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Implementing ESPCM decompression (incomplete)

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This commit is contained in:
Kagamiin~
2024-03-13 00:05:45 -03:00
parent 0ed203cbd5
commit f4c75226ef
2 changed files with 208 additions and 1 deletions
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9
src/include/86box/snd_sb_dsp.h
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@@ -9,7 +9,7 @@
#define SB_SUBTYPE_ESS_ES1688 4 /* ESS Technology ES1688 */
/* ESS-related */
#define IS_ESS(dsp) ((dsp)->sb_subtype >= SB_SUBTYPE_ESS_ES688)
#define IS_ESS(dsp) ((dsp)->sb_subtype == SB_SUBTYPE_ESS_ES688 || (dsp)->sb_subtype == SB_SUBTYPE_ESS_ES1688) /* check for future ESS cards here */
/* aztech-related */
#define IS_AZTECH(dsp) ((dsp)->sb_subtype == SB_SUBTYPE_CLONE_AZT2316A_0X11 || (dsp)->sb_subtype == SB_SUBTYPE_CLONE_AZT1605_0X0C) /* check for future AZT cards here */
@@ -148,6 +148,13 @@ typedef struct sb_dsp_t {
uint8_t ess_reload_len;
uint32_t ess_dma_counter;
// ESPCM
uint8_t espcm_sample_idx;
uint8_t espcm_range;
uint8_t espcm_byte_buffer[4];
uint8_t espcm_code_buffer[10]; /* used for ESPCM_3 */
uint8_t espcm_last_nibble; /* used for ESPCM_3 */
mpu_t *mpu;
} sb_dsp_t;