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-rw-r--r--apps/codecs/libgme/hes_emu.c644
1 files changed, 0 insertions, 644 deletions
diff --git a/apps/codecs/libgme/hes_emu.c b/apps/codecs/libgme/hes_emu.c
deleted file mode 100644
index d6bafea334..0000000000
--- a/apps/codecs/libgme/hes_emu.c
+++ /dev/null
@@ -1,644 +0,0 @@
-// Game_Music_Emu 0.5.2. http://www.slack.net/~ant/
-
-#include "hes_emu.h"
-
-#include "blargg_endian.h"
-#include "blargg_source.h"
-
-/* Copyright (C) 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 */
-
-int const timer_mask = 0x04;
-int const vdp_mask = 0x02;
-int const i_flag_mask = 0x04;
-int const unmapped = 0xFF;
-
-int const period_60hz = 262 * 455; // scanlines * clocks per scanline
-
-const char gme_wrong_file_type [] = "Wrong file type for this emulator";
-
-static void clear_track_vars( struct Hes_Emu* this )
-{
- this->current_track_ = -1;
- track_stop( &this->track_filter );
-}
-
-void Hes_init( struct Hes_Emu* this )
-{
- this->sample_rate_ = 0;
- this->mute_mask_ = 0;
- this->tempo_ = (int)(FP_ONE_TEMPO);
-
- // defaults
- this->tfilter = *track_get_setup( &this->track_filter );
- this->tfilter.max_initial = 2;
- this->tfilter.lookahead = 6;
- this->track_filter.silence_ignored_ = false;
-
- this->timer.raw_load = 0;
- Sound_set_gain( this, (int)(FP_ONE_GAIN*1.11) );
-
- Rom_init( &this->rom, 0x2000 );
-
- Apu_init( &this->apu );
- Adpcm_init( &this->adpcm );
- Cpu_init( &this->cpu );
-
- /* Set default track count */
- this->track_count = 255;
-
- // clears fields
- this->voice_count_ = 0;
- this->voice_types_ = 0;
- clear_track_vars( this );
-}
-
-static blargg_err_t check_hes_header( void const* header )
-{
- if ( memcmp( header, "HESM", 4 ) )
- return gme_wrong_file_type;
- return 0;
-}
-
-// Setup
-
-blargg_err_t Hes_load_mem( struct Hes_Emu* this, void* data, long size )
-{
- // Unload
- this->voice_count_ = 0;
- this->track_count = 255;
- this->m3u.size = 0;
- clear_track_vars( this );
-
- assert( offsetof (struct header_t,unused [4]) == header_size );
- RETURN_ERR( Rom_load( &this->rom, data, size, header_size, &this->header, unmapped ) );
-
- RETURN_ERR( check_hes_header( this->header.tag ) );
-
- /* if ( header_.vers != 0 )
- warning( "Unknown file version" );
-
- if ( memcmp( header_.data_tag, "DATA", 4 ) )
- warning( "Data header missing" );
-
- if ( memcmp( header_.unused, "\0\0\0\0", 4 ) )
- warning( "Unknown header data" ); */
-
- // File spec supports multiple blocks, but I haven't found any, and
- // many files have bad sizes in the only block, so it's simpler to
- // just try to load the damn data as best as possible.
-
- int addr = get_le32( this->header.addr );
- /* int rom_size = get_le32( this->header.size ); */
- int const rom_max = 0x100000;
- if ( (unsigned) addr >= (unsigned) rom_max )
- {
- /* warning( "Invalid address" ); */
- addr &= rom_max - 1;
- }
- /* if ( (unsigned) (addr + size) > (unsigned) rom_max )
- warning( "Invalid size" );
-
- if ( rom_size != rom.file_size() )
- {
- if ( size <= rom.file_size() - 4 && !memcmp( rom.begin() + size, "DATA", 4 ) )
- warning( "Multiple DATA not supported" );
- else if ( size < rom.file_size() )
- warning( "Extra file data" );
- else
- warning( "Missing file data" );
- } */
-
- Rom_set_addr( &this->rom, addr );
-
- this->voice_count_ = osc_count + adpcm_osc_count;
- static int const types [osc_count + adpcm_osc_count] = {
- wave_type+0, wave_type+1, wave_type+2, wave_type+3, mixed_type+0, mixed_type+1, mixed_type+2
- };
- this->voice_types_ = types;
-
- Apu_volume( &this->apu, this->gain_ );
- Adpcm_volume( &this->adpcm, this->gain_ );
-
- // Setup buffer
- this->clock_rate_ = 7159091;
- Buffer_clock_rate( &this->stereo_buf, 7159091 );
- RETURN_ERR( Buffer_set_channel_count( &this->stereo_buf, this->voice_count_, this->voice_types_ ) );
- this->buf_changed_count = Buffer_channels_changed_count( &this->stereo_buf );
-
- Sound_set_tempo( this, this->tempo_ );
- Sound_mute_voices( this, this->mute_mask_ );
-
- return 0;
-}
-
-// Emulation
-
-static void recalc_timer_load( struct Hes_Emu* this )
-{
- this->timer.load = this->timer.raw_load * this->timer_base + 1;
-}
-
-// Hardware
-
-void run_until( struct Hes_Emu* this, hes_time_t present )
-{
- while ( this->vdp.next_vbl < present )
- this->vdp.next_vbl += this->play_period;
-
- hes_time_t elapsed = present - this->timer.last_time;
- if ( elapsed > 0 )
- {
- if ( this->timer.enabled )
- {
- this->timer.count -= elapsed;
- if ( this->timer.count <= 0 )
- this->timer.count += this->timer.load;
- }
- this->timer.last_time = present;
- }
-}
-
-void write_vdp( struct Hes_Emu* this, int addr, int data )
-{
- switch ( addr )
- {
- case 0:
- this->vdp.latch = data & 0x1F;
- break;
-
- case 2:
- if ( this->vdp.latch == 5 )
- {
- /* if ( data & 0x04 )
- warning( "Scanline interrupt unsupported" ); */
- run_until( this, Cpu_time( &this->cpu ) );
- this->vdp.control = data;
- irq_changed( this );
- }
- /* else
- {
- dprintf( "VDP not supported: $%02X <- $%02X\n", vdp.latch, data );
- } */
- break;
-
- case 3:
- /* dprintf( "VDP MSB not supported: $%02X <- $%02X\n", vdp.latch, data ); */
- break;
- }
-}
-
-void write_mem_( struct Hes_Emu* this, hes_addr_t addr, int data )
-{
- hes_time_t time = Cpu_time( &this->cpu );
- if ( (unsigned) (addr - apu_io_addr) < apu_io_size )
- {
- // Avoid going way past end when a long block xfer is writing to I/O space.
- // Not a problem for other registers below because they don't write to
- // Blip_Buffer.
- hes_time_t t = min( time, Cpu_end_time( &this->cpu ) + 8 );
- Apu_write_data( &this->apu, t, addr, data );
- return;
- }
- if ( (unsigned) (addr - adpcm_io_addr) < adpcm_io_size )
- {
- hes_time_t t = min( time, Cpu_end_time( &this->cpu ) + 6 );
- Adpcm_write_data( &this->adpcm, t, addr, data );
- return;
- }
-
- switch ( addr )
- {
- case 0x0000:
- case 0x0002:
- case 0x0003:
- write_vdp( this, addr, data );
- return;
-
- case 0x0C00: {
- run_until( this, time );
- this->timer.raw_load = (data & 0x7F) + 1;
- recalc_timer_load( this );
- this->timer.count = this->timer.load;
- break;
- }
-
- case 0x0C01:
- data &= 1;
- if ( this->timer.enabled == data )
- return;
- run_until( this, time );
- this->timer.enabled = data;
- if ( data )
- this->timer.count = this->timer.load;
- break;
-
- case 0x1402:
- run_until( this, time );
- this->irq.disables = data;
- /* if ( (data & 0xF8) && (data & 0xF8) != 0xF8 ) // flag questionable values
- dprintf( "Int mask: $%02X\n", data ); */
- break;
-
- case 0x1403:
- run_until( this, time );
- if ( this->timer.enabled )
- this->timer.count = this->timer.load;
- this->timer.fired = false;
- break;
-
-#ifndef NDEBUG
- case 0x1000: // I/O port
- case 0x0402: // palette
- case 0x0403:
- case 0x0404:
- case 0x0405:
- return;
-
- default:
- /* dprintf( "unmapped write $%04X <- $%02X\n", addr, data ); */
- return;
-#endif
- }
-
- irq_changed( this );
-}
-
-int read_mem_( struct Hes_Emu* this, hes_addr_t addr )
-{
- hes_time_t time = Cpu_time( &this->cpu );
- addr &= page_size - 1;
- switch ( addr )
- {
- case 0x0000:
- if ( this->irq.vdp > time )
- return 0;
- this->irq.vdp = future_time;
- run_until( this, time );
- irq_changed( this );
- return 0x20;
-
- /* case 0x0002:
- case 0x0003:
- dprintf( "VDP read not supported: %d\n", addr );
- return 0; */
-
- case 0x0C01:
- //return timer.enabled; // TODO: remove?
- case 0x0C00:
- run_until( this, time );
- /* dprintf( "Timer count read\n" ); */
- return (unsigned) (this->timer.count - 1) / this->timer_base;
-
- case 0x1402:
- return this->irq.disables;
-
- case 0x1403:
- {
- int status = 0;
- if ( this->irq.timer <= time ) status |= timer_mask;
- if ( this->irq.vdp <= time ) status |= vdp_mask;
- return status;
- }
-
- case 0x180A:
- case 0x180B:
- case 0x180C:
- case 0x180D:
- return Adpcm_read_data( &this->adpcm, time, addr );
-
- #ifndef NDEBUG
- case 0x1000: // I/O port
- //case 0x180C: // CD-ROM
- //case 0x180D:
- break;
-
- /* default:
- dprintf( "unmapped read $%04X\n", addr ); */
- #endif
- }
-
- return unmapped;
-}
-
-void irq_changed( struct Hes_Emu* this )
-{
- hes_time_t present = Cpu_time( &this->cpu );
-
- if ( this->irq.timer > present )
- {
- this->irq.timer = future_time;
- if ( this->timer.enabled && !this->timer.fired )
- this->irq.timer = present + this->timer.count;
- }
-
- if ( this->irq.vdp > present )
- {
- this->irq.vdp = future_time;
- if ( this->vdp.control & 0x08 )
- this->irq.vdp = this->vdp.next_vbl;
- }
-
- hes_time_t time = future_time;
- if ( !(this->irq.disables & timer_mask) ) time = this->irq.timer;
- if ( !(this->irq.disables & vdp_mask) ) time = min( time, this->irq.vdp );
-
- Cpu_set_irq_time( &this->cpu, time );
-}
-
-int cpu_done( struct Hes_Emu* this )
-{
- check( Cpu_time( &this->cpu ) >= Cpu_end_time( &this->cpu ) ||
- (!(this->cpu.r.flags & i_flag_mask) && Cpu_time( &this->cpu ) >= Cpu_irq_time( &this->cpu )) );
-
- if ( !(this->cpu.r.flags & i_flag_mask) )
- {
- hes_time_t present = Cpu_time( &this->cpu );
-
- if ( this->irq.timer <= present && !(this->irq.disables & timer_mask) )
- {
- this->timer.fired = true;
- this->irq.timer = future_time;
- irq_changed( this ); // overkill, but not worth writing custom code
- return 0x0A;
- }
-
- if ( this->irq.vdp <= present && !(this->irq.disables & vdp_mask) )
- {
- // work around for bugs with music not acknowledging VDP
- //run_until( present );
- //irq.vdp = cpu.future_time;
- //irq_changed();
- return 0x08;
- }
- }
- return -1;
-}
-
-static void adjust_time( hes_time_t* time, hes_time_t delta )
-{
- if ( *time < future_time )
- {
- *time -= delta;
- if ( *time < 0 )
- *time = 0;
- }
-}
-
-static blargg_err_t end_frame( struct Hes_Emu* this, hes_time_t duration )
-{
- /* if ( run_cpu( this, duration ) )
- warning( "Emulation error (illegal instruction)" ); */
- run_cpu( this, duration );
-
- check( Cpu_time( &this->cpu ) >= duration );
- //check( time() - duration < 20 ); // Txx instruction could cause going way over
-
- run_until( this, duration );
-
- // end time frame
- this->timer.last_time -= duration;
- this->vdp.next_vbl -= duration;
- Cpu_end_frame( &this->cpu, duration );
- adjust_time( &this->irq.timer, duration );
- adjust_time( &this->irq.vdp, duration );
- Apu_end_frame( &this->apu, duration );
- Adpcm_end_frame( &this->adpcm, duration );
-
- return 0;
-}
-
-static blargg_err_t run_clocks( struct Hes_Emu* this, blip_time_t* duration_ )
-{
- return end_frame( this, *duration_ );
-}
-
-blargg_err_t play_( void *emu, int count, sample_t out [] )
-{
- struct Hes_Emu* this = (struct Hes_Emu*) emu;
-
- int remain = count;
- while ( remain )
- {
- Buffer_disable_immediate_removal( &this->stereo_buf );
- remain -= Buffer_read_samples( &this->stereo_buf, &out [count - remain], remain );
- if ( remain )
- {
- if ( this->buf_changed_count != Buffer_channels_changed_count( &this->stereo_buf ) )
- {
- this->buf_changed_count = Buffer_channels_changed_count( &this->stereo_buf );
-
- // Remute voices
- Sound_mute_voices( this, this->mute_mask_ );
- }
- int msec = Buffer_length( &this->stereo_buf );
- blip_time_t clocks_emulated = msec * this->clock_rate_ / 1000 - 100;
- RETURN_ERR( run_clocks( this, &clocks_emulated ) );
- assert( clocks_emulated );
- Buffer_end_frame( &this->stereo_buf, clocks_emulated );
- }
- }
- return 0;
-}
-
-// Music emu
-
-blargg_err_t Hes_set_sample_rate( struct Hes_Emu* this, int rate )
-{
- require( !this->sample_rate_ ); // sample rate can't be changed once set
- Buffer_init( &this->stereo_buf );
- RETURN_ERR( Buffer_set_sample_rate( &this->stereo_buf, rate, 1000 / 20 ) );
-
- // Set bass frequency
- Buffer_bass_freq( &this->stereo_buf, 60 );
-
- this->sample_rate_ = rate;
- RETURN_ERR( track_init( &this->track_filter, this ) );
- this->tfilter.max_silence = 6 * stereo * this->sample_rate_;
- return 0;
-}
-
-void Sound_mute_voice( struct Hes_Emu* this, int index, bool mute )
-{
- require( (unsigned) index < (unsigned) this->voice_count_ );
- int bit = 1 << index;
- int mask = this->mute_mask_ | bit;
- if ( !mute )
- mask ^= bit;
- Sound_mute_voices( this, mask );
-}
-
-void Sound_mute_voices( struct Hes_Emu* this, int mask )
-{
- require( this->sample_rate_ ); // sample rate must be set first
- this->mute_mask_ = mask;
-
- // Set adpcm voice
- struct channel_t ch = Buffer_channel( &this->stereo_buf, this->voice_count_ );
- if ( mask & (1 << this->voice_count_ ) )
- Adpcm_set_output( &this->adpcm, 0, 0, 0, 0 );
- else
- Adpcm_set_output( &this->adpcm, 0, ch.center, ch.left, ch.right );
-
- // Set apu voices
- int i = this->voice_count_ - 1;
- for ( ; i--; )
- {
- if ( mask & (1 << i) )
- {
- Apu_osc_output( &this->apu, i, 0, 0, 0 );
- }
- else
- {
- struct channel_t ch = Buffer_channel( &this->stereo_buf, i );
- assert( (ch.center && ch.left && ch.right) ||
- (!ch.center && !ch.left && !ch.right) ); // all or nothing
- Apu_osc_output( &this->apu, i, ch.center, ch.left, ch.right );
- }
- }
-}
-
-void Sound_set_tempo( struct Hes_Emu* this, int t )
-{
- require( this->sample_rate_ ); // sample rate must be set first
- int const min = (int)(FP_ONE_TEMPO*0.02);
- int const max = (int)(FP_ONE_TEMPO*4.00);
- if ( t < min ) t = min;
- if ( t > max ) t = max;
- this->play_period = (hes_time_t) ((period_60hz*FP_ONE_TEMPO) / t);
- this->timer_base = (int) ((1024*FP_ONE_TEMPO) / t);
- recalc_timer_load( this );
- this->tempo_ = t;
-}
-
-blargg_err_t Hes_start_track( struct Hes_Emu* this, int track )
-{
- clear_track_vars( this );
-
- // Remap track if playlist available
- if ( this->m3u.size > 0 ) {
- struct entry_t* e = &this->m3u.entries[track];
- track = e->track;
- }
-
- this->current_track_ = track;
-
- Buffer_clear( &this->stereo_buf );
-
- memset( this->ram, 0, sizeof this->ram ); // some HES music relies on zero fill
- memset( this->sgx, 0, sizeof this->sgx );
-
- Apu_reset( &this->apu );
- Adpcm_reset( &this->adpcm );
- Cpu_reset( &this->cpu );
-
- unsigned i;
- for ( i = 0; i < sizeof this->header.banks; i++ )
- set_mmr( this, i, this->header.banks [i] );
- set_mmr( this, page_count, 0xFF ); // unmapped beyond end of address space
-
- this->irq.disables = timer_mask | vdp_mask;
- this->irq.timer = future_time;
- this->irq.vdp = future_time;
-
- this->timer.enabled = false;
- this->timer.raw_load= 0x80;
- this->timer.count = this->timer.load;
- this->timer.fired = false;
- this->timer.last_time = 0;
-
- this->vdp.latch = 0;
- this->vdp.control = 0;
- this->vdp.next_vbl = 0;
-
- this->ram [0x1FF] = (idle_addr - 1) >> 8;
- this->ram [0x1FE] = (idle_addr - 1) & 0xFF;
- this->cpu.r.sp = 0xFD;
- this->cpu.r.pc = get_le16( this->header.init_addr );
- this->cpu.r.a = track;
-
- recalc_timer_load( this );
-
- // convert filter times to samples
- struct setup_t s = this->tfilter;
- s.max_initial *= this->sample_rate_ * stereo;
- #ifdef GME_DISABLE_SILENCE_LOOKAHEAD
- s.lookahead = 1;
- #endif
- track_setup( &this->track_filter, &s );
-
- return track_start( &this->track_filter );
-}
-
-// Tell/Seek
-
-static int msec_to_samples( int msec, int sample_rate )
-{
- int sec = msec / 1000;
- msec -= sec * 1000;
- return (sec * sample_rate + msec * sample_rate / 1000) * stereo;
-}
-
-int Track_tell( struct Hes_Emu* this )
-{
- int rate = this->sample_rate_ * stereo;
- int sec = track_sample_count( &this->track_filter ) / rate;
- return sec * 1000 + (track_sample_count( &this->track_filter ) - sec * rate) * 1000 / rate;
-}
-
-blargg_err_t Track_seek( struct Hes_Emu* this, int msec )
-{
- int time = msec_to_samples( msec, this->sample_rate_ );
- if ( time < track_sample_count( &this->track_filter ) )
- RETURN_ERR( Hes_start_track( this, this->current_track_ ) );
- return Track_skip( this, time - track_sample_count( &this->track_filter ) );
-}
-
-blargg_err_t skip_( void* emu, int count )
-{
- struct Hes_Emu* this = (struct Hes_Emu*) emu;
-
- // for long skip, mute sound
- const int threshold = 32768;
- if ( count > threshold )
- {
- int saved_mute = this->mute_mask_;
- Sound_mute_voices( this, ~0 );
-
- int n = count - threshold/2;
- n &= ~(2048-1); // round to multiple of 2048
- count -= n;
- RETURN_ERR( skippy_( &this->track_filter, n ) );
-
- Sound_mute_voices( this, saved_mute );
- }
-
- return skippy_( &this->track_filter, count );
-}
-
-blargg_err_t Track_skip( struct Hes_Emu* this, int count )
-{
- require( this->current_track_ >= 0 ); // start_track() must have been called already
- return track_skip( &this->track_filter, count );
-}
-
-void Track_set_fade( struct Hes_Emu* this, int start_msec, int length_msec )
-{
- track_set_fade( &this->track_filter, msec_to_samples( start_msec, this->sample_rate_ ),
- length_msec * this->sample_rate_ / (1000 / stereo) );
-}
-
-blargg_err_t Hes_play( struct Hes_Emu* this, int out_count, sample_t* out )
-{
- require( this->current_track_ >= 0 );
- require( out_count % stereo == 0 );
- return track_play( &this->track_filter, out_count, out );
-}
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