1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2008-2009 Ariff Abdullah <ariff@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * feeder_format: New generation of generic, any-to-any format converter, as 31 * long as the sample values can be read _and_ write. 32 */ 33 34 #ifdef _KERNEL 35 #ifdef HAVE_KERNEL_OPTION_HEADERS 36 #include "opt_snd.h" 37 #endif 38 #include <dev/sound/pcm/sound.h> 39 #include <dev/sound/pcm/pcm.h> 40 #include <dev/sound/pcm/g711.h> 41 #include <dev/sound/pcm/intpcm.h> 42 #include "feeder_if.h" 43 44 #define SND_USE_FXDIV 45 #include "snd_fxdiv_gen.h" 46 #endif 47 48 #define FEEDFORMAT_RESERVOIR (SND_CHN_MAX * PCM_32_BPS) 49 50 INTPCM_DECLARE(intpcm_conv_tables) 51 52 struct feed_format_info { 53 uint32_t ibps, obps; 54 uint32_t ialign, oalign, channels; 55 intpcm_read_t *read; 56 intpcm_write_t *write; 57 uint8_t reservoir[FEEDFORMAT_RESERVOIR]; 58 }; 59 60 /* 61 * dummy ac3/dts passthrough, etc. 62 * XXX assume as s16le. 63 */ 64 static __inline intpcm_t 65 intpcm_read_null(uint8_t *src __unused) 66 { 67 68 return (0); 69 } 70 71 static __inline void 72 intpcm_write_null(uint8_t *dst, intpcm_t v __unused) 73 { 74 75 _PCM_WRITE_S16_LE(dst, 0); 76 } 77 78 #define FEEDFORMAT_ENTRY(SIGN, BIT, ENDIAN) \ 79 { \ 80 AFMT_##SIGN##BIT##_##ENDIAN, \ 81 intpcm_read_##SIGN##BIT##ENDIAN, \ 82 intpcm_write_##SIGN##BIT##ENDIAN \ 83 } 84 85 static const struct { 86 uint32_t format; 87 intpcm_read_t *read; 88 intpcm_write_t *write; 89 } feed_format_ops[] = { 90 FEEDFORMAT_ENTRY(S, 8, NE), 91 FEEDFORMAT_ENTRY(S, 16, LE), 92 FEEDFORMAT_ENTRY(S, 24, LE), 93 FEEDFORMAT_ENTRY(S, 32, LE), 94 FEEDFORMAT_ENTRY(S, 16, BE), 95 FEEDFORMAT_ENTRY(S, 24, BE), 96 FEEDFORMAT_ENTRY(S, 32, BE), 97 FEEDFORMAT_ENTRY(U, 8, NE), 98 FEEDFORMAT_ENTRY(U, 16, LE), 99 FEEDFORMAT_ENTRY(U, 24, LE), 100 FEEDFORMAT_ENTRY(U, 32, LE), 101 FEEDFORMAT_ENTRY(U, 16, BE), 102 FEEDFORMAT_ENTRY(U, 24, BE), 103 FEEDFORMAT_ENTRY(U, 32, BE), 104 { 105 AFMT_MU_LAW, 106 intpcm_read_ulaw, intpcm_write_ulaw 107 }, 108 { 109 AFMT_A_LAW, 110 intpcm_read_alaw, intpcm_write_alaw 111 }, 112 { 113 AFMT_AC3, 114 intpcm_read_null, intpcm_write_null 115 } 116 }; 117 118 static int 119 feed_format_init(struct pcm_feeder *f) 120 { 121 struct feed_format_info *info; 122 intpcm_read_t *rd_op; 123 intpcm_write_t *wr_op; 124 size_t i; 125 126 if (f->desc->in == f->desc->out || 127 AFMT_CHANNEL(f->desc->in) != AFMT_CHANNEL(f->desc->out)) 128 return (EINVAL); 129 130 rd_op = NULL; 131 wr_op = NULL; 132 133 for (i = 0; i < nitems(feed_format_ops) && 134 (rd_op == NULL || wr_op == NULL); i++) { 135 if (rd_op == NULL && 136 AFMT_ENCODING(f->desc->in) == feed_format_ops[i].format) 137 rd_op = feed_format_ops[i].read; 138 if (wr_op == NULL && 139 AFMT_ENCODING(f->desc->out) == feed_format_ops[i].format) 140 wr_op = feed_format_ops[i].write; 141 } 142 143 if (rd_op == NULL || wr_op == NULL) { 144 printf("%s(): failed to initialize io ops " 145 "in=0x%08x out=0x%08x\n", 146 __func__, f->desc->in, f->desc->out); 147 return (EINVAL); 148 } 149 150 info = malloc(sizeof(*info), M_DEVBUF, M_NOWAIT | M_ZERO); 151 if (info == NULL) 152 return (ENOMEM); 153 154 info->channels = AFMT_CHANNEL(f->desc->in); 155 156 info->ibps = AFMT_BPS(f->desc->in); 157 info->ialign = info->ibps * info->channels; 158 info->read = rd_op; 159 160 info->obps = AFMT_BPS(f->desc->out); 161 info->oalign = info->obps * info->channels; 162 info->write = wr_op; 163 164 f->data = info; 165 166 return (0); 167 } 168 169 static int 170 feed_format_free(struct pcm_feeder *f) 171 { 172 struct feed_format_info *info; 173 174 info = f->data; 175 if (info != NULL) 176 free(info, M_DEVBUF); 177 178 f->data = NULL; 179 180 return (0); 181 } 182 183 static int 184 feed_format_set(struct pcm_feeder *f, int what, int value) 185 { 186 struct feed_format_info *info; 187 188 info = f->data; 189 190 switch (what) { 191 case FEEDFORMAT_CHANNELS: 192 if (value < SND_CHN_MIN || value > SND_CHN_MAX) 193 return (EINVAL); 194 info->channels = (uint32_t)value; 195 info->ialign = info->ibps * info->channels; 196 info->oalign = info->obps * info->channels; 197 break; 198 default: 199 return (EINVAL); 200 break; 201 } 202 203 return (0); 204 } 205 206 static int 207 feed_format_feed(struct pcm_feeder *f, struct pcm_channel *c, uint8_t *b, 208 uint32_t count, void *source) 209 { 210 struct feed_format_info *info; 211 intpcm_t v; 212 uint32_t j; 213 uint8_t *src, *dst; 214 215 info = f->data; 216 dst = b; 217 count = SND_FXROUND(count, info->oalign); 218 219 do { 220 if (count < info->oalign) 221 break; 222 223 if (count < info->ialign) { 224 src = info->reservoir; 225 j = info->ialign; 226 } else { 227 if (info->ialign == info->oalign) 228 j = count; 229 else if (info->ialign > info->oalign) 230 j = SND_FXROUND(count, info->ialign); 231 else 232 j = SND_FXDIV(count, info->oalign) * 233 info->ialign; 234 src = dst + count - j; 235 } 236 237 j = SND_FXDIV(FEEDER_FEED(f->source, c, src, j, source), 238 info->ialign); 239 if (j == 0) 240 break; 241 242 j *= info->channels; 243 count -= j * info->obps; 244 245 do { 246 v = info->read(src); 247 info->write(dst, v); 248 dst += info->obps; 249 src += info->ibps; 250 } while (--j != 0); 251 252 } while (count != 0); 253 254 return (dst - b); 255 } 256 257 static struct pcm_feederdesc feeder_format_desc[] = { 258 { FEEDER_FORMAT, 0, 0, 0, 0 }, 259 { 0, 0, 0, 0, 0 } 260 }; 261 262 static kobj_method_t feeder_format_methods[] = { 263 KOBJMETHOD(feeder_init, feed_format_init), 264 KOBJMETHOD(feeder_free, feed_format_free), 265 KOBJMETHOD(feeder_set, feed_format_set), 266 KOBJMETHOD(feeder_feed, feed_format_feed), 267 KOBJMETHOD_END 268 }; 269 270 FEEDER_DECLARE(feeder_format, NULL); 271 272 /* Extern */ 273 intpcm_read_t * 274 feeder_format_read_op(uint32_t format) 275 { 276 size_t i; 277 278 for (i = 0; i < nitems(feed_format_ops); i++) { 279 if (AFMT_ENCODING(format) == feed_format_ops[i].format) 280 return (feed_format_ops[i].read); 281 } 282 283 return (NULL); 284 } 285 286 intpcm_write_t * 287 feeder_format_write_op(uint32_t format) 288 { 289 size_t i; 290 291 for (i = 0; i < nitems(feed_format_ops); i++) { 292 if (AFMT_ENCODING(format) == feed_format_ops[i].format) 293 return (feed_format_ops[i].write); 294 } 295 296 return (NULL); 297 } 298