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[media] ivtv, ivtv-alsa: Add initial ivtv-alsa interface driver for ivtv

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This is a cut-and-paste port of the cx18-alsa driver to
create an ivtv-alsa interface module for the ivtv driver.
It is not actually hooked-up to the PCM stream DMA buffers
from the ivtv driver yet.  That will be done in a coming change,
since that portion is so very different from the cx18 driver.
This code has all or more of the bugs and shortcomings of the
cx18-alsa interface driver: inconsistent use of itvsc->slock,
ivtv-alsa-mixer.c is dead code, assumes 48 ksps regardless
of the actual setting of the audio capture, problems with
proper struct ivtv and struct ivtv_stream housekeeping,
struct ivtv_open_id.v4l2_fh abuse, and $DIETY knows what else.

Signed-off-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Andy Walls
2012-09-02 19:13:14 -03:00
committed by Mauro Carvalho Chehab
parent 6d60805fd2
commit 269c11fbac
13 changed files with 1027 additions and 3 deletions
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4
drivers/media/pci/ivtv/ivtv-fileops.c
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@@ -41,7 +41,7 @@
associated VBI streams are also automatically claimed.
Possible error returns: -EBUSY if someone else has claimed
the stream or 0 on success. */
static int ivtv_claim_stream(struct ivtv_open_id *id, int type)
int ivtv_claim_stream(struct ivtv_open_id *id, int type)
{
struct ivtv *itv = id->itv;
struct ivtv_stream *s = &itv->streams[type];
@@ -96,6 +96,7 @@ static int ivtv_claim_stream(struct ivtv_open_id *id, int type)
set_bit(IVTV_F_S_INTERNAL_USE, &s_vbi->s_flags);
return 0;
}
EXPORT_SYMBOL(ivtv_claim_stream);
/* This function releases a previously claimed stream. It will take into
account associated VBI streams. */
@@ -146,6 +147,7 @@ void ivtv_release_stream(struct ivtv_stream *s)
clear_bit(IVTV_F_S_CLAIMED, &s_vbi->s_flags);
ivtv_flush_queues(s_vbi);
}
EXPORT_SYMBOL(ivtv_release_stream);
static void ivtv_dualwatch(struct ivtv *itv)
{