[FFmpeg-devel] [PATCH 02/16] configure, avutil: add support for HorizonOS

[averne <averne381@gmail.com>]

HorizonOS (HOS) is the operating system of the Nintendo Switch.
This patch enables integration with the homebrew toolchain developped by the devkitPro team. Its two main components are devkitA64 (common toolchain for aarch64 targets) and libnx (library implementing interaction with the HOS kernel and system daemons, termed sysmodules).

Signed-off-by: averne <averne381@gmail.com>
---
 configure       | 8 ++++++++
 libavutil/cpu.c | 7 +++++++
 2 files changed, 15 insertions(+)

diff --git a/configure b/configure
index 96b181fd21..09fb2aed1b 100755
--- a/configure
+++ b/configure
@@ -5967,6 +5967,10 @@ case $target_os in
         ;;
     minix)
         ;;
+    horizon)
+        enable section_data_rel_ro
+        add_extralibs -lnx
+        ;;
     none)
         ;;
     *)
@@ -7710,6 +7714,10 @@ haiku)
         disable memalign
     fi
     ;;
+horizon)
+    disable sysctl
+    disable sysctlbyname
+    ;;
 esac
 
 flatten_extralibs(){
diff --git a/libavutil/cpu.c b/libavutil/cpu.c
index 9ac2f01c20..6a77df5e34 100644
--- a/libavutil/cpu.c
+++ b/libavutil/cpu.c
@@ -48,6 +48,9 @@
 #if HAVE_UNISTD_H
 #include <unistd.h>
 #endif
+#ifdef __SWITCH__
+#include <switch.h>
+#endif
 
 static atomic_int cpu_flags = -1;
 static atomic_int cpu_count = -1;
@@ -247,6 +250,10 @@ int av_cpu_count(void)
 #elif HAVE_WINRT
     GetNativeSystemInfo(&sysinfo);
     nb_cpus = sysinfo.dwNumberOfProcessors;
+#elif defined(__SWITCH__)
+    u64 core_mask = 0;
+    Result rc = svcGetInfo(&core_mask, InfoType_CoreMask, CUR_PROCESS_HANDLE, 0);
+    nb_cpus = R_SUCCEEDED(rc) ? av_popcount64(core_mask) : 3;
 #endif
 
     if (!atomic_exchange_explicit(&printed, 1, memory_order_relaxed))
-- 
2.45.1

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