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Diffstat (limited to 'plugins/gme/Game_Music_Emu-0.5.2/gme/Multi_Buffer.cpp')
| -rw-r--r-- | plugins/gme/Game_Music_Emu-0.5.2/gme/Multi_Buffer.cpp | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/plugins/gme/Game_Music_Emu-0.5.2/gme/Multi_Buffer.cpp b/plugins/gme/Game_Music_Emu-0.5.2/gme/Multi_Buffer.cpp deleted file mode 100644 index ecd8f8ad..00000000 --- a/plugins/gme/Game_Music_Emu-0.5.2/gme/Multi_Buffer.cpp +++ /dev/null @@ -1,232 +0,0 @@ -// Blip_Buffer 0.4.1. http://www.slack.net/~ant/ - -#include "Multi_Buffer.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 - -Multi_Buffer::Multi_Buffer( int spf ) : samples_per_frame_( spf ) -{ - length_ = 0; - sample_rate_ = 0; - channels_changed_count_ = 1; -} - -blargg_err_t Multi_Buffer::set_channel_count( int ) { return 0; } - -// Silent_Buffer - -Silent_Buffer::Silent_Buffer() : Multi_Buffer( 1 ) // 0 channels would probably confuse -{ - // TODO: better to use empty Blip_Buffer so caller never has to check for NULL? - chan.left = 0; - chan.center = 0; - chan.right = 0; -} - -// Mono_Buffer - -Mono_Buffer::Mono_Buffer() : Multi_Buffer( 1 ) -{ - chan.center = &buf; - chan.left = &buf; - chan.right = &buf; -} - -Mono_Buffer::~Mono_Buffer() { } - -blargg_err_t Mono_Buffer::set_sample_rate( long rate, int msec ) -{ - RETURN_ERR( buf.set_sample_rate( rate, msec ) ); - return Multi_Buffer::set_sample_rate( buf.sample_rate(), buf.length() ); -} - -// Stereo_Buffer - -Stereo_Buffer::Stereo_Buffer() : Multi_Buffer( 2 ) -{ - chan.center = &bufs [0]; - chan.left = &bufs [1]; - chan.right = &bufs [2]; -} - -Stereo_Buffer::~Stereo_Buffer() { } - -blargg_err_t Stereo_Buffer::set_sample_rate( long rate, int msec ) -{ - for ( int i = 0; i < buf_count; i++ ) - RETURN_ERR( bufs [i].set_sample_rate( rate, msec ) ); - return Multi_Buffer::set_sample_rate( bufs [0].sample_rate(), bufs [0].length() ); -} - -void Stereo_Buffer::clock_rate( long rate ) -{ - for ( int i = 0; i < buf_count; i++ ) - bufs [i].clock_rate( rate ); -} - -void Stereo_Buffer::bass_freq( int bass ) -{ - for ( unsigned i = 0; i < buf_count; i++ ) - bufs [i].bass_freq( bass ); -} - -void Stereo_Buffer::clear() -{ - stereo_added = 0; - was_stereo = false; - for ( int i = 0; i < buf_count; i++ ) - bufs [i].clear(); -} - -void Stereo_Buffer::end_frame( blip_time_t clock_count ) -{ - stereo_added = 0; - for ( unsigned i = 0; i < buf_count; i++ ) - { - stereo_added |= bufs [i].clear_modified() << i; - bufs [i].end_frame( clock_count ); - } -} - -long Stereo_Buffer::read_samples( blip_sample_t* out, long count ) -{ - require( !(count & 1) ); // count must be even - count = (unsigned) count / 2; - - long avail = bufs [0].samples_avail(); - if ( count > avail ) - count = avail; - if ( count ) - { - int bufs_used = stereo_added | was_stereo; - //dprintf( "%X\n", bufs_used ); - if ( bufs_used <= 1 ) - { - mix_mono( out, count ); - bufs [0].remove_samples( count ); - bufs [1].remove_silence( count ); - bufs [2].remove_silence( count ); - } - else if ( bufs_used & 1 ) - { - mix_stereo( out, count ); - bufs [0].remove_samples( count ); - bufs [1].remove_samples( count ); - bufs [2].remove_samples( count ); - } - else - { - mix_stereo_no_center( out, count ); - bufs [0].remove_silence( count ); - bufs [1].remove_samples( count ); - bufs [2].remove_samples( count ); - } - - // to do: this might miss opportunities for optimization - if ( !bufs [0].samples_avail() ) - { - was_stereo = stereo_added; - stereo_added = 0; - } - } - - return count * 2; -} - -void Stereo_Buffer::mix_stereo( blip_sample_t* out_, blargg_long count ) -{ - blip_sample_t* BLIP_RESTRICT out = out_; - int const bass = BLIP_READER_BASS( bufs [1] ); - BLIP_READER_BEGIN( left, bufs [1] ); - BLIP_READER_BEGIN( right, bufs [2] ); - BLIP_READER_BEGIN( center, bufs [0] ); - - for ( ; count; --count ) - { - int c = BLIP_READER_READ( center ); - blargg_long l = c + BLIP_READER_READ( left ); - blargg_long r = c + BLIP_READER_READ( right ); - if ( (BOOST::int16_t) l != l ) - l = 0x7FFF - (l >> 24); - - BLIP_READER_NEXT( center, bass ); - if ( (BOOST::int16_t) r != r ) - r = 0x7FFF - (r >> 24); - - BLIP_READER_NEXT( left, bass ); - BLIP_READER_NEXT( right, bass ); - - out [0] = l; - out [1] = r; - out += 2; - } - - BLIP_READER_END( center, bufs [0] ); - BLIP_READER_END( right, bufs [2] ); - BLIP_READER_END( left, bufs [1] ); -} - -void Stereo_Buffer::mix_stereo_no_center( blip_sample_t* out_, blargg_long count ) -{ - blip_sample_t* BLIP_RESTRICT out = out_; - int const bass = BLIP_READER_BASS( bufs [1] ); - BLIP_READER_BEGIN( left, bufs [1] ); - BLIP_READER_BEGIN( right, bufs [2] ); - - for ( ; count; --count ) - { - blargg_long l = BLIP_READER_READ( left ); - if ( (BOOST::int16_t) l != l ) - l = 0x7FFF - (l >> 24); - - blargg_long r = BLIP_READER_READ( right ); - if ( (BOOST::int16_t) r != r ) - r = 0x7FFF - (r >> 24); - - BLIP_READER_NEXT( left, bass ); - BLIP_READER_NEXT( right, bass ); - - out [0] = l; - out [1] = r; - out += 2; - } - - BLIP_READER_END( right, bufs [2] ); - BLIP_READER_END( left, bufs [1] ); -} - -void Stereo_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( center, bufs [0] ); - - for ( ; count; --count ) - { - blargg_long s = BLIP_READER_READ( center ); - if ( (BOOST::int16_t) s != s ) - s = 0x7FFF - (s >> 24); - - BLIP_READER_NEXT( center, bass ); - out [0] = s; - out [1] = s; - out += 2; - } - - BLIP_READER_END( center, bufs [0] ); -} |