[FFmpeg-cvslog] lavfi: add a QSV scaling filter
Anton Khirnov
git at videolan.org
Sat Oct 1 16:21:47 EEST 2016
ffmpeg | branch: master | Anton Khirnov <anton at khirnov.net> | Sat Mar 26 12:39:58 2016 +0100| [ac7bfd69678f3966e38debdb27f4bde94dc0345c] | committer: Anton Khirnov
lavfi: add a QSV scaling filter
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ac7bfd69678f3966e38debdb27f4bde94dc0345c
---
Changelog | 1 +
configure | 1 +
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/version.h | 2 +-
libavfilter/vf_scale_qsv.c | 633 +++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 638 insertions(+), 1 deletion(-)
diff --git a/Changelog b/Changelog
index ac4c725..764cb3a 100644
--- a/Changelog
+++ b/Changelog
@@ -59,6 +59,7 @@ version <next>:
- G.729 raw demuxer
- MagicYUV decoder
- Duck TrueMotion 2.0 Real Time decoder
+- Intel QSV video scaling filter
version 11:
diff --git a/configure b/configure
index 0066cff..1a58a4c 100755
--- a/configure
+++ b/configure
@@ -2409,6 +2409,7 @@ interlace_filter_deps="gpl"
ocv_filter_deps="libopencv"
resample_filter_deps="avresample"
scale_filter_deps="swscale"
+scale_qsv_filter_deps="libmfx"
scale_vaapi_filter_deps="vaapi VAProcPipelineParameterBuffer"
# examples
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index a9bb0a0..21515fe 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -75,6 +75,7 @@ OBJS-$(CONFIG_PAD_FILTER) += vf_pad.o
OBJS-$(CONFIG_PIXDESCTEST_FILTER) += vf_pixdesctest.o
OBJS-$(CONFIG_SCALE_FILTER) += vf_scale.o
OBJS-$(CONFIG_SCALE_NPP_FILTER) += vf_scale_npp.o
+OBJS-$(CONFIG_SCALE_QSV_FILTER) += vf_scale_qsv.o
OBJS-$(CONFIG_SCALE_VAAPI_FILTER) += vf_scale_vaapi.o
OBJS-$(CONFIG_SELECT_FILTER) += vf_select.o
OBJS-$(CONFIG_SETDAR_FILTER) += vf_aspect.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index c6eeb1f..e3858d8 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -98,6 +98,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(PIXDESCTEST, pixdesctest, 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(SELECT, select, vf);
REGISTER_FILTER(SETDAR, setdar, vf);
diff --git a/libavfilter/version.h b/libavfilter/version.h
index c8102dd..e91c6e2 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -30,7 +30,7 @@
#include "libavutil/version.h"
#define LIBAVFILTER_VERSION_MAJOR 6
-#define LIBAVFILTER_VERSION_MINOR 4
+#define LIBAVFILTER_VERSION_MINOR 5
#define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
diff --git a/libavfilter/vf_scale_qsv.c b/libavfilter/vf_scale_qsv.c
new file mode 100644
index 0000000..e5c3da5
--- /dev/null
+++ b/libavfilter/vf_scale_qsv.c
@@ -0,0 +1,633 @@
+/*
+ * 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
+ */
+
+/**
+ * @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);
+
+ ff_set_common_formats(ctx, pix_fmts);
+
+ 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,
+};
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