diff options
Diffstat (limited to 'plugins/gme/game-music-emu-svn/gme/Effects_Buffer.cpp')
| -rw-r--r-- | plugins/gme/game-music-emu-svn/gme/Effects_Buffer.cpp | 529 |
1 files changed, 0 insertions, 529 deletions
diff --git a/plugins/gme/game-music-emu-svn/gme/Effects_Buffer.cpp b/plugins/gme/game-music-emu-svn/gme/Effects_Buffer.cpp deleted file mode 100644 index 181b11e9..00000000 --- a/plugins/gme/game-music-emu-svn/gme/Effects_Buffer.cpp +++ /dev/null @@ -1,529 +0,0 @@ -// Game_Music_Emu 0.5.5. http://www.slack.net/~ant/ - -#include "Effects_Buffer.h" - -#include <string.h> - -/* Copyright (C) 2003-2006 Shay Green. This module is free software; you -can redistribute it and/or modify it under the terms of the GNU Lesser -General Public License as published by the Free Software Foundation; either -version 2.1 of the License, or (at your option) any later version. This -module is distributed in the hope that it will be useful, but WITHOUT ANY -WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS -FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more -details. You should have received a copy of the GNU Lesser General Public -License along with this module; if not, write to the Free Software Foundation, -Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ - -#include "blargg_source.h" - -#ifdef BLARGG_ENABLE_OPTIMIZER - #include BLARGG_ENABLE_OPTIMIZER -#endif - -typedef blargg_long fixed_t; - -#define TO_FIXED( f ) fixed_t ((f) * (1L << 15) + 0.5) -#define FMUL( x, y ) (((x) * (y)) >> 15) - -const unsigned echo_size = 4096; -const unsigned echo_mask = echo_size - 1; -BOOST_STATIC_ASSERT( (echo_size & echo_mask) == 0 ); // must be power of 2 - -const unsigned reverb_size = 8192 * 2; -const unsigned reverb_mask = reverb_size - 1; -BOOST_STATIC_ASSERT( (reverb_size & reverb_mask) == 0 ); // must be power of 2 - -Effects_Buffer::config_t::config_t() -{ - pan_1 = -0.15f; - pan_2 = 0.15f; - reverb_delay = 88.0f; - reverb_level = 0.12f; - echo_delay = 61.0f; - echo_level = 0.10f; - delay_variance = 18.0f; - effects_enabled = false; -} - -void Effects_Buffer::set_depth( double d ) -{ - float f = (float) d; - config_t c; - c.pan_1 = -0.6f * f; - c.pan_2 = 0.6f * f; - c.reverb_delay = 880 * 0.1f; - c.echo_delay = 610 * 0.1f; - if ( f > 0.5 ) - f = 0.5; // TODO: more linear reduction of extreme reverb/echo - c.reverb_level = 0.5f * f; - c.echo_level = 0.30f * f; - c.delay_variance = 180 * 0.1f; - c.effects_enabled = (d > 0.0f); - config( c ); -} - -Effects_Buffer::Effects_Buffer( bool center_only ) : Multi_Buffer( 2 ) -{ - buf_count = center_only ? max_buf_count - 4 : max_buf_count; - - echo_pos = 0; - reverb_pos = 0; - - stereo_remain = 0; - effect_remain = 0; - effects_enabled = false; - set_depth( 0 ); -} - -Effects_Buffer::~Effects_Buffer() { } - -blargg_err_t Effects_Buffer::set_sample_rate( long rate, int msec ) -{ - if ( !echo_buf.size() ) - RETURN_ERR( echo_buf.resize( echo_size ) ); - - if ( !reverb_buf.size() ) - RETURN_ERR( reverb_buf.resize( reverb_size ) ); - - for ( int i = 0; i < buf_count; i++ ) - RETURN_ERR( bufs [i].set_sample_rate( rate, msec ) ); - - config( config_ ); - clear(); - - return Multi_Buffer::set_sample_rate( bufs [0].sample_rate(), bufs [0].length() ); -} - -void Effects_Buffer::clock_rate( long rate ) -{ - for ( int i = 0; i < buf_count; i++ ) - bufs [i].clock_rate( rate ); -} - -void Effects_Buffer::bass_freq( int freq ) -{ - for ( int i = 0; i < buf_count; i++ ) - bufs [i].bass_freq( freq ); -} - -void Effects_Buffer::clear() -{ - stereo_remain = 0; - effect_remain = 0; - if ( echo_buf.size() ) - memset( &echo_buf [0], 0, echo_size * sizeof echo_buf [0] ); - - if ( reverb_buf.size() ) - memset( &reverb_buf [0], 0, reverb_size * sizeof reverb_buf [0] ); - - for ( int i = 0; i < buf_count; i++ ) - bufs [i].clear(); -} - -inline int pin_range( int n, int max, int min = 0 ) -{ - if ( n < min ) - return min; - if ( n > max ) - return max; - return n; -} - -void Effects_Buffer::config( const config_t& cfg ) -{ - channels_changed(); - - // clear echo and reverb buffers - if ( !config_.effects_enabled && cfg.effects_enabled && echo_buf.size() ) - { - memset( &echo_buf [0], 0, echo_size * sizeof echo_buf [0] ); - memset( &reverb_buf [0], 0, reverb_size * sizeof reverb_buf [0] ); - } - - config_ = cfg; - - if ( config_.effects_enabled ) - { - // convert to internal format - - chans.pan_1_levels [0] = TO_FIXED( 1 ) - TO_FIXED( config_.pan_1 ); - chans.pan_1_levels [1] = TO_FIXED( 2 ) - chans.pan_1_levels [0]; - - chans.pan_2_levels [0] = TO_FIXED( 1 ) - TO_FIXED( config_.pan_2 ); - chans.pan_2_levels [1] = TO_FIXED( 2 ) - chans.pan_2_levels [0]; - - chans.reverb_level = TO_FIXED( config_.reverb_level ); - chans.echo_level = TO_FIXED( config_.echo_level ); - - int delay_offset = int (1.0 / 2000 * config_.delay_variance * sample_rate()); - - int reverb_sample_delay = int (1.0 / 1000 * config_.reverb_delay * sample_rate()); - chans.reverb_delay_l = pin_range( reverb_size - - (reverb_sample_delay - delay_offset) * 2, reverb_size - 2, 0 ); - chans.reverb_delay_r = pin_range( reverb_size + 1 - - (reverb_sample_delay + delay_offset) * 2, reverb_size - 1, 1 ); - - int echo_sample_delay = int (1.0 / 1000 * config_.echo_delay * sample_rate()); - chans.echo_delay_l = pin_range( echo_size - 1 - (echo_sample_delay - delay_offset), - echo_size - 1 ); - chans.echo_delay_r = pin_range( echo_size - 1 - (echo_sample_delay + delay_offset), - echo_size - 1 ); - - chan_types [0].center = &bufs [0]; - chan_types [0].left = &bufs [3]; - chan_types [0].right = &bufs [4]; - - chan_types [1].center = &bufs [1]; - chan_types [1].left = &bufs [3]; - chan_types [1].right = &bufs [4]; - - chan_types [2].center = &bufs [2]; - chan_types [2].left = &bufs [5]; - chan_types [2].right = &bufs [6]; - assert( 2 < chan_types_count ); - } - else - { - // set up outputs - for ( unsigned i = 0; i < chan_types_count; i++ ) - { - channel_t& c = chan_types [i]; - c.center = &bufs [0]; - c.left = &bufs [1]; - c.right = &bufs [2]; - } - } - - if ( buf_count < max_buf_count ) - { - for ( int i = 0; i < chan_types_count; i++ ) - { - channel_t& c = chan_types [i]; - c.left = c.center; - c.right = c.center; - } - } -} - -Effects_Buffer::channel_t Effects_Buffer::channel( int i, int type ) -{ - int out = 2; - if ( !type ) - { - out = i % 5; - if ( out > 2 ) - out = 2; - } - else if ( !(type & noise_type) && (type & type_index_mask) % 3 != 0 ) - { - out = type & 1; - } - return chan_types [out]; -} - -void Effects_Buffer::end_frame( blip_time_t clock_count ) -{ - int bufs_used = 0; - for ( int i = 0; i < buf_count; i++ ) - { - bufs_used |= bufs [i].clear_modified() << i; - bufs [i].end_frame( clock_count ); - } - - int stereo_mask = (config_.effects_enabled ? 0x78 : 0x06); - if ( (bufs_used & stereo_mask) && buf_count == max_buf_count ) - stereo_remain = bufs [0].samples_avail() + bufs [0].output_latency(); - - if ( effects_enabled || config_.effects_enabled ) - effect_remain = bufs [0].samples_avail() + bufs [0].output_latency(); - - effects_enabled = config_.effects_enabled; -} - -long Effects_Buffer::samples_avail() const -{ - return bufs [0].samples_avail() * 2; -} - -long Effects_Buffer::read_samples( blip_sample_t* out, long total_samples ) -{ - require( total_samples % 2 == 0 ); // count must be even - - long remain = bufs [0].samples_avail(); - if ( remain > (total_samples >> 1) ) - remain = (total_samples >> 1); - total_samples = remain; - while ( remain ) - { - int active_bufs = buf_count; - long count = remain; - - // optimizing mixing to skip any channels which had nothing added - if ( effect_remain ) - { - if ( count > effect_remain ) - count = effect_remain; - - if ( stereo_remain ) - { - mix_enhanced( out, count ); - } - else - { - mix_mono_enhanced( out, count ); - active_bufs = 3; - } - } - else if ( stereo_remain ) - { - mix_stereo( out, count ); - active_bufs = 3; - } - else - { - mix_mono( out, count ); - active_bufs = 1; - } - - out += count * 2; - remain -= count; - - stereo_remain -= count; - if ( stereo_remain < 0 ) - stereo_remain = 0; - - effect_remain -= count; - if ( effect_remain < 0 ) - effect_remain = 0; - - for ( int i = 0; i < buf_count; i++ ) - { - if ( i < active_bufs ) - bufs [i].remove_samples( count ); - else - bufs [i].remove_silence( count ); // keep time synchronized - } - } - - return total_samples * 2; -} - -void Effects_Buffer::mix_mono( blip_sample_t* out_, blargg_long count ) -{ - blip_sample_t* BLIP_RESTRICT out = out_; - int const bass = BLIP_READER_BASS( bufs [0] ); - BLIP_READER_BEGIN( c, bufs [0] ); - - // unrolled loop - for ( blargg_long n = count >> 1; n; --n ) - { - blargg_long cs0 = BLIP_READER_READ( c ); - BLIP_READER_NEXT( c, bass ); - - blargg_long cs1 = BLIP_READER_READ( c ); - BLIP_READER_NEXT( c, bass ); - - if ( (BOOST::int16_t) cs0 != cs0 ) - cs0 = 0x7FFF - (cs0 >> 24); - ((BOOST::uint32_t*) out) [0] = ((BOOST::uint16_t) cs0) | (cs0 << 16); - - if ( (BOOST::int16_t) cs1 != cs1 ) - cs1 = 0x7FFF - (cs1 >> 24); - ((BOOST::uint32_t*) out) [1] = ((BOOST::uint16_t) cs1) | (cs1 << 16); - out += 4; - } - - if ( count & 1 ) - { - int s = BLIP_READER_READ( c ); - BLIP_READER_NEXT( c, bass ); - out [0] = s; - out [1] = s; - if ( (BOOST::int16_t) s != s ) - { - s = 0x7FFF - (s >> 24); - out [0] = s; - out [1] = s; - } - } - - BLIP_READER_END( c, bufs [0] ); -} - -void Effects_Buffer::mix_stereo( blip_sample_t* out_, blargg_long count ) -{ - blip_sample_t* BLIP_RESTRICT out = out_; - int const bass = BLIP_READER_BASS( bufs [0] ); - BLIP_READER_BEGIN( c, bufs [0] ); - BLIP_READER_BEGIN( l, bufs [1] ); - BLIP_READER_BEGIN( r, bufs [2] ); - - while ( count-- ) - { - int cs = BLIP_READER_READ( c ); - BLIP_READER_NEXT( c, bass ); - int left = cs + BLIP_READER_READ( l ); - int right = cs + BLIP_READER_READ( r ); - BLIP_READER_NEXT( l, bass ); - BLIP_READER_NEXT( r, bass ); - - if ( (BOOST::int16_t) left != left ) - left = 0x7FFF - (left >> 24); - - out [0] = left; - out [1] = right; - - out += 2; - - if ( (BOOST::int16_t) right != right ) - out [-1] = 0x7FFF - (right >> 24); - } - - BLIP_READER_END( r, bufs [2] ); - BLIP_READER_END( l, bufs [1] ); - BLIP_READER_END( c, bufs [0] ); -} - -void Effects_Buffer::mix_mono_enhanced( blip_sample_t* out_, blargg_long count ) -{ - blip_sample_t* BLIP_RESTRICT out = out_; - int const bass = BLIP_READER_BASS( bufs [2] ); - BLIP_READER_BEGIN( center, bufs [2] ); - BLIP_READER_BEGIN( sq1, bufs [0] ); - BLIP_READER_BEGIN( sq2, bufs [1] ); - - blip_sample_t* const reverb_buf = this->reverb_buf.begin(); - blip_sample_t* const echo_buf = this->echo_buf.begin(); - int echo_pos = this->echo_pos; - int reverb_pos = this->reverb_pos; - - while ( count-- ) - { - int sum1_s = BLIP_READER_READ( sq1 ); - int sum2_s = BLIP_READER_READ( sq2 ); - - BLIP_READER_NEXT( sq1, bass ); - BLIP_READER_NEXT( sq2, bass ); - - int new_reverb_l = FMUL( sum1_s, chans.pan_1_levels [0] ) + - FMUL( sum2_s, chans.pan_2_levels [0] ) + - reverb_buf [(reverb_pos + chans.reverb_delay_l) & reverb_mask]; - - int new_reverb_r = FMUL( sum1_s, chans.pan_1_levels [1] ) + - FMUL( sum2_s, chans.pan_2_levels [1] ) + - reverb_buf [(reverb_pos + chans.reverb_delay_r) & reverb_mask]; - - fixed_t reverb_level = chans.reverb_level; - reverb_buf [reverb_pos] = (blip_sample_t) FMUL( new_reverb_l, reverb_level ); - reverb_buf [reverb_pos + 1] = (blip_sample_t) FMUL( new_reverb_r, reverb_level ); - reverb_pos = (reverb_pos + 2) & reverb_mask; - - int sum3_s = BLIP_READER_READ( center ); - BLIP_READER_NEXT( center, bass ); - - int left = new_reverb_l + sum3_s + FMUL( chans.echo_level, - echo_buf [(echo_pos + chans.echo_delay_l) & echo_mask] ); - int right = new_reverb_r + sum3_s + FMUL( chans.echo_level, - echo_buf [(echo_pos + chans.echo_delay_r) & echo_mask] ); - - echo_buf [echo_pos] = sum3_s; - echo_pos = (echo_pos + 1) & echo_mask; - - if ( (BOOST::int16_t) left != left ) - left = 0x7FFF - (left >> 24); - - out [0] = left; - out [1] = right; - - out += 2; - - if ( (BOOST::int16_t) right != right ) - out [-1] = 0x7FFF - (right >> 24); - } - this->reverb_pos = reverb_pos; - this->echo_pos = echo_pos; - - BLIP_READER_END( sq1, bufs [0] ); - BLIP_READER_END( sq2, bufs [1] ); - BLIP_READER_END( center, bufs [2] ); -} - -void Effects_Buffer::mix_enhanced( blip_sample_t* out_, blargg_long count ) -{ - blip_sample_t* BLIP_RESTRICT out = out_; - int const bass = BLIP_READER_BASS( bufs [2] ); - BLIP_READER_BEGIN( center, bufs [2] ); - BLIP_READER_BEGIN( l1, bufs [3] ); - BLIP_READER_BEGIN( r1, bufs [4] ); - BLIP_READER_BEGIN( l2, bufs [5] ); - BLIP_READER_BEGIN( r2, bufs [6] ); - BLIP_READER_BEGIN( sq1, bufs [0] ); - BLIP_READER_BEGIN( sq2, bufs [1] ); - - blip_sample_t* const reverb_buf = this->reverb_buf.begin(); - blip_sample_t* const echo_buf = this->echo_buf.begin(); - int echo_pos = this->echo_pos; - int reverb_pos = this->reverb_pos; - - while ( count-- ) - { - int sum1_s = BLIP_READER_READ( sq1 ); - int sum2_s = BLIP_READER_READ( sq2 ); - - BLIP_READER_NEXT( sq1, bass ); - BLIP_READER_NEXT( sq2, bass ); - - int new_reverb_l = FMUL( sum1_s, chans.pan_1_levels [0] ) + - FMUL( sum2_s, chans.pan_2_levels [0] ) + BLIP_READER_READ( l1 ) + - reverb_buf [(reverb_pos + chans.reverb_delay_l) & reverb_mask]; - - int new_reverb_r = FMUL( sum1_s, chans.pan_1_levels [1] ) + - FMUL( sum2_s, chans.pan_2_levels [1] ) + BLIP_READER_READ( r1 ) + - reverb_buf [(reverb_pos + chans.reverb_delay_r) & reverb_mask]; - - BLIP_READER_NEXT( l1, bass ); - BLIP_READER_NEXT( r1, bass ); - - fixed_t reverb_level = chans.reverb_level; - reverb_buf [reverb_pos] = (blip_sample_t) FMUL( new_reverb_l, reverb_level ); - reverb_buf [reverb_pos + 1] = (blip_sample_t) FMUL( new_reverb_r, reverb_level ); - reverb_pos = (reverb_pos + 2) & reverb_mask; - - int sum3_s = BLIP_READER_READ( center ); - BLIP_READER_NEXT( center, bass ); - - int left = new_reverb_l + sum3_s + BLIP_READER_READ( l2 ) + FMUL( chans.echo_level, - echo_buf [(echo_pos + chans.echo_delay_l) & echo_mask] ); - int right = new_reverb_r + sum3_s + BLIP_READER_READ( r2 ) + FMUL( chans.echo_level, - echo_buf [(echo_pos + chans.echo_delay_r) & echo_mask] ); - - BLIP_READER_NEXT( l2, bass ); - BLIP_READER_NEXT( r2, bass ); - - echo_buf [echo_pos] = sum3_s; - echo_pos = (echo_pos + 1) & echo_mask; - - if ( (BOOST::int16_t) left != left ) - left = 0x7FFF - (left >> 24); - - out [0] = left; - out [1] = right; - - out += 2; - - if ( (BOOST::int16_t) right != right ) - out [-1] = 0x7FFF - (right >> 24); - } - this->reverb_pos = reverb_pos; - this->echo_pos = echo_pos; - - BLIP_READER_END( l1, bufs [3] ); - BLIP_READER_END( r1, bufs [4] ); - BLIP_READER_END( l2, bufs [5] ); - BLIP_READER_END( r2, bufs [6] ); - BLIP_READER_END( sq1, bufs [0] ); - BLIP_READER_END( sq2, bufs [1] ); - BLIP_READER_END( center, bufs [2] ); -} - |