The session for hwupload & hwdownload is used to copy data between
system and video memory, 2 threads are sufficient for the copy in the
SDK.
---
libavutil/hwcontext_qsv.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/libavutil/hwcontext_qsv.c b/libavutil/hwcontext_qsv.c
index 84cf5015ff..5dbe2b1701 100644
--- a/libavutil/hwcontext_qsv.c
+++ b/libavutil/hwcontext_qsv.c
@@ -456,8 +456,25 @@ static int qsv_init_internal_session(AVHWFramesContext
*ctx,
mfxVideoParam par;
mfxStatus err;
+ mfxInitParam init_par = { MFX_IMPL_AUTO_ANY };
- err = MFXInit(device_priv->impl, &device_priv->ver, session);
+#if QSV_VERSION_ATLEAST(1, 15)
+ mfxExtBuffer *ext_params[1];
+ mfxExtThreadsParam thread_param;
+
+ memset(&thread_param, 0, sizeof(thread_param));
+ thread_param.Header.BufferId = MFX_EXTBUFF_THREADS_PARAM;
+ thread_param.Header.BufferSz = sizeof(thread_param);
+ thread_param.NumThread = 2;
+ ext_params[0] = (mfxExtBuffer *)&thread_param;
+ init_par.ExtParam = (mfxExtBuffer **)&ext_params;
+ init_par.NumExtParam = 1;
+#endif
+
+ init_par.Implementation = device_priv->impl;
+ init_par.Version = device_priv->ver;
+
+ err = MFXInitEx(init_par, session);
if (err != MFX_ERR_NONE) {
av_log(ctx, AV_LOG_ERROR, "Error initializing an internal session\n");
return AVERROR_UNKNOWN;
--
2.25.1
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