forked from len0rd/rockbox
Submit initial patch from FS#12176. Adds support for several new game music formats (AY, GBS, HES, KSS, SGC, VGM and VGZ) and replaces the current NSF and NSFE with a new implementation based on a port of the Game Music Emu library 'GME'. This first submit does not cover the full functionality provided by the author's original patch: Coleco-SGV is not supported, some GME-specific m3u-support has been removed and IRAM is not used yet. Further changes are very likely to follow this submit. Thanks to Mauricio Garrido.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30264 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andree Buschmann
parent
93c6f1329a
commit
acb0917556
149 changed files with 33133 additions and 4431 deletions
226
apps/codecs/libgme/multi_buffer.c
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226
apps/codecs/libgme/multi_buffer.c
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// Blip_Buffer 0.4.1. http://www.slack.net/~ant/
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#include "multi_buffer.h"
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/* Copyright (C) 2003-2006 Shay Green. This module is free software; you
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can redistribute it and/or modify it under the terms of the GNU Lesser
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General Public License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version. This
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module is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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details. You should have received a copy of the GNU Lesser General Public
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License along with this module; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
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#include "blargg_source.h"
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#ifdef BLARGG_ENABLE_OPTIMIZER
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#include BLARGG_ENABLE_OPTIMIZER
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#endif
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// Stereo_Buffer
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void Buffer_init( struct Stereo_Buffer* this )
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{
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Blip_init( &this->bufs [0] );
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Blip_init( &this->bufs [1] );
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Blip_init( &this->bufs [2] );
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this->chan.center = &this->bufs [0];
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this->chan.left = &this->bufs [1];
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this->chan.right = &this->bufs [2];
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this->length_ = 0;
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this->sample_rate_ = 0;
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this->channels_changed_count_ = 1;
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this->samples_per_frame_ = 2;
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}
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blargg_err_t Buffer_set_sample_rate( struct Stereo_Buffer* this, long rate, int msec )
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{
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int i;
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for ( i = 0; i < buf_count; i++ )
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RETURN_ERR( Blip_set_sample_rate( &this->bufs[i], rate, msec ) );
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this->sample_rate_ = Blip_sample_rate( &this->bufs [0] );
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this->length_ = Blip_length( &this->bufs [0] );
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return 0;
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}
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void Buffer_clock_rate( struct Stereo_Buffer* this, long rate )
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{
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int i;
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for ( i = 0; i < buf_count; i++ )
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Blip_set_clock_rate( &this->bufs [i], rate );
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}
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void Buffer_bass_freq( struct Stereo_Buffer* this, int bass )
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{
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unsigned i;
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for ( i = 0; i < buf_count; i++ )
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Blip_bass_freq( &this->bufs [i], bass );
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}
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struct channel_t Buffer_channel( struct Stereo_Buffer* this )
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{
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return this->chan;
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}
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void Buffer_clear( struct Stereo_Buffer* this )
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{
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this->stereo_added = 0;
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this->was_stereo = false;
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int i;
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for ( i = 0; i < buf_count; i++ )
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Blip_clear( &this->bufs [i], 1 );
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}
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void Buffer_end_frame( struct Stereo_Buffer* this, blip_time_t clock_count )
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{
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this->stereo_added = 0;
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unsigned i;
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for ( i = 0; i < buf_count; i++ )
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{
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this->stereo_added |= Blip_clear_modified( &this->bufs [i] ) << i;
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Blip_end_frame( &this->bufs [i], clock_count );
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}
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}
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long Buffer_read_samples( struct Stereo_Buffer* this, blip_sample_t* out, long count )
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{
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require( !(count & 1) ); // count must be even
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count = (unsigned) count / 2;
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long avail = Blip_samples_avail( &this->bufs [0] );
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if ( count > avail )
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count = avail;
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if ( count )
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{
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int bufs_used = this->stereo_added | this->was_stereo;
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//dprintf( "%X\n", bufs_used );
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if ( bufs_used <= 1 )
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{
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Buffer_mix_mono( this, out, count );
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Blip_remove_samples( &this->bufs [0], count );
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Blip_remove_silence( &this->bufs [1], count );
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Blip_remove_silence( &this->bufs [2], count );
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}
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else if ( bufs_used & 1 )
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{
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Buffer_mix_stereo( this, out, count );
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Blip_remove_samples( &this->bufs [0], count );
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Blip_remove_samples( &this->bufs [1], count );
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Blip_remove_samples( &this->bufs [2], count );
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}
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else
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{
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Buffer_mix_stereo_no_center( this, out, count );
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Blip_remove_silence( &this->bufs [0], count );
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Blip_remove_samples( &this->bufs [1], count );
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Blip_remove_samples( &this->bufs [2], count );
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}
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// to do: this might miss opportunities for optimization
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if ( !Blip_samples_avail( &this->bufs [0] ) )
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{
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this->was_stereo = this->stereo_added;
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this->stereo_added = 0;
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}
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}
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return count * 2;
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}
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unsigned Buffer_channels_changed_count( struct Stereo_Buffer* this )
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{
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return this->channels_changed_count_;
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}
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void Buffer_channels_changed( struct Stereo_Buffer* this )
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{
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this->channels_changed_count_++;
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}
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void Buffer_mix_stereo( struct Stereo_Buffer* this, blip_sample_t* out_, blargg_long count )
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{
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blip_sample_t* BLIP_RESTRICT out = out_;
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int const bass = BLIP_READER_BASS( this->bufs [1] );
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BLIP_READER_BEGIN( left, this->bufs [1] );
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BLIP_READER_BEGIN( right, this->bufs [2] );
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BLIP_READER_BEGIN( center, this->bufs [0] );
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for ( ; count; --count )
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{
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int c = BLIP_READER_READ( center );
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blargg_long l = c + BLIP_READER_READ( left );
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blargg_long r = c + BLIP_READER_READ( right );
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if ( (int16_t) l != l )
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l = 0x7FFF - (l >> 24);
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BLIP_READER_NEXT( center, bass );
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if ( (int16_t) r != r )
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r = 0x7FFF - (r >> 24);
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BLIP_READER_NEXT( left, bass );
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BLIP_READER_NEXT( right, bass );
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out [0] = l;
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out [1] = r;
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out += 2;
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}
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BLIP_READER_END( center, this->bufs [0] );
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BLIP_READER_END( right, this->bufs [2] );
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BLIP_READER_END( left, this->bufs [1] );
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}
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void Buffer_mix_stereo_no_center( struct Stereo_Buffer* this, blip_sample_t* out_, blargg_long count )
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{
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blip_sample_t* BLIP_RESTRICT out = out_;
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int const bass = BLIP_READER_BASS( this->bufs [1] );
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BLIP_READER_BEGIN( left, this->bufs [1] );
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BLIP_READER_BEGIN( right, this->bufs [2] );
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for ( ; count; --count )
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{
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blargg_long l = BLIP_READER_READ( left );
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if ( (int16_t) l != l )
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l = 0x7FFF - (l >> 24);
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blargg_long r = BLIP_READER_READ( right );
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if ( (int16_t) r != r )
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r = 0x7FFF - (r >> 24);
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BLIP_READER_NEXT( left, bass );
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BLIP_READER_NEXT( right, bass );
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out [0] = l;
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out [1] = r;
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out += 2;
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}
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BLIP_READER_END( right, this->bufs [2] );
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BLIP_READER_END( left, this->bufs [1] );
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}
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void Buffer_mix_mono( struct Stereo_Buffer* this, blip_sample_t* out_, blargg_long count )
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{
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blip_sample_t* BLIP_RESTRICT out = out_;
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int const bass = BLIP_READER_BASS( this->bufs [0] );
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BLIP_READER_BEGIN( center, this->bufs [0] );
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for ( ; count; --count )
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{
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blargg_long s = BLIP_READER_READ( center );
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if ( (int16_t) s != s )
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s = 0x7FFF - (s >> 24);
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BLIP_READER_NEXT( center, bass );
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out [0] = s;
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out [1] = s;
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out += 2;
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}
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BLIP_READER_END( center, this->bufs [0] );
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}
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