On Thu, 2009-03-26 at 13:08 +0100, Martin Dauskardt wrote: > It seems my personal mail to Andy Walls didn reach him, so I repost it here:
In this case you are correct, it did not reach me. But please note, as a general rule, I don't respond to personal emails related to cx18. I rely on the power of newsgroups and mailing lists to help shoulder the load. :) > I would like to add support for cx18 devices in the pvrinput-plugin for vdr > and have a few questions: Just to let you know, the cx18 driver works fine with an HVR-1600 and MythTV, if one tells MythTV that the card is an PVR-x50, PVR-500 MPEG encoder card (for analog TV) and a DVB card for ATSC. > Do all cx18-based cards have a Tuner that supports PAL ? No. There are really only 3 well supported cards: HVR-1600 - NTSC-M analog tuner, MCE versions have an FM radio input Compro H900 - XCeive 2028 silicon tuner for analog and FM radio AFAICT Conexant Raptor PAL/SECAM - a PAL/SECAM tuner for analog, also FM Radio All the other boards are poorly supported due to little information available about the hardware on the boards or lack of testing feedback. The Conexant Raptor board is an eval board which very few users will have. > I read that sliced VBI is now working. How can I detect if the installed cx18 > driver supports it? Should I quiry the capabilitys for > V4L2_CAP_SLICED_VBI_CAPTURE , or is it better to determine support by looking > for the driver version number? Use the V4L2_CAP_SLICED_VBI_CAPTURE flag. The driver version only really increments for fundamental internal changes. Maybe I should change that policy. > How do I switch from TV or external inputs to radio? The ivtv driver needs to > switch to the "Tuner" input (which seems to be namend "Tuner 1" for cx18) and > then open the radio device. The pvrusb2 driver has its own input name for > radio. I'd have to investigate the details. Given that most of the code is derived from ivtv, it should behave very similarly to ivtv. I do know that this following sequence works for an HVR-1600 (I just tested it): $ v4l2-ctl -i 0 Video input set to 0 (Tuner 1) $ v4l2-ctl -i 2 Video input set to 2 (Composite 1) $ ivtv-radio -v -f 88.1 set to freq 88.10 signal strength: 8192 Running: aplay -f dat < /dev/video24 Playing raw data 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo ^CAborted by signal Interrupt... Cleaning up So I don't think you need to set to the Tuner 1 input first. > Is there anything special which is different from the ivtv driver? Any > unsupported ioctl? (The pvrusb2 driver does not support > V4L2_ENC_CMD_STOP/START for example) Obviously MPEG *decoder* ioctls() aren't supported by the cx18 driver, as the CX23418 only performs MPEG encoding. Simultaneous digital TV capture and analog capture is supported. The HVR-1600 has tuners to support both at once. Cards that have a single silicon tuner for digital TV and analog obviously could never support both at once. Some things on my TODO list: MPEG Index file generation isn't implemented yet. Nor the "dualwatch" for secondary audio programs. Volume control of I2S audio (line in audio and FM Radio on the HVR-1600 and Conexant Raptor) doesn't work. You can still mute it however. (Mute is done by the encoder vs. the baseband audio processing in the digitizer.) Due to the conversion to the new v4l2 framework and some latent bugs inhereted from ivtv, the switch to or from FM radio that relies on GPIO lines (like on the Conexant Raptor card) may not work right, > Do all cx18-based cards have ATSC support? No. Only one unit that I know of: HVR1600: has a digital tuner and demodulator for ATSC and North American cable (ITU-T J.83 Annex B) QAM > Or are there any devices that > support DVB-C, DVB-T or DVB-S instead? Toshiba Qosmio internal: DVB-T but not enough info about the laptop card to make the driver work. Leadtek WinFast PVR2100: DVB-T but not enough info about the card to make the driver work. Leadtek WinFast DVR3100 H: DVB-T but not enough info about the card to make the driver work. Yuan MPC718: Either DVB-T or DVB-C (I'm not sure which), but not enough info about the card to make the driver work. > Is there any analogue-only device with > a cx23418 chip? Compro H900: no digital tuner(?) nor demod Conexant Raptor: no digital tuner nor demod > Greets from Germany, > Martin Regards, Andy _______________________________________________ ivtv-devel mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-devel
