1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
4  * Copyright (c) 2006-2009 Ariff Abdullah <ariff@FreeBSD.org>
6  * Copyright (c) 2024-2025 The FreeBSD Foundation
16  * 2. Redistributions in binary form must reproduce the above copyright
80 #define PCM_S8_MIN	 -0x80
82 #define PCM_S16_MIN	 -0x8000
84 #define PCM_S24_MIN	 -0x800000
88 #define PCM_S32_MIN	 -0x80000000L
91 #define PCM_S32_MIN	 -0x80000000LL
95 #define PCM_S32_MIN	(-0x7fffffff - 1)
98 /* Bytes-per-sample definition */
100 #define PCM_16_BPS	2
129 pcm_sample_read(const uint8_t *src, uint32_t fmt)  in pcm_sample_read()  argument
141 		v = _G711_TO_INTPCM(xlaw_conv_tables.ulaw_to_u8, *src);  in pcm_sample_read()
144 		v = _G711_TO_INTPCM(xlaw_conv_tables.alaw_to_u8, *src);  in pcm_sample_read()
147 		v = INTPCM_T((int8_t)*src);  in pcm_sample_read()
150 		v = INTPCM_T((int8_t)(*src ^ 0x80));  in pcm_sample_read()
153 		v = INTPCM_T(src[0] | (int8_t)src[1] << 8);  in pcm_sample_read()
156 		v = INTPCM_T(src[1] | (int8_t)src[0] << 8);  in pcm_sample_read()
159 		v = INTPCM_T(src[0] | (int8_t)(src[1] ^ 0x80) << 8);  in pcm_sample_read()
162 		v = INTPCM_T(src[1] | (int8_t)(src[0] ^ 0x80) << 8);  in pcm_sample_read()
165 		v = INTPCM_T(src[0] | src[1] << 8 | (int8_t)src[2] << 16);  in pcm_sample_read()
168 		v = INTPCM_T(src[2] | src[1] << 8 | (int8_t)src[0] << 16);  in pcm_sample_read()
171 		v = INTPCM_T(src[0] | src[1] << 8 |  in pcm_sample_read()
172 		    (int8_t)(src[2] ^ 0x80) << 16);  in pcm_sample_read()
175 		v = INTPCM_T(src[2] | src[1] << 8 |  in pcm_sample_read()
176 		    (int8_t)(src[0] ^ 0x80) << 16);  in pcm_sample_read()
179 		v = INTPCM_T(src[0] | src[1] << 8 | src[2] << 16 |  in pcm_sample_read()
180 		    (int8_t)src[3] << 24);  in pcm_sample_read()
183 		v = INTPCM_T(src[3] | src[2] << 8 | src[1] << 16 |  in pcm_sample_read()
184 		    (int8_t)src[0] << 24);  in pcm_sample_read()
187 		v = INTPCM_T(src[0] | src[1] << 8 | src[2] << 16 |  in pcm_sample_read()
188 		    (int8_t)(src[3] ^ 0x80) << 24);  in pcm_sample_read()
191 		v = INTPCM_T(src[3] | src[2] << 8 | src[1] << 16 |  in pcm_sample_read()
192 		    (int8_t)(src[0] ^ 0x80) << 24);  in pcm_sample_read()
197 			v = INTPCM_T(src[0] | src[1] << 8 | src[2] << 16 |  in pcm_sample_read()
198 			    (int8_t)src[3] << 24);  in pcm_sample_read()
200 			v = INTPCM_T(src[3] | src[2] << 8 | src[1] << 16 |  in pcm_sample_read()
201 			    (int8_t)src[0] << 24);  in pcm_sample_read()
204 		/* NaN, +/- Inf  or too small */  in pcm_sample_read()
215 		e += 8 - 127;  in pcm_sample_read()
217 			m >>= -e;  in pcm_sample_read()
220 		v = INTPCM_T((s == 0) ? m : -m);  in pcm_sample_read()
232  * Read sample and normalize to 32-bit magnitude.
235 pcm_sample_read_norm(const uint8_t *src, uint32_t fmt)  in pcm_sample_read_norm()  argument
237 	return (pcm_sample_read(src, fmt) << (32 - AFMT_BIT(fmt)));  in pcm_sample_read_norm()
244 pcm_sample_read_calc(const uint8_t *src, uint32_t fmt)  in pcm_sample_read_calc()  argument
248 	v = pcm_sample_read(src, fmt);  in pcm_sample_read_calc()
288 				v = -v;  in pcm_sample_write()
290 			e = 127 - 8;  in pcm_sample_write()
297 				e--;  in pcm_sample_write()
340 		dst[2] = v >> 16;  in pcm_sample_write()
343 		dst[2] = v;  in pcm_sample_write()
350 		dst[2] = (v >> 16) ^ 0x80;  in pcm_sample_write()
353 		dst[2] = v;  in pcm_sample_write()
361 		dst[2] = v >> 16;  in pcm_sample_write()
367 		dst[2] = v >> 8;  in pcm_sample_write()
374 		dst[2] = v >> 16;  in pcm_sample_write()
379 		dst[2] = v >> 8;  in pcm_sample_write()
395 	pcm_sample_write(dst, v >> (32 - AFMT_BIT(fmt)), fmt);  in pcm_sample_write_norm()
405 	/* Shift back to 32-bit magnitude. */  in pcm_sample_write_calc()