Remove WebM support (and deps libvpx and opus)

We've had many issues with WebM support and specifically the libvpx library
over the years, mostly due to its poor integration in Godot's buildsystem,
but without anyone really interested in improving this state.

With the new GDExtensions in Godot 4.0, we intend to move video decoding to
first-party extensions, and this would likely be done using something like
libvlc to expose more codecs.

Removing the `webm` module means we can remove libsimplewebm, libvpx and
opus, which we were only used for that purpose. Both libvpx and opus were
fairly complex pieces of the buildsystem, so this is a nice cleanup.

This also removes the compile-time dependency on `yasm`.

Fixes lots of compilation or non-working WebM issues which will be linked
in the PR.

1 files changed, 0 insertions, 106 deletions

diff --git a/thirdparty/libvpx/vp8/common/generic/systemdependent.c b/thirdparty/libvpx/vp8/common/generic/systemdependent.c
deleted file mode 100644
index 6d5f302d7a..0000000000
--- a/thirdparty/libvpx/vp8/common/generic/systemdependent.c
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-
-#include "vpx_config.h"
-#include "vp8_rtcd.h"
-#if ARCH_ARM
-#include "vpx_ports/arm.h"
-#elif ARCH_X86 || ARCH_X86_64
-#include "vpx_ports/x86.h"
-#endif
-#include "vp8/common/onyxc_int.h"
-#include "vp8/common/systemdependent.h"
-
-#if CONFIG_MULTITHREAD
-#if HAVE_UNISTD_H && !defined(__OS2__)
-#include <unistd.h>
-#elif defined(_WIN32)
-#include <windows.h>
-typedef void (WINAPI *PGNSI)(LPSYSTEM_INFO);
-#elif defined(__OS2__)
-#define INCL_DOS
-#define INCL_DOSSPINLOCK
-#include <os2.h>
-#endif
-#endif
-
-#if CONFIG_MULTITHREAD
-static int get_cpu_count()
-{
-    int core_count = 16;
-
-#if HAVE_UNISTD_H && !defined(__OS2__)
-#if defined(_SC_NPROCESSORS_ONLN)
-    core_count = sysconf(_SC_NPROCESSORS_ONLN);
-#elif defined(_SC_NPROC_ONLN)
-    core_count = sysconf(_SC_NPROC_ONLN);
-#endif
-#elif defined(_WIN32)
-    {
-#if _WIN32_WINNT >= 0x0501
-        SYSTEM_INFO sysinfo;
-        GetNativeSystemInfo(&sysinfo);
-#else
-        PGNSI pGNSI;
-        SYSTEM_INFO sysinfo;
-
-        /* Call GetNativeSystemInfo if supported or
-         * GetSystemInfo otherwise. */
-
-        pGNSI = (PGNSI) GetProcAddress(
-                GetModuleHandle(TEXT("kernel32.dll")), "GetNativeSystemInfo");
-        if (pGNSI != NULL)
-            pGNSI(&sysinfo);
-        else
-            GetSystemInfo(&sysinfo);
-#endif
-
-        core_count = sysinfo.dwNumberOfProcessors;
-    }
-#elif defined(__OS2__)
-    {
-        ULONG proc_id;
-        ULONG status;
-
-        core_count = 0;
-        for (proc_id = 1; ; proc_id++)
-        {
-            if (DosGetProcessorStatus(proc_id, &status))
-                break;
-
-            if (status == PROC_ONLINE)
-                core_count++;
-        }
-    }
-#else
-    /* other platforms */
-#endif
-
-    return core_count > 0 ? core_count : 1;
-}
-#endif
-
-void vp8_clear_system_state_c() {};
-
-void vp8_machine_specific_config(VP8_COMMON *ctx)
-{
-#if CONFIG_MULTITHREAD
-    ctx->processor_core_count = get_cpu_count();
-#else
-    (void)ctx;
-#endif /* CONFIG_MULTITHREAD */
-
-#if ARCH_ARM
-    ctx->cpu_caps = arm_cpu_caps();
-#elif ARCH_X86 || ARCH_X86_64
-    ctx->cpu_caps = x86_simd_caps();
-#endif
-}