90da2b2859
For a slightly thorough explaination, please refer to [1] http://people.freebsd.org/~ariff/SOUND_4.TXT.html . Summary of changes includes: 1 Volume Per-Channel (vpc). Provides private / standalone volume control unique per-stream pcm channel without touching master volume / pcm. Applications can directly use SNDCTL_DSP_[GET|SET][PLAY|REC]VOL, or for backwards compatibility, SOUND_MIXER_PCM through the opened dsp device instead of /dev/mixer. Special "bypass" mode is enabled through /dev/mixer which will automatically detect if the adjustment is made through /dev/mixer and forward its request to this private volume controller. Changes to this volume object will not interfere with other channels. Requirements: - SNDCTL_DSP_[GET|SET][PLAY|REC]_VOL are newer ioctls (OSSv4) which require specific application modifications (preferred). - No modifications required for using bypass mode, so applications like mplayer or xmms should work out of the box. Kernel hints: - hint.pcm.%d.vpc (0 = disable vpc). Kernel sysctls: - hw.snd.vpc_mixer_bypass (default: 1). Enable or disable /dev/mixer bypass mode. - hw.snd.vpc_autoreset (default: 1). By default, closing/opening /dev/dsp will reset the volume back to 0 db gain/attenuation. Setting this to 0 will preserve its settings across device closing/opening. - hw.snd.vpc_reset (default: 0). Panic/reset button to reset all volume settings back to 0 db. - hw.snd.vpc_0db (default: 45). 0 db relative to linear mixer value. 2 High quality fixed-point Bandlimited SINC sampling rate converter, based on Julius O'Smith's Digital Audio Resampling - http://ccrma.stanford.edu/~jos/resample/. It includes a filter design script written in awk (the clumsiest joke I've ever written) - 100% 32bit fixed-point, 64bit accumulator. - Possibly among the fastest (if not fastest) of its kind. - Resampling quality is tunable, either runtime or during kernel compilation (FEEDER_RATE_PRESETS). - Quality can be further customized during kernel compilation by defining FEEDER_RATE_PRESETS in /etc/make.conf. Kernel sysctls: - hw.snd.feeder_rate_quality. 0 - Zero-order Hold (ZOH). Fastest, bad quality. 1 - Linear Interpolation (LINEAR). Slightly slower than ZOH, better quality but still does not eliminate aliasing. 2 - (and above) - Sinc Interpolation(SINC). Best quality. SINC quality always start from 2 and above. Rough quality comparisons: - http://people.freebsd.org/~ariff/z_comparison/ 3 Bit-perfect mode. Bypasses all feeder/dsp effects. Pure sound will be directly fed into the hardware. 4 Parametric (compile time) Software Equalizer (Bass/Treble mixer). Can be customized by defining FEEDER_EQ_PRESETS in /etc/make.conf. 5 Transparent/Adaptive Virtual Channel. Now you don't have to disable vchans in order to make digital format pass through. It also makes vchans more dynamic by choosing a better format/rate among all the concurrent streams, which means that dev.pcm.X.play.vchanformat/rate becomes sort of optional. 6 Exclusive Stream, with special open() mode O_EXCL. This will "mute" other concurrent vchan streams and only allow a single channel with O_EXCL set to keep producing sound. Other Changes: * most feeder_* stuffs are compilable in userland. Let's not speculate whether we should go all out for it (save that for FreeBSD 16.0-RELEASE). * kobj signature fixups, thanks to Andriy Gapon <avg@freebsd.org> * pull out channel mixing logic out of vchan.c and create its own feeder_mixer for world justice. * various refactoring here and there, for good or bad. * activation of few more OSSv4 ioctls() (see [1] above). * opt_snd.h for possible compile time configuration: (mostly for debugging purposes, don't try these at home) SND_DEBUG SND_DIAGNOSTIC SND_FEEDER_MULTIFORMAT SND_FEEDER_FULL_MULTIFORMAT SND_FEEDER_RATE_HP SND_PCM_64 SND_OLDSTEREO Manual page updates are on the way. Tested by: joel, Olivier SMEDTS <olivier at gid0 d org>, too many unsung / unnamed heroes.
219 lines
7.2 KiB
C
219 lines
7.2 KiB
C
/*-
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* Copyright (c) 2007-2009 Ariff Abdullah <ariff@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SND_MATRIX_H_
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#define _SND_MATRIX_H_
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#undef SND_MULTICHANNEL
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#ifndef SND_OLDSTEREO
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#define SND_MULTICHANNEL 1
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#endif
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/*
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* XXX = unused, but part of the definition (will be used someday, maybe).
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*/
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#define SND_CHN_T_FL 0 /* Front Left */
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#define SND_CHN_T_FR 1 /* Front Right */
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#define SND_CHN_T_FC 2 /* Front Center */
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#define SND_CHN_T_LF 3 /* Low Frequency */
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#define SND_CHN_T_BL 4 /* Back Left */
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#define SND_CHN_T_BR 5 /* Back Right */
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#define SND_CHN_T_FLC 6 /* Front Left Center XXX */
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#define SND_CHN_T_FRC 7 /* Front Right Center XXX */
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#define SND_CHN_T_BC 8 /* Back Center */
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#define SND_CHN_T_SL 9 /* Side Left */
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#define SND_CHN_T_SR 10 /* Side Right */
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#define SND_CHN_T_TC 11 /* Top Center XXX */
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#define SND_CHN_T_TFL 12 /* Top Front Left XXX */
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#define SND_CHN_T_TFC 13 /* Top Front Center XXX */
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#define SND_CHN_T_TFR 14 /* Top Front Right XXX */
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#define SND_CHN_T_TBL 15 /* Top Back Left XXX */
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#define SND_CHN_T_TBC 16 /* Top Back Center XXX */
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#define SND_CHN_T_TBR 17 /* Top Back Right XXX */
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#define SND_CHN_T_MAX 18 /* Maximum channels */
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#define SND_CHN_T_ZERO (SND_CHN_T_MAX + 1) /* Zero samples */
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#define SND_CHN_T_LABELS { \
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"fl", "fr", "fc", "lf", "bl", "br", \
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"flc", "frc", "bc", "sl", "sr", "tc", \
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"tfl", "tfc", "tfr", "tbl", "tbc", "tbr" \
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}
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#define SND_CHN_T_NAMES { \
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"Front Left", "Front Right", "Front Center", \
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"Low Frequency Effects", \
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"Back Left", "Back Right", \
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"Front Left Center", "Front Right Center", \
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"Back Center", \
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"Side Left", "Side Right", \
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"Top Center", \
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"Top Front Left", "Top Front Center", "Top Front Right", \
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"Top Back Left", "Top Back Center", "Top Back Right" \
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}
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#define SND_CHN_T_MASK_FL (1 << SND_CHN_T_FL)
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#define SND_CHN_T_MASK_FR (1 << SND_CHN_T_FR)
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#define SND_CHN_T_MASK_FC (1 << SND_CHN_T_FC)
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#define SND_CHN_T_MASK_LF (1 << SND_CHN_T_LF)
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#define SND_CHN_T_MASK_BL (1 << SND_CHN_T_BL)
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#define SND_CHN_T_MASK_BR (1 << SND_CHN_T_BR)
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#define SND_CHN_T_MASK_FLC (1 << SND_CHN_T_FLC)
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#define SND_CHN_T_MASK_FRC (1 << SND_CHN_T_FRC)
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#define SND_CHN_T_MASK_BC (1 << SND_CHN_T_BC)
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#define SND_CHN_T_MASK_SL (1 << SND_CHN_T_SL)
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#define SND_CHN_T_MASK_SR (1 << SND_CHN_T_SR)
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#define SND_CHN_T_MASK_TC (1 << SND_CHN_T_TC)
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#define SND_CHN_T_MASK_TFL (1 << SND_CHN_T_TFL)
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#define SND_CHN_T_MASK_TFC (1 << SND_CHN_T_TFC)
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#define SND_CHN_T_MASK_TFR (1 << SND_CHN_T_TFR)
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#define SND_CHN_T_MASK_TBL (1 << SND_CHN_T_TBL)
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#define SND_CHN_T_MASK_TBC (1 << SND_CHN_T_TBC)
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#define SND_CHN_T_MASK_TBR (1 << SND_CHN_T_TBR)
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#define SND_CHN_LEFT_MASK (SND_CHN_T_MASK_FL | \
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SND_CHN_T_MASK_BL | \
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SND_CHN_T_MASK_FLC | \
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SND_CHN_T_MASK_SL | \
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SND_CHN_T_MASK_TFL | \
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SND_CHN_T_MASK_TBL)
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#define SND_CHN_RIGHT_MASK (SND_CHN_T_MASK_FR | \
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SND_CHN_T_MASK_BR | \
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SND_CHN_T_MASK_FRC | \
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SND_CHN_T_MASK_SR | \
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SND_CHN_T_MASK_TFR | \
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SND_CHN_T_MASK_TBR)
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#define SND_CHN_CENTER_MASK (SND_CHN_T_MASK_FC | \
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SND_CHN_T_MASK_BC | \
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SND_CHN_T_MASK_TC | \
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SND_CHN_T_MASK_TFC | \
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SND_CHN_T_MASK_TBC | \
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SND_CHN_T_MASK_LF) /* XXX what?!? */
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/*
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* Matrix identity.
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*/
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/* 1 @ Mono 1.0 */
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#define SND_CHN_MATRIX_1_0 0
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#define SND_CHN_MATRIX_1 SND_CHN_MATRIX_1_0
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/* 2 @ Stereo 2.0 */
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#define SND_CHN_MATRIX_2_0 1
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#define SND_CHN_MATRIX_2 SND_CHN_MATRIX_2_0
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/* 3 @ 2.1 (lfe), 3.0 (rear center, DEFAULT) */
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#define SND_CHN_MATRIX_2_1 2
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#define SND_CHN_MATRIX_3_0 3
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#define SND_CHN_MATRIX_3 SND_CHN_MATRIX_3_0
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/* 4 @ 4.0 Quadraphonic */
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#define SND_CHN_MATRIX_4_0 4
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#define SND_CHN_MATRIX_4 SND_CHN_MATRIX_4_0
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/* 5 @ 4.1 (lfe), 5.0 (center, DEFAULT) */
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#define SND_CHN_MATRIX_4_1 5
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#define SND_CHN_MATRIX_5_0 6
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#define SND_CHN_MATRIX_5 SND_CHN_MATRIX_5_0
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/* 6 @ 5.1 (lfe, DEFAULT), 6.0 (rear center) */
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#define SND_CHN_MATRIX_5_1 7
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#define SND_CHN_MATRIX_6_0 8
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#define SND_CHN_MATRIX_6 SND_CHN_MATRIX_5_1
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/* 7 @ 6.1 (lfe) */
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#define SND_CHN_MATRIX_6_1 9
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#define SND_CHN_MATRIX_7 SND_CHN_MATRIX_6_1
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/* 8 @ 7.1 (lfe) */
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#define SND_CHN_MATRIX_7_1 10
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#define SND_CHN_MATRIX_8 SND_CHN_MATRIX_7_1
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#define SND_CHN_MATRIX_MAX 11
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#define SND_CHN_MATRIX_BEGIN SND_CHN_MATRIX_1_0
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#define SND_CHN_MATRIX_END SND_CHN_MATRIX_7_1
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/* Custom matrix identity */
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#define SND_CHN_MATRIX_DRV -4 /* driver own identity */
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#define SND_CHN_MATRIX_PCMCHANNEL -3 /* PCM channel identity */
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#define SND_CHN_MATRIX_MISC -2 /* misc, custom defined */
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#define SND_CHN_MATRIX_UNKNOWN -1 /* unknown */
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#define SND_CHN_T_VOL_0DB SND_CHN_T_MAX
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#define SND_CHN_T_VOL_MAX (SND_CHN_T_VOL_0DB + 1)
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#define SND_CHN_T_BEGIN SND_CHN_T_FL
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#define SND_CHN_T_END SND_CHN_T_TBR
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#define SND_CHN_T_STEP 1
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#define SND_CHN_MIN 1
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#ifdef SND_MULTICHANNEL
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#define SND_CHN_MAX 8
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#else
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#define SND_CHN_MAX 2
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#endif
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/*
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* Multichannel interleaved volume matrix. Each calculated value relative
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* to master and 0db will be stored in each CLASS + 1 as long as
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* chn_setvolume_matrix() or the equivalent CHN_SETVOLUME() macros is
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* used (see channel.c).
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*/
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#define SND_VOL_C_MASTER 0
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#define SND_VOL_C_PCM 1
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#define SND_VOL_C_PCM_VAL 2
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#define SND_VOL_C_MAX 3
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#define SND_VOL_C_BEGIN SND_VOL_C_PCM
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#define SND_VOL_C_END SND_VOL_C_PCM
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#define SND_VOL_C_STEP 2
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#define SND_VOL_C_VAL(x) ((x) + 1)
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#define SND_VOL_0DB_MIN 1
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#define SND_VOL_0DB_MAX 100
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#define SND_VOL_0DB_MASTER 100
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#define SND_VOL_0DB_PCM 45
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#define SND_VOL_RESOLUTION 8
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#define SND_VOL_FLAT (1 << SND_VOL_RESOLUTION)
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#define SND_VOL_CALC_SAMPLE(x, y) (((x) * (y)) >> SND_VOL_RESOLUTION)
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#define SND_VOL_CALC_VAL(x, y, z) \
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(((((x)[y][z] << SND_VOL_RESOLUTION) / \
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(x)[y][SND_CHN_T_VOL_0DB]) * \
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(x)[SND_VOL_C_MASTER][z]) / \
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(x)[SND_VOL_C_MASTER][SND_CHN_T_VOL_0DB]) \
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#endif /* !_SND_MATRIX_H_ */
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