Use pre-generated headers for runtime CPU detection instead of Perl script.

Add cmake build system for vtkstreaming

disable-runtime-cpu-detect for apple arm64

fix `macos-arm64` builds to use only neon intrinsics.

Attempt #1 to vendor libvpx

Initial CMake build system for libvpx

Release v1.12.0 Torrent Duck

2022-06-17 v1.12.0 "Torrent Duck"

  This release adds optimizations for Loongarch, adds support for vp8 in the
  real-time rate control library, upgrades GoogleTest to v1.11.0, updates
  libwebm to libwebm-1.0.0.28-20-g206d268, and includes numerous bug fixes.

- Upgrading:
    This release is ABI compatible with the previous release.
    vp8 support in the real-time rate control library.
    New codec control VP8E_SET_RTC_EXTERNAL_RATECTRL is added.
    Configure support for darwin21 is added.
    GoogleTest is upgraded to v1.11.0.
    libwebm is updated to libwebm-1.0.0.28-20-g206d268.

- Enhancement:
    Numerous improvements on checking memory allocations.
    Optimizations for Loongarch.
    Code clean-up.

- Bug fixes:
    Fix to a crash related to {vp8/vp9}_set_roi_map.
    Fix to compiling failure with -Wformat-nonliteral.
    Fix to integer overflow with vp9 with high resolution content.
    Fix to AddNoiseTest failure with ARMv7.
    Fix to libvpx Null-dereference READ in vp8.

Release Candidate 1 v1.12.0 Torrent Duck

Release v1.11.0 Smew Duck

2021-09-27 v1.11.0 "Smew Duck"
  This maintenance release adds support for VBR mode in VP9 rate control
  interface, new codec controls to get quantization parameters and loop filter
  levels, and includes several improvements to NEON and numerous bug fixes.

  - Upgrading:
    New codec control is added to get quantization parameters and loop filter
    levels.

    VBR mode is supported in VP9 rate control library.

  - Enhancement:
    Numerous improvements for Neon optimizations.
    Code clean-up and refactoring.
    Calculation of rd multiplier is changed with BDRATE gains.

  - Bug fixes:
    Fix to overflow on duration.
    Fix to several instances of -Wunused-but-set-variable.
    Fix to avoid chroma resampling for 420mpeg2 input.
    Fix to overflow in calc_iframe_target_size.
    Fix to disallow skipping transform and quantization.
    Fix some -Wsign-compare warnings in simple_encode.
    Fix input file path in simple_encode_test.
    Fix valid range for under/over_shoot pct.

Release Candidate v1.11.0 Smew Duck

Release v1.10.0 Ruddy Duck

2021-03-09 v1.10.0 "Ruddy Duck"

  This maintenance release adds support for darwin20 and new codec controls, as
  well as numerous bug fixes.

  - Upgrading:

    New codec control is added to disable loopfilter for VP9.

    New encoder control is added to disable feature to increase Q on overshoot
    detection for CBR.

    Configure support for darwin20 is added.

    New codec control is added for VP9 rate control. The control ID of this
    interface is VP9E_SET_EXTERNAL_RATE_CONTROL. To make VP9 use a customized
    external rate control model, users will have to implement each callback
    function in vpx_rc_funcs_t and register them using libvpx API
    vpx_codec_control_() with the control ID.

  - Enhancement:

    Use -std=gnu++11 instead of -std=c++11 for c++ files.

  - Bug fixes:

    Override assembler with --as option of configure for MSVS.

    Fix several compilation issues with gcc 4.8.5.

    Fix to resetting rate control for temporal layers.

    Fix to the rate control stats of SVC example encoder when number of spatial
    layers is 1.

    Fix to reusing motion vectors from the base spatial layer in SVC.

    2 pass related flags removed from SVC example encoder.

libvpx v1.10.0 Ruddy Duck Release Candidate 2

Added CHANGELOG
Updated AUTHORS
Bumped up library versions

Release candidate 1 for v1.10.0 ruddy

Release v1.9.0 Quacking Duck

Release Candidate 1 for v1.9.0 Quacking Duck

2019-12-09 v1.8.2 "Pekin Duck"
  This release collects incremental improvements to many aspects of the library.

  - Upgrading:
    ARCH_* defines have been removed in favor of VPX_ARCH_*.

2019-07-15 v1.8.1 "Orpington Duck"
  This release collects incremental improvements to many aspects of the library.

  - Upgrading:
    VP8E_SET_CPUUSED now accepts values up to 9 for vp9.
    VPX_CTRL_VP9E_SET_MAX_INTER_BITRATE_PCT had a spelling fix (was VP8E).
    The --sdk-path option has been removed. If you were using it to build for
      Android please read build/make/Android.mk for alternatives.
    All PPC optimizations have been disabled:
      https://bugs.chromium.org/p/webm/issues/detail?id=1522.

  - Enhancements:
    Various changes to improve encoder rate control, quality and speed
      for practically every use case.

  - Bug fixes:
    vp9-rtc: Fix color artifacts for speed >= 8.