// Initialize Sound Card ------------------------------------------------------
static int Sound_Init_SoundCard (void)
{
int i;
AUDIOINFO Audio_Infos;
ConsolePrintf (Msg_Get (MSG_Sound_Init_Soundcard), Sound.SampleRate);
ConsolePrint ("\n");
Audio_Infos.nDeviceId = Sound.SoundCard;
Audio_Infos.wFormat = AUDIO_FORMAT_16BITS | AUDIO_FORMAT_STEREO; // FIXME: Stereo ?
Audio_Infos.nSampleRate = audio_sample_rate = Sound.SampleRate;
if (AOpenAudio(&Audio_Infos) != AUDIO_ERROR_NONE)
{
Quit_Msg ("%s", Msg_Get (MSG_Sound_Init_Error_Audio));
return (MEKA_ERR_FAIL);
}
// FIXME: original sound engine was trying different sample rate on failure
// Unused
// Maybe it was intended to check out number of channels there ?
// AGetAudioCaps (Audio_Infos.nDeviceId, &Audio_Caps);
// Open voices
if (AOpenVoices(Sound.Voices_Max) != AUDIO_ERROR_NONE)
{
Quit_Msg ("%s", Msg_Get (MSG_Sound_Init_Error_Voices));
return (MEKA_ERR_FAIL);
}
ASetAudioMixerValue (AUDIO_MIXER_MASTER_VOLUME, 256);
// Allocate voices and waveforms
Sound.Voices = Memory_Alloc (sizeof (t_voice) * Sound.Voices_Max);
for (i = 0; i < Sound.Voices_Max; i++)
{
if (ACreateAudioVoice(&Sound.Voices[i].hVoice) != AUDIO_ERROR_NONE)
{
Quit_Msg (Msg_Get (MSG_Sound_Init_Error_Voice_N), i);
return (MEKA_ERR_FAIL);
}
ASetVoicePanning(Sound.Voices[i].hVoice, 128); // Center voice
Sound.Voices[i].lpWave = NULL;
Sound.Voices[i].playing = FALSE;
}
// FIXME: is this needed ?
AUpdateAudio ();
// FIXME: is this needed ?
// Check frame sample rate
audio_sample_rate = nominal_sample_rate = Audio_Infos.nSampleRate;
return (MEKA_ERR_OK);
}
int main(void)
{
AUDIOINFO info;
LPAUDIOMODULE lpModule;
LPAUDIOWAVE lpWave;
HAC hVoice;
BOOL stopped;
/* initialize audio library */
AInitialize();
/* open audio device */
info.nDeviceId = AUDIO_DEVICE_MAPPER;
info.wFormat = AUDIO_FORMAT_16BITS | AUDIO_FORMAT_STEREO;
info.nSampleRate = 44100;
AOpenAudio(&info);
/* load module and waveform file */
ALoadModuleFile("test.s3m", &lpModule, 0);
ALoadWaveFile("test.wav", &lpWave, 0);
/* open voices for module and waveform */
AOpenVoices(lpModule->nTracks + 1);
/* play the module file */
APlayModule(lpModule);
ASetModuleVolume(64);
/* play the waveform through a voice */
ACreateAudioVoice(&hVoice);
APlayVoice(hVoice, lpWave);
ASetVoiceVolume(hVoice, 48);
ASetVoicePanning(hVoice, 128);
/* program main execution loop */
printf("Playing module and waveform, press any key to stop.\n");
while (!kbhit()) {
/* update audio system */
AUpdateAudio();
/* restart waveform if stopped */
AGetVoiceStatus(hVoice, &stopped);
if (stopped) APlayVoice(hVoice, lpWave);
/* check if the module is stopped */
AGetModuleStatus(&stopped);
if (stopped) break;
}
/* stop playing the waveform */
AStopVoice(hVoice);
ADestroyAudioVoice(hVoice);
/* stop playing the module */
AStopModule();
ACloseVoices();
/* release the waveform & module */
AFreeWaveFile(lpWave);
AFreeModuleFile(lpModule);
/* close audio device */
ACloseAudio();
return 0;
}
int msdos_init_sound(int *rate, int card)
{
int i;
seal_sample_rate = *rate;
seal_sound_card = card;
if (AInitialize() != AUDIO_ERROR_NONE)
return 1;
/* Ask the user if no sound card was chosen */
if (seal_sound_card == -1)
{
unsigned int k;
printf("\n SELECT YOUR AUDIO DEVICE :\n\n"
" AWE32/64 playback requires onboard DRAM,\n"
" Sound Blaster playback is the most compatible & better for emulation\n\n");
for (k = 0;k < AGetAudioNumDevs();k++)
{
if (AGetAudioDevCaps(k,&caps) == AUDIO_ERROR_NONE)
printf(" %2d. %s\n",k,caps.szProductName);
}
printf("\n");
if (k < 10)
{
i = getch();
seal_sound_card = i - '0';
}
else
scanf("%d",&seal_sound_card);
}
/* initialize SEAL audio library */
if (seal_sound_card == 0) /* silence */
{
/* update the Machine structure to show that sound is disabled */
seal_sample_rate = 0;
exit(0);
return 0;
}
/* open audio device */
/* info.nDeviceId = AUDIO_DEVICE_MAPPER;*/
info.nDeviceId = seal_sound_card;
/* always use 16 bit mixing if possible - better quality and same speed of 8 bit */
info.wFormat = AUDIO_FORMAT_16BITS | AUDIO_FORMAT_STEREO | AUDIO_FORMAT_RAW_SAMPLE;
info.nSampleRate = seal_sample_rate;
if (AOpenAudio(&info) != AUDIO_ERROR_NONE)
{
return (1);
}
AGetAudioDevCaps(info.nDeviceId,&caps);
printf("Using `%s' at %d-bit %s %u Hz\n",
caps.szProductName,
info.wFormat & AUDIO_FORMAT_16BITS ? 16 : 8,
info.wFormat & AUDIO_FORMAT_STEREO ? "stereo" : "mono",
info.nSampleRate);
/* open and allocate voices, allocate waveforms */
if (AOpenVoices(NUMVOICES) != AUDIO_ERROR_NONE)
{
printf("voices initialization failed\n");
return 1;
}
for (i = 0; i < NUMVOICES; i++)
{
if (ACreateAudioVoice(&hVoice[i]) != AUDIO_ERROR_NONE)
{
printf("voice #%d creation failed\n",i);
return 1;
}
ASetVoicePanning(hVoice[i],128);
lpWave[i] = 0;
}
/* update the Machine structure to reflect the actual sample rate */
*rate = seal_sample_rate = info.nSampleRate;
{
uclock_t a,b;
LONG start,end;
if ((lpWave[0] = (LPAUDIOWAVE)malloc(sizeof(AUDIOWAVE))) == 0)
return 1;
lpWave[0]->wFormat = AUDIO_FORMAT_8BITS | AUDIO_FORMAT_MONO;
lpWave[0]->nSampleRate = seal_sample_rate;
lpWave[0]->dwLength = 3*seal_sample_rate;
lpWave[0]->dwLoopStart = 0;
lpWave[0]->dwLoopEnd = 3*seal_sample_rate;
if (ACreateAudioData(lpWave[0]) != AUDIO_ERROR_NONE)
{
free(lpWave[0]);
lpWave[0] = 0;
return 1;
}
memset(lpWave[0]->lpData,0,3*seal_sample_rate);
/* upload the data to the audio DRAM local memory */
AWriteAudioData(lpWave[0],0,3*seal_sample_rate);
APrimeVoice(hVoice[0],lpWave[0]);
ASetVoiceFrequency(hVoice[0],seal_sample_rate);
ASetVoiceVolume(hVoice[0],0);
AStartVoice(hVoice[0]);
a = uclock();
/* wait some time to let everything stabilize */
do
{
osd_update_audio();
b = uclock();
} while (b-a < UCLOCKS_PER_SEC/10);
a = uclock();
AGetVoicePosition(hVoice[0],&start);
do
{
osd_update_audio();
b = uclock();
} while (b-a < UCLOCKS_PER_SEC);
AGetVoicePosition(hVoice[0],&end);
nominal_sample_rate = seal_sample_rate;
seal_sample_rate = end - start;
AStopVoice(hVoice[0]);
ADestroyAudioData(lpWave[0]);
free(lpWave[0]);
lpWave[0] = 0;
}
osd_set_mastervolume(0); /* start at maximum volume */
return 0;
}
void playstreamedsample(int channel,signed char *data,int len,int freq,int volume,int pan,int bits)
{
static int playing[NUMVOICES];
static int c[NUMVOICES];
/* backwards compatibility with old 0-255 volume range */
if (volume > 100) volume = volume * 25 / 255;
if (seal_sample_rate == 0 || channel >= NUMVOICES) return;
if (!playing[channel])
{
if (lpWave[channel])
{
AStopVoice(hVoice[channel]);
ADestroyAudioData(lpWave[channel]);
free(lpWave[channel]);
lpWave[channel] = 0;
}
if ((lpWave[channel] = (LPAUDIOWAVE)malloc(sizeof(AUDIOWAVE))) == 0)
return;
lpWave[channel]->wFormat = (bits == 8 ? AUDIO_FORMAT_8BITS : AUDIO_FORMAT_16BITS)
| AUDIO_FORMAT_MONO | AUDIO_FORMAT_LOOP;
lpWave[channel]->nSampleRate = nominal_sample_rate;
lpWave[channel]->dwLength = 3*len;
lpWave[channel]->dwLoopStart = 0;
lpWave[channel]->dwLoopEnd = 3*len;
if (ACreateAudioData(lpWave[channel]) != AUDIO_ERROR_NONE)
{
free(lpWave[channel]);
lpWave[channel] = 0;
return;
}
memset(lpWave[channel]->lpData,0,3*len);
memcpy(lpWave[channel]->lpData,data,len);
/* upload the data to the audio DRAM local memory */
AWriteAudioData(lpWave[channel],0,3*len);
APrimeVoice(hVoice[channel],lpWave[channel]);
/* need to cast to double because freq*nominal_sample_rate can exceed the size of an int */
ASetVoiceFrequency(hVoice[channel],(double)freq*nominal_sample_rate/seal_sample_rate);
AStartVoice(hVoice[channel]);
playing[channel] = 1;
c[channel] = 1;
}
else
{
LONG pos;
for(;;)
{
AGetVoicePosition(hVoice[channel],&pos);
if (c[channel] == 0 && pos >= len) break;
if (c[channel] == 1 && (pos < len || pos >= 2*len)) break;
if (c[channel] == 2 && pos < 2*len) break;
osd_update_audio();
}
memcpy(&lpWave[channel]->lpData[len * c[channel]],data,len);
AWriteAudioData(lpWave[channel],len*c[channel],len);
c[channel]++;
if (c[channel] == 3) c[channel] = 0;
}
ASetVoiceVolume(hVoice[channel],volume * 64 / 100);
ASetVoicePanning(hVoice[channel],(pan + 100) * 255 / 200);
}
int main(void)
{
AUDIOINFO info;
LPAUDIOWAVE lpWave;
HAC hVoice[NUMVOICES];
BOOL stopped;
UINT n, m;
/* initialize audio library */
AInitialize();
/* open audio device */
info.nDeviceId = AUDIO_DEVICE_MAPPER;
info.wFormat = AUDIO_FORMAT_16BITS | AUDIO_FORMAT_STEREO;
info.nSampleRate = 44100;
AOpenAudio(&info);
/* load waveform file */
ALoadWaveFile("test.wav", &lpWave, 0);
/* open and allocate voices */
AOpenVoices(NUMVOICES);
for (n = 0; n < NUMVOICES; n++) {
ACreateAudioVoice(&hVoice[n]);
ASetVoiceVolume(hVoice[n], 64);
ASetVoicePanning(hVoice[n], n & 1 ? 0 : 255);
}
/* program main execution loop */
printf("Playing waveform, press any key to stop.\n");
for (n = m = 0; !kbhit() && n < 48 - 7; n++) {
/* play chord C-E-G */
APlayVoice(hVoice[m+0], lpWave);
APlayVoice(hVoice[m+1], lpWave);
APlayVoice(hVoice[m+2], lpWave);
ASetVoiceFrequency(hVoice[m+0], FREQ(aPeriodTable[n+0]));
ASetVoiceFrequency(hVoice[m+1], FREQ(aPeriodTable[n+4]));
ASetVoiceFrequency(hVoice[m+2], FREQ(aPeriodTable[n+7]));
m = (m + 3) % NUMVOICES;
/* wait until note finishes */
do {
/* update audio system */
AUpdateAudio();
AGetVoiceStatus(hVoice[0], &stopped);
} while (!stopped);
}
/* stop and release voices */
for (n = 0; n < NUMVOICES; n++) {
AStopVoice(hVoice[n]);
ADestroyAudioVoice(hVoice[n]);
}
ACloseVoices();
/* release the waveform file */
AFreeWaveFile(lpWave);
/* close audio device */
ACloseAudio();
return 0;
}
int osd_start_audio_stream(int stereo)
{
#ifdef USE_SEAL
int channel;
#endif
if (stereo) stereo = 1; /* make sure it's either 0 or 1 */
stream_cache_stereo = stereo;
/* determine the number of samples per frame */
samples_per_frame = (double)Machine->sample_rate / (double)Machine->drv->frames_per_second;
/* compute how many samples to generate this frame */
samples_left_over = samples_per_frame;
samples_this_frame = (UINT32)samples_left_over;
samples_left_over -= (double)samples_this_frame;
audio_buffer_length = NUM_BUFFERS * samples_per_frame + 20;
if (Machine->sample_rate == 0) return 0;
#ifdef USE_SEAL
for (channel = 0;channel <= stereo;channel++)
{
if (ACreateAudioVoice(&hVoice[channel]) != AUDIO_ERROR_NONE)
return 0;
if ((lpWave[channel] = (LPAUDIOWAVE)malloc(sizeof(AUDIOWAVE))) == 0)
{
ADestroyAudioVoice(hVoice[channel]);
return 0;
}
lpWave[channel]->wFormat = AUDIO_FORMAT_16BITS | AUDIO_FORMAT_MONO | AUDIO_FORMAT_LOOP;
lpWave[channel]->nSampleRate = nominal_sample_rate;
lpWave[channel]->dwLength = 2*audio_buffer_length;
lpWave[channel]->dwLoopStart = 0;
lpWave[channel]->dwLoopEnd = lpWave[channel]->dwLength;
if (ACreateAudioData(lpWave[channel]) != AUDIO_ERROR_NONE)
{
free(lpWave[channel]);
lpWave[channel] = 0;
return 0;
}
memset(lpWave[channel]->lpData,0,lpWave[channel]->dwLength);
APrimeVoice(hVoice[channel],lpWave[channel]);
ASetVoiceFrequency(hVoice[channel],nominal_sample_rate);
}
if (stereo)
{
/* SEAL doubles volume for panned channels, so we have to compensate */
ASetVoiceVolume(hVoice[0],32);
ASetVoiceVolume(hVoice[1],32);
ASetVoicePanning(hVoice[0],0);
ASetVoicePanning(hVoice[1],255);
AStartVoice(hVoice[0]);
AStartVoice(hVoice[1]);
}
else
{
ASetVoiceVolume(hVoice[0],64);
ASetVoicePanning(hVoice[0],128);
AStartVoice(hVoice[0]);
}
#endif
#ifdef USE_ALLEGRO
mysample = create_sample(16,stereo,nominal_sample_rate,audio_buffer_length);
if (mysample == 0) return 0;
myvoice = allocate_voice(mysample);
voice_set_playmode(myvoice,PLAYMODE_LOOP);
if (stereo)
{
INT16 *buf = mysample->data;
int p = 0;
while (p != audio_buffer_length)
{
buf[2*p] = (INT16)0x8000;
buf[2*p+1] = (INT16)0x8000;
p++;
}
}
else
{
INT16 *buf = mysample->data;
int p = 0;
while (p != audio_buffer_length)
{
buf[p] = (INT16)0x8000;
p++;
}
}
voice_start(myvoice);
#endif
stream_playing = 1;
voice_pos = 0;
return samples_this_frame;
}
