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- /**********************************************************************
- Copyright (c) 1991 MPEG/audio software simulation group, All Rights Reserved
- musicin.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, 508-493-2241, e-mail: pan@3d.enet.dec.com *
- * *
- * VERSION 4.0 *
- * changes made since last update: *
- * date programmers comment *
- * 3/01/91 Douglas Wong, start of version 1.1 records *
- * Davis Pan *
- * 3/06/91 Douglas Wong, rename: setup.h to endef.h *
- * removed extraneous variables *
- * 3/21/91 J.Georges Fritsch introduction of the bit-stream *
- * package. This package allows you *
- * to generate the bit-stream in a *
- * binary or ascii format *
- * 3/31/91 Bill Aspromonte replaced the read of the SB matrix *
- * by an "code generated" one *
- * 5/10/91 W. Joseph Carter Ported to Macintosh and Unix. *
- * Incorporated Jean-Georges Fritsch's *
- * "bitstream.c" package. *
- * Modified to strictly adhere to *
- * encoded bitstream specs, including *
- * "Berlin changes". *
- * Modified user interface dialog & code *
- * to accept any input & output *
- * filenames desired. Also added *
- * de-emphasis prompt and final bail-out *
- * opportunity before encoding. *
- * Added AIFF PCM sound file reading *
- * capability. *
- * Modified PCM sound file handling to *
- * process all incoming samples and fill *
- * out last encoded frame with zeros *
- * (silence) if needed. *
- * Located and fixed numerous software *
- * bugs and table data errors. *
- * 27jun91 dpwe (Aware Inc) Used new frame_params struct. *
- * Clear all automatic arrays. *
- * Changed some variable names, *
- * simplified some code. *
- * Track number of bits actually sent. *
- * Fixed padding slot, stereo bitrate *
- * Added joint-stereo : scales L+R. *
- * 6/12/91 Earle Jennings added fix for MS_DOS in obtain_param *
- * 6/13/91 Earle Jennings added stack length adjustment before *
- * main for MS_DOS *
- * 7/10/91 Earle Jennings conversion of all float to FLOAT *
- * port to MsDos from MacIntosh completed*
- * 8/ 8/91 Jens Spille Change for MS-C6.00 *
- * 8/22/91 Jens Spille new obtain_parameters() *
- *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 *
- * I_CRC_calc, II_CRC_calc and encode_CRC*
- * Additions and revisions are marked *
- * with "dhl" for clarity *
- *11/11/91 Katherine Wang Documentation of code. *
- * (variables in documentation are *
- * surround by the # symbol, and an '*'*
- * denotes layer I or II versions) *
- * 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. *
- * 2/25/92 Masahiro Iwadare made code cleaner and more consistent *
- * 8/07/92 Mike Coleman make exit() codes return error status *
- * made slight changes for portability *
- *19 aug 92 Soren H. Nielsen Changed MS-DOS file name extensions. *
- * 8/25/92 Shaun Astarabadi Replaced rint() function with explicit*
- * rounding for portability with MSDOS. *
- * 9/22/92 jddevine@aware.com Fixed _scale_factor_calc() calls. *
- *10/19/92 Masahiro Iwadare added info->mode and info->mode_ext *
- * updates for AIFF format files *
- * 3/10/93 Kevin Peterson In parse_args, only set non default *
- * bit rate if specified in arg list. *
- * Use return value from aiff_read_hdrs *
- * to fseek to start of sound data *
- * 7/26/93 Davis Pan fixed bug in printing info->mode_ext *
- * value for joint stereo condition *
- * 8/27/93 Seymour Shlien, Fixes in Unix and MSDOS ports, *
- * Daniel Lauzon, and *
- * Bill Truerniet *
- **********************************************************************/
-
-
- #include <dos.h>
- #include "common.h"
- #include "encoder.h"
-
- /* Global variable definitions for "musicin.c" */
-
- FILE *musicin;
- Bit_stream_struc bs;
- char *programName;
-
- /* Implementations */
-
- /************************************************************************
- /*
- /* obtain_parameters
- /*
- /* PURPOSE: Prompts for and reads user input for encoding parameters
- /*
- /* SEMANTICS: The parameters read are:
- /* - input and output filenames
- /* - sampling frequency (if AIFF file, will read from the AIFF file header)
- /* - layer number
- /* - mode (stereo, joint stereo, dual channel or mono)
- /* - psychoacoustic model (I or II)
- /* - total bitrate, irrespective of the mode
- /* - de-emphasis, error protection, copyright and original or copy flags
- /*
- /************************************************************************/
-
- void
- obtain_parameters(fr_ps,psy,num_samples,original_file_name,encoded_file_name)
- frame_params *fr_ps;
- int *psy;
- unsigned long *num_samples;
- char original_file_name[MAX_NAME_SIZE];
- char encoded_file_name[MAX_NAME_SIZE];
-
- {
- int j;
- int x;
- char default_file_name[MAX_NAME_SIZE];
- long int freq;
- int model, brt;
- char t[50];
- IFF_AIFF pcm_aiff_data;
- layer *info = fr_ps->header;
- long soundPosition;
-
- do {
- printf("Enter PCM input file name <required>: ");
- gets(original_file_name);
- if (original_file_name[0] == NULL_CHAR)
- printf("PCM input file name is required.\n");
- } while (original_file_name[0] == NULL_CHAR);
- printf(">>> PCM input file name is: %s\n", original_file_name);
-
- if ((musicin = fopen(original_file_name, "rb")) == NULL) {
- printf("Could not find \"%s\".\n", original_file_name);
- exit(1);
- }
- x=0;
- while (x <= MAX_NAME_SIZE)
- {
- default_file_name[x] = NULL_CHAR;
- ++x;
- }
- x=0;
- while (x <= 8)
- {
- default_file_name[x] = original_file_name[x];
- if (original_file_name[++x] == '.')
- x = 9;
-
- }
-
- strcat(default_file_name,DFLT_EXT);
-
- printf("Enter MPEG encoded output file name <%s>: ",
- default_file_name); /* 92-08-19 shn */
- gets(encoded_file_name);
- if (encoded_file_name[0] == NULL_CHAR) {
-
- /* replace old extension with new one, 92-08-19 shn */
- strcpy(encoded_file_name,default_file_name);
- /*
- strcat(strcpy(encoded_file_name, original_file_name), DFLT_EXT);
- */
- }
-
-
- printf(">>> MPEG encoded output file name is: %s\n", encoded_file_name);
-
- open_bit_stream_w(&bs, encoded_file_name, BUFFER_SIZE);
-
- if ((soundPosition = aiff_read_headers(musicin, &pcm_aiff_data)) != -1) {
-
- printf(">>> Using Audio IFF sound file headers\n");
-
- aiff_check(original_file_name, &pcm_aiff_data);
-
- if (fseek(musicin, soundPosition, SEEK_SET) != 0) {
- printf("Could not seek to PCM sound data in \"%s\".\n",
- original_file_name);
- exit(1);
- }
-
- info->sampling_frequency = SmpFrqIndex((long)pcm_aiff_data.sampleRate);
- printf(">>> %.f Hz sampling frequency selected\n",
- pcm_aiff_data.sampleRate);
-
- /* Determine number of samples in sound file */
- #ifndef MS_DOS
- *num_samples = pcm_aiff_data.numChannels *
- pcm_aiff_data.numSampleFrames;
- #else
- *num_samples = (long)(pcm_aiff_data.numChannels) *
- (long)(pcm_aiff_data.numSampleFrames);
- #endif
-
- }
- else { /* Not using Audio IFF sound file headers. */
-
- printf("What is the sampling frequency? <44100>[Hz]: ");
- gets(t);
- freq = atol(t);
- switch (freq) {
- case 48000 : info->sampling_frequency = 1;
- printf(">>> %ld Hz sampling freq selected\n", freq);
- break;
- case 44100 : info->sampling_frequency = 0;
- printf(">>> %ld Hz sampling freq selected\n", freq);
- break;
- case 32000 : info->sampling_frequency = 2;
- printf(">>> %ld Hz sampling freq selected\n", freq);
- break;
- default: info->sampling_frequency = 0;
- printf(">>> Default 44.1 kHz samp freq selected\n");
- }
-
- if (fseek(musicin, 0, SEEK_SET) != 0) {
- printf("Could not seek to PCM sound data in \"%s\".\n",
- original_file_name);
- exit(1);
- }
-
- /* Declare sound file to have "infinite" number of samples. */
- *num_samples = MAX_U_32_NUM;
-
- }
-
- printf("Which layer do you want to use?\n");
- printf("Available: Layer (1), Layer (<2>): ");
- gets(t);
- switch(*t){
- case '1': info->lay = 1; printf(">>> Using Layer %s\n",t); break;
- case '2': info->lay = 2; printf(">>> Using Layer %s\n",t); break;
- default: info->lay = 2; printf(">>> Using default Layer 2\n"); break;
- }
-
- printf("Which mode do you want?\n");
- printf("Available: (<s>)tereo, (j)oint stereo, ");
- printf("(d)ual channel, s(i)ngle Channel: ");
- gets(t);
- switch(*t){
- case 's':
- case 'S':
- info->mode = MPG_MD_STEREO; info->mode_ext = 0;
- printf(">>> Using mode %s\n",t);
- break;
- case 'j':
- case 'J':
- info->mode = MPG_MD_JOINT_STEREO;
- printf(">>> Using mode %s\n",t);
- break;
- case 'd':
- case 'D':
- info->mode = MPG_MD_DUAL_CHANNEL; info->mode_ext = 0;
- printf(">>> Using mode %s\n",t);
- break;
- case 'i':
- case 'I':
- info->mode = MPG_MD_MONO; info->mode_ext = 0;
- printf(">>> Using mode %s\n",t);
- break;
- default:
- info->mode = MPG_MD_STEREO; info->mode_ext = 0;
- printf(">>> Using default stereo mode\n");
- break;
- }
-
- printf("Which psychoacoustic model do you want to use? <2>: ");
- gets(t);
- model = atoi(t);
- if (model > 2 || model < 1) {
- printf(">>> Default model 2 selected\n");
- *psy = 2;
- }
- else {
- *psy = model;
- printf(">>> Using psychoacoustic model %d\n", model);
- }
-
- printf("What is the total bitrate? <%u>[kbps]: ", DFLT_BRT);
- gets(t);
- brt = atoi(t);
- if (brt == 0) brt = -10;
- j=0;
- while (j<15) {
- if (bitrate[info->lay-1][j] == brt) break;
- j++;
- }
- if (j==15) {
- printf(">>> Using default %u kbps\n", DFLT_BRT);
- for (j=0;j<15;j++)
- if (bitrate[info->lay-1][j] == DFLT_BRT) {
- info->bitrate_index = j;
- break;
- }
- }
- else{
- info->bitrate_index = j;
- printf(">>> Bitrate = %d kbps\n", bitrate[info->lay-1][j]);
- }
-
- printf("What type of de-emphasis should the decoder use?\n");
- printf("Available: (<n>)one, (5)0/15 microseconds, (c)citt j.17: ");
- gets(t);
- if (*t != 'n' && *t != '5' && *t != 'c') {
- printf(">>> Using default no de-emphasis\n");
- info->emphasis = 0;
- }
- else {
- if (*t == 'n') info->emphasis = 0;
- else if (*t == '5') info->emphasis = 1;
- else if (*t == 'c') info->emphasis = 3;
- printf(">>> Using de-emphasis %s\n",t);
- }
-
- /* Start 2. Part changes for CD Ver 3.2; jsp; 22-Aug-1991 */
-
- printf("Do you want to set the private bit? (y/<n>): ");
- gets(t);
- if (*t == 'y' || *t == 'Y') info->extension = 1;
- else info->extension = 0;
- if(info->extension) printf(">>> Private bit set\n");
- else printf(">>> Private bit not set\n");
-
- /* End changes for CD Ver 3.2; jsp; 22-Aug-1991 */
-
- printf("Do you want error protection? (y/<n>): ");
- gets(t);
- if (*t == 'y' || *t == 'Y') info->error_protection = TRUE;
- else info->error_protection = FALSE;
- if(info->error_protection) printf(">>> Error protection used\n");
- else printf(">>> Error protection not used\n");
-
- printf("Is the material copyrighted? (y/<n>): ");
- gets(t);
- if (*t == 'y' || *t == 'Y') info->copyright = 1;
- else info->copyright = 0;
- if(info->copyright) printf(">>> Copyrighted material\n");
- else printf(">>> Material not copyrighted\n");
-
- printf("Is this the original? (y/<n>): ");
- gets(t);
- if (*t == 'y' || *t == 'Y') info->original = 1;
- else info->original = 0;
- if(info->original) printf(">>> Original material\n");
- else printf(">>> Material not original\n");
-
- printf("Do you wish to exit (last chance before encoding)? (y/<n>): ");
- gets(t);
- if (*t == 'y' || *t == 'Y') exit(0);
- }
-
- /************************************************************************
- /*
- /* parse_args
- /*
- /* PURPOSE: Sets encoding parameters to the specifications of the
- /* command line. Default settings are used for parameters
- /* not specified in the command line.
- /*
- /* SEMANTICS: The command line is parsed according to the following
- /* syntax:
- /*
- /* -l is followed by the layer number
- /* -m is followed by the mode
- /* -p is followed by the psychoacoustic model number
- /* -s is followed by the sampling rate
- /* -b is followed by the total bitrate, irrespective of the mode
- /* -d is followed by the emphasis flag
- /* -c is followed by the copyright/no_copyright flag
- /* -o is followed by the original/not_original flag
- /* -e is followed by the error_protection on/off flag
- /*
- /* If the input file is in AIFF format, the sampling frequency is read
- /* from the AIFF header.
- /*
- /* The input and output filenames are read into #inpath# and #outpath#.
- /*
- /************************************************************************/
-
- void
- parse_args(argc, argv, fr_ps, psy, num_samples, inPath, outPath)
- int argc;
- char **argv;
- frame_params *fr_ps;
- int *psy;
- unsigned long *num_samples;
- char inPath[MAX_NAME_SIZE];
- char outPath[MAX_NAME_SIZE];
- {
- FLOAT srate;
- int brate;
- layer *info = fr_ps->header;
- int err = 0, i = 0;
- IFF_AIFF pcm_aiff_data;
- long samplerate;
- long soundPosition;
-
- /* preset defaults */
- inPath[0] = '\0'; outPath[0] = '\0';
- info->lay = DFLT_LAY;
- switch(DFLT_MOD) {
- case 's': info->mode = MPG_MD_STEREO; info->mode_ext = 0; break;
- case 'd': info->mode = MPG_MD_DUAL_CHANNEL; info->mode_ext=0; break;
- case 'j': info->mode = MPG_MD_JOINT_STEREO; break;
- case 'm': info->mode = MPG_MD_MONO; info->mode_ext = 0; break;
- default:
- fprintf(stderr, "%s: Bad mode dflt %c\n", programName, DFLT_MOD);
- abort();
- }
- *psy = DFLT_PSY;
- if((info->sampling_frequency = SmpFrqIndex((long)(1000*DFLT_SFQ))) < 0) {
- fprintf(stderr, "%s: bad sfrq default %.2f\n", programName, DFLT_SFQ);
- abort();
- }
- if((info->bitrate_index = BitrateIndex(info->lay, DFLT_BRT)) < 0) {
- fprintf(stderr, "%s: bad default bitrate %u\n", programName, DFLT_BRT);
- abort();
- }
- switch(DFLT_EMP) {
- case 'n': info->emphasis = 0; break;
- case '5': info->emphasis = 1; break;
- case 'c': info->emphasis = 3; break;
- default:
- fprintf(stderr, "%s: Bad emph dflt %c\n", programName, DFLT_EMP);
- abort();
- }
- info->copyright = 0; info->original = 0; info->error_protection = FALSE;
-
- /* process args */
- 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 'l': info->lay = atoi(arg); argUsed = 1;
- if(info->lay<1 || info->lay>2) {
- fprintf(stderr,"%s: -l layer must be 1 or 2, not %s\n",
- programName, arg);
- err = 1;
- }
- break;
- case 'm': argUsed = 1;
- if (*arg == 's')
- { info->mode = MPG_MD_STEREO; info->mode_ext = 0; }
- else if (*arg == 'd')
- { info->mode = MPG_MD_DUAL_CHANNEL; info->mode_ext=0; }
- else if (*arg == 'j')
- { info->mode = MPG_MD_JOINT_STEREO; }
- else if (*arg == 'm')
- { info->mode = MPG_MD_MONO; info->mode_ext = 0; }
- else {
- fprintf(stderr,"%s: -m mode must be s/d/j/m not %s\n",
- programName, arg);
- err = 1;
- }
- break;
- case 'p': *psy = atoi(arg); argUsed = 1;
- if(*psy<1 || *psy>2) {
- fprintf(stderr,"%s: -p model must be 1 or 2, not %s\n",
- programName, arg);
- err = 1;
- }
- break;
-
- case 's':
- argUsed = 1;
- srate = atof( arg );
- /* samplerate = rint( 1000.0 * srate ); $A */
- samplerate = (long) (( 1000.0 * srate ) + 0.5);
- if( (info->sampling_frequency = SmpFrqIndex((long) samplerate)) < 0 )
- err = 1;
- break;
-
- case 'b':
- argUsed = 1;
- brate = atoi(arg);
- if( (info->bitrate_index = BitrateIndex(info->lay, brate)) < 0)
- err=1;
- break;
- case 'd': argUsed = 1;
- if (*arg == 'n') info->emphasis = 0;
- else if (*arg == '5') info->emphasis = 1;
- else if (*arg == 'c') info->emphasis = 3;
- else {
- fprintf(stderr,"%s: -d emp must be n/5/c not %s\n",
- programName, arg);
- err = 1;
- }
- break;
- case 'c': info->copyright = 1; break;
- case 'o': info->original = 1; break;
- case 'e': info->error_protection = TRUE; break;
- default: fprintf(stderr,"%s: unrec 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(inPath[0] == '\0') strcpy(inPath, argv[i]);
- else if(outPath[0] == '\0') strcpy(outPath, argv[i]);
- else {
- fprintf(stderr,"%s: excess arg %s\n", programName, argv[i]);
- err = 1;
- }
- }
- }
-
- if(err || inPath[0] == '\0') usage(); /* never returns */
-
- if(outPath[0] == '\0') {
- strcpy(outPath, inPath);
- strcat(outPath, DFLT_EXT);
- }
-
- if ((musicin = fopen(inPath, "rb")) == NULL) {
- printf("Could not find \"%s\".\n", inPath);
- exit(1);
- }
-
- open_bit_stream_w(&bs, outPath, BUFFER_SIZE);
-
- if ((soundPosition = aiff_read_headers(musicin, &pcm_aiff_data)) != -1) {
-
- printf(">>> Using Audio IFF sound file headers\n");
-
- aiff_check(inPath, &pcm_aiff_data);
-
- if (fseek(musicin, soundPosition, SEEK_SET) != 0) {
- printf("Could not seek to PCM sound data in \"%s\".\n", inPath);
- exit(1);
- }
-
- info->sampling_frequency = SmpFrqIndex((long)pcm_aiff_data.sampleRate);
- printf(">>> %.f Hz sampling frequency selected\n",
- pcm_aiff_data.sampleRate);
-
- /* Determine number of samples in sound file */
- #ifndef MS_DOS
- *num_samples = pcm_aiff_data.numChannels *
- pcm_aiff_data.numSampleFrames;
- #else
- *num_samples = (long)(pcm_aiff_data.numChannels) *
- (long)(pcm_aiff_data.numSampleFrames);
- #endif
- if ( pcm_aiff_data.numChannels == 1 ) {
- info->mode = MPG_MD_MONO;
- info->mode_ext = 0;
- }
- }
- else { /* Not using Audio IFF sound file headers. */
-
- if (fseek(musicin, 0, SEEK_SET) != 0) {
- printf("Could not seek to PCM sound data in \"%s\".\n", inPath);
- exit(1);
- }
-
- /* Declare sound file to have "infinite" number of samples. */
- *num_samples = MAX_U_32_NUM;
-
- }
-
- }
-
- /************************************************************************
- /*
- /* print_config
- /*
- /* PURPOSE: Prints the encoding parameters used
- /*
- /************************************************************************/
-
- void
- print_config(fr_ps, psy, num_samples, inPath, outPath)
- frame_params *fr_ps;
- int *psy;
- unsigned long *num_samples;
- char inPath[MAX_NAME_SIZE];
- char outPath[MAX_NAME_SIZE];
- {
- layer *info = fr_ps->header;
-
- printf("Encoding configuration:\n");
- if(info->mode != MPG_MD_JOINT_STEREO)
- printf("Layer=%s mode=%s extn=%d psy model=%d\n",
- layer_names[info->lay-1], mode_names[info->mode],
- info->mode_ext, *psy);
- else printf("Layer=%s mode=%s extn=data dependant psy model=%d\n",
- layer_names[info->lay-1], mode_names[info->mode], *psy);
- printf("samp frq=%.1f kHz total bitrate=%d kbps\n",
- s_freq[info->sampling_frequency],
- bitrate[info->lay-1][info->bitrate_index]);
- printf("de-emph=%d c/right=%d orig=%d errprot=%d\n",
- info->emphasis, info->copyright, info->original,
- info->error_protection);
- printf("input file: '%s' output file: '%s'\n", inPath, outPath);
- }
-
- /************************************************************************
- /*
- /* main
- /*
- /* PURPOSE: MPEG I Encoder supporting layers 1 and 2, and
- /* psychoacoustic models 1 (MUSICAM) and 2 (AT&T)
- /*
- /* SEMANTICS: One overlapping frame of audio of up to 2 channels are
- /* processed at a time in the following order:
- /* (associated routines are in parentheses)
- /*
- /* 1. Filter sliding window of data to get 32 subband
- /* samples per channel.
- /* (window_subband,filter_subband)
- /*
- /* 2. If joint stereo mode, combine left and right channels
- /* for subbands above #jsbound#.
- /* (*_combine_LR)
- /*
- /* 3. Calculate scalefactors for the frame, and if layer 2,
- /* also calculate scalefactor select information.
- /* (*_scale_factor_calc)
- /*
- /* 4. Calculate psychoacoustic masking levels using selected
- /* psychoacoustic model.
- /* (*_Psycho_One, psycho_anal)
- /*
- /* 5. Perform iterative bit allocation for subbands with low
- /* mask_to_noise ratios using masking levels from step 4.
- /* (*_main_bit_allocation)
- /*
- /* 6. If error protection flag is active, add redundancy for
- /* error protection.
- /* (*_CRC_calc)
- /*
- /* 7. Pack bit allocation, scalefactors, and scalefactor select
- /* information (layer 2) onto bitstream.
- /* (*_encode_bit_alloc,*_encode_scale,II_transmission_pattern)
- /*
- /* 8. Quantize subbands and pack them into bitstream
- /* (*_subband_quantization, *_sample_encoding)
- /*
- /************************************************************************/
-
- main(argc, argv)
- int argc;
- char **argv;
- {
- typedef double SBS[2][3][SCALE_BLOCK][SBLIMIT];
- SBS FAR *sb_sample;
- typedef double JSBS[3][SCALE_BLOCK][SBLIMIT];
- JSBS FAR *j_sample;
- typedef double IN[2][HAN_SIZE];
- IN FAR *win_que;
- typedef unsigned int SUB[2][3][SCALE_BLOCK][SBLIMIT];
- SUB FAR *subband;
-
- frame_params fr_ps;
- layer info;
- char original_file_name[MAX_NAME_SIZE];
- char encoded_file_name[MAX_NAME_SIZE];
- short FAR **win_buf;
- static short FAR buffer[2][1152];
- static unsigned int bit_alloc[2][SBLIMIT], scfsi[2][SBLIMIT];
- static unsigned int scalar[2][3][SBLIMIT], j_scale[3][SBLIMIT];
- static double FAR ltmin[2][SBLIMIT], lgmin[2][SBLIMIT], max_sc[2][SBLIMIT];
- FLOAT snr32[32];
- short sam[2][1056];
- int whole_SpF, extra_slot = 0;
- double avg_slots_per_frame, frac_SpF, slot_lag;
- int model, stereo, error_protection;
- static unsigned int crc;
- int i, j, k, adb;
- unsigned long bitsPerSlot, samplesPerFrame, frameNum = 0;
- unsigned long frameBits, sentBits = 0;
- unsigned long num_samples;
-
- #ifdef MACINTOSH
- console_options.nrows = MAC_WINDOW_SIZE;
- argc = ccommand(&argv);
- #endif
-
- /* Most large variables are declared dynamically to ensure
- compatibility with smaller machines */
-
- sb_sample = (SBS FAR *) mem_alloc(sizeof(SBS), "sb_sample");
- j_sample = (JSBS FAR *) mem_alloc(sizeof(JSBS), "j_sample");
- win_que = (IN FAR *) mem_alloc(sizeof(IN), "Win_que");
- subband = (SUB FAR *) mem_alloc(sizeof(SUB),"subband");
- win_buf = (short FAR **) mem_alloc(sizeof(short *)*2, "win_buf");
-
- /* clear buffers */
- memset((char *) buffer, 0, sizeof(buffer));
- memset((char *) bit_alloc, 0, sizeof(bit_alloc));
- memset((char *) scalar, 0, sizeof(scalar));
- memset((char *) j_scale, 0, sizeof(j_scale));
- memset((char *) scfsi, 0, sizeof(scfsi));
- memset((char *) ltmin, 0, sizeof(ltmin));
- memset((char *) lgmin, 0, sizeof(lgmin));
- memset((char *) max_sc, 0, sizeof(max_sc));
- memset((char *) snr32, 0, sizeof(snr32));
- memset((char *) sam, 0, sizeof(sam));
-
- fr_ps.header = &info;
- fr_ps.tab_num = -1; /* no table loaded */
- fr_ps.alloc = NULL;
- info.version = MPEG_AUDIO_ID;
-
- programName = argv[0];
- if(argc==1) /* no command-line args */
- obtain_parameters(&fr_ps, &model, &num_samples,
- original_file_name, encoded_file_name);
- else
- parse_args(argc, argv, &fr_ps, &model, &num_samples,
- original_file_name, encoded_file_name);
- print_config(&fr_ps, &model, &num_samples,
- original_file_name, encoded_file_name);
-
- hdr_to_frps(&fr_ps);
- stereo = fr_ps.stereo;
- error_protection = info.error_protection;
-
- if (info.lay == 1) { bitsPerSlot = 32; samplesPerFrame = 384; }
- else { bitsPerSlot = 8; samplesPerFrame = 1152; }
- /* Figure average number of 'slots' per frame. */
- /* Bitrate means TOTAL for both channels, not per side. */
- avg_slots_per_frame = ((double)samplesPerFrame /
- s_freq[info.sampling_frequency]) *
- ((double)bitrate[info.lay-1][info.bitrate_index] /
- (double)bitsPerSlot);
- whole_SpF = (int) avg_slots_per_frame;
- printf("slots/frame = %d\n",whole_SpF);
- frac_SpF = avg_slots_per_frame - (double)whole_SpF;
- slot_lag = -frac_SpF;
- printf("frac SpF=%.3f, tot bitrate=%d kbps, s freq=%.1f kHz\n",
- frac_SpF, bitrate[info.lay-1][info.bitrate_index],
- s_freq[info.sampling_frequency]);
-
- if (frac_SpF != 0)
- printf("Fractional number of slots, padding required\n");
- else info.padding = 0;
-
- while (get_audio(musicin, buffer, num_samples, stereo, info.lay) > 0) {
-
- fprintf(stderr, "{%4lu}", frameNum++); fflush(stderr);
- win_buf[0] = &buffer[0][0];
- win_buf[1] = &buffer[1][0];
- if (frac_SpF != 0) {
- if (slot_lag > (frac_SpF-1.0) ) {
- slot_lag -= frac_SpF;
- extra_slot = 0;
- info.padding = 0;
- /* printf("No padding for this frame\n"); */
- }
- else {
- extra_slot = 1;
- info.padding = 1;
- slot_lag += (1-frac_SpF);
- /* printf("Padding for this frame\n"); */
- }
- }
- adb = (whole_SpF+extra_slot) * bitsPerSlot;
-
- switch (info.lay) {
-
- /***************************** Layer I **********************************/
-
- case 1 :
- for (j=0;j<SCALE_BLOCK;j++)
- for (k=0;k<stereo;k++) {
- window_subband(&win_buf[k], &(*win_que)[k][0], k);
- filter_subband(&(*win_que)[k][0], &(*sb_sample)[k][0][j][0]);
- }
-
- I_scale_factor_calc(*sb_sample, scalar, stereo);
- if(fr_ps.actual_mode == MPG_MD_JOINT_STEREO) {
- I_combine_LR(*sb_sample, *j_sample);
- I_scale_factor_calc(j_sample, &j_scale, 1);
- }
-
- put_scale(scalar, &fr_ps, max_sc);
-
- if (model == 1) I_Psycho_One(buffer, max_sc, ltmin, &fr_ps);
- else {
- for (k=0;k<stereo;k++) {
- psycho_anal(&buffer[k][0],&sam[k][0], k, info.lay, snr32,
- (FLOAT)s_freq[info.sampling_frequency]*1000);
- for (i=0;i<SBLIMIT;i++) ltmin[k][i] = (double) snr32[i];
- }
- }
-
- I_main_bit_allocation(ltmin, bit_alloc, &adb, &fr_ps);
-
- if (error_protection) I_CRC_calc(&fr_ps, bit_alloc, &crc);
-
- encode_info(&fr_ps, &bs);
-
- if (error_protection) encode_CRC(crc, &bs);
-
- I_encode_bit_alloc(bit_alloc, &fr_ps, &bs);
- I_encode_scale(scalar, bit_alloc, &fr_ps, &bs);
- I_subband_quantization(scalar, *sb_sample, j_scale, *j_sample,
- bit_alloc, *subband, &fr_ps);
- I_sample_encoding(*subband, bit_alloc, &fr_ps, &bs);
- for (i=0;i<adb;i++) put1bit(&bs, 0);
- break;
-
- /***************************** Layer 2 **********************************/
-
- case 2 :
- for (i=0;i<3;i++) for (j=0;j<SCALE_BLOCK;j++)
- for (k=0;k<stereo;k++) {
- window_subband(&win_buf[k], &(*win_que)[k][0], k);
- filter_subband(&(*win_que)[k][0], &(*sb_sample)[k][i][j][0]);
- }
-
- II_scale_factor_calc(*sb_sample, scalar, stereo, fr_ps.sblimit);
- pick_scale(scalar, &fr_ps, max_sc);
- if(fr_ps.actual_mode == MPG_MD_JOINT_STEREO) {
- II_combine_LR(*sb_sample, *j_sample, fr_ps.sblimit);
- II_scale_factor_calc(j_sample, &j_scale, 1, fr_ps.sblimit);
- } /* this way we calculate more mono than we need */
- /* but it is cheap */
-
- if (model == 1) II_Psycho_One(buffer, max_sc, ltmin, &fr_ps);
- else {
- for (k=0;k<stereo;k++) {
- psycho_anal(&buffer[k][0],&sam[k][0], k,
- info.lay, snr32,
- (FLOAT)s_freq[info.sampling_frequency]*1000);
- for (i=0;i<SBLIMIT;i++) ltmin[k][i] = (double) snr32[i];
- }
- }
-
- II_transmission_pattern(scalar, scfsi, &fr_ps);
- II_main_bit_allocation(ltmin, scfsi, bit_alloc, &adb, &fr_ps);
-
- if (error_protection)
- II_CRC_calc(&fr_ps, bit_alloc, scfsi, &crc);
-
- encode_info(&fr_ps, &bs);
-
- if (error_protection) encode_CRC(crc, &bs);
-
- II_encode_bit_alloc(bit_alloc, &fr_ps, &bs);
- II_encode_scale(bit_alloc, scfsi, scalar, &fr_ps, &bs);
- II_subband_quantization(scalar, *sb_sample, j_scale,
- *j_sample, bit_alloc, *subband, &fr_ps);
- II_sample_encoding(*subband, bit_alloc, &fr_ps, &bs);
- for (i=0;i<adb;i++) put1bit(&bs, 0);
- break;
-
- /***************************** Layer 3 **********************************/
-
- case 3 : break;
-
- }
-
- frameBits = sstell(&bs) - sentBits;
- if(frameBits%bitsPerSlot) /* a program failure */
- fprintf(stderr,"Sent %ld bits = %ld slots plus %ld\n",
- frameBits, frameBits/bitsPerSlot,
- frameBits%bitsPerSlot);
- sentBits += frameBits;
-
- }
-
- close_bit_stream_w(&bs);
-
- printf("Avg slots/frame = %.3f; b/smp = %.2f; br = %.3f kbps\n",
- (FLOAT) sentBits / (frameNum * bitsPerSlot),
- (FLOAT) sentBits / (frameNum * samplesPerFrame),
- (FLOAT) sentBits / (frameNum * samplesPerFrame) *
- s_freq[info.sampling_frequency]);
-
- if (fclose(musicin) != 0){
- printf("Could not close \"%s\".\n", original_file_name);
- exit(2);
- }
-
- #ifdef MACINTOSH
- set_mac_file_attr(encoded_file_name, VOL_REF_NUM, CREATOR_ENCODE,
- FILETYPE_ENCODE);
- #endif
-
- printf("Encoding of \"%s\" with psychoacoustic model %d is finished\n",
- original_file_name, model);
- printf("The MPEG encoded output file name is \"%s\"\n",
- encoded_file_name);
- exit(0);
- }
-
- /************************************************************************
- /*
- /* usage
- /*
- /* PURPOSE: Writes command line syntax to the file specified by #stderr#
- /*
- /************************************************************************/
-
- static void usage() /* print syntax & exit */
- {
- fprintf(stderr,
- "usage: %s queries for all arguments, or\n",
- programName);
- fprintf(stderr,
- " %s [-l lay][-m mode][-p psy][-s sfrq][-b br][-d emp]\n",
- programName);
- fprintf(stderr,
- " [-c][-o][-e] inputPCM [outBS]\n");
- fprintf(stderr,"where\n");
- fprintf(stderr," -l lay use layer <lay> coding (dflt %4u)\n",DFLT_LAY);
- fprintf(stderr," -m mode channel mode : s/d/j/m (dflt %4c)\n",DFLT_MOD);
- fprintf(stderr," -p psy psychoacoustic model 1/2 (dflt %4u)\n",DFLT_PSY);
- fprintf(stderr," -s sfrq input smpl rate in kHz (dflt %4.1f)\n",DFLT_SFQ);
- fprintf(stderr," -b br total bitrate in kbps (dflt %4u)\n",DFLT_BRT);
- fprintf(stderr," -d emp de-emphasis n/5/c (dflt %4c)\n",DFLT_EMP);
- fprintf(stderr," -c mark as copyright\n");
- fprintf(stderr," -o mark as original\n");
- fprintf(stderr," -e add error protection\n");
- fprintf(stderr," inputPCM input PCM sound file (standard or AIFF)\n");
- fprintf(stderr," outBS output bit stream of encoded audio (dflt inName+%s)\n",
- DFLT_EXT);
- exit(1);
- }
-
- /************************************************************************
- /*
- /* aiff_check
- /*
- /* PURPOSE: Checks AIFF header information to make sure it is valid.
- /* Exits if not.
- /*
- /************************************************************************/
-
- void aiff_check(file_name, pcm_aiff_data)
- char *file_name; /* Pointer to name of AIFF file */
- IFF_AIFF *pcm_aiff_data; /* Pointer to AIFF data structure */
- {
-
- #ifdef IFF_LONG
- if (pcm_aiff_data->sampleType != IFF_ID_SSND) {
- #else
- if (strncmp(&pcm_aiff_data->sampleType,IFF_ID_SSND,4)) {
- #endif
- printf("Sound data is not PCM in \"%s\".\n", file_name);
- exit(1);
- }
-
- if(SmpFrqIndex((long)pcm_aiff_data->sampleRate) < 0) {
- printf("in \"%s\".\n", file_name);
- exit(1);
- }
-
- if (pcm_aiff_data->sampleSize != sizeof(short) * BITS_IN_A_BYTE) {
- printf("Sound data is not %d bits in \"%s\".\n",
- sizeof(short) * BITS_IN_A_BYTE, file_name);
- exit(1);
- }
-
- if (pcm_aiff_data->numChannels != MONO &&
- pcm_aiff_data->numChannels != STEREO) {
- printf("Sound data is not mono or stereo in \"%s\".\n", file_name);
- exit(1);
- }
-
- if (pcm_aiff_data->blkAlgn.blockSize != 0) {
- printf("Block size is not %lu bytes in \"%s\".\n", 0, file_name);
- exit(1);
- }
-
- if (pcm_aiff_data->blkAlgn.offset != 0) {
- printf("Block offset is not %lu bytes in \"%s\".\n", 0, file_name);
- exit(1);
- }
-
- }
-