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author | ariff <ariff@FreeBSD.org> | 2009-06-07 19:12:08 +0000 |
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committer | ariff <ariff@FreeBSD.org> | 2009-06-07 19:12:08 +0000 |
commit | e3faadaafebd1b18fd6b8ed30f654df974d390a6 (patch) | |
tree | 906f402638735c3f32e226f6868f207db569d6a9 /sys/dev/sound/isa/mss.c | |
parent | f482e4a9e0f02a82e107e2bbee139c6a0b48be80 (diff) | |
download | FreeBSD-src-e3faadaafebd1b18fd6b8ed30f654df974d390a6.zip FreeBSD-src-e3faadaafebd1b18fd6b8ed30f654df974d390a6.tar.gz |
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.
Diffstat (limited to 'sys/dev/sound/isa/mss.c')
-rw-r--r-- | sys/dev/sound/isa/mss.c | 64 |
1 files changed, 34 insertions, 30 deletions
diff --git a/sys/dev/sound/isa/mss.c b/sys/dev/sound/isa/mss.c index 411296b..cc62df3 100644 --- a/sys/dev/sound/isa/mss.c +++ b/sys/dev/sound/isa/mss.c @@ -27,6 +27,10 @@ * SUCH DAMAGE. */ +#ifdef HAVE_KERNEL_OPTION_HEADERS +#include "opt_snd.h" +#endif + #include <dev/sound/pcm/sound.h> SND_DECLARE_FILE("$FreeBSD$"); @@ -128,34 +132,34 @@ static int pnpmss_attach(device_t dev); static driver_intr_t opti931_intr; static u_int32_t mss_fmt[] = { - AFMT_U8, - AFMT_STEREO | AFMT_U8, - AFMT_S16_LE, - AFMT_STEREO | AFMT_S16_LE, - AFMT_MU_LAW, - AFMT_STEREO | AFMT_MU_LAW, - AFMT_A_LAW, - AFMT_STEREO | AFMT_A_LAW, + SND_FORMAT(AFMT_U8, 1, 0), + SND_FORMAT(AFMT_U8, 2, 0), + SND_FORMAT(AFMT_S16_LE, 1, 0), + SND_FORMAT(AFMT_S16_LE, 2, 0), + SND_FORMAT(AFMT_MU_LAW, 1, 0), + SND_FORMAT(AFMT_MU_LAW, 2, 0), + SND_FORMAT(AFMT_A_LAW, 1, 0), + SND_FORMAT(AFMT_A_LAW, 2, 0), 0 }; static struct pcmchan_caps mss_caps = {4000, 48000, mss_fmt, 0}; static u_int32_t guspnp_fmt[] = { - AFMT_U8, - AFMT_STEREO | AFMT_U8, - AFMT_S16_LE, - AFMT_STEREO | AFMT_S16_LE, - AFMT_A_LAW, - AFMT_STEREO | AFMT_A_LAW, + SND_FORMAT(AFMT_U8, 1, 0), + SND_FORMAT(AFMT_U8, 2, 0), + SND_FORMAT(AFMT_S16_LE, 1, 0), + SND_FORMAT(AFMT_S16_LE, 2, 0), + SND_FORMAT(AFMT_A_LAW, 1, 0), + SND_FORMAT(AFMT_A_LAW, 2, 0), 0 }; static struct pcmchan_caps guspnp_caps = {4000, 48000, guspnp_fmt, 0}; static u_int32_t opti931_fmt[] = { - AFMT_U8, - AFMT_STEREO | AFMT_U8, - AFMT_S16_LE, - AFMT_STEREO | AFMT_S16_LE, + SND_FORMAT(AFMT_U8, 1, 0), + SND_FORMAT(AFMT_U8, 2, 0), + SND_FORMAT(AFMT_S16_LE, 1, 0), + SND_FORMAT(AFMT_S16_LE, 2, 0), 0 }; static struct pcmchan_caps opti931_caps = {4000, 48000, opti931_fmt, 0}; @@ -520,7 +524,7 @@ mssmix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right) return left | (right << 8); } -static int +static u_int32_t mssmix_setrecsrc(struct snd_mixer *m, u_int32_t src) { struct mss_info *mss = mix_getdevinfo(m); @@ -535,7 +539,7 @@ static kobj_method_t mssmix_mixer_methods[] = { KOBJMETHOD(mixer_init, mssmix_init), KOBJMETHOD(mixer_set, mssmix_set), KOBJMETHOD(mixer_setrecsrc, mssmix_setrecsrc), - { 0, 0 } + KOBJMETHOD_END }; MIXER_DECLARE(mssmix_mixer); @@ -604,7 +608,7 @@ ymmix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right) return left | (right << 8); } -static int +static u_int32_t ymmix_setrecsrc(struct snd_mixer *m, u_int32_t src) { struct mss_info *mss = mix_getdevinfo(m); @@ -618,7 +622,7 @@ static kobj_method_t ymmix_mixer_methods[] = { KOBJMETHOD(mixer_init, ymmix_init), KOBJMETHOD(mixer_set, ymmix_set), KOBJMETHOD(mixer_setrecsrc, ymmix_setrecsrc), - { 0, 0 } + KOBJMETHOD_END }; MIXER_DECLARE(ymmix_mixer); @@ -997,7 +1001,7 @@ static int mss_format(struct mss_chinfo *ch, u_int32_t format) { struct mss_info *mss = ch->parent; - int i, arg = format & ~AFMT_STEREO; + int i, arg = AFMT_ENCODING(format); /* * The data format uses 3 bits (just 2 on the 1848). For each @@ -1014,7 +1018,7 @@ mss_format(struct mss_chinfo *ch, u_int32_t format) ch->fmt = format; for (i = 0; i < 8; i++) if (arg == fmts[i]) break; arg = i << 1; - if (format & AFMT_STEREO) arg |= 1; + if (AFMT_CHANNEL(format) > 1) arg |= 1; arg <<= 4; ad_enter_MCE(mss); ad_write(mss, 8, (ad_read(mss, 8) & 0x0f) | arg); @@ -1035,7 +1039,7 @@ mss_trigger(struct mss_chinfo *ch, int go) int retry, wr, cnt, ss; ss = 1; - ss <<= (ch->fmt & AFMT_STEREO)? 1 : 0; + ss <<= (AFMT_CHANNEL(ch->fmt) > 1)? 1 : 0; ss <<= (ch->fmt & AFMT_16BIT)? 1 : 0; wr = (ch->dir == PCMDIR_PLAY)? 1 : 0; @@ -1170,12 +1174,12 @@ msschan_setformat(kobj_t obj, void *data, u_int32_t format) return 0; } -static int +static u_int32_t msschan_setspeed(kobj_t obj, void *data, u_int32_t speed) { struct mss_chinfo *ch = data; struct mss_info *mss = ch->parent; - int r; + u_int32_t r; mss_lock(mss); r = mss_speed(ch, speed); @@ -1184,7 +1188,7 @@ msschan_setspeed(kobj_t obj, void *data, u_int32_t speed) return r; } -static int +static u_int32_t msschan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize) { struct mss_chinfo *ch = data; @@ -1211,7 +1215,7 @@ msschan_trigger(kobj_t obj, void *data, int go) return 0; } -static int +static u_int32_t msschan_getptr(kobj_t obj, void *data) { struct mss_chinfo *ch = data; @@ -1247,7 +1251,7 @@ static kobj_method_t msschan_methods[] = { KOBJMETHOD(channel_trigger, msschan_trigger), KOBJMETHOD(channel_getptr, msschan_getptr), KOBJMETHOD(channel_getcaps, msschan_getcaps), - { 0, 0 } + KOBJMETHOD_END }; CHANNEL_DECLARE(msschan); |