Added nioTSO's EA MicroTalk encoder to the project

library/tools/utkencode/utkdecode.c

@@ -0,0 +1,172 @@
+/*
+** utkdecode
+** Decode Maxis UTK to wav.
+** Authors: Andrew D'Addesio
+** License: Public domain
+** Compile: gcc -Wall -Wextra -Wno-unused-function -ansi -pedantic -O2 -ffast-math
+**          -fwhole-program -g0 -s -o utkdecode utkdecode.c
+*/
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include "utk.h"
+#include "io.h"
+
+#define MAKE_U32(a,b,c,d) ((a)|((b)<<8)|((c)<<16)|((d)<<24))
+#define ROUND(x) ((x) >= 0.0f ? ((x)+0.5f) : ((x)-0.5f))
+#define MIN(x,y) ((x)<(y)?(x):(y))
+#define MAX(x,y) ((x)>(y)?(x):(y))
+#define CLAMP(x,min,max) MIN(MAX(x,min),max)
+
+int main(int argc, char *argv[])
+{
+    const char *infile, *outfile;
+    UTKContext ctx;
+    uint32_t sID;
+    uint32_t dwOutSize;
+    uint32_t dwWfxSize;
+    uint16_t wFormatTag;
+    uint16_t nChannels;
+    uint32_t nSamplesPerSec;
+    uint32_t nAvgBytesPerSec;
+    uint16_t nBlockAlign;
+    uint16_t wBitsPerSample;
+    uint16_t cbSize;
+    uint32_t num_samples;
+    FILE *infp, *outfp;
+    int force = 0;
+    int error = 0;
+    int i;
+
+    /* Parse arguments. */
+    if (argc == 4 && !strcmp(argv[1], "-f")) {
+        force = 1;
+        argv++, argc--;
+    }
+
+    if (argc != 3) {
+        printf("Usage: utkdecode [-f] infile outfile\n");
+        printf("Decode Maxis UTK to wav.\n");
+        return EXIT_FAILURE;
+    }
+
+    infile = argv[1];
+    outfile = argv[2];
+
+    /* Open the input/output files. */
+    infp = fopen(infile, "rb");
+    if (!infp) {
+        fprintf(stderr, "error: failed to open '%s' for reading: %s\n", infile, strerror(errno));
+        return EXIT_FAILURE;
+    }
+
+    if (!force && fopen(outfile, "rb")) {
+        fprintf(stderr, "error: '%s' already exists\n", outfile);
+        return EXIT_FAILURE;
+    }
+
+    outfp = fopen(outfile, "wb");
+    if (!outfp) {
+        fprintf(stderr, "error: failed to create '%s': %s\n", outfile, strerror(errno));
+        return EXIT_FAILURE;
+    }
+
+    /* Parse the UTK header. */
+    sID = read_u32(infp);
+    dwOutSize = read_u32(infp);
+    dwWfxSize = read_u32(infp);
+    wFormatTag = read_u16(infp);
+    nChannels = read_u16(infp);
+    nSamplesPerSec = read_u32(infp);
+    nAvgBytesPerSec = read_u32(infp);
+    nBlockAlign = read_u16(infp);
+    wBitsPerSample = read_u16(infp);
+    cbSize = read_u16(infp);
+    read_u16(infp); /* padding */
+
+    if (sID != MAKE_U32('U','T','M','0')) {
+        fprintf(stderr, "error: not a valid UTK file (expected UTM0 signature)\n");
+        return EXIT_FAILURE;
+    } else if ((dwOutSize & 0x01) != 0 || dwOutSize >= 0x01000000) {
+        fprintf(stderr, "error: invalid dwOutSize %u\n", (unsigned)dwOutSize);
+        return EXIT_FAILURE;
+    } else if (dwWfxSize != 20) {
+        fprintf(stderr, "error: invalid dwWfxSize %u (expected 20)\n", (unsigned)dwWfxSize);
+        return EXIT_FAILURE;
+    } else if (wFormatTag != 1) {
+        fprintf(stderr, "error: invalid wFormatTag %u (expected 1)\n", (unsigned)wFormatTag);
+        return EXIT_FAILURE;
+    }
+
+    if (nChannels != 1) {
+        fprintf(stderr, "error: invalid nChannels %u (only mono is supported)\n", (unsigned)nChannels);
+        error = 1;
+    }
+    if (nSamplesPerSec < 8000 || nSamplesPerSec > 192000) {
+        fprintf(stderr, "error: invalid nSamplesPerSec %u\n", (unsigned)nSamplesPerSec);
+        error = 1;
+    }
+    if (nAvgBytesPerSec != nSamplesPerSec * nBlockAlign) {
+        fprintf(stderr, "error: invalid nAvgBytesPerSec %u (expected nSamplesPerSec * nBlockAlign)\n", (unsigned)nAvgBytesPerSec);
+        error = 1;
+    }
+    if (nBlockAlign != 2) {
+        fprintf(stderr, "error: invalid nBlockAlign %u (expected 2)\n", (unsigned)nBlockAlign);
+        error = 1;
+    }
+    if (wBitsPerSample != 16) {
+        fprintf(stderr, "error: invalid wBitsPerSample %u (expected 16)\n", (unsigned)wBitsPerSample);
+        error = 1;
+    }
+    if (cbSize != 0) {
+        fprintf(stderr, "error: invalid cbSize %u (expected 0)\n", (unsigned)cbSize);
+        error = 1;
+    }
+    if (error)
+        return EXIT_FAILURE;
+
+    num_samples = dwOutSize/2;
+
+    /* Write the WAV header. */
+    write_u32(outfp, MAKE_U32('R','I','F','F'));
+    write_u32(outfp, 36 + num_samples*2);
+    write_u32(outfp, MAKE_U32('W','A','V','E'));
+    write_u32(outfp, MAKE_U32('f','m','t',' '));
+    write_u32(outfp, 16);
+    write_u16(outfp, wFormatTag);
+    write_u16(outfp, nChannels);
+    write_u32(outfp, nSamplesPerSec);
+    write_u32(outfp, nAvgBytesPerSec);
+    write_u16(outfp, nBlockAlign);
+    write_u16(outfp, wBitsPerSample);
+    write_u32(outfp, MAKE_U32('d','a','t','a'));
+    write_u32(outfp, num_samples*2);
+
+    /* Decode. */
+    utk_init(&ctx);
+    utk_set_fp(&ctx, infp);
+
+    while (num_samples > 0) {
+        int count = MIN(num_samples, 432);
+
+        utk_decode_frame(&ctx);
+
+        for (i = 0; i < count; i++) {
+            int x = ROUND(ctx.decompressed_frame[i]);
+            write_u16(outfp, (int16_t)CLAMP(x, -32768, 32767));
+        }
+
+        num_samples -= count;
+    }
+
+    if (fclose(outfp) != 0) {
+        fprintf(stderr, "error: failed to close '%s': %s\n", outfile, strerror(errno));
+        return EXIT_FAILURE;
+    }
+
+    fclose(infp);
+
+    return EXIT_SUCCESS;
+}