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, 151 deletions

diff --git a/thirdparty/opus/celt/arm/fixed_armv5e.h b/thirdparty/opus/celt/arm/fixed_armv5e.h
deleted file mode 100644
index 36a6321101..0000000000
--- a/thirdparty/opus/celt/arm/fixed_armv5e.h
+++ /dev/null
@@ -1,151 +0,0 @@
-/* Copyright (C) 2007-2009 Xiph.Org Foundation
-   Copyright (C) 2003-2008 Jean-Marc Valin
-   Copyright (C) 2007-2008 CSIRO
-   Copyright (C) 2013      Parrot */
-/*
-   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.
-*/
-
-#ifndef FIXED_ARMv5E_H
-#define FIXED_ARMv5E_H
-
-#include "fixed_armv4.h"
-
-/** 16x32 multiplication, followed by a 16-bit shift right. Results fits in 32 bits */
-#undef MULT16_32_Q16
-static OPUS_INLINE opus_val32 MULT16_32_Q16_armv5e(opus_val16 a, opus_val32 b)
-{
-  int res;
-  __asm__(
-      "#MULT16_32_Q16\n\t"
-      "smulwb %0, %1, %2\n\t"
-      : "=r"(res)
-      : "r"(b),"r"(a)
-  );
-  return res;
-}
-#define MULT16_32_Q16(a, b) (MULT16_32_Q16_armv5e(a, b))
-
-
-/** 16x32 multiplication, followed by a 15-bit shift right. Results fits in 32 bits */
-#undef MULT16_32_Q15
-static OPUS_INLINE opus_val32 MULT16_32_Q15_armv5e(opus_val16 a, opus_val32 b)
-{
-  int res;
-  __asm__(
-      "#MULT16_32_Q15\n\t"
-      "smulwb %0, %1, %2\n\t"
-      : "=r"(res)
-      : "r"(b), "r"(a)
-  );
-  return res<<1;
-}
-#define MULT16_32_Q15(a, b) (MULT16_32_Q15_armv5e(a, b))
-
-
-/** 16x32 multiply, followed by a 15-bit shift right and 32-bit add.
-    b must fit in 31 bits.
-    Result fits in 32 bits. */
-#undef MAC16_32_Q15
-static OPUS_INLINE opus_val32 MAC16_32_Q15_armv5e(opus_val32 c, opus_val16 a,
- opus_val32 b)
-{
-  int res;
-  __asm__(
-      "#MAC16_32_Q15\n\t"
-      "smlawb %0, %1, %2, %3;\n"
-      : "=r"(res)
-      : "r"(b<<1), "r"(a), "r"(c)
-  );
-  return res;
-}
-#define MAC16_32_Q15(c, a, b) (MAC16_32_Q15_armv5e(c, a, b))
-
-/** 16x32 multiply, followed by a 16-bit shift right and 32-bit add.
-    Result fits in 32 bits. */
-#undef MAC16_32_Q16
-static OPUS_INLINE opus_val32 MAC16_32_Q16_armv5e(opus_val32 c, opus_val16 a,
- opus_val32 b)
-{
-  int res;
-  __asm__(
-      "#MAC16_32_Q16\n\t"
-      "smlawb %0, %1, %2, %3;\n"
-      : "=r"(res)
-      : "r"(b), "r"(a), "r"(c)
-  );
-  return res;
-}
-#define MAC16_32_Q16(c, a, b) (MAC16_32_Q16_armv5e(c, a, b))
-
-/** 16x16 multiply-add where the result fits in 32 bits */
-#undef MAC16_16
-static OPUS_INLINE opus_val32 MAC16_16_armv5e(opus_val32 c, opus_val16 a,
- opus_val16 b)
-{
-  int res;
-  __asm__(
-      "#MAC16_16\n\t"
-      "smlabb %0, %1, %2, %3;\n"
-      : "=r"(res)
-      : "r"(a), "r"(b), "r"(c)
-  );
-  return res;
-}
-#define MAC16_16(c, a, b) (MAC16_16_armv5e(c, a, b))
-
-/** 16x16 multiplication where the result fits in 32 bits */
-#undef MULT16_16
-static OPUS_INLINE opus_val32 MULT16_16_armv5e(opus_val16 a, opus_val16 b)
-{
-  int res;
-  __asm__(
-      "#MULT16_16\n\t"
-      "smulbb %0, %1, %2;\n"
-      : "=r"(res)
-      : "r"(a), "r"(b)
-  );
-  return res;
-}
-#define MULT16_16(a, b) (MULT16_16_armv5e(a, b))
-
-#ifdef OPUS_ARM_INLINE_MEDIA
-
-#undef SIG2WORD16
-static OPUS_INLINE opus_val16 SIG2WORD16_armv6(opus_val32 x)
-{
-   celt_sig res;
-   __asm__(
-       "#SIG2WORD16\n\t"
-       "ssat %0, #16, %1, ASR #12\n\t"
-       : "=r"(res)
-       : "r"(x+2048)
-   );
-   return EXTRACT16(res);
-}
-#define SIG2WORD16(x) (SIG2WORD16_armv6(x))
-
-#endif /* OPUS_ARM_INLINE_MEDIA */
-
-#endif