[FFmpeg-devel] [PATCH 01/11] avcodec/vvcdec: thread, ensure the parse stage gets the highest priority

[Nuo Mi <nuomi2021@gmail.com>]

The parser stage is not parallelizable.
We need to schedule it as soon as possible to create later stages, which are more parallelizable

clips                                       | before | after | delta
--------------------------------------------|--------|-------|------
RitualDance_1920x1080_60_10_420_37_RA.266   | 342.7  | 365.3 |  6.59%
NovosobornayaSquare_1920x1080.bin           | 321.7  | 400   | 24.34%
Tango2_3840x2160_60_10_420_27_LD.266        |  82.3  |  91.7 | 11.42%
RitualDance_1920x1080_60_10_420_32_LD.266   | 323.7  | 319.3 | -1.36%
Chimera_8bit_1080P_1000_frames.vvc          | 364    | 411.3 | 12.99%
BQTerrace_1920x1080_60_10_420_22_RA.vvc     | 162.7  | 185.7 | 14.14%
---
 libavcodec/vvc/thread.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libavcodec/vvc/thread.c b/libavcodec/vvc/thread.c
index 8dd9a36fd5..28065d726f 100644
--- a/libavcodec/vvc/thread.c
+++ b/libavcodec/vvc/thread.c
@@ -385,14 +385,15 @@ static int task_priority_higher(const AVTask *_a, const AVTask *_b)
     const VVCTask *a = (const VVCTask*)_a;
     const VVCTask *b = (const VVCTask*)_b;
 
-    CHECK(a->fc->decode_order, b->fc->decode_order);             //decode order
 
-    if (a->stage == VVC_TASK_STAGE_PARSE || b->stage == VVC_TASK_STAGE_PARSE) {
+    if (a->stage <= VVC_TASK_STAGE_PARSE || b->stage <= VVC_TASK_STAGE_PARSE) {
         CHECK(a->stage, b->stage);
+        CHECK(a->fc->decode_order, b->fc->decode_order);           //decode order
         CHECK(a->ry, b->ry);
         return a->rx < b->rx;
     }
 
+    CHECK(a->fc->decode_order, b->fc->decode_order);              //decode order
     CHECK(a->rx + a->ry + a->stage, b->rx + b->ry + b->stage);    //zigzag with type
     CHECK(a->rx + a->ry, b->rx + b->ry);                          //zigzag
     return a->ry < b->ry;
-- 
2.34.1

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