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Add codecs to librbcodec.

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Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>
This commit is contained in:
Sean Bartell 2011-06-25 21:32:25 -04:00 • committed by Nils Wallménius
parent a0009907de
commit f40bfc9267
757 changed files with 122 additions and 122 deletions
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89
lib/rbcodec/codecs/libgme/hes_apu_adpcm.h Normal file
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// Turbo Grafx 16 (PC Engine) ADPCM sound chip emulator
// Game_Music_Emu 0.6-pre
#ifndef HES_APU_ADPCM_H
#define HES_APU_ADPCM_H
#include "blargg_source.h"
#include "blargg_common.h"
#include "blip_buffer.h"
enum { adpcm_amp_range = 2048 };
enum { adpcm_osc_count = 1 }; // 0 <= chan < osc_count
// Registers are at io_addr to io_addr+io_size-1
enum { adpcm_io_addr = 0x1800 };
enum { adpcm_io_size = 0x400 };
struct State
{
byte pcmbuf [0x10000];
byte port [0x10];
int ad_sample;
int ad_ref_index;
bool ad_low_nibble;
int freq;
unsigned short addr;
unsigned short writeptr;
unsigned short readptr;
unsigned short playptr;
byte playflag;
byte repeatflag;
int length;
int playlength;
int playedsamplecount;
int volume;
int fadetimer;
int fadecount;
};
struct Hes_Apu_Adpcm {
struct State state;
struct Blip_Synth synth;
struct Blip_Buffer* output;
blip_time_t last_time;
int next_timer;
int last_amp;
};
// Init HES adpcm sound chip
void Adpcm_init( struct Hes_Apu_Adpcm* this );
// Rest HES adpcm sound chip
void Adpcm_reset( struct Hes_Apu_Adpcm* this );
// Sets buffer(s) to generate sound into, or 0 to mute. If only center is not 0,
// output is mono.
static inline void Adpcm_set_output( struct Hes_Apu_Adpcm* this, int chan, struct Blip_Buffer* center, struct Blip_Buffer* left, struct Blip_Buffer* right )
{
// Must be silent (all NULL), mono (left and right NULL), or stereo (none NULL)
require( !center || (center && !left && !right) || (center && left && right) );
require( (unsigned) chan < adpcm_osc_count ); // fails if you pass invalid osc index
#if defined(ROCKBOX)
(void) chan;
#endif
if ( !center || !left || !right )
{
left = center;
right = center;
}
this->output = center;
}
// Emulates to time t, then writes data to addr
void Adpcm_write_data( struct Hes_Apu_Adpcm* this, blip_time_t t, int addr, int data );
// Emulates to time t, then reads from addr
int Adpcm_read_data( struct Hes_Apu_Adpcm* this, blip_time_t t, int addr );
// Emulates to time t, then subtracts t from the current time.
// OK if previous write call had time slightly after t.
void Adpcm_end_frame( struct Hes_Apu_Adpcm* this,blip_time_t t );
// Sets overall volume, where 1.0 is normal
static inline void Adpcm_volume( struct Hes_Apu_Adpcm* this, int v ) { Synth_volume( &this->synth, (v*3)/5 / adpcm_osc_count / adpcm_amp_range ); }
#endif