eglantine-cirakg/src/video_core/host1x/nx2_video_decoder.cpp, branch nx2Mirror of github.com/cira0100/Eglantine-public nx2, a fork of Djihads80/Eglantine.https://git.cirakg.xyz/eglantine-cirakg/atom?h=nx22026-11-02T23:55:03+00:00nx2: video decoder: copy NV12 frames from a GPU decoder without swscale2026-11-02T23:55:03+00:00Jonasbaguettegamerofficial2020@gmail.com2026-11-02T23:47:42+00:00urn:sha1:873cae5569e9f0069a73f24ab5e4ffd0799b02e7
FFmpeg 6.1's swscale leaves the chroma plane of an NV12 to NV12 copy at
zero, so movies decoded on the host GPU (Mario Kart World's pre-race
movie, Hyrule Warriors' cutscenes) showed green. CPU-decoded frames
(YUV420P) were not affected.
nx2: vdecsvc picks H.264 when the configure carries no codec name and the stream is H.264 (Yoshi demo)2026-11-02T23:55:03+00:00rdennorhysdenno@gmail.com2026-10-31T16:14:21+00:00urn:sha1:701c91b402f47fdbb36d4f7c4b4bf1d0db08888b
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
nx2: decode AV1 movies2026-10-31T06:33:36+00:00Takoroka137927095+Takoroka@users.noreply.github.com2026-10-31T06:33:36+00:00urn:sha1:6f33896d8cadb81b5c9dbb01826ad1be84162942
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.
nx2: decode Switch 2 video (nn::codec::video) with FFmpeg2026-10-30T05:27:47+00:00Takoroka137927095+Takoroka@users.noreply.github.com2026-10-29T19:55:22+00:00urn:sha1:bcaeef479da759faa90aa84775193ccdf43ad9a3
The decoder service used to complete every submitted frame at once
without decoding it. Each decoder service (gsv 902/906/1002 -> TIPC 1)
now decodes on a thread of its own with FFmpeg (VP9, VP8, H.264;
video_core/host1x/nx2_video_decoder), in software or on the host GPU per
the NVDEC emulation setting.
- 101 takes the codec name ("video/vp9") from its A buffer.
- 109 queues the A buffer's frame; the ready event fires while the queue
has room.
- 311/314 reply a NativeSyncHandle {~syncpoint, 0, value}: the service
allocates a syncpoint and increments it per finished frame, frames
filling output images in register/release order like the client's
ring. 314 waits for the client's release fence before reuse.
- 213 returns the frame's size, pts (TimeSpan, ns) and end of stream.
- gsv 911 creates a decoder image pool (count images in one memory) and
gsv 961 returns the 128-byte CpuUserImageDescriptor that
nn::codec::ReadDecoderOutputImage* copy frames out with; images are
pitch-linear NV12, RGBA or BGRA.
- Each new video command is logged once in full; EDEN_NX2_VDEC_DUMP=<dir>
saves every 120th decoded frame's luma.
Title 1's Mushroom Cup opening (2560x1440 VP9, 1423 frames) now decodes
in real time and the game goes on to the race. The picture on screen
still stays on the first frame: the game memcpys each frame into GPU
memory and the texture cache keeps its first upload (notes 148).