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, 157 deletions

diff --git a/thirdparty/opus/celt/x86/x86cpu.c b/thirdparty/opus/celt/x86/x86cpu.c
deleted file mode 100644
index 080eb25e41..0000000000
--- a/thirdparty/opus/celt/x86/x86cpu.c
+++ /dev/null
@@ -1,157 +0,0 @@
-/* Copyright (c) 2014, Cisco Systems, INC
-   Written by XiangMingZhu WeiZhou MinPeng YanWang
-
-   Redistribution and use in source and binary forms, with or without
-   modification, are permitted provided that the following conditions
-   are met:
-
-   - Redistributions of source code must retain the above copyright
-   notice, this list of conditions and the following disclaimer.
-
-   - Redistributions in binary form must reproduce the above copyright
-   notice, this list of conditions and the following disclaimer in the
-   documentation and/or other materials provided with the distribution.
-
-   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "cpu_support.h"
-#include "macros.h"
-#include "main.h"
-#include "pitch.h"
-#include "x86cpu.h"
-
-#if (defined(OPUS_X86_MAY_HAVE_SSE) && !defined(OPUS_X86_PRESUME_SSE)) || \
-  (defined(OPUS_X86_MAY_HAVE_SSE2) && !defined(OPUS_X86_PRESUME_SSE2)) || \
-  (defined(OPUS_X86_MAY_HAVE_SSE4_1) && !defined(OPUS_X86_PRESUME_SSE4_1)) || \
-  (defined(OPUS_X86_MAY_HAVE_AVX) && !defined(OPUS_X86_PRESUME_AVX))
-
-
-#if defined(_MSC_VER)
-
-#include <intrin.h>
-static _inline void cpuid(unsigned int CPUInfo[4], unsigned int InfoType)
-{
-    __cpuid((int*)CPUInfo, InfoType);
-}
-
-#else
-
-#if defined(CPU_INFO_BY_C)
-#include <cpuid.h>
-#endif
-
-static void cpuid(unsigned int CPUInfo[4], unsigned int InfoType)
-{
-#if defined(CPU_INFO_BY_ASM)
-#if defined(__i386__) && defined(__PIC__)
-/* %ebx is PIC register in 32-bit, so mustn't clobber it. */
-    __asm__ __volatile__ (
-        "xchg %%ebx, %1\n"
-        "cpuid\n"
-        "xchg %%ebx, %1\n":
-        "=a" (CPUInfo[0]),
-        "=r" (CPUInfo[1]),
-        "=c" (CPUInfo[2]),
-        "=d" (CPUInfo[3]) :
-        "0" (InfoType)
-    );
-#else
-    __asm__ __volatile__ (
-        "cpuid":
-        "=a" (CPUInfo[0]),
-        "=b" (CPUInfo[1]),
-        "=c" (CPUInfo[2]),
-        "=d" (CPUInfo[3]) :
-        "0" (InfoType)
-    );
-#endif
-#elif defined(CPU_INFO_BY_C)
-    __get_cpuid(InfoType, &(CPUInfo[0]), &(CPUInfo[1]), &(CPUInfo[2]), &(CPUInfo[3]));
-#endif
-}
-
-#endif
-
-typedef struct CPU_Feature{
-    /*  SIMD: 128-bit */
-    int HW_SSE;
-    int HW_SSE2;
-    int HW_SSE41;
-    /*  SIMD: 256-bit */
-    int HW_AVX;
-} CPU_Feature;
-
-static void opus_cpu_feature_check(CPU_Feature *cpu_feature)
-{
-    unsigned int info[4] = {0};
-    unsigned int nIds = 0;
-
-    cpuid(info, 0);
-    nIds = info[0];
-
-    if (nIds >= 1){
-        cpuid(info, 1);
-        cpu_feature->HW_SSE = (info[3] & (1 << 25)) != 0;
-        cpu_feature->HW_SSE2 = (info[3] & (1 << 26)) != 0;
-        cpu_feature->HW_SSE41 = (info[2] & (1 << 19)) != 0;
-        cpu_feature->HW_AVX = (info[2] & (1 << 28)) != 0;
-    }
-    else {
-        cpu_feature->HW_SSE = 0;
-        cpu_feature->HW_SSE2 = 0;
-        cpu_feature->HW_SSE41 = 0;
-        cpu_feature->HW_AVX = 0;
-    }
-}
-
-int opus_select_arch(void)
-{
-    CPU_Feature cpu_feature;
-    int arch;
-
-    opus_cpu_feature_check(&cpu_feature);
-
-    arch = 0;
-    if (!cpu_feature.HW_SSE)
-    {
-       return arch;
-    }
-    arch++;
-
-    if (!cpu_feature.HW_SSE2)
-    {
-       return arch;
-    }
-    arch++;
-
-    if (!cpu_feature.HW_SSE41)
-    {
-        return arch;
-    }
-    arch++;
-
-    if (!cpu_feature.HW_AVX)
-    {
-        return arch;
-    }
-    arch++;
-
-    return arch;
-}
-
-#endif