ABelliqueux/nolibgs_hello_worlds
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Fix typos, colors, add redux notice

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ABelliqueux 2021-11-14 12:02:35 +01:00
parent 1cf7b7efa6
commit b6d1c1b2f7
2 changed files with 25 additions and 12 deletions
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5
hello_spu_readback/README.md
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@ -6,6 +6,11 @@ In this instance, it's used to determine the coordinates of a few primitives to
This technique is known to be used in certain games for lipsynching or audio visualization ( Crash team racing, Hercules, Vib Ribbon ...).
## pcsx-redux : no animation
Pcsx-redux does not yet support these specific SPU buffers nor triggerring IRQ from them so as of 11-2021 this example doesn't work in this particular emulator.
If looking for an alternative, check [duckstation](https://www.duckstation.org/) out.
## PsyQ's SpuReadDecodedData() doc errata
The main function for transferring data from the SPU to the RAM is `SpuReadDecodedData()`, and is documented in **LibRef47.pdf, p1054**.

32
hello_spu_readback/hello_spu_readback.c
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@ -71,9 +71,9 @@ POLY_F4 * current[BARNUM];
// Red : volume peak in the last 3 seconds
POLY_F4 * peak[BARNUM];
// Colors for the VU-metre
CVECTOR bg = {0,90,255};
CVECTOR fg = {255,190,0};
CVECTOR cursor = {255,40,0};
CVECTOR bg = {20, 10, 0};
CVECTOR fg = {10,200,20};
CVECTOR cursor = {200,40,10};
void init(void)
{
@ -133,10 +133,14 @@ void initPrimitives(void)
SetPolyF4 ( bar[i] );
setRGB0 ( bar[i], bg.r,bg.g,bg.b );
setXY4 ( bar[i],
MINBAR, BARTOP + i * MARGIN, /* NW */
MAXBAR, BARTOP + i * MARGIN, /* NE */
MINBAR, BARBOTTOM + i * MARGIN, /* SW */
MAXBAR, BARBOTTOM + i * MARGIN); /* SE */
// Top-left
MINBAR, BARTOP + i * MARGIN,
// Top-right
MAXBAR, BARTOP + i * MARGIN,
// Bottom-left
MINBAR, BARBOTTOM + i * MARGIN,
// Bottom-right
MAXBAR, BARBOTTOM + i * MARGIN);
// Current volume is light purple-ish
SetPolyF4 (current[i]);
@ -284,7 +288,7 @@ void findSampleMaxVolume(void)
int main(void)
{
// Values used to switch CD track after
// Values used to switch CD track
u_int counter = 0;
int8_t flip = 1;
// These will hold the normalised values of leftMax/rightMax, leftPeak/rightPeak
@ -349,11 +353,13 @@ int main(void)
// Those array will hold the return values of the CD commands
u_char param[4], result[8];
// Set CD parameters ; Report Mode ON, CD-DA ON. See LibeOver47.pdf, p.188
param[0] = CdlModeRept|CdlModeDA;
CdControlB (CdlSetmode, param, 0); /* set mode */
VSync (3); /* wait three vsync times */
param[0] = CdlModeRept|CdlModeDA;
// Set CD mode
CdControlB (CdlSetmode, param, 0);
// Wait 3 vsync
VSync (3);
// Play second track in toc array
CdControlB (CdlPlay, (u_char *)&loc[3], 0); /* play */
CdControlB (CdlPlay, (u_char *)&loc[3], 0);
// Graphics setup
initPrimitives();
while (1)
@ -368,6 +374,7 @@ int main(void)
rPeak = (rightPeak * 256) / 0x8000 + MINBAR;
// Update primitives XY coordinates
// Set coordinates for volume bar polygons
setXY4 ( current[LEFTBAR],
MINBAR, BARTOP,
lMax + TSIZE, BARTOP,
@ -378,6 +385,7 @@ int main(void)
rMax + TSIZE, BARTOP + MARGIN,
MINBAR, BARBOTTOM + MARGIN,
rMax + TSIZE, BARBOTTOM + MARGIN);
// Set coordinates for peak cursor polygons
setXY4 (peak[LEFTBAR],
lPeak, BARTOP,
lPeak + TSIZE, BARTOP,