Date:   Sat, 08 Feb 2020 16:08:46 -0500
From:   Nicolas Dufresne <nicolas@...fresne.ca>
To:     Neil Armstrong <narmstrong@...libre.com>, mchehab@...nel.org,
        hans.verkuil@...co.com
Cc:     linux-media@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/4] media: meson: vdec: Add compliant H264 support

Le jeudi 06 février 2020 à 08:57 +0100, Neil Armstrong a écrit :
> Hi Nico,
> 
> On 01/02/2020 16:38, Nicolas Dufresne wrote:
> > Le samedi 01 février 2020 à 10:34 -0500, Nicolas Dufresne a écrit :
> > > Le jeudi 16 janvier 2020 à 14:30 +0100, Neil Armstrong a écrit :
> > > > Hello,
> > > > 
> > > > This patch series aims to bring H.264 support as well as compliance update
> > > > to the amlogic stateful video decoder driver.
> > > > 
> > > > The issue in the V1 patchset at [1] is solved by patch #1 following comments
> > > > and requirements from hans. It moves the full draining & stopped state tracking
> > > > and handling from vicodec to core v4l2-mem2mem.
> > > > 
> > > > The vicodec changes still passes the v4l2-utils "media-test" tests, log at [5]:
> > > > [...]
> > > > vicodec media controller compliance tests
> > > > 
> > > > Thu Jan 16 13:00:56 UTC 2020
> > > > v4l2-compliance SHA: 7ead0e1856b89f2e19369af452bb03fd0cd16793, 64 bits
> > > > [...]
> > > > Summary:
> > > 
> > > I've minimally tested this serie with GStreamer master. Play pause and
> > > seek seems to work reliably now. It's a little bit spamy with
> > > bbb_sunflower_1080p_30fps_normal.mp4:
> > > 
> > > [  725.304663] meson-vdec c8820000.video-codec: VIFIFO usage (16777763) > VIFIFO size (16777216)
> > > 
> > > But there is no visual artifact or performance degradation.
> > > 
> > > Tested-by: Nicolas Dufresne <nicolas@...fresne.ca>
> > 
> > Sorry, I just notice that with kmssink, seek is broken. The kernel
> > reports a series of:
> > 
> >   [ 1065.046970] meson-vdec c8820000.video-codec: Buffer 0 done but it doesn't exist in m2m_ctx
> 
> Thanks a lot for testing, can you share your setup (gst version, gst pipeline, stream...), thanks !

I'm currently running Fedora 31 (Debian unstable should provide the
same), with the stock GStreamer 1.16.1. And doing playback with:
  
 gst-play-1.0 Videos/bbb_sunflower_1080p_30fps_normal.mp4 --videosink="kmssink" --flags=video

With this player, you can seek with the arrows (left/right), or go back
to the start using 0 key. When you seek, the streaming stalls. If you
switch the --videosink to fakevideosink as an example, seeking works
perfectly, and kernel does not complain anymore. Same if you don't use
a zero-copy path, like fbdevsink.

> 
> Neil
> 
> > > > Total for vicodec device /dev/media3: 7, Succeeded: 7, Failed: 0, Warnings: 0
> > > > Total for vicodec device /dev/video13: 51, Succeeded: 51, Failed: 0, Warnings: 0
> > > > Total for vicodec device /dev/video14: 51, Succeeded: 51, Failed: 0, Warnings: 0
> > > > Total for vicodec device /dev/video14: 51, Succeeded: 51, Failed: 0, Warnings: 0
> > > > Total for vicodec device /dev/video14: 51, Succeeded: 51, Failed: 0, Warnings: 0
> > > > Total for vicodec device /dev/video14: 51, Succeeded: 51, Failed: 0, Warnings: 0
> > > > Total for vicodec device /dev/video14: 51, Succeeded: 51, Failed: 0, Warnings: 0
> > > > Total for vicodec device /dev/video14: 51, Succeeded: 51, Failed: 0, Warnings: 0
> > > > 
> > > > Final Summary: 364, Succeeded: 364, Failed: 0, Warnings: 0
> > > > Thu Jan 16 13:02:59 UTC 2020
> > > > 
> > > > With this, it also passes vdec v4l2-compliance with H264 streaming on Amlogic G12A
> > > > and Amlogic SM1 SoCs successfully.
> > > > 
> > > > The compliance log is:
> > > > # v4l2-compliance --stream-from-hdr test-25fps.h264.hdr -s
> > > > v4l2-compliance SHA: 7ead0e1856b89f2e19369af452bb03fd0cd16793, 64 bits
> > > > 
> > > > Compliance test for meson-vdec device /dev/video0:
> > > > 
> > > > Driver Info:
> > > > 	Driver name      : meson-vdec
> > > > 	Card type        : Amlogic Video Decoder
> > > > 	Bus info         : platform:meson-vdec
> > > > 	Driver version   : 5.5.0
> > > > 	Capabilities     : 0x84204000
> > > > 		Video Memory-to-Memory Multiplanar
> > > > 		Streaming
> > > > 		Extended Pix Format
> > > > 		Device Capabilities
> > > > 	Device Caps      : 0x04204000
> > > > 		Video Memory-to-Memory Multiplanar
> > > > 		Streaming
> > > > 		Extended Pix Format
> > > > 	Detected Stateful Decoder
> > > > 
> > > > Required ioctls:
> > > > 	test VIDIOC_QUERYCAP: OK
> > > > 
> > > > Allow for multiple opens:
> > > > 	test second /dev/video19 open: OK
> > > > 	test VIDIOC_QUERYCAP: OK
> > > > 	test VIDIOC_G/S_PRIORITY: OK
> > > > 	test for unlimited opens: OK
> > > > 
> > > > Debug ioctls:
> > > > 	test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
> > > > 	test VIDIOC_LOG_STATUS: OK (Not Supported)
> > > > 
> > > > Input ioctls:
> > > > 	test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
> > > > 	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
> > > > 	test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
> > > > 	test VIDIOC_ENUMAUDIO: OK (Not Supported)
> > > > 	test VIDIOC_G/S/ENUMINPUT: OK (Not Supported)
> > > > 	test VIDIOC_G/S_AUDIO: OK (Not Supported)
> > > > 	Inputs: 0 Audio Inputs: 0 Tuners: 0
> > > > 
> > > > Output ioctls:
> > > > 	test VIDIOC_G/S_MODULATOR: OK (Not Supported)
> > > > 	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
> > > > 	test VIDIOC_ENUMAUDOUT: OK (Not Supported)
> > > > 	test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
> > > > 	test VIDIOC_G/S_AUDOUT: OK (Not Supported)
> > > > 	Outputs: 0 Audio Outputs: 0 Modulators: 0
> > > > 
> > > > Input/Output configuration ioctls:
> > > > 	test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
> > > > 	test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
> > > > 	test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
> > > > 	test VIDIOC_G/S_EDID: OK (Not Supported)
> > > > 
> > > > Control ioctls:
> > > > 	test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
> > > > 	test VIDIOC_QUERYCTRL: OK
> > > > 	test VIDIOC_G/S_CTRL: OK
> > > > 	test VIDIOC_G/S/TRY_EXT_CTRLS: OK
> > > > 	test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
> > > > 	test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
> > > > 	Standard Controls: 2 Private Controls: 0
> > > > 
> > > > Format ioctls:
> > > > 	test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
> > > > 	test VIDIOC_G/S_PARM: OK (Not Supported)
> > > > 	test VIDIOC_G_FBUF: OK (Not Supported)
> > > > 	test VIDIOC_G_FMT: OK
> > > > 	test VIDIOC_TRY_FMT: OK
> > > > 	test VIDIOC_S_FMT: OK
> > > > 	test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
> > > > 	test Cropping: OK (Not Supported)
> > > > 	test Composing: OK (Not Supported)
> > > > 	test Scaling: OK (Not Supported)
> > > > 
> > > > Codec ioctls:
> > > > 	test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
> > > > 	test VIDIOC_G_ENC_INDEX: OK (Not Supported)
> > > > 	test VIDIOC_(TRY_)DECODER_CMD: OK
> > > > 
> > > > Buffer ioctls:
> > > > 	test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
> > > > 	test VIDIOC_EXPBUF: OK
> > > > 	test Requests: OK (Not Supported)
> > > > 
> > > > Test input 0:
> > > > 
> > > > Streaming ioctls:
> > > > 	test read/write: OK (Not Supported)
> > > > 	test blocking wait: OK
> > > > 	Video Capture Multiplanar: Captured 60 buffers    
> > > > 	test MMAP (select): OK
> > > > 	Video Capture Multiplanar: Captured 60 buffers    
> > > > 	test MMAP (epoll): OK
> > > > 	test USERPTR (select): OK (Not Supported)
> > > > 	test DMABUF: Cannot test, specify --expbuf-device
> > > > 
> > > > Total for meson-vdec device /dev/video0: 49, Succeeded: 49, Failed: 0, Warnings: 0
> > > > 
> > > > 
> > > > Changes since v3 at [3]:
> > > > - Fixed vicodec compliance
> > > > - Fixed vdec compliance with v4l2 state management
> > > > - fixed doc errors for v4l2-mem2mem.h
> > > > 
> > > > Changes since v2 at [2]:
> > > > - Move full draining & stopped state tracking into core v4l2-mem2mem
> > > > - Adapt vicodec to use the core v4l2-mem2mem draining & stopped state tracking
> > > > 
> > > > Changes since v1 at [1]:
> > > > - fixed output_size is never used reported by hans
> > > > - rebased on G12A and SM1 patches
> > > > - added handling of qbuf after STREAMON and STOP before enought buffer queued
> > > > 
> > > > [1] https://lore.kernel.org/linux-media/20191007145909.29979-1-mjourdan@baylibre.com
> > > > [2] https://lore.kernel.org/linux-media/20191126093733.32404-1-narmstrong@baylibre.com
> > > > [3] https://lore.kernel.org/linux-media/20191209122028.13714-1-narmstrong@baylibre.com
> > > > [4] https://people.freedesktop.org/~narmstrong/vicodec-compliance-7ead0e1856b89f2e19369af452bb03fd0cd16793-20200116.log
> > > > 
> > > > Maxime Jourdan (2):
> > > >   media: meson: vdec: bring up to compliance
> > > >   media: meson: vdec: add H.264 decoding support
> > > > 
> > > > Neil Armstrong (2):
> > > >   media: v4l2-mem2mem: handle draining, stopped and next-buf-is-last
> > > >     states
> > > >   media: vicodec: use v4l2-mem2mem draining, stopped and
> > > >     next-buf-is-last states handling
> > > > 
> > > >  drivers/media/platform/vicodec/vicodec-core.c | 162 ++----
> > > >  drivers/media/v4l2-core/v4l2-mem2mem.c        | 172 ++++++-
> > > >  drivers/staging/media/meson/vdec/Makefile     |   2 +-
> > > >  drivers/staging/media/meson/vdec/codec_h264.c | 482 ++++++++++++++++++
> > > >  drivers/staging/media/meson/vdec/codec_h264.h |  14 +
> > > >  drivers/staging/media/meson/vdec/esparser.c   |  58 +--
> > > >  drivers/staging/media/meson/vdec/vdec.c       |  89 ++--
> > > >  drivers/staging/media/meson/vdec/vdec.h       |  14 +-
> > > >  .../staging/media/meson/vdec/vdec_helpers.c   |  85 ++-
> > > >  .../staging/media/meson/vdec/vdec_helpers.h   |   6 +-
> > > >  .../staging/media/meson/vdec/vdec_platform.c  |  71 +++
> > > >  include/media/v4l2-mem2mem.h                  |  95 ++++
> > > >  12 files changed, 1021 insertions(+), 229 deletions(-)
> > > >  create mode 100644 drivers/staging/media/meson/vdec/codec_h264.c
> > > >  create mode 100644 drivers/staging/media/meson/vdec/codec_h264.h
> > > > 

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