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, 70 deletions

diff --git a/thirdparty/libvpx/vp8/common/invtrans.h b/thirdparty/libvpx/vp8/common/invtrans.h
deleted file mode 100644
index 9cfea8d513..0000000000
--- a/thirdparty/libvpx/vp8/common/invtrans.h
+++ /dev/null
@@ -1,70 +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.
- */
-
-
-#ifndef VP8_COMMON_INVTRANS_H_
-#define VP8_COMMON_INVTRANS_H_
-
-#include "./vpx_config.h"
-#include "vp8_rtcd.h"
-#include "blockd.h"
-#include "onyxc_int.h"
-
-#if CONFIG_MULTITHREAD
-#include "vpx_mem/vpx_mem.h"
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-static void eob_adjust(char *eobs, short *diff)
-{
-    /* eob adjust.... the idct can only skip if both the dc and eob are zero */
-    int js;
-    for(js = 0; js < 16; js++)
-    {
-        if((eobs[js] == 0) && (diff[0] != 0))
-            eobs[js]++;
-        diff+=16;
-    }
-}
-
-static INLINE void vp8_inverse_transform_mby(MACROBLOCKD *xd)
-{
-    short *DQC = xd->dequant_y1;
-
-    if (xd->mode_info_context->mbmi.mode != SPLITMV)
-    {
-        /* do 2nd order transform on the dc block */
-        if (xd->eobs[24] > 1)
-        {
-            vp8_short_inv_walsh4x4
-                (&xd->block[24].dqcoeff[0], xd->qcoeff);
-        }
-        else
-        {
-            vp8_short_inv_walsh4x4_1
-                (&xd->block[24].dqcoeff[0], xd->qcoeff);
-        }
-        eob_adjust(xd->eobs, xd->qcoeff);
-
-        DQC = xd->dequant_y1_dc;
-    }
-    vp8_dequant_idct_add_y_block
-                    (xd->qcoeff, DQC,
-                     xd->dst.y_buffer,
-                     xd->dst.y_stride, xd->eobs);
-}
-#ifdef __cplusplus
-}  // extern "C"
-#endif
-
-#endif  // VP8_COMMON_INVTRANS_H_