185 lines
6.6 KiB
C
185 lines
6.6 KiB
C
/*-
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* Copyright (c) 2005 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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/* feeder_volume, a long 'Lost Technology' rather than a new feature. */
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#include <dev/sound/pcm/sound.h>
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#include "feeder_if.h"
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SND_DECLARE_FILE("$FreeBSD$");
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#define FVOL_OSS_SCALE 100
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#define FVOL_RESOLUTION PCM_FXSHIFT
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#define FVOL_CLAMP(val) (((val) << FVOL_RESOLUTION) / FVOL_OSS_SCALE)
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#define FVOL_LEFT(val) FVOL_CLAMP((val) & 0x7f)
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#define FVOL_RIGHT(val) FVOL_LEFT((val) >> 8)
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#define FVOL_MAX (1 << FVOL_RESOLUTION)
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#define FVOL_CALC(sval, vval) (((sval) * (vval)) >> FVOL_RESOLUTION)
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typedef uint32_t (*feed_volume_filter)(uint8_t *, int *, uint32_t);
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#define FEEDER_VOLUME_FILTER(FMTBIT, VOL_INTCAST, SIGN, SIGNS, ENDIAN, ENDIANS) \
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static uint32_t \
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feed_volume_filter_##SIGNS##FMTBIT##ENDIANS(uint8_t *b, int *vol, \
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uint32_t count) \
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{ \
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int32_t j; \
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int i; \
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\
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i = count; \
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b += i; \
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\
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do { \
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b -= PCM_##FMTBIT##_BPS; \
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i -= PCM_##FMTBIT##_BPS; \
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j = PCM_READ_##SIGN##FMTBIT##_##ENDIAN(b); \
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j = FVOL_CALC((VOL_INTCAST)j, \
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vol[(i / PCM_##FMTBIT##_BPS) & 1]); \
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PCM_WRITE_##SIGN##FMTBIT##_##ENDIAN(b, j); \
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} while (i != 0); \
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\
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return (count); \
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}
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FEEDER_VOLUME_FILTER(8, int32_t, S, s, NE, ne)
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FEEDER_VOLUME_FILTER(16, int32_t, S, s, LE, le)
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FEEDER_VOLUME_FILTER(24, int32_t, S, s, LE, le)
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FEEDER_VOLUME_FILTER(32, intpcm_t, S, s, LE, le)
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FEEDER_VOLUME_FILTER(16, int32_t, S, s, BE, be)
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FEEDER_VOLUME_FILTER(24, int32_t, S, s, BE, be)
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FEEDER_VOLUME_FILTER(32, intpcm_t, S, s, BE, be)
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FEEDER_VOLUME_FILTER(8, int32_t, U, u, NE, ne)
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FEEDER_VOLUME_FILTER(16, int32_t, U, u, LE, le)
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FEEDER_VOLUME_FILTER(24, int32_t, U, u, LE, le)
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FEEDER_VOLUME_FILTER(32, intpcm_t, U, u, LE, le)
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FEEDER_VOLUME_FILTER(16, int32_t, U, u, BE, be)
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FEEDER_VOLUME_FILTER(24, int32_t, U, u, BE, be)
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FEEDER_VOLUME_FILTER(32, intpcm_t, U, u, BE, be)
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struct feed_volume_info {
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uint32_t format;
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int bps;
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feed_volume_filter filter;
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};
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static struct feed_volume_info feed_volume_tbl[] = {
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{ AFMT_S8, PCM_8_BPS, feed_volume_filter_s8ne },
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{ AFMT_S16_LE, PCM_16_BPS, feed_volume_filter_s16le },
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{ AFMT_S24_LE, PCM_24_BPS, feed_volume_filter_s24le },
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{ AFMT_S32_LE, PCM_32_BPS, feed_volume_filter_s32le },
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{ AFMT_S16_BE, PCM_16_BPS, feed_volume_filter_s16be },
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{ AFMT_S24_BE, PCM_24_BPS, feed_volume_filter_s24be },
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{ AFMT_S32_BE, PCM_32_BPS, feed_volume_filter_s32be },
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{ AFMT_U8, PCM_8_BPS, feed_volume_filter_u8ne },
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{ AFMT_U16_LE, PCM_16_BPS, feed_volume_filter_u16le },
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{ AFMT_U24_LE, PCM_24_BPS, feed_volume_filter_u24le },
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{ AFMT_U32_LE, PCM_32_BPS, feed_volume_filter_u32le },
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{ AFMT_U16_BE, PCM_16_BPS, feed_volume_filter_u16be },
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{ AFMT_U24_BE, PCM_24_BPS, feed_volume_filter_u24be },
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{ AFMT_U32_BE, PCM_32_BPS, feed_volume_filter_u32be },
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};
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#define FVOL_DATA(i, c) ((intptr_t)((((i) & 0x1f) << 4) | ((c) & 0xf)))
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#define FVOL_INFOIDX(m) (((m) >> 4) & 0x1f)
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#define FVOL_CHANNELS(m) ((m) & 0xf)
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static int
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feed_volume_init(struct pcm_feeder *f)
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{
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int i, channels;
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if (f->desc->in != f->desc->out)
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return (EINVAL);
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/* For now, this is mandatory! */
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if (!(f->desc->out & AFMT_STEREO))
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return (EINVAL);
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channels = 2;
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for (i = 0; i < sizeof(feed_volume_tbl) / sizeof(feed_volume_tbl[0]);
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i++) {
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if ((f->desc->out & ~AFMT_STEREO) ==
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feed_volume_tbl[i].format) {
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f->data = (void *)FVOL_DATA(i, channels);
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return (0);
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}
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}
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return (-1);
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}
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static int
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feed_volume(struct pcm_feeder *f, struct pcm_channel *c, uint8_t *b,
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uint32_t count, void *source)
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{
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struct feed_volume_info *info;
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int vol[2];
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int k, smpsz;
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vol[0] = FVOL_LEFT(c->volume);
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vol[1] = FVOL_RIGHT(c->volume);
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if (vol[0] == FVOL_MAX && vol[1] == FVOL_MAX)
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return (FEEDER_FEED(f->source, c, b, count, source));
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info = &feed_volume_tbl[FVOL_INFOIDX((intptr_t)f->data)];
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smpsz = info->bps * FVOL_CHANNELS((intptr_t)f->data);
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if (count < smpsz)
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return (0);
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k = FEEDER_FEED(f->source, c, b, count - (count % smpsz), source);
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if (k < smpsz)
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return (0);
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k -= k % smpsz;
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return (info->filter(b, vol, k));
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}
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static struct pcm_feederdesc feeder_volume_desc[] = {
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{FEEDER_VOLUME, AFMT_S8 | AFMT_STEREO, AFMT_S8 | AFMT_STEREO, 0},
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{FEEDER_VOLUME, AFMT_S16_LE | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0},
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{FEEDER_VOLUME, AFMT_S24_LE | AFMT_STEREO, AFMT_S24_LE | AFMT_STEREO, 0},
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{FEEDER_VOLUME, AFMT_S32_LE | AFMT_STEREO, AFMT_S32_LE | AFMT_STEREO, 0},
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{FEEDER_VOLUME, AFMT_S16_BE | AFMT_STEREO, AFMT_S16_BE | AFMT_STEREO, 0},
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{FEEDER_VOLUME, AFMT_S24_BE | AFMT_STEREO, AFMT_S24_BE | AFMT_STEREO, 0},
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{FEEDER_VOLUME, AFMT_S32_BE | AFMT_STEREO, AFMT_S32_BE | AFMT_STEREO, 0},
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{FEEDER_VOLUME, AFMT_U8 | AFMT_STEREO, AFMT_U8 | AFMT_STEREO, 0},
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{FEEDER_VOLUME, AFMT_U16_LE | AFMT_STEREO, AFMT_U16_LE | AFMT_STEREO, 0},
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{FEEDER_VOLUME, AFMT_U24_LE | AFMT_STEREO, AFMT_U24_LE | AFMT_STEREO, 0},
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{FEEDER_VOLUME, AFMT_U32_LE | AFMT_STEREO, AFMT_U32_LE | AFMT_STEREO, 0},
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{FEEDER_VOLUME, AFMT_U16_BE | AFMT_STEREO, AFMT_U16_BE | AFMT_STEREO, 0},
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{FEEDER_VOLUME, AFMT_U24_BE | AFMT_STEREO, AFMT_U24_BE | AFMT_STEREO, 0},
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{FEEDER_VOLUME, AFMT_U32_BE | AFMT_STEREO, AFMT_U32_BE | AFMT_STEREO, 0},
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{0, 0, 0, 0},
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};
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static kobj_method_t feeder_volume_methods[] = {
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KOBJMETHOD(feeder_init, feed_volume_init),
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KOBJMETHOD(feeder_feed, feed_volume),
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{0, 0}
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};
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FEEDER_DECLARE(feeder_volume, 2, NULL);
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