ref: c76bf4cb46d92930413d34ee8b47dc2d0c2b856c
parent: 22a8376772b6e264828cbde7d478483288fa867d
author: Olav Sørensen <olav.sorensen@live.no>
date: Sat Dec 28 12:03:53 EST 2024
Small tracker scope optimization + code cleanup
--- a/src/ft2_audio.c
+++ b/src/ft2_audio.c
@@ -37,17 +37,6 @@
pattSync_t pattSync;
volatile bool pattQueueClearing, chQueueClearing;
-void resetCachedMixerVars(void)
-{- channel_t *ch = channel;
- for (int32_t i = 0; i < MAX_CHANNELS; i++, ch++)
- ch->oldFinalPeriod = -1;
-
- voice_t *v = voice;
- for (int32_t i = 0; i < MAX_CHANNELS*2; i++, v++)
- v->oldDelta = 0;
-}
-
void stopVoice(int32_t i)
{voice_t *v;
@@ -332,7 +321,7 @@
v->leftEdgeTaps8 = s->leftEdgeTapSamples8 + MAX_LEFT_TAPS;
}
- v->hasLooped = false; // for sinc interpolation special case
+ v->hasLooped = false; // for cubic/sinc interpolation special case
v->samplingBackwards = false;
v->loopType = loopType;
v->sampleEnd = (loopType == LOOP_OFF) ? length : loopEnd;
@@ -380,8 +369,8 @@
{v->fVolume = ch->fFinalVol;
- // scale volume for scopes (0..128)
- const int32_t scopeVolume = (int32_t)((ch->fFinalVol * 128.0f) + 0.5f); // rounded
+ // set scope volume (scaled)
+ const int32_t scopeVolume = (int32_t)((ch->fFinalVol * (SCOPE_HEIGHT*(1<<2))) + 0.5f); // rounded
v->scopeVolume = (uint8_t)scopeVolume;
}
@@ -393,32 +382,25 @@
if (status & IS_Period)
{- // use cached values when possible
- if (ch->finalPeriod != ch->oldFinalPeriod)
- {- ch->oldFinalPeriod = ch->finalPeriod;
+ const double dVoiceHz = dPeriod2Hz(ch->finalPeriod);
- const double dHz = dPeriod2Hz(ch->finalPeriod);
+ // set voice delta
+ v->delta = (int64_t)((dVoiceHz * audio.dHz2MixDeltaMul) + 0.5); // Hz -> fixed-point delta (rounded)
- // set voice delta
- const uint64_t delta = v->oldDelta = (int64_t)((dHz * audio.dHz2MixDeltaMul) + 0.5); // Hz -> fixed-point delta (rounded)
+ // set scope delta
+ const double dHz2ScopeDeltaMul = SCOPE_FRAC_SCALE / (double)SCOPE_HZ;
+ v->scopeDelta = (int64_t)((dVoiceHz * dHz2ScopeDeltaMul) + 0.5); // Hz -> fixed-point delta (rounded)
- if (audio.sincInterpolation) // decide which sinc LUT to use according to the resampling ratio
- {- if (delta <= sincDownsample1Ratio)
- v->fSincLUT = fKaiserSinc;
- else if (delta <= sincDownsample2Ratio)
- v->fSincLUT = fDownSample1;
- else
- v->fSincLUT = fDownSample2;
- }
-
- // set scope delta
- const double dHz2ScopeDeltaMul = SCOPE_FRAC_SCALE / (double)SCOPE_HZ;
- v->scopeDelta = (int64_t)((dHz * dHz2ScopeDeltaMul) + 0.5); // Hz -> fixed-point delta (rounded)
+ if (audio.sincInterpolation)
+ {+ // decide which sinc LUT to use according to the resampling ratio
+ if (v->delta <= sincDownsample1Ratio)
+ v->fSincLUT = fKaiserSinc;
+ else if (v->delta <= sincDownsample2Ratio)
+ v->fSincLUT = fDownSample1;
+ else
+ v->fSincLUT = fDownSample2;
}
-
- v->delta = v->oldDelta;
}
if (status & IS_Trigger)
@@ -431,8 +413,6 @@
int16_t *streamPtr16 = (int16_t *)stream;
for (uint32_t i = 0; i < sampleBlockLength; i++)
{- // TODO: This could use dithering (a proper implementation, that is...)
-
int32_t L = (int32_t)(audio.fMixBufferL[i] * fAudioNormalizeMul);
int32_t R = (int32_t)(audio.fMixBufferR[i] * fAudioNormalizeMul);
@@ -443,8 +423,7 @@
*streamPtr16++ = (int16_t)R;
// clear what we read from the mixing buffer
- audio.fMixBufferL[i] = 0.0f;
- audio.fMixBufferR[i] = 0.0f;
+ audio.fMixBufferL[i] = audio.fMixBufferR[i] = 0.0f;
}
}
@@ -460,8 +439,7 @@
*fStreamPtr32++ = CLAMP(fR, -1.0f, 1.0f);
// clear what we read from the mixing buffer
- audio.fMixBufferL[i] = 0.0f;
- audio.fMixBufferR[i] = 0.0f;
+ audio.fMixBufferL[i] = audio.fMixBufferR[i] = 0.0f;
}
}
--- a/src/ft2_audio.h
+++ b/src/ft2_audio.h
@@ -64,7 +64,7 @@
uint8_t mixFuncOffset, panning, loopType, scopeVolume;
int32_t position, sampleEnd, loopStart, loopLength, oldPeriod;
uint32_t volumeRampLength;
- uint64_t positionFrac, delta, oldDelta, scopeDelta;
+ uint64_t positionFrac, delta, scopeDelta;
// if (loopEnabled && hasLooped && samplingPos <= loopStart+MAX_LEFT_TAPS) readFixedTapsFromThisPointer();
const int8_t *leftEdgeTaps8;
@@ -109,7 +109,6 @@
chSyncData_t data[SYNC_QUEUE_LEN+1];
} chSync_t;
-void resetCachedMixerVars(void);
int32_t pattQueueReadSize(void);
int32_t pattQueueWriteSize(void);
bool pattQueuePush(pattSyncData_t t);
--- a/src/ft2_header.h
+++ b/src/ft2_header.h
@@ -12,7 +12,7 @@
#endif
#include "ft2_replayer.h"
-#define PROG_VER_STR "1.93"
+#define PROG_VER_STR "1.94"
// do NOT change these! It will only mess things up...
--- a/src/ft2_replayer.c
+++ b/src/ft2_replayer.c
@@ -403,7 +403,7 @@
audio.dHz2MixDeltaMul = (double)MIXER_FRAC_SCALE / audioFreq;
audio.quickVolRampSamples = (uint32_t)round(audioFreq / (1000.0 / FT2_QUICK_VOLRAMP_MILLISECONDS));
- audio.fQuickVolRampSamplesMul = (float)(1.0 / (double)audio.quickVolRampSamples);
+ audio.fQuickVolRampSamplesMul = (float)(1.0 / audio.quickVolRampSamples);
for (int32_t bpm = MIN_BPM; bpm <= MAX_BPM; bpm++)
{@@ -3131,7 +3131,6 @@
editor.curPlaySmp = 255;
stopAllScopes();
- resetCachedMixerVars();
// wait for scope thread to finish, making sure pointers aren't illegal
while (editor.scopeThreadBusy);
--- a/src/ft2_replayer.h
+++ b/src/ft2_replayer.h
@@ -194,9 +194,8 @@
typedef struct syncedChannel_t // used for audio/video sync queue (pack to save RAM)
{- uint8_t status, pianoNoteNum, smpNum, instrNum;
+ uint8_t status, pianoNoteNum, smpNum, instrNum, scopeVolume;
int32_t smpStartPos;
- uint8_t scopeVolume;
uint64_t scopeDelta;
}
#ifdef __GNUC__
@@ -256,7 +255,7 @@
uint16_t volEnvTick, panEnvTick, autoVibAmp, autoVibSweep;
uint16_t midiVibDepth;
int32_t fadeoutVol, fadeoutSpeed;
- int32_t oldFinalPeriod, smpStartPos;
+ int32_t smpStartPos;
float fFinalVol, fVolEnvDelta, fPanEnvDelta, fVolEnvValue, fPanEnvValue;
--- a/src/ft2_sample_ed.c
+++ b/src/ft2_sample_ed.c
@@ -3068,7 +3068,7 @@
if (editor.curInstr == ins && editor.curSmp == smp)
{- const int32_t smpPos = getSamplePosition(editor.curSmpChannel);
+ const int32_t smpPos = getSamplePositionFromScopes(editor.curSmpChannel);
if (smpPos != -1)
{// convert sample position to screen position
--- a/src/scopes/ft2_scope_macros.h
+++ b/src/scopes/ft2_scope_macros.h
@@ -2,7 +2,6 @@
#include <stdint.h>
#include "../ft2_header.h"
-#include "../mixer/ft2_windowed_sinc.h"
#include "ft2_scopes.h"
/* ----------------------------------------------------------------------- */
@@ -9,10 +8,7 @@
/* SCOPE DRAWING MACROS */
/* ----------------------------------------------------------------------- */
-#define SCOPE_REGS_NO_LOOP \
- const int32_t volume = s->volume * SCOPE_HEIGHT; \
- const int32_t sampleEnd = s->sampleEnd; \
- const uint64_t delta = s->drawDelta; \
+#define SCOPE_INIT \
const uint32_t color = video.palette[PAL_PATTEXT]; \
uint32_t width = x + w; \
int32_t sample; \
@@ -19,151 +15,145 @@
int32_t position = s->position; \
uint64_t positionFrac = 0;
-#define SCOPE_REGS_LOOP \
- const int32_t volume = s->volume * SCOPE_HEIGHT; \
- const int32_t sampleEnd = s->sampleEnd; \
- const int32_t loopStart = s->loopStart; \
- const int32_t loopLength = s->loopLength; \
- const uint64_t delta = s->drawDelta; \
+#define SCOPE_INIT_BIDI \
const uint32_t color = video.palette[PAL_PATTEXT]; \
uint32_t width = x + w; \
int32_t sample; \
- int32_t position = s->position; \
- uint64_t positionFrac = 0;
-
-#define SCOPE_REGS_BIDI \
- const int32_t volume = s->volume * SCOPE_HEIGHT; \
- const int32_t sampleEnd = s->sampleEnd; \
- const int32_t loopStart = s->loopStart; \
- const int32_t loopLength = s->loopLength; \
- const uint64_t delta = s->drawDelta; \
- const uint32_t color = video.palette[PAL_PATTEXT]; \
- uint32_t width = x + w; \
- int32_t sample; \
int32_t actualPos, position = s->position; \
uint64_t positionFrac = 0; \
bool samplingBackwards = s->samplingBackwards;
-#define LINED_SCOPE_REGS_NO_LOOP \
- SCOPE_REGS_NO_LOOP \
+#define LINED_SCOPE_INIT \
+ SCOPE_INIT \
int32_t smpY1, smpY2; \
width--;
-#define LINED_SCOPE_REGS_LOOP \
- SCOPE_REGS_LOOP \
+#define LINED_SCOPE_INIT_BIDI \
+ SCOPE_INIT_BIDI \
int32_t smpY1, smpY2; \
width--;
-#define LINED_SCOPE_REGS_BIDI \
- SCOPE_REGS_BIDI \
- int32_t smpY1, smpY2; \
- width--;
-
/* Note: Sample data already has fixed tap samples at the end of the sample,
** so that out-of-bounds reads get the correct interpolation tap data.
*/
+#define NEAREST_NEIGHGBOR8 \
+{ \+ sample = s8[0] << 8; \
+} \
+
+#define LINEAR_INTERPOLATION8(frac) \
+{ \+ const int32_t f = (frac) >> (SCOPE_FRAC_BITS-15); \
+ sample = (s8[0] << 8) + ((((s8[1] - s8[0]) << 8) * f) >> 15); \
+} \
+
+#define NEAREST_NEIGHGBOR16 \
+{ \+ sample = s16[0]; \
+} \
+
+#define LINEAR_INTERPOLATION16(frac) \
+{ \+ const int32_t f = (frac) >> (SCOPE_FRAC_BITS-15); \
+ sample = s16[0] + (((s16[1] - s16[0]) * f) >> 15); \
+} \
+
+#define CUBIC_SMP8(frac) \
+ const int16_t *t = scopeIntrpLUT + (((frac) >> (SCOPE_FRAC_BITS-SCOPE_INTRP_PHASES_BITS)) * SCOPE_INTRP_TAPS); \
+ \
+ sample = ((s8[-2] * t[0]) + \
+ (s8[-1] * t[1]) + \
+ ( s8[0] * t[2]) + \
+ ( s8[1] * t[3]) + \
+ ( s8[2] * t[4]) + \
+ ( s8[3] * t[5])) >> (SCOPE_INTRP_SCALE_BITS-8);
+
+#define CUBIC_SMP16(frac) \
+ const int16_t *t = scopeIntrpLUT + (((frac) >> (SCOPE_FRAC_BITS-SCOPE_INTRP_PHASES_BITS)) * SCOPE_INTRP_TAPS); \
+ \
+ sample = ((s16[-2] * t[0]) + \
+ (s16[-1] * t[1]) + \
+ ( s16[0] * t[2]) + \
+ ( s16[1] * t[3]) + \
+ ( s16[2] * t[4]) + \
+ ( s16[3] * t[5])) >> SCOPE_INTRP_SCALE_BITS;
+
+#define CUBIC_INTERPOLATION8(frac) \
+{ \+ CUBIC_SMP8(frac) \
+} \
+
+#define CUBIC_INTERPOLATION16(frac) \
+{ \+ CUBIC_SMP16(frac) \
+} \
+
+#define CUBIC_INTERPOLATION8_LOOP(pos, frac) \
+{ \+ if (s->hasLooped && pos <= s->loopStart+MAX_LEFT_TAPS) \
+ s8 = s->leftEdgeTaps8 + (pos - s->loopStart); \
+ \
+ CUBIC_SMP8(frac) \
+} \
+
+#define CUBIC_INTERPOLATION16_LOOP(pos, frac) \
+{ \+ if (s->hasLooped && pos <= s->loopStart+MAX_LEFT_TAPS) \
+ s16 = s->leftEdgeTaps16 + (pos - s->loopStart); \
+ \
+ CUBIC_SMP16(frac) \
+} \
+
#define INTERPOLATE_SMP8(pos, frac) \
const int8_t *s8 = s->base8 + pos; \
if (config.interpolation == INTERPOLATION_DISABLED) \
- { \- sample = s8[0] << 8; \
- } \
+ NEAREST_NEIGHGBOR8 \
else if (config.interpolation == INTERPOLATION_LINEAR) \
- { \- const int32_t f = (frac) >> (SCOPE_FRAC_BITS-15); \
- sample = (s8[0] << 8) + ((((s8[1] - s8[0]) << 8) * f) >> 15); \
- } \
- else /* interpolate scopes using 6-tap cubic B-spline */ \
- { \- const float *t = fScopeIntrpLUT + (((frac) >> (SCOPE_FRAC_BITS-SCOPE_INTRP_PHASES_BITS)) * SCOPE_INTRP_TAPS); \
- \
- /* get correct negative tap sample points */ \
- int32_t p1 = pos - 2; \
- int32_t p2 = pos - 1; \
- float fSample; \
- if (s->loopType != LOOP_DISABLED && s->hasLooped && (int32_t)pos-2 < (int32_t)s->loopStart) \
- { \- const int32_t overflow1 = (int32_t)s->loopStart - p1; \
- const int32_t overflow2 = (int32_t)s->loopStart - p2; \
- if (s->loopType == LOOP_BIDI) /* direction is always backwards at this point */ \
- { \- p1 = s->loopStart + overflow1; \
- if (overflow2 > 0) \
- p2 = s->loopStart + overflow2; \
- } \
- else \
- { \- p1 = s->loopEnd - overflow1; \
- if (overflow2 > 0) \
- p2 = s->loopEnd - overflow2; \
- } \
- } \
- \
- fSample = (s->base8[p1] * t[0]) + \
- (s->base8[p2] * t[1]) + \
- ( s8[0] * t[2]) + \
- ( s8[1] * t[3]) + \
- ( s8[2] * t[4]) + \
- ( s8[3] * t[5]); \
- sample = (int32_t)(fSample * 256.0f); \
- }
+ LINEAR_INTERPOLATION8(frac) \
+ else \
+ CUBIC_INTERPOLATION8(frac) \
+ sample = (sample * s->volume) >> (16+2);
#define INTERPOLATE_SMP16(pos, frac) \
const int16_t *s16 = s->base16 + pos; \
if (config.interpolation == INTERPOLATION_DISABLED) \
- { \- sample = s16[0]; \
- } \
+ NEAREST_NEIGHGBOR16 \
else if (config.interpolation == INTERPOLATION_LINEAR) \
- { \- const int32_t f = (frac) >> (SCOPE_FRAC_BITS-15); \
- sample = s16[0] + (((s16[1] - s16[0]) * f) >> 15); \
- } \
- else /* interpolate scopes using 6-tap cubic B-spline */ \
- { \- const float *t = fScopeIntrpLUT + (((frac) >> (SCOPE_FRAC_BITS-SCOPE_INTRP_PHASES_BITS)) * SCOPE_INTRP_TAPS); \
- \
- /* get correct negative tap sample points */ \
- int32_t p1 = pos - 2; \
- int32_t p2 = pos - 1; \
- float fSample; \
- if (s->loopType != LOOP_DISABLED && s->hasLooped && (int32_t)pos-2 < (int32_t)s->loopStart) \
- { \- const int32_t overflow1 = (int32_t)s->loopStart - p1; \
- const int32_t overflow2 = (int32_t)s->loopStart - p2; \
- if (s->loopType == LOOP_BIDI) /* direction is always backwards at this point */ \
- { \- p1 = s->loopStart + overflow1; \
- if (overflow2 > 0) \
- p2 = s->loopStart + overflow2; \
- } \
- else \
- { \- p1 = s->loopEnd - overflow1; \
- if (overflow2 > 0) \
- p2 = s->loopEnd - overflow2; \
- } \
- } \
- \
- fSample = (s->base16[p1] * t[0]) + \
- (s->base16[p2] * t[1]) + \
- ( s16[0] * t[2]) + \
- ( s16[1] * t[3]) + \
- ( s16[2] * t[4]) + \
- ( s16[3] * t[5]); \
- \
- sample = (int32_t)fSample; \
- }
+ LINEAR_INTERPOLATION16(frac) \
+ else \
+ CUBIC_INTERPOLATION16(frac) \
+ sample = (sample * s->volume) >> (16+2);
+
+#define INTERPOLATE_SMP8_LOOP(pos, frac) \
+ const int8_t *s8 = s->base8 + pos; \
+ if (config.interpolation == INTERPOLATION_DISABLED) \
+ NEAREST_NEIGHGBOR8 \
+ else if (config.interpolation == INTERPOLATION_LINEAR) \
+ LINEAR_INTERPOLATION8(frac) \
+ else \
+ CUBIC_INTERPOLATION8_LOOP(pos, frac) \
+ sample = (sample * s->volume) >> (16+2);
+
+#define INTERPOLATE_SMP16_LOOP(pos, frac) \
+ const int16_t *s16 = s->base16 + pos; \
+ if (config.interpolation == INTERPOLATION_DISABLED) \
+ NEAREST_NEIGHGBOR16 \
+ else if (config.interpolation == INTERPOLATION_LINEAR) \
+ LINEAR_INTERPOLATION16(frac) \
+ else \
+ CUBIC_INTERPOLATION16_LOOP(pos, frac) \
+ sample = (sample * s->volume) >> (16+2);
+
#define SCOPE_GET_SMP8 \
if (s->active) \
- sample = (s->base8[position] * volume) >> (8+7); \
+ sample = (s->base8[position] * s->volume) >> (8+2); \
else \
sample = 0;
#define SCOPE_GET_SMP16 \
if (s->active) \
- sample = (s->base16[position] * volume) >> (16+7); \
+ sample = (s->base16[position] * s->volume) >> (16+2); \
else \
sample = 0;
@@ -171,7 +161,7 @@
if (s->active) \
{ \GET_BIDI_POSITION \
- sample = (s->base8[actualPos] * volume) >> (8+7); \
+ sample = (s->base8[actualPos] * s->volume) >> (8+2); \
} \
else \
{ \@@ -182,7 +172,7 @@
if (s->active) \
{ \GET_BIDI_POSITION \
- sample = (s->base16[actualPos] * volume) >> (16+7); \
+ sample = (s->base16[actualPos] * s->volume) >> (16+2); \
} \
else \
{ \@@ -193,7 +183,6 @@
if (s->active) \
{ \INTERPOLATE_SMP8(position, (uint32_t)positionFrac) \
- sample = (sample * volume) >> (16+7); \
} \
else \
{ \@@ -204,7 +193,6 @@
if (s->active) \
{ \INTERPOLATE_SMP16(position, (uint32_t)positionFrac) \
- sample = (sample * volume) >> (16+7); \
} \
else \
{ \@@ -211,9 +199,29 @@
sample = 0; \
}
+#define SCOPE_GET_INTERPOLATED_SMP8_LOOP \
+ if (s->active) \
+ { \+ INTERPOLATE_SMP8_LOOP(position, (uint32_t)positionFrac) \
+ } \
+ else \
+ { \+ sample = 0; \
+ }
+
+#define SCOPE_GET_INTERPOLATED_SMP16_LOOP \
+ if (s->active) \
+ { \+ INTERPOLATE_SMP16_LOOP(position, (uint32_t)positionFrac) \
+ } \
+ else \
+ { \+ sample = 0; \
+ }
+
#define GET_BIDI_POSITION \
if (samplingBackwards) \
- actualPos = (sampleEnd - 1) - (position - loopStart); \
+ actualPos = (s->sampleEnd - 1) - (position - s->loopStart); \
else \
actualPos = position;
@@ -221,8 +229,7 @@
if (s->active) \
{ \GET_BIDI_POSITION \
- INTERPOLATE_SMP8(actualPos, samplingBackwards ? ((uint32_t)positionFrac ^ UINT32_MAX) : (uint32_t)positionFrac) \
- sample = (sample * volume) >> (16+7); \
+ INTERPOLATE_SMP8_LOOP(actualPos, samplingBackwards ? ((uint32_t)positionFrac ^ UINT32_MAX) : (uint32_t)positionFrac) \
} \
else \
{ \@@ -233,8 +240,7 @@
if (s->active) \
{ \GET_BIDI_POSITION \
- INTERPOLATE_SMP16(actualPos, samplingBackwards ? ((uint32_t)positionFrac ^ UINT32_MAX) : (uint32_t)positionFrac) \
- sample = (sample * volume) >> (16+7); \
+ INTERPOLATE_SMP16_LOOP(actualPos, samplingBackwards ? ((uint32_t)positionFrac ^ UINT32_MAX) : (uint32_t)positionFrac) \
} \
else \
{ \@@ -242,7 +248,7 @@
}
#define SCOPE_UPDATE_READPOS \
- positionFrac += delta; \
+ positionFrac += s->drawDelta; \
position += positionFrac >> 32; \
positionFrac &= UINT32_MAX;
@@ -259,6 +265,16 @@
smpY1 = lineY - sample; \
SCOPE_UPDATE_READPOS
+#define LINED_SCOPE_PREPARE_SMP8_LOOP \
+ SCOPE_GET_INTERPOLATED_SMP8_LOOP \
+ smpY1 = lineY - sample; \
+ SCOPE_UPDATE_READPOS
+
+#define LINED_SCOPE_PREPARE_SMP16_LOOP \
+ SCOPE_GET_INTERPOLATED_SMP16_LOOP \
+ smpY1 = lineY - sample; \
+ SCOPE_UPDATE_READPOS
+
#define LINED_SCOPE_PREPARE_SMP8_BIDI \
SCOPE_GET_INTERPOLATED_SMP8_BIDI \
smpY1 = lineY - sample; \
@@ -275,34 +291,35 @@
smpY1 = smpY2;
#define SCOPE_HANDLE_POS_NO_LOOP \
- if (position >= sampleEnd) \
+ if (position >= s->sampleEnd) \
s->active = false;
#define SCOPE_HANDLE_POS_LOOP \
- if (position >= sampleEnd) \
+ if (position >= s->sampleEnd) \
{ \- if (loopLength >= 2) \
- position = loopStart + ((position - sampleEnd) % loopLength); \
+ if (s->loopLength >= 2) \
+ position = s->loopStart + ((uint32_t)(position - s->sampleEnd) % (uint32_t)s->loopLength); \
else \
- position = loopStart; \
+ position = s->loopStart; \
\
s->hasLooped = true; \
}
#define SCOPE_HANDLE_POS_BIDI \
- if (position >= sampleEnd) \
+ if (position >= s->sampleEnd) \
{ \- if (loopLength >= 2) \
+ if (s->loopLength >= 2) \
{ \- const uint32_t overflow = position - sampleEnd; \
- const uint32_t cycles = overflow / loopLength; \
- const uint32_t phase = overflow % loopLength; \
- position = loopStart + phase; \
+ const uint32_t overflow = position - s->sampleEnd; \
+ const uint32_t cycles = overflow / (uint32_t)s->loopLength; \
+ const uint32_t phase = overflow % (uint32_t)s->loopLength; \
+ \
+ position = s->loopStart + phase; \
samplingBackwards ^= !(cycles & 1); \
} \
else \
{ \- position = loopStart; \
+ position = s->loopStart; \
} \
\
s->hasLooped = true; \
--- a/src/scopes/ft2_scopedraw.c
+++ b/src/scopes/ft2_scopedraw.c
@@ -10,18 +10,25 @@
#include "ft2_scopedraw.h"
#include "ft2_scope_macros.h"
-static float *fScopeIntrpLUT;
+static int16_t *scopeIntrpLUT;
-static void scopeLine(int32_t x1, int32_t y1, int32_t y2, uint32_t color);
+static void scopeLine(int32_t x1, int32_t y1, int32_t y2, const uint32_t color);
bool calcScopeIntrpLUT(void)
{- fScopeIntrpLUT = (float *)malloc(SCOPE_INTRP_TAPS * SCOPE_INTRP_PHASES * sizeof (float));
- if (fScopeIntrpLUT == NULL)
+ scopeIntrpLUT = (int16_t *)malloc(SCOPE_INTRP_TAPS * SCOPE_INTRP_PHASES * sizeof (int16_t));
+ if (scopeIntrpLUT == NULL)
return false;
- // 6-point cubic B-spline (No overshoot w/ low filter cut-off. Very suitable for scopes.)
- float *fPtr = fScopeIntrpLUT;
+ /* Several tests have been done to figure out what interpolation method is most suitable
+ ** for the tracker scopes. After testing linear, cubic, Gaussian and windowed-sinc
+ ** interpolation, I have come to the conclusion that 6-point cubic B-spline is the best.
+ ** This interpolation method also has no overshoot.
+ */
+
+ // 6-point cubic B-spline (no overshoot)
+
+ int16_t *ptr16 = scopeIntrpLUT;
for (int32_t i = 0; i < SCOPE_INTRP_PHASES; i++)
{const double x1 = i * (1.0 / SCOPE_INTRP_PHASES);
@@ -37,12 +44,13 @@
double t5 = (-(1.0/ 24.0) * x5) + ( (1.0/24.0) * x4) + ( (1.0/12.0) * x3) + ( (1.0/12.0) * x2) + ( (1.0/24.0) * x1) + ( 1.0/120.0);
double t6 = (1.0/120.0) * x5;
- *fPtr++ = (float)t1;
- *fPtr++ = (float)t2;
- *fPtr++ = (float)t3;
- *fPtr++ = (float)t4;
- *fPtr++ = (float)t5;
- *fPtr++ = (float)t6;
+ // important: truncate, do not round (would cause scope overflow)
+ *ptr16++ = (int16_t)(t1 * SCOPE_INTRP_SCALE);
+ *ptr16++ = (int16_t)(t2 * SCOPE_INTRP_SCALE);
+ *ptr16++ = (int16_t)(t3 * SCOPE_INTRP_SCALE);
+ *ptr16++ = (int16_t)(t4 * SCOPE_INTRP_SCALE);
+ *ptr16++ = (int16_t)(t5 * SCOPE_INTRP_SCALE);
+ *ptr16++ = (int16_t)(t6 * SCOPE_INTRP_SCALE);
}
return true;
@@ -50,20 +58,20 @@
void freeScopeIntrpLUT(void)
{- if (fScopeIntrpLUT != NULL)
+ if (scopeIntrpLUT != NULL)
{- free(fScopeIntrpLUT);
- fScopeIntrpLUT = NULL;
+ free(scopeIntrpLUT);
+ scopeIntrpLUT = NULL;
}
}
/* ----------------------------------------------------------------------- */
-/* SCOPE DRAWING ROUTINES */
+/* NON-LINED SCOPE DRAWING ROUTINES */
/* ----------------------------------------------------------------------- */
static void scopeDrawNoLoop_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{- SCOPE_REGS_NO_LOOP
+ SCOPE_INIT
for (; x < width; x++)
{@@ -76,7 +84,7 @@
static void scopeDrawLoop_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{- SCOPE_REGS_LOOP
+ SCOPE_INIT
for (; x < width; x++)
{@@ -87,9 +95,9 @@
}
}
-static void scopeDrawPingPong_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
+static void scopeDrawBidiLoop_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{- SCOPE_REGS_BIDI
+ SCOPE_INIT_BIDI
for (; x < width; x++)
{@@ -102,7 +110,7 @@
static void scopeDrawNoLoop_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{- SCOPE_REGS_NO_LOOP
+ SCOPE_INIT
for (; x < width; x++)
{@@ -115,7 +123,7 @@
static void scopeDrawLoop_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{- SCOPE_REGS_LOOP
+ SCOPE_INIT
for (; x < width; x++)
{@@ -126,9 +134,9 @@
}
}
-static void scopeDrawPingPong_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
+static void scopeDrawBidiLoop_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{- SCOPE_REGS_BIDI
+ SCOPE_INIT_BIDI
for (; x < width; x++)
{@@ -140,12 +148,12 @@
}
/* ----------------------------------------------------------------------- */
-/* INTERPOLATED SCOPE DRAWING ROUTINES */
+/* LINED SCOPE DRAWING ROUTINES */
/* ----------------------------------------------------------------------- */
static void linedScopeDrawNoLoop_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{- LINED_SCOPE_REGS_NO_LOOP
+ LINED_SCOPE_INIT
LINED_SCOPE_PREPARE_SMP8
SCOPE_HANDLE_POS_NO_LOOP
@@ -160,13 +168,13 @@
static void linedScopeDrawLoop_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{- LINED_SCOPE_REGS_LOOP
- LINED_SCOPE_PREPARE_SMP8
+ LINED_SCOPE_INIT
+ LINED_SCOPE_PREPARE_SMP8_LOOP
SCOPE_HANDLE_POS_LOOP
for (; x < width; x++)
{- SCOPE_GET_INTERPOLATED_SMP8
+ SCOPE_GET_INTERPOLATED_SMP8_LOOP
LINED_SCOPE_DRAW_SMP
SCOPE_UPDATE_READPOS
SCOPE_HANDLE_POS_LOOP
@@ -173,9 +181,9 @@
}
}
-static void linedScopeDrawPingPong_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
+static void linedScopeDrawBidiLoop_8bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{- LINED_SCOPE_REGS_BIDI
+ LINED_SCOPE_INIT_BIDI
LINED_SCOPE_PREPARE_SMP8_BIDI
SCOPE_HANDLE_POS_BIDI
@@ -190,7 +198,7 @@
static void linedScopeDrawNoLoop_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{- LINED_SCOPE_REGS_NO_LOOP
+ LINED_SCOPE_INIT
LINED_SCOPE_PREPARE_SMP16
SCOPE_HANDLE_POS_NO_LOOP
@@ -205,13 +213,13 @@
static void linedScopeDrawLoop_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{- LINED_SCOPE_REGS_LOOP
- LINED_SCOPE_PREPARE_SMP16
+ LINED_SCOPE_INIT
+ LINED_SCOPE_PREPARE_SMP16_LOOP
SCOPE_HANDLE_POS_LOOP
for (; x < width; x++)
{- SCOPE_GET_INTERPOLATED_SMP16
+ SCOPE_GET_INTERPOLATED_SMP16_LOOP
LINED_SCOPE_DRAW_SMP
SCOPE_UPDATE_READPOS
SCOPE_HANDLE_POS_LOOP
@@ -218,9 +226,9 @@
}
}
-static void linedScopeDrawPingPong_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
+static void linedScopeDrawBidiLoop_16bit(scope_t *s, uint32_t x, uint32_t lineY, uint32_t w)
{- LINED_SCOPE_REGS_BIDI
+ LINED_SCOPE_INIT_BIDI
LINED_SCOPE_PREPARE_SMP16_BIDI
SCOPE_HANDLE_POS_BIDI
@@ -235,42 +243,60 @@
// -----------------------------------------------------------------------
-static void scopeLine(int32_t x1, int32_t y1, int32_t y2, uint32_t color)
+static void scopeLine(int32_t x1, int32_t y1, int32_t y2, const uint32_t color)
{- const int32_t dy = y2 - y1;
- const int32_t sy = SGN(dy);
- const int32_t pitch = sy * SCREEN_W;
+#ifdef _DEBUG
+ if (x1 < 0 || x1 >= SCREEN_W || y1 < 0 || y1 >= SCREEN_H || y2 < 0 || y2 >= SCREEN_H)
+ return;
+#endif
uint32_t *dst32 = &video.frameBuffer[(y1 * SCREEN_W) + x1];
*dst32 = color; // set first pixel
- int32_t ay = ABS(dy);
- if (ay <= 1)
+ const int32_t dy = y2 - y1;
+ if (dy == 0) // y1 == y2
{- if (ay != 0)
- dst32 += pitch;
-
- *++dst32 = color;
+ dst32[1] = color;
return;
}
+ uint32_t ay = ABS(dy);
int32_t d = 1 - ay;
ay <<= 1;
- while (y1 != y2)
+
+ if (y1 > y2)
{- if (d >= 0)
+ for (; y1 != y2; y1--)
{- d -= ay;
- dst32++;
+ if (d >= 0)
+ {+ d -= ay;
+ dst32++;
+ }
+
+ d += 2;
+
+ dst32 -= SCREEN_W;
+ *dst32 = color;
}
+ }
+ else
+ {+ for (; y1 != y2; y1++)
+ {+ if (d >= 0)
+ {+ d -= ay;
+ dst32++;
+ }
- y1 += sy;
- d += 2;
+ d += 2;
- dst32 += pitch;
- *dst32 = color;
+ dst32 += SCREEN_W;
+ *dst32 = color;
+ }
}
}
@@ -280,14 +306,14 @@
{(scopeDrawRoutine)scopeDrawNoLoop_8bit,
(scopeDrawRoutine)scopeDrawLoop_8bit,
- (scopeDrawRoutine)scopeDrawPingPong_8bit,
+ (scopeDrawRoutine)scopeDrawBidiLoop_8bit,
(scopeDrawRoutine)scopeDrawNoLoop_16bit,
(scopeDrawRoutine)scopeDrawLoop_16bit,
- (scopeDrawRoutine)scopeDrawPingPong_16bit,
+ (scopeDrawRoutine)scopeDrawBidiLoop_16bit,
(scopeDrawRoutine)linedScopeDrawNoLoop_8bit,
(scopeDrawRoutine)linedScopeDrawLoop_8bit,
- (scopeDrawRoutine)linedScopeDrawPingPong_8bit,
+ (scopeDrawRoutine)linedScopeDrawBidiLoop_8bit,
(scopeDrawRoutine)linedScopeDrawNoLoop_16bit,
(scopeDrawRoutine)linedScopeDrawLoop_16bit,
- (scopeDrawRoutine)linedScopeDrawPingPong_16bit
+ (scopeDrawRoutine)linedScopeDrawBidiLoop_16bit
};
--- a/src/scopes/ft2_scopedraw.h
+++ b/src/scopes/ft2_scopedraw.h
@@ -9,4 +9,3 @@
bool calcScopeIntrpLUT(void);
void freeScopeIntrpLUT(void);
-
--- a/src/scopes/ft2_scopes.c
+++ b/src/scopes/ft2_scopes.c
@@ -31,29 +31,22 @@
lastChInstr_t lastChInstr[MAX_CHANNELS]; // global
-int32_t getSamplePosition(uint8_t ch)
+int32_t getSamplePositionFromScopes(uint8_t ch)
{if (ch >= song.numChannels)
return -1;
- volatile scope_t *sc = &scope[ch];
+ volatile scope_t sc = scope[ch]; // cache it
- // cache some stuff
- volatile bool active = sc->active;
- volatile bool samplingBackwards = sc->samplingBackwards;
- volatile int32_t position = sc->position;
- volatile int32_t loopStart = sc->loopStart;
- volatile int32_t sampleEnd = sc->sampleEnd;
-
- if (!active || sampleEnd == 0)
+ if (!sc.active || sc.sampleEnd == 0)
return -1;
- if (position >= 0 && position < sampleEnd)
+ if (sc.position >= 0 && sc.position < sc.sampleEnd)
{- if (samplingBackwards) // get actual bidi pos when in backwards mode
- position = (sampleEnd - 1) - (position - loopStart);
+ if (sc.samplingBackwards) // get actual bidi pos when in backwards mode
+ sc.position = (sc.sampleEnd - 1) - (sc.position - sc.loopStart);
- return position;
+ return sc.position;
}
return -1; // not active or overflown
@@ -308,9 +301,15 @@
loopType = 0;
if (sample16Bit)
+ {tempState.base16 = (const int16_t *)s->dataPtr;
+ tempState.leftEdgeTaps16 = s->leftEdgeTapSamples16 + MAX_LEFT_TAPS;
+ }
else
+ {tempState.base8 = s->dataPtr;
+ tempState.leftEdgeTaps8 = s->leftEdgeTapSamples8 + MAX_LEFT_TAPS;
+ }
tempState.sample16Bit = sample16Bit;
tempState.loopType = loopType;
@@ -428,7 +427,7 @@
continue;
}
- scope_t s = scope[i]; // cache scope to lower thread race condition issues
+ volatile scope_t s = scope[i]; // cache scope to lower thread race condition issues
if (s.active && s.volume > 0 && !audio.locked)
{// scope is active
@@ -442,7 +441,7 @@
// draw scope
bool linedScopesFlag = !!(config.specialFlags & LINED_SCOPES);
- scopeDrawRoutineTable[(linedScopesFlag * 6) + (s.sample16Bit * 3) + s.loopType](&s, scopeXOffs, scopeLineY, scopeDrawLen);
+ scopeDrawRoutineTable[(linedScopesFlag * 6) + (s.sample16Bit * 3) + s.loopType]((const scope_t *)&s, scopeXOffs, scopeLineY, scopeDrawLen);
}
else
{--- a/src/scopes/ft2_scopes.h
+++ b/src/scopes/ft2_scopes.h
@@ -11,10 +11,6 @@
*/
#define SCOPE_HZ 64
-#define SCOPE_INTRP_TAPS 6
-#define SCOPE_INTRP_PHASES 512 /* plentiful for a small scope window */
-#define SCOPE_INTRP_PHASES_BITS 9 /* log2(SCOPE_INTRP_PHASES) */
-
#define SCOPE_HEIGHT 36
#define SCOPE_FRAC_BITS 32
@@ -21,7 +17,13 @@
#define SCOPE_FRAC_SCALE ((int64_t)1 << SCOPE_FRAC_BITS)
#define SCOPE_FRAC_MASK (SCOPE_FRAC_SCALE-1)
-int32_t getSamplePosition(uint8_t ch);
+#define SCOPE_INTRP_TAPS 6
+#define SCOPE_INTRP_SCALE 32768
+#define SCOPE_INTRP_SCALE_BITS 15 /* log2(SCOPE_INTRP_SCALE) */
+#define SCOPE_INTRP_PHASES 512 /* plentiful for FT2-styled scopes */
+#define SCOPE_INTRP_PHASES_BITS 9 /* log2(SCOPE_INTRP_PHASES) */
+
+int32_t getSamplePositionFromScopes(uint8_t ch);
void stopAllScopes(void);
void refreshScopes(void);
bool testScopesMouseDown(void);
@@ -39,6 +41,10 @@
uint8_t loopType;
int32_t volume, loopStart, loopLength, loopEnd, sampleEnd, position;
uint64_t delta, drawDelta, positionFrac;
+
+ // if (loopEnabled && hasLooped && samplingPos <= loopStart+MAX_LEFT_TAPS) readFixedTapsFromThisPointer();
+ const int8_t *leftEdgeTaps8;
+ const int16_t *leftEdgeTaps16;
} scope_t;
typedef struct lastChInstr_t
--
⑨