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Diffstat (limited to 'sound/oss/emu10k1/passthrough.h')
| -rw-r--r-- | sound/oss/emu10k1/passthrough.h | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/sound/oss/emu10k1/passthrough.h b/sound/oss/emu10k1/passthrough.h deleted file mode 100644 index 420cc978425..00000000000 --- a/sound/oss/emu10k1/passthrough.h +++ /dev/null @@ -1,99 +0,0 @@ -/* - ********************************************************************** - * 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; -}; - -/* - Passthrough can be done in two methods: - - Method 1 : tram - In original emu10k1, we couldn't bypass the sample rate converters. Even at 48kHz - (the internal sample rate of the emu10k1) the samples would get messed up. - To over come this, samples are copied into the tram and a special dsp patch copies - the samples out and generates interrupts when a block has finnished playing. - - Method 2 : Interpolator bypass - - Creative fixed the sample rate convert problem in emu10k1 rev 7 and higher - (including the emu10k2 (audigy)). This allows us to use the regular, and much simpler - playback method. - - - In both methods, dsp code is used to mux audio and passthrough. This ensures that the spdif - doesn't receive audio and pasthrough data at the same time. The spdif flag SPCS_NOTAUDIODATA - is set to tell - - */ - -// emu10k1 revs greater than or equal to 7 can use method2 - -#define USE_PT_METHOD2 (card->is_audigy) -#define USE_PT_METHOD1 !USE_PT_METHOD2 - -ssize_t emu10k1_pt_write(struct file *file, const char __user *buf, size_t count); - -int emu10k1_pt_setup(struct emu10k1_wavedevice *wave_dev); -void emu10k1_pt_stop(struct emu10k1_card *card); -void emu10k1_pt_waveout_update(struct emu10k1_wavedevice *wave_dev); - -#endif /* _PASSTHROUGH_H */ |