;
>> +    /* Codec-specific private data */
>> +    void *codec_priv;
>> +
>>      struct FFHWBaseEncodePicture *next;
>>
>>      int64_t         display_order;
>> @@ -78,8 +83,6 @@ typedef struct FFHWBaseEncodePicture {
>>      AVFrame        *input_image;
>>      AVFrame        *recon_image;
>>
>> -    void           *priv_data;
>> -
>>      // Whether this picture is a reference picture.
>>      int             is_reference;
>>
>> @@ -104,13 +107,15 @@ typedef struct FFHWBaseEncodePicture {  }
>> FFHWBaseEncodePicture;
>>
>> typedef struct FFHWEncodePictureOperation {
>> -    // Alloc memory for the picture structure and initialize the API-specific internals
>> -    // based of the given frame.
>> -    FFHWBaseEncodePicture * (*alloc)(AVCodecContext *avctx, const AVFrame
>> *frame);
>> +    /* Size of API-specific internal picture data */
>> +    size_t priv_size;
>> +    /* Initialize API-specific internals */
>> +    int (*init)(AVCodecContext *avctx, FFHWBaseEncodePicture *pic);
>> +
>>      // Issue the picture structure, which will send the frame surface to HW Encode
>> API.
>> -    int (*issue)(AVCodecContext *avctx, const FFHWBaseEncodePicture
>> *base_pic);
>> +    int (*issue)(AVCodecContext *avctx, FFHWBaseEncodePicture
>> + *base_pic);
>>      // Get the output AVPacket.
>> -    int (*output)(AVCodecContext *avctx, const FFHWBaseEncodePicture
>> *base_pic, AVPacket *pkt);
>> +    int (*output)(AVCodecContext *avctx, FFHWBaseEncodePicture
>> + *base_pic, AVPacket *pkt);
>>      // Free the picture structure.
>>      int (*free)(AVCodecContext *avctx, FFHWBaseEncodePicture *base_pic);  }
>> FFHWEncodePictureOperation; @@ -228,8 +233,6 @@ int
>> ff_hw_base_init_gop_structure(FFHWBaseEncodeContext *ctx, AVCodecContext
>> *av  int ff_hw_base_get_recon_format(FFHWBaseEncodeContext *ctx, const void
>> *hwconfig,
>>                                  enum AVPixelFormat *fmt);
>>
>> -int ff_hw_base_encode_free(FFHWBaseEncodePicture *pic);
>> -
>> int ff_hw_base_encode_init(AVCodecContext *avctx, FFHWBaseEncodeContext
>> *ctx);
>>
>> int ff_hw_base_encode_close(FFHWBaseEncodeContext *ctx); diff --git
>> a/libavcodec/vaapi_encode.c b/libavcodec/vaapi_encode.c index
>> afdf3fe3d8..97a967b1d4 100644
>> --- a/libavcodec/vaapi_encode.c
>> +++ b/libavcodec/vaapi_encode.c
>> @@ -267,7 +267,7 @@ static int vaapi_encode_make_tile_slice(AVCodecContext
>> *avctx,  }
>>
>> static int vaapi_encode_issue(AVCodecContext *avctx,
>> -                              const FFHWBaseEncodePicture *base_pic)
>> +                              FFHWBaseEncodePicture *base_pic)
>> {
>>      FFHWBaseEncodeContext *base_ctx = avctx->priv_data;
>>      VAAPIEncodeContext         *ctx = avctx->priv_data;
>> @@ -364,7 +364,7 @@ static int vaapi_encode_issue(AVCodecContext *avctx,
>>      }
>>
>>      if (ctx->codec->init_picture_params) {
>> -        err = ctx->codec->init_picture_params(avctx, pic);
>> +        err = ctx->codec->init_picture_params(avctx, base_pic);
>>          if (err < 0) {
>>              av_log(avctx, AV_LOG_ERROR, "Failed to initialise picture "
>>                     "parameters: %d.\n", err); @@ -493,7 +493,7 @@ static int
>> vaapi_encode_issue(AVCodecContext *avctx,
>>          }
>>
>>          if (ctx->codec->init_slice_params) {
>> -            err = ctx->codec->init_slice_params(avctx, pic, slice);
>> +            err = ctx->codec->init_slice_params(avctx, base_pic,
>> + slice);
>>              if (err < 0) {
>>                  av_log(avctx, AV_LOG_ERROR, "Failed to initialise slice "
>>                         "parameters: %d.\n", err); @@ -773,7 +773,7 @@ end:
>> }
>>
>> static int vaapi_encode_output(AVCodecContext *avctx,
>> -                               const FFHWBaseEncodePicture *base_pic, AVPacket *pkt)
>> +                               FFHWBaseEncodePicture *base_pic,
>> + AVPacket *pkt)
>> {
>>      FFHWBaseEncodeContext *base_ctx = avctx->priv_data;
>>      VAAPIEncodeContext         *ctx = avctx->priv_data;
>> @@ -839,56 +839,45 @@ static int vaapi_encode_discard(AVCodecContext
>> *avctx,
>>      return 0;
>> }
>>
>> -static FFHWBaseEncodePicture *vaapi_encode_alloc(AVCodecContext *avctx,
>> -                                                 const AVFrame *frame)
>> +static int vaapi_encode_init(AVCodecContext *avctx,
>> +FFHWBaseEncodePicture *pic)
>> {
>>      VAAPIEncodeContext *ctx = avctx->priv_data;
>> -    VAAPIEncodePicture *pic;
>> -
>> -    pic = av_mallocz(sizeof(*pic));
>> -    if (!pic)
>> -        return NULL;
>> +    VAAPIEncodePicture *priv = pic->priv;
>> +    AVFrame *frame = pic->input_image;
>>
>>      if (ctx->codec->picture_priv_data_size > 0) {
>> -        pic->base.priv_data = av_mallocz(ctx->codec->picture_priv_data_size);
>> -        if (!pic->base.priv_data) {
>> -            av_freep(&pic);
>> -            return NULL;
>> -        }
>> +        pic->codec_priv = av_mallocz(ctx->codec->picture_priv_data_size);
>> +        if (!pic->codec_priv)
>> +            return AVERROR(ENOMEM);
>>      }
>>
>> -    pic->input_surface = (VASurfaceID)(uintptr_t)frame->data[3];
>> -    pic->recon_surface = VA_INVALID_ID;
>> -    pic->output_buffer = VA_INVALID_ID;
>> +    priv->input_surface = (VASurfaceID)(uintptr_t)frame->data[3];
>> +    priv->recon_surface = VA_INVALID_ID;
>> +    priv->output_buffer = VA_INVALID_ID;
>>
>> -    return &pic->base;
>> +    return 0;
>> }
>>
>> -static int vaapi_encode_free(AVCodecContext *avctx,
>> -                             FFHWBaseEncodePicture *base_pic)
>> +static int vaapi_encode_free(AVCodecContext *avctx,
>> +FFHWBaseEncodePicture *pic)
>> {
>> -    VAAPIEncodePicture *pic = (VAAPIEncodePicture*)base_pic;
>> +    VAAPIEncodePicture *priv = pic->priv;
>>      int i;
>>
>> -    if (base_pic->encode_issued)
>> -        vaapi_encode_discard(avctx, pic);
>> +    if (pic->encode_issued)
>> +        vaapi_encode_discard(avctx, priv);
>>
>> -    if (pic->slices) {
>> -        for (i = 0; i < pic->nb_slices; i++)
>> -            av_freep(&pic->slices[i].codec_slice_params);
>> +    if (priv->slices) {
>> +        for (i = 0; i < priv->nb_slices; i++)
>> +            av_freep(&priv->slices[i].codec_slice_params);
>>      }
>>
>> -    ff_hw_base_encode_free(base_pic);
>> -
>> -    av_freep(&pic->param_buffers);
>> -    av_freep(&pic->slices);
>> +    av_freep(&priv->param_buffers);
>> +    av_freep(&priv->slices);
>>      // Output buffer should already be destroyed.
>> -    av_assert0(pic->output_buffer == VA_INVALID_ID);
>> -
>> -    av_freep(&pic->codec_picture_params);
>> -    av_freep(&pic->roi);
>> +    av_assert0(priv->output_buffer == VA_INVALID_ID);
>>
>> -    av_free(pic);
>> +    av_freep(&priv->codec_picture_params);
>> +    av_freep(&priv->roi);
>>
>>      return 0;
>> }
>> @@ -2090,7 +2079,8 @@ static av_cold int
>> vaapi_encode_create_recon_frames(AVCodecContext *avctx)  }
>>
>> static const FFHWEncodePictureOperation vaapi_op = {
>> -    .alloc  = &vaapi_encode_alloc,
>> +    .priv_size = sizeof(VAAPIEncodePicture),
>> +    .init = &vaapi_encode_init,
>>
>>      .issue  = &vaapi_encode_issue,
>>
>> diff --git a/libavcodec/vaapi_encode.h b/libavcodec/vaapi_encode.h index
>> d76cdb8662..78e02799c2 100644
>> --- a/libavcodec/vaapi_encode.h
>> +++ b/libavcodec/vaapi_encode.h
>> @@ -301,9 +301,9 @@ typedef struct VAAPIEncodeType {
>>      // Fill the parameter structures.
>>      int  (*init_sequence_params)(AVCodecContext *avctx);
>>      int   (*init_picture_params)(AVCodecContext *avctx,
>> -                                 VAAPIEncodePicture *pic);
>> +                                 FFHWBaseEncodePicture *pic);
>>      int     (*init_slice_params)(AVCodecContext *avctx,
>> -                                 VAAPIEncodePicture *pic,
>> +                                 FFHWBaseEncodePicture *pice,
>>                                   VAAPIEncodeSlice *slice);
>>
>>      // The type used by the packed header: this should look like diff --git
>> a/libavcodec/vaapi_encode_av1.c b/libavcodec/vaapi_encode_av1.c index
>> 26a5707bf5..d3ffde3949 100644
>> --- a/libavcodec/vaapi_encode_av1.c
>> +++ b/libavcodec/vaapi_encode_av1.c
>> @@ -466,12 +466,12 @@ end:
>> }
>>
>> static int vaapi_encode_av1_init_picture_params(AVCodecContext *avctx,
>> -                                                VAAPIEncodePicture *vaapi_pic)
>> +                                                FFHWBaseEncodePicture
>> + *pic)
>> {
>>      VAAPIEncodeContext              *ctx = avctx->priv_data;
>>      VAAPIEncodeAV1Context          *priv = avctx->priv_data;
>> -    const FFHWBaseEncodePicture     *pic = &vaapi_pic->base;
>> -    VAAPIEncodeAV1Picture          *hpic = pic->priv_data;
>> +    VAAPIEncodePicture        *vaapi_pic = pic->priv;
>> +    VAAPIEncodeAV1Picture          *hpic = pic->codec_priv;
>>      AV1RawOBU                    *fh_obu = &priv->fh;
>>      AV1RawFrameHeader                *fh = &fh_obu->obu.frame.header;
>>      VAEncPictureParameterBufferAV1 *vpic = vaapi_pic->codec_picture_params;
>> @@ -503,7 +503,7 @@ static int
>> vaapi_encode_av1_init_picture_params(AVCodecContext *avctx,
>>          fh->frame_type = AV1_FRAME_INTER;
>>          fh->base_q_idx = priv->q_idx_p;
>>          ref = pic->refs[0][pic->nb_refs[0] - 1];
>> -        href = ref->priv_data;
>> +        href = ref->codec_priv;
>>          hpic->slot = !href->slot;
>>          hpic->last_idr_frame = href->last_idr_frame;
>>          fh->refresh_frame_flags = 1 << hpic->slot; @@ -519,7 +519,7 @@ static int
>> vaapi_encode_av1_init_picture_params(AVCodecContext *avctx,
>>          /** set the 2nd nearest frame in L0 as Golden frame. */
>>          if (pic->nb_refs[0] > 1) {
>>              ref = pic->refs[0][pic->nb_refs[0] - 2];
>> -            href = ref->priv_data;
>> +            href = ref->codec_priv;
>>              fh->ref_frame_idx[3] = href->slot;
>>              fh->ref_order_hint[href->slot] = ref->display_order - href->last_idr_frame;
>>              vpic->ref_frame_ctrl_l0.fields.search_idx1 = AV1_REF_FRAME_GOLDEN;
>> @@ -540,7 +540,7 @@ static int
>> vaapi_encode_av1_init_picture_params(AVCodecContext *avctx,
>>          vpic->ref_frame_ctrl_l1.fields.search_idx0 = AV1_REF_FRAME_BWDREF;
>>
>>          ref                            = pic->refs[0][pic->nb_refs[0] - 1];
>> -        href                           = ref->priv_data;
>> +        href                           = ref->codec_priv;
>>          hpic->last_idr_frame           = href->last_idr_frame;
>>          fh->primary_ref_frame          = href->slot;
>>          fh->ref_order_hint[href->slot] = ref->display_order - href->last_idr_frame;
>> @@ -549,7 +549,7 @@ static int
>> vaapi_encode_av1_init_picture_params(AVCodecContext *avctx,
>>          }
>>
>>          ref                            = pic->refs[1][pic->nb_refs[1] - 1];
>> -        href                           = ref->priv_data;
>> +        href                           = ref->codec_priv;
>>          fh->ref_order_hint[href->slot] = ref->display_order - href->last_idr_frame;
>>          for (i = AV1_REF_FRAME_GOLDEN; i < AV1_REFS_PER_FRAME; i++) {
>>              fh->ref_frame_idx[i] = href->slot; @@ -634,7 +634,7 @@ static int
>> vaapi_encode_av1_init_picture_params(AVCodecContext *avctx,
>>          for (int j = 0; j < pic->nb_refs[i]; j++) {
>>              FFHWBaseEncodePicture *ref_pic = pic->refs[i][j];
>>
>> -            slot = ((VAAPIEncodeAV1Picture*)ref_pic->priv_data)->slot;
>> +            slot = ((VAAPIEncodeAV1Picture*)ref_pic->codec_priv)->slot;
>>              av_assert0(vpic->reference_frames[slot] == VA_INVALID_SURFACE);
>>
>>              vpic->reference_frames[slot] = ((VAAPIEncodePicture *)ref_pic)-
>>> recon_surface; @@ -732,7 +732,7 @@ end:
>> }
>>
>> static int vaapi_encode_av1_init_slice_params(AVCodecContext *avctx,
>> -                                              VAAPIEncodePicture *pic,
>> +                                              FFHWBaseEncodePicture
>> + *base,
>>                                                VAAPIEncodeSlice *slice)  {
>>      VAAPIEncodeAV1Context      *priv = avctx->priv_data;
>> @@ -770,7 +770,7 @@ static int
>> vaapi_encode_av1_write_picture_header(AVCodecContext *avctx,
>>      /** Pack repeat frame header. */
>>      if (pic->display_order > pic->encode_order) {
>>          memset(fh_obu, 0, sizeof(*fh_obu));
>> -        href = pic->refs[0][pic->nb_refs[0] - 1]->priv_data;
>> +        href = pic->refs[0][pic->nb_refs[0] - 1]->codec_priv;
>>          fh_obu->header.obu_type = AV1_OBU_FRAME_HEADER;
>>          fh_obu->header.obu_has_size_field = 1;
>>
>> diff --git a/libavcodec/vaapi_encode_h264.c b/libavcodec/vaapi_encode_h264.c
>> index d156719728..f9e86d07f3 100644
>> --- a/libavcodec/vaapi_encode_h264.c
>> +++ b/libavcodec/vaapi_encode_h264.c
>> @@ -620,14 +620,14 @@ static int
>> vaapi_encode_h264_init_sequence_params(AVCodecContext *avctx)  }
>>
>> static int vaapi_encode_h264_init_picture_params(AVCodecContext *avctx,
>> -                                                 VAAPIEncodePicture *vaapi_pic)
>> +                                                 FFHWBaseEncodePicture
>> + *pic)
>> {
>>      FFHWBaseEncodeContext       *base_ctx = avctx->priv_data;
>>      VAAPIEncodeH264Context          *priv = avctx->priv_data;
>> -    const FFHWBaseEncodePicture      *pic = &vaapi_pic->base;
>> -    VAAPIEncodeH264Picture          *hpic = pic->priv_data;
>> +    VAAPIEncodePicture         *vaapi_pic = pic->priv;
>> +    VAAPIEncodeH264Picture          *hpic = pic->codec_priv;
>>      FFHWBaseEncodePicture           *prev = pic->prev;
>> -    VAAPIEncodeH264Picture         *hprev = prev ? prev->priv_data : NULL;
>> +    VAAPIEncodeH264Picture         *hprev = prev ? prev->codec_priv : NULL;
>>      VAEncPictureParameterBufferH264 *vpic = vaapi_pic->codec_picture_params;
>>      int i, j = 0;
>>
>> @@ -736,7 +736,7 @@ static int
>> vaapi_encode_h264_init_picture_params(AVCodecContext *avctx,
>>              VAAPIEncodeH264Picture *href;
>>
>>              av_assert0(ref && ref->encode_order < pic->encode_order);
>> -            href = ref->priv_data;
>> +            href = ref->codec_priv;
>>
>>              vpic->ReferenceFrames[j++] = (VAPictureH264) {
>>                  .picture_id          = ((VAAPIEncodePicture *)ref)->recon_surface,
>> @@ -778,15 +778,15 @@ static void
>> vaapi_encode_h264_default_ref_pic_list(AVCodecContext *avctx,
>>
>>      prev = pic->prev;
>>      av_assert0(prev);
>> -    hp = pic->priv_data;
>> +    hp = pic->codec_priv;
>>
>>      for (i = 0; i < pic->prev->nb_dpb_pics; i++) {
>> -        hn = prev->dpb[i]->priv_data;
>> +        hn = prev->dpb[i]->codec_priv;
>>          av_assert0(hn->frame_num < hp->frame_num);
>>
>>          if (pic->type == FF_HW_PICTURE_TYPE_P) {
>>              for (j = n; j > 0; j--) {
>> -                hc = rpl0[j - 1]->base.priv_data;
>> +                hc = rpl0[j - 1]->base.codec_priv;
>>                  av_assert0(hc->frame_num != hn->frame_num);
>>                  if (hc->frame_num > hn->frame_num)
>>                      break;
>> @@ -796,7 +796,7 @@ static void
>> vaapi_encode_h264_default_ref_pic_list(AVCodecContext *avctx,
>>
>>          } else if (pic->type == FF_HW_PICTURE_TYPE_B) {
>>              for (j = n; j > 0; j--) {
>> -                hc = rpl0[j - 1]->base.priv_data;
>> +                hc = rpl0[j - 1]->base.codec_priv;
>>                  av_assert0(hc->pic_order_cnt != hp->pic_order_cnt);
>>                  if (hc->pic_order_cnt < hp->pic_order_cnt) {
>>                      if (hn->pic_order_cnt > hp->pic_order_cnt || @@ -811,7 +811,7 @@
>> static void vaapi_encode_h264_default_ref_pic_list(AVCodecContext *avctx,
>>              rpl0[j] = (VAAPIEncodePicture *)prev->dpb[i];
>>
>>              for (j = n; j > 0; j--) {
>> -                hc = rpl1[j - 1]->base.priv_data;
>> +                hc = rpl1[j - 1]->base.codec_priv;
>>                  av_assert0(hc->pic_order_cnt != hp->pic_order_cnt);
>>                  if (hc->pic_order_cnt > hp->pic_order_cnt) {
>>                      if (hn->pic_order_cnt < hp->pic_order_cnt || @@ -843,7 +843,7 @@
>> static void vaapi_encode_h264_default_ref_pic_list(AVCodecContext *avctx,
>>          av_log(avctx, AV_LOG_DEBUG, "Default RefPicList0 for fn=%d/poc=%d:",
>>                 hp->frame_num, hp->pic_order_cnt);
>>          for (i = 0; i < n; i++) {
>> -            hn = rpl0[i]->base.priv_data;
>> +            hn = rpl0[i]->base.codec_priv;
>>              av_log(avctx, AV_LOG_DEBUG, "  fn=%d/poc=%d",
>>                     hn->frame_num, hn->pic_order_cnt);
>>          }
>> @@ -853,7 +853,7 @@ static void
>> vaapi_encode_h264_default_ref_pic_list(AVCodecContext *avctx,
>>          av_log(avctx, AV_LOG_DEBUG, "Default RefPicList1 for fn=%d/poc=%d:",
>>                 hp->frame_num, hp->pic_order_cnt);
>>          for (i = 0; i < n; i++) {
>> -            hn = rpl1[i]->base.priv_data;
>> +            hn = rpl1[i]->base.codec_priv;
>>              av_log(avctx, AV_LOG_DEBUG, "  fn=%d/poc=%d",
>>                     hn->frame_num, hn->pic_order_cnt);
>>          }
>> @@ -864,12 +864,12 @@ static void
>> vaapi_encode_h264_default_ref_pic_list(AVCodecContext *avctx,  }
>>
>> static int vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
>> -                                               VAAPIEncodePicture *vaapi_pic,
>> +                                               FFHWBaseEncodePicture
>> + *pic,
>>                                                 VAAPIEncodeSlice *slice)  {
>>      VAAPIEncodeH264Context          *priv = avctx->priv_data;
>> -    const FFHWBaseEncodePicture      *pic = &vaapi_pic->base;
>> -    VAAPIEncodeH264Picture          *hpic = pic->priv_data;
>> +    VAAPIEncodePicture         *vaapi_pic = pic->priv;
>> +    VAAPIEncodeH264Picture          *hpic = pic->codec_priv;
>>      FFHWBaseEncodePicture           *prev = pic->prev;
>>      H264RawSPS                       *sps = &priv->raw_sps;
>>      H264RawPPS                       *pps = &priv->raw_pps;
>> @@ -931,7 +931,7 @@ static int
>> vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
>>          } else {
>>              sh->adaptive_ref_pic_marking_mode_flag = 1;
>>              for (i = 0; i < discard; i++) {
>> -                VAAPIEncodeH264Picture *old = discard_list[i]->priv_data;
>> +                VAAPIEncodeH264Picture *old =
>> + discard_list[i]->codec_priv;
>>                  av_assert0(old->frame_num < hpic->frame_num);
>>                  sh->mmco[i].memory_management_control_operation = 1;
>>                  sh->mmco[i].difference_of_pic_nums_minus1 = @@ -963,7 +963,7 @@
>> static int vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
>>              if (need_rplm) {
>>                  int pic_num = hpic->frame_num;
>>                  for (i = 0; i < pic->nb_refs[0]; i++) {
>> -                    href = pic->refs[0][i]->priv_data;
>> +                    href = pic->refs[0][i]->codec_priv;
>>                      av_assert0(href->frame_num != pic_num);
>>                      if (href->frame_num < pic_num) {
>>                          sh->rplm_l0[i].modification_of_pic_nums_idc = 0; @@ -984,7
>> +984,7 @@ static int vaapi_encode_h264_init_slice_params(AVCodecContext
>> *avctx,
>>              int n0 = 0, n1 = 0;
>>              for (i = 0; i < pic->nb_refs[0]; i++) {
>>                  av_assert0(pic->refs[0][i]);
>> -                href = pic->refs[0][i]->priv_data;
>> +                href = pic->refs[0][i]->codec_priv;
>>                  av_assert0(href->pic_order_cnt < hpic->pic_order_cnt);
>>                  if (pic->refs[0][i] != (FFHWBaseEncodePicture *)def_l0[n0])
>>                      need_rplm_l0 = 1;
>> @@ -993,7 +993,7 @@ static int
>> vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
>>
>>              for (i = 0; i < pic->nb_refs[1]; i++) {
>>                  av_assert0(pic->refs[1][i]);
>> -                href = pic->refs[1][i]->priv_data;
>> +                href = pic->refs[1][i]->codec_priv;
>>                  av_assert0(href->pic_order_cnt > hpic->pic_order_cnt);
>>                  if (pic->refs[1][i] != (FFHWBaseEncodePicture *)def_l1[n1])
>>                      need_rplm_l1 = 1;
>> @@ -1004,7 +1004,7 @@ static int
>> vaapi_encode_h264_init_slice_params(AVCodecContext *avctx,
>>              if (need_rplm_l0) {
>>                  int pic_num = hpic->frame_num;
>>                  for (i = j = 0; i < pic->nb_refs[0]; i++) {
>> -                    href = pic->refs[0][i]->priv_data;
>> +                    href = pic->refs[0][i]->codec_priv;
>>                      av_assert0(href->frame_num != pic_num);
>>                      if (href->frame_num < pic_num) {
>>                          sh->rplm_l0[j].modification_of_pic_nums_idc = 0; @@ -1026,7
>> +1026,7 @@ static int vaapi_encode_h264_init_slice_params(AVCodecContext
>> *avctx,
>>              if (need_rplm_l1) {
>>                  int pic_num = hpic->frame_num;
>>                  for (i = j = 0; i < pic->nb_refs[1]; i++) {
>> -                    href = pic->refs[1][i]->priv_data;
>> +                    href = pic->refs[1][i]->codec_priv;
>>                      av_assert0(href->frame_num != pic_num);
>>                      if (href->frame_num < pic_num) {
>>                          sh->rplm_l1[j].modification_of_pic_nums_idc = 0; diff --git
>> a/libavcodec/vaapi_encode_h265.c b/libavcodec/vaapi_encode_h265.c index
>> bbd174f975..3ec5aef045 100644
>> --- a/libavcodec/vaapi_encode_h265.c
>> +++ b/libavcodec/vaapi_encode_h265.c
>> @@ -757,14 +757,14 @@ static int
>> vaapi_encode_h265_init_sequence_params(AVCodecContext *avctx)  }
>>
>> static int vaapi_encode_h265_init_picture_params(AVCodecContext *avctx,
>> -                                                 VAAPIEncodePicture *vaapi_pic)
>> +                                                 FFHWBaseEncodePicture
>> + *pic)
>> {
>>      FFHWBaseEncodeContext       *base_ctx = avctx->priv_data;
>>      VAAPIEncodeH265Context          *priv = avctx->priv_data;
>> -    FFHWBaseEncodePicture            *pic = &vaapi_pic->base;
>> -    VAAPIEncodeH265Picture          *hpic = pic->priv_data;
>> +    VAAPIEncodePicture         *vaapi_pic = pic->priv;
>> +    VAAPIEncodeH265Picture          *hpic = pic->codec_priv;
> 
> Same changes should be made in d3d12va_encode_hevc
> 
>>      FFHWBaseEncodePicture           *prev = pic->prev;
>> -    VAAPIEncodeH265Picture         *hprev = prev ? prev->priv_data : NULL;
>> +    VAAPIEncodeH265Picture         *hprev = prev ? prev->codec_priv : NULL;
>>      VAEncPictureParameterBufferHEVC *vpic = vaapi_pic->codec_picture_params;
>>      int i, j = 0;
>>
>> @@ -923,7 +923,7 @@ static int
>> vaapi_encode_h265_init_picture_params(AVCodecContext *avctx,
>>              VAAPIEncodeH265Picture *href;
>>
>>              av_assert0(ref && ref->encode_order < pic->encode_order);
>> -            href = ref->priv_data;
>> +            href = ref->codec_priv;
>>
>>              vpic->reference_frames[j++] = (VAPictureHEVC) {
>>                  .picture_id    = ((VAAPIEncodePicture *)ref)->recon_surface,
>> @@ -973,13 +973,13 @@ static int
>> vaapi_encode_h265_init_picture_params(AVCodecContext *avctx,  }
>>
>> static int vaapi_encode_h265_init_slice_params(AVCodecContext *avctx,
>> -                                               VAAPIEncodePicture *vaapi_pic,
>> +                                               FFHWBaseEncodePicture
>> + *pic,
>>                                                 VAAPIEncodeSlice *slice)  {
>>      FFHWBaseEncodeContext        *base_ctx = avctx->priv_data;
>>      VAAPIEncodeH265Context           *priv = avctx->priv_data;
>> -    const FFHWBaseEncodePicture       *pic = &vaapi_pic->base;
>> -    VAAPIEncodeH265Picture           *hpic = pic->priv_data;
>> +    VAAPIEncodePicture          *vaapi_pic = pic->priv;
>> +    VAAPIEncodeH265Picture           *hpic = pic->codec_priv;
>>      const H265RawSPS                  *sps = &priv->raw_sps;
>>      const H265RawPPS                  *pps = &priv->raw_pps;
>>      H265RawSliceHeader                 *sh = &priv->raw_slice.header;
>> @@ -1021,7 +1021,7 @@ static int
>> vaapi_encode_h265_init_slice_params(AVCodecContext *avctx,
>>          rps_pics = 0;
>>          for (i = 0; i < MAX_REFERENCE_LIST_NUM; i++) {
>>              for (j = 0; j < pic->nb_refs[i]; j++) {
>> -                strp = pic->refs[i][j]->priv_data;
>> +                strp = pic->refs[i][j]->codec_priv;
>>                  rps_poc[rps_pics]  = strp->pic_order_cnt;
>>                  rps_used[rps_pics] = 1;
>>                  ++rps_pics;
>> @@ -1046,7 +1046,7 @@ static int
>> vaapi_encode_h265_init_slice_params(AVCodecContext *avctx,
>>              if (j < pic->nb_refs[1])
>>                  continue;
>>
>> -            strp = pic->dpb[i]->priv_data;
>> +            strp = pic->dpb[i]->codec_priv;
>>              rps_poc[rps_pics]  = strp->pic_order_cnt;
>>              rps_used[rps_pics] = 0;
>>              ++rps_pics;
>> diff --git a/libavcodec/vaapi_encode_mjpeg.c
>> b/libavcodec/vaapi_encode_mjpeg.c index 0ca8d676dd..5a244bb3aa 100644
>> --- a/libavcodec/vaapi_encode_mjpeg.c
>> +++ b/libavcodec/vaapi_encode_mjpeg.c
>> @@ -220,11 +220,11 @@ static int
>> vaapi_encode_mjpeg_write_extra_buffer(AVCodecContext *avctx,  }
>>
>> static int vaapi_encode_mjpeg_init_picture_params(AVCodecContext *avctx,
>> -                                                  VAAPIEncodePicture *vaapi_pic)
>> +                                                  FFHWBaseEncodePicture
>> + *pic)
>> {
>>      FFHWBaseEncodeContext       *base_ctx = avctx->priv_data;
>>      VAAPIEncodeMJPEGContext         *priv = avctx->priv_data;
>> -    const FFHWBaseEncodePicture      *pic = &vaapi_pic->base;
>> +    VAAPIEncodePicture         *vaapi_pic = pic->priv;
>>      JPEGRawFrameHeader                *fh = &priv->frame_header;
>>      JPEGRawScanHeader                 *sh = &priv->scan.header;
>>      VAEncPictureParameterBufferJPEG *vpic = vaapi_pic->codec_picture_params;
>> @@ -414,10 +414,11 @@ static int
>> vaapi_encode_mjpeg_init_picture_params(AVCodecContext *avctx,  }
>>
>> static int vaapi_encode_mjpeg_init_slice_params(AVCodecContext *avctx,
>> -                                                VAAPIEncodePicture *pic,
>> +                                                FFHWBaseEncodePicture
>> + *base,
>>                                                  VAAPIEncodeSlice *slice)  {
>>      VAAPIEncodeMJPEGContext         *priv = avctx->priv_data;
>> +    VAAPIEncodePicture               *pic = base->priv;
>>      JPEGRawScanHeader                 *sh = &priv->scan.header;
>>      VAEncSliceParameterBufferJPEG *vslice = slice->codec_slice_params;
>>      int i;
>> diff --git a/libavcodec/vaapi_encode_mpeg2.c
>> b/libavcodec/vaapi_encode_mpeg2.c index be801d21d2..7dadcf9140 100644
>> --- a/libavcodec/vaapi_encode_mpeg2.c
>> +++ b/libavcodec/vaapi_encode_mpeg2.c
>> @@ -418,10 +418,10 @@ static int
>> vaapi_encode_mpeg2_init_sequence_params(AVCodecContext *avctx)  }
>>
>> static int vaapi_encode_mpeg2_init_picture_params(AVCodecContext *avctx,
>> -                                                  VAAPIEncodePicture *vaapi_pic)
>> +                                                  FFHWBaseEncodePicture
>> + *pic)
>> {
>>      VAAPIEncodeMPEG2Context          *priv = avctx->priv_data;
>> -    const FFHWBaseEncodePicture       *pic = &vaapi_pic->base;
>> +    VAAPIEncodePicture          *vaapi_pic = pic->priv;
>>      MPEG2RawPictureHeader              *ph = &priv->picture_header;
>>      MPEG2RawPictureCodingExtension    *pce = &priv-
>>> picture_coding_extension.data.picture_coding;
>>      VAEncPictureParameterBufferMPEG2 *vpic = vaapi_pic-
>>> codec_picture_params; @@ -481,10 +481,9 @@ static int
>> vaapi_encode_mpeg2_init_picture_params(AVCodecContext *avctx,  }
>>
>> static int vaapi_encode_mpeg2_init_slice_params(AVCodecContext *avctx,
>> -                                                VAAPIEncodePicture *vaapi_pic,
>> +                                                FFHWBaseEncodePicture
>> + *pic,
>>                                                  VAAPIEncodeSlice *slice)  {
>> -    const FFHWBaseEncodePicture       *pic = &vaapi_pic->base;
>>      VAAPIEncodeMPEG2Context          *priv = avctx->priv_data;
>>      VAEncSliceParameterBufferMPEG2 *vslice = slice->codec_slice_params;
>>      int qp;
>> diff --git a/libavcodec/vaapi_encode_vp8.c b/libavcodec/vaapi_encode_vp8.c
>> index 634b849cd2..8b9cac9ebc 100644
>> --- a/libavcodec/vaapi_encode_vp8.c
>> +++ b/libavcodec/vaapi_encode_vp8.c
>> @@ -74,9 +74,9 @@ static int
>> vaapi_encode_vp8_init_sequence_params(AVCodecContext *avctx)  }
>>
>> static int vaapi_encode_vp8_init_picture_params(AVCodecContext *avctx,
>> -                                                VAAPIEncodePicture *vaapi_pic)
>> +                                                FFHWBaseEncodePicture
>> + *pic)
>> {
>> -    const FFHWBaseEncodePicture     *pic = &vaapi_pic->base;
>> +    VAAPIEncodePicture        *vaapi_pic = pic->priv;
>>      VAAPIEncodeVP8Context          *priv = avctx->priv_data;
>>      VAEncPictureParameterBufferVP8 *vpic = vaapi_pic->codec_picture_params;
>>      int i;
>> diff --git a/libavcodec/vaapi_encode_vp9.c b/libavcodec/vaapi_encode_vp9.c
>> index eac9be82b0..b424357757 100644
>> --- a/libavcodec/vaapi_encode_vp9.c
>> +++ b/libavcodec/vaapi_encode_vp9.c
>> @@ -77,12 +77,12 @@ static int
>> vaapi_encode_vp9_init_sequence_params(AVCodecContext *avctx)  }
>>
>> static int vaapi_encode_vp9_init_picture_params(AVCodecContext *avctx,
>> -                                                VAAPIEncodePicture *vaapi_pic)
>> +                                                FFHWBaseEncodePicture
>> + *pic)
>> {
>>      FFHWBaseEncodeContext      *base_ctx = avctx->priv_data;
>>      VAAPIEncodeVP9Context          *priv = avctx->priv_data;
>> -    const FFHWBaseEncodePicture     *pic = &vaapi_pic->base;
>> -    VAAPIEncodeVP9Picture          *hpic = pic->priv_data;
>> +    VAAPIEncodePicture        *vaapi_pic = pic->priv;
>> +    VAAPIEncodeVP9Picture          *hpic = pic->codec_priv;
>>      VAEncPictureParameterBufferVP9 *vpic = vaapi_pic->codec_picture_params;
>>      int i;
>>      int num_tile_columns;
>> @@ -106,7 +106,7 @@ static int
>> vaapi_encode_vp9_init_picture_params(AVCodecContext *avctx,
>>      case FF_HW_PICTURE_TYPE_P:
>>          av_assert0(!pic->nb_refs[1]);
>>          {
>> -            VAAPIEncodeVP9Picture *href = pic->refs[0][0]->priv_data;
>> +            VAAPIEncodeVP9Picture *href = pic->refs[0][0]->codec_priv;
>>              av_assert0(href->slot == 0 || href->slot == 1);
>>
>>              if (base_ctx->max_b_depth > 0) { @@ -124,8 +124,8 @@ static int
>> vaapi_encode_vp9_init_picture_params(AVCodecContext *avctx,
>>      case FF_HW_PICTURE_TYPE_B:
>>          av_assert0(pic->nb_refs[0] && pic->nb_refs[1]);
>>          {
>> -            VAAPIEncodeVP9Picture *href0 = pic->refs[0][0]->priv_data,
>> -                                  *href1 = pic->refs[1][0]->priv_data;
>> +            VAAPIEncodeVP9Picture *href0 = pic->refs[0][0]->codec_priv,
>> +                                  *href1 = pic->refs[1][0]->codec_priv;
>>              av_assert0(href0->slot < pic->b_depth + 1 &&
>>                         href1->slot < pic->b_depth + 1);
>>
>> @@ -163,7 +163,7 @@ static int
>> vaapi_encode_vp9_init_picture_params(AVCodecContext *avctx,
>>          for (int j = 0; j < pic->nb_refs[i]; j++) {
>>              FFHWBaseEncodePicture *ref_pic = pic->refs[i][j];
>>              int slot;
>> -            slot = ((VAAPIEncodeVP9Picture*)ref_pic->priv_data)->slot;
>> +            slot = ((VAAPIEncodeVP9Picture*)ref_pic->codec_priv)->slot;
>>              av_assert0(vpic->reference_frames[slot] == VA_INVALID_SURFACE);
>>              vpic->reference_frames[slot] = ((VAAPIEncodePicture *)ref_pic)-
>>> recon_surface;
>>          }
>> --
>> 2.45.2.753.g447d99e1c3b
> 
> Thanks for the refactor.
> It looks like an untested patch which still has some compile errors.
> Anyways I could help test and verify when everything's ready.
> 
> Best Regards,
> Tong

I sent the correct patch to IRC for someone to test, but there was no 
response.

I've replied with V2. Verified that VAAPI works, but I have no Windows 
system. Could you test, and if any fixes are required, make them?
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