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EST_wave_io.cc
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EST_wave_io.cc
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/*************************************************************************/
/* */
/* Centre for Speech Technology Research */
/* University of Edinburgh, UK */
/* Copyright (c) 1996 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* THE UNIVERSITY OF EDINBURGH AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL THE UNIVERSITY OF EDINBURGH NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* Author : Alan Black and Paul Taylor */
/* Date : June 1996 */
/*-----------------------------------------------------------------------*/
/* File I/O functions specific to various file formats */
/* */
/* Note that internally data will always be shorts and */
/* native byte order, conversions to/from other byte formats */
/* or encodings happend at read/write time */
/* */
/*=======================================================================*/
#include <cstdlib>
#include <cstdio>
#include "EST_unix.h"
#include <cstring>
#include <limits>
#include "EST_wave_aux.h"
#include "EST_wave_utils.h"
#include "EST_strcasecmp.h"
#include "waveP.h"
#include "EST_FileType.h"
#include "EST_File.h"
using namespace std;
static int def_load_sample_rate = 16000;
/*************************************************************************/
/* */
/* Functions specific for each file format */
/* */
/*************************************************************************/
/*=======================================================================*/
/* Sphere Nist files */
/*=======================================================================*/
static const char *NIST_SIG = "NIST_1A\n 1024\n";
static const char *NIST_END_SIG = "end_head\n";
#define NIST_HDR_SIZE 1024
int nist_get_param_int(const char *hdr, const char *field, int def_val)
{
const char *p;
int val;
if (((p=strstr(hdr,field)) != NULL) &&
(strncmp(" -i ",p+strlen(field),4) == 0))
{
sscanf(p+strlen(field)+4,"%d",&val);
return val;
}
else
return def_val;
}
char *nist_get_param_str(const char *hdr, const char *field, const char *def_val)
{
const char *p;
char *val;
int size;
if (((p=strstr(hdr,field)) != NULL) &&
(strncmp(" -s",p+strlen(field),3) == 0))
{
sscanf(p+strlen(field)+3,"%d",&size);
val = walloc(char,size+1);
/* Hmm don't know how long the %d is so do it again */
sscanf(p+strlen(field)+3,"%d %s",&size,val);
return val;
}
else
return wstrdup(def_val);
}
const char *sample_type_to_nist(enum EST_sample_type_t sample_type)
{
const char *c;
switch (sample_type) {
case st_unknown:
c = ""; break;
case st_schar:
c = "PCM-1"; break;
case st_alaw:
c = "ALAW"; break;
case st_mulaw:
c = "ULAW"; break;
case st_short:
c = "pcm"; break;
case st_int:
c = "PCM-4"; break;
case st_float:
c = "REAL"; break;
case st_double:
c = "REAL"; break;
default:
fprintf(stderr,"Unknown sample type for nist");
c = "";
}
return c;
}
enum EST_sample_type_t nist_to_sample_type(char *type)
{
if ((streq(type,"pcm")) ||
(streq(type,"PCM")) ||
(streq(type,"pcm-2")))
return st_short;
if (strcmp(type,"pcm,embedded-shorten-v1.1") == 0)
return st_shorten;
else if ((EST_strcasecmp(type,"ULAW",NULL) == 0) ||
(EST_strcasecmp(type,"U-LAW",NULL) == 0) ||
(EST_strcasecmp(type,"mu-law",NULL) == 0) ||
(EST_strcasecmp(type,"mulaw",NULL) == 0))
return st_mulaw;
else if ((EST_strcasecmp(type,"ALAW",NULL) == 0) ||
(EST_strcasecmp(type,"A-LAW",NULL) == 0))
return st_alaw;
else if (strcmp(type,"alaw") == 0)
return st_alaw;
else if (strcmp(type,"PCM-1") == 0)
return st_schar;
else if (strcmp(type,"PCM-4") == 0)
return st_int;
else if (strcmp(type,"REAL") == 0)
return st_float;
else
{
fprintf(stderr,"NIST: unknown sample type: %s\n",type);
return st_unknown;
}
}
enum EST_read_status load_wave_nist(EST_TokenStream &ts, short **data, int
*num_samples, int *num_channels, int
*word_size, int *sample_rate, enum
EST_sample_type_t *sample_type, int *bo , int
offset, int length)
{
char header[NIST_HDR_SIZE];
int samps,sample_width,data_length,actual_bo;
int system_return;
unsigned char *file_data;
enum EST_sample_type_t actual_sample_type;
char *byte_order, *sample_coding=0;
int n;
int current_pos;
current_pos = ts.tell();
if (ts.fread(header,NIST_HDR_SIZE,1) != 1)
return wrong_format;
if (strncmp(header,NIST_SIG,strlen(NIST_SIG)) != 0)
return wrong_format;
samps = nist_get_param_int(header,"sample_count",-1);
*num_channels = nist_get_param_int(header,"channel_count",1);
sample_width = nist_get_param_int(header,"sample_n_bytes",2);
*sample_rate =
nist_get_param_int(header,"sample_rate",def_load_sample_rate);
byte_order = nist_get_param_str(header,"sample_byte_format",
(EST_BIG_ENDIAN ? "10" : "01"));
if (streq(byte_order,"mu-law"))
{
wfree(byte_order);
byte_order = wstrdup((EST_BIG_ENDIAN ? "10" : "01"));
sample_coding = wstrdup("ULAW");
}
else if (streq(byte_order,"a-law"))
{
wfree(byte_order);
byte_order = wstrdup((EST_BIG_ENDIAN ? "10" : "01"));
sample_coding = wstrdup("ALAW");
} else {
sample_coding = nist_get_param_str(header,"sample_coding","pcm");
}
/* code for reading in Tony Robinson's shorten files.
This is a temporary fix which calls the unshorten program on the
speech file and reads in the answer by calling this function.
It would be nice to have a simple library routine which did the
unshortening.
*/
if (streq(sample_coding,"pcm,embedded-shorten-v1.1"))
{
char *tmpfile, *cmdstr;
enum EST_read_status rval;
tmpfile = cmake_tmp_filename();
cmdstr = walloc(char,strlen(tmpfile)+200);
sprintf(cmdstr,"cstrshorten %s %s",
(const char*)ts.filename(),tmpfile);
printf("Command: %s\n", cmdstr);
system_return = system(cmdstr);
if (system_return != 0)
{
fprintf(stderr, "Command failed. Could not read nist file\n");
fprintf(stderr, "To read embedded-shorten-v1.1 nist files, \n");
fprintf(stderr, "shorten utility from Tony Robinson is required\n");
wfree(sample_coding);
wfree(byte_order);
wfree(tmpfile);
wfree(cmdstr);
return misc_read_error;
}
EST_TokenStream tt;
if (tt.open(tmpfile) < 0) {
fprintf(stderr, "Could not open %s\n", tmpfile);
wfree(sample_coding);
wfree(byte_order);
wfree(tmpfile);
wfree(cmdstr);
return misc_read_error;
}
rval = load_wave_nist(tt, data, num_samples,
num_channels, word_size, sample_rate,
sample_type, bo, offset, length);
unlink(tmpfile);
wfree(tmpfile);
wfree(cmdstr);
tt.close();
wfree(byte_order);
wfree(sample_coding);
return rval;
}
if (length == 0)
data_length = (samps - offset)*(*num_channels);
else
data_length = length*(*num_channels);
if (ts.seek(current_pos+NIST_HDR_SIZE+(sample_width*offset*(*num_channels))) != 0) {
fprintf(stderr, "WAVE read: Could not seek in file. Read error");
wfree(sample_coding);
wfree(byte_order);
return misc_read_error;
}
file_data = walloc(unsigned char,sample_width * data_length);
n = ts.fread(file_data,sample_width,data_length);
if ((n < 1) && (n != data_length))
{
wfree(file_data);
wfree(sample_coding);
wfree(byte_order);
return misc_read_error;
}
else if ((n < data_length) && (data_length/(*num_channels) == n))
{
fprintf(stderr,"WAVE read: nist header is (probably) non-standard\n");
fprintf(stderr,"WAVE read: assuming different num_channel interpretation\n");
data_length = n; /* wrongly headered file */
}
else if (n < data_length)
{
fprintf(stderr,"WAVE read: short file %s\n",
(const char *)ts.filename());
fprintf(stderr,"WAVE read: at %d got %d instead of %d samples\n",
offset,n,data_length);
data_length = n;
}
actual_sample_type = nist_to_sample_type(sample_coding);
actual_bo = ((strcmp(byte_order,"10") == 0) ? bo_big : bo_little);
*data = convert_raw_data(file_data,data_length,
actual_sample_type,actual_bo);
*num_samples = data_length/ (*num_channels);
*sample_type = st_short;
*bo = EST_NATIVE_BO;
*word_size = 2;
wfree(sample_coding);
wfree(byte_order);
return format_ok;
}
enum EST_write_status save_wave_nist_header(FILE *fp,
int num_samples, int num_channels,
int sample_rate,
enum EST_sample_type_t sample_type, int bo)
{
char h[1024], p[1024];
const char *t;
memset(h,0,1024);
strncat(h, NIST_SIG, 512);
sprintf(p, "channel_count -i %d\n", num_channels);
strcat(h, p);
sprintf(p, "sample_count -i %d\n", num_samples);
strcat(h, p);
sprintf(p, "sample_rate -i %d\n", sample_rate);
strcat(h, p);
t = sample_type_to_nist(sample_type);
if (t)
{
sprintf(p, "sample_coding -s%d %s\n", (signed)strlen(t), t);
strcat(h, p);
sprintf(p, "sample_n_bytes -i %d\n", get_word_size(sample_type));
strcat(h, p);
}
if (get_word_size(sample_type) > 1)
{
sprintf(p, "sample_byte_format -s%d %s\n", 2,
((bo == bo_big) ? "10" : "01"));
strcat(h, p);
}
if (strlen(h)+ strlen(NIST_END_SIG) > 1024) {
return misc_write_error;
}
strcat(h, NIST_END_SIG);
/*makes it nice to read */
strcat(h, "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
if (fwrite(&h, 1024, 1, fp) != 1)
return misc_write_error;
return write_ok;
}
enum EST_write_status save_wave_nist_data(FILE *fp, const short *data, int offset,
int num_samples, int num_channels,
int sample_rate,
enum EST_sample_type_t sample_type, int bo)
{
(void) sample_rate;
if (data == NULL)
return write_ok;
return save_raw_data(fp,data,offset,num_samples,num_channels,
sample_type,bo);
}
enum EST_write_status save_wave_nist(FILE *fp, const short *data, int offset,
int num_samples, int num_channels,
int sample_rate,
enum EST_sample_type_t sample_type, int bo)
{
save_wave_nist_header(fp, num_samples, num_channels,
sample_rate, sample_type, bo);
return save_wave_nist_data(fp, data, offset,
num_samples, num_channels,
sample_rate, sample_type, bo);
}
/*=======================================================================*/
/* EST's own format */
/*=======================================================================*/
enum EST_read_status load_wave_est(EST_TokenStream &ts, short **data, int
*num_samples, int *num_channels, int
*word_size, int *sample_rate, enum
EST_sample_type_t *sample_type, int *bo,
int offset, int length)
{
(void) offset;
int data_length, actual_bo;
short *file_data;
EST_String byte_order;
int n;
EST_EstFileType t;
EST_Option hinfo;
bool ascii;
EST_read_status r;
EST_sample_type_t actual_sample_type;
/*offset = 0;*/
if ((r = read_est_header(ts, hinfo, ascii, t)) != format_ok)
return r;
if (t != est_file_wave)
return misc_read_error;
*num_samples = hinfo.ival("NumSamples");
*num_channels = hinfo.ival("NumChannels");
*sample_rate = hinfo.ival("SampleRate");
byte_order = hinfo.val("ByteOrder");
if (length == 0)
data_length = (*num_samples)*(*num_channels);
else
data_length = length*(*num_channels);
file_data = walloc(short, data_length);
n = ts.fread(file_data, sizeof(short), data_length);
if ((n != data_length) && (n < 1))
{
cerr << "EST wave load: " << ts.pos_description() << endl;
cerr << "failed to read file\n";
wfree(file_data);
return misc_read_error;
}
else if (n != data_length)
{
cerr << "Wrong number of samples/channels in EST wave file\n";
cerr << ts.pos_description() << " ";
cerr << "expected " << data_length << " got " << n << endl;
data_length = n;
}
actual_bo = (byte_order == "10") ? bo_big : bo_little;
if (hinfo.present("SampleType"))
actual_sample_type = str_to_sample_type(hinfo.val("SampleType"));
else
actual_sample_type = st_short; // some older files don't have this
*data = convert_raw_data((unsigned char *)file_data,
data_length, actual_sample_type, actual_bo);
// because internally data is always shorts
*sample_type = st_short;
*bo = EST_NATIVE_BO;
*word_size = 2;
return format_ok;
}
enum EST_write_status save_wave_est_header(FILE *fp,
int num_samples, int num_channels,
int sample_rate,
enum EST_sample_type_t sample_type, int bo)
{
fprintf(fp, "EST_File wave\n");
fprintf(fp, "DataType binary\n");
fprintf(fp, "SampleRate %d\n", sample_rate);
fprintf(fp, "NumSamples %d\n", num_samples);
fprintf(fp, "NumChannels %d\n", num_channels);
fprintf(fp, "SampleType %s\n", sample_type_to_str(sample_type));
if (get_word_size(sample_type) > 1)
fprintf(fp, "ByteOrder %s\n", ((bo == bo_big) ? "10" : "01"));
fprintf(fp, "EST_Header_End\n");
return write_ok;
}
enum EST_write_status save_wave_est_data(FILE *fp, const short *data, int offset,
int num_samples, int num_channels,
int sample_rate,
enum EST_sample_type_t sample_type, int bo)
{
(void) sample_rate;
if (data == NULL)
return write_ok;
return save_raw_data(fp, data, offset, num_samples, num_channels,
sample_type, bo);
}
enum EST_write_status save_wave_est(FILE *fp, const short *data, int offset,
int num_samples, int num_channels,
int sample_rate,
enum EST_sample_type_t sample_type, int bo)
{
save_wave_est_header(fp, num_samples, num_channels,
sample_rate, sample_type, bo);
return save_wave_est_data(fp, data, offset,
num_samples, num_channels,
sample_rate, sample_type, bo);
}
/*=======================================================================*/
/* Microsoft RIFF (.wav) audio files */
/* */
/* The information on this format was gained by reading a document */
/* found on the net called "Multimedia Programming Interface and */
/* Data Specification v1.0" and by looking at Rick Richardson, */
/* Lance Norskog And Sundry Contributors code in SOX. All this code */
/* is rewritten from scratch though, but I couldn't do it without */
/* other's explanations. I would have used the SOX code directly but */
/* was not really in the right form so starting again was easier */
/*=======================================================================*/
#define WAVE_FORMAT_PCM 0x0001
#define WAVE_FORMAT_ADPCM 0x0002
#define WAVE_FORMAT_ALAW 0x0006
#define WAVE_FORMAT_MULAW 0x0007
enum EST_read_status load_wave_riff(EST_TokenStream &ts, short **data, int
*num_samples, int *num_channels, int
*word_size, int *sample_rate, enum
EST_sample_type_t *sample_type, int *bo , int
offset, int length)
{
char info[4];
int samps,sample_width,data_length;
short shortdata;
int dsize,intdata;
unsigned char *file_data;
enum EST_sample_type_t actual_sample_type;
if (ts.fread(info,sizeof(char),4) != 4)
return wrong_format; /* its almost definitely an error */
if (strncmp(info,"RIFF",4) != 0)
return wrong_format;
/* We've got a riff file */
/* Next 4 bytes are the file size */
if(ts.fread(&dsize,4,1) != 1) return misc_read_error;
/* .wav files are always little endian */
if (EST_BIG_ENDIAN) dsize = SWAPINT(dsize);
if ((ts.fread(info,sizeof(char),4) != 4) ||
(strncmp(info,"WAVE",4) != 0))
{
fprintf(stderr, "RIFF file is not of type WAVE\n");
return misc_read_error; /* not a wave file */
}
if ((ts.fread(info,sizeof(char),4) != 4) ||
(strncmp(info,"fmt ",4) != 0))
return misc_read_error; /* something else wrong */
if (ts.fread(&dsize,4,1) != 1) return misc_read_error;
if (EST_BIG_ENDIAN) dsize = SWAPINT(dsize);
if (ts.fread(&shortdata,2,1) != 1) return misc_read_error;
if (EST_BIG_ENDIAN) shortdata = SWAPSHORT(shortdata);
switch (shortdata)
{
/* This is a non-proprietary format */
case WAVE_FORMAT_PCM:
actual_sample_type = st_short; break;
/* The follow are registered proprietary WAVE formats (?) */
case WAVE_FORMAT_MULAW:
actual_sample_type = st_mulaw; break;
case WAVE_FORMAT_ALAW:
actual_sample_type = st_alaw; break;
case WAVE_FORMAT_ADPCM:
fprintf(stderr, "RIFF file: unsupported proprietary sample format ADPCM\n");
actual_sample_type = st_short;
break;
/* actual_sample_type = st_adpcm; break; */ /* yes but which adpcm ! */
default:
fprintf(stderr, "RIFF file: unknown sample format\n");
actual_sample_type = st_short;
/* return misc_read_error; */
}
if (ts.fread(&shortdata,2,1) != 1) return misc_read_error;
if (EST_BIG_ENDIAN) shortdata = SWAPSHORT(shortdata);
*num_channels = shortdata;
if (ts.fread(sample_rate,4,1) != 1) return misc_read_error;
if (EST_BIG_ENDIAN) *sample_rate = SWAPINT(*sample_rate);
if (ts.fread(&intdata,4,1) != 1) return misc_read_error; /* average bytes per second -- ignored */
if (EST_BIG_ENDIAN) intdata = SWAPINT(intdata);
if (ts.fread(&shortdata,2,1) != 1) return misc_read_error; /* block align ? */
if (EST_BIG_ENDIAN) shortdata = SWAPSHORT(shortdata);
if (ts.fread(&shortdata,2,1) != 1) return misc_read_error;
if (EST_BIG_ENDIAN) shortdata = SWAPSHORT(shortdata);
sample_width = (shortdata+7)/8;
if ((sample_width == 1) && (actual_sample_type == st_short))
actual_sample_type = st_uchar; /* oops I meant 8 bit */
if (ts.seek((dsize-16)+ts.tell()) != 0) { /* skip rest of header */
fprintf(stderr, "Could not skip header. Read error");
return misc_read_error;
}
while (1)
{
if (ts.fread(info,sizeof(char),4) != 4)
{
fprintf(stderr,"RIFF file truncated\n");
return misc_read_error; /* something else wrong */
}
if (strncmp(info,"data",4) == 0)
{
if (ts.fread(&samps,4,1) != 1) return misc_read_error;
if (EST_BIG_ENDIAN) samps = SWAPINT(samps);
samps /= (sample_width*(*num_channels));
break;
}
else if (strncmp(info,"fact",4) == 0)
{ /* some other type of chunk -- skip it */
if (ts.fread(&samps,4,1) != 1) return misc_read_error;
if (EST_BIG_ENDIAN) samps = SWAPINT(samps);
if (ts.seek(samps+ts.tell()) != 0) { /* skip rest of header */
fprintf(stderr, "Could not seek in file. Read error");
return misc_read_error;
}
/* Hope this is the right amount */
}
else
{
// fprintf(stderr,"Ignoring unsupported chunk type \"%c%c%c%c\" in RIFF file\n",
// info[0],info[1],info[2],info[3]);
//return misc_read_error;
if(ts.fread(&dsize,4,1) != 1) return misc_read_error;
if (EST_BIG_ENDIAN) dsize = SWAPINT(dsize);
if (ts.seek(dsize+ts.tell()) != 0) { /* skip this chunk */
fprintf(stderr, "Wav file: Read error");
return misc_read_error;
}
}
}
if (length == 0)
data_length = (samps - offset)*(*num_channels);
else
data_length = length*(*num_channels);
if (ts.seek((sample_width*offset*(*num_channels))+ts.tell()) != 0) {
fprintf(stderr, "Read error\n");
return misc_read_error;
}
if (data_length < 0) {
fprintf(stderr, "Read error\n");
return misc_read_error;
}
if ((size_t) data_length > std::numeric_limits<std::size_t>::max()/sample_width) {
fprintf(stderr, "Read error: Data length too big\n");
return misc_read_error;
}
file_data = walloc(unsigned char,sample_width * data_length);
if ((dsize=ts.fread(file_data,sample_width,data_length)) != data_length)
{
/* It seems so many WAV files have their datasize wrong I'll */
/* let it through -- I think SOX is a major culprit */
if (length == 0) /* the file did the identification */
fprintf(stderr,"Unexpected end of file but continuing (apparently missing %d samples)\n",data_length-dsize);
else
{
fprintf(stderr,"Unexpected end of file: (missing %d samples)\n",data_length-dsize);
wfree(file_data);
return misc_read_error;
}
}
*data = convert_raw_data(file_data,dsize,
actual_sample_type, bo_little);
*num_samples = dsize / (*num_channels);
*sample_type = st_short;
*bo = EST_NATIVE_BO;
*word_size = 2;
return format_ok;
}
enum EST_write_status save_wave_riff_header(FILE *fp, int num_samples,
int num_channels, int sample_rate,
enum EST_sample_type_t sample_type, int bo)
{
(void)bo;
const char *info;
int data_size, data_int;
short data_short;
if (sample_type == st_schar)
{
EST_warning("RIFF format: Signed 8-bit not allowed by this file format");
sample_type=st_uchar;
}
info = "RIFF"; fwrite(info,4,1,fp);
data_size = num_channels*num_samples*get_word_size(sample_type)+ 8+16+12;
/* WAV files are always LITTLE_ENDIAN (i.e. intel x86 format) */
if (EST_BIG_ENDIAN) data_size = SWAPINT(data_size);
fwrite(&data_size,1,4,fp); /* total number of bytes in file */
info = "WAVE"; fwrite(info,4,1,fp);
info = "fmt "; fwrite(info,4,1,fp);
data_size = 16;
if (EST_BIG_ENDIAN) data_size = SWAPINT(data_size);
fwrite(&data_size,1,4,fp); /* size of header */
switch (sample_type)
{
case st_short: data_short = WAVE_FORMAT_PCM; break;
case st_uchar: data_short = WAVE_FORMAT_PCM; break;
case st_mulaw: data_short = WAVE_FORMAT_MULAW; break;
case st_alaw: data_short = WAVE_FORMAT_ALAW; break;
case st_adpcm: data_short = WAVE_FORMAT_ADPCM; break;
default:
fprintf(stderr,"RIFF format: unsupported data format %d\n",
sample_type);
return misc_write_error;
}
if (EST_BIG_ENDIAN) data_short = SWAPSHORT(data_short);
fwrite(&data_short,1,2,fp); /* sample type */
data_short = num_channels;
if (EST_BIG_ENDIAN) data_short = SWAPSHORT(data_short);
fwrite(&data_short,1,2,fp); /* number of channels */
data_int = sample_rate;
if (EST_BIG_ENDIAN) data_int = SWAPINT(data_int);
fwrite(&data_int,1,4,fp); /* sample rate */
data_int = sample_rate * num_channels * get_word_size(sample_type);
if (EST_BIG_ENDIAN) data_int = SWAPINT(data_int);
fwrite(&data_int,1,4,fp); /* Average bytes per second */
data_short = num_channels * get_word_size(sample_type);
if (EST_BIG_ENDIAN) data_short = SWAPSHORT(data_short);
fwrite(&data_short,1,2,fp); /* block align */
data_short = get_word_size(sample_type) * 8;
if (EST_BIG_ENDIAN) data_short = SWAPSHORT(data_short);
fwrite(&data_short,1,2,fp); /* bits per sample */
info = "data"; fwrite(info,4,1,fp);
data_size = num_channels*num_samples*get_word_size(sample_type);
if (EST_BIG_ENDIAN) data_size = SWAPINT(data_size);
fwrite(&data_size,1,4,fp); /* total number of bytes in data */
return write_ok;
}
enum EST_write_status save_wave_riff_data(FILE *fp, const short *data,
int offset, int num_samples, int num_channels,
int sample_rate,
enum EST_sample_type_t sample_type, int bo)
{
(void)sample_rate;
(void)bo;
if (data == NULL)
return write_ok;
return save_raw_data(fp,data,offset,num_samples,num_channels,
sample_type,bo_little);
}
enum EST_write_status save_wave_riff(FILE *fp, const short *data, int offset,
int num_samples, int num_channels,
int sample_rate,
enum EST_sample_type_t sample_type, int bo)
{
save_wave_riff_header(fp, num_samples, num_channels, sample_rate,
sample_type, bo);
return save_wave_riff_data(fp, data, offset, num_samples,
num_channels, sample_rate, sample_type, bo);
}
/*=======================================================================*/
/* Amiga/Apple AIFF waveform format */
/* This was constructed using info in AudioIFF1.3.hqx found on the web */
/* and also I did look at SOX's aiff.c written by Guido van Rossum */
/* and Sundry Contributors. */
/*=======================================================================*/
struct AIFFchunk {
char id[4];
int size;
};
struct AIFFssnd { /* Sound Data Chunk */
int offset;
int blocksize;
};
enum EST_read_status load_wave_aiff(EST_TokenStream &ts, short **data, int
*num_samples, int *num_channels, int
*word_size, int *sample_rate, enum
EST_sample_type_t *sample_type, int *bo , int
offset, int length)
{
char info[4];
struct AIFFchunk chunk;
short comm_channels = -2;
int comm_samples;
short comm_bits;
unsigned char ieee_ext_sample_rate[10];
struct AIFFssnd ssndchunk;
enum EST_sample_type_t actual_sample_type;
int dsize,data_length,n;
unsigned char *file_data;
if (ts.fread(info,sizeof(char),4) != 4)
return wrong_format; /* but its almost definitely an error */
if (strncmp(info,"FORM",4) != 0)
return wrong_format;
/* We've got an aiff file, I hope */
if (ts.fread(&dsize,4,1) != 1) return misc_read_error;
if (EST_LITTLE_ENDIAN) /* file is in different byte order */
dsize = SWAPINT(dsize);
if ((ts.fread(info,sizeof(char),4) != 4) ||
(strncmp(info,"AIFF",4) != 0))
{
fprintf(stderr, "AIFF file does not have AIFF chunk\n");
return misc_read_error;
}
for ( ; ts.fread(&chunk, sizeof(chunk), 1) == 1 ; )
{ /* for each chunk in the file */
if (EST_LITTLE_ENDIAN) /* file is in different byte order */
chunk.size = SWAPINT(chunk.size);
if (strncmp(chunk.id,"COMM",4) == 0)
{
if (chunk.size != 18)
{
fprintf(stderr,"AIFF chunk: bad size\n");
return misc_read_error;
}
if (ts.fread(&comm_channels, sizeof(short), 1) != 1)
return misc_read_error;
if (ts.fread(&comm_samples, sizeof(int), 1) != 1)
return misc_read_error;
if (ts.fread(&comm_bits, sizeof(short), 1) != 1)
return misc_read_error;
if (ts.fread(ieee_ext_sample_rate, 10, 1) != 1)
{
fprintf(stderr,"AIFF chunk: eof within COMM chunk\n");
return misc_read_error;
}
if (EST_LITTLE_ENDIAN)
{
comm_channels = SWAPSHORT(comm_channels);
comm_samples = SWAPINT(comm_samples);
comm_bits = SWAPSHORT(comm_bits);
}
*sample_rate = (int)ConvertFromIeeeExtended(ieee_ext_sample_rate);
if (comm_channels < 0)
{
fprintf(stderr, "AIFF chunk: Wrong comm channels\n");
return wrong_format;
}
}
else if (strncmp(chunk.id,"SSND",4) == 0)
{
if (ts.fread(&ssndchunk, sizeof(ssndchunk), 1) != 1)
{
fprintf(stderr,"AIFF chunk: eof within SSND chunk\n");
return misc_read_error;
}
if (EST_LITTLE_ENDIAN)
{
ssndchunk.offset = SWAPINT(ssndchunk.offset);
ssndchunk.blocksize = SWAPINT(ssndchunk.blocksize);
}
if (comm_channels < 0) {
fprintf(stderr, "AIFF: COMM chunk missing\n");
return wrong_format;
}
*num_channels = comm_channels;
switch (comm_bits)
{
case 8: actual_sample_type = st_uchar; break;
case 16: actual_sample_type = st_short; break;
default:
fprintf(stderr,"AIFF: unsupported sample width %d bits\n",
comm_bits);
return misc_read_error;
}
if (ts.seek(ssndchunk.offset+(comm_channels*offset)+ts.tell()) != 0) {
fprintf(stderr, "AIFF: Read error\n");
return misc_read_error;
}
if (length == 0)
data_length = (comm_samples-offset)*comm_channels;
else
data_length = length*comm_channels;
if (data_length < 0 || comm_channels < 0 || get_word_size(actual_sample_type) < 0) {
fprintf(stderr, "AIFF: Read error\n");
return misc_read_error;
}
size_t bytes_to_read;
if ((size_t)data_length < std::numeric_limits<std::size_t>::max()/comm_channels) {
bytes_to_read = data_length * comm_channels;
} else {
fprintf(stderr, "AIFF: Read error\n");
return misc_read_error;
}
if ((size_t)bytes_to_read < std::numeric_limits<std::size_t>::max()/get_word_size(actual_sample_type)) {
bytes_to_read *= get_word_size(actual_sample_type);
} else {
fprintf(stderr, "AIFF: Read error\n");
return misc_read_error;
}
/*
if ((size_t)bytes_to_read < std::numeric_limits<std::size_t>::max()/sizeof(unsigned char)) {
bytes_to_read *= sizeof(unsigned char);
} else {
fprintf(stderr, "AIFF: Read error\n");
return misc_read_error;
}
*/
file_data = walloc(unsigned char, bytes_to_read);
if ((n=ts.fread(file_data,get_word_size(actual_sample_type),
data_length)) != data_length)
{
fprintf(stderr,"AIFF read: short file %s\n",
(const char *)ts.filename());
fprintf(stderr,"AIFF read: at %d got %d instead of %d samples\n",
offset,n,data_length);
data_length = n;
}
*data = convert_raw_data(file_data,data_length,
actual_sample_type,bo_big);
*num_samples = data_length/comm_channels;
*sample_type = st_short;
*word_size = 2;
*bo = EST_NATIVE_BO;
break; /* only care about the first SSND chunk */
}
else
{ /* skip bytes in chunk */
if (ts.seek(ts.tell()+chunk.size) != 0) {
fprintf(stderr, "AIFF: Read error\n");
return misc_read_error;
}
}
}
return format_ok;
}
enum EST_write_status save_wave_aiff_header(FILE *fp,
int num_samples, int num_channels,
int sample_rate,
enum EST_sample_type_t sample_type, int bo)
{
(void)bo;
const char *info;
int data_size, data_int;
unsigned char ieee_ext_buf[10];
short data_short;
info = "FORM";
fwrite(info,1,4,fp);
/* This number seems to be derived different for each example */
data_size = 54+(num_samples*num_channels*get_word_size(sample_type));
if (EST_LITTLE_ENDIAN)
data_size = SWAPINT(data_size);
fwrite(&data_size,1,4,fp);
info = "AIFF";
fwrite(info,1,4,fp);
info = "COMM";
fwrite(info,1,4,fp);
data_int = 18;
if (EST_LITTLE_ENDIAN)
data_int = SWAPINT(data_int);
fwrite(&data_int,1,4,fp);
data_short = num_channels;
if (EST_LITTLE_ENDIAN)
data_short = SWAPSHORT(data_short);
fwrite(&data_short,1,2,fp);
data_int = num_samples;
if (EST_LITTLE_ENDIAN)
data_int = SWAPINT(data_int);
fwrite(&data_int,1,4,fp);
data_short = 8*get_word_size(sample_type);
if (EST_LITTLE_ENDIAN)
data_short = SWAPSHORT(data_short);
fwrite(&data_short,1,2,fp);
ConvertToIeeeExtended((double)sample_rate,ieee_ext_buf);
fwrite(ieee_ext_buf,1,10,fp);
info = "SSND";
fwrite(info,1,4,fp);
data_int = 8 + (num_samples*num_channels*get_word_size(sample_type));
if (EST_LITTLE_ENDIAN)
data_int = SWAPINT(data_int);
fwrite(&data_int,1,4,fp);
data_int = 0;
if (EST_LITTLE_ENDIAN)