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freebsd-nq/sys/dev/sound/pcm/g711.h

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Sound Mega-commit. Expect further cleanup until code freeze. 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.
2009-06-07 19:12:08 +00:00
/*-
* Copyright (c) 2008-2009 Ariff Abdullah <ariff@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _SND_G711_H_
#define _SND_G711_H_
#define G711_TABLE_SIZE 256
#define ULAW_TO_U8 { \
3, 7, 11, 15, 19, 23, 27, 31, \
35, 39, 43, 47, 51, 55, 59, 63, \
66, 68, 70, 72, 74, 76, 78, 80, \
82, 84, 86, 88, 90, 92, 94, 96, \
98, 99, 100, 101, 102, 103, 104, 105, \
106, 107, 108, 109, 110, 111, 112, 113, \
113, 114, 114, 115, 115, 116, 116, 117, \
117, 118, 118, 119, 119, 120, 120, 121, \
121, 121, 122, 122, 122, 122, 123, 123, \
123, 123, 124, 124, 124, 124, 125, 125, \
125, 125, 125, 125, 126, 126, 126, 126, \
126, 126, 126, 126, 127, 127, 127, 127, \
127, 127, 127, 127, 127, 127, 127, 127, \
128, 128, 128, 128, 128, 128, 128, 128, \
128, 128, 128, 128, 128, 128, 128, 128, \
128, 128, 128, 128, 128, 128, 128, 128, \
253, 249, 245, 241, 237, 233, 229, 225, \
221, 217, 213, 209, 205, 201, 197, 193, \
190, 188, 186, 184, 182, 180, 178, 176, \
174, 172, 170, 168, 166, 164, 162, 160, \
158, 157, 156, 155, 154, 153, 152, 151, \
150, 149, 148, 147, 146, 145, 144, 143, \
143, 142, 142, 141, 141, 140, 140, 139, \
139, 138, 138, 137, 137, 136, 136, 135, \
135, 135, 134, 134, 134, 134, 133, 133, \
133, 133, 132, 132, 132, 132, 131, 131, \
131, 131, 131, 131, 130, 130, 130, 130, \
130, 130, 130, 130, 129, 129, 129, 129, \
129, 129, 129, 129, 129, 129, 129, 129, \
128, 128, 128, 128, 128, 128, 128, 128, \
128, 128, 128, 128, 128, 128, 128, 128, \
128, 128, 128, 128, 128, 128, 128, 128, \
}
#define ALAW_TO_U8 { \
108, 109, 106, 107, 112, 113, 110, 111, \
100, 101, 98, 99, 104, 105, 102, 103, \
118, 118, 117, 117, 120, 120, 119, 119, \
114, 114, 113, 113, 116, 116, 115, 115, \
43, 47, 35, 39, 59, 63, 51, 55, \
11, 15, 3, 7, 27, 31, 19, 23, \
86, 88, 82, 84, 94, 96, 90, 92, \
70, 72, 66, 68, 78, 80, 74, 76, \
127, 127, 127, 127, 127, 127, 127, 127, \
127, 127, 127, 127, 127, 127, 127, 127, \
128, 128, 128, 128, 128, 128, 128, 128, \
128, 128, 128, 128, 128, 128, 128, 128, \
123, 123, 123, 123, 124, 124, 124, 124, \
121, 121, 121, 121, 122, 122, 122, 122, \
126, 126, 126, 126, 126, 126, 126, 126, \
125, 125, 125, 125, 125, 125, 125, 125, \
148, 147, 150, 149, 144, 143, 146, 145, \
156, 155, 158, 157, 152, 151, 154, 153, \
138, 138, 139, 139, 136, 136, 137, 137, \
142, 142, 143, 143, 140, 140, 141, 141, \
213, 209, 221, 217, 197, 193, 205, 201, \
245, 241, 253, 249, 229, 225, 237, 233, \
170, 168, 174, 172, 162, 160, 166, 164, \
186, 184, 190, 188, 178, 176, 182, 180, \
129, 129, 129, 129, 129, 129, 129, 129, \
129, 129, 129, 129, 129, 129, 129, 129, \
128, 128, 128, 128, 128, 128, 128, 128, \
128, 128, 128, 128, 128, 128, 128, 128, \
133, 133, 133, 133, 132, 132, 132, 132, \
135, 135, 135, 135, 134, 134, 134, 134, \
130, 130, 130, 130, 130, 130, 130, 130, \
131, 131, 131, 131, 131, 131, 131, 131, \
}
#define U8_TO_ULAW { \
0, 0, 0, 0, 0, 1, 1, 1, \
1, 2, 2, 2, 2, 3, 3, 3, \
3, 4, 4, 4, 4, 5, 5, 5, \
5, 6, 6, 6, 6, 7, 7, 7, \
7, 8, 8, 8, 8, 9, 9, 9, \
9, 10, 10, 10, 10, 11, 11, 11, \
11, 12, 12, 12, 12, 13, 13, 13, \
13, 14, 14, 14, 14, 15, 15, 15, \
15, 16, 16, 17, 17, 18, 18, 19, \
19, 20, 20, 21, 21, 22, 22, 23, \
23, 24, 24, 25, 25, 26, 26, 27, \
27, 28, 28, 29, 29, 30, 30, 31, \
31, 32, 33, 34, 35, 36, 37, 38, \
39, 40, 41, 42, 43, 44, 45, 46, \
47, 49, 51, 53, 55, 57, 59, 61, \
63, 66, 70, 74, 78, 84, 92, 104, \
254, 231, 219, 211, 205, 201, 197, 193, \
190, 188, 186, 184, 182, 180, 178, 176, \
175, 174, 173, 172, 171, 170, 169, 168, \
167, 166, 165, 164, 163, 162, 161, 160, \
159, 159, 158, 158, 157, 157, 156, 156, \
155, 155, 154, 154, 153, 153, 152, 152, \
151, 151, 150, 150, 149, 149, 148, 148, \
147, 147, 146, 146, 145, 145, 144, 144, \
143, 143, 143, 143, 142, 142, 142, 142, \
141, 141, 141, 141, 140, 140, 140, 140, \
139, 139, 139, 139, 138, 138, 138, 138, \
137, 137, 137, 137, 136, 136, 136, 136, \
135, 135, 135, 135, 134, 134, 134, 134, \
133, 133, 133, 133, 132, 132, 132, 132, \
131, 131, 131, 131, 130, 130, 130, 130, \
129, 129, 129, 129, 128, 128, 128, 128, \
}
#define U8_TO_ALAW { \
42, 42, 42, 42, 42, 43, 43, 43, \
43, 40, 40, 40, 40, 41, 41, 41, \
41, 46, 46, 46, 46, 47, 47, 47, \
47, 44, 44, 44, 44, 45, 45, 45, \
45, 34, 34, 34, 34, 35, 35, 35, \
35, 32, 32, 32, 32, 33, 33, 33, \
33, 38, 38, 38, 38, 39, 39, 39, \
39, 36, 36, 36, 36, 37, 37, 37, \
37, 58, 58, 59, 59, 56, 56, 57, \
57, 62, 62, 63, 63, 60, 60, 61, \
61, 50, 50, 51, 51, 48, 48, 49, \
49, 54, 54, 55, 55, 52, 52, 53, \
53, 10, 11, 8, 9, 14, 15, 12, \
13, 2, 3, 0, 1, 6, 7, 4, \
5, 24, 30, 28, 18, 16, 22, 20, \
106, 110, 98, 102, 122, 114, 75, 90, \
213, 197, 245, 253, 229, 225, 237, 233, \
149, 151, 145, 147, 157, 159, 153, 155, \
133, 132, 135, 134, 129, 128, 131, 130, \
141, 140, 143, 142, 137, 136, 139, 138, \
181, 181, 180, 180, 183, 183, 182, 182, \
177, 177, 176, 176, 179, 179, 178, 178, \
189, 189, 188, 188, 191, 191, 190, 190, \
185, 185, 184, 184, 187, 187, 186, 186, \
165, 165, 165, 165, 164, 164, 164, 164, \
167, 167, 167, 167, 166, 166, 166, 166, \
161, 161, 161, 161, 160, 160, 160, 160, \
163, 163, 163, 163, 162, 162, 162, 162, \
173, 173, 173, 173, 172, 172, 172, 172, \
175, 175, 175, 175, 174, 174, 174, 174, \
169, 169, 169, 169, 168, 168, 168, 168, \
171, 171, 171, 171, 170, 170, 170, 170, \
}
#define _G711_TO_INTPCM(t, v) ((intpcm_t) \
((int8_t)((t)[(uint8_t)(v)] ^ 0x80)))
#define _INTPCM_TO_G711(t, v) ((t)[(uint8_t)((v) ^ 0x80)])
#define G711_DECLARE_TABLE(t) \
static const struct { \
const uint8_t ulaw_to_u8[G711_TABLE_SIZE]; \
const uint8_t alaw_to_u8[G711_TABLE_SIZE]; \
const uint8_t u8_to_ulaw[G711_TABLE_SIZE]; \
const uint8_t u8_to_alaw[G711_TABLE_SIZE]; \
} t = { \
ULAW_TO_U8, ALAW_TO_U8, \
U8_TO_ULAW, U8_TO_ALAW \
}
#define G711_DECLARE_OP(t) \
static __inline intpcm_t \
pcm_read_ulaw(uint8_t v) \
{ \
\
return (_G711_TO_INTPCM((t).ulaw_to_u8, v)); \
} \
\
static __inline intpcm_t \
pcm_read_alaw(uint8_t v) \
{ \
\
return (_G711_TO_INTPCM((t).alaw_to_u8, v)); \
} \
\
static __inline void \
pcm_write_ulaw(uint8_t *dst, intpcm_t v) \
{ \
\
*dst = _INTPCM_TO_G711((t).u8_to_ulaw, v); \
} \
\
static __inline void \
pcm_write_alaw(uint8_t *dst, intpcm_t v) \
{ \
\
*dst = _INTPCM_TO_G711((t).u8_to_alaw, v); \
}
#define G711_DECLARE(t) \
G711_DECLARE_TABLE(t); \
G711_DECLARE_OP(t)
#endif /* !_SND_G711_H_ */
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