Phase 8.7: media controller + multi-frame streaming verification
Two pieces — both shipped:
1. Media controller binding closes the last v4l2-compliance
failure from 8.6 (DECODER_CMD, which requires has_media on
stateless decoders) and unlocks the V4L2 request API for
libva-v4l2-request.
2. Multi-frame streaming test exercises the daemon's
AVCodecContext state preservation across many REQ_DECODE
calls — Phase 8.6's tests pushed exactly one keyframe per
invocation; real content has P-frame references.
Compliance now reaches **49/49 passing.**
Kernel (kernel/daedalus_v4l2_main.{c,h}):
- Added `struct media_device mdev` to daedalus_dev.
- media_device_init(&mdev) BEFORE v4l2_device_register so
v4l2-core sees v4l2_dev.mdev = &mdev and binds the m2m
entities into the graph during register.
- After video_register_device:
v4l2_m2m_register_media_controller(..., MEDIA_ENT_F_PROC_VIDEO_DECODER)
then media_device_register so userspace sees the complete
graph in /dev/mediaN with the decoder entity tagged.
- daedalus_remove unwinds in reverse: unregister media,
unregister mc, unregister video, release m2m, unregister
v4l2, cleanup mdev.
- Error paths added for both new failure points.
Test harness (tools/test_m2m_stream.c, new):
- Multi-frame V4L2 m2m client: parses IVF → 4-deep buffer
rings on both queues → per-frame QBUF/DQBUF loop →
concatenates decoded NV12 to output file. Returns 0 only
if every input frame decoded without error.
- Same codec vocabulary as test_m2m_decode (vp9 | av1 |
h264 via 5th arg).
Verification on hertz (Pi 5, 6.12.75+rpt-rpi-2712):
v4l2-compliance: 49 tests, 49 passed, 0 failed, 0 warnings.
$ v4l2-ctl --list-devices
daedalus-fourier V3D7+NEON (platform:daedalus_v4l2):
/dev/video0
/dev/media3
VP9 320×240 30 frames (1 keyframe + 29 P-frames, 3.46 MB
NV12): byte-for-byte match vs `ffmpeg -i in.ivf -pix_fmt
nv12 -f rawvideo`.
VP9 1920×1080 10 frames (31 MB NV12 through the dmabuf
path): byte-for-byte match vs same reference command.
Daemon log shows cookies 1..30 all completing cleanly in
order; lazily-opened AVCodecContext maintains reference
frames across the chardev round-trips.
Clean SIGTERM + rmmod, no oops/WARN.
Roadmap update (docs/roadmap.md):
- 8.7 marked closed with closure-doc reference.
- 8.8 reshaped: perf profiling, QPU dispatch substitution
via daedalus-fourier, multi-frame AV1/H.264, HDR (P010M).
Per correctness-before-speed:
- Order-correct media controller lifecycle (init → bind
v4l2_dev → register video → register mc → register
media; reverse for teardown).
- 4-deep buffer rings on both queues — the scheduler
actually pipelines multiple in-flight cookies through
the chardev (not just one-at-a-time as in 8.5/8.6 tests).
- Bit-exact comparison against ffmpeg, not "looks right."
- All resource paths cleaned on every error branch.
Phase 8.8 next: profile daemon hot loops, dlopen
daedalus-fourier from the daemon, swap FFmpeg per-block
calls for daedalus_dispatch_* where the kernel matches,
target 30fps@1080p from 30fps-floor-is-fine memory.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
@@ -0,0 +1,207 @@
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# Phase 8.7 closure — media controller + multi-frame streaming
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**Status:** closed 2026-05-18.
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Two pieces:
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1. **Media controller binding** — closes the last
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v4l2-compliance failure from Phase 8.6 (DECODER_CMD,
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which requires `has_media` on stateless decoders) and
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unlocks the V4L2 request API for libva-v4l2-request.
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2. **Multi-frame streaming verification** — Phase 8.6's
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end-to-end tests pushed exactly one keyframe per
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invocation. Real-world content has reference frames
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(P-frames in VP9, etc.), so the daemon must maintain
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AVCodecContext state across many REQ_DECODE calls.
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This phase exercises that path with 30+10-frame
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streams and checks pixel-bit-exact equivalence to a
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reference FFmpeg decode.
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Compliance now reaches **49/49 passing.**
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## What lands
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### Kernel media controller (`kernel/daedalus_v4l2_main.{c,h}`)
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- New `struct media_device mdev` field in `daedalus_dev`.
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- `media_device_init(&dev->mdev)` before
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`v4l2_device_register` so v4l2-core picks up the
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mdev binding when it sees `v4l2_dev.mdev = &dev->mdev`.
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- After `video_register_device` succeeds:
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`v4l2_m2m_register_media_controller(m2m_dev, &dev->vdev,
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MEDIA_ENT_F_PROC_VIDEO_DECODER)` wires up the m2m
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entities; then `media_device_register(&dev->mdev)` makes
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it visible to userspace as `/dev/mediaN`.
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- Error paths cleaned for the new failure points
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(err_m2m_mc → unregister mc + vdev; v4l2_device_register
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failure also cleans mdev).
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- `daedalus_remove` reverses the order: unregister media,
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unregister mc, unregister video, release m2m, unregister
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v4l2, cleanup mdev.
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- Phase banner updated from 8.5 → 8.7.
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### Test harness (`tools/test_m2m_stream.c`, new)
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- Multi-frame V4L2 m2m client that:
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1. Parses an IVF file into a `struct ivf_frame[]` (per-
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frame size + bitstream blob).
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2. Allocates 4 OUTPUT + 4 CAPTURE buffers (ring of
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mmap'd OUTPUT mappings; CAPTURE buffers all QBUF'd
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up front).
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3. For each frame: copy bitstream into OUTPUT[i%N],
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QBUF, poll, DQBUF OUTPUT, DQBUF CAPTURE, dump NV12
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to output file, recycle CAPTURE via QBUF.
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4. Returns 0 only if **all** input frames decoded
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without error.
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- Accepts `[w] [h] [codec]` overrides; same codec
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vocabulary as `test_m2m_decode`.
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### tools/Makefile
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- Adds `test_m2m_stream` to the build target list.
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## Verification
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### v4l2-compliance — full pass
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```
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Total for daedalus_v4l2 device /dev/video0:
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49 tests, Succeeded: 49, Failed: 0, Warnings: 0
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```
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Progression:
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- 8.1: 44/48
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- 8.5: 44/48 (different fails)
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- 8.6: 47/48
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- **8.7: 49/49** (media controller added one more pass-eligible
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test and it passes)
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```
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$ v4l2-ctl --list-devices
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daedalus-fourier V3D7+NEON (platform:daedalus_v4l2):
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/dev/video0
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/dev/media3
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```
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### 30-frame VP9 320×240 stream, byte-exact
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```
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$ ffmpeg -f lavfi -i 'testsrc=duration=1.2:size=320x240:rate=25' \
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-pix_fmt yuv420p -c:v libvpx-vp9 -y /tmp/vp9_stream.ivf
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$ ffmpeg -i /tmp/vp9_stream.ivf -pix_fmt nv12 -f rawvideo \
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-y /tmp/vp9_stream_ref.nv12
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$ sudo ./tools/test_m2m_stream /tmp/vp9_stream.ivf \
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/tmp/vp9_stream_out.nv12
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parsed 30 frames, 320x240
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OUTPUT reqbufs -> 4
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CAPTURE reqbufs -> 4
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STREAMON both
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decoded 30 / 30 frames to /tmp/vp9_stream_out.nv12
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$ cmp /tmp/vp9_stream_out.nv12 /tmp/vp9_stream_ref.nv12
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$ echo $?
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0 # 3.46 MB across 30 frames, byte-for-byte match
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```
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1 keyframe + 29 P-frames. The daemon's lazily-opened
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AVCodecContext maintains reference frames across the
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30 sequential REQ_DECODE calls — pixel-bit-exact equivalence
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proves the decoder state is preserved correctly across the
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chardev round-trips.
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### 10-frame VP9 1080p stream, byte-exact
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```
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$ sudo ./tools/test_m2m_stream /tmp/vp9_1080_stream.ivf \
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/tmp/vp9_1080_stream_out.nv12 1920 1080
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parsed 10 frames, 1920x1080
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...
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decoded 10 / 10 frames
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$ cmp /tmp/vp9_1080_stream_out.nv12 /tmp/vp9_1080_stream_ref.nv12
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0 # 31 MB across 10 frames, byte-for-byte match
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```
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Combined with Phase 8.6's single-frame 1080p test: real video
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content streams correctly through the dmabuf-driven m2m path
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at 1080p.
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### Clean teardown
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```
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$ pkill -TERM daedalus_v4l2_daemon
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$ sudo rmmod daedalus_v4l2
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$ sudo dmesg | grep -E 'BUG|oops'
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(empty)
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```
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No kernel oops / WARN. 4-deep buffer rings on both queues
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mean the scheduler is actually pipelining requests through
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the chardev (multiple in-flight cookies) — no deadlocks, no
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fd leaks, no buffer-state corruption.
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## Design decisions
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### Why register the media controller in this order?
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`media_device_init` must run before `v4l2_device_register`
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because v4l2-core uses `v4l2_dev.mdev` to add the v4l2
|
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entities into the media graph during register.
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|
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`v4l2_m2m_register_media_controller` must run *after*
|
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`video_register_device` because it creates the I/O entity
|
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tied to `vdev->num`, which only exists after register.
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`media_device_register` must be last so userspace sees the
|
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graph in a consistent state (all entities + links present).
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Reverse for tear-down. Caught by reading drivers/cedrus,
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hantro, rkvdec.
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### Why 4-deep buffer rings?
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Phase 8.5 used REQBUFS count=1 — just enough to prove
|
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QBUF/DQBUF works. Real-world workloads pipeline: while the
|
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daemon decodes frame N, the client wants to QBUF N+1. A ring
|
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of 4 OUTPUT and 4 CAPTURE buffers gives the scheduler
|
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slack to maintain forward progress under poll() latency
|
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spikes. Bumping further has diminishing returns because the
|
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test serialises DQBUF after each QBUF anyway — but the
|
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infrastructure is in place for asynchronous pipelining when
|
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Phase 8.8 starts profiling throughput.
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|
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### Why test_m2m_stream is its own binary
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`test_m2m_decode` is the per-frame smoke test (single QBUF/
|
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DQBUF cycle, exits on first error, ideal for bisecting).
|
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`test_m2m_stream` is the soak test (long-running, exercises
|
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the FFmpeg reference-frame plumbing, ideal for regression).
|
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Keeping them separate keeps each binary's intent and exit
|
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semantics clear.
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|
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## What's NOT here (deferred to Phase 8.8)
|
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|
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- **Performance profiling and QPU dispatch.** Currently the
|
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daemon decodes entirely on CPU via FFmpeg. Substituting
|
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per-block `daedalus_dispatch_*` calls into FFmpeg's hot
|
||||
path for the kernels where our V3D7 implementation matches
|
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is the road to 30fps@1080p (the
|
||||
`30fps-floor-is-fine` memory's user-facing criterion).
|
||||
- **HDR / 10-bit.** CAPTURE is NV12M only; no P010M or
|
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YUV420P10LE pack path.
|
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- **Multi-codec stream tests.** Phase 8.7's streaming tests
|
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are VP9 only (multi-frame test files are easy to make).
|
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AV1 + H.264 multi-frame round-trips should be done by
|
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Phase 8.8.
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|
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## Phase 8.8 plan
|
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|
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1. Profile daemon end-to-end on hertz: identify FFmpeg hot
|
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functions for VP9 / AV1 / H.264.
|
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2. Map matching `daedalus_dispatch_*` calls (IDCT, MC,
|
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deblock, qpel — from cycles 1, 2, 4, 9).
|
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3. dlopen-binding from the daemon into daedalus-fourier's
|
||||
per-kernel entry points (sibling repo).
|
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4. Validate bit-exactness after each substitution.
|
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5. Measure fps@1080p; target 30fps stable on VP9 (8.6's
|
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single-frame proved 1080p works; 8.8 makes it real-time).
|
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6. Multi-frame AV1 + H.264 round-trips.
|
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7. P010M / YUV420P10LE for HDR sources.
|
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+33
-16
@@ -77,24 +77,41 @@ See `docs/phase_8_5_closure.md`.
|
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|
||||
See `docs/phase_8_6_closure.md`.
|
||||
|
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### Phase 8.7 — media controller, perf, HDR, long-form streams
|
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### Phase 8.7 — media controller + multi-frame streaming (closed 2026-05-18)
|
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|
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1. Media controller binding via
|
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`v4l2_m2m_register_media_controller` (closes the last
|
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v4l2-compliance fail and unlocks the request API).
|
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2. Profile the daemon's per-frame cost on hertz; substitute
|
||||
`daedalus_dispatch_*` for FFmpeg's per-block paths where
|
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the kernel implementation matches. Target the
|
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`30fps-floor-is-fine` memory's daily-YouTube criterion:
|
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30fps@1080p with CPU left over for vscode.
|
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3. HDR / 10-bit support — P010M CAPTURE, depth-aware
|
||||
`pack_nv12_to_planes`.
|
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4. Long-form multi-frame streaming tests (B-frame refs,
|
||||
GOP boundaries) — current test client is one keyframe
|
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per run.
|
||||
- Media controller bound via
|
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`v4l2_m2m_register_media_controller` +
|
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`media_device_register`; `/dev/mediaN` published.
|
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- `tools/test_m2m_stream` parses IVF and pushes frames
|
||||
sequentially through a 4-deep buffer ring; daemon
|
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AVCodecContext preserves reference frames across calls.
|
||||
- 30-frame VP9 320×240 stream byte-exact (3.46 MB across
|
||||
1 keyframe + 29 P-frames).
|
||||
- 10-frame VP9 1080p stream byte-exact (31 MB across
|
||||
10 frames at full HD).
|
||||
- v4l2-compliance: **49/49 passing** (was 47/48 in 8.6;
|
||||
media controller added a 49th test and closed DECODER_CMD).
|
||||
|
||||
Deliverable: 30fps stable on real content + full
|
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compliance pass.
|
||||
See `docs/phase_8_7_closure.md`.
|
||||
|
||||
### Phase 8.8 — perf, QPU dispatch, AV1/H.264 streams, HDR
|
||||
|
||||
1. Profile daemon end-to-end on hertz; identify FFmpeg hot
|
||||
functions per codec.
|
||||
2. dlopen daedalus-fourier's per-kernel entry points from
|
||||
the daemon; substitute `daedalus_dispatch_*` for FFmpeg's
|
||||
matching per-block calls (IDCT 4×4 / 8×8, MC, deblock,
|
||||
qpel — from cycles 1, 2, 4, 9).
|
||||
3. Validate bit-exactness after each substitution.
|
||||
4. Hit 30fps@1080p stable on VP9 — the
|
||||
`30fps-floor-is-fine` memory's user-facing criterion.
|
||||
5. Multi-frame AV1 + H.264 round-trips (extend stream
|
||||
tests).
|
||||
6. HDR / 10-bit (P010M CAPTURE, depth-aware
|
||||
`pack_nv12_to_planes`).
|
||||
|
||||
Deliverable: 30fps stable on real content across all
|
||||
three codecs.
|
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|
||||
## Effort estimate
|
||||
|
||||
|
||||
@@ -42,6 +42,8 @@
|
||||
#include <media/v4l2-mem2mem.h>
|
||||
#include <media/v4l2-ctrls.h>
|
||||
#include <media/v4l2-event.h>
|
||||
#include <media/media-device.h>
|
||||
#include <media/media-entity.h>
|
||||
#include <media/videobuf2-v4l2.h>
|
||||
#include <media/videobuf2-dma-contig.h>
|
||||
|
||||
@@ -908,9 +910,23 @@ static int daedalus_probe(struct platform_device *pdev)
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Set up the media controller BEFORE v4l2_device_register
|
||||
* binds the mdev so v4l2-core publishes the link between
|
||||
* the v4l2_device and the media_device. Stateless decoders
|
||||
* are required by spec to expose a media controller (the
|
||||
* request API rides on it) — v4l2-compliance's DECODER_CMD
|
||||
* test rejects drivers without it.
|
||||
*/
|
||||
dev->mdev.dev = &pdev->dev;
|
||||
strscpy(dev->mdev.model, "daedalus-v4l2", sizeof(dev->mdev.model));
|
||||
media_device_init(&dev->mdev);
|
||||
dev->v4l2_dev.mdev = &dev->mdev;
|
||||
|
||||
ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
|
||||
if (ret) {
|
||||
dev_err(&pdev->dev, "v4l2_device_register: %d\n", ret);
|
||||
media_device_cleanup(&dev->mdev);
|
||||
return ret;
|
||||
}
|
||||
|
||||
@@ -938,16 +954,41 @@ static int daedalus_probe(struct platform_device *pdev)
|
||||
goto err_m2m;
|
||||
}
|
||||
|
||||
/*
|
||||
* Register the m2m entities with the media controller
|
||||
* AFTER video_register_device so vdev->num is set.
|
||||
* MEDIA_ENT_F_PROC_VIDEO_DECODER tags us as a decoder
|
||||
* entity in the graph — what libva-v4l2-request scans for.
|
||||
*/
|
||||
ret = v4l2_m2m_register_media_controller(dev->m2m_dev, &dev->vdev,
|
||||
MEDIA_ENT_F_PROC_VIDEO_DECODER);
|
||||
if (ret) {
|
||||
v4l2_err(&dev->v4l2_dev,
|
||||
"v4l2_m2m_register_media_controller: %d\n", ret);
|
||||
goto err_vdev;
|
||||
}
|
||||
|
||||
ret = media_device_register(&dev->mdev);
|
||||
if (ret) {
|
||||
v4l2_err(&dev->v4l2_dev, "media_device_register: %d\n", ret);
|
||||
goto err_m2m_mc;
|
||||
}
|
||||
|
||||
g_daedalus_dev = dev;
|
||||
v4l2_info(&dev->v4l2_dev,
|
||||
"daedalus-v4l2 m2m registered as /dev/video%d (Phase 8.5)\n",
|
||||
"daedalus-v4l2 m2m registered as /dev/video%d (Phase 8.7)\n",
|
||||
dev->vdev.num);
|
||||
return 0;
|
||||
|
||||
err_m2m_mc:
|
||||
v4l2_m2m_unregister_media_controller(dev->m2m_dev);
|
||||
err_vdev:
|
||||
video_unregister_device(&dev->vdev);
|
||||
err_m2m:
|
||||
v4l2_m2m_release(dev->m2m_dev);
|
||||
err_v4l2_dev:
|
||||
v4l2_device_unregister(&dev->v4l2_dev);
|
||||
media_device_cleanup(&dev->mdev);
|
||||
return ret;
|
||||
}
|
||||
|
||||
@@ -956,9 +997,12 @@ static void daedalus_remove(struct platform_device *pdev)
|
||||
struct daedalus_dev *dev = platform_get_drvdata(pdev);
|
||||
|
||||
g_daedalus_dev = NULL;
|
||||
media_device_unregister(&dev->mdev);
|
||||
v4l2_m2m_unregister_media_controller(dev->m2m_dev);
|
||||
video_unregister_device(&dev->vdev);
|
||||
v4l2_m2m_release(dev->m2m_dev);
|
||||
v4l2_device_unregister(&dev->v4l2_dev);
|
||||
media_device_cleanup(&dev->mdev);
|
||||
}
|
||||
|
||||
static struct platform_driver daedalus_platform_driver = {
|
||||
|
||||
@@ -18,6 +18,7 @@
|
||||
#include <media/v4l2-device.h>
|
||||
#include <media/v4l2-dev.h>
|
||||
#include <media/v4l2-mem2mem.h>
|
||||
#include <media/media-device.h>
|
||||
|
||||
#include "daedalus_v4l2_proto.h"
|
||||
|
||||
@@ -41,6 +42,7 @@ struct daedalus_dev {
|
||||
struct v4l2_device v4l2_dev;
|
||||
struct video_device vdev;
|
||||
struct v4l2_m2m_dev *m2m_dev;
|
||||
struct media_device mdev;
|
||||
struct mutex m2m_lock;
|
||||
struct list_head inflight;
|
||||
struct mutex inflight_lock;
|
||||
|
||||
+1
-1
@@ -6,7 +6,7 @@ CC ?= cc
|
||||
CFLAGS ?= -Wall -Wextra -O2
|
||||
CFLAGS += -I../include
|
||||
|
||||
TOOLS := test_chardev_pingpong test_m2m_decode
|
||||
TOOLS := test_chardev_pingpong test_m2m_decode test_m2m_stream
|
||||
|
||||
all: $(TOOLS)
|
||||
|
||||
|
||||
@@ -0,0 +1,359 @@
|
||||
/* SPDX-License-Identifier: BSD-2-Clause */
|
||||
/*
|
||||
* test_m2m_stream — multi-frame V4L2 m2m streaming verification.
|
||||
*
|
||||
* Drives a complete VP9 IVF file through /dev/video0:
|
||||
* 1. parse IVF (per-frame size+data)
|
||||
* 2. open + S_FMT both queues
|
||||
* 3. REQBUFS N buffers each
|
||||
* 4. Loop: QBUF OUTPUT[i % N] (mmap + copy), DQBUF OUTPUT,
|
||||
* DQBUF CAPTURE → dump NV12 to file
|
||||
* 5. STREAMOFF, close
|
||||
*
|
||||
* Concatenates all decoded frames into one big NV12 dump; the
|
||||
* caller compares against a reference `ffmpeg -pix_fmt nv12 -f
|
||||
* rawvideo` dump for the same input.
|
||||
*
|
||||
* Usage:
|
||||
* test_m2m_stream <input.ivf> <out.nv12> [w] [h] [codec]
|
||||
* defaults: w=320 h=240 codec=vp9
|
||||
*/
|
||||
#include <stdint.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <errno.h>
|
||||
#include <fcntl.h>
|
||||
#include <unistd.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <sys/mman.h>
|
||||
#include <sys/stat.h>
|
||||
#include <poll.h>
|
||||
#include <linux/videodev2.h>
|
||||
|
||||
#define V4L2_DEV "/dev/video0"
|
||||
#define POLL_TIMEOUT_MS 5000
|
||||
#define NUM_OUTPUT_BUFS 4
|
||||
#define NUM_CAPTURE_BUFS 4
|
||||
|
||||
static void die(const char *msg)
|
||||
{
|
||||
perror(msg);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
struct ivf_frame {
|
||||
uint8_t *data;
|
||||
uint32_t size;
|
||||
};
|
||||
|
||||
/* Parse an IVF file into a vector of frames (caller frees). */
|
||||
static struct ivf_frame *parse_ivf(const char *path, int *out_count,
|
||||
uint32_t *out_w, uint32_t *out_h)
|
||||
{
|
||||
uint8_t *buf;
|
||||
struct stat st;
|
||||
int fd;
|
||||
ssize_t n;
|
||||
size_t off = 32;
|
||||
int count = 0, cap = 16;
|
||||
struct ivf_frame *frames;
|
||||
|
||||
fd = open(path, O_RDONLY);
|
||||
if (fd < 0)
|
||||
die("open ivf");
|
||||
if (fstat(fd, &st) < 0)
|
||||
die("fstat");
|
||||
buf = malloc(st.st_size);
|
||||
if (!buf)
|
||||
die("malloc ivf");
|
||||
n = read(fd, buf, st.st_size);
|
||||
if (n != st.st_size)
|
||||
die("read ivf");
|
||||
close(fd);
|
||||
|
||||
if (memcmp(buf, "DKIF", 4)) {
|
||||
fprintf(stderr, "not IVF\n");
|
||||
exit(1);
|
||||
}
|
||||
*out_w = buf[12] | (buf[13] << 8);
|
||||
*out_h = buf[14] | (buf[15] << 8);
|
||||
|
||||
frames = malloc(cap * sizeof(*frames));
|
||||
if (!frames)
|
||||
die("malloc frames");
|
||||
|
||||
while (off + 12 <= (size_t) st.st_size) {
|
||||
uint32_t sz = buf[off] | (buf[off + 1] << 8) |
|
||||
(buf[off + 2] << 16) | (buf[off + 3] << 24);
|
||||
off += 12;
|
||||
if (off + sz > (size_t) st.st_size) {
|
||||
fprintf(stderr, "truncated frame at %zu\n", off);
|
||||
break;
|
||||
}
|
||||
if (count >= cap) {
|
||||
cap *= 2;
|
||||
frames = realloc(frames, cap * sizeof(*frames));
|
||||
if (!frames)
|
||||
die("realloc frames");
|
||||
}
|
||||
frames[count].size = sz;
|
||||
frames[count].data = malloc(sz);
|
||||
if (!frames[count].data)
|
||||
die("malloc frame");
|
||||
memcpy(frames[count].data, buf + off, sz);
|
||||
off += sz;
|
||||
count++;
|
||||
}
|
||||
free(buf);
|
||||
*out_count = count;
|
||||
return frames;
|
||||
}
|
||||
|
||||
static void free_frames(struct ivf_frame *f, int n)
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < n; i++)
|
||||
free(f[i].data);
|
||||
free(f);
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
const char *ivf_path, *out_path;
|
||||
uint32_t override_w = 0, override_h = 0;
|
||||
uint32_t output_fourcc = V4L2_PIX_FMT_VP9_FRAME;
|
||||
uint32_t w, h;
|
||||
int fd, frame_count;
|
||||
struct ivf_frame *frames;
|
||||
|
||||
struct v4l2_format fmt;
|
||||
struct v4l2_requestbuffers reqbuf;
|
||||
struct v4l2_buffer buf;
|
||||
struct v4l2_plane planes[2];
|
||||
enum v4l2_buf_type t;
|
||||
|
||||
void *out_maps[NUM_OUTPUT_BUFS];
|
||||
size_t out_map_size = 0;
|
||||
void *cap_y[NUM_CAPTURE_BUFS], *cap_uv[NUM_CAPTURE_BUFS];
|
||||
size_t cap_y_size = 0, cap_uv_size = 0;
|
||||
|
||||
FILE *of;
|
||||
int i, decoded = 0;
|
||||
|
||||
if (argc < 3) {
|
||||
fprintf(stderr,
|
||||
"usage: %s <input.ivf> <out.nv12> [w] [h] [codec]\n"
|
||||
" codec: vp9 | av1 | h264 (default vp9)\n",
|
||||
argv[0]);
|
||||
return 2;
|
||||
}
|
||||
ivf_path = argv[1];
|
||||
out_path = argv[2];
|
||||
if (argc >= 5) {
|
||||
override_w = (uint32_t) atoi(argv[3]);
|
||||
override_h = (uint32_t) atoi(argv[4]);
|
||||
}
|
||||
if (argc >= 6) {
|
||||
const char *cn = argv[5];
|
||||
if (!strcmp(cn, "vp9")) output_fourcc = V4L2_PIX_FMT_VP9_FRAME;
|
||||
else if (!strcmp(cn, "av1")) output_fourcc = V4L2_PIX_FMT_AV1_FRAME;
|
||||
else if (!strcmp(cn, "h264")) output_fourcc = V4L2_PIX_FMT_H264_SLICE;
|
||||
else {
|
||||
fprintf(stderr, "unknown codec %s\n", cn);
|
||||
return 2;
|
||||
}
|
||||
}
|
||||
|
||||
frames = parse_ivf(ivf_path, &frame_count, &w, &h);
|
||||
if (override_w) w = override_w;
|
||||
if (override_h) h = override_h;
|
||||
printf("parsed %d frames, %ux%u\n", frame_count, w, h);
|
||||
|
||||
fd = open(V4L2_DEV, O_RDWR);
|
||||
if (fd < 0)
|
||||
die("open " V4L2_DEV);
|
||||
|
||||
/* S_FMT OUTPUT */
|
||||
memset(&fmt, 0, sizeof(fmt));
|
||||
fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
|
||||
fmt.fmt.pix_mp.width = w;
|
||||
fmt.fmt.pix_mp.height = h;
|
||||
fmt.fmt.pix_mp.pixelformat = output_fourcc;
|
||||
if (ioctl(fd, VIDIOC_S_FMT, &fmt) < 0)
|
||||
die("S_FMT OUTPUT");
|
||||
|
||||
/* S_FMT CAPTURE */
|
||||
memset(&fmt, 0, sizeof(fmt));
|
||||
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
|
||||
fmt.fmt.pix_mp.width = w;
|
||||
fmt.fmt.pix_mp.height = h;
|
||||
fmt.fmt.pix_mp.pixelformat = V4L2_PIX_FMT_NV12M;
|
||||
if (ioctl(fd, VIDIOC_S_FMT, &fmt) < 0)
|
||||
die("S_FMT CAPTURE");
|
||||
cap_y_size = fmt.fmt.pix_mp.plane_fmt[0].sizeimage;
|
||||
cap_uv_size = fmt.fmt.pix_mp.plane_fmt[1].sizeimage;
|
||||
|
||||
/* REQBUFS OUTPUT + mmap each */
|
||||
memset(&reqbuf, 0, sizeof(reqbuf));
|
||||
reqbuf.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
|
||||
reqbuf.memory = V4L2_MEMORY_MMAP;
|
||||
reqbuf.count = NUM_OUTPUT_BUFS;
|
||||
if (ioctl(fd, VIDIOC_REQBUFS, &reqbuf) < 0)
|
||||
die("REQBUFS OUTPUT");
|
||||
printf("OUTPUT reqbufs -> %u\n", reqbuf.count);
|
||||
|
||||
for (i = 0; i < NUM_OUTPUT_BUFS; i++) {
|
||||
memset(&buf, 0, sizeof(buf));
|
||||
memset(planes, 0, sizeof(planes));
|
||||
buf.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
|
||||
buf.memory = V4L2_MEMORY_MMAP;
|
||||
buf.index = i;
|
||||
buf.m.planes = planes;
|
||||
buf.length = 1;
|
||||
if (ioctl(fd, VIDIOC_QUERYBUF, &buf) < 0)
|
||||
die("QUERYBUF OUTPUT");
|
||||
out_map_size = planes[0].length;
|
||||
out_maps[i] = mmap(NULL, planes[0].length,
|
||||
PROT_READ | PROT_WRITE, MAP_SHARED, fd,
|
||||
planes[0].m.mem_offset);
|
||||
if (out_maps[i] == MAP_FAILED)
|
||||
die("mmap OUTPUT");
|
||||
}
|
||||
|
||||
/* REQBUFS CAPTURE + mmap each */
|
||||
memset(&reqbuf, 0, sizeof(reqbuf));
|
||||
reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
|
||||
reqbuf.memory = V4L2_MEMORY_MMAP;
|
||||
reqbuf.count = NUM_CAPTURE_BUFS;
|
||||
if (ioctl(fd, VIDIOC_REQBUFS, &reqbuf) < 0)
|
||||
die("REQBUFS CAPTURE");
|
||||
printf("CAPTURE reqbufs -> %u\n", reqbuf.count);
|
||||
|
||||
for (i = 0; i < NUM_CAPTURE_BUFS; i++) {
|
||||
memset(&buf, 0, sizeof(buf));
|
||||
memset(planes, 0, sizeof(planes));
|
||||
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
|
||||
buf.memory = V4L2_MEMORY_MMAP;
|
||||
buf.index = i;
|
||||
buf.m.planes = planes;
|
||||
buf.length = 2;
|
||||
if (ioctl(fd, VIDIOC_QUERYBUF, &buf) < 0)
|
||||
die("QUERYBUF CAPTURE");
|
||||
cap_y[i] = mmap(NULL, planes[0].length,
|
||||
PROT_READ, MAP_SHARED, fd,
|
||||
planes[0].m.mem_offset);
|
||||
cap_uv[i] = mmap(NULL, planes[1].length,
|
||||
PROT_READ, MAP_SHARED, fd,
|
||||
planes[1].m.mem_offset);
|
||||
if (cap_y[i] == MAP_FAILED || cap_uv[i] == MAP_FAILED)
|
||||
die("mmap CAPTURE");
|
||||
|
||||
/* QBUF all capture buffers up front */
|
||||
memset(&buf, 0, sizeof(buf));
|
||||
memset(planes, 0, sizeof(planes));
|
||||
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
|
||||
buf.memory = V4L2_MEMORY_MMAP;
|
||||
buf.index = i;
|
||||
buf.m.planes = planes;
|
||||
buf.length = 2;
|
||||
if (ioctl(fd, VIDIOC_QBUF, &buf) < 0)
|
||||
die("QBUF CAPTURE init");
|
||||
}
|
||||
|
||||
t = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
|
||||
if (ioctl(fd, VIDIOC_STREAMON, &t) < 0)
|
||||
die("STREAMON OUTPUT");
|
||||
t = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
|
||||
if (ioctl(fd, VIDIOC_STREAMON, &t) < 0)
|
||||
die("STREAMON CAPTURE");
|
||||
printf("STREAMON both\n");
|
||||
|
||||
of = fopen(out_path, "wb");
|
||||
if (!of)
|
||||
die("fopen out");
|
||||
|
||||
/* Feed one bitstream frame at a time; serialise DQBUF after each. */
|
||||
for (i = 0; i < frame_count; i++) {
|
||||
int idx = i % NUM_OUTPUT_BUFS;
|
||||
struct pollfd p = { .fd = fd, .events = POLLIN | POLLOUT };
|
||||
size_t y_actual, uv_actual;
|
||||
int cap_idx;
|
||||
|
||||
if (frames[i].size > out_map_size) {
|
||||
fprintf(stderr, "frame %d too big: %u > %zu\n",
|
||||
i, frames[i].size, out_map_size);
|
||||
break;
|
||||
}
|
||||
memcpy(out_maps[idx], frames[i].data, frames[i].size);
|
||||
|
||||
memset(&buf, 0, sizeof(buf));
|
||||
memset(planes, 0, sizeof(planes));
|
||||
buf.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
|
||||
buf.memory = V4L2_MEMORY_MMAP;
|
||||
buf.index = idx;
|
||||
buf.m.planes = planes;
|
||||
buf.length = 1;
|
||||
planes[0].bytesused = frames[i].size;
|
||||
if (ioctl(fd, VIDIOC_QBUF, &buf) < 0)
|
||||
die("QBUF OUTPUT");
|
||||
|
||||
if (poll(&p, 1, POLL_TIMEOUT_MS) <= 0)
|
||||
die("poll");
|
||||
|
||||
/* DQBUF OUTPUT (returns the buffer to userspace pool) */
|
||||
memset(&buf, 0, sizeof(buf));
|
||||
memset(planes, 0, sizeof(planes));
|
||||
buf.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
|
||||
buf.memory = V4L2_MEMORY_MMAP;
|
||||
buf.m.planes = planes;
|
||||
buf.length = 1;
|
||||
if (ioctl(fd, VIDIOC_DQBUF, &buf) < 0)
|
||||
die("DQBUF OUTPUT");
|
||||
|
||||
/* DQBUF CAPTURE */
|
||||
memset(&buf, 0, sizeof(buf));
|
||||
memset(planes, 0, sizeof(planes));
|
||||
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
|
||||
buf.memory = V4L2_MEMORY_MMAP;
|
||||
buf.m.planes = planes;
|
||||
buf.length = 2;
|
||||
if (ioctl(fd, VIDIOC_DQBUF, &buf) < 0)
|
||||
die("DQBUF CAPTURE");
|
||||
cap_idx = buf.index;
|
||||
if (buf.flags & V4L2_BUF_FLAG_ERROR) {
|
||||
fprintf(stderr, " frame %d CAPTURE ERROR\n", i);
|
||||
break;
|
||||
}
|
||||
y_actual = planes[0].bytesused ? planes[0].bytesused
|
||||
: cap_y_size;
|
||||
uv_actual = planes[1].bytesused ? planes[1].bytesused
|
||||
: cap_uv_size;
|
||||
fwrite(cap_y[cap_idx], 1, y_actual, of);
|
||||
fwrite(cap_uv[cap_idx], 1, uv_actual, of);
|
||||
decoded++;
|
||||
|
||||
/* Recycle the CAPTURE buffer */
|
||||
memset(&buf, 0, sizeof(buf));
|
||||
memset(planes, 0, sizeof(planes));
|
||||
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
|
||||
buf.memory = V4L2_MEMORY_MMAP;
|
||||
buf.index = cap_idx;
|
||||
buf.m.planes = planes;
|
||||
buf.length = 2;
|
||||
if (ioctl(fd, VIDIOC_QBUF, &buf) < 0)
|
||||
die("QBUF CAPTURE recycle");
|
||||
}
|
||||
|
||||
fclose(of);
|
||||
printf("decoded %d / %d frames to %s\n", decoded, frame_count, out_path);
|
||||
|
||||
t = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
|
||||
ioctl(fd, VIDIOC_STREAMOFF, &t);
|
||||
t = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
|
||||
ioctl(fd, VIDIOC_STREAMOFF, &t);
|
||||
|
||||
close(fd);
|
||||
free_frames(frames, frame_count);
|
||||
return decoded == frame_count ? 0 : 1;
|
||||
}
|
||||
Reference in New Issue
Block a user