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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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269c11fbac
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>
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/*
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* ALSA interface to ivtv PCM capture streams
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*
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* Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net>
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* Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA
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*/
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struct snd_card;
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struct snd_ivtv_card {
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struct v4l2_device *v4l2_dev;
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struct snd_card *sc;
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unsigned int capture_transfer_done;
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unsigned int hwptr_done_capture;
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struct snd_pcm_substream *capture_pcm_substream;
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spinlock_t slock;
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};
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extern int ivtv_alsa_debug;
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/*
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* File operations that manipulate the encoder or video or audio subdevices
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* need to be serialized. Use the same lock we use for v4l2 file ops.
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*/
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static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc)
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{
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struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
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mutex_lock(&itv->serialize_lock);
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}
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static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc)
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{
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struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
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mutex_unlock(&itv->serialize_lock);
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}
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#define IVTV_ALSA_DBGFLG_WARN (1 << 0)
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#define IVTV_ALSA_DBGFLG_INFO (1 << 1)
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#define IVTV_ALSA_DEBUG(x, type, fmt, args...) \
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do { \
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if ((x) & ivtv_alsa_debug) \
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pr_info("%s-alsa: " type ": " fmt, \
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v4l2_dev->name , ## args); \
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} while (0)
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#define IVTV_ALSA_DEBUG_WARN(fmt, args...) \
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IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
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#define IVTV_ALSA_DEBUG_INFO(fmt, args...) \
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IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args)
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#define IVTV_ALSA_ERR(fmt, args...) \
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pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args)
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#define IVTV_ALSA_WARN(fmt, args...) \
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pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args)
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#define IVTV_ALSA_INFO(fmt, args...) \
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pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args)
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