fix(amfenc): stop busy waiting for encoder output (#350)

.github/workflows/build-ffmpeg.yml

@@ -309,6 +309,7 @@ jobs:
           git apply -v --ignore-whitespace ../../ffmpeg_patches/ffmpeg/04-mfenc-lowlatency.patch
           git apply -v --ignore-whitespace ../../ffmpeg_patches/ffmpeg/05-amfenc-new-av1-usages.patch
           git apply -v --ignore-whitespace ../../ffmpeg_patches/ffmpeg/06-vaapi-customized-surface-alignment.patch
+          git apply -v --ignore-whitespace ../../ffmpeg_patches/ffmpeg/07-amfenc-query-timeout.patch
 
       - name: Setup cross compilation
         id: cross

ffmpeg_patches/ffmpeg/07-amfenc-query-timeout.patch

@@ -0,0 +1,53 @@
+From df5d0203200337f9472b729dfb9a1eb9442971c3 Mon Sep 17 00:00:00 2001
+From: Cameron Gutman <aicommander@gmail.com>
+Date: Mon, 2 Sep 2024 16:57:36 -0500
+Subject: [PATCH] amfenc: Use QUERY_TIMEOUT feature to avoid busy looping
+
+---
+ libavcodec/amfenc_av1.c  | 2 ++
+ libavcodec/amfenc_h264.c | 2 ++
+ libavcodec/amfenc_hevc.c | 2 ++
+ 3 files changed, 6 insertions(+)
+
+diff --git a/libavcodec/amfenc_av1.c b/libavcodec/amfenc_av1.c
+index c4e9f45e87..5102db2068 100644
+--- a/libavcodec/amfenc_av1.c
++++ b/libavcodec/amfenc_av1.c
+@@ -196,6 +196,8 @@ FF_ENABLE_DEPRECATION_WARNINGS
+
+     AMF_ASSIGN_PROPERTY_RATE(res, ctx->encoder, AMF_VIDEO_ENCODER_AV1_FRAMERATE, framerate);
+
++    AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder, AMF_VIDEO_ENCODER_AV1_QUERY_TIMEOUT, 50);
++
+     switch (avctx->profile) {
+     case AV_PROFILE_AV1_MAIN:
+         profile = AMF_VIDEO_ENCODER_AV1_PROFILE_MAIN;
+diff --git a/libavcodec/amfenc_h264.c b/libavcodec/amfenc_h264.c
+index d3c6f6a10b..d94644bd85 100644
+--- a/libavcodec/amfenc_h264.c
++++ b/libavcodec/amfenc_h264.c
+@@ -225,6 +225,8 @@ FF_ENABLE_DEPRECATION_WARNINGS
+
+     AMF_ASSIGN_PROPERTY_RATE(res, ctx->encoder, AMF_VIDEO_ENCODER_FRAMERATE, framerate);
+
++    AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder, AMF_VIDEO_ENCODER_QUERY_TIMEOUT, 50);
++
+     switch (avctx->profile) {
+     case AV_PROFILE_H264_BASELINE:
+         profile = AMF_VIDEO_ENCODER_PROFILE_BASELINE;
+diff --git a/libavcodec/amfenc_hevc.c b/libavcodec/amfenc_hevc.c
+index c0da0f08b2..4b9e419b74 100644
+--- a/libavcodec/amfenc_hevc.c
++++ b/libavcodec/amfenc_hevc.c
+@@ -187,6 +187,8 @@ FF_ENABLE_DEPRECATION_WARNINGS
+
+     AMF_ASSIGN_PROPERTY_RATE(res, ctx->encoder, AMF_VIDEO_ENCODER_HEVC_FRAMERATE, framerate);
+
++    AMF_ASSIGN_PROPERTY_INT64(res, ctx->encoder, AMF_VIDEO_ENCODER_HEVC_QUERY_TIMEOUT, 50);
++
+     color_depth = AMF_COLOR_BIT_DEPTH_8;
+     switch (avctx->profile) {
+     case AV_PROFILE_HEVC_MAIN:
+-- 
+2.43.0.windows.1
+