aboutsummaryrefslogtreecommitdiff
path: root/source/soundux.c
diff options
context:
space:
mode:
Diffstat (limited to 'source/soundux.c')
-rw-r--r--source/soundux.c645
1 files changed, 231 insertions, 414 deletions
diff --git a/source/soundux.c b/source/soundux.c
index 280c9f9..9e71bae 100644
--- a/source/soundux.c
+++ b/source/soundux.c
@@ -6,21 +6,19 @@
#include <stdio.h>
#include <string.h>
#include <errno.h>
-#include <fcntl.h>
#define CLIP16(v) \
- if ((v) < -32768) \
+if ((v) < -32768) \
(v) = -32768; \
- else \
- if ((v) > 32767) \
-(v) = 32767
+else \
+if ((v) > 32767) \
+ (v) = 32767
#define CLIP8(v) \
- if ((v) < -128) \
+if ((v) < -128) \
(v) = -128; \
- else \
- if ((v) > 127) \
-(v) = 127
+else if ((v) > 127) \
+ (v) = 127
#include "snes9x.h"
#include "soundux.h"
@@ -29,7 +27,6 @@
#include "cpuexec.h"
extern int32_t Echo [24000];
-extern int32_t DummyEchoBuffer [SOUND_BUFFER_SIZE];
extern int32_t MixBuffer [SOUND_BUFFER_SIZE];
extern int32_t EchoBuffer [SOUND_BUFFER_SIZE];
extern int32_t FilterTaps [8];
@@ -40,6 +37,42 @@ extern int32_t Loop [16];
extern long FilterValues[4][2];
extern int32_t NoiseFreq [32];
+uint32_t AttackRate [16] =
+{
+ 4100, 2600, 1500, 1000, 640, 380, 260, 160,
+ 96, 64, 40, 24, 16, 10, 6, 1
+};
+
+uint32_t DecayRate [8] =
+{
+ 1200, 740, 440, 290, 180, 110, 74, 37
+};
+
+uint32_t DecreaseRateExp [32] =
+{
+ 0xFFFFFFFF, 38000, 28000, 24000, 19000, 14000, 12000, 9400,
+ 7100, 5900, 4700, 3500, 2900, 2400, 1800, 1500,
+ 1200, 880, 740, 590, 440, 370, 290, 220,
+ 180, 150, 110, 92, 74, 55, 37, 18
+};
+
+uint32_t IncreaseRate [32] =
+{
+ 0xFFFFFFFF, 4100, 3100, 2600, 2000, 1500, 1300, 1000,
+ 770, 640, 510, 380, 320, 260, 190, 160,
+ 130, 96, 80, 64, 48, 40, 32, 24,
+ 20, 16, 12, 10, 8, 6, 4, 2
+};
+
+#define SustainRate DecreaseRateExp
+
+// precalculated env rates for S9xSetEnvRate
+uint32_t AttackERate [16][10];
+uint32_t DecayERate [8][10];
+uint32_t SustainERate [32][10];
+uint32_t IncreaseERate [32][10];
+uint32_t DecreaseERateExp[32][10];
+uint32_t KeyOffERate [10];
static int32_t noise_gen;
@@ -51,7 +84,6 @@ static int32_t noise_gen;
#define ENVX_SHIFT 24
void DecodeBlockAsm(int8_t*, int16_t*, int32_t*, int32_t*);
-void DecodeBlockAsm2(int8_t*, int16_t*, int32_t*, int32_t*);
// F is channel's current frequency and M is the 16-bit modulation waveform
// from the previous channel multiplied by the current envelope volume level.
@@ -60,17 +92,6 @@ void DecodeBlockAsm2(int8_t*, int16_t*, int32_t*, int32_t*);
#define LAST_SAMPLE 0xffffff
#define JUST_PLAYED_LAST_SAMPLE(c) ((c)->sample_pointer >= LAST_SAMPLE)
-void S9xSetEightBitConsoleSound(bool Enabled)
-{
- if (Settings.EightBitConsoleSound != Enabled)
- {
- Settings.EightBitConsoleSound = Enabled;
- int i;
- for (i = 0; i < 8; i++)
- SoundData.channels[i].needs_decode = true;
- }
-}
-
static inline uint8_t* S9xGetSampleAddress(int sample_number)
{
uint32_t addr = (((APU.DSP[APU_DIR] << 8) + (sample_number << 2)) & 0xffff);
@@ -92,7 +113,7 @@ void S9xAPUSetEndX(int ch)
APU.DSP [APU_ENDX] |= 1 << ch;
}
-void S9xSetEnvRate(Channel* ch, uint32_t rate, int direction, int target)
+void S9xSetEnvRate(Channel* ch, uint32_t rate, int direction, int target, unsigned int mode)
{
ch->envx_target = target;
@@ -104,38 +125,39 @@ void S9xSetEnvRate(Channel* ch, uint32_t rate, int direction, int target)
else
ch->direction = direction;
- static int64_t steps [] =
- {
- // 0, 64, 1238, 1238, 256, 1, 64, 109, 64, 1238
- 0,
- (int64_t) FIXED_POINT * 1000 * 64,
- (int64_t) FIXED_POINT * 1000 * 619,
- (int64_t) FIXED_POINT * 1000 * 619,
- (int64_t) FIXED_POINT * 1000 * 128,
- (int64_t) FIXED_POINT * 1000 * 1,
- (int64_t) FIXED_POINT * 1000 * 64,
- (int64_t) FIXED_POINT * 1000 * 55,
- (int64_t) FIXED_POINT * 1000 * 64,
- (int64_t) FIXED_POINT * 1000 * 619
- };
-
if (rate == 0 || so.playback_rate == 0)
ch->erate = 0;
else
{
- ch->erate = (uint32_t)
- (steps [ch->state] / (rate * so.playback_rate));
+ switch (mode >> 28)
+ {
+ case 0: // Attack
+ ch->erate = AttackERate[ch->env_ind_attack][ch->state];
+ break;
+ case 1: // Decay
+ ch->erate = DecayERate[ch->env_ind_decay][ch->state];
+ break;
+ case 2: // Sustain
+ ch->erate = SustainERate[ch->env_ind_sustain][ch->state];
+ break;
+ case 3: // Increase
+ ch->erate = IncreaseERate[mode & 0x1f][ch->state];
+ break;
+ case 4: // DecreaseExp
+ ch->erate = DecreaseERateExp[mode & 0x1f][ch->state];
+ break;
+ case 5: // KeyOff
+ ch->erate = KeyOffERate[ch->state];
+ break;
+ }
}
}
-
-void S9xSetEnvelopeRate(int channel, uint32_t rate, int direction,
- int target)
+void S9xSetEnvelopeRate(int channel, uint32_t rate, int direction, int target, unsigned int mode)
{
- S9xSetEnvRate(&SoundData.channels [channel], rate, direction, target);
+ S9xSetEnvRate(&SoundData.channels [channel], rate, direction, target, mode);
}
-
void S9xSetSoundVolume(int channel, int16_t volume_left, int16_t volume_right)
{
Channel* ch = &SoundData.channels[channel];
@@ -180,7 +202,7 @@ void S9xSetEchoEnable(uint8_t byte)
if (byte & (1 << i))
SoundData.channels [i].echo_buf_ptr = EchoBuffer;
else
- SoundData.channels [i].echo_buf_ptr = DummyEchoBuffer;
+ SoundData.channels [i].echo_buf_ptr = NULL;
}
}
@@ -192,7 +214,7 @@ void S9xSetEchoFeedback(int feedback)
void S9xSetEchoDelay(int delay)
{
- SoundData.echo_buffer_size = (512 * delay * so.playback_rate) / 32000;
+ SoundData.echo_buffer_size = (512 * delay * so.playback_rate) >> 15;
SoundData.echo_buffer_size <<= 1;
if (SoundData.echo_buffer_size)
SoundData.echo_ptr %= SoundData.echo_buffer_size;
@@ -209,7 +231,7 @@ void S9xSetEchoWriteEnable(uint8_t byte)
void S9xSetFrequencyModulationEnable(uint8_t byte)
{
- SoundData.pitch_mod = byte & ~1;
+ SoundData.pitch_mod = byte & 0xFE;
}
void S9xSetSoundKeyOff(int channel)
@@ -220,7 +242,7 @@ void S9xSetSoundKeyOff(int channel)
{
ch->state = SOUND_RELEASE;
ch->mode = MODE_RELEASE;
- S9xSetEnvRate(ch, 8, -1, 0);
+ S9xSetEnvRate(ch, 8, -1, 0, 5 << 28);
}
}
@@ -247,10 +269,8 @@ void S9xFixSoundAfterSnapshotLoad()
SoundData.channels [i].envxx = SoundData.channels [i].envx << ENVX_SHIFT;
SoundData.channels [i].next_sample = 0;
SoundData.channels [i].interpolate = 0;
- SoundData.channels [i].previous [0] = (int32_t)
- SoundData.channels [i].previous16 [0];
- SoundData.channels [i].previous [1] = (int32_t)
- SoundData.channels [i].previous16 [1];
+ SoundData.channels [i].previous [0] = (int32_t) SoundData.channels [i].previous16 [0];
+ SoundData.channels [i].previous [1] = (int32_t) SoundData.channels [i].previous16 [1];
}
IAPU.Scanline = 0;
}
@@ -264,10 +284,21 @@ void S9xSetFilterCoefficient(int tap, int value)
FilterTapDefinitionBitfield |= 1 << (tap & 7);
}
-void S9xSetSoundADSR(int channel, int attack_rate, int decay_rate,
- int sustain_rate, int sustain_level, int release_rate)
+void S9xSetSoundADSR(int channel, int attack_ind, int decay_ind, int sustain_ind, int sustain_level, int release_rate)
{
+ int attack_rate = AttackRate [attack_ind];
+ int decay_rate = DecayRate [decay_ind];
+ int sustain_rate = SustainRate [sustain_ind];
+
+ // Hack for ROMs that use a very short attack rate, key on a
+ // channel, then switch to decay mode. e.g. Final Fantasy II.
+ if(attack_rate == 1)
+ attack_rate = 0;
+
Channel* ch = &SoundData.channels[channel];
+ ch->env_ind_attack = attack_ind;
+ ch->env_ind_decay = decay_ind;
+ ch->env_ind_sustain = sustain_ind;
ch->attack_rate = attack_rate;
ch->decay_rate = decay_rate;
ch->sustain_rate = sustain_rate;
@@ -277,15 +308,14 @@ void S9xSetSoundADSR(int channel, int attack_rate, int decay_rate,
switch (SoundData.channels[channel].state)
{
case SOUND_ATTACK:
- S9xSetEnvRate(ch, attack_rate, 1, 127);
+ S9xSetEnvRate(ch, attack_rate, 1, 127, 0);
break;
-
case SOUND_DECAY:
S9xSetEnvRate(ch, decay_rate, -1,
- (MAX_ENVELOPE_HEIGHT * (sustain_level + 1)) >> 3);
+ (MAX_ENVELOPE_HEIGHT * (sustain_level + 1)) >> 3, 1 << 28);
break;
case SOUND_SUSTAIN:
- S9xSetEnvRate(ch, sustain_rate, -1, 0);
+ S9xSetEnvRate(ch, sustain_rate, -1, 0, 2 << 28);
break;
}
}
@@ -320,14 +350,13 @@ int S9xGetEnvelopeHeight(int channel)
return (0);
}
-void S9xSetSoundFrequency(int channel, int hertz)
+void S9xSetSoundFrequency(int channel, int hertz) // hertz [0~64K<<1]
{
if (so.playback_rate)
{
if (SoundData.channels[channel].type == SOUND_NOISE)
hertz = NoiseFreq [APU.DSP [APU_FLG] & 0x1f];
- SoundData.channels[channel].frequency = (int)
- (((int64_t) hertz * FIXED_POINT) / so.playback_rate);
+ SoundData.channels[channel].frequency = (hertz * so.freqbase) >> 11;
}
}
@@ -345,13 +374,11 @@ void S9xSetSoundType(int channel, int type_of_sound)
void DecodeBlock(Channel* ch)
{
int32_t out;
- unsigned char filter;
+ uint8_t filter;
unsigned char shift;
signed char sample1, sample2;
- unsigned char i;
- bool invalid_header;
- if (ch->block_pointer > 0x10000 - 9)
+ if (ch->block_pointer >= 0x10000 - 9)
{
ch->last_block = true;
ch->loop = false;
@@ -359,274 +386,88 @@ void DecodeBlock(Channel* ch)
return;
}
- if (Settings.EightBitConsoleSound)
- {
- signed char* compressed = (signed char*) &IAPU.RAM [ch->block_pointer];
-
- filter = *compressed;
- if ((ch->last_block = filter & 1))
- ch->loop = (filter & 2) != 0;
-
- int16_t interim[16];
- uint8_t interim_byte = 0;
-
- compressed++;
+ int8_t* compressed = (int8_t*) &IAPU.RAM [ch->block_pointer];
- // Seperate out the header parts used for decoding
+ filter = *compressed;
+ if ((ch->last_block = filter & 1))
+ ch->loop = (filter & 2) != 0;
- shift = filter >> 4;
+ int16_t* raw = ch->block = ch->decoded;
+ unsigned int i;
- // Header validity check: if range(shift) is over 12, ignore
- // all bits of the data for that block except for the sign bit of each
- invalid_header = (shift >= 0xD);
+ compressed++;
- filter = filter & 0x0c;
-
- int32_t prev0 = ch->previous [0];
- int32_t prev1 = ch->previous [1];
-
- int16_t amplitude = 0;
+ int32_t prev0 = ch->previous [0];
+ int32_t prev1 = ch->previous [1];
+ shift = filter >> 4;
+ switch ((filter >> 2) & 3)
+ {
+ case 0:
for (i = 8; i != 0; i--)
{
sample1 = *compressed++;
sample2 = sample1 << 4;
- //Sample 2 = Bottom Nibble, Sign Extended.
sample2 >>= 4;
- //Sample 1 = Top Nibble, shifted down and Sign Extended.
sample1 >>= 4;
- if (invalid_header)
- {
- sample1 >>= 3;
- sample2 >>= 3;
- }
-
- int nybblesmp;
- for (nybblesmp = 0; nybblesmp < 2; nybblesmp++)
- {
- out = (((nybblesmp) ? sample2 : sample1) << shift);
- out >>= 1;
-
- switch (filter)
- {
- case 0x00:
- // Method0 - [Smp]
- break;
-
- case 0x04:
- // Method1 - [Delta]+[Smp-1](15/16)
- out += (prev0 >> 1) + ((-prev0) >> 5);
- break;
-
- case 0x08:
- // Method2 - [Delta]+[Smp-1](61/32)-[Smp-2](15/16)
- out += (prev0) + ((-(prev0 + (prev0 >> 1))) >> 5) - (prev1 >> 1) + (prev1 >> 5);
- break;
-
- default:
- // Method3 - [Delta]+[Smp-1](115/64)-[Smp-2](13/16)
- out += (prev0) + ((-(prev0 + (prev0 << 2) + (prev0 << 3))) >> 7) -
- (prev1 >> 1) + ((prev1 + (prev1 >> 1)) >> 4);
- break;
-
- }
- CLIP16(out);
- int16_t result = (int16_t)(out << 1);
- if (abs(result) > amplitude)
- amplitude = abs(result);
- interim[interim_byte++] = out;
- prev1 = (int16_t)prev0;
- prev0 = (int16_t)(out << 1);
- }
- }
- ch->previous [0] = prev0;
- ch->previous [1] = prev1;
-
- int32_t total_deviation_from_previous = 0;
- for (i = 1; i < 16; i++)
- total_deviation_from_previous += abs(interim[i] - interim[i - 1]);
- if (total_deviation_from_previous >= (int32_t) amplitude * 4)
- {
- /* Looks like noise. Generate noise. */
- for (i = 0; i < 16; i++)
- {
- int feedback = (noise_gen << 13) ^ (noise_gen << 14);
- noise_gen = (feedback & 0x4000) ^ (noise_gen >> 1);
- ch->decoded[i] = (noise_gen << 17) >> 17;
- }
- }
- else if (interim[0] < interim[1] && interim[1] < interim[2]
- && interim[2] < interim[3]
- && interim[4] > interim[5] && interim[5] > interim[6]
- && interim[6] > interim[7] && interim[7] > interim[8]
- && interim[8] > interim[9] && interim[9] > interim[10]
- && interim[10] > interim[11]
- && interim[12] < interim[13] && interim[13] < interim[14]
- && interim[14] < interim[15])
- {
- /* Looks like a sine or triangle wave. Make it a
- * triangle wave with an amplitude equivalent to that
- * of the highest amplitude sample of the block. */
- ch->decoded[0] = ch->decoded[8] = 0;
- ch->decoded[1] = ch->decoded[7] = amplitude / 4;
- ch->decoded[2] = ch->decoded[6] = amplitude / 2;
- ch->decoded[3] = ch->decoded[5] = amplitude * 3 / 4;
- ch->decoded[4] = amplitude;
- ch->decoded[9] = ch->decoded[15] = -(amplitude / 4);
- ch->decoded[10] = ch->decoded[14] = -(amplitude / 2);
- ch->decoded[11] = ch->decoded[13] = -(amplitude * 3 / 4);
- ch->decoded[12] = -amplitude;
- }
- else if (interim[0] > interim[1] && interim[1] > interim[2]
- && interim[2] > interim[3]
- && interim[4] < interim[5] && interim[5] < interim[6]
- && interim[6] < interim[7] && interim[7] < interim[8]
- && interim[8] < interim[9] && interim[9] < interim[10]
- && interim[10] < interim[11]
- && interim[12] > interim[13] && interim[13] > interim[14]
- && interim[14] > interim[15])
- {
- /* Inverted triangle wave. */
- ch->decoded[0] = ch->decoded[8] = 0;
- ch->decoded[1] = ch->decoded[7] = -(amplitude / 4);
- ch->decoded[2] = ch->decoded[6] = -(amplitude / 2);
- ch->decoded[3] = ch->decoded[5] = -(amplitude * 3 / 4);
- ch->decoded[4] = -amplitude;
- ch->decoded[9] = ch->decoded[15] = amplitude / 4;
- ch->decoded[10] = ch->decoded[14] = amplitude / 2;
- ch->decoded[11] = ch->decoded[13] = amplitude * 3 / 4;
- ch->decoded[12] = amplitude;
- }
- else if (interim[0] < interim[1] && interim[1] < interim[2]
- && interim[2] < interim[3] && interim[3] < interim[4]
- && interim[4] < interim[5] && interim[5] < interim[6]
- && interim[6] < interim[7]
- && interim[8] > interim[9] && interim[9] > interim[10]
- && interim[10] > interim[11] && interim[11] > interim[12]
- && interim[12] > interim[13] && interim[13] > interim[14]
- && interim[14] > interim[15])
- {
- /* Looks like a V wave. Make it a half-triangle wave
- * with an amplitude equivalent to that
- * of the highest amplitude sample of the block. */
- ch->decoded[0] = 0;
- ch->decoded[1] = ch->decoded[15] = amplitude / 8;
- ch->decoded[2] = ch->decoded[14] = amplitude / 4;
- ch->decoded[3] = ch->decoded[13] = amplitude * 3 / 8;
- ch->decoded[4] = ch->decoded[12] = amplitude / 2;
- ch->decoded[5] = ch->decoded[11] = amplitude * 5 / 8;
- ch->decoded[6] = ch->decoded[10] = amplitude * 3 / 4;
- ch->decoded[7] = ch->decoded[9] = amplitude * 7 / 8;
- ch->decoded[8] = amplitude;
+ *raw++ = ((int32_t) sample1 << shift);
+ *raw++ = ((int32_t) sample2 << shift);
}
- else if (interim[0] > interim[1] && interim[1] > interim[2]
- && interim[2] > interim[3] && interim[3] > interim[4]
- && interim[4] > interim[5] && interim[5] > interim[6]
- && interim[6] > interim[7]
- && interim[8] < interim[9] && interim[9] < interim[10]
- && interim[10] < interim[11] && interim[11] < interim[12]
- && interim[12] < interim[13] && interim[13] < interim[14]
- && interim[14] < interim[15])
+ prev1 = *(raw - 2);
+ prev0 = *(raw - 1);
+ break;
+ case 1:
+ for (i = 8; i != 0; i--)
{
- /* Inverted V wave. */
- ch->decoded[0] = 0;
- ch->decoded[1] = ch->decoded[15] = -(amplitude / 8);
- ch->decoded[2] = ch->decoded[14] = -(amplitude / 4);
- ch->decoded[3] = ch->decoded[13] = -(amplitude * 3 / 8);
- ch->decoded[4] = ch->decoded[12] = -(amplitude / 2);
- ch->decoded[5] = ch->decoded[11] = -(amplitude * 5 / 8);
- ch->decoded[6] = ch->decoded[10] = -(amplitude * 3 / 4);
- ch->decoded[7] = ch->decoded[9] = -(amplitude * 7 / 8);
- ch->decoded[8] = -amplitude;
+ sample1 = *compressed++;
+ sample2 = sample1 << 4;
+ sample2 >>= 4;
+ sample1 >>= 4;
+ prev0 = (int16_t) prev0;
+ *raw++ = prev1 = ((int32_t) sample1 << shift) + prev0 - (prev0 >> 4);
+ prev1 = (int16_t) prev1;
+ *raw++ = prev0 = ((int32_t) sample2 << shift) + prev1 - (prev1 >> 4);
}
- else
+ break;
+ case 2:
+ for (i = 8; i != 0; i--)
{
- // Make it a square wave with an amplitude equivalent to that
- // of the highest amplitude sample of the block.
- // But actually put half of the amplitude, because
- // square waves are just loud.
- for (i = 0; i < 8; i++)
- ch->decoded[i] = amplitude / 2;
- for (i = 8; i < 16; i++)
- ch->decoded[i] = -(amplitude / 2);
+ sample1 = *compressed++;
+ sample2 = sample1 << 4;
+ sample2 >>= 4;
+ sample1 >>= 4;
+ out = (sample1 << shift) - prev1 + (prev1 >> 4);
+ prev1 = (int16_t) prev0;
+ prev0 &= ~3;
+ *raw++ = prev0 = out + (prev0 << 1) - (prev0 >> 5) - (prev0 >> 4);
+ out = (sample2 << shift) - prev1 + (prev1 >> 4);
+ prev1 = (int16_t) prev0;
+ prev0 &= ~3;
+ *raw++ = prev0 = out + (prev0 << 1) - (prev0 >> 5) - (prev0 >> 4);
}
- }
- else
- {
- signed char* compressed = (signed char*) &IAPU.RAM [ch->block_pointer];
-
- filter = *compressed;
- if ((ch->last_block = filter & 1))
- ch->loop = (filter & 2) != 0;
-
- compressed++;
- int16_t* raw = ch->block = ch->decoded;
-
- // Seperate out the header parts used for decoding
-
- shift = filter >> 4;
-
- // Header validity check: if range(shift) is over 12, ignore
- // all bits of the data for that block except for the sign bit of each
- invalid_header = (shift >= 0xD);
-
- filter = filter & 0x0c;
-
- int32_t prev0 = ch->previous [0];
- int32_t prev1 = ch->previous [1];
-
+ break;
+ case 3:
for (i = 8; i != 0; i--)
{
sample1 = *compressed++;
sample2 = sample1 << 4;
- //Sample 2 = Bottom Nibble, Sign Extended.
sample2 >>= 4;
- //Sample 1 = Top Nibble, shifted down and Sign Extended.
sample1 >>= 4;
- if (invalid_header)
- {
- sample1 >>= 3;
- sample2 >>= 3;
- }
-
- int nybblesmp;
- for (nybblesmp = 0; nybblesmp < 2; nybblesmp++)
- {
- out = (((nybblesmp) ? sample2 : sample1) << shift);
- out >>= 1;
-
- switch (filter)
- {
- case 0x00:
- // Method0 - [Smp]
- break;
-
- case 0x04:
- // Method1 - [Delta]+[Smp-1](15/16)
- out += (prev0 >> 1) + ((-prev0) >> 5);
- break;
-
- case 0x08:
- // Method2 - [Delta]+[Smp-1](61/32)-[Smp-2](15/16)
- out += (prev0) + ((-(prev0 + (prev0 >> 1))) >> 5) - (prev1 >> 1) + (prev1 >> 5);
- break;
-
- default:
- // Method3 - [Delta]+[Smp-1](115/64)-[Smp-2](13/16)
- out += (prev0) + ((-(prev0 + (prev0 << 2) + (prev0 << 3))) >> 7) -
- (prev1 >> 1) + ((prev1 + (prev1 >> 1)) >> 4);
- break;
-
- }
- CLIP16(out);
- *raw++ = (int16_t)(out << 1);
- prev1 = (int16_t)prev0;
- prev0 = (int16_t)(out << 1);
- }
+ out = (sample1 << shift);
+ out = out - prev1 + (prev1 >> 3) + (prev1 >> 4);
+ prev1 = (int16_t) prev0;
+ prev0 &= ~3;
+ *raw++ = prev0 = out + (prev0 << 1) - (prev0 >> 3) - (prev0 >> 4) - (prev1 >> 6);
+ out = (sample2 << shift);
+ out = out - prev1 + (prev1 >> 3) + (prev1 >> 4);
+ prev1 = (int16_t) prev0;
+ prev0 &= ~3;
+ *raw++ = prev0 = out + (prev0 << 1) - (prev0 >> 3) - (prev0 >> 4) - (prev1 >> 6);
}
- ch->previous [0] = prev0;
- ch->previous [1] = prev1;
+ break;
}
+ ch->previous [0] = prev0;
+ ch->previous [1] = prev1;
ch->block_pointer += 9;
}
@@ -641,7 +482,7 @@ static inline void MixStereo(int sample_count)
{
Channel* ch = &SoundData.channels[J];
- if (ch->state == SOUND_SILENT || !(so.sound_switch & (1 << J)))
+ if (ch->state == SOUND_SILENT)
continue;
int32_t VL, VR;
@@ -698,15 +539,13 @@ static inline void MixStereo(int sample_count)
if (ch->sustain_level != 8)
{
S9xSetEnvRate(ch, ch->decay_rate, -1,
- (MAX_ENVELOPE_HEIGHT * ch->sustain_level)
- >> 3);
+ (MAX_ENVELOPE_HEIGHT * ch->sustain_level) >> 3, 1 << 28);
break;
}
ch->state = SOUND_SUSTAIN;
- S9xSetEnvRate(ch, ch->sustain_rate, -1, 0);
+ S9xSetEnvRate(ch, ch->sustain_rate, -1, 0, 2 << 28);
}
break;
-
case SOUND_DECAY:
while (ch->env_error >= FIXED_POINT)
{
@@ -722,10 +561,9 @@ static inline void MixStereo(int sample_count)
goto stereo_exit;
}
ch->state = SOUND_SUSTAIN;
- S9xSetEnvRate(ch, ch->sustain_rate, -1, 0);
+ S9xSetEnvRate(ch, ch->sustain_rate, -1, 0, 2 << 28);
}
break;
-
case SOUND_SUSTAIN:
while (ch->env_error >= FIXED_POINT)
{
@@ -739,7 +577,6 @@ static inline void MixStereo(int sample_count)
goto stereo_exit;
}
break;
-
case SOUND_RELEASE:
while (ch->env_error >= FIXED_POINT)
{
@@ -753,7 +590,6 @@ static inline void MixStereo(int sample_count)
goto stereo_exit;
}
break;
-
case SOUND_INCREASE_LINEAR:
ch->env_error &= FIXED_POINT_REMAINDER;
ch->envx += step << 1;
@@ -765,10 +601,9 @@ static inline void MixStereo(int sample_count)
ch->envxx = 127 << ENVX_SHIFT;
ch->state = SOUND_GAIN;
ch->mode = MODE_GAIN;
- S9xSetEnvRate(ch, 0, -1, 0);
+ S9xSetEnvRate(ch, 0, -1, 0, 0);
}
break;
-
case SOUND_INCREASE_BENT_LINE:
if (ch->envx >= (MAX_ENVELOPE_HEIGHT * 3) / 4)
{
@@ -792,10 +627,9 @@ static inline void MixStereo(int sample_count)
ch->envxx = 127 << ENVX_SHIFT;
ch->state = SOUND_GAIN;
ch->mode = MODE_GAIN;
- S9xSetEnvRate(ch, 0, -1, 0);
+ S9xSetEnvRate(ch, 0, -1, 0, 0);
}
break;
-
case SOUND_DECREASE_LINEAR:
ch->env_error &= FIXED_POINT_REMAINDER;
ch->envx -= step << 1;
@@ -806,7 +640,6 @@ static inline void MixStereo(int sample_count)
goto stereo_exit;
}
break;
-
case SOUND_DECREASE_EXPONENTIAL:
while (ch->env_error >= FIXED_POINT)
{
@@ -820,9 +653,8 @@ static inline void MixStereo(int sample_count)
goto stereo_exit;
}
break;
-
case SOUND_GAIN:
- S9xSetEnvRate(ch, 0, -1, 0);
+ S9xSetEnvRate(ch, 0, -1, 0, 0);
break;
}
ch-> left_vol_level = (ch->envx * ch->volume_left) / 128;
@@ -916,6 +748,10 @@ static inline void MixStereo(int sample_count)
MixBuffer [I ] += VL;
MixBuffer [I + 1] += VR;
+
+ if (!ch->echo_buf_ptr)
+ continue;
+
ch->echo_buf_ptr [I ] += VL;
ch->echo_buf_ptr [I + 1] += VR;
}
@@ -924,11 +760,17 @@ stereo_exit:
}
}
-void S9xMixSamples(uint8_t* buffer, int sample_count)
+void S9xMixSamples(uint16_t* buffer, int sample_count)
{
int J;
int I;
+ if (so.mute_sound)
+ {
+ memset(buffer, 0, sample_count * sizeof(buffer [0]));
+ return;
+ }
+
if (SoundData.echo_enable)
memset(EchoBuffer, 0, sample_count * sizeof(EchoBuffer [0]));
memset(MixBuffer, 0, sample_count * sizeof(MixBuffer [0]));
@@ -944,19 +786,14 @@ void S9xMixSamples(uint8_t* buffer, int sample_count)
for (J = 0; J < sample_count; J++)
{
int E = Echo [SoundData.echo_ptr];
+ Echo[SoundData.echo_ptr++] = (E * SoundData.echo_feedback) / 128 + EchoBuffer [J];
- Echo [SoundData.echo_ptr] = (E * SoundData.echo_feedback) / 128 +
- EchoBuffer [J];
-
- if ((SoundData.echo_ptr += 1) >= SoundData.echo_buffer_size)
+ if (SoundData.echo_ptr >= SoundData.echo_buffer_size)
SoundData.echo_ptr = 0;
- I = (MixBuffer [J] *
- SoundData.master_volume [J & 1] +
- E * SoundData.echo_volume [J & 1]) / VOL_DIV16;
-
+ I = (MixBuffer[J] * SoundData.master_volume [J & 1] + E * SoundData.echo_volume [J & 1]) / VOL_DIV16;
CLIP16(I);
- ((int16_t*) buffer)[J] = I;
+ buffer[J] = I;
}
}
else
@@ -964,39 +801,26 @@ void S9xMixSamples(uint8_t* buffer, int sample_count)
// ... with filter defined.
for (J = 0; J < sample_count; J++)
{
- int E = Echo [SoundData.echo_ptr];
-
- Loop [(Z - 0) & 15] = E;
- E = E * FilterTaps [0];
- if (FilterTapDefinitionBitfield & 0x02) E += Loop [(Z - 2) & 15] *
- FilterTaps [1];
- if (FilterTapDefinitionBitfield & 0x04) E += Loop [(Z - 4) & 15] *
- FilterTaps [2];
- if (FilterTapDefinitionBitfield & 0x08) E += Loop [(Z - 6) & 15] *
- FilterTaps [3];
- if (FilterTapDefinitionBitfield & 0x10) E += Loop [(Z - 8) & 15] *
- FilterTaps [4];
- if (FilterTapDefinitionBitfield & 0x20) E += Loop [(Z - 10) & 15] *
- FilterTaps [5];
- if (FilterTapDefinitionBitfield & 0x40) E += Loop [(Z - 12) & 15] *
- FilterTaps [6];
- if (FilterTapDefinitionBitfield & 0x80) E += Loop [(Z - 14) & 15] *
- FilterTaps [7];
+ Loop [(Z - 0) & 15] = Echo [SoundData.echo_ptr];
+ int E = Loop [(Z - 0) & 15] * FilterTaps [0];
+ if (FilterTapDefinitionBitfield & 0x02) E += Loop [(Z - 2) & 15] * FilterTaps [1];
+ if (FilterTapDefinitionBitfield & 0x04) E += Loop [(Z - 4) & 15] * FilterTaps [2];
+ if (FilterTapDefinitionBitfield & 0x08) E += Loop [(Z - 6) & 15] * FilterTaps [3];
+ if (FilterTapDefinitionBitfield & 0x10) E += Loop [(Z - 8) & 15] * FilterTaps [4];
+ if (FilterTapDefinitionBitfield & 0x20) E += Loop [(Z - 10) & 15] * FilterTaps [5];
+ if (FilterTapDefinitionBitfield & 0x40) E += Loop [(Z - 12) & 15] * FilterTaps [6];
+ if (FilterTapDefinitionBitfield & 0x80) E += Loop [(Z - 14) & 15] * FilterTaps [7];
E /= 128;
Z++;
- Echo [SoundData.echo_ptr] = (E * SoundData.echo_feedback) / 128 +
- EchoBuffer [J];
+ Echo[SoundData.echo_ptr++] = (E * SoundData.echo_feedback) / 128 + EchoBuffer[J];
- if ((SoundData.echo_ptr += 1) >= SoundData.echo_buffer_size)
+ if (SoundData.echo_ptr >= SoundData.echo_buffer_size)
SoundData.echo_ptr = 0;
- I = (MixBuffer [J] *
- SoundData.master_volume [J & 1] +
- E * SoundData.echo_volume [J & 1]) / VOL_DIV16;
-
+ I = (MixBuffer[J] * SoundData.master_volume [J & 1] + E * SoundData.echo_volume [J & 1]) / VOL_DIV16;
CLIP16(I);
- ((int16_t*) buffer)[J] = I;
+ buffer[J] = I;
}
}
}
@@ -1005,14 +829,11 @@ void S9xMixSamples(uint8_t* buffer, int sample_count)
// 16-bit mono or stereo sound, no echo
for (J = 0; J < sample_count; J++)
{
- I = (MixBuffer [J] *
- SoundData.master_volume [J & 1]) / VOL_DIV16;
-
+ I = (MixBuffer[J] * SoundData.master_volume [J & 1]) / VOL_DIV16;
CLIP16(I);
- ((int16_t*) buffer)[J] = I;
+ buffer[J] = I;
}
}
-
}
void S9xResetSound(bool full)
@@ -1041,6 +862,10 @@ void S9xResetSound(bool full)
SoundData.channels[i].sustain_rate = 0;
SoundData.channels[i].release_rate = 0;
SoundData.channels[i].sustain_level = 0;
+ // notaz
+ SoundData.channels[i].env_ind_attack = 0;
+ SoundData.channels[i].env_ind_decay = 0;
+ SoundData.channels[i].env_ind_sustain = 0;
SoundData.echo_ptr = 0;
SoundData.echo_feedback = 0;
SoundData.echo_buffer_size = 1;
@@ -1055,10 +880,6 @@ void S9xResetSound(bool full)
FilterTaps [7] = 0;
FilterTapDefinitionBitfield = 0;
noise_gen = 1;
- so.sound_switch = 255;
- so.samples_mixed_so_far = 0;
- so.play_position = 0;
- so.err_counter = 0;
if (full)
{
@@ -1066,9 +887,6 @@ void S9xResetSound(bool full)
SoundData.echo_write_enabled = 0;
SoundData.echo_channel_enable = 0;
SoundData.pitch_mod = 0;
- SoundData.dummy[0] = 0;
- SoundData.dummy[1] = 0;
- SoundData.dummy[2] = 0;
SoundData.master_volume[0] = 0;
SoundData.master_volume[1] = 0;
SoundData.echo_volume[0] = 0;
@@ -1077,18 +895,46 @@ void S9xResetSound(bool full)
}
SoundData.master_volume [0] = SoundData.master_volume [1] = 127;
- if (so.playback_rate)
- so.err_rate = (uint32_t)(FIXED_POINT * SNES_SCANLINE_TIME /
- (1.0 / so.playback_rate));
- else
- so.err_rate = 0;
+ so.mute_sound = true;
}
void S9xSetPlaybackRate(uint32_t playback_rate)
{
so.playback_rate = playback_rate;
- so.err_rate = (uint32_t)(SNES_SCANLINE_TIME * FIXED_POINT / (1.0 /
- (double) so.playback_rate));
+
+ if (playback_rate)
+ {
+ // notaz: calculate a value (let's call it freqbase) to simplify channel freq calculations later.
+ so.freqbase = (FIXED_POINT << 11) / (playback_rate * 33 / 32);
+ // now precalculate env rates for S9xSetEnvRate
+ static int steps [] =
+ {
+ 0, 64, 619, 619, 128, 1, 64, 55, 64, 619
+ };
+
+ int i, u;
+
+ for (u = 0 ; u < 10 ; u++)
+ {
+ int64_t fp1000su = ((int64_t) FIXED_POINT * 1000 * steps[u]);
+
+ for (i = 0 ; i < 16 ; i++)
+ AttackERate[i][u] = (uint32_t) (fp1000su / (AttackRate[i] * playback_rate));
+
+ for (i = 0 ; i < 8 ; i++)
+ DecayERate[i][u] = (uint32_t) (fp1000su / (DecayRate[i] * playback_rate));
+
+ for (i = 0 ; i < 32 ; i++)
+ {
+ SustainERate[i][u] = (uint32_t) (fp1000su / (SustainRate[i] * playback_rate));
+ IncreaseERate[i][u] = (uint32_t) (fp1000su / (IncreaseRate[i] * playback_rate));
+ DecreaseERateExp[i][u] = (uint32_t) (fp1000su / (DecreaseRateExp[i] / 2 * playback_rate));
+ }
+
+ KeyOffERate[u] = (uint32_t) (fp1000su / (8 * playback_rate));
+ }
+ }
+
S9xSetEchoDelay(APU.DSP [APU_EDL] & 0xf);
int i;
for (i = 0; i < 8; i++)
@@ -1097,13 +943,8 @@ void S9xSetPlaybackRate(uint32_t playback_rate)
bool S9xInitSound()
{
- so.sound_fd = -1;
- so.sound_switch = 255;
-
so.playback_rate = 0;
- so.buffer_size = 0;
- so.encoded = false;
-
+ S9xResetSound(true);
return (1);
}
@@ -1120,20 +961,9 @@ bool S9xSetSoundMode(int channel, int mode)
return (true);
}
break;
-
case MODE_DECREASE_LINEAR:
case MODE_DECREASE_EXPONENTIAL:
case MODE_GAIN:
- if (ch->mode != MODE_RELEASE)
- {
- ch->mode = mode;
- if (ch->state != SOUND_SILENT)
- ch->state = mode;
-
- return (true);
- }
- break;
-
case MODE_INCREASE_LINEAR:
case MODE_INCREASE_BENT_LINE:
if (ch->mode != MODE_RELEASE)
@@ -1141,11 +971,9 @@ bool S9xSetSoundMode(int channel, int mode)
ch->mode = mode;
if (ch->state != SOUND_SILENT)
ch->state = mode;
-
return (true);
}
break;
-
case MODE_ADSR:
if (ch->mode == MODE_NONE || ch->mode == MODE_ADSR)
{
@@ -1157,11 +985,6 @@ bool S9xSetSoundMode(int channel, int mode)
return (false);
}
-void S9xSetSoundControl(int sound_switch)
-{
- so.sound_switch = sound_switch;
-}
-
void S9xPlaySample(int channel)
{
Channel* ch = &SoundData.channels[channel];
@@ -1202,14 +1025,14 @@ void S9xPlaySample(int channel)
{
ch->state = SOUND_SUSTAIN;
ch->envx = (MAX_ENVELOPE_HEIGHT * ch->sustain_level) >> 3;
- S9xSetEnvRate(ch, ch->sustain_rate, -1, 0);
+ S9xSetEnvRate(ch, ch->sustain_rate, -1, 0, 2 << 28);
}
else
{
ch->state = SOUND_DECAY;
ch->envx = MAX_ENVELOPE_HEIGHT;
S9xSetEnvRate(ch, ch->decay_rate, -1,
- (MAX_ENVELOPE_HEIGHT * ch->sustain_level) >> 3);
+ (MAX_ENVELOPE_HEIGHT * ch->sustain_level) >> 3, 1 << 28);
}
ch-> left_vol_level = (ch->envx * ch->volume_left) / 128;
ch->right_vol_level = (ch->envx * ch->volume_right) / 128;
@@ -1220,31 +1043,25 @@ void S9xPlaySample(int channel)
ch->envx = 0;
ch->left_vol_level = 0;
ch->right_vol_level = 0;
- S9xSetEnvRate(ch, ch->attack_rate, 1, MAX_ENVELOPE_HEIGHT);
+ S9xSetEnvRate(ch, ch->attack_rate, 1, MAX_ENVELOPE_HEIGHT, 0);
}
ch->envxx = ch->envx << ENVX_SHIFT;
break;
-
case MODE_GAIN:
ch->state = SOUND_GAIN;
break;
-
case MODE_INCREASE_LINEAR:
ch->state = SOUND_INCREASE_LINEAR;
break;
-
case MODE_INCREASE_BENT_LINE:
ch->state = SOUND_INCREASE_BENT_LINE;
break;
-
case MODE_DECREASE_LINEAR:
ch->state = SOUND_DECREASE_LINEAR;
break;
-
case MODE_DECREASE_EXPONENTIAL:
ch->state = SOUND_DECREASE_EXPONENTIAL;
break;
-
default:
break;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-04 21:52:22 +0000