patch-2.4.8 linux/drivers/sound/emu10k1/passthrough.h

• Lines: 71
• Date: Fri Aug 10 21:02:19 2001
• Orig file: v2.4.7/linux/drivers/sound/emu10k1/passthrough.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.7/linux/drivers/sound/emu10k1/passthrough.h linux/drivers/sound/emu10k1/passthrough.h
@@ -0,0 +1,70 @@
+/*
+ **********************************************************************
+ *     passthrough.h -- Emu10k1 digital passthrough header file
+ *     Copyright (C) 2001  Juha Yrjölä <jyrjola@cc.hut.fi>
+ *
+ **********************************************************************
+ *
+ *     Date                 Author          Summary of changes
+ *     ----                 ------          ------------------
+ *     May 15, 2001	    Juha Yrjölä     base code release
+ *
+ **********************************************************************
+ *
+ *     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., 675 Mass Ave, Cambridge, MA 02139,
+ *     USA.
+ *
+ **********************************************************************
+ */
+
+#ifndef _PASSTHROUGH_H
+#define _PASSTHROUGH_H
+
+#include "audio.h"
+
+/* number of 16-bit stereo samples in XTRAM buffer */
+#define PT_SAMPLES 0x8000
+#define PT_BLOCKSAMPLES 0x400
+#define PT_BLOCKSIZE (PT_BLOCKSAMPLES*4)
+#define PT_BLOCKSIZE_LOG2 12
+#define PT_BLOCKCOUNT (PT_SAMPLES/PT_BLOCKSAMPLES)
+#define PT_INITPTR (PT_SAMPLES/2-1)
+
+#define PT_STATE_INACTIVE 0
+#define PT_STATE_ACTIVATED 1
+#define PT_STATE_PLAYING 2
+
+/* passthrough struct */
+struct pt_data
+{
+	u8	selected, state, spcs_to_use;
+	int	intr_gpr, enable_gpr, pos_gpr;
+	u32	blocks_played, blocks_copied, old_spcs[3];
+	u32	playptr, copyptr;
+	u32	prepend_size;
+	u8	*buf;
+	u8	ac3data;
+
+	char	*patch_name, *intr_gpr_name, *enable_gpr_name, *pos_gpr_name;
+
+	wait_queue_head_t wait;
+	spinlock_t lock;
+};
+
+ssize_t emu10k1_pt_write(struct file *file, const char *buf, size_t count);
+void emu10k1_pt_stop(struct emu10k1_card *card);
+void emu10k1_pt_waveout_update(struct emu10k1_wavedevice *wave_dev);
+
+#endif /* _PASSTHROUGH_H */