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, 54 deletions

diff --git a/thirdparty/libvpx/rtcd/vp9_rtcd_arm.h b/thirdparty/libvpx/rtcd/vp9_rtcd_arm.h
deleted file mode 100644
index afdc7e179e..0000000000
--- a/thirdparty/libvpx/rtcd/vp9_rtcd_arm.h
+++ /dev/null
@@ -1,54 +0,0 @@
-#ifndef VP9_RTCD_H_
-#define VP9_RTCD_H_
-
-#ifdef RTCD_C
-#define RTCD_EXTERN
-#else
-#define RTCD_EXTERN extern
-#endif
-
-/*
- * VP9
- */
-
-#include "vp9/common/vp9_common.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-void vp9_iht16x16_256_add_c(const tran_low_t *input, uint8_t *output, int pitch, int tx_type);
-#define vp9_iht16x16_256_add vp9_iht16x16_256_add_c
-
-void vp9_iht4x4_16_add_c(const tran_low_t *input, uint8_t *dest, int dest_stride, int tx_type);
-void vp9_iht4x4_16_add_neon(const tran_low_t *input, uint8_t *dest, int dest_stride, int tx_type);
-RTCD_EXTERN void (*vp9_iht4x4_16_add)(const tran_low_t *input, uint8_t *dest, int dest_stride, int tx_type);
-
-void vp9_iht8x8_64_add_c(const tran_low_t *input, uint8_t *dest, int dest_stride, int tx_type);
-void vp9_iht8x8_64_add_neon(const tran_low_t *input, uint8_t *dest, int dest_stride, int tx_type);
-RTCD_EXTERN void (*vp9_iht8x8_64_add)(const tran_low_t *input, uint8_t *dest, int dest_stride, int tx_type);
-
-void vp9_rtcd(void);
-
-#ifdef RTCD_C
-#include "vpx_ports/arm.h"
-static void setup_rtcd_internal(void)
-{
-    int flags = arm_cpu_caps();
-
-    vp9_iht4x4_16_add = vp9_iht4x4_16_add_c;
-#if HAVE_NEON
-    if (flags & HAS_NEON) vp9_iht4x4_16_add = vp9_iht4x4_16_add_neon;
-#endif
-    vp9_iht8x8_64_add = vp9_iht8x8_64_add_c;
-#if HAVE_NEON
-    if (flags & HAS_NEON) vp9_iht8x8_64_add = vp9_iht8x8_64_add_neon;
-#endif
-}
-#endif
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif
-
-#endif