[FFmpeg-cvslog] avfilter/vpp_qsv: fix regression on older api versions (e.g. 1.11)

[softworkz]

ffmpeg | branch: master | softworkz <softworkz at hotmail.com> | Fri Jan  7 07:01:31 2022 +0000| [479f3c65986fca0ccf56f4dadb5a5b167f466fc7] | committer: Haihao Xiang

avfilter/vpp_qsv: fix regression on older api versions (e.g. 1.11)

Commit 8b83dad82512a6948b63408f964463b063ad24c9 introduced a
regression in a way that scaling via vpp_qsv doesn't work any longer
for devices with an MSDK runtime version lower than 1.19. This is true
for older CPUs which are stuck at 1.11.
The commit added checks for the compile-sdk version but it didn't test
for the runtime version.

Signed-off-by: softworkz <softworkz at hotmail.com>
Signed-off-by: Haihao Xiang <haihao.xiang at intel.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=479f3c65986fca0ccf56f4dadb5a5b167f466fc7
---

 libavfilter/vf_vpp_qsv.c | 59 ++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 47 insertions(+), 12 deletions(-)

diff --git a/libavfilter/vf_vpp_qsv.c b/libavfilter/vf_vpp_qsv.c
index ab58a5777e..5c96703fd3 100644
--- a/libavfilter/vf_vpp_qsv.c
+++ b/libavfilter/vf_vpp_qsv.c
@@ -26,6 +26,7 @@
 #include "libavutil/opt.h"
 #include "libavutil/eval.h"
 #include "libavutil/hwcontext.h"
+#include "libavutil/hwcontext_qsv.h"
 #include "libavutil/pixdesc.h"
 #include "libavutil/mathematics.h"
 
@@ -139,8 +140,9 @@ static const AVOption options[] = {
     { "height", "Output video height", OFFSET(oh), AV_OPT_TYPE_STRING, { .str="w*ch/cw" }, 0, 255, .flags = FLAGS },
     { "format", "Output pixel format", OFFSET(output_format_str), AV_OPT_TYPE_STRING, { .str = "same" }, .flags = FLAGS },
     { "async_depth", "Internal parallelization depth, the higher the value the higher the latency.", OFFSET(async_depth), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
+#ifdef QSV_HAVE_SCALING_CONFIG
     { "scale_mode", "scale mode: 0=auto, 1=low power, 2=high quality", OFFSET(scale_mode), AV_OPT_TYPE_INT, { .i64 = MFX_SCALING_MODE_DEFAULT }, MFX_SCALING_MODE_DEFAULT, MFX_SCALING_MODE_QUALITY, .flags = FLAGS, "scale mode" },
-
+#endif
     { NULL }
 };
 
@@ -297,6 +299,32 @@ static int config_input(AVFilterLink *inlink)
     return 0;
 }
 
+static mfxStatus get_mfx_version(const AVFilterContext *ctx, mfxVersion *mfx_version)
+{
+    const AVFilterLink *inlink = ctx->inputs[0];
+    AVBufferRef *device_ref;
+    AVHWDeviceContext *device_ctx;
+    AVQSVDeviceContext *device_hwctx;
+
+    if (inlink->hw_frames_ctx) {
+        AVHWFramesContext *frames_ctx = (AVHWFramesContext *)inlink->hw_frames_ctx->data;
+        device_ref = frames_ctx->device_ref;
+    } else if (ctx->hw_device_ctx) {
+        device_ref = ctx->hw_device_ctx;
+    } else {
+        // Unavailable hw context doesn't matter in pass-through mode,
+        // so don't error here but let runtime version checks fail by setting to 0.0
+        mfx_version->Major = 0;
+        mfx_version->Minor = 0;
+        return MFX_ERR_NONE;
+    }
+
+    device_ctx   = (AVHWDeviceContext *)device_ref->data;
+    device_hwctx = device_ctx->hwctx;
+
+    return MFXQueryVersion(device_hwctx->session, mfx_version);
+}
+
 static int config_output(AVFilterLink *outlink)
 {
     AVFilterContext *ctx = outlink->src;
@@ -304,6 +332,7 @@ static int config_output(AVFilterLink *outlink)
     QSVVPPParam     param = { NULL };
     QSVVPPCrop      crop  = { 0 };
     mfxExtBuffer    *ext_buf[ENH_FILTERS_COUNT];
+    mfxVersion      mfx_version;
     AVFilterLink    *inlink = ctx->inputs[0];
     enum AVPixelFormat in_format;
 
@@ -317,6 +346,11 @@ static int config_output(AVFilterLink *outlink)
     param.ext_buf       = ext_buf;
     param.async_depth   = vpp->async_depth;
 
+    if (get_mfx_version(ctx, &mfx_version) != MFX_ERR_NONE) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to query mfx version.\n");
+        return AVERROR(EINVAL);
+    }
+
     if (inlink->format == AV_PIX_FMT_QSV) {
          if (!inlink->hw_frames_ctx || !inlink->hw_frames_ctx->data)
              return AVERROR(EINVAL);
@@ -467,19 +501,20 @@ static int config_output(AVFilterLink *outlink)
 #endif
     }
 
-    if (inlink->w != outlink->w || inlink->h != outlink->h) {
 #ifdef QSV_HAVE_SCALING_CONFIG
-        memset(&vpp->scale_conf, 0, sizeof(mfxExtVPPScaling));
-        vpp->scale_conf.Header.BufferId    = MFX_EXTBUFF_VPP_SCALING;
-        vpp->scale_conf.Header.BufferSz    = sizeof(mfxExtVPPScaling);
-        vpp->scale_conf.ScalingMode        = vpp->scale_mode;
-
-        param.ext_buf[param.num_ext_buf++] = (mfxExtBuffer*)&vpp->scale_conf;
-#else
-        av_log(ctx, AV_LOG_WARNING, "The QSV VPP Scale option is "
-            "not supported with this MSDK version.\n");
-#endif
+    if (inlink->w != outlink->w || inlink->h != outlink->h) {
+        if (QSV_RUNTIME_VERSION_ATLEAST(mfx_version, 1, 19)) {
+            memset(&vpp->scale_conf, 0, sizeof(mfxExtVPPScaling));
+            vpp->scale_conf.Header.BufferId    = MFX_EXTBUFF_VPP_SCALING;
+            vpp->scale_conf.Header.BufferSz    = sizeof(mfxExtVPPScaling);
+            vpp->scale_conf.ScalingMode        = vpp->scale_mode;
+
+            param.ext_buf[param.num_ext_buf++] = (mfxExtBuffer*)&vpp->scale_conf;
+        } else
+            av_log(ctx, AV_LOG_WARNING, "The QSV VPP Scale option is "
+                "not supported with this MSDK version.\n");
     }
+#endif
 
     if (vpp->use_frc || vpp->use_crop || vpp->deinterlace || vpp->denoise ||
         vpp->detail || vpp->procamp || vpp->rotate || vpp->hflip ||