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/*
MACLIB: A companion library to SDL for working with Macintosh (tm) data
Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* A WAVE class that can load itself from WAVE files or Mac 'snd ' resources */
#include <stdio.h>
#include <stdarg.h>
#include "SDL_audio.h"
#include "Mac_Resource.h"
class Wave {
public:
Wave() {
Init();
}
Wave(const char *wavefile, Uint16 desired_rate = 0) {
Init();
Load(wavefile, desired_rate);
}
Wave(Mac_ResData *snd, Uint16 desired_rate = 0) {
Init();
Load(snd, desired_rate);
}
~Wave() {
Free();
}
/* Load WAVE resources, converting to the desired sample rate */
int Load(const char *wavefile, Uint16 desired_rate = 0);
int Load(Mac_ResData *snd, Uint16 desired_rate = 0);
int Save(const char *wavefile);
void Rewind(void) {
soundptr = sound_data;
soundlen = sound_datalen;
}
void Forward(Uint32 distance) {
soundlen -= distance;
soundptr += distance;
}
Uint32 DataLeft(void) {
return(soundlen > 0 ? soundlen : 0);
}
Uint8 *Data(void) {
if ( soundlen > 0 )
return(soundptr);
return(NULL);
}
SDL_AudioSpec *Spec(void) {
return(&spec);
}
Uint32 Frequency(Uint16 desired_rate = 0);
Uint16 SampleSize(void) {
return(((spec.format&0xFF)/8)*spec.channels);
}
int BitsPerSample(void) {
return(spec.format&0xFF);
}
int Stereo(void) {
return(spec.channels/2);
}
char *Error(void) {
return(errstr);
}
private:
void Init(void);
void Free(void);
/* The SDL-ready audio specification */
SDL_AudioSpec spec;
Uint8 *sound_data;
Uint32 sound_datalen;
/* Current position of the WAVE file */
Uint8 *soundptr;
Sint32 soundlen;
/* Utility functions */
Uint32 ConvertRate(Uint16 rate_in, Uint16 rate_out,
Uint8 **samples, Uint32 n_samples, Uint8 s_size);
/* Useful for getting error feedback */
void error(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
SDL_vsnprintf(errbuf, sizeof(errbuf), fmt, ap);
va_end(ap);
errstr = errbuf;
}
char *errstr;
char errbuf[BUFSIZ];
};
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