mirror of
https://github.com/mpv-player/mpv
synced 2024-11-14 22:48:35 +01:00
4d38521e2c
-ifo <ifo file> Indicate the file that will be used to load palette and frame size for MPEG subtitles. * mencoder.c: Fix cropping when decoding MPEG2. * spudec.c: If scaling is needed only do it once. Change WITH_NO_ANTIALIASING to ANTIALIASING_ALGORITHM. * vobsub.c: Support reading info regarding size and palette from IDX file instead of IFO file. Support streams containing audio or video. git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5389 b3059339-0415-0410-9bf9-f77b7e298cf2
691 lines
23 KiB
C
691 lines
23 KiB
C
/* Valid values for ANTIALIASING_ALGORITHM:
|
|
0: none (fastest, most ugly)
|
|
1: aproximate
|
|
2: full (slowest, best looking)
|
|
*/
|
|
#define ANTIALIASING_ALGORITHM 1
|
|
|
|
/* SPUdec.c
|
|
Skeleton of function spudec_process_controll() is from xine sources.
|
|
Further works:
|
|
LGB,... (yeah, try to improve it and insert your name here! ;-)
|
|
|
|
Kim Minh Kaplan
|
|
implement fragments reassembly, RLE decoding.
|
|
read brightness from the IFO.
|
|
|
|
For information on SPU format see <URL:http://sam.zoy.org/doc/dvd/subtitles/>
|
|
and <URL:http://members.aol.com/mpucoder/DVD/spu.html>
|
|
|
|
*/
|
|
#include "config.h"
|
|
#include "mp_msg.h"
|
|
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#if ANTIALIASING_ALGORITHM == 2
|
|
#include <math.h>
|
|
#endif
|
|
#include "spudec.h"
|
|
|
|
#define MIN(a, b) ((a)<(b)?(a):(b))
|
|
|
|
typedef struct {
|
|
unsigned int global_palette[16];
|
|
unsigned int orig_frame_width, orig_frame_height;
|
|
unsigned char* packet;
|
|
size_t packet_reserve; /* size of the memory pointed to by packet */
|
|
unsigned int packet_offset; /* end of the currently assembled fragment */
|
|
unsigned int packet_size; /* size of the packet once all fragments are assembled */
|
|
unsigned int control_start; /* index of start of control data */
|
|
unsigned int palette[4];
|
|
unsigned int alpha[4];
|
|
unsigned int now_pts;
|
|
unsigned int start_pts, end_pts;
|
|
unsigned int start_col, end_col;
|
|
unsigned int start_row, end_row;
|
|
unsigned int width, height, stride;
|
|
unsigned int current_nibble[2]; /* next data nibble (4 bits) to be
|
|
processed (for RLE decoding) for
|
|
even and odd lines */
|
|
int deinterlace_oddness; /* 0 or 1, index into current_nibble */
|
|
size_t image_size; /* Size of the image buffer */
|
|
unsigned char *image; /* Grayscale value */
|
|
unsigned char *aimage; /* Alpha value */
|
|
unsigned int scaled_frame_width, scaled_frame_height;
|
|
unsigned int scaled_start_col, scaled_start_row;
|
|
unsigned int scaled_width, scaled_height, scaled_stride;
|
|
size_t scaled_image_size;
|
|
unsigned char *scaled_image;
|
|
unsigned char *scaled_aimage;
|
|
} spudec_handle_t;
|
|
|
|
static inline unsigned int get_be16(const unsigned char *p)
|
|
{
|
|
return (p[0] << 8) + p[1];
|
|
}
|
|
|
|
static inline unsigned int get_be24(const unsigned char *p)
|
|
{
|
|
return (get_be16(p) << 8) + p[2];
|
|
}
|
|
|
|
static void next_line(spudec_handle_t *this)
|
|
{
|
|
if (this->current_nibble[this->deinterlace_oddness] % 2)
|
|
this->current_nibble[this->deinterlace_oddness]++;
|
|
this->deinterlace_oddness = (this->deinterlace_oddness + 1) % 2;
|
|
}
|
|
|
|
static inline unsigned char get_nibble(spudec_handle_t *this)
|
|
{
|
|
unsigned char nib;
|
|
unsigned int *nibblep = this->current_nibble + this->deinterlace_oddness;
|
|
if (*nibblep / 2 >= this->control_start) {
|
|
mp_msg(MSGT_SPUDEC,MSGL_WARN, "SPUdec: ERROR: get_nibble past end of packet\n");
|
|
return 0;
|
|
}
|
|
nib = this->packet[*nibblep / 2];
|
|
if (*nibblep % 2)
|
|
nib &= 0xf;
|
|
else
|
|
nib >>= 4;
|
|
++*nibblep;
|
|
return nib;
|
|
}
|
|
|
|
static inline int mkalpha(int i)
|
|
{
|
|
/* In mplayer's alpha planes, 0 is transparent, then 1 is nearly
|
|
opaque upto 255 which is transparent */
|
|
switch (i) {
|
|
case 0xf:
|
|
return 1;
|
|
case 0:
|
|
return 0;
|
|
default:
|
|
return (0xf - i) << 4;
|
|
}
|
|
}
|
|
|
|
static void spudec_process_data(spudec_handle_t *this)
|
|
{
|
|
unsigned int cmap[4], alpha[4];
|
|
unsigned int i, x, y;
|
|
|
|
this->scaled_frame_width = 0;
|
|
this->scaled_frame_height = 0;
|
|
for (i = 0; i < 4; ++i) {
|
|
alpha[i] = mkalpha(this->alpha[i]);
|
|
if (alpha[i] == 0)
|
|
cmap[i] = 0;
|
|
else {
|
|
cmap[i] = ((this->global_palette[this->palette[i]] >> 16) & 0xff);
|
|
if (cmap[i] + alpha[i] > 255)
|
|
cmap[i] = 256 - alpha[i];
|
|
}
|
|
}
|
|
|
|
if (this->image_size < this->stride * this->height) {
|
|
if (this->image != NULL) {
|
|
free(this->image);
|
|
this->image_size = 0;
|
|
}
|
|
this->image = malloc(2 * this->stride * this->height);
|
|
if (this->image) {
|
|
this->image_size = this->stride * this->height;
|
|
this->aimage = this->image + this->image_size;
|
|
}
|
|
}
|
|
if (this->image == NULL)
|
|
return;
|
|
|
|
/* Kludge: draw_alpha needs width multiple of 8. */
|
|
if (this->width < this->stride)
|
|
for (y = 0; y < this->height; ++y)
|
|
memset(this->aimage + y * this->stride + this->width, 0, this->stride - this->width);
|
|
|
|
i = this->current_nibble[1];
|
|
x = 0;
|
|
y = 0;
|
|
while (this->current_nibble[0] < i
|
|
&& this->current_nibble[1] / 2 < this->control_start
|
|
&& y < this->height) {
|
|
unsigned int len, color;
|
|
unsigned int rle = 0;
|
|
rle = get_nibble(this);
|
|
if (rle < 0x04) {
|
|
rle = (rle << 4) | get_nibble(this);
|
|
if (rle < 0x10) {
|
|
rle = (rle << 4) | get_nibble(this);
|
|
if (rle < 0x040) {
|
|
rle = (rle << 4) | get_nibble(this);
|
|
if (rle < 0x0004)
|
|
rle |= ((this->width - x) << 2);
|
|
}
|
|
}
|
|
}
|
|
color = 3 - (rle & 0x3);
|
|
len = rle >> 2;
|
|
if (len > this->width - x || len == 0)
|
|
len = this->width - x;
|
|
/* FIXME have to use palette and alpha map*/
|
|
memset(this->image + y * this->stride + x, cmap[color], len);
|
|
memset(this->aimage + y * this->stride + x, alpha[color], len);
|
|
x += len;
|
|
if (x >= this->width) {
|
|
next_line(this);
|
|
x = 0;
|
|
++y;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void spudec_process_control(spudec_handle_t *this, unsigned int pts100)
|
|
{
|
|
int a,b; /* Temporary vars */
|
|
unsigned int date, type;
|
|
unsigned int off;
|
|
unsigned int start_off = 0;
|
|
unsigned int next_off;
|
|
|
|
this->control_start = get_be16(this->packet + 2);
|
|
next_off = this->control_start;
|
|
while (start_off != next_off) {
|
|
start_off = next_off;
|
|
date = get_be16(this->packet + start_off);
|
|
next_off = get_be16(this->packet + start_off + 2);
|
|
mp_msg(MSGT_SPUDEC,MSGL_DBG2, "date=%d\n", date);
|
|
off = start_off + 4;
|
|
for (type = this->packet[off++]; type != 0xff; type = this->packet[off++]) {
|
|
mp_msg(MSGT_SPUDEC,MSGL_DBG2, "cmd=%d ",type);
|
|
switch(type) {
|
|
case 0x00:
|
|
/* Menu ID, 1 byte */
|
|
mp_msg(MSGT_SPUDEC,MSGL_DBG2,"Menu ID\n");
|
|
break;
|
|
case 0x01:
|
|
/* Start display */
|
|
mp_msg(MSGT_SPUDEC,MSGL_DBG2,"Start display!\n");
|
|
this->start_pts = pts100 + date;
|
|
this->end_pts = UINT_MAX;
|
|
break;
|
|
case 0x02:
|
|
/* Stop display */
|
|
mp_msg(MSGT_SPUDEC,MSGL_DBG2,"Stop display!\n");
|
|
this->end_pts = pts100 + date;
|
|
break;
|
|
case 0x03:
|
|
/* Palette */
|
|
this->palette[0] = this->packet[off] >> 4;
|
|
this->palette[1] = this->packet[off] & 0xf;
|
|
this->palette[2] = this->packet[off + 1] >> 4;
|
|
this->palette[3] = this->packet[off + 1] & 0xf;
|
|
mp_msg(MSGT_SPUDEC,MSGL_DBG2,"Palette %d, %d, %d, %d\n",
|
|
this->palette[0], this->palette[1], this->palette[2], this->palette[3]);
|
|
off+=2;
|
|
break;
|
|
case 0x04:
|
|
/* Alpha */
|
|
this->alpha[0] = this->packet[off] >> 4;
|
|
this->alpha[1] = this->packet[off] & 0xf;
|
|
this->alpha[2] = this->packet[off + 1] >> 4;
|
|
this->alpha[3] = this->packet[off + 1] & 0xf;
|
|
mp_msg(MSGT_SPUDEC,MSGL_DBG2,"Alpha %d, %d, %d, %d\n",
|
|
this->alpha[0], this->alpha[1], this->alpha[2], this->alpha[3]);
|
|
off+=2;
|
|
break;
|
|
case 0x05:
|
|
/* Co-ords */
|
|
a = get_be24(this->packet + off);
|
|
b = get_be24(this->packet + off + 3);
|
|
this->start_col = a >> 12;
|
|
this->end_col = a & 0xfff;
|
|
this->width = (this->end_col < this->start_col) ? 0 : this->end_col - this->start_col + 1;
|
|
this->stride = (this->width + 7) & ~7; /* Kludge: draw_alpha needs width multiple of 8 */
|
|
this->start_row = b >> 12;
|
|
this->end_row = b & 0xfff;
|
|
this->height = (this->end_row < this->start_row) ? 0 : this->end_row - this->start_row /* + 1 */;
|
|
mp_msg(MSGT_SPUDEC,MSGL_DBG2,"Coords col: %d - %d row: %d - %d (%dx%d)\n",
|
|
this->start_col, this->end_col, this->start_row, this->end_row,
|
|
this->width, this->height);
|
|
off+=6;
|
|
break;
|
|
case 0x06:
|
|
/* Graphic lines */
|
|
this->current_nibble[0] = 2 * get_be16(this->packet + off);
|
|
this->current_nibble[1] = 2 * get_be16(this->packet + off + 2);
|
|
mp_msg(MSGT_SPUDEC,MSGL_DBG2,"Graphic offset 1: %d offset 2: %d\n",
|
|
this->current_nibble[0] / 2, this->current_nibble[1] / 2);
|
|
off+=4;
|
|
break;
|
|
case 0xff:
|
|
/* All done, bye-bye */
|
|
mp_msg(MSGT_SPUDEC,MSGL_DBG2,"Done!\n");
|
|
return;
|
|
// break;
|
|
default:
|
|
mp_msg(MSGT_SPUDEC,MSGL_WARN,"spudec: Error determining control type 0x%02x. Skipping %d bytes.\n",
|
|
type, next_off - off);
|
|
goto next_control;
|
|
}
|
|
}
|
|
next_control:
|
|
;
|
|
}
|
|
}
|
|
|
|
static void spudec_decode(spudec_handle_t *this, unsigned int pts100)
|
|
{
|
|
spudec_process_control(this, pts100);
|
|
spudec_process_data(this);
|
|
}
|
|
|
|
|
|
void spudec_assemble(void *this, unsigned char *packet, unsigned int len, unsigned int pts100)
|
|
{
|
|
spudec_handle_t *spu = (spudec_handle_t*)this;
|
|
// spudec_heartbeat(this, pts100);
|
|
if (len < 2) {
|
|
mp_msg(MSGT_SPUDEC,MSGL_WARN,"SPUasm: packet too short\n");
|
|
return;
|
|
}
|
|
if (spu->packet_offset == 0) {
|
|
unsigned int len2 = get_be16(packet);
|
|
// Start new fragment
|
|
if (spu->packet_reserve < len2) {
|
|
if (spu->packet != NULL)
|
|
free(spu->packet);
|
|
spu->packet = malloc(len2);
|
|
spu->packet_reserve = spu->packet != NULL ? len2 : 0;
|
|
}
|
|
if (spu->packet != NULL) {
|
|
spu->deinterlace_oddness = 0;
|
|
spu->packet_size = len2;
|
|
if (len > len2) {
|
|
mp_msg(MSGT_SPUDEC,MSGL_WARN,"SPUasm: invalid frag len / len2: %d / %d \n", len, len2);
|
|
return;
|
|
}
|
|
memcpy(spu->packet, packet, len);
|
|
spu->packet_offset = len;
|
|
}
|
|
} else {
|
|
// Continue current fragment
|
|
if (spu->packet_size < spu->packet_offset + len){
|
|
mp_msg(MSGT_SPUDEC,MSGL_WARN,"SPUasm: invalid fragment\n");
|
|
spu->packet_size = spu->packet_offset = 0;
|
|
} else {
|
|
memcpy(spu->packet + spu->packet_offset, packet, len);
|
|
spu->packet_offset += len;
|
|
}
|
|
}
|
|
#if 1
|
|
// check if we have a complete packet (unfortunatelly packet_size is bad
|
|
// for some disks)
|
|
// if (spu->packet_offset == spu->packet_size)
|
|
{ unsigned int x=0,y;
|
|
while(x+4<=spu->packet_offset){
|
|
y=get_be16(spu->packet+x+2); // next control pointer
|
|
mp_msg(MSGT_SPUDEC,MSGL_DBG2,"SPUtest: x=%d y=%d off=%d size=%d\n",x,y,spu->packet_offset,spu->packet_size);
|
|
if(x>=4 && x==y){ // if it points to self - we're done!
|
|
// we got it!
|
|
mp_msg(MSGT_SPUDEC,MSGL_DBG2,"SPUgot: off=%d size=%d \n",spu->packet_offset,spu->packet_size);
|
|
spudec_decode(spu, pts100);
|
|
spu->packet_offset = 0;
|
|
break;
|
|
}
|
|
if(y<=x || y>=spu->packet_size){ // invalid?
|
|
mp_msg(MSGT_SPUDEC,MSGL_WARN,"SPUtest: broken packet!!!!! y=%d < x=%d\n",y,x);
|
|
spu->packet_size = spu->packet_offset = 0;
|
|
break;
|
|
}
|
|
x=y;
|
|
}
|
|
}
|
|
#else
|
|
if (spu->packet_offset == spu->packet_size) {
|
|
spudec_decode(spu, pts100);
|
|
spu->packet_offset = 0;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void spudec_reset(void *this) // called after seek
|
|
{
|
|
spudec_handle_t *spu = (spudec_handle_t*)this;
|
|
spu->now_pts = 0;
|
|
spu->packet_size = spu->packet_offset = 0;
|
|
}
|
|
|
|
void spudec_heartbeat(void *this, unsigned int pts100)
|
|
{
|
|
((spudec_handle_t *)this)->now_pts = pts100;
|
|
}
|
|
|
|
void spudec_draw(void *this, void (*draw_alpha)(int x0,int y0, int w,int h, unsigned char* src, unsigned char *srca, int stride))
|
|
{
|
|
spudec_handle_t *spu = (spudec_handle_t *)this;
|
|
if (spu->start_pts <= spu->now_pts && spu->now_pts < spu->end_pts && spu->image)
|
|
draw_alpha(spu->start_col, spu->start_row, spu->width, spu->height,
|
|
spu->image, spu->aimage, spu->stride);
|
|
}
|
|
|
|
/* transform mplayer's alpha value into an opacity value that is linear */
|
|
static inline int canon_alpha(int alpha)
|
|
{
|
|
return alpha ? 256 - alpha : 0;
|
|
}
|
|
|
|
void spudec_draw_scaled(void *me, unsigned int dxs, unsigned int dys, void (*draw_alpha)(int x0,int y0, int w,int h, unsigned char* src, unsigned char *srca, int stride))
|
|
{
|
|
spudec_handle_t *spu = (spudec_handle_t *)me;
|
|
if (spu->start_pts <= spu->now_pts && spu->now_pts < spu->end_pts) {
|
|
if (spu->orig_frame_width == 0 || spu->orig_frame_height == 0
|
|
|| (spu->orig_frame_width == dxs && spu->orig_frame_height == dys)) {
|
|
if (spu->image)
|
|
draw_alpha(spu->start_col, spu->start_row, spu->width, spu->height,
|
|
spu->image, spu->aimage, spu->stride);
|
|
}
|
|
else {
|
|
if (spu->scaled_frame_width != dxs || spu->scaled_frame_height != dys) { /* Resizing is needed */
|
|
/* scaled_x = scalex * x / 0x100
|
|
scaled_y = scaley * y / 0x100
|
|
order of operations is important because of rounding. */
|
|
unsigned int scalex = 0x100 * dxs / spu->orig_frame_width;
|
|
unsigned int scaley = 0x100 * dys / spu->orig_frame_height;
|
|
spu->scaled_start_col = spu->start_col * scalex / 0x100;
|
|
spu->scaled_start_row = spu->start_row * scaley / 0x100;
|
|
spu->scaled_width = spu->width * scalex / 0x100;
|
|
spu->scaled_height = spu->height * scaley / 0x100;
|
|
/* Kludge: draw_alpha needs width multiple of 8 */
|
|
spu->scaled_stride = (spu->scaled_width + 7) & ~7;
|
|
if (spu->scaled_image_size < spu->scaled_stride * spu->scaled_height) {
|
|
if (spu->scaled_image) {
|
|
free(spu->scaled_image);
|
|
spu->scaled_image_size = 0;
|
|
}
|
|
spu->scaled_image = malloc(2 * spu->scaled_stride * spu->scaled_height);
|
|
if (spu->scaled_image) {
|
|
spu->scaled_image_size = spu->scaled_stride * spu->scaled_height;
|
|
spu->scaled_aimage = spu->scaled_image + spu->scaled_image_size;
|
|
}
|
|
}
|
|
if (spu->scaled_image) {
|
|
unsigned int x, y;
|
|
/* Kludge: draw_alpha needs width multiple of 8. */
|
|
if (spu->scaled_width < spu->scaled_stride)
|
|
for (y = 0; y < spu->scaled_height; ++y) {
|
|
memset(spu->scaled_aimage + y * spu->scaled_stride + spu->scaled_width, 0,
|
|
spu->scaled_stride - spu->scaled_width);
|
|
/* FIXME: Why is this one needed? */
|
|
memset(spu->scaled_image + y * spu->scaled_stride + spu->scaled_width, 0,
|
|
spu->scaled_stride - spu->scaled_width);
|
|
}
|
|
#if ANTIALIASING_ALGORITHM == 0
|
|
/* no antialiasing */
|
|
for (y = 0; y < spu->scaled_height; ++y) {
|
|
int unscaled_y = y * 0x100 / scaley;
|
|
int strides = spu->stride * unscaled_y;
|
|
int scaled_strides = spu->scaled_stride * y;
|
|
for (x = 0; x < spu->scaled_width; ++x) {
|
|
int unscaled_x = x * 0x100 / scalex;
|
|
spu->scaled_image[scaled_strides + x] = spu->image[strides + unscaled_x];
|
|
spu->scaled_aimage[scaled_strides + x] = spu->aimage[strides + unscaled_x];
|
|
}
|
|
}
|
|
#elif ANTIALIASING_ALGORITHM == 1
|
|
{
|
|
/* Intermediate antialiasing. */
|
|
for (y = 0; y < spu->scaled_height; ++y) {
|
|
const unsigned int unscaled_top = y * spu->orig_frame_height / dys;
|
|
unsigned int unscaled_bottom = (y + 1) * spu->orig_frame_height / dys;
|
|
if (unscaled_bottom >= spu->height)
|
|
unscaled_bottom = spu->height - 1;
|
|
for (x = 0; x < spu->scaled_width; ++x) {
|
|
const unsigned int unscaled_left = x * spu->orig_frame_width / dxs;
|
|
unsigned int unscaled_right = (x + 1) * spu->orig_frame_width / dxs;
|
|
unsigned int color = 0;
|
|
unsigned int alpha = 0;
|
|
unsigned int walkx, walky;
|
|
unsigned int base, tmp;
|
|
if (unscaled_right >= spu->width)
|
|
unscaled_right = spu->width - 1;
|
|
for (walky = unscaled_top; walky <= unscaled_bottom; ++walky)
|
|
for (walkx = unscaled_left; walkx <= unscaled_right; ++walkx) {
|
|
base = walky * spu->stride + walkx;
|
|
tmp = canon_alpha(spu->aimage[base]);
|
|
alpha += tmp;
|
|
color += tmp * spu->image[base];
|
|
}
|
|
base = y * spu->scaled_stride + x;
|
|
spu->scaled_image[base] = alpha ? color / alpha : 0;
|
|
spu->scaled_aimage[base] =
|
|
alpha * (1 + unscaled_bottom - unscaled_top) * (1 + unscaled_right - unscaled_left);
|
|
/* spu->scaled_aimage[base] =
|
|
alpha * dxs * dys / spu->orig_frame_width / spu->orig_frame_height; */
|
|
if (spu->scaled_aimage[base]) {
|
|
spu->scaled_aimage[base] = 256 - spu->scaled_aimage[base];
|
|
if (spu->scaled_aimage[base] + spu->scaled_image[base] > 255)
|
|
spu->scaled_image[base] = 256 - spu->scaled_aimage[base];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#else
|
|
{
|
|
/* Best antialiasing. Very slow. */
|
|
/* Any pixel (x, y) represents pixels from the original
|
|
rectangular region comprised between the columns
|
|
unscaled_y and unscaled_y + 0x100 / scaley and the rows
|
|
unscaled_x and unscaled_x + 0x100 / scalex
|
|
|
|
The original rectangular region that the scaled pixel
|
|
represents is cut in 9 rectangular areas like this:
|
|
|
|
+---+-----------------+---+
|
|
| 1 | 2 | 3 |
|
|
+---+-----------------+---+
|
|
| | | |
|
|
| 4 | 5 | 6 |
|
|
| | | |
|
|
+---+-----------------+---+
|
|
| 7 | 8 | 9 |
|
|
+---+-----------------+---+
|
|
|
|
The width of the left column is at most one pixel and
|
|
it is never null and its right column is at a pixel
|
|
boundary. The height of the top row is at most one
|
|
pixel it is never null and its bottom row is at a
|
|
pixel boundary. The width and height of region 5 are
|
|
integral values. The width of the right column is
|
|
what remains and is less than one pixel. The height
|
|
of the bottom row is what remains and is less than
|
|
one pixel.
|
|
|
|
The row above 1, 2, 3 is unscaled_y. The row between
|
|
1, 2, 3 and 4, 5, 6 is top_low_row. The row between 4,
|
|
5, 6 and 7, 8, 9 is (unsigned int)unscaled_y_bottom.
|
|
The row beneath 7, 8, 9 is unscaled_y_bottom.
|
|
|
|
The column left of 1, 4, 7 is unscaled_x. The column
|
|
between 1, 4, 7 and 2, 5, 8 is left_right_column. The
|
|
column between 2, 5, 8 and 3, 6, 9 is (unsigned
|
|
int)unscaled_x_right. The column right of 3, 6, 9 is
|
|
unscaled_x_right. */
|
|
const double inv_scalex = (double) 0x100 / scalex;
|
|
const double inv_scaley = (double) 0x100 / scaley;
|
|
for (y = 0; y < spu->scaled_height; ++y) {
|
|
const double unscaled_y = y * inv_scaley;
|
|
const double unscaled_y_bottom = unscaled_y + inv_scaley;
|
|
const unsigned int top_low_row = MIN(unscaled_y_bottom, unscaled_y + 1.0);
|
|
const double top = top_low_row - unscaled_y;
|
|
const unsigned int height = unscaled_y_bottom > top_low_row
|
|
? (unsigned int) unscaled_y_bottom - top_low_row
|
|
: 0;
|
|
const double bottom = unscaled_y_bottom > top_low_row
|
|
? unscaled_y_bottom - floor(unscaled_y_bottom)
|
|
: 0.0;
|
|
for (x = 0; x < spu->scaled_width; ++x) {
|
|
const double unscaled_x = x * inv_scalex;
|
|
const double unscaled_x_right = unscaled_x + inv_scalex;
|
|
const unsigned int left_right_column = MIN(unscaled_x_right, unscaled_x + 1.0);
|
|
const double left = left_right_column - unscaled_x;
|
|
const unsigned int width = unscaled_x_right > left_right_column
|
|
? (unsigned int) unscaled_x_right - left_right_column
|
|
: 0;
|
|
const double right = unscaled_x_right > left_right_column
|
|
? unscaled_x_right - floor(unscaled_x_right)
|
|
: 0.0;
|
|
double color = 0.0;
|
|
double alpha = 0.0;
|
|
double tmp;
|
|
unsigned int base;
|
|
/* Now use these informations to compute a good alpha,
|
|
and lightness. The sum is on each of the 9
|
|
region's surface and alpha and lightness.
|
|
|
|
transformed alpha = sum(surface * alpha) / sum(surface)
|
|
transformed color = sum(surface * alpha * color) / sum(surface * alpha)
|
|
*/
|
|
/* 1: top left part */
|
|
base = spu->stride * (unsigned int) unscaled_y;
|
|
tmp = left * top * canon_alpha(spu->aimage[base + (unsigned int) unscaled_x]);
|
|
alpha += tmp;
|
|
color += tmp * spu->image[base + (unsigned int) unscaled_x];
|
|
/* 2: top center part */
|
|
if (width > 0) {
|
|
unsigned int walkx;
|
|
for (walkx = left_right_column; walkx < (unsigned int) unscaled_x_right; ++walkx) {
|
|
base = spu->stride * (unsigned int) unscaled_y + walkx;
|
|
tmp = /* 1.0 * */ top * canon_alpha(spu->aimage[base]);
|
|
alpha += tmp;
|
|
color += tmp * spu->image[base];
|
|
}
|
|
}
|
|
/* 3: top right part */
|
|
if (right > 0.0) {
|
|
base = spu->stride * (unsigned int) unscaled_y + (unsigned int) unscaled_x_right;
|
|
tmp = right * top * canon_alpha(spu->aimage[base]);
|
|
alpha += tmp;
|
|
color += tmp * spu->image[base];
|
|
}
|
|
/* 4: center left part */
|
|
if (height > 0) {
|
|
unsigned int walky;
|
|
for (walky = top_low_row; walky < (unsigned int) unscaled_y_bottom; ++walky) {
|
|
base = spu->stride * walky + (unsigned int) unscaled_x;
|
|
tmp = left /* * 1.0 */ * canon_alpha(spu->aimage[base]);
|
|
alpha += tmp;
|
|
color += tmp * spu->image[base];
|
|
}
|
|
}
|
|
/* 5: center part */
|
|
if (width > 0 && height > 0) {
|
|
unsigned int walky;
|
|
for (walky = top_low_row; walky < (unsigned int) unscaled_y_bottom; ++walky) {
|
|
unsigned int walkx;
|
|
base = spu->stride * walky;
|
|
for (walkx = left_right_column; walkx < (unsigned int) unscaled_x_right; ++walkx) {
|
|
tmp = /* 1.0 * 1.0 * */ canon_alpha(spu->aimage[base + walkx]);
|
|
alpha += tmp;
|
|
color += tmp * spu->image[base + walkx];
|
|
}
|
|
}
|
|
}
|
|
/* 6: center right part */
|
|
if (right > 0.0 && height > 0) {
|
|
unsigned int walky;
|
|
for (walky = top_low_row; walky < (unsigned int) unscaled_y_bottom; ++walky) {
|
|
base = spu->stride * walky + (unsigned int) unscaled_x_right;
|
|
tmp = right /* * 1.0 */ * canon_alpha(spu->aimage[base]);
|
|
alpha += tmp;
|
|
color += tmp * spu->image[base];
|
|
}
|
|
}
|
|
/* 7: bottom left part */
|
|
if (bottom > 0.0) {
|
|
base = spu->stride * (unsigned int) unscaled_y_bottom + (unsigned int) unscaled_x;
|
|
tmp = left * bottom * canon_alpha(spu->aimage[base]);
|
|
alpha += tmp;
|
|
color += tmp * spu->image[base];
|
|
}
|
|
/* 8: bottom center part */
|
|
if (width > 0 && bottom > 0.0) {
|
|
unsigned int walkx;
|
|
base = spu->stride * (unsigned int) unscaled_y_bottom;
|
|
for (walkx = left_right_column; walkx < (unsigned int) unscaled_x_right; ++walkx) {
|
|
tmp = /* 1.0 * */ bottom * canon_alpha(spu->aimage[base + walkx]);
|
|
alpha += tmp;
|
|
color += tmp * spu->image[base + walkx];
|
|
}
|
|
}
|
|
/* 9: bottom right part */
|
|
if (right > 0.0 && bottom > 0.0) {
|
|
base = spu->stride * (unsigned int) unscaled_y_bottom + (unsigned int) unscaled_x_right;
|
|
tmp = right * bottom * canon_alpha(spu->aimage[base]);
|
|
alpha += tmp;
|
|
color += tmp * spu->image[base];
|
|
}
|
|
/* Finally mix these transparency and brightness information suitably */
|
|
base = spu->scaled_stride * y + x;
|
|
spu->scaled_image[base] = alpha > 0 ? color / alpha : 0;
|
|
spu->scaled_aimage[base] = alpha * scalex * scaley / 0x10000;
|
|
if (spu->scaled_aimage[base]) {
|
|
spu->scaled_aimage[base] = 256 - spu->scaled_aimage[base];
|
|
if (spu->scaled_aimage[base] + spu->scaled_image[base] > 255)
|
|
spu->scaled_image[base] = 256 - spu->scaled_aimage[base];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
spu->scaled_frame_width = dxs;
|
|
spu->scaled_frame_height = dys;
|
|
}
|
|
}
|
|
if (spu->scaled_image)
|
|
draw_alpha(spu->scaled_start_col, spu->scaled_start_row, spu->scaled_width, spu->scaled_height,
|
|
spu->scaled_image, spu->scaled_aimage, spu->scaled_stride);
|
|
}
|
|
}
|
|
}
|
|
|
|
void *spudec_new_scaled(unsigned int *palette, unsigned int frame_width, unsigned int frame_height)
|
|
{
|
|
spudec_handle_t *this = calloc(1, sizeof(spudec_handle_t));
|
|
if (this) {
|
|
if (palette)
|
|
memcpy(this->global_palette, palette, sizeof(this->global_palette));
|
|
this->packet = NULL;
|
|
this->image = NULL;
|
|
this->scaled_image = NULL;
|
|
this->orig_frame_width = frame_width;
|
|
this->orig_frame_height = frame_height;
|
|
}
|
|
else
|
|
perror("FATAL: spudec_init: calloc");
|
|
return this;
|
|
}
|
|
|
|
void *spudec_new(unsigned int *palette)
|
|
{
|
|
return spudec_new_scaled(palette, 0, 0);
|
|
}
|
|
|
|
void spudec_free(void *this)
|
|
{
|
|
spudec_handle_t *spu = (spudec_handle_t*)this;
|
|
if (spu) {
|
|
if (spu->packet)
|
|
free(spu->packet);
|
|
if (spu->scaled_image)
|
|
free(spu->scaled_image);
|
|
if (spu->image)
|
|
free(spu->image);
|
|
free(spu);
|
|
}
|
|
}
|