FreeCalypso > hg > gsm-codec-lib

changeset 232:8710c94df334

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miscutil: new program pcm8-to-pcm16
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 07 May 2023 19:03:36 +0000
parents 67cbfa0aeb1c
children bbdefd2ef950
files .hgignore miscutil/Makefile miscutil/pcm8-to-pcm16.c
diffstat 3 files changed, 146 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/.hgignore	Sun May 07 18:08:12 2023 +0000
+++ b/.hgignore	Sun May 07 19:03:36 2023 +0000
@@ -57,3 +57,4 @@
 ^miscutil/pcm16-to-alaw$
 ^miscutil/pcm16-to-ulaw$
 ^miscutil/pcm16-wav2raw$
+^miscutil/pcm8-to-pcm16$
--- a/miscutil/Makefile	Sun May 07 18:08:12 2023 +0000
+++ b/miscutil/Makefile	Sun May 07 19:03:36 2023 +0000
@@ -1,7 +1,7 @@
 CC=	gcc
 CFLAGS=	-O2
 PROGS=	gsmrec-dump pcm16-check13 pcm16-raw2wav pcm16-to-alaw pcm16-to-ulaw \
-	pcm16-wav2raw
+	pcm16-wav2raw pcm8-to-pcm16
 LIBEFR=	../libgsmefr/libgsmefr.a
 LIBTEST=../libtest/libtest.a
 INSTBIN=/opt/freecalypso/bin
@@ -26,6 +26,9 @@
 pcm16-wav2raw:	wav2raw.o ${LIBTEST}
 	${CC} ${CFLAGS} -o $@ wav2raw.o ${LIBTEST}
 
+pcm8-to-pcm16:	pcm8-to-pcm16.c
+	${CC} ${CFLAGS} -o $@ $@.c
+
 install:
 	mkdir -p ${INSTBIN}
 	install -c ${PROGS} ${INSTBIN}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/miscutil/pcm8-to-pcm16.c	Sun May 07 19:03:36 2023 +0000
@@ -0,0 +1,141 @@
+/*
+ * This program reads an 8-bit PCM recording in either A-law or mu-law
+ * encoding (needs to be specified on the command line) and converts it
+ * to 16-bit linear PCM.  Both input and output file formats are raw binary;
+ * the output format is robe by default or can be changed to LE via
+ * an additional command line argument.
+ *
+ * The expansion tables for A-law and mu-law have been generated by
+ * developer aid programs in the ../dev directory.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+
+uint16_t pcma_decode_table[256] = {
+	60032, 60288, 59520, 59776, 61056, 61312, 60544, 60800,
+	57984, 58240, 57472, 57728, 59008, 59264, 58496, 58752,
+	62784, 62912, 62528, 62656, 63296, 63424, 63040, 63168,
+	61760, 61888, 61504, 61632, 62272, 62400, 62016, 62144,
+	43520, 44544, 41472, 42496, 47616, 48640, 45568, 46592,
+	35328, 36352, 33280, 34304, 39424, 40448, 37376, 38400,
+	54528, 55040, 53504, 54016, 56576, 57088, 55552, 56064,
+	50432, 50944, 49408, 49920, 52480, 52992, 51456, 51968,
+	65192, 65208, 65160, 65176, 65256, 65272, 65224, 65240,
+	65064, 65080, 65032, 65048, 65128, 65144, 65096, 65112,
+	65448, 65464, 65416, 65432, 65512, 65528, 65480, 65496,
+	65320, 65336, 65288, 65304, 65384, 65400, 65352, 65368,
+	64160, 64224, 64032, 64096, 64416, 64480, 64288, 64352,
+	63648, 63712, 63520, 63584, 63904, 63968, 63776, 63840,
+	64848, 64880, 64784, 64816, 64976, 65008, 64912, 64944,
+	64592, 64624, 64528, 64560, 64720, 64752, 64656, 64688,
+	 5504,  5248,  6016,  5760,  4480,  4224,  4992,  4736,
+	 7552,  7296,  8064,  7808,  6528,  6272,  7040,  6784,
+	 2752,  2624,  3008,  2880,  2240,  2112,  2496,  2368,
+	 3776,  3648,  4032,  3904,  3264,  3136,  3520,  3392,
+	22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
+	30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
+	11008, 10496, 12032, 11520,  8960,  8448,  9984,  9472,
+	15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
+	  344,   328,   376,   360,   280,   264,   312,   296,
+	  472,   456,   504,   488,   408,   392,   440,   424,
+	   88,    72,   120,   104,    24,     8,    56,    40,
+	  216,   200,   248,   232,   152,   136,   184,   168,
+	 1376,  1312,  1504,  1440,  1120,  1056,  1248,  1184,
+	 1888,  1824,  2016,  1952,  1632,  1568,  1760,  1696,
+	  688,   656,   752,   720,   560,   528,   624,   592,
+	  944,   912,  1008,   976,   816,   784,   880,   848,
+};
+
+uint16_t pcmu_decode_table[256] = {
+	33412, 34436, 35460, 36484, 37508, 38532, 39556, 40580,
+	41604, 42628, 43652, 44676, 45700, 46724, 47748, 48772,
+	49540, 50052, 50564, 51076, 51588, 52100, 52612, 53124,
+	53636, 54148, 54660, 55172, 55684, 56196, 56708, 57220,
+	57604, 57860, 58116, 58372, 58628, 58884, 59140, 59396,
+	59652, 59908, 60164, 60420, 60676, 60932, 61188, 61444,
+	61636, 61764, 61892, 62020, 62148, 62276, 62404, 62532,
+	62660, 62788, 62916, 63044, 63172, 63300, 63428, 63556,
+	63652, 63716, 63780, 63844, 63908, 63972, 64036, 64100,
+	64164, 64228, 64292, 64356, 64420, 64484, 64548, 64612,
+	64660, 64692, 64724, 64756, 64788, 64820, 64852, 64884,
+	64916, 64948, 64980, 65012, 65044, 65076, 65108, 65140,
+	65164, 65180, 65196, 65212, 65228, 65244, 65260, 65276,
+	65292, 65308, 65324, 65340, 65356, 65372, 65388, 65404,
+	65416, 65424, 65432, 65440, 65448, 65456, 65464, 65472,
+	65480, 65488, 65496, 65504, 65512, 65520, 65528,     0,
+	32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
+	23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
+	15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
+	11900, 11388, 10876, 10364,  9852,  9340,  8828,  8316,
+	 7932,  7676,  7420,  7164,  6908,  6652,  6396,  6140,
+	 5884,  5628,  5372,  5116,  4860,  4604,  4348,  4092,
+	 3900,  3772,  3644,  3516,  3388,  3260,  3132,  3004,
+	 2876,  2748,  2620,  2492,  2364,  2236,  2108,  1980,
+	 1884,  1820,  1756,  1692,  1628,  1564,  1500,  1436,
+	 1372,  1308,  1244,  1180,  1116,  1052,   988,   924,
+	  876,   844,   812,   780,   748,   716,   684,   652,
+	  620,   588,   556,   524,   492,   460,   428,   396,
+	  372,   356,   340,   324,   308,   292,   276,   260,
+	  244,   228,   212,   196,   180,   164,   148,   132,
+	  120,   112,   104,    96,    88,    80,    72,    64,
+	   56,    48,    40,    32,    24,    16,     8,     0,
+};
+
+main(argc, argv)
+	char **argv;
+{
+	uint16_t *exp_table;
+	int little_endian;
+	FILE *inf, *outf;
+	int inp;
+	unsigned out;
+
+	if (argc < 4 || argc > 5) {
+usage:		fprintf(stderr,
+			"usage: %s alaw|ulaw input.pcm8 output.pcm16 [le]\n",
+			argv[0]);
+		exit(1);
+	}
+	if (!strcmp(argv[1], "alaw"))
+		exp_table = pcma_decode_table;
+	else if (!strcmp(argv[1], "ulaw"))
+		exp_table = pcmu_decode_table;
+	else
+		goto usage;
+	if (argc == 4)
+		little_endian = 0;
+	else {
+		if (strcmp(argv[4], "le"))
+			goto usage;
+		little_endian = 1;
+	}
+	inf = fopen(argv[2], "r");
+	if (!inf) {
+		perror(argv[2]);
+		exit(1);
+	}
+	outf = fopen(argv[3], "w");
+	if (!outf) {
+		perror(argv[3]);
+		exit(1);
+	}
+	for (;;) {
+		inp = getc(inf);
+		if (inp == EOF)
+			break;
+		out = exp_table[inp];
+		if (little_endian) {
+			putc(out & 0xFF, outf);
+			putc((out >> 8) & 0xFF, outf);
+		} else {
+			putc((out >> 8) & 0xFF, outf);
+			putc(out & 0xFF, outf);
+		}
+	}
+	fclose(outf);
+	exit(0);
+}