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