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@PH3NOM-PRO
PH3NOM-PRO committed Aug 23, 2020
1 parent 62c37b8 commit a2254fe
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43 changes: 43 additions & 0 deletions CODECS.txt
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Dreamcast Media Center v.2.0 (C) 2011-2013 Josh PH3NOM Pearson

MP4/AAC Audio Codec:
-M4A Audio (.m4a)
-AAC Audio (.aac)
-MP4 Audio (.mp4)
-iTunes Audio Supported

MP3 Audio Codec:
-MP3 Audio (.mp3)

FLAC Audio Codec:
-FLAC Audio (.flac)( Audio Player is hardcoded to 16bit )

Dolby-Digital Audio Codec:
-AC3 Audio (.ac3)( Audio Player is hardcoded to 44.1kHz Stereo )

ADX Audio Codec:
-ADX Audio (.adx)
-SFA Audio ( used in SOFDEC video )

Mpeg2 Video Codec:
-MPEG2 Video (.mpg)( mp2 or mp3 audio )
-MPEG1 Video (.mpg)( mp2 or mp3 audio )
-SOFDEC Video (.sfd)( adx audio, experimental )

XviD Video Codec:
-AVI Video (.avi)( mp3 or ac3 audio up to 6ch )
-DivX Video (.avi)( mp3 or ac3 audio up to 6ch )

Image Codecs: ( maximum 1024x1024 resolution )
-JPG Image
-PNG Image
-PVR Texture

Applications:
-Unsrcrambled binary loader

LIMITATIONS:
-On an SD Card, maximum bitrate for any media file is ~656kbps.
-On a CD, maximum bitrate for video files is ~1.4mbps


176 changes: 176 additions & 0 deletions GL/gl-clip.h
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/*
** Gl-Clip.h (C) Josh PH3NOM Pearson 2013
** *Currently not working or implemented into the library
*/

#ifndef GL_CLIP_H
#define GL_CLIP_H

#define NONE 0x0000 /* Clip Codes */
#define FIRST 0x0001
#define SECOND 0x0010
#define THIRD 0x0100
#define ALL 0x0111
#define FIRST_TWO_OUT 0x0011
#define FIRST_AND_LAST_OUT 0x0101
#define LAST_TWO_OUT 0x0110

#define ALPHA 0xFF000000 /* Color Components using PVR's Packed 32bit int */
#define RED 0x00FF0000
#define GREEN 0x0000FF00
#define BLUE 0x000000FF

#define CLIP_ZNEAR 0.00001
#define CLIPZ 0x0F

inline void VertexCopy( pvr_vertex_t *src, pvr_vertex_t *dst )
{
*dst = *src;
}

inline void VertexClipZNear( pvr_vertex_t *v1, pvr_vertex_t *v2 )
{
float MAG = (CLIP_ZNEAR - v1->z)/(v2->z-v1->z); /* Magnitude */

/* Extract Color Components, Apply Linear Interpolation, then Pack it up */
BYTE a1 = (v1->argb & ALPHA)>>24;
BYTE r1 = (v1->argb & RED)>>16;
BYTE g1 = (v1->argb & GREEN)>>8;
BYTE b1 = (v1->argb & BLUE)>>0;
BYTE a2 = (v2->argb & ALPHA)>>24;
BYTE r2 = (v2->argb & RED)>>16;
BYTE g2 = (v2->argb & GREEN)>>8;
BYTE b2 = (v2->argb & BLUE)>>0;
BYTE a = ((a2-a1)*MAG)+ a1;
BYTE r = ((r2-r1)*MAG)+ r1;
BYTE g = ((g2-g1)*MAG)+ g1;
BYTE b = ((b2-b1)*MAG)+ b1;
v1->argb = ( (a<<24) | (r<<16) | (g<<8) | (b<<0) );

/* Linear interpolate the U/V data */
v1->u = ((v2->u-v1->u)*MAG)+v1->u;
v1->v = ((v2->v-v1->v)*MAG)+v1->v;

/* Linear interpolate the Vertex data */
v1->x = ((v2->x-v1->x)*MAG) + v1->x;
v1->y = ((v2->y-v1->y)*MAG) + v1->y;
v1->z = ((v2->z-v1->z)*MAG) + v1->z;
}

inline void ClipZNearTriStrip( pvr_vertex_t *in, pvr_vertex_t *out, unsigned int *n )
{
unsigned short int clip = 0, vertices_inside = 0;
unsigned int v = 0, i;

for( i=0; i<(*n-2); i++ )
{
/* Clip codes have been pre-computed and OR'd into the Vertex Flag */
( in[i+0].flags & CLIPZ ) ? clip |= FIRST : ++vertices_inside;
( in[i+1].flags & CLIPZ ) ? clip |= SECOND : ++vertices_inside;
( in[i+2].flags & CLIPZ ) ? clip |= THIRD : ++vertices_inside;

switch(vertices_inside)
{
case 0: // All Vertices are outside of clip window
break;

case 3: // All Vertices are inside of clip window
VertexCopy( &in[i+0], &out[v+0] );
VertexCopy( &in[i+1], &out[v+1] );
VertexCopy( &in[i+2], &out[v+2] );
v+=3;

break;

case 1: // 1 Vertex is inside of clip window, 2 are out
VertexCopy( &in[i+0], &out[v+0] );
VertexCopy( &in[i+1], &out[v+1] );
VertexCopy( &in[i+2], &out[v+2] );

switch(clip)
{
case FIRST_TWO_OUT:
VertexClipZNear( &out[v], &out[v+2] );
VertexClipZNear( &out[v+1], &out[v+2] );

break;

case FIRST_AND_LAST_OUT:
VertexClipZNear( &out[v], &out[v+1] );
VertexClipZNear( &out[v+2], &out[v+1] );

break;

case LAST_TWO_OUT:
VertexClipZNear( &out[v+1], &out[v] );
VertexClipZNear( &out[v+2], &out[v] );

break;
}
v+=3;

break;

case 2: // 2 Vertices are inside of clip window, 1 is out
switch(clip)
{
case FIRST:
VertexCopy( &in[i+0], &out[v+0] );
VertexCopy( &in[i+1], &out[v+1] );
VertexClipZNear( &out[v+0], &out[v+1] );
v+=2;

VertexCopy( &in[i+0], &out[v+0] );
VertexCopy( &in[i+2], &out[v+1] );
VertexClipZNear( &out[v+0], &out[v+1] );
++v;

VertexCopy( &out[v-2], &out[v+0] );
VertexCopy( &out[v-1], &out[v+1] );
VertexCopy( &in[i+2] , &out[v+2] );
v+=3;

break;

case SECOND:
VertexCopy( &in[i+0], &out[v+0] );
VertexCopy( &in[i+1], &out[v+1] );
VertexClipZNear( &out[v+1], &out[v+0] );
v+=2;

VertexCopy( &in[i+2], &out[v+0] );
++v;

VertexCopy( &out[v-2], &out[v+0] );
VertexCopy( &out[v-1], &out[v+1] );
VertexCopy( &in[i+1] , &out[v+2] );
VertexClipZNear( &out[v+2], &out[v+1] );
v+=3;

break;

case THIRD:
VertexCopy( &in[i+0], &out[v+0] );
VertexCopy( &in[i+1], &out[v+1] );
VertexCopy( &in[i+2], &out[v+1] );
VertexClipZNear( &out[v+2], &out[v+1] );
v+=3;

VertexCopy( &out[v-3], &out[v+0] );
VertexCopy( &out[v-1], &out[v+1] );
v+=2;

VertexCopy( &in[i+2], &out[v] );
VertexClipZNear( &out[v+0], &out[v-2] );
++v;

break;
}
break;
}
vertices_inside = clip = 0;
}
*n = v;
}

#endif
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