static int
sound_init_blip( Blip_Buffer **buf, Blip_Synth **synth )
{
*buf = new_Blip_Buffer();
blip_buffer_set_clock_rate( *buf, sound_get_effective_processor_speed() );
/* Allow up to 1s of playback buffer - this allows us to cope with slowing
down to 2% of speed where a single Speccy frame generates just under 1s
of sound */
if ( blip_buffer_set_sample_rate( *buf, settings_current.sound_freq, 1000 ) ) {
sound_end();
ui_error( UI_ERROR_ERROR, "out of memory at %s:%d", __FILE__, __LINE__ );
return 0;
}
*synth = new_Blip_Synth();
blip_synth_set_volume( *synth, sound_get_volume( settings_current.volume_beeper ) );
blip_synth_set_output( *synth, *buf );
blip_buffer_set_bass_freq( *buf, speaker_type[ option_enumerate_sound_speaker_type() ].bass );
blip_synth_set_treble_eq( *synth, speaker_type[ option_enumerate_sound_speaker_type() ].treble );
return 1;
}
void
sound_init( const char *device )
{
float hz;
double treble;
Blip_Synth **ay_left_synth;
Blip_Synth **ay_mid_synth;
Blip_Synth **ay_mid_synth_r;
Blip_Synth **ay_right_synth;
/* Allow sound as long as emulation speed is greater than 2%
(less than that and a single Speccy frame generates more
than a seconds worth of sound which is bigger than the
maximum Blip_Buffer of 1 second) */
if( !( !sound_enabled && settings_current.sound &&
settings_current.emulation_speed > 1 ) )
return;
/* only try for stereo if we need it */
sound_stereo_ay = option_enumerate_sound_stereo_ay();
if( settings_current.sound &&
sound_lowlevel_init( device, &settings_current.sound_freq,
&sound_stereo_ay ) )
return;
if( !sound_init_blip(&left_buf, &left_beeper_synth) ) return;
if( sound_stereo_ay != SOUND_STEREO_AY_NONE &&
!sound_init_blip(&right_buf, &right_beeper_synth) )
return;
treble = speaker_type[ option_enumerate_sound_speaker_type() ].treble;
ay_a_synth = new_Blip_Synth();
blip_synth_set_volume( ay_a_synth, sound_get_volume( settings_current.volume_ay) );
blip_synth_set_treble_eq( ay_a_synth, treble );
ay_b_synth = new_Blip_Synth();
blip_synth_set_volume( ay_b_synth, sound_get_volume( settings_current.volume_ay) );
blip_synth_set_treble_eq( ay_b_synth, treble );
ay_c_synth = new_Blip_Synth();
blip_synth_set_volume( ay_c_synth, sound_get_volume( settings_current.volume_ay) );
blip_synth_set_treble_eq( ay_c_synth, treble );
left_specdrum_synth = new_Blip_Synth();
blip_synth_set_volume( left_specdrum_synth, sound_get_volume( settings_current.volume_specdrum ) );
blip_synth_set_output( left_specdrum_synth, left_buf );
blip_synth_set_treble_eq( left_specdrum_synth, treble );
/* important to override these settings if not using stereo
* (it would probably be confusing to mess with the stereo
* settings in settings_current though, which is why we make copies
* rather than using the real ones).
*/
ay_a_synth_r = NULL;
ay_b_synth_r = NULL;
ay_c_synth_r = NULL;
if( sound_stereo_ay != SOUND_STEREO_AY_NONE ) {
/* Attach the Blip_Synth's we've already created as appropriate, and
* create one more Blip_Synth for the middle channel's right buffer. */
if( sound_stereo_ay == SOUND_STEREO_AY_ACB ) {
ay_left_synth = &ay_a_synth;
ay_mid_synth = &ay_c_synth;
ay_mid_synth_r = &ay_c_synth_r;
ay_right_synth = &ay_b_synth;
} else if ( sound_stereo_ay == SOUND_STEREO_AY_ABC ) {
ay_left_synth = &ay_a_synth;
ay_mid_synth = &ay_b_synth;
ay_mid_synth_r = &ay_b_synth_r;
ay_right_synth = &ay_c_synth;
} else {
ui_error( UI_ERROR_ERROR, "unknown AY stereo separation type: %d", sound_stereo_ay );
fuse_abort();
}
blip_synth_set_output( *ay_left_synth, left_buf );
blip_synth_set_output( *ay_mid_synth, left_buf );
blip_synth_set_output( *ay_right_synth, right_buf );
*ay_mid_synth_r = new_Blip_Synth();
blip_synth_set_volume( *ay_mid_synth_r,
sound_get_volume( settings_current.volume_ay ) );
blip_synth_set_output( *ay_mid_synth_r, right_buf );
blip_synth_set_treble_eq( *ay_mid_synth_r, treble );
right_specdrum_synth = new_Blip_Synth();
blip_synth_set_volume( right_specdrum_synth, sound_get_volume( settings_current.volume_specdrum ) );
blip_synth_set_output( right_specdrum_synth, right_buf );
blip_synth_set_treble_eq( right_specdrum_synth, treble );
} else {
blip_synth_set_output( ay_a_synth, left_buf );
blip_synth_set_output( ay_b_synth, left_buf );
blip_synth_set_output( ay_c_synth, left_buf );
}
sound_enabled = sound_enabled_ever = 1;
sound_channels = ( sound_stereo_ay != SOUND_STEREO_AY_NONE ? 2 : 1 );
/* Adjust relative processor speed to deal with adjusting sound generation
frequency against emulation speed (more flexible than adjusting generated
sample rate) */
hz = ( float )sound_get_effective_processor_speed() /
machine_current->timings.tstates_per_frame;
/* Size of audio data we will get from running a single Spectrum frame */
sound_framesiz = ( float )settings_current.sound_freq / hz;
sound_framesiz++;
samples =
(blip_sample_t *)libspectrum_calloc( sound_framesiz * sound_channels,
sizeof(blip_sample_t) );
/* initialize movie settings... */
movie_init_sound( settings_current.sound_freq, sound_stereo_ay );
}
void
sound_init( const char *device )
{
int ret;
float hz;
/* Allow sound as long as emulation speed is greater than 2%
(less than that and a single Speccy frame generates more
than a seconds worth of sound which is bigger than the
maximum Blip_Buffer of 1 second) */
if( !( !sound_enabled && settings_current.sound &&
settings_current.emulation_speed > 1 ) )
return;
sound_stereo_ay = settings_current.stereo_ay;
/* only try for stereo if we need it */
if( sound_stereo_ay )
sound_stereo = 1;
ret =
sound_lowlevel_init( device, &settings_current.sound_freq, &sound_stereo );
if( ret )
return;
if( !sound_init_blip(&left_buf, &left_beeper_synth) ) return;
if( sound_stereo && !sound_init_blip(&right_buf, &right_beeper_synth) ) return;
ay_a_synth = new_Blip_Synth();
blip_synth_set_volume( ay_a_synth, sound_get_volume( settings_current.volume_ay) );
blip_synth_set_output( ay_a_synth, left_buf );
blip_synth_set_treble_eq( ay_a_synth, speaker_type[ settings_current.speaker_type ].treble );
ay_b_synth = new_Blip_Synth();
blip_synth_set_volume( ay_b_synth, sound_get_volume( settings_current.volume_ay) );
blip_synth_set_treble_eq( ay_b_synth, speaker_type[ settings_current.speaker_type ].treble );
ay_c_synth = new_Blip_Synth();
blip_synth_set_volume( ay_c_synth, sound_get_volume( settings_current.volume_ay) );
blip_synth_set_output( ay_c_synth, left_buf );
blip_synth_set_treble_eq( ay_c_synth, speaker_type[ settings_current.speaker_type ].treble );
/* important to override these settings if not using stereo
* (it would probably be confusing to mess with the stereo
* settings in settings_current though, which is why we make copies
* rather than using the real ones).
*/
if( !sound_stereo ) {
sound_stereo_ay = 0;
}
ay_a_synth_r = NULL;
ay_b_synth_r = NULL;
ay_c_synth_r = NULL;
if( sound_stereo ) {
ay_c_synth_r = new_Blip_Synth();
blip_synth_set_volume( ay_c_synth_r, sound_get_volume( settings_current.volume_ay ) );
blip_synth_set_output( ay_c_synth_r, right_buf );
if( sound_stereo_ay ) {
/* stereo with ACB stereo. */
blip_synth_set_output( ay_b_synth, right_buf );
} else {
ay_a_synth_r = new_Blip_Synth();
blip_synth_set_volume( ay_a_synth_r, sound_get_volume( settings_current.volume_ay ) );
blip_synth_set_output( ay_a_synth_r, right_buf );
blip_synth_set_treble_eq( ay_a_synth_r, speaker_type[ settings_current.speaker_type ].treble );
blip_synth_set_output( ay_b_synth, left_buf );
ay_b_synth_r = new_Blip_Synth();
blip_synth_set_volume( ay_b_synth_r, sound_get_volume( settings_current.volume_ay ) );
blip_synth_set_output( ay_b_synth_r, right_buf );
blip_synth_set_treble_eq( ay_b_synth_r, speaker_type[ settings_current.speaker_type ].treble );
}
} else {
blip_synth_set_output( ay_b_synth, left_buf );
}
sound_enabled = sound_enabled_ever = 1;
sound_channels = ( sound_stereo ? 2 : 1 );
/* Adjust relative processor speed to deal with adjusting sound generation
frequency against emulation speed (more flexible than adjusting generated
sample rate) */
hz = ( float )sound_get_effective_processor_speed() /
machine_current->timings.tstates_per_frame;
/* Size of audio data we will get from running a single Spectrum frame */
sound_framesiz = ( float )settings_current.sound_freq / hz;
sound_framesiz++;
samples = (blip_sample_t *)calloc( sound_framesiz * sound_channels,
sizeof(blip_sample_t) );
}