long Stereo_Buffer::read_samples( blip_sample_t* out, long out_size )
{
require( (out_size & 1) == 0 ); // must read an even number of samples
out_size = min( out_size, samples_avail() );
int pair_count = int (out_size >> 1);
if ( pair_count )
{
mixer.read_pairs( out, pair_count );
if ( samples_avail() <= 0 || immediate_removal() )
{
for ( int i = bufs_size; --i >= 0; )
{
buf_t& b = bufs [i];
// TODO: might miss non-silence settling since it checks END of last read
if ( !b.non_silent() )
b.remove_silence( mixer.samples_read );
else
b.remove_samples( mixer.samples_read );
}
mixer.samples_read = 0;
}
}
return out_size;
}
long Effects_Buffer::read_samples( blip_sample_t* out, long out_size )
{
out_size = min( out_size, samples_avail() );
int pair_count = int (out_size >> 1);
require( pair_count * stereo == out_size ); // must read an even number of samples
if ( pair_count )
{
if ( no_effects )
{
mixer.read_pairs( out, pair_count );
}
else
{
int pairs_remain = pair_count;
do
{
// mix at most max_read pairs at a time
int count = max_read;
if ( count > pairs_remain )
count = pairs_remain;
if ( no_echo )
{
// optimization: clear echo here to keep mix_effects() a leaf function
echo_pos = 0;
memset( echo.begin(), 0, count * stereo * sizeof echo [0] );
}
mix_effects( out, count );
blargg_long new_echo_pos = echo_pos + count * stereo;
if ( new_echo_pos >= echo_size )
new_echo_pos -= echo_size;
echo_pos = new_echo_pos;
assert( echo_pos < echo_size );
out += count * stereo;
mixer.samples_read += count;
pairs_remain -= count;
}
while ( pairs_remain );
}
if ( samples_avail() <= 0 || immediate_removal() )
{
for ( int i = bufs_size; --i >= 0; )
{
buf_t& b = bufs [i];
// TODO: might miss non-silence settling since it checks END of last read
if ( b.non_silent() )
b.remove_samples( mixer.samples_read );
else
b.remove_silence( mixer.samples_read );
}
mixer.samples_read = 0;
}
}
return out_size;
}
long Nes_Rewinder::read_samples( short* out, long out_size )
{
int count = samples_avail();
if ( count )
{
if ( count > out_size )
{
count = out_size;
}
if ( !reverse_enabled )
{
memcpy( out, frames [current_frame].samples, count * sizeof *out );
}
else
{
int step = samples_per_frame();
for ( int i = step; i-- > 0; )
copy_reverse( frames [current_frame].samples + i, count, out + i, step );
}
if ( fade_sound_in )
{
fade_sound_in = false;
fade_samples_( out, count, 1 );
}
if ( frames [current_frame].fade_out )
{
fade_sound_in = true;
fade_samples_( out, count, -1 );
}
}
return count;
}
void Tracked_Blip_Buffer::remove_all_samples()
{
long avail = samples_avail();
if ( !non_silent() )
remove_silence( avail );
else
remove_samples( avail );
}
void Blip_Buffer::clear( int entire_buffer )
{
offset_ = 0;
reader_accum = 0;
if ( buffer_ )
{
long count = (entire_buffer ? buffer_size_ : samples_avail());
memset( buffer_, 0, (count + buffer_extra) * sizeof (buf_t_) );
}
}
void Tracked_Blip_Buffer::end_frame( blip_time_t t )
{
Blip_Buffer::end_frame( t );
if ( clear_modified() )
last_non_silence = samples_avail() + blip_buffer_extra_;
}
