forked from sox_ng/sox_ng
dc69014297
The output file is 65% the size of before and is more readable, timestamps are to a millionth of a second to keep up to 384kHz happy and samples are to the precision necessary for one bit of an int32 and aligned so that the minus sign doesn't shift everything right.
50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
/*
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* samples.c: Given a list of decimal values,
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* output binary little-endian sample values for them.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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static void usage(void)
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{
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fprintf(stderr, "Usage: samples [-b n] [sample_value] ...\n");
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fprintf(stderr, "-b Set the number of bits to output per sample (default: 16)\n");
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}
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int
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main(int argc, char **argv)
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{
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int bits = 16;
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int i;
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if (argv[1][0] == '-') switch (argv[1][1]) {
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case 'b': /* Number of bits per sample */
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if (argv[1][2] == '\0') {
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/* Separate numeric argument */
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if (argc < 3) { usage(); exit(1); }
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bits = atoi(argv[2]);
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argv += 2; argc -= 2;
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} else {
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/* Numeric argument attached to -b */
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bits = atoi(&argv[1][2]);
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argv++; argc--;
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}
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switch (bits) {
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case 8: case 16: case 24: case 32:
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break;
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default:
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fprintf(stderr, "The number of bits must be 8, 16, 24 or 32.\n");
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exit(1);
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}
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}
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for (i=1; i<argc; i++) {
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long val = atol(argv[i]);
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putchar(val & 0xFF);
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if (bits > 8) putchar((val >> 8) & 0xFF);
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if (bits > 16) putchar((val >> 16) & 0xFF);
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if (bits > 24) putchar((val >> 24) & 0xFF);
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}
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return 0;
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}
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