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Diffstat (limited to 'src/emu/sound/ymz280b.c')
-rw-r--r--src/emu/sound/ymz280b.c160
1 files changed, 79 insertions, 81 deletions
diff --git a/src/emu/sound/ymz280b.c b/src/emu/sound/ymz280b.c
index ffa6bbe56bf..33c98ef9f21 100644
--- a/src/emu/sound/ymz280b.c
+++ b/src/emu/sound/ymz280b.c
@@ -25,15 +25,15 @@
#include "ymz280b.h"
-#define MAX_SAMPLE_CHUNK 10000
-#define MAKE_WAVS 0
+#define MAX_SAMPLE_CHUNK 10000
+#define MAKE_WAVS 0
-#define FRAC_BITS 14
-#define FRAC_ONE (1 << FRAC_BITS)
-#define FRAC_MASK (FRAC_ONE - 1)
+#define FRAC_BITS 14
+#define FRAC_ONE (1 << FRAC_BITS)
+#define FRAC_MASK (FRAC_ONE - 1)
-#define INTERNAL_BUFFER_SIZE (1 << 15)
-#define INTERNAL_SAMPLE_RATE (chip->master_clock * 2.0)
+#define INTERNAL_BUFFER_SIZE (1 << 15)
+#define INTERNAL_SAMPLE_RATE (chip->master_clock * 2.0)
#if MAKE_WAVS
#include "wavwrite.h"
@@ -43,60 +43,60 @@
/* struct describing a single playing ADPCM voice */
struct YMZ280BVoice
{
- UINT8 playing; /* 1 if we are actively playing */
-
- UINT8 keyon; /* 1 if the key is on */
- UINT8 looping; /* 1 if looping is enabled */
- UINT8 mode; /* current playback mode */
- UINT16 fnum; /* frequency */
- UINT8 level; /* output level */
- UINT8 pan; /* panning */
-
- UINT32 start; /* start address, in nibbles */
- UINT32 stop; /* stop address, in nibbles */
- UINT32 loop_start; /* loop start address, in nibbles */
- UINT32 loop_end; /* loop end address, in nibbles */
- UINT32 position; /* current position, in nibbles */
-
- INT32 signal; /* current ADPCM signal */
- INT32 step; /* current ADPCM step */
-
- INT32 loop_signal; /* signal at loop start */
- INT32 loop_step; /* step at loop start */
- UINT32 loop_count; /* number of loops so far */
-
- INT32 output_left; /* output volume (left) */
- INT32 output_right; /* output volume (right) */
- INT32 output_step; /* step value for frequency conversion */
- INT32 output_pos; /* current fractional position */
- INT16 last_sample; /* last sample output */
- INT16 curr_sample; /* current sample target */
- UINT8 irq_schedule; /* 1 if the IRQ state is updated by timer */
+ UINT8 playing; /* 1 if we are actively playing */
+
+ UINT8 keyon; /* 1 if the key is on */
+ UINT8 looping; /* 1 if looping is enabled */
+ UINT8 mode; /* current playback mode */
+ UINT16 fnum; /* frequency */
+ UINT8 level; /* output level */
+ UINT8 pan; /* panning */
+
+ UINT32 start; /* start address, in nibbles */
+ UINT32 stop; /* stop address, in nibbles */
+ UINT32 loop_start; /* loop start address, in nibbles */
+ UINT32 loop_end; /* loop end address, in nibbles */
+ UINT32 position; /* current position, in nibbles */
+
+ INT32 signal; /* current ADPCM signal */
+ INT32 step; /* current ADPCM step */
+
+ INT32 loop_signal; /* signal at loop start */
+ INT32 loop_step; /* step at loop start */
+ UINT32 loop_count; /* number of loops so far */
+
+ INT32 output_left; /* output volume (left) */
+ INT32 output_right; /* output volume (right) */
+ INT32 output_step; /* step value for frequency conversion */
+ INT32 output_pos; /* current fractional position */
+ INT16 last_sample; /* last sample output */
+ INT16 curr_sample; /* current sample target */
+ UINT8 irq_schedule; /* 1 if the IRQ state is updated by timer */
};
struct ymz280b_state
{
- sound_stream * stream; /* which stream are we using */
- UINT8 *region_base; /* pointer to the base of the region */
+ sound_stream * stream; /* which stream are we using */
+ UINT8 *region_base; /* pointer to the base of the region */
UINT32 region_size;
- UINT8 current_register; /* currently accessible register */
- UINT8 status_register; /* current status register */
- UINT8 irq_state; /* current IRQ state */
- UINT8 irq_mask; /* current IRQ mask */
- UINT8 irq_enable; /* current IRQ enable */
- UINT8 keyon_enable; /* key on enable */
- UINT8 ext_mem_enable; /* external memory enable */
- double master_clock; /* master clock frequency */
- void (*irq_callback)(device_t *, int); /* IRQ callback */
- struct YMZ280BVoice voice[8]; /* the 8 voices */
+ UINT8 current_register; /* currently accessible register */
+ UINT8 status_register; /* current status register */
+ UINT8 irq_state; /* current IRQ state */
+ UINT8 irq_mask; /* current IRQ mask */
+ UINT8 irq_enable; /* current IRQ enable */
+ UINT8 keyon_enable; /* key on enable */
+ UINT8 ext_mem_enable; /* external memory enable */
+ double master_clock; /* master clock frequency */
+ void (*irq_callback)(device_t *, int); /* IRQ callback */
+ struct YMZ280BVoice voice[8]; /* the 8 voices */
UINT32 rom_addr_hi;
UINT32 rom_addr_mid;
- UINT32 rom_readback_addr; /* where the CPU can read the ROM */
- devcb_resolved_read8 ext_ram_read; /* external RAM read handler */
- devcb_resolved_write8 ext_ram_write; /* external RAM write handler */
+ UINT32 rom_readback_addr; /* where the CPU can read the ROM */
+ devcb_resolved_read8 ext_ram_read; /* external RAM read handler */
+ devcb_resolved_write8 ext_ram_write; /* external RAM write handler */
#if MAKE_WAVS
- void * wavresample; /* resampled waveform */
+ void * wavresample; /* resampled waveform */
#endif
INT16 *scratch;
@@ -608,10 +608,10 @@ static STREAM_UPDATE( ymz280b_update )
/* generate them into our buffer */
switch (voice->playing << 7 | voice->mode)
{
- case 0x81: samples_left = generate_adpcm(chip, voice, chip->scratch, new_samples); break;
- case 0x82: samples_left = generate_pcm8(chip, voice, chip->scratch, new_samples); break;
- case 0x83: samples_left = generate_pcm16(chip, voice, chip->scratch, new_samples); break;
- default: samples_left = 0; memset(chip->scratch, 0, new_samples * sizeof(chip->scratch[0])); break;
+ case 0x81: samples_left = generate_adpcm(chip, voice, chip->scratch, new_samples); break;
+ case 0x82: samples_left = generate_pcm8(chip, voice, chip->scratch, new_samples); break;
+ case 0x83: samples_left = generate_pcm16(chip, voice, chip->scratch, new_samples); break;
+ default: samples_left = 0; memset(chip->scratch, 0, new_samples * sizeof(chip->scratch[0])); break;
}
/* if there are leftovers, ramp back to 0 */
@@ -806,12 +806,12 @@ static void write_to_register(ymz280b_state *chip, int data)
switch (chip->current_register & 0xe3)
{
- case 0x00: /* pitch low 8 bits */
+ case 0x00: /* pitch low 8 bits */
voice->fnum = (voice->fnum & 0x100) | (data & 0xff);
update_step(chip, voice);
break;
- case 0x01: /* pitch upper 1 bit, loop, key on, mode */
+ case 0x01: /* pitch upper 1 bit, loop, key on, mode */
voice->fnum = (voice->fnum & 0xff) | ((data & 0x01) << 8);
voice->looping = (data & 0x10) >> 4;
if ((data & 0x60) == 0) data &= 0x7f; /* ignore mode setting and set to same state as KON=0 */
@@ -838,61 +838,61 @@ static void write_to_register(ymz280b_state *chip, int data)
update_step(chip, voice);
break;
- case 0x02: /* total level */
+ case 0x02: /* total level */
voice->level = data;
update_volumes(voice);
break;
- case 0x03: /* pan */
+ case 0x03: /* pan */
voice->pan = data & 0x0f;
update_volumes(voice);
break;
- case 0x20: /* start address high */
+ case 0x20: /* start address high */
voice->start = (voice->start & (0x00ffff << 1)) | (data << 17);
break;
- case 0x21: /* loop start address high */
+ case 0x21: /* loop start address high */
voice->loop_start = (voice->loop_start & (0x00ffff << 1)) | (data << 17);
break;
- case 0x22: /* loop end address high */
+ case 0x22: /* loop end address high */
voice->loop_end = (voice->loop_end & (0x00ffff << 1)) | (data << 17);
break;
- case 0x23: /* stop address high */
+ case 0x23: /* stop address high */
voice->stop = (voice->stop & (0x00ffff << 1)) | (data << 17);
break;
- case 0x40: /* start address middle */
+ case 0x40: /* start address middle */
voice->start = (voice->start & (0xff00ff << 1)) | (data << 9);
break;
- case 0x41: /* loop start address middle */
+ case 0x41: /* loop start address middle */
voice->loop_start = (voice->loop_start & (0xff00ff << 1)) | (data << 9);
break;
- case 0x42: /* loop end address middle */
+ case 0x42: /* loop end address middle */
voice->loop_end = (voice->loop_end & (0xff00ff << 1)) | (data << 9);
break;
- case 0x43: /* stop address middle */
+ case 0x43: /* stop address middle */
voice->stop = (voice->stop & (0xff00ff << 1)) | (data << 9);
break;
- case 0x60: /* start address low */
+ case 0x60: /* start address low */
voice->start = (voice->start & (0xffff00 << 1)) | (data << 1);
break;
- case 0x61: /* loop start address low */
+ case 0x61: /* loop start address low */
voice->loop_start = (voice->loop_start & (0xffff00 << 1)) | (data << 1);
break;
- case 0x62: /* loop end address low */
+ case 0x62: /* loop end address low */
voice->loop_end = (voice->loop_end & (0xffff00 << 1)) | (data << 1);
break;
- case 0x63: /* stop address low */
+ case 0x63: /* stop address low */
voice->stop = (voice->stop & (0xffff00 << 1)) | (data << 1);
break;
@@ -914,19 +914,19 @@ static void write_to_register(ymz280b_state *chip, int data)
logerror("YMZ280B: DSP register write %02X = %02X\n", chip->current_register, data);
break;
- case 0x84: /* ROM readback / RAM write (high) */
+ case 0x84: /* ROM readback / RAM write (high) */
chip->rom_addr_hi = data << 16;
break;
- case 0x85: /* ROM readback / RAM write (middle) */
+ case 0x85: /* ROM readback / RAM write (middle) */
chip->rom_addr_mid = data << 8;
break;
- case 0x86: /* ROM readback / RAM write (low) -> update latch */
+ case 0x86: /* ROM readback / RAM write (low) -> update latch */
chip->rom_readback_addr = chip->rom_addr_hi | chip->rom_addr_mid | data;
break;
- case 0x87: /* RAM write */
+ case 0x87: /* RAM write */
if (chip->ext_mem_enable)
{
if (!chip->ext_ram_write.isnull())
@@ -937,12 +937,12 @@ static void write_to_register(ymz280b_state *chip, int data)
}
break;
- case 0xfe: /* IRQ mask */
+ case 0xfe: /* IRQ mask */
chip->irq_mask = data;
update_irq_state(chip);
break;
- case 0xff: /* IRQ enable, test, etc */
+ case 0xff: /* IRQ enable, test, etc */
chip->ext_mem_enable = (data & 0x40) >> 6;
chip->irq_enable = (data & 0x10) >> 4;
update_irq_state(chip);
@@ -1046,7 +1046,7 @@ const device_type YMZ280B = &device_creator<ymz280b_device>;
ymz280b_device::ymz280b_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, YMZ280B, "YMZ280B", tag, owner, clock),
- device_sound_interface(mconfig, *this)
+ device_sound_interface(mconfig, *this)
{
m_token = global_alloc_clear(ymz280b_state);
}
@@ -1088,5 +1088,3 @@ void ymz280b_device::sound_stream_update(sound_stream &stream, stream_sample_t *
// should never get here
fatalerror("sound_stream_update called; not applicable to legacy sound devices\n");
}
-
-