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path: root/drivers/media/pci/ivtv/ivtv-alsa.h
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Diffstat (limited to 'drivers/media/pci/ivtv/ivtv-alsa.h')
-rw-r--r--drivers/media/pci/ivtv/ivtv-alsa.h75
1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/media/pci/ivtv/ivtv-alsa.h b/drivers/media/pci/ivtv/ivtv-alsa.h
new file mode 100644
index 000000000000..4a0d8f2c254d
--- /dev/null
+++ b/drivers/media/pci/ivtv/ivtv-alsa.h
@@ -0,0 +1,75 @@
+/*
+ * ALSA interface to ivtv PCM capture streams
+ *
+ * Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net>
+ * Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307 USA
+ */
+
+struct snd_card;
+
+struct snd_ivtv_card {
+ struct v4l2_device *v4l2_dev;
+ struct snd_card *sc;
+ unsigned int capture_transfer_done;
+ unsigned int hwptr_done_capture;
+ struct snd_pcm_substream *capture_pcm_substream;
+ spinlock_t slock;
+};
+
+extern int ivtv_alsa_debug;
+
+/*
+ * File operations that manipulate the encoder or video or audio subdevices
+ * need to be serialized. Use the same lock we use for v4l2 file ops.
+ */
+static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc)
+{
+ struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
+ mutex_lock(&itv->serialize_lock);
+}
+
+static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc)
+{
+ struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);
+ mutex_unlock(&itv->serialize_lock);
+}
+
+#define IVTV_ALSA_DBGFLG_WARN (1 << 0)
+#define IVTV_ALSA_DBGFLG_INFO (1 << 1)
+
+#define IVTV_ALSA_DEBUG(x, type, fmt, args...) \
+ do { \
+ if ((x) & ivtv_alsa_debug) \
+ pr_info("%s-alsa: " type ": " fmt, \
+ v4l2_dev->name , ## args); \
+ } while (0)
+
+#define IVTV_ALSA_DEBUG_WARN(fmt, args...) \
+ IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args)
+
+#define IVTV_ALSA_DEBUG_INFO(fmt, args...) \
+ IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args)
+
+#define IVTV_ALSA_ERR(fmt, args...) \
+ pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args)
+
+#define IVTV_ALSA_WARN(fmt, args...) \
+ pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args)
+
+#define IVTV_ALSA_INFO(fmt, args...) \
+ pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args)