devs/foxbox
1
0
Fork 0
forked from len0rd/rockbox
Code Pull requests Activity

Add codecs to librbcodec.

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

75
lib/rbcodec/codecs/libgme/resampler.h Normal file
View file

@ -0,0 +1,75 @@
// Combination of Downsampler and Blip_Buffer mixing. Used by Sega FM emulators.
// Game_Music_Emu 0.5.5
#ifndef RESAMPLER_H
#define RESAMPLER_H
#include "blargg_common.h"
#include "multi_buffer.h"
typedef short dsample_t;
enum { max_buf_size = 3960 };
enum { max_resampler_size = 5942 };
enum { write_offset = 8 * stereo };
enum { gain_bits = 14 };
struct Resampler {
int (*callback)( void*, blip_time_t, int, dsample_t* );
void* callback_data;
int sample_buffer_size;
int sample_buf_size;
int oversamples_per_frame;
int buf_pos;
int resampler_size;
int gain_;
int buffer_size;
int write_pos;
int pos;
int step;
int rate_;
dsample_t sample_buf [max_buf_size];
dsample_t buf [max_resampler_size]; // Internal resampler
};
static inline void Resampler_init( struct Resampler* this )
{
this->pos = 0;
this->write_pos = 0;
this->rate_ = 0;
this->sample_buf_size = 0;
this->sample_buffer_size = 0;
this->oversamples_per_frame = 0;
}
blargg_err_t Resampler_reset( struct Resampler* this, int max_pairs );
void Resampler_resize( struct Resampler* this, int pairs_per_frame );
void Resampler_play( struct Resampler* this, int count, dsample_t* out, struct Blip_Buffer* );
static inline void Resampler_set_callback(struct Resampler* this, int (*func)( void*, blip_time_t, int, dsample_t* ), void* user_data )
{
this->callback = func;
this->callback_data = user_data;
}
blargg_err_t Resampler_setup( struct Resampler* this, int fm_rate, int fm_gain, int rate, int gain );
static inline void Resampler_clear( struct Resampler* this )
{
this->buf_pos = this->sample_buf_size;
this->pos = 0;
this->write_pos = 0;
}
static inline int Resampler_rate( struct Resampler* this )
{
return this->rate_;
}
#endif