📄 musicout.c
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/**********************************************************************
Copyright (c) 1991 MPEG/audio software simulation group, All Rights Reserved
musicout.c
**********************************************************************/
/**********************************************************************
* MPEG/audio coding/decoding software, work in progress *
* NOT for public distribution until verified and approved by the *
* MPEG/audio committee. For further information, please contact *
* Davis Pan, 708-538-5671, e-mail: pan@ukraine.corp.mot.com *
* *
* VERSION 4.3 *
* changes made since last update: *
* date programmers comment *
* 2/25/91 Douglas Wong start of version 1.0 records *
* 3/06/91 Douglas Wong rename setup.h to dedef.h *
* removed extraneous variables *
* removed window_samples (now part of *
* filter_samples) *
* 3/07/91 Davis Pan changed output file to "codmusic" *
* 5/10/91 Vish (PRISM) Ported to Macintosh and Unix. *
* Incorporated new "out_fifo()" which *
* writes out last incomplete buffer. *
* Incorporated all AIFF routines which *
* are also compatible with SUN. *
* Incorporated user interface for *
* specifying sound file names. *
* Also incorporated user interface for *
* writing AIFF compatible sound files. *
* 27jun91 dpwe (Aware) Added musicout and &sample_frames as *
* args to out_fifo (were glob refs). *
* Used new 'frame_params' struct. *
* Clean,simplify, track clipped output *
* and total bits/frame received. *
* 7/10/91 Earle Jennings changed to floats to FLOAT *
*10/ 1/91 S.I. Sudharsanan, Ported to IBM AIX platform. *
* Don H. Lee, *
* Peter W. Farrett *
*10/ 3/91 Don H. Lee implemented CRC-16 error protection *
* newly introduced functions are *
* buffer_CRC and recover_CRC_error *
* Additions and revisions are marked *
* with "dhl" for clarity *
* 2/11/92 W. Joseph Carter Ported new code to Macintosh. Most *
* important fixes involved changing *
* 16-bit ints to long or unsigned in *
* bit alloc routines for quant of 65535 *
* and passing proper function args. *
* Removed "Other Joint Stereo" option *
* and made bitrate be total channel *
* bitrate, irrespective of the mode. *
* Fixed many small bugs & reorganized. *
*19 aug 92 Soren H. Nielsen Changed MS-DOS file name extensions. *
* 8/27/93 Seymour Shlien, Fixes in Unix and MSDOS ports, *
* Daniel Lauzon, and *
* Bill Truerniet *
*--------------------------------------------------------------------*
* 4/23/92 J. Pineda Added code for layer III. LayerIII *
* Amit Gulati decoding is currently performed in *
* two-passes for ease of sideinfo and *
* maindata buffering and decoding. *
* The second (computation) pass is *
* activated with "decode -3 <outfile>" *
* 10/25/92 Amit Gulati Modified usage() for layerIII *
* 12/10/92 Amit Gulati Changed processing order of re-order- *
* -ing step. Fixed adjustment of *
* main_data_end pointer to exclude *
* side information. *
* 9/07/93 Toshiyuki Ishino Integrated Layer III with Ver 3.9. *
*--------------------------------------------------------------------*
* 11/20/93 Masahiro Iwadare Integrated Layer III with Ver 4.0. *
*--------------------------------------------------------------------*
* 7/14/94 Juergen Koller Bug fixes in Layer III code *
*--------------------------------------------------------------------*
* 08/11/94 IIS Bug fixes in Layer III code *
*--------------------------------------------------------------------*
* 11/04/94 Jon Rowlands Prototype fixes *
**********************************************************************/
#include "common.h"
#include "decoder.h"
/********************************************************************
/*
/* This part contains the MPEG I decoder for Layers I & II.
/*
/*********************************************************************/
/****************************************************************
/*
/* For MS-DOS user (Turbo c) change all instance of malloc
/* to _farmalloc and free to _farfree. Compiler model hugh
/* Also make sure all the pointer specified are changed to far.
/*
/*****************************************************************/
/*********************************************************************
/*
/* Core of the Layer II decoder. Default layer is Layer II.
/*
/*********************************************************************/
/* Global variable definitions for "musicout.c" */
char *programName;
int main_data_slots();
int side_info_slots();
/* Implementations */
main(argc, argv)
int argc;
char **argv;
{
/*typedef short PCM[2][3][SBLIMIT];*/
typedef short PCM[2][SSLIMIT][SBLIMIT];
PCM FAR *pcm_sample;
typedef unsigned int SAM[2][3][SBLIMIT];
SAM FAR *sample;
typedef double FRA[2][3][SBLIMIT];
FRA FAR *fraction;
typedef double VE[2][HAN_SIZE];
VE FAR *w;
Bit_stream_struc bs;
frame_params fr_ps;
layer info;
FILE *musicout;
unsigned long sample_frames;
int i, j, k, x, stereo, done=FALSE, clip, sync;
int error_protection, crc_error_count, total_error_count;
unsigned int old_crc, new_crc;
unsigned int bit_alloc[2][SBLIMIT], scfsi[2][SBLIMIT],
scale_index[2][3][SBLIMIT];
unsigned long bitsPerSlot, samplesPerFrame, frameNum = 0;
unsigned long frameBits, gotBits = 0;
IFF_AIFF pcm_aiff_data;
char encoded_file_name[MAX_NAME_SIZE];
char decoded_file_name[MAX_NAME_SIZE];
char default_file_name[MAX_NAME_SIZE];
char t[50];
int need_aiff;
int need_esps; /* MI */
int topSb = 0;
III_scalefac_t III_scalefac;
III_side_info_t III_side_info;
#ifdef MACINTOSH
console_options.nrows = MAC_WINDOW_SIZE;
argc = ccommand(&argv);
#endif
/* Most large variables are declared dynamically to ensure
compatibility with smaller machines */
pcm_sample = (PCM FAR *) mem_alloc((long) sizeof(PCM), "PCM Samp");
sample = (SAM FAR *) mem_alloc((long) sizeof(SAM), "Sample");
fraction = (FRA FAR *) mem_alloc((long) sizeof(FRA), "fraction");
w = (VE FAR *) mem_alloc((long) sizeof(VE), "w");
fr_ps.header = &info;
fr_ps.tab_num = -1; /* no table loaded */
fr_ps.alloc = NULL;
for (i=0;i<HAN_SIZE;i++) for (j=0;j<2;j++) (*w)[j][i] = 0.0;
programName = argv[0];
if(argc==1) { /* no command line args -> interact */
do {
printf ("Enter encoded file name <required>: ");
gets (encoded_file_name);
if (encoded_file_name[0] == NULL_CHAR)
printf ("Encoded file name is required. \n");
} while (encoded_file_name[0] == NULL_CHAR);
printf (">>> Encoded file name is: %s \n", encoded_file_name);
x=0;
while (x <= MAX_NAME_SIZE)
{
default_file_name[x] = NULL_CHAR;
++x;
}
x=0;
while (x <= 8)
{
default_file_name[x] = encoded_file_name[x];
if (encoded_file_name[++x] == '.')
x = 9;
}
strcat(default_file_name,DFLT_OPEXT);
printf("Enter MPEG decoded output file name <%s>: ",
default_file_name); /* 92-08-19 shn */
gets(decoded_file_name);
if (decoded_file_name[0] == NULL_CHAR) {
/* replace old extension with new one, 92-08-19 shn */
strcpy(decoded_file_name,default_file_name);
}
printf (">>> MPEG decoded file name is: %s \n", decoded_file_name);
printf(
"Do you wish to write an AIFF compatible sound file ? (y/<n>) : ");
gets(t);
if (*t == 'y' || *t == 'Y') need_aiff = TRUE;
else need_aiff = FALSE;
if (need_aiff)
printf(">>> An AIFF compatible sound file will be written\n");
else printf(">>> A non-headered PCM sound file will be written\n");
printf(
"Do you wish to exit (last chance before decoding) ? (y/<n>) : ");
gets(t);
if (*t == 'y' || *t == 'Y') exit(0);
}
else { /* interpret CL Args */
int i=0, err=0;
need_aiff = FALSE;
need_esps = FALSE; /* MI */
encoded_file_name[0] = '\0';
decoded_file_name[0] = '\0';
while(++i<argc && err == 0) {
char c, *token, *arg, *nextArg;
int argUsed;
token = argv[i];
if(*token++ == '-') {
if(i+1 < argc) nextArg = argv[i+1];
else nextArg = "";
argUsed = 0;
while(c = *token++) {
if(*token /* NumericQ(token) */) arg = token;
else arg = nextArg;
switch(c) {
case 's': topSb = atoi(arg); argUsed = 1;
if(topSb<1 || topSb>SBLIMIT) {
fprintf(stderr, "%s: -s band %s not %d..%d\n",
programName, arg, 1, SBLIMIT);
err = 1;
}
break;
case 'A': need_aiff = TRUE; break;
case 'E': need_esps = TRUE; break; /* MI */
default: fprintf(stderr,"%s: unrecognized option %c\n",
programName, c);
err = 1; break;
}
if(argUsed) {
if(arg == token) token = ""; /* no more from token */
else ++i; /* skip arg we used */
arg = ""; argUsed = 0;
}
}
}
else {
if(encoded_file_name[0] == '\0')
strcpy(encoded_file_name, argv[i]);
else
if(decoded_file_name[0] == '\0')
strcpy(decoded_file_name, argv[i]);
else {
fprintf(stderr,
"%s: excess arg %s\n", programName, argv[i]);
err = 1;
}
}
}
if(err || encoded_file_name[0] == '\0') usage(); /* never returns */
if(decoded_file_name[0] == '\0') {
strcpy(decoded_file_name, encoded_file_name);
strcat(decoded_file_name, DFLT_OPEXT);
}
}
/* report results of dialog / command line */
printf("Input file = '%s' output file = '%s'\n",
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