How to do hardware decoding of video?

[mcerveny]

???

• downloaded and flashed bionic-lxde-rock64-0.7.9-1067-arm64.img
  
• downloaded free movie bbb-1920x1080-cfg06.mkv
  
• test run
  
  Code:

  $ ### alsa/plughw:CARD=I2S,DEV=0 audio output is analog jack
$ ### only 3 frames dropped (10 min video played), no errors, smooth video play
$ rkmpv --audio-device=alsa/plughw:CARD=I2S,DEV=0 bbb-1920x1080-cfg06.mkv
Playing: bbb-1920x1080-cfg06.mkv
(+) Video --vid=1 (*) (hevc 1920x1080 60.000fps)
(+) Audio --aid=1 (*) (aac 6ch 48000Hz)
[vo/gpu] Can't handle VT release - signal already used
[vo/gpu/opengl] Failed to set up VT switcher. Terminal switching will be unavailable.
[vo/gpu/opengl] Could not choose EGLConfig!
mpi: mpp version: Without VCS, under bleeding
AO: [alsa] 48000Hz stereo 2ch float
H265D_PARSER: No start code is found.
Using hardware decoding (rkmpp).
VO: [gpu] 1920x1080 drm_prime[nv12]
[vo/gpu] Using HW-overlay mode. No GL filtering is performed on the video!
AV: 00:10:34 / 00:10:34 (99%) A-V:  0.000 Dropped: 3
• verify video chain during video play
  
  Code:

  $ sudo bash

# ### verify rkvdec is active (eg. HW decode)
# cat /sys/kernel/debug/pm_genpd/pm_genpd_summary
domain                          status          slaves
    /device                                             runtime status
----------------------------------------------------------------------
pd_vpu                          off            
    /devices/platform/ff350800.iommu                    suspended
    /devices/platform/vpu_combo                         suspended
pd_video                        on              
    /devices/platform/ff360480.iommu                    active
    /devices/platform/ff360000.rkvdec                   active
pd_hevc                         on              
    /devices/platform/ff330200.iommu                    suspended
    /devices/platform/ff340800.iommu                    suspended
    /devices/platform/ff330000.h265e                    unsupported
    /devices/platform/ff340000.vepu                     unsupported

# ### default clock running without overclocking (not needed for 1080p)
# egrep 'armclk |aclk_rkvdec |cabac |vdec_core |ddrc ' /sys/kernel/debug/clk/clk_summary
             armclk                       0            0   408000000          0 0  
             aclk_rkvdec                  3            4   491519999          0 0  
          sclk_vdec_core                  2            3   300000000          0 0  
          sclk_vdec_cabac                 2            3   400000000          0 0  
          sclk_ddrc                       2            2   786000000          0 0  

# ### video is rendered to "win1-0" (on foreground, hw scaled from 1080p to monitor resolution), "win0-0" is Xorg with LXDE (on background)
# cat /sys/kernel/debug/dri/0/summary
VOP [ff370000.vop]: ACTIVE
    Connector: HDMI-A
    overlay_mode[0] bus_format[100a] output_mode[f] color_space[0]
    Display mode: 1280x1024p60
    clk[108000] real_clk[108000] type[48] flag[5]
    H: 1280 1328 1440 1688
    V: 1024 1025 1028 1066
    win0-0: ACTIVE
    format: AR24 little-endian (0x34325241) SDR[0] color_space[0]
    csc: y2r[0] r2r[0] r2y[0] csc mode[0]
    zpos: 1
    src: pos[0x0] rect[1280x1024]
    dst: pos[0x0] rect[1280x1024]
    buf[0]: addr: 0x000000000299b000 pitch: 5120 offset: 0
    win1-0: ACTIVE
    format: NV12 little-endian (0x3231564e) SDR[0] color_space[3]
    csc: y2r[1] r2r[0] r2y[0] csc mode[1]
    zpos: 0
    src: pos[0x0] rect[1920x1080]
    dst: pos[0x152] rect[1280x720]
    buf[0]: addr: 0x0000000003b6d000 pitch: 2304 offset: 0
    buf[1]: addr: 0x0000000003b6d000 pitch: 2304 offset: 2488320
    win2-0: DISABLED
    post: sdr2hdr[0] hdr2sdr[0]
    pre : sdr2hdr[0]
    post CSC: r2y[0] y2r[0] CSC mode[1]