FreeCalypso > hg > gsm-codec-lib
changeset 219:dc52c3857bf7
miscutil: new program pcm16-to-alaw
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sat, 22 Apr 2023 20:34:49 +0000 |
| parents | f4f68c652e98 |
| children | c4c45148cde1 |
| files | .hgignore miscutil/Makefile miscutil/pcm16-to-alaw.c |
| diffstat | 3 files changed, 330 insertions(+), 1 deletions(-) [+] |
line wrap: on
line diff
--- a/.hgignore Fri Apr 21 23:41:56 2023 +0000 +++ b/.hgignore Sat Apr 22 20:34:49 2023 +0000 @@ -43,4 +43,5 @@ ^miscutil/gsmrec-dump$ ^miscutil/pcm16-raw2wav$ +^miscutil/pcm16-to-alaw$ ^miscutil/pcm16-wav2raw$
--- a/miscutil/Makefile Fri Apr 21 23:41:56 2023 +0000 +++ b/miscutil/Makefile Sat Apr 22 20:34:49 2023 +0000 @@ -1,6 +1,6 @@ CC= gcc CFLAGS= -O2 -PROGS= gsmrec-dump pcm16-raw2wav pcm16-wav2raw +PROGS= gsmrec-dump pcm16-raw2wav pcm16-to-alaw pcm16-wav2raw LIBEFR= ../libgsmefr/libgsmefr.a LIBTEST=../libtest/libtest.a INSTBIN=/opt/freecalypso/bin @@ -13,6 +13,9 @@ pcm16-raw2wav: raw2wav.o ${LIBTEST} ${CC} ${CFLAGS} -o $@ raw2wav.o ${LIBTEST} +pcm16-to-alaw: pcm16-to-alaw.c + ${CC} ${CFLAGS} -o $@ $@.c + pcm16-wav2raw: wav2raw.o ${LIBTEST} ${CC} ${CFLAGS} -o $@ wav2raw.o ${LIBTEST}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/miscutil/pcm16-to-alaw.c Sat Apr 22 20:34:49 2023 +0000 @@ -0,0 +1,325 @@ +/* + * This program reads a 16-bit PCM recording in raw format (robe by default, + * or LE with -l option) and converts it to 8-bit PCM in European A-law + * encoding. It is based on toast_alaw.c from libgsm/toast package by + * Jutta Degener and Carsten Bormann, Technische Universitaet Berlin. + */ + +#include <stdio.h> +#include <stdint.h> +#include <stdlib.h> +#include <string.h> +#include <strings.h> + +#define S2A(x) (s2a[ ((unsigned short)(x)) >> 4 ]) + +static unsigned char s2a[] = { + 213,212,215,214,209,208,211,210,221,220,223,222,217,216,219,218, + 197,196,199,198,193,192,195,194,205,204,207,206,201,200,203,202, + 245,245,244,244,247,247,246,246,241,241,240,240,243,243,242,242, + 253,253,252,252,255,255,254,254,249,249,248,248,251,251,250,250, + 229,229,229,229,228,228,228,228,231,231,231,231,230,230,230,230, + 225,225,225,225,224,224,224,224,227,227,227,227,226,226,226,226, + 237,237,237,237,236,236,236,236,239,239,239,239,238,238,238,238, + 233,233,233,233,232,232,232,232,235,235,235,235,234,234,234,234, + 149,149,149,149,149,149,149,149,148,148,148,148,148,148,148,148, + 151,151,151,151,151,151,151,151,150,150,150,150,150,150,150,150, + 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16, 16, 17, 17, 17, 17, 17, 17, 17, 17, + 22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 23, 23, 23, + 20, 20, 20, 20, 20, 20, 20, 20, 21, 21, 21, 21, 21, 21, 21, 21, + 106,106,106,106,107,107,107,107,104,104,104,104,105,105,105,105, + 110,110,110,110,111,111,111,111,108,108,108,108,109,109,109,109, + 98, 98, 98, 98, 99, 99, 99, 99, 96, 96, 96, 96, 97, 97, 97, 97, + 102,102,102,102,103,103,103,103,100,100,100,100,101,101,101,101, + 122,122,123,123,120,120,121,121,126,126,127,127,124,124,125,125, + 114,114,115,115,112,112,113,113,118,118,119,119,116,116,117,117, + 74, 75, 72, 73, 78, 79, 76, 77, 66, 67, 64, 65, 70, 71, 68, 69, + 90, 91, 88, 89, 94, 95, 92, 93, 82, 83, 80, 81, 86, 87, 84, 85 +}; + +main(argc, argv) + char **argv; +{ + int little_endian; + char *infname, *outfname; + FILE *inf, *outf; + uint8_t inb[2]; + uint16_t ins; + int cc; + + if (argc == 3 && argv[1][0] != '-') { + little_endian = 0; + infname = argv[1]; + outfname = argv[2]; + } else if (argc == 4 && !strcmp(argv[1], "-l")) { + little_endian = 1; + infname = argv[2]; + outfname = argv[3]; + } else { + fprintf(stderr, "usage: %s [-l] input.pcm16 output.alaw\n", + argv[0]); + exit(1); + } + inf = fopen(infname, "r"); + if (!inf) { + perror(infname); + exit(1); + } + outf = fopen(outfname, "w"); + if (!outf) { + perror(outfname); + exit(1); + } + for (;;) { + cc = fread(inb, 1, 2, inf); + if (cc <= 0) + break; + if (cc & 1) { + fprintf(stderr, "error: %s has odd number of bytes\n", + infname); + exit(1); + } + if (little_endian) + ins = ((uint16_t) inb[1] << 8) | ((uint16_t) inb[0]); + else + ins = ((uint16_t) inb[0] << 8) | ((uint16_t) inb[1]); + putc(S2A(ins), outf); + } + fclose(outf); + exit(0); +}