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author | Mike Isely <isely@pobox.com> | 2007-11-26 02:07:26 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-01-25 19:03:05 -0200 |
commit | f5174af201f2e22c101bb02d06343e4bc5f056de (patch) | |
tree | a13e51ad387953b17f11360a5cb89d8abc0ea551 /drivers/media/video/pvrusb2/pvrusb2-audio.c | |
parent | aaf7884db395332ae8474f3ea5bcdd39c0a941ea (diff) | |
download | kernel_samsung_smdk4412-f5174af201f2e22c101bb02d06343e4bc5f056de.zip kernel_samsung_smdk4412-f5174af201f2e22c101bb02d06343e4bc5f056de.tar.gz kernel_samsung_smdk4412-f5174af201f2e22c101bb02d06343e4bc5f056de.tar.bz2 |
V4L/DVB (6698): pvrusb2: Implement signal routing schemes
The exact routing of video and audio signals within a device is a
device-specific attribute. Hauppauge devices do it one way; other
types of device may route things differently. Unfortunately it is
rather impractical to define chip-specific routing at the device
attribute level, so instead what happens here is that "schemes" are
defined. Each chip level interface implements its part of a given
scheme and the scheme as a whole is made into a device specific
attribute controlled via a table entry in pvrusb2-devattr.c. The only
scheme defined here is for Hauppauge devices, but clearly this opens
the door for other possibilities to follow.
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-audio.c')
-rw-r--r-- | drivers/media/video/pvrusb2/pvrusb2-audio.c | 62 |
1 files changed, 43 insertions, 19 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-audio.c b/drivers/media/video/pvrusb2/pvrusb2-audio.c index 379645e..9a7c8e9 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-audio.c +++ b/drivers/media/video/pvrusb2/pvrusb2-audio.c @@ -35,34 +35,58 @@ struct pvr2_msp3400_handler { }; + +struct routing_scheme { + const int *def; + unsigned int cnt; +}; + +static const int routing_scheme0[] = { + [PVR2_CVAL_INPUT_TV] = MSP_INPUT_DEFAULT, + [PVR2_CVAL_INPUT_RADIO] = MSP_INPUT(MSP_IN_SCART2, + MSP_IN_TUNER1, + MSP_DSP_IN_SCART, + MSP_DSP_IN_SCART), + [PVR2_CVAL_INPUT_COMPOSITE] = MSP_INPUT(MSP_IN_SCART1, + MSP_IN_TUNER1, + MSP_DSP_IN_SCART, + MSP_DSP_IN_SCART), + [PVR2_CVAL_INPUT_SVIDEO] = MSP_INPUT(MSP_IN_SCART1, + MSP_IN_TUNER1, + MSP_DSP_IN_SCART, + MSP_DSP_IN_SCART), +}; + +static const struct routing_scheme routing_schemes[] = { + [PVR2_ROUTING_SCHEME_HAUPPAUGE] = { + .def = routing_scheme0, + .cnt = ARRAY_SIZE(routing_scheme0), + }, +}; + /* This function selects the correct audio input source */ static void set_stereo(struct pvr2_msp3400_handler *ctxt) { struct pvr2_hdw *hdw = ctxt->hdw; struct v4l2_routing route; + const struct routing_scheme *sp; + unsigned int sid = hdw->hdw_desc->signal_routing_scheme; pvr2_trace(PVR2_TRACE_CHIPS,"i2c msp3400 v4l2 set_stereo"); - route.input = MSP_INPUT_DEFAULT; - route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1); - switch (hdw->input_val) { - case PVR2_CVAL_INPUT_TV: - break; - case PVR2_CVAL_INPUT_RADIO: - /* Assume that msp34xx also handle FM decoding, in which case - we're still using the tuner. */ - /* HV: actually it is more likely to be the SCART2 input if - the ivtv experience is any indication. */ - route.input = MSP_INPUT(MSP_IN_SCART2, MSP_IN_TUNER1, - MSP_DSP_IN_SCART, MSP_DSP_IN_SCART); - break; - case PVR2_CVAL_INPUT_SVIDEO: - case PVR2_CVAL_INPUT_COMPOSITE: - /* SCART 1 input */ - route.input = MSP_INPUT(MSP_IN_SCART1, MSP_IN_TUNER1, - MSP_DSP_IN_SCART, MSP_DSP_IN_SCART); - break; + if ((sid < ARRAY_SIZE(routing_schemes)) && + ((sp = routing_schemes + sid) != 0) && + (hdw->input_val >= 0) && + (hdw->input_val < sp->cnt)) { + route.input = sp->def[hdw->input_val]; + } else { + pvr2_trace(PVR2_TRACE_ERROR_LEGS, + "*** WARNING *** i2c msp3400 v4l2 set_stereo:" + " Invalid routing scheme (%u) and/or input (%d)", + sid,hdw->input_val); + return; } + route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1); pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route); } |