mirror of
https://github.com/outbackdingo/UltraGrid.git
synced 2026-03-21 16:40:18 +00:00
0a57fc4faf
* format is now entered as a parameter string (-g <mode>) * expect currently buffers as big as needed (exactly one frame) TODO: revide if isn't possible to read whole buffer at once (ideally the memmapped one, and extract frames by hand) * now it is needed to set /sys/class/sdivideo/sdivideorxX/bufsize * bump to new driver (2.7.2)
574 lines
16 KiB
Plaintext
574 lines
16 KiB
Plaintext
README for the Master Linux Software Development Kit
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====================================================
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Table of Contents
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-----------------
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1. Introduction
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2. Products supported
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3. Identifying your board
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4. Changes in this version
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5. Installation
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6. Capturing an MPEG-2 transport stream over DVB ASI or SMPTE 310M
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7. Playing an MPEG-2 transport stream over DVB ASI or SMPTE 310M
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8. Capturing SMPTE 259M-C with SDI Master
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9. Playing SMPTE 259M-C with SDI Master
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10. Capturing 4:2:2 component digital video over SDI
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11. Capturing audio over SDI
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12. Playing 4:2:2 component digital video over SDI
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13. Playing audio over SDI
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14. Driver limitations and known bugs
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1. Introduction
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----------------
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This file is part of Linear Systems Ltd.'s Master Linux
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Software Development Kit. This kit includes kernel modules
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and several example programs. It is intended for
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Linux kernel 2.6.18 or higher.
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Additional documentation is in the doc directory.
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The latest version of this kit is available at <http://www.linsys.ca/>.
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For technical support, or to report bugs or errors in the documentation,
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contact <support@linsys.ca>.
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2. Products supported
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----------------------
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This SDK supports the following products:
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DVB Master Send
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DVB Master II Send
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DVB Master Receive (Rev. 3 board or higher only, see limitations below)
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DVB Master II Receive
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DVB Master FD
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DVB Master FD-U
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DVB Master FD-B
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DVB Master III Tx
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DVB Master III Rx
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DVB Master LP
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DVB Master Q/i
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SDI Master
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MultiMaster SDI-T / MultiMaster A/S
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MultiMaster SDI-R / MultiMaster S/A
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DVB Master Dual In
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ATSC Master II FD
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SDI Master LP
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DVB Master Q/o
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DVB Master Q/io
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DVB Master Q/i LP
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DVB Master Quad-2in2out
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SDI Master Q/o
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SDI Master Q/i
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DVB Master Quad-1in3out PCIe
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DVB Master Quad-3in1out PCIe
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DVB Master III Tx LP
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DVB Master III Rx LP
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QuadPort H/i
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VidPort SD/HD O
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VidPort SD/HD I
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3. Identifying your board
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--------------------------
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Both the DVB Master Send and DVB Master II Send are marked
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"DVB-ASI TRANSMITTER". The DVB Master II Send should have a
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small 8-pin chip labelled "Tx#", where # is the firmware version.
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Similarly, both the DVB Master Receive and DVB Master II Receive
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are marked "DVB-ASI RECEIVER". The DVB Master II Receive should have
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a small 8-pin chip labelled "Rx#", where # is the firmware version.
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The DVB Master FD is marked "DVB Master FD".
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The standard PID filtering version should have a small 8-pin chip
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labelled "FDPF##", where ## is the firmware version.
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The PID monitoring version should have
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a small 8-pin chip labelled "FDPM##", where ## is the firmware version.
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The firmware version of all boards is also added to the kernel log
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when each board is detected by the driver.
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This log is viewable with the "dmesg" command.
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In all cases, the board revision is marked on the board itself
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as "REV #".
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4. Changes in this version
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---------------------------
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See NEWS for user-visible changes.
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5. Installation
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----------------
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For complete installation instructions, read INSTALL.
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6. Capturing an MPEG-2 transport stream over DVB ASI or SMPTE 310M
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-------------------------------------------------------------------
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Connect a DVB ASI or SMPTE 310M source to your board's receive port
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with a 75 ohm cable.
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If there is a carrier detect LED on the receiver,
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it should light up.
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Assuming that you are using the first receive port
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discovered in the machine, view its configuration with
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asicfg /dev/asirx0
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Other interfaces may be viewed by providing the appropriate device file name.
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By default, the interface should be synchronizing on 188-byte packets.
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If you want to capture 204-byte packets, change the mode by typing
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asicfg -m2 /dev/asirx0
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as root.
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Use
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asicfg -h
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to view information about other options.
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Run the rxtest program by typing
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rxtest -s1 /dev/asirx0 test.ts
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to copy data from the first receiver to a file called test.ts and
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display status messages every second.
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If you receive an error message, make sure you have read permission
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on the device file. Press Ctrl+C to quit rxtest.
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7. Playing an MPEG-2 transport stream over DVB ASI or SMPTE 310M
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-----------------------------------------------------------------
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Connect a DVB ASI or SMPTE 310M receiver to your board's transmit port
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with a 75 ohm cable.
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If you have a board which can bypass the system and forward a
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received stream directly to the transmit port, you will have to
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disable the bypass. Assuming this is the first board detected by
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the dvbm.ko driver, view the bypass mode with
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mastercfg dvbm 0
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Other boards may be viewed by providing the appropriate device number.
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This feature is enabled by default, which will discard any data
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transmitted from the system. Disable the bypass by typing
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mastercfg -b1 dvbm 0
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as root.
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Assuming that you are using the first transmit port
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discovered in the machine, view its configuration with
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asicfg /dev/asitx0
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Other interfaces may be viewed by providing the appropriate device file name.
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By default, the interface assumes 188-byte packets.
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If you want to play a stream with 204-byte packets,
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change the mode by typing
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asicfg -m1 /dev/asitx0
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as root.
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Use
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asicfg -h
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to view information about other options.
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Use
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txcfg /dev/asitx0
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and select "Show transmitter capabilities"
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to view the capabilities of this interface.
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This information will be needed to correctly set the transmit bitrate
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for DVB ASI.
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For SMPTE 310M, a transport stream file may be transmitted with
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txtest /dev/asitx0 < test.ts
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If you don't have a file, it is possible to transmit a stream
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of MPEG-2 null packets with
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mknull | txtest /dev/asitx0
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If you receive an error message, make sure you have write permission
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on the device file. Press Ctrl+C to quit mknull.
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The remainder of this section applies to DVB ASI only.
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Your DVB ASI board uses a set of "stuffing parameters"
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to scale its transmit bitrate relative to its reference frequency.
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Use
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calcstuff <desired_bitrate_in_bps> <packet_size_in_bytes>
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to calculate recommended stuffing parameters.
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This will display several sets of stuffing parameters,
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divided into three groups.
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The "without finetuning" group should be used with
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older boards which do not support bitrate finetuning.
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The "finetuning" group should be used with
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boards which support bitrate finetuning.
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Bitrate finetuning provides more precise bitrate control,
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but typically higher network jitter.
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The "interleaved finetuning" group should be used with
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boards which support interleaved bitrate finetuning.
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Interleaved bitrate finetuning MAY provide
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less network jitter than bitrate finetuning.
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Within each group, there are two or three sets of stuffing parameters.
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Each set will provide the same bitrate and network jitter,
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but different spacing between packets.
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Some equipment may be sensitive to this.
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The "burst mode" set of stuffing parameters transmits each packet in a
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continuous burst, with long gaps between packets.
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An alternative set of stuffing parameters transmits
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the stream with a gap between each byte.
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Interfaces which support large interbyte stuffing values
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can use the "large ib" stuffing parameters
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displayed for extremely low bitrates.
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Suppose we wish to transmit a stream of 188-byte packets
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at 19392658.46 bps (the ATSC rate).
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With interleaved finetuning, calcstuff provides
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the following stuffing parameters:
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ib = 10, ip = 33, normal_ip = 2, big_ip = 169,
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il_normal = 1, il_big = 14
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If you have a transport stream file, transmit it with
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txtest /dev/asitx0 10 33 2 169 1 14 < test.ts
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If you don't have a file, it is possible to transmit a stream
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of MPEG-2 null packets with
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mknull | txtest /dev/asitx0 10 33 2 169 1 14
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If you receive an error message, make sure you have write permission
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on the device file. Press Ctrl+C to quit mknull.
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8. Capturing SMPTE 259M-C with SDI Master
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------------------------------------------
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Connect a SMPTE 259M-C source to your board's receive port
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with a 75 ohm cable.
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If there is a carrier detect LED on the receiver,
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it should light up.
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Assuming that you are using the first receive port
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discovered in the machine, view its configuration with
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sdicfg /dev/sdirx0
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Other interfaces may be viewed by providing the appropriate device file name.
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By default, the interface should be capturing with 10-bit precision
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and packing four 10-bit words into every five bytes.
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If you want to capture with 8-bit precision, change the mode by typing
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sdicfg -m0 /dev/sdirx0
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as root.
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Use
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sdicfg -h
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to view information about other options.
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Capture one second to a file called test.sdi by typing
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capture -n1 /dev/sdirx0 > test.sdi
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If you receive an error message, make sure you have read permission
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on the device file. Capturing longer segments to disk
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without overrunning the driver's buffers will probably require
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a disk array.
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9. Playing SMPTE 259M-C with SDI Master
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----------------------------------------
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Connect a SMPTE 259M-C receiver to your board's transmit port
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with a 75 ohm cable.
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Assuming that you are using the first transmit port
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discovered in the machine, view its configuration with
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sdicfg /dev/sditx0
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Other interfaces may be viewed by providing the appropriate device file name.
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By default, the interface assumes 10-bit data with
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four 10-bit words packed into every five bytes.
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If you want to play 8-bit data, change the mode by typing
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sdicfg -m0 /dev/sditx0
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as root.
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Use
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sdicfg -h
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to view information about other options.
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If you have a file, transmit it with
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playout /dev/sditx0 < test.sdi
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Playing long files from disk without underrunning the driver's buffers
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will probably require a disk array.
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If you don't have a file, it is possible to transmit
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a SMPTE EG 1 color bar pattern with
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eg1 | playout /dev/sditx0
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If you receive an error message, make sure you have write permission
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on the device file. Press Ctrl+C to quit eg1.
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10. Capturing 4:2:2 component digital video over SDI
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----------------------------------------------------
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This section applies to QuadPort and VidPort boards, not SDI Master.
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Connect an SDI source to your board's receive port
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with a 75 ohm cable.
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Assuming that you are using the first receive port
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discovered in the machine, view its configuration with
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sdivideocfg /dev/sdivideorx0
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Other interfaces may be viewed by providing the appropriate device file name.
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By default, the interface should be capturing with 8-bit precision.
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If you want to capture with 10-bit precision, change the mode by typing
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sdivideocfg -m1 /dev/sdivideorx0
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as root.
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Use
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sdivideocfg -h
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to view information about other options.
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Capture one second of video to a file called test.raw by typing
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videocapture -n1 /dev/sdivideorx0 > test.raw
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If you receive an error message, make sure you have read permission
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on the device file. Capturing longer segments to disk
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without overrunning the driver's buffers will probably require
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a disk array.
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You can also use FFmpeg, MPlayer, or VideoLAN to display the captured video.
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Display 720p video with UYVY packing format with FFmpeg by typing
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ffplay -f rawvideo -s 1280x720 -pix_fmt uyvy422 /dev/sdivideorx0
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Display 720p video with UYVY packing format with MPlayer by typing
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mplayer -demuxer rawvideo -rawvideo w=1280:h=720:format=uyvy:fps=60 /dev/sdivideorx0
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Display 720p video with UYVY packing format with VideoLAN by typing
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vlc --demux rawvideo --rawvid-width 1280 --rawvid-height 720 --rawvid-chroma=UYVY --zoom 0.25 --rawvid-fps 60 /dev/sdivideorx0
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11. Capturing audio over SDI
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----------------------------
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This section applies to QuadPort and VidPort boards, not SDI Master.
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Connect an SDI source to your board's receive port
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with a 75 ohm cable.
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Assuming that you are using the first receive port
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discovered in the machine, view its configuration with
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sdiaudiocfg /dev/sdiaudiorx0
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Other interfaces may be viewed by providing the appropriate device file name.
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By default, the interface is set to capture 2-channel audio.
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If you want to capture 8-channel audio, change the mode by typing
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sdiaudiocfg -c8 /dev/sdiaudiorx0
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as root.
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Use
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sdiaudiocfg -h
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to view information about other options.
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Capture one second of audio to a file called test.raw by typing
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audiocapture -n1 /dev/sdiaudiorx0 > test.raw
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If you receive an error message, make sure you have read permission
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on the device file.
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Listen to 2 channel, 16-bit audio with 48000 Hz sample rate with MPlayer
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by typing
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mplayer -demuxer rawaudio -rawaudio channels=2:rate=48000:samplesize=2 /dev/sdiaudiorx0
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Listen to 2 channel, 16-bit audio with 48000 Hz sample rate with VideoLAN
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by typing
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vlc --demux rawaud --rawaud-channels 2 --rawaud-samplerate 48000 --rawaud-fourcc s16l /dev/sdiaudiorx0
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Display video and listen to audio with MPlayer by typing
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mplayer -demuxer rawvideo -rawvideo w=1280:h=720:format=uyvy:fps=60 /dev/sdivideorx0 -audio-demuxer rawaudio -rawaudio channels=2:rate=48000:samplesize=2 -audiofile /dev/sdiaudiorx0
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12. Playing 4:2:2 component digital video over SDI
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--------------------------------------------------
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This section applies to VidPort boards, not SDI Master.
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Connect an SDI receiver to your board's transmit port
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with a 75 ohm cable.
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Assuming that you are using the first transmit port
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discovered in the machine, view its configuration with
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sdivideocfg /dev/sdivideotx0
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Other interfaces may be viewed by providing the appropriate device file name.
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By default, the interface assumes 8-bit data.
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If you want to play 10-bit data, change the mode by typing
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sdivideocfg -m1 /dev/sdivideotx0
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as root.
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Use
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sdivideocfg -h
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to view information about other options.
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If you have a video file, transmit it with
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videoplayout /dev/sdivideotx0 < test.raw
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Playing long files from disk without underrunning the driver's buffers
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will probably require a disk array.
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Transmit a compressed video file with FFmpeg by typing
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ffmpeg -y -i test.ts -f rawvideo -pix_fmt uyvy422 /dev/sdivideotx0
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Transmit a compressed video file with MPlayer by typing
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mencoder -nosound -ovc raw -vf format=uyvy -of rawvideo -o /dev/sdivideotx0 test.ts
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If you don't have a file, it is possible to transmit
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a SMPTE RP219, BT 801, or EG 1 color bar pattern.
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To transmit a RP219 color bar pattern
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rp219 | videoplayout /dev/sdivideotx0
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Use
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rp219 -h
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to view information about other options.
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If you receive an error message, make sure you have write permission
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on the device file. Press Ctrl+C to quit rp219.
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13. Playing audio over SDI
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--------------------------
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This section applies to VidPort boards, not SDI Master.
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Connect an SDI receiver to your board's transmit port
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with a 75 ohm cable.
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Assuming that you are using the first transmit port
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discovered in the machine, view its configuration with
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sdiaudiocfg /dev/sdiaudiotx0
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Other interfaces may be viewed by providing the appropriate device file name.
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By default, the interface assumes 2-channel audio.
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If you want to play 8-channel audio data, change the mode by typing
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sdiaudiocfg -c8 /dev/sdiaudiotx0
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as root.
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Use
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sdiaudiocfg -h
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to view information about other options.
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If you have an audio file, transmit it with
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audioplayout /dev/sdiaudiotx0 < test.raw
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This process will block until video data is also provided;
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this can be used to synchronize audio and video.
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Transmit 2 channel, 16-bit audio with 48 kHz sampling rate
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from a compressed audio file with FFmpeg by typing
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ffmpeg -y -i test.ts -f s16le -ar 48000 -ac 2 /dev/sdiaudiotx0
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Transmit video and audio from a compressed file with FFmpeg by typing
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ffmpeg -y -i test.ts -f rawvideo -pix_fmt uyvy422 /dev/sdivideotx0 -f s16le /dev/sdiaudiotx0
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If you don't have a file, it is possible to transmit
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a SMPTE RP155 tone.
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To transmit a RP155 tone
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rp155 | audioplayout /dev/sdiaudiotx0
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Use
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rp155 -h
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to view information about other options.
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If you receive an error message, make sure you have write permission
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on the device file. Press Ctrl+C to quit rp219.
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14. Driver limitations and known bugs
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Streaming data to or from disk requires a fast CPU and a fast disk.
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The hdparm utility may be useful for benchmarking and optimizing disk access.
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Rev. 2 DVB Master Receive boards frequently refuse to allow
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the status register to be read at the start of the
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interrupt service routine, effectively hanging the machine.
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Contact your distributor to obtain a replacement board.
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