Experiments with hw decoding

Portisch · 28 July 2021 10:22

Kodi do send frames to the hardware decoder, not a stream.

Amlogic introduced the multi decoder to decode multiple streams parallel in hardware. Currently it’s possible to decode up to 9 different media streams simultaneous. This mean it’s possible to feed up to 9 different videos on one screen, all hardware decoded.

It was needed to limit it to one stream as Kodi is not designed to handle more than one stream:

github.com

CoreELEC/CoreELEC/blob/coreelec-19/projects/Amlogic-ce/packages/linux-drivers/amlogic/media_modules-aml/patches/003-multi-decoders-limit-maximum-number-of-decoder.patch

From b99d31bfbc2cc973355ab5541908f0ee820b24fa Mon Sep 17 00:00:00 2001
From: Portisch <hugo.portisch@yahoo.de>
Date: Fri, 27 Dec 2019 20:11:58 +0100
Subject: [PATCH] multi decoders: limit maximum number of decoder in parallel
 to 1   Kodi can only handle one decoder (12/2019). Because of threading
 issues in Kodi   it is needed to limit the multi decoder instances to a
 maximum of 1.   If Kodi do implement multiple decoder support in parallel
 this decoder limit   needs to be reverted.

---
 drivers/frame_provider/decoder/utils/vdec.h         | 2 +-
 drivers/frame_provider/decoder/utils/vdec_profile.c | 2 --
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/frame_provider/decoder/utils/vdec.h b/drivers/frame_provider/decoder/utils/vdec.h
index 18d7cd1..56f044a 100644
--- a/drivers/frame_provider/decoder/utils/vdec.h
+++ b/drivers/frame_provider/decoder/utils/vdec.h
@@ -45,7 +45,7 @@ struct device *get_vdec_device(void);
 int vdec_module_init(void);

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