[FFmpeg-cvslog] lavfi/qsvvpp: postpone vpp session initialization

[Haihao Xiang]

ffmpeg | branch: master | Haihao Xiang <haihao.xiang at intel.com> | Mon Jun 12 16:14:47 2023 +0800| [bcdea21675dac424daa4f4b356f1c0d5ac525fdb] | committer: Haihao Xiang

lavfi/qsvvpp: postpone vpp session initialization

So there is a chance to update vpp parameters per frame

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=bcdea21675dac424daa4f4b356f1c0d5ac525fdb
---

 libavfilter/qsvvpp.c | 38 +++++++++++++++++++++++++++++++-------
 libavfilter/qsvvpp.h |  1 +
 2 files changed, 32 insertions(+), 7 deletions(-)

diff --git a/libavfilter/qsvvpp.c b/libavfilter/qsvvpp.c
index d168ab5d1d..f2e8e5fd73 100644
--- a/libavfilter/qsvvpp.c
+++ b/libavfilter/qsvvpp.c
@@ -835,6 +835,7 @@ int ff_qsvvpp_init(AVFilterContext *avctx, QSVVPPParam *param)
     /* Print output memory mode */
     ff_qsvvpp_print_iopattern(avctx, s->vpp_param.IOPattern & 0xF0, "VPP");
 
+    /* Validate VPP params, but don't initial VPP session here */
     ret = MFXVideoVPP_Query(s->session, &s->vpp_param, &s->vpp_param);
     if (ret < 0) {
         ret = ff_qsvvpp_print_error(avctx, ret, "Error querying VPP params");
@@ -842,13 +843,6 @@ int ff_qsvvpp_init(AVFilterContext *avctx, QSVVPPParam *param)
     } else if (ret > 0)
         ff_qsvvpp_print_warning(avctx, ret, "Warning When querying VPP params");
 
-    ret = MFXVideoVPP_Init(s->session, &s->vpp_param);
-    if (ret < 0) {
-        ret = ff_qsvvpp_print_error(avctx, ret, "Failed to create a qsvvpp");
-        goto failed;
-    } else if (ret > 0)
-        ff_qsvvpp_print_warning(avctx, ret, "Warning When creating qsvvpp");
-
     return 0;
 
 failed:
@@ -857,6 +851,31 @@ failed:
     return ret;
 }
 
+static int qsvvpp_init_vpp_session(AVFilterContext *avctx, QSVVPPContext *s)
+{
+    int ret;
+
+    if (s->vpp_initted)
+        return 0;
+
+    /* Query VPP params again, including params for frame */
+    ret = MFXVideoVPP_Query(s->session, &s->vpp_param, &s->vpp_param);
+    if (ret < 0)
+        return ff_qsvvpp_print_error(avctx, ret, "Error querying VPP params");
+    else if (ret > 0)
+        ff_qsvvpp_print_warning(avctx, ret, "Warning When querying VPP params");
+
+    ret = MFXVideoVPP_Init(s->session, &s->vpp_param);
+    if (ret < 0)
+        return ff_qsvvpp_print_error(avctx, ret, "Failed to create a qsvvpp");
+    else if (ret > 0)
+        ff_qsvvpp_print_warning(avctx, ret, "Warning When creating qsvvpp");
+
+    s->vpp_initted = 1;
+
+    return 0;
+}
+
 int ff_qsvvpp_close(AVFilterContext *avctx)
 {
     QSVVPPContext *s = avctx->priv;
@@ -865,6 +884,7 @@ int ff_qsvvpp_close(AVFilterContext *avctx)
         MFXVideoVPP_Close(s->session);
         MFXClose(s->session);
         s->session = NULL;
+        s->vpp_initted = 0;
     }
 
     /* release all the resources */
@@ -920,6 +940,10 @@ int ff_qsvvpp_filter_frame(QSVVPPContext *s, AVFilterLink *inlink, AVFrame *picr
             return AVERROR(ENOMEM);
         }
 
+        ret = qsvvpp_init_vpp_session(ctx, s);
+        if (ret)
+            return ret;
+
         do {
             ret = MFXVideoVPP_RunFrameVPPAsync(s->session, &in_frame->surface,
                                                &out_frame->surface, NULL, &sync);
diff --git a/libavfilter/qsvvpp.h b/libavfilter/qsvvpp.h
index 073c89fe70..fba5f037d4 100644
--- a/libavfilter/qsvvpp.h
+++ b/libavfilter/qsvvpp.h
@@ -90,6 +90,7 @@ typedef struct QSVVPPContext {
     AVFifo *async_fifo;
 
     mfxVersion ver;
+    int vpp_initted;
 } QSVVPPContext;
 
 typedef struct QSVVPPCrop {