From 6f33896d8cadb81b5c9dbb01826ad1be84162942 Mon Sep 17 00:00:00 2001
From: Takoroka <137927095+Takoroka@users.noreply.github.com>
Date: Sat, 31 Oct 2026 02:33:36 -0400
Subject: nx2: decode AV1 movies

Fire Emblem: Fortune's Weave plays its movies as AV1 ("video/av01"). Map the codec to
AV_CODEC_ID_AV1; FFmpeg decodes it with libdav1d when the FFmpeg build has it.
---
 src/video_core/host1x/codecs/codec.cpp      | 2 ++
 src/video_core/host1x/ffmpeg.cpp            | 2 ++
 src/video_core/host1x/nvdec_common.h        | 1 +
 src/video_core/host1x/nx2_video_decoder.cpp | 4 ++++
 4 files changed, 9 insertions(+)

diff --git a/src/video_core/host1x/codecs/codec.cpp b/src/video_core/host1x/codecs/codec.cpp
index 56332866e5..3cbef1d891 100644
--- a/src/video_core/host1x/codecs/codec.cpp
+++ b/src/video_core/host1x/codecs/codec.cpp
@@ -104,6 +104,8 @@ std::string_view Codec::GetCurrentCodecName() const {
         return "H265";
     case Host1x::NvdecCommon::VideoCodec::VP9:
         return "VP9";
+    case Host1x::NvdecCommon::VideoCodec::AV1:
+        return "AV1";
     default:
         return "Unknown";
     }
diff --git a/src/video_core/host1x/ffmpeg.cpp b/src/video_core/host1x/ffmpeg.cpp
index 676e5820a5..1af8307adc 100644
--- a/src/video_core/host1x/ffmpeg.cpp
+++ b/src/video_core/host1x/ffmpeg.cpp
@@ -163,6 +163,8 @@ Decoder::Decoder(Tegra::Host1x::NvdecCommon::VideoCodec codec) {
             return AV_CODEC_ID_VP8;
         case Tegra::Host1x::NvdecCommon::VideoCodec::VP9:
             return AV_CODEC_ID_VP9;
+        case Tegra::Host1x::NvdecCommon::VideoCodec::AV1:
+            return AV_CODEC_ID_AV1;
         default:
             UNIMPLEMENTED_MSG("Unknown codec {}", codec);
             return AV_CODEC_ID_NONE;
diff --git a/src/video_core/host1x/nvdec_common.h b/src/video_core/host1x/nvdec_common.h
index 0857a9f95c..26d7c86c98 100644
--- a/src/video_core/host1x/nvdec_common.h
+++ b/src/video_core/host1x/nvdec_common.h
@@ -22,6 +22,7 @@ enum class VideoCodec : u64 {
     VP8 = 0x5,
     H265 = 0x7,
     VP9 = 0x9,
+    AV1 = 0xA,
 };
 
 struct Offset {
diff --git a/src/video_core/host1x/nx2_video_decoder.cpp b/src/video_core/host1x/nx2_video_decoder.cpp
index 7d185ca573..9b34bd84af 100644
--- a/src/video_core/host1x/nx2_video_decoder.cpp
+++ b/src/video_core/host1x/nx2_video_decoder.cpp
@@ -35,6 +35,10 @@ std::optional<NvdecCommon::VideoCodec> CodecFromMime(std::string_view mime) {
     if (mime.find("vp8") != std::string_view::npos) {
         return NvdecCommon::VideoCodec::VP8;
     }
+    // "video/av01" or "video/av1". FFmpeg decodes AV1 with libdav1d.
+    if (mime.find("av01") != std::string_view::npos || mime.find("av1") != std::string_view::npos) {
+        return NvdecCommon::VideoCodec::AV1;
+    }
     if (mime.find("avc") != std::string_view::npos || mime.find("264") != std::string_view::npos) {
         return NvdecCommon::VideoCodec::H264;
     }
-- 
cgit v1.2.3


From 959973a76abaa5444b4b300c37b6d8245ac89396 Mon Sep 17 00:00:00 2001
From: Takoroka <137927095+Takoroka@users.noreply.github.com>
Date: Sun, 1 Nov 2026 10:29:07 -0500
Subject: externals: FFmpeg with AV1 on Windows and Linux x86_64

crueter-ci's FFmpeg packages have no AV1 decoder, so the AV1 movies of
Switch 2 titles (Fire Emblem: Fortune's Weave) could not play. Windows
(MSVC) and Linux x86_64 builds now use Takoroka/ffmpeg-av1 9.0.2-av1-1:
the same FFmpeg commit, patch and configure flags as crueter-ci's
9.0.2-1790726865-946fcce07b, plus libdav1d 1.5.4 merged into avcodec.
Other platforms keep crueter-ci's packages.
---
 cpmfile.json                    | 7 +++++++
 externals/ffmpeg/CMakeLists.txt | 8 +++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/cpmfile.json b/cpmfile.json
index 0032734712..24ab198634 100644
--- a/cpmfile.json
+++ b/cpmfile.json
@@ -81,6 +81,13 @@
         "repo": "crueter-ci/FFmpeg",
         "version": "9.0.2-1790726865-946fcce07b"
     },
+    "ffmpeg-ci-av1": {
+        "ci": true,
+        "name": "ffmpeg",
+        "package": "FFmpeg",
+        "repo": "Takoroka/ffmpeg-av1",
+        "version": "9.0.2-av1-1"
+    },
     "fmt": {
         "hash": "f0da82c545b01692e9fd30fdfb613dbb8dd9716983dcd0ff19ac2a8d36f74beb5540ef38072fdecc1e34191b3682a8542ecbf3a61ef287dbba0a2679d4e023f2",
         "min_version": "8",
diff --git a/externals/ffmpeg/CMakeLists.txt b/externals/ffmpeg/CMakeLists.txt
index f1bf099c10..890de4303c 100644
--- a/externals/ffmpeg/CMakeLists.txt
+++ b/externals/ffmpeg/CMakeLists.txt
@@ -179,7 +179,13 @@ elseif (MANAGARM)
 endif()
 
 if (YUZU_USE_BUNDLED_FFMPEG)
-    AddJsonPackage(ffmpeg-ci)
+    # Windows (MSVC) and Linux x86_64 get the same FFmpeg with libdav1d, for Switch 2 titles' AV1
+    # movies; crueter-ci's packages, used elsewhere, have no AV1 decoder.
+    if ((MSVC OR LINUX) AND CPMUTIL_AMD64)
+        AddJsonPackage(ffmpeg-ci-av1)
+    else()
+        AddJsonPackage(ffmpeg-ci)
+    endif()
 
     set(FFmpeg_INCLUDE_DIR
         "${FFmpeg_SOURCE_DIR}/include;${FFmpeg_HWACCEL_INCLUDE_DIRS}"
-- 
cgit v1.2.3