@@ -26,6 +26,7 @@ version <next>:

 - native Opus encoder

 - ScreenPressor decoder

 - incomplete ClearVideo decoder

+- Intel QSV video scaling filter

 version 3.2:

 - libopenmpt demuxer

@@ -3127,6 +3127,7 @@ rubberband_filter_deps="librubberband"

 sab_filter_deps="gpl swscale"

 scale2ref_filter_deps="swscale"

 scale_filter_deps="swscale"

+scale_qsv_filter_deps="libmfx"

 select_filter_select="pixelutils"

 showcqt_filter_deps="avcodec avformat swscale"

 showcqt_filter_select="fft"

@@ -94,7 +94,6 @@ Stuff that didn't reach the codebase:

   - a853388d2 hevc: change the stride of the MC buffer to be in bytes instead of elements

   - 0cef06df0 checkasm: add HEVC MC tests

   - e7078e842 hevcdsp: add x86 SIMD for MC

-- QSV scaling filter (62c58c5)

 Collateral damage that needs work locally:

 ------------------------------------------

@@ -261,6 +261,7 @@ OBJS-$(CONFIG_ROTATE_FILTER)                 += vf_rotate.o

 OBJS-$(CONFIG_SAB_FILTER)                    += vf_sab.o

 OBJS-$(CONFIG_SCALE_FILTER)                  += vf_scale.o scale.o

 OBJS-$(CONFIG_SCALE_NPP_FILTER)              += vf_scale_npp.o scale.o

+OBJS-$(CONFIG_SCALE_QSV_FILTER)              += vf_scale_qsv.o

 OBJS-$(CONFIG_SCALE_VAAPI_FILTER)            += vf_scale_vaapi.o scale.o

 OBJS-$(CONFIG_SCALE2REF_FILTER)              += vf_scale.o scale.o

 OBJS-$(CONFIG_SELECT_FILTER)                 += f_select.o

@@ -271,6 +271,7 @@ static void register_all(void)

     REGISTER_FILTER(SAB,            sab,            vf);

     REGISTER_FILTER(SCALE,          scale,          vf);

     REGISTER_FILTER(SCALE_NPP,      scale_npp,      vf);

+    REGISTER_FILTER(SCALE_QSV,      scale_qsv,      vf);

     REGISTER_FILTER(SCALE_VAAPI,    scale_vaapi,    vf);

     REGISTER_FILTER(SCALE2REF,      scale2ref,      vf);

     REGISTER_FILTER(SELECT,         select,         vf);

@@ -30,7 +30,7 @@

 #include "libavutil/version.h"

 #define LIBAVFILTER_VERSION_MAJOR   6

-#define LIBAVFILTER_VERSION_MINOR  74

+#define LIBAVFILTER_VERSION_MINOR  75

 #define LIBAVFILTER_VERSION_MICRO 100

 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \

new file mode 100644

@@ -0,0 +1,635 @@

+/*

+ * 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

+ */

+

+/**

+ * @file

+ * scale video filter - QSV

+ */

+

+#include <mfx/mfxvideo.h>

+

+#include <stdio.h>

+#include <string.h>

+

+#include "libavutil/avstring.h"

+#include "libavutil/common.h"

+#include "libavutil/eval.h"

+#include "libavutil/hwcontext.h"

+#include "libavutil/hwcontext_qsv.h"

+#include "libavutil/internal.h"

+#include "libavutil/mathematics.h"

+#include "libavutil/opt.h"

+#include "libavutil/pixdesc.h"

+#include "libavutil/time.h"

+

+#include "avfilter.h"

+#include "formats.h"

+#include "internal.h"

+#include "video.h"

+

+static const char *const var_names[] = {

+    "PI",

+    "PHI",

+    "E",

+    "in_w",   "iw",

+    "in_h",   "ih",

+    "out_w",  "ow",

+    "out_h",  "oh",

+    "a", "dar",

+    "sar",

+    NULL

+};

+

+enum var_name {

+    VAR_PI,

+    VAR_PHI,

+    VAR_E,

+    VAR_IN_W,   VAR_IW,

+    VAR_IN_H,   VAR_IH,

+    VAR_OUT_W,  VAR_OW,

+    VAR_OUT_H,  VAR_OH,

+    VAR_A, VAR_DAR,

+    VAR_SAR,

+    VARS_NB

+};

+

+typedef struct QSVScaleContext {

+    const AVClass *class;

+

+    AVBufferRef *out_frames_ref;

+    /* a clone of the main session, used internally for scaling */

+    mfxSession   session;

+

+    mfxMemId *mem_ids_in;

+    int nb_mem_ids_in;

+

+    mfxMemId *mem_ids_out;

+    int nb_mem_ids_out;

+

+    mfxFrameSurface1 **surface_ptrs_in;

+    int             nb_surface_ptrs_in;

+

+    mfxFrameSurface1 **surface_ptrs_out;

+    int             nb_surface_ptrs_out;

+

+    mfxExtOpaqueSurfaceAlloc opaque_alloc;

+    mfxExtBuffer            *ext_buffers[1];

+

+    int shift_width, shift_height;

+

+    /**

+     * New dimensions. Special values are:

+     *   0 = original width/height

+     *  -1 = keep original aspect

+     */

+    int w, h;

+

+    /**

+     * Output sw format. AV_PIX_FMT_NONE for no conversion.

+     */

+    enum AVPixelFormat format;

+

+    char *w_expr;               ///< width  expression string

+    char *h_expr;               ///< height expression string

+    char *format_str;

+} QSVScaleContext;

+

+static int qsvscale_init(AVFilterContext *ctx)

+{

+    QSVScaleContext *s = ctx->priv;

+

+    if (!strcmp(s->format_str, "same")) {

+        s->format = AV_PIX_FMT_NONE;

+    } else {

+        s->format = av_get_pix_fmt(s->format_str);

+        if (s->format == AV_PIX_FMT_NONE) {

+            av_log(ctx, AV_LOG_ERROR, "Unrecognized pixel format: %s\n", s->format_str);

+            return AVERROR(EINVAL);

+        }

+    }

+

+    return 0;

+}

+

+static void qsvscale_uninit(AVFilterContext *ctx)

+{

+    QSVScaleContext *s = ctx->priv;

+

+    if (s->session) {

+        MFXClose(s->session);

+        s->session = NULL;

+    }

+    av_buffer_unref(&s->out_frames_ref);

+

+    av_freep(&s->mem_ids_in);

+    av_freep(&s->mem_ids_out);

+    s->nb_mem_ids_in  = 0;

+    s->nb_mem_ids_out = 0;

+

+    av_freep(&s->surface_ptrs_in);

+    av_freep(&s->surface_ptrs_out);

+    s->nb_surface_ptrs_in  = 0;

+    s->nb_surface_ptrs_out = 0;

+}

+

+static int qsvscale_query_formats(AVFilterContext *ctx)

+{

+    static const enum AVPixelFormat pixel_formats[] = {

+        AV_PIX_FMT_QSV, AV_PIX_FMT_NONE,

+    };

+    AVFilterFormats *pix_fmts  = ff_make_format_list(pixel_formats);

+    int ret;

+

+    if ((ret = ff_set_common_formats(ctx, pix_fmts)) < 0)

+        return ret;

+

+    return 0;

+}

+

+static int init_out_pool(AVFilterContext *ctx,

+                         int out_width, int out_height)

+{

+    QSVScaleContext *s = ctx->priv;

+

+    AVHWFramesContext *in_frames_ctx;

+    AVHWFramesContext *out_frames_ctx;

+    AVQSVFramesContext *in_frames_hwctx;

+    AVQSVFramesContext *out_frames_hwctx;

+    enum AVPixelFormat in_format;

+    enum AVPixelFormat out_format;

+    int i, ret;

+

+    /* check that we have a hw context */

+    if (!ctx->inputs[0]->hw_frames_ctx) {

+        av_log(ctx, AV_LOG_ERROR, "No hw context provided on input\n");

+        return AVERROR(EINVAL);

+    }

+    in_frames_ctx   = (AVHWFramesContext*)ctx->inputs[0]->hw_frames_ctx->data;

+    in_frames_hwctx = in_frames_ctx->hwctx;

+

+    in_format     = in_frames_ctx->sw_format;

+    out_format    = (s->format == AV_PIX_FMT_NONE) ? in_format : s->format;

+

+    s->out_frames_ref = av_hwframe_ctx_alloc(in_frames_ctx->device_ref);

+    if (!s->out_frames_ref)

+        return AVERROR(ENOMEM);

+    out_frames_ctx   = (AVHWFramesContext*)s->out_frames_ref->data;

+    out_frames_hwctx = out_frames_ctx->hwctx;

+

+    out_frames_ctx->format            = AV_PIX_FMT_QSV;

+    out_frames_ctx->width             = FFALIGN(out_width,  32);

+    out_frames_ctx->height            = FFALIGN(out_height, 32);

+    out_frames_ctx->sw_format         = out_format;

+    out_frames_ctx->initial_pool_size = 32;

+

+    out_frames_hwctx->frame_type = in_frames_hwctx->frame_type;

+

+    ret = av_hwframe_ctx_init(s->out_frames_ref);

+    if (ret < 0)

+        return ret;

+

+    for (i = 0; i < out_frames_hwctx->nb_surfaces; i++) {

+        mfxFrameInfo *info = &out_frames_hwctx->surfaces[i].Info;

+        info->CropW = out_width;

+        info->CropH = out_height;

+    }

+

+    return 0;

+}

+

+static mfxStatus frame_alloc(mfxHDL pthis, mfxFrameAllocRequest *req,

+                             mfxFrameAllocResponse *resp)

+{

+    AVFilterContext *ctx = pthis;

+    QSVScaleContext   *s = ctx->priv;

+

+    if (!(req->Type & MFX_MEMTYPE_VIDEO_MEMORY_PROCESSOR_TARGET) ||

+        !(req->Type & (MFX_MEMTYPE_FROM_VPPIN | MFX_MEMTYPE_FROM_VPPOUT)) ||

+        !(req->Type & MFX_MEMTYPE_EXTERNAL_FRAME))

+        return MFX_ERR_UNSUPPORTED;

+

+    if (req->Type & MFX_MEMTYPE_FROM_VPPIN) {

+        resp->mids           = s->mem_ids_in;

+        resp->NumFrameActual = s->nb_mem_ids_in;

+    } else {

+        resp->mids           = s->mem_ids_out;

+        resp->NumFrameActual = s->nb_mem_ids_out;

+    }

+

+    return MFX_ERR_NONE;

+}

+

+static mfxStatus frame_free(mfxHDL pthis, mfxFrameAllocResponse *resp)

+{

+    return MFX_ERR_NONE;

+}

+

+static mfxStatus frame_lock(mfxHDL pthis, mfxMemId mid, mfxFrameData *ptr)

+{

+    return MFX_ERR_UNSUPPORTED;

+}

+

+static mfxStatus frame_unlock(mfxHDL pthis, mfxMemId mid, mfxFrameData *ptr)

+{

+    return MFX_ERR_UNSUPPORTED;

+}

+

+static mfxStatus frame_get_hdl(mfxHDL pthis, mfxMemId mid, mfxHDL *hdl)

+{

+    *hdl = mid;

+    return MFX_ERR_NONE;

+}

+

+static const mfxHandleType handle_types[] = {

+    MFX_HANDLE_VA_DISPLAY,

+    MFX_HANDLE_D3D9_DEVICE_MANAGER,

+    MFX_HANDLE_D3D11_DEVICE,

+};

+

+static int init_out_session(AVFilterContext *ctx)

+{

+

+    QSVScaleContext                   *s = ctx->priv;

+    AVHWFramesContext     *in_frames_ctx = (AVHWFramesContext*)ctx->inputs[0]->hw_frames_ctx->data;

+    AVHWFramesContext    *out_frames_ctx = (AVHWFramesContext*)s->out_frames_ref->data;

+    AVQSVFramesContext  *in_frames_hwctx = in_frames_ctx->hwctx;

+    AVQSVFramesContext *out_frames_hwctx = out_frames_ctx->hwctx;

+    AVQSVDeviceContext     *device_hwctx = in_frames_ctx->device_ctx->hwctx;

+

+    int opaque = !!(in_frames_hwctx->frame_type & MFX_MEMTYPE_OPAQUE_FRAME);

+

+    mfxHDL handle = NULL;

+    mfxHandleType handle_type;

+    mfxVersion ver;

+    mfxIMPL impl;

+    mfxVideoParam par;

+    mfxStatus err;

+    int i;

+

+    /* extract the properties of the "master" session given to us */

+    err = MFXQueryIMPL(device_hwctx->session, &impl);

+    if (err == MFX_ERR_NONE)

+        err = MFXQueryVersion(device_hwctx->session, &ver);

+    if (err != MFX_ERR_NONE) {

+        av_log(ctx, AV_LOG_ERROR, "Error querying the session attributes\n");

+        return AVERROR_UNKNOWN;

+    }

+

+    for (i = 0; i < FF_ARRAY_ELEMS(handle_types); i++) {

+        err = MFXVideoCORE_GetHandle(device_hwctx->session, handle_types[i], &handle);

+        if (err == MFX_ERR_NONE) {

+            handle_type = handle_types[i];

+            break;

+        }

+    }

+

+    /* create a "slave" session with those same properties, to be used for

+     * actual scaling */

+    err = MFXInit(impl, &ver, &s->session);

+    if (err != MFX_ERR_NONE) {

+        av_log(ctx, AV_LOG_ERROR, "Error initializing a session for scaling\n");

+        return AVERROR_UNKNOWN;

+    }

+

+    if (handle) {

+        err = MFXVideoCORE_SetHandle(s->session, handle_type, handle);

+        if (err != MFX_ERR_NONE)

+            return AVERROR_UNKNOWN;

+    }

+

+    memset(&par, 0, sizeof(par));

+

+    if (opaque) {

+        s->surface_ptrs_in = av_mallocz_array(in_frames_hwctx->nb_surfaces,

+                                              sizeof(*s->surface_ptrs_in));

+        if (!s->surface_ptrs_in)

+            return AVERROR(ENOMEM);

+        for (i = 0; i < in_frames_hwctx->nb_surfaces; i++)

+            s->surface_ptrs_in[i] = in_frames_hwctx->surfaces + i;

+        s->nb_surface_ptrs_in = in_frames_hwctx->nb_surfaces;

+

+        s->surface_ptrs_out = av_mallocz_array(out_frames_hwctx->nb_surfaces,

+                                               sizeof(*s->surface_ptrs_out));

+        if (!s->surface_ptrs_out)

+            return AVERROR(ENOMEM);

+        for (i = 0; i < out_frames_hwctx->nb_surfaces; i++)

+            s->surface_ptrs_out[i] = out_frames_hwctx->surfaces + i;

+        s->nb_surface_ptrs_out = out_frames_hwctx->nb_surfaces;

+

+        s->opaque_alloc.In.Surfaces   = s->surface_ptrs_in;

+        s->opaque_alloc.In.NumSurface = s->nb_surface_ptrs_in;

+        s->opaque_alloc.In.Type       = in_frames_hwctx->frame_type;

+

+        s->opaque_alloc.Out.Surfaces   = s->surface_ptrs_out;

+        s->opaque_alloc.Out.NumSurface = s->nb_surface_ptrs_out;

+        s->opaque_alloc.Out.Type       = out_frames_hwctx->frame_type;

+

+        s->opaque_alloc.Header.BufferId = MFX_EXTBUFF_OPAQUE_SURFACE_ALLOCATION;

+        s->opaque_alloc.Header.BufferSz = sizeof(s->opaque_alloc);

+

+        s->ext_buffers[0] = (mfxExtBuffer*)&s->opaque_alloc;

+

+        par.ExtParam    = s->ext_buffers;

+        par.NumExtParam = FF_ARRAY_ELEMS(s->ext_buffers);

+

+        par.IOPattern = MFX_IOPATTERN_IN_OPAQUE_MEMORY | MFX_IOPATTERN_OUT_OPAQUE_MEMORY;

+    } else {

+        mfxFrameAllocator frame_allocator = {

+            .pthis  = ctx,

+            .Alloc  = frame_alloc,

+            .Lock   = frame_lock,

+            .Unlock = frame_unlock,

+            .GetHDL = frame_get_hdl,

+            .Free   = frame_free,

+        };

+

+        s->mem_ids_in = av_mallocz_array(in_frames_hwctx->nb_surfaces,

+                                         sizeof(*s->mem_ids_in));

+        if (!s->mem_ids_in)

+            return AVERROR(ENOMEM);

+        for (i = 0; i < in_frames_hwctx->nb_surfaces; i++)

+            s->mem_ids_in[i] = in_frames_hwctx->surfaces[i].Data.MemId;

+        s->nb_mem_ids_in = in_frames_hwctx->nb_surfaces;

+

+        s->mem_ids_out = av_mallocz_array(out_frames_hwctx->nb_surfaces,

+                                          sizeof(*s->mem_ids_out));

+        if (!s->mem_ids_out)

+            return AVERROR(ENOMEM);

+        for (i = 0; i < out_frames_hwctx->nb_surfaces; i++)

+            s->mem_ids_out[i] = out_frames_hwctx->surfaces[i].Data.MemId;

+        s->nb_mem_ids_out = out_frames_hwctx->nb_surfaces;

+

+        err = MFXVideoCORE_SetFrameAllocator(s->session, &frame_allocator);

+        if (err != MFX_ERR_NONE)

+            return AVERROR_UNKNOWN;

+

+        par.IOPattern = MFX_IOPATTERN_IN_VIDEO_MEMORY | MFX_IOPATTERN_OUT_VIDEO_MEMORY;

+    }

+

+    par.AsyncDepth = 1;    // TODO async

+

+    par.vpp.In  = in_frames_hwctx->surfaces[0].Info;

+    par.vpp.Out = out_frames_hwctx->surfaces[0].Info;

+

+    /* Apparently VPP requires the frame rate to be set to some value, otherwise

+     * init will fail (probably for the framerate conversion filter). Since we

+     * are only doing scaling here, we just invent an arbitrary

+     * value */

+    par.vpp.In.FrameRateExtN  = 25;

+    par.vpp.In.FrameRateExtD  = 1;

+    par.vpp.Out.FrameRateExtN = 25;

+    par.vpp.Out.FrameRateExtD = 1;

+

+    err = MFXVideoVPP_Init(s->session, &par);

+    if (err != MFX_ERR_NONE) {

+        av_log(ctx, AV_LOG_ERROR, "Error opening the VPP for scaling\n");

+        return AVERROR_UNKNOWN;

+    }

+

+    return 0;

+}

+

+static int init_scale_session(AVFilterContext *ctx, int in_width, int in_height,

+                              int out_width, int out_height)

+{

+    QSVScaleContext *s = ctx->priv;

+

+    int ret;

+

+    qsvscale_uninit(ctx);

+

+    ret = init_out_pool(ctx, out_width, out_height);

+    if (ret < 0)

+        return ret;

+

+    ret = init_out_session(ctx);

+    if (ret < 0)

+        return ret;

+

+    av_buffer_unref(&ctx->outputs[0]->hw_frames_ctx);

+    ctx->outputs[0]->hw_frames_ctx = av_buffer_ref(s->out_frames_ref);

+    if (!ctx->outputs[0]->hw_frames_ctx)

+        return AVERROR(ENOMEM);

+

+    return 0;

+}

+

+static int qsvscale_config_props(AVFilterLink *outlink)

+{

+    AVFilterContext *ctx = outlink->src;

+    AVFilterLink *inlink = outlink->src->inputs[0];

+    QSVScaleContext  *s = ctx->priv;

+    int64_t w, h;

+    double var_values[VARS_NB], res;

+    char *expr;

+    int ret;

+

+    var_values[VAR_PI]    = M_PI;

+    var_values[VAR_PHI]   = M_PHI;

+    var_values[VAR_E]     = M_E;

+    var_values[VAR_IN_W]  = var_values[VAR_IW] = inlink->w;

+    var_values[VAR_IN_H]  = var_values[VAR_IH] = inlink->h;

+    var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN;

+    var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN;

+    var_values[VAR_A]     = (double) inlink->w / inlink->h;

+    var_values[VAR_SAR]   = inlink->sample_aspect_ratio.num ?

+        (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;

+    var_values[VAR_DAR]   = var_values[VAR_A] * var_values[VAR_SAR];

+

+    /* evaluate width and height */

+    av_expr_parse_and_eval(&res, (expr = s->w_expr),

+                           var_names, var_values,

+                           NULL, NULL, NULL, NULL, NULL, 0, ctx);

+    s->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;

+    if ((ret = av_expr_parse_and_eval(&res, (expr = s->h_expr),

+                                      var_names, var_values,

+                                      NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)

+        goto fail;

+    s->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res;

+    /* evaluate again the width, as it may depend on the output height */

+    if ((ret = av_expr_parse_and_eval(&res, (expr = s->w_expr),

+                                      var_names, var_values,

+                                      NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)

+        goto fail;

+    s->w = res;

+

+    w = s->w;

+    h = s->h;

+

+    /* sanity check params */

+    if (w <  -1 || h <  -1) {

+        av_log(ctx, AV_LOG_ERROR, "Size values less than -1 are not acceptable.\n");

+        return AVERROR(EINVAL);

+    }

+    if (w == -1 && h == -1)

+        s->w = s->h = 0;

+

+    if (!(w = s->w))

+        w = inlink->w;

+    if (!(h = s->h))

+        h = inlink->h;

+    if (w == -1)

+        w = av_rescale(h, inlink->w, inlink->h);

+    if (h == -1)

+        h = av_rescale(w, inlink->h, inlink->w);

+

+    if (w > INT_MAX || h > INT_MAX ||

+        (h * inlink->w) > INT_MAX  ||

+        (w * inlink->h) > INT_MAX)

+        av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");

+

+    outlink->w = w;

+    outlink->h = h;

+

+    ret = init_scale_session(ctx, inlink->w, inlink->h, w, h);

+    if (ret < 0)

+        return ret;

+

+    av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d -> w:%d h:%d\n",

+           inlink->w, inlink->h, outlink->w, outlink->h);

+

+    if (inlink->sample_aspect_ratio.num)

+        outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h*inlink->w,

+                                                             outlink->w*inlink->h},

+                                                inlink->sample_aspect_ratio);

+    else

+        outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;

+

+    return 0;

+

+fail:

+    av_log(NULL, AV_LOG_ERROR,

+           "Error when evaluating the expression '%s'\n", expr);

+    return ret;

+}

+

+static int qsvscale_filter_frame(AVFilterLink *link, AVFrame *in)

+{

+    AVFilterContext             *ctx = link->dst;

+    QSVScaleContext               *s = ctx->priv;

+    AVFilterLink            *outlink = ctx->outputs[0];

+

+    mfxSyncPoint sync = NULL;

+    mfxStatus err;

+

+    AVFrame *out = NULL;

+    int ret = 0;

+

+    out = av_frame_alloc();

+    if (!out) {

+        ret = AVERROR(ENOMEM);

+        goto fail;

+    }

+

+    ret = av_hwframe_get_buffer(s->out_frames_ref, out, 0);

+    if (ret < 0)

+        goto fail;

+

+    do {

+        err = MFXVideoVPP_RunFrameVPPAsync(s->session,

+                                           (mfxFrameSurface1*)in->data[3],

+                                           (mfxFrameSurface1*)out->data[3],

+                                           NULL, &sync);

+        if (err == MFX_WRN_DEVICE_BUSY)

+            av_usleep(1);

+    } while (err == MFX_WRN_DEVICE_BUSY);

+

+    if (err < 0 || !sync) {

+        av_log(ctx, AV_LOG_ERROR, "Error during scaling\n");

+        ret = AVERROR_UNKNOWN;

+        goto fail;

+    }

+

+    do {

+        err = MFXVideoCORE_SyncOperation(s->session, sync, 1000);

+    } while (err == MFX_WRN_IN_EXECUTION);

+    if (err < 0) {

+        av_log(ctx, AV_LOG_ERROR, "Error synchronizing the operation: %d\n", err);

+        ret = AVERROR_UNKNOWN;

+        goto fail;

+    }

+

+    ret = av_frame_copy_props(out, in);

+    if (ret < 0)

+        goto fail;

+

+    out->width  = outlink->w;

+    out->height = outlink->h;

+

+    av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,

+              (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,

+              (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,

+              INT_MAX);

+

+    av_frame_free(&in);

+    return ff_filter_frame(outlink, out);

+fail:

+    av_frame_free(&in);

+    av_frame_free(&out);

+    return ret;

+}

+

+#define OFFSET(x) offsetof(QSVScaleContext, x)

+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM

+static const AVOption options[] = {

+    { "w",      "Output video width",  OFFSET(w_expr),     AV_OPT_TYPE_STRING, { .str = "iw"   }, .flags = FLAGS },

+    { "h",      "Output video height", OFFSET(h_expr),     AV_OPT_TYPE_STRING, { .str = "ih"   }, .flags = FLAGS },

+    { "format", "Output pixel format", OFFSET(format_str), AV_OPT_TYPE_STRING, { .str = "same" }, .flags = FLAGS },

+

+    { NULL },

+};

+

+static const AVClass qsvscale_class = {

+    .class_name = "qsvscale",

+    .item_name  = av_default_item_name,

+    .option     = options,

+    .version    = LIBAVUTIL_VERSION_INT,

+};

+

+static const AVFilterPad qsvscale_inputs[] = {

+    {

+        .name         = "default",

+        .type         = AVMEDIA_TYPE_VIDEO,

+        .filter_frame = qsvscale_filter_frame,

+    },

+    { NULL }

+};

+

+static const AVFilterPad qsvscale_outputs[] = {

+    {

+        .name         = "default",

+        .type         = AVMEDIA_TYPE_VIDEO,

+        .config_props = qsvscale_config_props,

+    },

+    { NULL }

+};

+

+AVFilter ff_vf_scale_qsv = {

+    .name      = "scale_qsv",

+    .description = NULL_IF_CONFIG_SMALL("QuickSync video scaling and format conversion"),

+

+    .init          = qsvscale_init,

+    .uninit        = qsvscale_uninit,

+    .query_formats = qsvscale_query_formats,

+

+    .priv_size = sizeof(QSVScaleContext),

+    .priv_class = &qsvscale_class,

+

+    .inputs    = qsvscale_inputs,

+    .outputs   = qsvscale_outputs,

+};