sm64pc/tools/sdk-tools/adpcm/vadpcm_dec.c

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8.5 KiB
C
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2020-05-05 12:15:53 +00:00
#include <unistd.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <fcntl.h>
#include "vadpcm.h"
static void int_handler(s32 sig)
{
s32 flags;
flags = fcntl(STDIN_FILENO, F_GETFL, 0);
flags &= ~FNDELAY;
fcntl(STDIN_FILENO, F_SETFL, flags);
exit(0);
}
static char usage[] = "bitfile";
#ifdef __sgi
// Declaring a sigaction like this is wildly unportable; you're supposed to
// assign members one by one in code. We do that in the non-SGI case.
static struct sigaction int_act = {
/* sa_flags = */ SA_RESTART,
/* sa_handler = */ &int_handler,
/* sa_mask = */ 0,
};
#endif
s32 main(s32 argc, char **argv)
{
s32 c;
u8 cc;
u8 doloop = 0;
s16 order;
s16 version;
s16 nloops;
s16 npredictors;
s32 flags;
s32 ***coefTable = NULL;
s32 i;
s32 j;
s32 *outp;
s32 *state;
s32 done = 0;
s32 num;
u32 ts;
s32 soundPointer;
s32 cType;
s32 offset;
s32 currPos = 0;
s32 nSamples;
s32 framePos;
s32 loopBegin;
s32 left;
ALADPCMloop *aloops;
Chunk FormChunk;
ChunkHeader Header;
CommonChunk CommChunk;
SoundDataChunk SndDChunk;
char *ChunkName;
FILE *ifile;
char *progname = argv[0];
#ifndef __sgi
nloops = 0;
#endif
if (argc < 2)
{
fprintf(stderr, "%s %s\n", progname, usage);
exit(1);
}
while ((c = getopt(argc, argv, "l")) != -1)
{
switch (c)
{
case 'l':
doloop = 1;
break;
}
}
argv += optind - 1;
if ((ifile = fopen(argv[1], MODE_READ)) == NULL)
{
fprintf(stderr, "%s: bitstream file [%s] could not be opened\n", progname, argv[1]);
exit(1);
}
state = malloc(16 * sizeof(int));
for (i = 0; i < 16; i++)
{
state[i] = 0;
}
fread(&FormChunk, sizeof(FormChunk), 1, ifile);
BSWAP32(FormChunk.ckID)
BSWAP32(FormChunk.formType)
if ((FormChunk.ckID != 0x464f524d) || (FormChunk.formType != 0x41494643)) // FORM, AIFC
{
fprintf(stderr, "%s: [%s] is not an AIFF-C File\n", progname, argv[1]);
exit(1);
}
while (!done)
{
num = fread(&Header, sizeof(Header), 1, ifile);
if (num <= 0)
{
done = 1;
break;
}
BSWAP32(Header.ckID)
BSWAP32(Header.ckSize)
Header.ckSize++, Header.ckSize &= ~1;
switch (Header.ckID)
{
case 0x434f4d4d: // COMM
offset = ftell(ifile);
num = fread(&CommChunk, sizeof(CommChunk), 1, ifile);
if (num <= 0)
{
fprintf(stderr, "%s: error parsing file [%s]\n", progname, argv[1]);
done = 1;
}
BSWAP16(CommChunk.numChannels)
BSWAP16(CommChunk.numFramesH)
BSWAP16(CommChunk.numFramesL)
BSWAP16(CommChunk.sampleSize)
BSWAP16(CommChunk.compressionTypeH)
BSWAP16(CommChunk.compressionTypeL)
cType = (CommChunk.compressionTypeH << 16) + CommChunk.compressionTypeL;
if (cType != 0x56415043) // VAPC
{
fprintf(stderr, "%s: file [%s] is of the wrong compression type.\n", progname, argv[1]);
exit(1);
}
if (CommChunk.numChannels != 1)
{
fprintf(stderr, "%s: file [%s] contains %ld channels, only 1 channel supported.\n", progname, argv[1], (long) CommChunk.numChannels);
exit(1);
}
if (CommChunk.sampleSize != 16)
{
fprintf(stderr, "%s: file [%s] contains %ld bit samples, only 16 bit samples supported.\n", progname, argv[1], (long) CommChunk.sampleSize);
exit(1);
}
nSamples = (CommChunk.numFramesH << 16) + CommChunk.numFramesL;
fseek(ifile, offset + Header.ckSize, SEEK_SET);
break;
case 0x53534e44: // SSND
offset = ftell(ifile);
fread(&SndDChunk, sizeof(SndDChunk), 1, ifile);
BSWAP32(SndDChunk.offset)
BSWAP32(SndDChunk.blockSize)
// The assert error messages specify line numbers 165/166. Match
// that using a #line directive.
#ifdef __sgi
# line 164
#endif
assert(SndDChunk.offset == 0);
assert(SndDChunk.blockSize == 0);
soundPointer = ftell(ifile);
fseek(ifile, offset + Header.ckSize, SEEK_SET);
break;
case 0x4150504c: // APPL
offset = ftell(ifile);
fread(&ts, sizeof(u32), 1, ifile);
BSWAP32(ts)
if (ts == 0x73746f63) // stoc
{
ChunkName = ReadPString(ifile);
if (strcmp("VADPCMCODES", ChunkName) == 0)
{
fread(&version, sizeof(s16), 1, ifile);
BSWAP16(version)
if (version != 1)
{
fprintf(stderr, "Non-identical codebook chunk versions\n");
}
readaifccodebook(ifile, &coefTable, &order, &npredictors);
}
else if (strcmp("VADPCMLOOPS", ChunkName) == 0)
{
fread(&version, sizeof(s16), 1, ifile);
BSWAP16(version)
if (version != 1)
{
fprintf(stderr, "Non-identical loop chunk versions\n");
}
aloops = readlooppoints(ifile, &nloops);
}
}
fseek(ifile, offset + Header.ckSize, SEEK_SET);
break;
default:
// We don't understand this chunk. Skip it.
fseek(ifile, Header.ckSize, SEEK_CUR);
break;
}
}
if (coefTable == NULL)
{
// @bug should use progname; argv[0] may be an option
fprintf(stderr, "%s: Codebook missing from bitstream [%s]\n", argv[0], argv[1]);
exit(1);
}
outp = malloc(16 * sizeof(s32));
for (i = 0; i < order; i++)
{
outp[15 - i] = 0;
}
fseek(ifile, soundPointer, SEEK_SET);
if (doloop && nloops > 0)
{
#ifndef __sgi
struct sigaction int_act;
int_act.sa_flags = SA_RESTART;
int_act.sa_handler = int_handler;
sigemptyset(&int_act.sa_mask);
#endif
sigaction(SIGINT, &int_act, NULL);
flags = fcntl(STDIN_FILENO, F_GETFL, 0);
flags |= FNDELAY;
fcntl(STDIN_FILENO, F_SETFL, flags);
for (i = 0; i < nloops; i++)
{
while (currPos < aloops[i].end)
{
left = aloops[i].end - currPos;
vdecodeframe(ifile, outp, order, coefTable);
writeout(stdout, left < 16 ? left : 16, outp, outp, 1);
currPos += 16;
}
while (read(STDIN_FILENO, &cc, 1) == 0)
{
framePos = (aloops[i].start >> 4) + 1;
fseek(ifile, (framePos * 9) + soundPointer, SEEK_SET);
for (j = 0; j < 16; j++)
{
outp[j] = aloops[i].state[j];
}
loopBegin = aloops[i].start & 0xf;
writeout(stdout, 16 - loopBegin, outp + loopBegin, outp + loopBegin, 1);
currPos = framePos * 16;
while (currPos < aloops[i].end)
{
left = aloops[i].end - currPos;
vdecodeframe(ifile, outp, order, coefTable);
writeout(stdout, left < 16 ? left : 16, outp, outp, 1);
currPos += 16;
}
}
left = 16 - left;
if (left != 0)
{
writeout(stdout, left, &outp[left], &outp[left], 1);
}
while (currPos < nSamples)
{
vdecodeframe(ifile, outp, order, coefTable);
left = nSamples - currPos;
writeout(stdout, left < 16 ? left : 16, outp, outp, 1);
currPos += 16;
}
flags = fcntl(STDIN_FILENO, F_GETFL, 0);
flags &= ~FNDELAY;
fcntl(STDIN_FILENO, F_SETFL, flags);
}
}
else
{
while (currPos < nSamples)
{
vdecodeframe(ifile, outp, order, coefTable);
writeout(stdout, 16, outp, outp, 1);
currPos += 16;
}
}
fclose(ifile);
return 0;
}