18 files changed, 835 insertions, 0 deletions
diff --git a/media/libdav1d/README_MOZILLA b/media/libdav1d/README_MOZILLA
new file mode 100644
index 0000000000..38e7f1e6d2
--- /dev/null
+++ b/media/libdav1d/README_MOZILLA
@@ -0,0 +1,56 @@
+This directory contains build files for dav1d. The actual library
+source is in $TOPSRCDIR/third_party/dav1d/
+
+Any patches or additional configuration to be applied to the
+upstream source should be kept here in the media/libdav1d
+directory.
+
+To update the library source and build config files, execute
+
+  ./mach vendor media/libdav1d/moz.yaml
+
+To update to a specific upstream git tag or commit, use
+
+  ./mach vendor media/libdav1d/moz.yaml -r <commit>
+
+The upstream git repository is https://code.videolan.org/videolan/dav1d
+
+To update to a fork, use
+
+  ./mach vendor media/libdav1d/moz.yaml --repo <repository url> [-r <commit>]
+
+
+The rough steps are:
+- Execute ./mach vendor media/libdav1d/moz.yaml -r {tag-name}  # ex: ./mach vendor media/libdav1d/moz.yaml -r 0.6.0
+- Update ./moz.build and ./asm/moz.build to add new files and remove deleted ones using
+  third_party/dav1d/src/meson.build as a guide (confirm with the diff) (note the
+  empty .asm file in x86_64)
+- Some assembly files (notably avx2-specific ones) will generate no code on win32 builds,
+  leading to a nasm failure like:
+  "panic: assertion cv8_state.source_files != NULL failed at output/codeview.c:517"
+  These files can be identified by the `%if ARCH_X86_64` conditional around the entire contents.
+  To work around this error, move the sources to the moz.build block with the
+  `if CONFIG['TARGET_CPU'] == 'x86_64'` conditional.
+  See https://bugzilla.mozilla.org/show_bug.cgi?id=1712832 and
+      https://bugzilla.nasm.us/show_bug.cgi?id=3392658
+- Some files will be automatically added to the various autovendored_sources.mozbuild files.
+  In the case of the asm dir, these may cause build failures on particular platforms which
+  can be resolved by moving those out of autovendored_sources.mozbuild and into the regular
+  moz.build which has a condition on CONFIG['TARGET_CPU'].
+- Files ending in _tmpl.c may be automatically added to SOURCES, resulting in build failures.
+  To fix this, the file must be moved to the appropriate bitdepth_basenames list where
+  generate_source.py will generate the templates into buildable source files. In general,
+  all *_tmpl.c files require BITDEPTH to be defined.
+- Clone the tag from the dav1d repo and build a stand-alone libdav1d following the steps here:
+  https://code.videolan.org/videolan/dav1d#compile
+- Copy vcs_version.h from the local build/include/vcs_version.h
+  to media/libdav1d/vcs_version.h
+- Copy version.h from local build/include/dav1d/version.h to
+  media/libdav1d/version.h
+- Add new options, if any, in moz.build or config.h
+
+Tips:
+- If you see build failures in build-linux64-base-toolchains (or
+  similar jobs) dav1d may now require a higher minimum nasm version
+  than our base toolchains currently support.  A bug updating the
+  minimum nasm version will probably be necessary.
diff --git a/media/libdav1d/asm/moz.build b/media/libdav1d/asm/moz.build
new file mode 100644
index 0000000000..2b4fce7312
--- /dev/null
+++ b/media/libdav1d/asm/moz.build
@@ -0,0 +1,248 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 4 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# ASM enabled
+
+ASFLAGS += [
+    '-I%s/third_party/dav1d/src/' % TOPSRCDIR,
+    '-DHAVE_AVX512ICL=1',
+]
+
+LOCAL_INCLUDES += [
+    '/third_party/dav1d/',
+    '/third_party/dav1d/include/',
+    '/third_party/dav1d/src/',
+]
+
+# Don't export DAV1D_API symbols from libxul
+# see: third_party/dav1d/include/dav1d/common.h
+DEFINES['DAV1D_API'] = ''
+
+CFLAGS += [
+    # find the config.h file.
+    '-I%s/dist/include/dav1d/' % TOPOBJDIR,
+]
+
+# Store the stack alignment that will be used.
+stack_alignment = 0
+
+# Attaching config.asm file
+if CONFIG['TARGET_CPU'] == 'x86':
+    # Default stack alignment can be 4 bytes.
+    if CONFIG['OS_TARGET'] == 'WINNT':
+        stack_alignment = 4
+        ASFLAGS += ['-I%s/media/libdav1d/asm/x86_32/win/' % TOPSRCDIR]
+    else:
+        ASFLAGS += ['-I%s/media/libdav1d/asm/x86_32/' % TOPSRCDIR]
+        stack_alignment = 16
+        # Change stack alignment to 16 bytes.
+        if CONFIG['CC_TYPE'] == 'clang':
+            CFLAGS += ['-mstack-alignment=16']
+        elif CONFIG['CC_TYPE'] == 'gcc':
+            CFLAGS += ['-mpreferred-stack-boundary=4']
+elif CONFIG['TARGET_CPU'] == 'x86_64':
+    # Default stack aligment is 16 bytes.
+    stack_alignment = 16
+    if CONFIG['OS_TARGET'] == 'Darwin':
+        ASFLAGS += ['-I%s/media/libdav1d/asm/x86_64/osx/' % TOPSRCDIR]
+    elif CONFIG['OS_TARGET'] == 'WINNT':
+        ASFLAGS += ['-I%s/media/libdav1d/asm/x86_64/win/' % TOPSRCDIR]
+    else:
+        # The rest of the platforms are all Linux-like: plain Linux
+        # Android, OpenBSD, NetBSD, FreeBSD, DragonFly, SunOS
+        ASFLAGS += ['-I%s/media/libdav1d/asm/x86_64/linux/' % TOPSRCDIR]
+elif CONFIG['TARGET_CPU'] == 'aarch64':
+    stack_alignment = 16
+    ASFLAGS += ['-I%s/dist/include/dav1d/' % TOPOBJDIR]
+else:
+    error('Cpu arch %s is not expected' % CONFIG['TARGET_CPU'])
+
+# Set the macro here instead of config.h
+if stack_alignment == 0:
+    error('Stack alignment cannot be zero.')
+DEFINES['STACK_ALIGNMENT'] = stack_alignment
+
+if CONFIG['TARGET_CPU'] in ('x86', 'x86_64'):
+    ASFLAGS += ['-Dprivate_prefix=dav1d']
+
+    SOURCES += [
+        '../../../third_party/dav1d/src/x86/cpu.c',
+    ]
+
+    EXPORTS.dav1d += [
+        '../../../third_party/dav1d/src/x86/cpu.h',
+        '../../../third_party/dav1d/src/x86/msac.h',
+    ]
+
+    # ASM source files
+    if CONFIG['TARGET_CPU'] == 'x86_64':
+        # Empty file on all other archs. Nasm produces
+        # an error when it compiles empty files.
+        SOURCES += [
+            '../../../third_party/dav1d/src/x86/cdef16_avx2.asm', # moved from autovendored
+            '../../../third_party/dav1d/src/x86/cdef16_avx512.asm',
+            '../../../third_party/dav1d/src/x86/cdef_avx2.asm',
+            '../../../third_party/dav1d/src/x86/cdef_avx512.asm',
+            '../../../third_party/dav1d/src/x86/filmgrain16_avx2.asm',
+            '../../../third_party/dav1d/src/x86/filmgrain16_avx512.asm',
+            '../../../third_party/dav1d/src/x86/filmgrain_avx2.asm',
+            '../../../third_party/dav1d/src/x86/filmgrain_avx512.asm',
+            # '../../../third_party/dav1d/src/x86/filmgrain_common.asm',
+            # ^ filmgrain_common.asm must *not* be in SOURCES because it's only
+            # used as an %include for other .asm files. Trying to assemble it
+            # will result in a nasm error: parser: instruction expected
+            '../../../third_party/dav1d/src/x86/ipred16_avx512.asm',
+            '../../../third_party/dav1d/src/x86/ipred_avx2.asm',
+            '../../../third_party/dav1d/src/x86/ipred_avx512.asm',
+            '../../../third_party/dav1d/src/x86/itx16_avx2.asm',
+            '../../../third_party/dav1d/src/x86/itx16_avx512.asm',
+            '../../../third_party/dav1d/src/x86/itx_avx2.asm',
+            '../../../third_party/dav1d/src/x86/itx_avx512.asm',
+            '../../../third_party/dav1d/src/x86/loopfilter16_avx2.asm',
+            '../../../third_party/dav1d/src/x86/loopfilter16_avx512.asm',
+            '../../../third_party/dav1d/src/x86/loopfilter_avx2.asm',
+            '../../../third_party/dav1d/src/x86/loopfilter_avx512.asm',
+            '../../../third_party/dav1d/src/x86/looprestoration16_avx2.asm',
+            '../../../third_party/dav1d/src/x86/looprestoration16_avx512.asm',
+            '../../../third_party/dav1d/src/x86/looprestoration_avx2.asm',
+            '../../../third_party/dav1d/src/x86/looprestoration_avx512.asm',
+            '../../../third_party/dav1d/src/x86/mc16_avx2.asm',
+            '../../../third_party/dav1d/src/x86/mc16_avx512.asm',
+            '../../../third_party/dav1d/src/x86/mc_avx2.asm',
+            '../../../third_party/dav1d/src/x86/mc_avx512.asm',
+        ]
+
+    SOURCES += [
+        '../../../third_party/dav1d/src/x86/cdef16_sse.asm',
+        '../../../third_party/dav1d/src/x86/cdef_sse.asm',
+        '../../../third_party/dav1d/src/x86/cpuid.asm',
+        '../../../third_party/dav1d/src/x86/filmgrain16_sse.asm',
+        '../../../third_party/dav1d/src/x86/filmgrain_sse.asm',
+        '../../../third_party/dav1d/src/x86/ipred16_avx2.asm',
+        '../../../third_party/dav1d/src/x86/ipred16_sse.asm',
+        '../../../third_party/dav1d/src/x86/ipred_sse.asm',
+        '../../../third_party/dav1d/src/x86/itx16_sse.asm',
+        '../../../third_party/dav1d/src/x86/itx_sse.asm',
+        '../../../third_party/dav1d/src/x86/loopfilter16_sse.asm',
+        '../../../third_party/dav1d/src/x86/loopfilter_sse.asm',
+        '../../../third_party/dav1d/src/x86/looprestoration16_sse.asm', # moved from autovendored
+        '../../../third_party/dav1d/src/x86/looprestoration_sse.asm',
+        '../../../third_party/dav1d/src/x86/mc16_sse.asm',
+        '../../../third_party/dav1d/src/x86/mc_sse.asm',
+        '../../../third_party/dav1d/src/x86/msac.asm',
+        '../../../third_party/dav1d/src/x86/pal.asm',
+        '../../../third_party/dav1d/src/x86/refmvs.asm',
+    ]
+
+    # BITDEPTH
+    # All the files here should be *_tmpl.c, and the should not appear in SOURCES,
+    # since they require BITDEPTH to be defined
+    relative_path = '../../../third_party/dav1d/src/x86/'
+    bitdepth_basenames = [
+    ]
+
+
+    for f in bitdepth_basenames:
+        SOURCES += [
+            '!16bd_%s' % f
+        ]
+        GeneratedFile('16bd_%s' % f, script='../generate_source.py',
+                      entry_point='add_define', inputs=[relative_path + f],
+                      flags=['BITDEPTH', '16'])
+        SOURCES += [
+            '!8bd_%s' % f
+        ]
+        GeneratedFile('8bd_%s' % f, script='../generate_source.py',
+                      entry_point='add_define', inputs=[relative_path + f],
+                      flags=['BITDEPTH', '8'])
+
+elif CONFIG['TARGET_CPU'] == 'arm' or CONFIG['TARGET_CPU'] == 'aarch64':
+    SOURCES += [
+        '../../../third_party/dav1d/src/arm/cpu.c',
+    ]
+    EXPORTS += [
+        '../../../third_party/dav1d/src/arm/asm-offsets.h',
+        '../../../third_party/dav1d/src/arm/cpu.h',
+        '../../../third_party/dav1d/src/arm/msac.h',
+    ]
+
+    # BITDEPTH c file
+    # All the files here should be *_tmpl.c, and the should not appear in SOURCES,
+    # since they require BITDEPTH to be defined
+    relative_path = '../../../third_party/dav1d/src/arm/'
+    bitdepth_basenames = [
+    ]
+
+    for f in bitdepth_basenames:
+        SOURCES += [
+            '!16bd_%s' % f
+        ]
+        GeneratedFile('16bd_%s' % f, script='../generate_source.py',
+                      entry_point='add_define', inputs=[relative_path + f],
+                      flags=['BITDEPTH', '16'])
+        SOURCES += [
+            '!8bd_%s' % f
+        ]
+        GeneratedFile('8bd_%s' % f, script='../generate_source.py',
+                      entry_point='add_define', inputs=[relative_path + f],
+                      flags=['BITDEPTH', '8'])
+
+    # BITDEPTH .S files
+    if CONFIG['TARGET_CPU'] == 'aarch64':
+        SOURCES += [
+            '../../../third_party/dav1d/src/arm/64/cdef.S',
+            '../../../third_party/dav1d/src/arm/64/cdef16.S',
+            '../../../third_party/dav1d/src/arm/64/cdef_tmpl.S',
+            '../../../third_party/dav1d/src/arm/64/filmgrain.S',
+            '../../../third_party/dav1d/src/arm/64/filmgrain16.S',
+            '../../../third_party/dav1d/src/arm/64/ipred.S',
+            '../../../third_party/dav1d/src/arm/64/ipred16.S',
+            # itx.S is used for both 8 and 16 bpc.
+            '../../../third_party/dav1d/src/arm/64/itx.S',
+            '../../../third_party/dav1d/src/arm/64/itx16.S',
+            '../../../third_party/dav1d/src/arm/64/loopfilter.S',
+            '../../../third_party/dav1d/src/arm/64/loopfilter16.S',
+            '../../../third_party/dav1d/src/arm/64/looprestoration.S',
+            '../../../third_party/dav1d/src/arm/64/looprestoration16.S',
+            '../../../third_party/dav1d/src/arm/64/looprestoration_common.S',
+            '../../../third_party/dav1d/src/arm/64/looprestoration_tmpl.S',
+            '../../../third_party/dav1d/src/arm/64/mc.S',
+            '../../../third_party/dav1d/src/arm/64/mc16.S',
+            '../../../third_party/dav1d/src/arm/64/msac.S',
+            '../../../third_party/dav1d/src/arm/64/refmvs.S',
+        ]
+    elif CONFIG['TARGET_CPU'] == 'arm':
+        SOURCES += [
+            '../../../third_party/dav1d/src/arm/32/cdef.S',
+            '../../../third_party/dav1d/src/arm/32/cdef16.S',
+            '../../../third_party/dav1d/src/arm/32/cdef_tmpl.S',
+            '../../../third_party/dav1d/src/arm/32/filmgrain.S',
+            '../../../third_party/dav1d/src/arm/32/filmgrain16.S',
+            '../../../third_party/dav1d/src/arm/32/ipred.S',
+            '../../../third_party/dav1d/src/arm/32/ipred16.S',
+            '../../../third_party/dav1d/src/arm/32/itx.S',
+            '../../../third_party/dav1d/src/arm/32/itx16.S',
+            '../../../third_party/dav1d/src/arm/32/loopfilter.S',
+            '../../../third_party/dav1d/src/arm/32/loopfilter16.S',
+            '../../../third_party/dav1d/src/arm/32/looprestoration.S',
+            '../../../third_party/dav1d/src/arm/32/looprestoration16.S',
+            '../../../third_party/dav1d/src/arm/32/looprestoration_common.S',
+            '../../../third_party/dav1d/src/arm/32/looprestoration_tmpl.S',
+            '../../../third_party/dav1d/src/arm/32/mc.S',
+            '../../../third_party/dav1d/src/arm/32/mc16.S',
+            '../../../third_party/dav1d/src/arm/32/msac.S',
+            '../../../third_party/dav1d/src/arm/32/refmvs.S',
+        ]
+
+if CONFIG['TARGET_CPU'] in ('x86', 'x86_64'):
+    USE_NASM = True
+elif CONFIG['TARGET_CPU'] == 'aarch64' and CONFIG['OS_TARGET'] == 'WINNT':
+    USE_INTEGRATED_CLANGCL_AS = True
+
+FINAL_LIBRARY = 'gkmedias'
+
+# We allow warnings for third-party code that can be updated from upstream.
+AllowCompilerWarnings()
diff --git a/media/libdav1d/asm/x86_32/config.asm b/media/libdav1d/asm/x86_32/config.asm
new file mode 100644
index 0000000000..16624aa533
--- /dev/null
+++ b/media/libdav1d/asm/x86_32/config.asm
@@ -0,0 +1,11 @@
+; Autogenerated by the Meson build system.
+; Do not edit, your changes will be lost.
+
+%define ARCH_X86_32 1
+
+%define ARCH_X86_64 0
+
+%define PIC 1
+
+%define STACK_ALIGNMENT 16
+
diff --git a/media/libdav1d/asm/x86_32/win/config.asm b/media/libdav1d/asm/x86_32/win/config.asm
new file mode 100644
index 0000000000..f701a081aa
--- /dev/null
+++ b/media/libdav1d/asm/x86_32/win/config.asm
@@ -0,0 +1,13 @@
+; Autogenerated by the Meson build system.
+; Do not edit, your changes will be lost.
+
+%define ARCH_X86_32 1
+
+%define ARCH_X86_64 0
+
+%define PIC 1
+
+%define PREFIX 1
+
+%define STACK_ALIGNMENT 4
+
diff --git a/media/libdav1d/asm/x86_64/config.asm b/media/libdav1d/asm/x86_64/config.asm
new file mode 100644
index 0000000000..26c26f785c
--- /dev/null
+++ b/media/libdav1d/asm/x86_64/config.asm
@@ -0,0 +1,9 @@
+; Autogenerated by the Meson build system.
+; Do not edit, your changes will be lost.
+
+%define ARCH_X86_32 0
+
+%define ARCH_X86_64 1
+
+%define STACK_ALIGNMENT 32
+
diff --git a/media/libdav1d/asm/x86_64/linux/config.asm b/media/libdav1d/asm/x86_64/linux/config.asm
new file mode 100644
index 0000000000..8fc2739276
--- /dev/null
+++ b/media/libdav1d/asm/x86_64/linux/config.asm
@@ -0,0 +1,11 @@
+; Autogenerated by the Meson build system.
+; Do not edit, your changes will be lost.
+
+%define ARCH_X86_32 0
+
+%define ARCH_X86_64 1
+
+%define PIC 1
+
+%define STACK_ALIGNMENT 16
+
diff --git a/media/libdav1d/asm/x86_64/osx/config.asm b/media/libdav1d/asm/x86_64/osx/config.asm
new file mode 100644
index 0000000000..d1ad0b196e
--- /dev/null
+++ b/media/libdav1d/asm/x86_64/osx/config.asm
@@ -0,0 +1,13 @@
+; Autogenerated by the Meson build system.
+; Do not edit, your changes will be lost.
+
+%define ARCH_X86_32 0
+
+%define ARCH_X86_64 1
+
+%define PIC 1
+
+%define PREFIX 1
+
+%define STACK_ALIGNMENT 16
+
diff --git a/media/libdav1d/asm/x86_64/win/config.asm b/media/libdav1d/asm/x86_64/win/config.asm
new file mode 100644
index 0000000000..8fc2739276
--- /dev/null
+++ b/media/libdav1d/asm/x86_64/win/config.asm
@@ -0,0 +1,11 @@
+; Autogenerated by the Meson build system.
+; Do not edit, your changes will be lost.
+
+%define ARCH_X86_32 0
+
+%define ARCH_X86_64 1
+
+%define PIC 1
+
+%define STACK_ALIGNMENT 16
+
diff --git a/media/libdav1d/config.h b/media/libdav1d/config.h
new file mode 100644
index 0000000000..218c8ae7f4
--- /dev/null
+++ b/media/libdav1d/config.h
@@ -0,0 +1,68 @@
+#pragma once
+
+// Set platform
+#if defined(__aarch64__) || defined(_M_ARM64)
+#  define ARCH_AARCH64 1
+#else
+#  define ARCH_AARCH64 0
+#endif
+
+#if defined(__arm__) || defined(_M_ARM)
+#  define ARCH_ARM 1
+#else
+#  define ARCH_ARM 0
+#endif
+
+#if defined(__i386__) || defined(_M_IX86)
+#  define ARCH_X86_32 1
+#else
+#  define ARCH_X86_32 0
+#endif
+
+#if defined(__x86_64__) || defined(_M_X64)
+#  define ARCH_X86_64 1
+#else
+#  define ARCH_X86_64 0
+#endif
+
+#if ARCH_X86_32 == 1 || ARCH_X86_64 == 1
+#  define ARCH_X86 1
+#else
+#  define ARCH_X86 0
+#endif
+
+// Set both bitdepeth in every case
+#define CONFIG_16BPC 1
+#define CONFIG_8BPC 1
+
+// Enable asm
+#if defined(MOZ_DAV1D_ASM)
+#  define HAVE_ASM 1
+#else
+#  define HAVE_ASM 0
+#endif
+
+#if ARCH_AARCH64 == 1
+// Those values are copied from the auto generated
+// config file produced by stand alone dav1d build.
+#  define HAVE_AS_FUNC 0
+#  define HAVE_GETAUXVAL 1
+#  define PIC 3
+#endif
+
+// The following macros are defined from autoconf
+// according to the system configuration.
+// (HAVE_MEMALIGN | HAVE_ALIGNED_MALLOC | HAVE_POSIX_MEMALIGN)
+// HAVE_UNISTD_H
+
+// Important when asm is enabled
+#if defined(__APPLE__) || (ARCH_x86_32 == 1 && defined(_WIN32))
+#  define PREFIX 1
+#endif
+
+#if defined(_WIN32) || defined(__CYGWIN__)
+// _WIN32_WINNT 0x0601 is set in global macros
+#  define UNICODE 1
+#  define _UNICODE 1
+#  define __USE_MINGW_ANSI_STDIO 1
+#endif
diff --git a/media/libdav1d/generate_source.py b/media/libdav1d/generate_source.py
new file mode 100644
index 0000000000..4c2dad0dae
--- /dev/null
+++ b/media/libdav1d/generate_source.py
@@ -0,0 +1,11 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+def add_define(out_file, in_path, expr, num = ''):
+    out_file.write('#define %s %s\n' % (expr, num))
+    with open(in_path, 'r', encoding='utf-8') as fh:
+        out_file.write(fh.read())
diff --git a/media/libdav1d/moz.build b/media/libdav1d/moz.build
new file mode 100644
index 0000000000..821845c00e
--- /dev/null
+++ b/media/libdav1d/moz.build
@@ -0,0 +1,216 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+Library('dav1d')
+
+LOCAL_INCLUDES += [
+    '/third_party/dav1d',
+    '/third_party/dav1d/include',
+    '/third_party/dav1d/include/dav1d',
+    '/third_party/dav1d/src',
+]
+
+EXPORTS.dav1d += [
+    'config.h',
+    'version.h',
+]
+
+# entrypoint source files
+entrypoint_source_files = [
+    '../../third_party/dav1d/src/lib.c',
+    '../../third_party/dav1d/src/thread_task.c',
+]
+SOURCES += [f for f in entrypoint_source_files]
+
+# Don't export DAV1D_API symbols from libxul
+# see: third_party/dav1d/include/dav1d/common.h
+DEFINES['DAV1D_API'] = ''
+
+if CONFIG['MOZ_DAV1D_ASM']:
+    DIRS += ['asm']
+
+    # Store the stack alignment that will be used.
+    stack_alignment = 0
+
+    # Default stack alignment can be 4 bytes on x86.
+    if CONFIG['TARGET_CPU'] == 'x86':
+        if CONFIG['OS_TARGET'] == 'WINNT':
+            # Allow the default to avoid crashes
+            stack_alignment = 4
+        else:
+            # Update stack alignment to 16 bytes.
+            stack_alignment = 16
+            if CONFIG['CC_TYPE'] == 'clang':
+                CFLAGS += ['-mstack-alignment=16']
+                for ep in entrypoint_source_files:
+                    SOURCES[ep].flags += ['-mstackrealign']
+            elif CONFIG['CC_TYPE'] == 'gcc':
+                CFLAGS += ['-mpreferred-stack-boundary=4']
+                for ep in entrypoint_source_files:
+                    SOURCES[ep].flags += ['-mincoming-stack-boundary=2']
+    elif CONFIG['TARGET_CPU'] in ('x86_64', 'aarch64'):
+        # The default stack alignment is 16 bytes.
+        stack_alignment = 16
+    else:
+        error('Cpu arch %s is not expected' % CONFIG['TARGET_CPU'])
+
+    # Set the macro here instead of config.h
+    if stack_alignment == 0:
+        error('Stack alignment cannot be zero.')
+    DEFINES['STACK_ALIGNMENT'] = stack_alignment
+
+if CONFIG['OS_TARGET'] == 'Linux':
+    # For fuzzing, We only support building on Linux currently.
+    include('/tools/fuzzing/libfuzzer-config.mozbuild')
+    if CONFIG['FUZZING_INTERFACES']:
+        TEST_DIRS += [
+            'test/fuzztest'
+        ]
+
+# common sources
+SOURCES += [
+    '../../third_party/dav1d/src/cdf.c',
+    '../../third_party/dav1d/src/cpu.c',
+    '../../third_party/dav1d/src/data.c',
+    '../../third_party/dav1d/src/decode.c',
+    '../../third_party/dav1d/src/dequant_tables.c',
+    '../../third_party/dav1d/src/getbits.c',
+    '../../third_party/dav1d/src/intra_edge.c',
+    '../../third_party/dav1d/src/itx_1d.c',
+    '../../third_party/dav1d/src/lf_mask.c',
+    '../../third_party/dav1d/src/log.c',
+    '../../third_party/dav1d/src/mem.c',
+    '../../third_party/dav1d/src/msac.c',
+    '../../third_party/dav1d/src/obu.c',
+    '../../third_party/dav1d/src/pal.c',
+    '../../third_party/dav1d/src/picture.c',
+    '../../third_party/dav1d/src/qm.c',
+    '../../third_party/dav1d/src/ref.c',
+    '../../third_party/dav1d/src/refmvs.c',
+    '../../third_party/dav1d/src/scan.c',
+    '../../third_party/dav1d/src/tables.c',
+    '../../third_party/dav1d/src/warpmv.c',
+    '../../third_party/dav1d/src/wedge.c',
+]
+
+# includes src
+EXPORTS.dav1d.src += [
+    '../../third_party/dav1d/src/cdf.h',
+    '../../third_party/dav1d/src/cpu.h',
+    '../../third_party/dav1d/src/ctx.h',
+    '../../third_party/dav1d/src/data.h',
+    '../../third_party/dav1d/src/decode.h',
+    '../../third_party/dav1d/src/dequant_tables.h',
+    '../../third_party/dav1d/src/filmgrain.h',
+    '../../third_party/dav1d/src/getbits.h',
+    '../../third_party/dav1d/src/intra_edge.h',
+    '../../third_party/dav1d/src/lf_mask.h',
+    '../../third_party/dav1d/src/log.h',
+    '../../third_party/dav1d/src/mem.h',
+    '../../third_party/dav1d/src/msac.h',
+    '../../third_party/dav1d/src/obu.h',
+    '../../third_party/dav1d/src/picture.h',
+    '../../third_party/dav1d/src/qm.h',
+    '../../third_party/dav1d/src/ref.h',
+    '../../third_party/dav1d/src/refmvs.h',
+    '../../third_party/dav1d/src/scan.h',
+    '../../third_party/dav1d/src/tables.h',
+    '../../third_party/dav1d/src/thread.h',
+    '../../third_party/dav1d/src/warpmv.h',
+    '../../third_party/dav1d/src/wedge.h',
+]
+
+# common BITDEPTH 8, 16
+# All the files here should be *_tmpl.c, and the should not appear in SOURCES,
+# since they require BITDEPTH to be defined
+relative_path = '../../third_party/dav1d/src/'
+bitdepth_basenames = [
+    'cdef_apply_tmpl.c',
+    'cdef_tmpl.c',
+    'fg_apply_tmpl.c',
+    'filmgrain_tmpl.c',
+    'ipred_prepare_tmpl.c',
+    'ipred_tmpl.c',
+    'itx_tmpl.c',
+    'lf_apply_tmpl.c',
+    'loopfilter_tmpl.c',
+    'looprestoration_tmpl.c',
+    'lr_apply_tmpl.c',
+    'mc_tmpl.c',
+    'recon_tmpl.c'
+]
+
+generated_files = []
+
+for f in bitdepth_basenames:
+    file_bd16 = '16bd_%s' % f
+    file_bd8 = '8bd_%s' % f
+
+    GeneratedFile(file_bd16,
+                  script='generate_source.py',
+                  entry_point='add_define',
+                  inputs=[relative_path + f],
+                  flags=['BITDEPTH', '16'])
+    GeneratedFile(file_bd8,
+                  script='generate_source.py',
+                  entry_point='add_define',
+                  inputs=[relative_path + f],
+                  flags=['BITDEPTH', '8'])
+
+    generated_files += [file_bd16, file_bd8]
+
+for p in generated_files:
+    if p.endswith('.c'):
+        SOURCES += ['!%s' % p]
+
+EXPORTS.dav1d.src += [
+    '../../third_party/dav1d/src/cdef.h',
+    '../../third_party/dav1d/src/cdef_apply.h',
+    '../../third_party/dav1d/src/fg_apply.h',
+    '../../third_party/dav1d/src/ipred.h',
+    '../../third_party/dav1d/src/ipred_prepare.h',
+    '../../third_party/dav1d/src/itx.h',
+    '../../third_party/dav1d/src/itx_1d.h',
+    '../../third_party/dav1d/src/lf_apply.h',
+    '../../third_party/dav1d/src/loopfilter.h',
+    '../../third_party/dav1d/src/looprestoration.h',
+    '../../third_party/dav1d/src/lr_apply.h',
+    '../../third_party/dav1d/src/mc.h',
+    '../../third_party/dav1d/src/recon.h',
+]
+
+# include/common
+EXPORTS.dav1d += [
+    '../../third_party/dav1d/include/common/attributes.h',
+    '../../third_party/dav1d/include/common/bitdepth.h',
+    '../../third_party/dav1d/include/common/dump.h',
+    '../../third_party/dav1d/include/common/frame.h',
+    '../../third_party/dav1d/include/common/intops.h',
+    '../../third_party/dav1d/include/common/validate.h',
+]
+
+# include/dav1d
+EXPORTS.dav1d += [
+   '../../third_party/dav1d/include/dav1d/common.h',
+   '../../third_party/dav1d/include/dav1d/data.h',
+   '../../third_party/dav1d/include/dav1d/dav1d.h',
+   '../../third_party/dav1d/include/dav1d/headers.h',
+   '../../third_party/dav1d/include/dav1d/picture.h',
+]
+
+if CONFIG['OS_TARGET'] == 'WINNT':
+    SOURCES += [
+        '../../third_party/dav1d/src/win32/thread.c'
+    ]
+
+if CONFIG['CC_TYPE'] == 'gcc':
+    LOCAL_INCLUDES += ['../../third_party/dav1d/include/compat/gcc/']
+    EXPORTS.dav1d += ['../../third_party/dav1d/include/compat/gcc/stdatomic.h']
+
+FINAL_LIBRARY = 'gkmedias'
+
+# We allow warnings for third-party code that can be updated from upstream.
+AllowCompilerWarnings()
diff --git a/media/libdav1d/moz.yaml b/media/libdav1d/moz.yaml
new file mode 100644
index 0000000000..7814d096dd
--- /dev/null
+++ b/media/libdav1d/moz.yaml
@@ -0,0 +1,73 @@
+# Version of this schema
+schema: 1
+
+bugzilla:
+  # Bugzilla product and component for this directory and subdirectories
+  product: Core
+  component: "Audio/Video: Playback"
+
+# Document the source of externally hosted code
+origin:
+
+  # Short name of the package/library
+  name: dav1d
+
+  description: dav1d, a fast AV1 decoder
+
+  # Full URL for the package's homepage/etc
+  # Usually different from repository url
+  url: https://code.videolan.org/videolan/dav1d
+
+  # Human-readable identifier for this version/release
+  # Generally "version NNN", "tag SSS", "bookmark SSS"
+  release: a6878be7e07114f5a2915ad46300700f0db55197 (2024-01-31T06:04:21.000-05:00).
+
+  # Revision to pull in
+  # Must be a long or short commit SHA (long preferred)
+  revision: a6878be7e07114f5a2915ad46300700f0db55197
+
+  # The package's license, where possible using the mnemonic from
+  # https://spdx.org/licenses/
+  # Multiple licenses can be specified (as a YAML list)
+  # A "LICENSE" file must exist containing the full license text
+  license: BSD-2-Clause
+
+  license-file: COPYING
+
+updatebot:
+    maintainer-phab: chunmin
+    maintainer-bz: cchang@mozilla.com
+    tasks:
+      - type: vendoring
+        enabled: true
+        frequency: release
+
+vendoring:
+  url: https://code.videolan.org/videolan/dav1d
+  source-hosting: gitlab
+  vendor-directory: third_party/dav1d
+
+  exclude:
+    - "build/.git*"
+    - doc
+    - examples
+    - package
+    - tests/checkasm
+    - tools
+
+  generated:
+    - '{yaml_dir}/vcs_version.h'
+    - '{yaml_dir}/version.h'
+
+  update-actions:
+    - action: copy-file
+      from: include/vcs_version.h.in
+      to: '{yaml_dir}/vcs_version.h'
+    - action: replace-in-file
+      pattern: '@VCS_TAG@'
+      with: '{revision}'
+      file: '{yaml_dir}/vcs_version.h'
+    - action: run-script
+      script: '{yaml_dir}/update-version.sh'
+      cwd: '{vendor_dir}'
+      args: ['{yaml_dir}/version.h']
diff --git a/media/libdav1d/test/fuzztest/autovendored_sources.mozbuild b/media/libdav1d/test/fuzztest/autovendored_sources.mozbuild
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/media/libdav1d/test/fuzztest/autovendored_sources.mozbuild
diff --git a/media/libdav1d/test/fuzztest/dav1d_fuzz_adapter.cpp b/media/libdav1d/test/fuzztest/dav1d_fuzz_adapter.cpp
new file mode 100644
index 0000000000..8f571143dd
--- /dev/null
+++ b/media/libdav1d/test/fuzztest/dav1d_fuzz_adapter.cpp
@@ -0,0 +1,15 @@
+
+#include "FuzzingInterface.h"
+
+#define LLVMFuzzerInitialize Dav1dFuzzerInitialize
+#define LLVMFuzzerTestOneInput Dav1dFuzzerTestOneInput
+
+extern "C" {
+#include "tests/libfuzzer/dav1d_fuzzer.c"
+}
+
+#undef LLVMFuzzerInitialize
+#undef LLVMFuzzerTestOneInput
+
+MOZ_FUZZING_INTERFACE_RAW(Dav1dFuzzerInitialize, Dav1dFuzzerTestOneInput,
+                          Dav1dDecode);
diff --git a/media/libdav1d/test/fuzztest/moz.build b/media/libdav1d/test/fuzztest/moz.build
new file mode 100644
index 0000000000..e9808cba0d
--- /dev/null
+++ b/media/libdav1d/test/fuzztest/moz.build
@@ -0,0 +1,34 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+Library('FuzzingDav1d')
+
+LOCAL_INCLUDES += [
+    '/media/libdav1d',
+    '/third_party/dav1d',
+    '/third_party/dav1d/include',
+    '/third_party/dav1d/tests/libfuzzer/',
+]
+
+# We currently only support building on Linux for fuzzing here, as guarded
+# in media/libaom/moz.build. More support can be added later if necessary.
+if CONFIG['TARGET_CPU'] == 'x86_64':
+    LOCAL_INCLUDES += [
+        '/media/libdav1d/asm/x86_64/',
+    ]
+elif CONFIG['TARGET_CPU'] == 'x86':
+    LOCAL_INCLUDES += [
+        '/media/libdav1d/asm/x86_32/',
+    ]
+
+SOURCES += [
+    '/third_party/dav1d/tests/libfuzzer/dav1d_fuzzer.c',
+    'dav1d_fuzz_adapter.cpp',
+]
+
+include('/tools/fuzzing/libfuzzer-config.mozbuild')
+
+FINAL_LIBRARY = 'xul-gtest'
diff --git a/media/libdav1d/update-version.sh b/media/libdav1d/update-version.sh
new file mode 100755
index 0000000000..8d51315ea7
--- /dev/null
+++ b/media/libdav1d/update-version.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+MAJOR_VERSION=$(grep -E "dav1d_soname_version\s+=" meson.build | grep -o -E "'([0-9]+)" | sed "s/'//")
+MINOR_VERSION=$(grep -E "dav1d_soname_version\s+=" meson.build | grep -o -E "\.([0-9]+)\." | sed "s/\.//g")
+PATCH_VERSION=$(grep -E "dav1d_soname_version\s+=" meson.build | grep -o -E "([0-9]+)'" | sed "s/'//")
+
+sed -i.bak "s/DAV1D_API_VERSION_MAJOR \([0-9]\+\)/DAV1D_API_VERSION_MAJOR $MAJOR_VERSION/" "$1"
+sed -i.bak "s/DAV1D_API_VERSION_MINOR \([0-9]\+\)/DAV1D_API_VERSION_MINOR $MINOR_VERSION/" "$1"
+sed -i.bak "s/DAV1D_API_VERSION_PATCH \([0-9]\+\)/DAV1D_API_VERSION_PATCH $PATCH_VERSION/" "$1"
+rm -f "$1.bak"
diff --git a/media/libdav1d/vcs_version.h b/media/libdav1d/vcs_version.h
new file mode 100644
index 0000000000..8667ed8fb2
--- /dev/null
+++ b/media/libdav1d/vcs_version.h
@@ -0,0 +1,2 @@
+/* auto-generated, do not edit */
+#define DAV1D_VERSION "a6878be7e07114f5a2915ad46300700f0db55197"
diff --git a/media/libdav1d/version.h b/media/libdav1d/version.h
new file mode 100644
index 0000000000..e5c01f1d00
--- /dev/null
+++ b/media/libdav1d/version.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2019, VideoLAN and dav1d authors
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. 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 DAV1D_VERSION_H
+#define DAV1D_VERSION_H
+
+#define DAV1D_API_VERSION_MAJOR 7
+#define DAV1D_API_VERSION_MINOR 0
+#define DAV1D_API_VERSION_PATCH 0
+
+#endif /* DAV1D_VERSION_H */