static int
MaxPlaySamples(ULONG mode_id, ULONG mix_freq, ULONG player_freq) {
int rc = RETURN_OK;
struct AHIAudioCtrl* actrl = AHI_AllocAudio(AHIA_AudioID, mode_id,
AHIA_MixFreq, mix_freq,
AHIA_PlayerFreq, player_freq << 16,
AHIA_MinPlayerFreq, player_freq << 16,
AHIA_MaxPlayerFreq, player_freq << 16,
AHIA_Channels, 1,
AHIA_Sounds, 1,
TAG_DONE);
if (actrl != NULL) {
ULONG max_play_samples = 0;
if (AHI_GetAudioAttrs(AHI_INVALID_ID, actrl,
AHIDB_MaxPlaySamples, &max_play_samples,
TAG_DONE)) {
fprintf(stderr,
"MaxPlaySamples for mode 0x%08lx (Fsample = %ld Hz, Fplayer = %ld Hz) is %ld\n",
mode_id, mix_freq, player_freq, max_play_samples);
}
else {
fprintf(stderr, "Unable to get MaxPlaySamples.\n");
rc = RETURN_ERROR;
}
AHI_FreeAudio(actrl);
}
else {
fprintf(stderr, "Unable to allocate audio.\n");
rc = RETURN_ERROR;
}
return rc;
}
VOID DispatcherThread(struct MOSWriteHandle* h)
{
struct MsgPort* ahi_port = NULL;
struct AHIRequest* ahi_request = NULL;
struct AHIAudioCtrl*ahi_control = NULL;
BYTE* sample_bufs = NULL;
ULONG sample_size = 2;
BYTE ahi_device = -1;
LONG switch_sig_bit = -1;
LONG locked_buf = -1;
struct DispatcherStartupMsg *startup_msg;
struct DispatcherInitReport *init_report;
struct MsgPort *task_port = NULL;
struct ExecBase *SysBase = *(struct ExecBase **) 4;
init_report = (struct DispatcherInitReport *) AllocVec(sizeof (struct DispatcherInitReport), MEMF_PUBLIC | MEMF_CLEAR);
if (init_report == NULL)
return;
NewGetTaskAttrsA(NULL, &task_port, sizeof (task_port), TASKINFOTYPE_TASKMSGPORT, NULL);
NewGetTaskAttrsA(NULL, &startup_msg, sizeof (startup_msg), TASKINFOTYPE_STARTUPMSG, NULL);
if (task_port == NULL || startup_msg == NULL)
{
FreeVec(init_report);
return;
}
startup_msg->dsm_Result = -1;
switch_sig_bit = AllocSignal(-1);
if (switch_sig_bit != -1 && (ahi_port = CreateMsgPort()))
{
if ((ahi_request = (struct AHIRequest *) CreateIORequest(ahi_port, sizeof (struct AHIRequest))))
{
ahi_request->ahir_Version = 4;
if ((ahi_device = OpenDevice(AHINAME, AHI_NO_UNIT, (struct IORequest *) ahi_request, 0)) == 0)
{
AHIBase = (struct Library*) ahi_request->ahir_Std.io_Device;
/*dprintf("AllocAudio with %d channels, %d sounds and frequency %d\n", h->wh_Channels, AHI_BUFFERS, h->wh_Frequency);*/
ahi_control = AHI_AllocAudio(AHIA_AudioID, AHI_DEFAULT_ID,
AHIA_Channels, h->wh_Channels,
AHIA_Sounds, AHI_BUFFERS,
AHIA_MixFreq, h->wh_Frequency,
AHIA_SoundFunc, (ULONG) &OpenAL_SoundHook,
AHIA_UserData, (ULONG) h,
TAG_DONE
);
if (ahi_control)
{
ULONG buf_size;
ULONG samples, fs, fm;
AHI_GetAudioAttrs(AHI_INVALID_ID, ahi_control, AHIDB_MaxPlaySamples, (ULONG) &samples, TAG_DONE);
AHI_ControlAudio(ahi_control, AHIC_MixFreq_Query, (ULONG) &fm, TAG_DONE);
fs = h->wh_Frequency;
buf_size = samples*fs/fm;
/*dprintf("OpenAL: Minimum buffer size is %d, requested buffer size is %d\n", buf_size, h->wh_BufSize);*/
if (buf_size > h->wh_BufSize)
h->wh_BufSize = buf_size;
sample_bufs = AllocVec(h->wh_BufSize*AHI_BUFFERS, MEMF_PUBLIC | MEMF_CLEAR);
if (sample_bufs)
{
struct Buffer* bn;
ULONG buf;
LONG err = AHIE_OK;
sample_size = AHI_SampleFrameSize(h->wh_SampleType);
for (buf = 0; buf < AHI_BUFFERS && err == AHIE_OK; buf++)
{
bn = &h->wh_Buffers[buf];
bn->bn_SampleNo = buf;
bn->bn_SampleInfo.ahisi_Type = h->wh_SampleType;
bn->bn_SampleInfo.ahisi_Address = &sample_bufs[buf*h->wh_BufSize];
bn->bn_SampleInfo.ahisi_Length = h->wh_BufSize/sample_size;
InitSemaphore(&bn->bn_Semaphore);
bn->bn_FillSize = 0;
err = AHI_LoadSound(buf, AHIST_DYNAMICSAMPLE, &bn->bn_SampleInfo, ahi_control);
}
if (err != AHIE_OK)
{
FreeVec(sample_bufs);
sample_bufs = NULL;
}
}
}
}
}
}
if (sample_bufs)
{
BOOL dispatcher_running = TRUE;
ULONG signal_mask = 1 << task_port->mp_SigBit;
ULONG signal_set;
struct MsgPort *reply_port;
reply_port = CreateMsgPort();
if (reply_port == NULL)
reply_port = task_port;
if (startup_msg)
startup_msg->dsm_Result = 0;
init_report->dir_Msg.mn_Node.ln_Type = NT_MESSAGE;
init_report->dir_Msg.mn_ReplyPort = reply_port;
init_report->dir_Msg.mn_Length = sizeof (struct DispatcherInitReport);
AHI_ControlAudio(ahi_control, AHIC_MixFreq_Query, (ULONG) &init_report->dir_RealFrequency, TAG_DONE);
init_report->dir_RealBufSize = h->wh_BufSize;
PutMsg(startup_msg->dsm_Msg.mn_ReplyPort, (struct Message*) init_report);
WaitPort(reply_port);
GetMsg(reply_port);
FreeVec(init_report);
init_report = NULL;
if (reply_port != task_port)
DeleteMsgPort(reply_port);
h->wh_SwitchSignal = 1UL << switch_sig_bit;
h->wh_ReadBuf = 0;
while (dispatcher_running)
{
signal_set = Wait(signal_mask);
if (signal_set & (1 << task_port->mp_SigBit))
{
struct DispatcherMsg *msg;
while ((msg = (struct DispatcherMsg *) GetMsg(task_port)))
{
if (msg->dm_Msg.mn_Length == sizeof (struct DispatcherMsg))
{
switch (msg->dm_Command)
{
case DISPATCHER_CMD_START:
{
/*
* First buffer has been filled and we were previously not
* playing any sound yet
*/
ULONG chan;
ULONG cur_buf;
cur_buf = h->wh_ReadBuf;
AHI_ControlAudio(ahi_control, AHIC_Play, TRUE, TAG_DONE);
/* Lock first audio buffer */
ObtainSemaphore(&h->wh_Buffers[cur_buf].bn_Semaphore);
locked_buf = cur_buf;
for (chan = 0; chan < h->wh_Channels; chan++)
{
AHI_SetFreq(chan, h->wh_Frequency, ahi_control, AHISF_IMM);
AHI_SetVol(chan, 0x10000L, -0x8000L, ahi_control, AHISF_IMM);
AHI_SetSound(chan, cur_buf, 0, 0, ahi_control, AHISF_IMM);
}
Wait(1 << switch_sig_bit);
cur_buf++;
if (cur_buf >= AHI_BUFFERS)
cur_buf = 0;
h->wh_ReadBuf = cur_buf;
signal_mask |= 1UL << switch_sig_bit;
break;
}
case DISPATCHER_CMD_PAUSE:
case DISPATCHER_CMD_RESUME:
AHI_ControlAudio(ahi_control, AHIC_Play, msg->dm_Command == DISPATCHER_CMD_RESUME, TAG_DONE);
break;
case DISPATCHER_CMD_BREAK:
/* Break requests and quit */
/*dprintf("Dispatcher thread: break requested\n");*/
AHI_ControlAudio(ahi_control, AHIC_Play, FALSE, TAG_DONE);
dispatcher_running = FALSE;
break;
}
}
ReplyMsg((struct Message *) msg);
}
}
if (signal_set & (1UL << switch_sig_bit))
{
/* Switch to next read buffer */
ULONG cur_buf;
cur_buf = h->wh_ReadBuf;
/*dprintf("Dispatcher thread: buffer switch requested. Releasing lock on %d, locking %d\n", locked_buf, cur_buf);*/
memset(h->wh_Buffers[locked_buf].bn_SampleInfo.ahisi_Address, 0, h->wh_BufSize);
ReleaseSemaphore(&h->wh_Buffers[locked_buf].bn_Semaphore);
cur_buf++;
if (cur_buf >= AHI_BUFFERS)
cur_buf = 0;
ObtainSemaphore(&h->wh_Buffers[cur_buf].bn_Semaphore);
locked_buf = cur_buf;
h->wh_ReadBuf = cur_buf;
/*dprintf("Dispatcher thread: buffer switch done\n");*/
}
}
}
/* Cleanup */
if (init_report)
{
FreeVec(init_report);
init_report = NULL;
}
if (locked_buf != -1)
{
ReleaseSemaphore(&h->wh_Buffers[locked_buf].bn_Semaphore);
locked_buf = -1;
}
if (switch_sig_bit != -1)
{
FreeSignal(switch_sig_bit);
switch_sig_bit = -1;
}
if (ahi_control)
{
AHI_FreeAudio(ahi_control); /* Also unloads all sounds */
ahi_control = NULL;
}
if (ahi_request)
{
CloseDevice((struct IORequest*) ahi_request);
DeleteIORequest((struct IORequest*) ahi_request);
ahi_request = NULL;
ahi_device = -1;
}
if (sample_bufs)
{
FreeVec(sample_bufs);
sample_bufs = NULL;
}
if (ahi_port)
{
DeleteMsgPort(ahi_port);
ahi_port = NULL;
}
}
BOOL PlaySound( struct AHIUnitPrefs* prefs )
{
struct AHIAudioCtrl* actrl;
BOOL rc = FALSE;
actrl = AHI_AllocAudio( AHIA_AudioID, prefs->ahiup_AudioMode,
AHIA_MixFreq, prefs->ahiup_Frequency,
AHIA_Channels, max( prefs->ahiup_Channels, 1 ),
AHIA_Sounds, 1,
TAG_DONE );
if( actrl != NULL )
{
BYTE* sample;
int length = 48000/440;
struct AHISampleInfo sound;
sample = AllocVec( length, MEMF_PUBLIC );
if( sample != NULL )
{
int i;
for( i = 0; i < length; ++i )
{
sample[ i ] = 127 * sin( i * 2 * M_PI / length );
}
sound.ahisi_Type = AHIST_M8S;
sound.ahisi_Address = sample;
sound.ahisi_Length = length;
if( AHI_LoadSound( 0, AHIST_SAMPLE, &sound, actrl ) == AHIE_OK )
{
if( AHI_ControlAudio( actrl, AHIC_Play, TRUE,
AHIC_MonitorVolume, prefs->ahiup_MonitorVolume,
AHIC_InputGain, prefs->ahiup_InputGain,
AHIC_OutputVolume, prefs->ahiup_OutputVolume,
AHIC_Input, prefs->ahiup_Input,
AHIC_Output, prefs->ahiup_Output,
TAG_DONE ) == AHIE_OK )
{
AHI_Play( actrl, AHIP_BeginChannel, 0,
AHIP_Freq, 48000,
AHIP_Vol, 0x10000,
AHIP_Pan, 0x8000,
AHIP_Sound, 0,
AHIP_EndChannel, NULL,
TAG_DONE );
Delay( 50 );
AHI_Play( actrl, AHIP_BeginChannel, 0,
AHIP_Sound, AHI_NOSOUND,
AHIP_EndChannel, NULL,
TAG_DONE );
// Give the anti-click code a break ...
Delay( 1 );
AHI_ControlAudio( actrl, AHIC_Play, FALSE,
TAG_DONE );
}
AHI_UnloadSound( 0, actrl );
}
FreeVec( sample );
}
AHI_FreeAudio( actrl );
}
return rc;
}
int
PlaySineEverywhere( void ) {
int rc = RETURN_OK;
int sine_length = 44100 / 100;
BYTE* sine_m8s;
BYTE* sine_s8s;
WORD* sine_s16s;
WORD* sine_m16s;
LONG* sine_s32s;
LONG* sine_m32s;
sine_m8s = AllocVec( 1 * sizeof( BYTE ) * sine_length, MEMF_ANY | MEMF_PUBLIC );
sine_s8s = AllocVec( 2 * sizeof( BYTE ) * sine_length, MEMF_ANY | MEMF_PUBLIC );
sine_m16s = AllocVec( 1 * sizeof( WORD ) * sine_length, MEMF_ANY | MEMF_PUBLIC );
sine_s16s = AllocVec( 2 * sizeof( WORD ) * sine_length, MEMF_ANY | MEMF_PUBLIC );
sine_m32s = AllocVec( 1 * sizeof( LONG ) * sine_length, MEMF_ANY | MEMF_PUBLIC );
sine_s32s = AllocVec( 2 * sizeof( LONG ) * sine_length, MEMF_ANY | MEMF_PUBLIC );
if( sine_m8s != NULL &&
sine_s8s != NULL &&
sine_m16s != NULL &&
sine_s16s != NULL &&
sine_m32s != NULL &&
sine_s32s != NULL ) {
ULONG mode = AHI_INVALID_ID;
int i;
for( i = 0; i < sine_length; ++i ) {
double value = sin( i * 2 * M_PI / sine_length );
sine_m8s[ i ] = (BYTE) ( SCHAR_MAX * value );
sine_m16s[ i ] = (WORD) ( SHRT_MAX * value );
sine_m32s[ i ] = (LONG) ( LONG_MAX * value );
sine_s8s[ i * 2 + 0 ] = (BYTE) ( SCHAR_MAX * value );
sine_s8s[ i * 2 + 1 ] = (BYTE) ( SCHAR_MAX * value );
sine_s16s[ i * 2 + 0 ] = (WORD) ( SHRT_MAX * value );
sine_s16s[ i * 2 + 1 ] = (WORD) ( SHRT_MAX * value );
sine_s32s[ i * 2 + 0 ] = (LONG) ( LONG_MAX * value );
sine_s32s[ i * 2 + 1 ] = (LONG) ( LONG_MAX * value );
}
while( rc == RETURN_OK &&
( mode = AHI_NextAudioID( mode ) ) != AHI_INVALID_ID ) {
struct AHIAudioCtrl* actrl;
char name[ 64 ];
struct Hook sound_hook = {
{ NULL, NULL },
HookEntry,
(HOOKFUNC) SoundFunc,
FindTask( NULL )
};
AHI_GetAudioAttrs( mode, NULL,
AHIDB_Name, (ULONG) &name,
AHIDB_BufferLen, 64,
TAG_DONE );
printf( "Mode 0x%08lx: %s\n", mode, name );
actrl = AHI_AllocAudio( AHIA_AudioID, mode,
AHIA_MixFreq, 44100,
AHIA_Channels, 1,
AHIA_Sounds, 6,
AHIA_SoundFunc, (ULONG) &sound_hook,
AHIA_UserData, 0,
TAG_DONE );
if( actrl != NULL ) {
struct AHISampleInfo sample_m8s = { AHIST_M8S, sine_m8s, sine_length };
struct AHISampleInfo sample_s8s = { AHIST_S8S, sine_s8s, sine_length };
struct AHISampleInfo sample_m16s = { AHIST_M16S, sine_m16s, sine_length };
struct AHISampleInfo sample_s16s = { AHIST_S16S, sine_s16s, sine_length };
struct AHISampleInfo sample_m32s = { AHIST_M32S, sine_m32s, sine_length };
struct AHISampleInfo sample_s32s = { AHIST_S32S, sine_s32s, sine_length };
if( AHI_LoadSound( 0, AHIST_SAMPLE, &sample_m8s, actrl) == AHIE_OK &&
AHI_LoadSound( 1, AHIST_SAMPLE, &sample_s8s, actrl) == AHIE_OK &&
AHI_LoadSound( 2, AHIST_SAMPLE, &sample_m16s, actrl) == AHIE_OK &&
AHI_LoadSound( 3, AHIST_SAMPLE, &sample_s16s, actrl) == AHIE_OK &&
AHI_LoadSound( 4, AHIST_SAMPLE, &sample_m32s, actrl) == AHIE_OK &&
AHI_LoadSound( 5, AHIST_SAMPLE, &sample_s32s, actrl) == AHIE_OK ) {
AHI_Play( actrl,
AHIP_BeginChannel, 0,
AHIP_Sound, 0,
AHIP_Freq, 44100,
AHIP_Vol, 0x10000,
AHIP_Pan, 0x00000,
AHIP_EndChannel, 0,
TAG_DONE );
// Now, when everything is "armed", lets start processing.
SetSignal( 0, SIGF_SINGLE );
if( AHI_ControlAudio( actrl,
AHIC_Play, TRUE,
TAG_DONE ) == AHIE_OK ) {
Wait( SIGF_SINGLE );
AHI_ControlAudio( actrl,
AHIC_Play, FALSE,
TAG_DONE );
}
else {
fprintf( stderr, "Unable start playback.\n" );
rc = RETURN_ERROR;
}
// AHI_FreeAudio() will unload the sounds
}
else {
fprintf( stderr, "Unable load sound.\n" );
rc = RETURN_ERROR;
}
AHI_FreeAudio( actrl );
}
else {
fprintf( stderr, "Unable to allocate audio.\n" );
rc = RETURN_ERROR;
}
}
}
else {
fprintf( stderr, "Unable to allocate memory for sine\n" );
}
FreeVec( sine_m8s );
FreeVec( sine_s8s );
FreeVec( sine_s16s );
FreeVec( sine_m16s );
FreeVec( sine_s32s );
FreeVec( sine_m32s );
return rc;
}
