static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
{
long snd_format = 0;
int i, resolution, format_signed, format_bigendian;
Uint16 test_format = SDL_FirstAudioFormat(spec->format);
int valid_datatype = 0;
resolution = spec->format & 0x00ff;
format_signed = ((spec->format & 0x8000)!=0);
format_bigendian = ((spec->format & 0x1000)!=0);
DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
DEBUG_PRINT(("channels=%d, ", spec->channels));
DEBUG_PRINT(("freq=%d\n", spec->freq));
if (spec->channels > 2) {
spec->channels = 2;
}
while ((!valid_datatype) && (test_format)) {
snd_format = Sndstatus(SND_QUERYFORMATS);
spec->format = test_format;
resolution = spec->format & 0xff;
format_signed = (spec->format & (1<<15));
format_bigendian = (spec->format & (1<<12));
switch (test_format) {
case AUDIO_U8:
case AUDIO_S8:
if (snd_format & SND_FORMAT8) {
valid_datatype = 1;
snd_format = Sndstatus(SND_QUERY8BIT);
}
break;
case AUDIO_U16LSB:
case AUDIO_S16LSB:
case AUDIO_U16MSB:
case AUDIO_S16MSB:
if (snd_format & SND_FORMAT16) {
valid_datatype = 1;
snd_format = Sndstatus(SND_QUERY16BIT);
}
break;
default:
test_format = SDL_NextAudioFormat();
break;
}
}
if (!valid_datatype) {
SDL_SetError("Unsupported audio format");
return (-1);
}
if (format_signed) {
if (snd_format & SND_FORMATSIGNED) {
} else if (snd_format & SND_FORMATUNSIGNED) {
spec->format = spec->format & (~0x8000);
}
} else {
if (snd_format & SND_FORMATUNSIGNED) {
} else if (snd_format & SND_FORMATSIGNED) {
spec->format |= 0x8000;
}
}
if (format_bigendian) {
if (snd_format & SND_FORMATBIGENDIAN) {
} else if (snd_format & SND_FORMATLITTLEENDIAN) {
spec->format = spec->format & (~0x1000);
}
} else {
if (snd_format & SND_FORMATLITTLEENDIAN) {
} else if (snd_format & SND_FORMATBIGENDIAN) {
spec->format |= 0x1000;
}
}
MINTAUDIO_freqcount=0;
for (i=1;i<4;i++) {
SDL_MintAudio_AddFrequency(this,
MASTERCLOCK_44K/(MASTERPREDIV_MILAN*(1<<i)), MASTERCLOCK_44K,
(1<<i)-1, -1);
}
#if 1
for (i=0; i<MINTAUDIO_freqcount; i++) {
DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock,
MINTAUDIO_frequencies[i].predivisor
));
}
#endif
MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, spec->freq);
spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
DEBUG_PRINT(("channels=%d, ", spec->channels));
DEBUG_PRINT(("freq=%d\n", spec->freq));
return 0;
}
static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
{
long snd_format;
int i, resolution, format_signed, format_bigendian;
resolution = spec->format & 0x00ff;
format_signed = ((spec->format & 0x8000)!=0);
format_bigendian = ((spec->format & 0x1000)!=0);
DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
DEBUG_PRINT(("channels=%d, ", spec->channels));
DEBUG_PRINT(("freq=%d\n", spec->freq));
/* Check formats available */
snd_format = Sndstatus(SND_QUERYFORMATS);
switch (resolution) {
case 8:
if ((snd_format & SND_FORMAT8)==0) {
SDL_SetError("Mint_CheckAudio: 8 bits samples not supported");
return -1;
}
snd_format = Sndstatus(SND_QUERY8BIT);
break;
case 16:
if ((snd_format & SND_FORMAT16)==0) {
SDL_SetError("Mint_CheckAudio: 16 bits samples not supported");
return -1;
}
snd_format = Sndstatus(SND_QUERY16BIT);
break;
default:
SDL_SetError("Mint_CheckAudio: Unsupported sample resolution");
return -1;
break;
}
/* Check signed/unsigned format */
if (format_signed) {
if (snd_format & SND_FORMATSIGNED) {
/* Ok */
} else if (snd_format & SND_FORMATUNSIGNED) {
/* Give unsigned format */
spec->format = spec->format & (~0x8000);
}
} else {
if (snd_format & SND_FORMATUNSIGNED) {
/* Ok */
} else if (snd_format & SND_FORMATSIGNED) {
/* Give signed format */
spec->format |= 0x8000;
}
}
if (format_bigendian) {
if (snd_format & SND_FORMATBIGENDIAN) {
/* Ok */
} else if (snd_format & SND_FORMATLITTLEENDIAN) {
/* Give little endian format */
spec->format = spec->format & (~0x1000);
}
} else {
if (snd_format & SND_FORMATLITTLEENDIAN) {
/* Ok */
} else if (snd_format & SND_FORMATBIGENDIAN) {
/* Give big endian format */
spec->format |= 0x1000;
}
}
/* Calculate and select the closest frequency */
MINTAUDIO_freqcount=0;
for (i=1;i<4;i++) {
SDL_MintAudio_AddFrequency(this, MASTERCLOCK_44K/(MASTERPREDIV_MILAN*(1<<i)), MASTERCLOCK_44K, (1<<i)-1);
}
#if 1
for (i=0; i<MINTAUDIO_freqcount; i++) {
DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock,
MINTAUDIO_frequencies[i].predivisor
));
}
#endif
MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, spec->freq);
spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
DEBUG_PRINT(("channels=%d, ", spec->channels));
DEBUG_PRINT(("freq=%d\n", spec->freq));
return 0;
}
