mirror of
https://github.com/mpv-player/mpv
synced 2024-12-27 17:42:17 +00:00
ba1e011685
looked like values wrapped around the byte (not sure of the side effects but subtitles look good now) git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3039 b3059339-0415-0410-9bf9-f77b7e298cf2
338 lines
9.0 KiB
C
338 lines
9.0 KiB
C
/* 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.
|
|
image rendering needs to be corrected (see mkcolor & mkalpha).
|
|
|
|
For information on SPU format see <URL:http://sam.zoy.org/doc/dvd/subtitles/>
|
|
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include "spudec.h"
|
|
|
|
typedef struct {
|
|
unsigned char* packet;
|
|
size_t packet_reserve; /* size of the memory pointed to by packet */
|
|
int packet_offset; /* end of the currently assembled fragment */
|
|
int packet_size; /* size of the packet once all fragments are assembled */
|
|
int control_start; /* index of start of control data */
|
|
int palette[4];
|
|
int alpha[4];
|
|
int now_pts;
|
|
int start_pts, end_pts;
|
|
int start_col, end_col;
|
|
int start_row, end_row;
|
|
int width, height;
|
|
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 */
|
|
} 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;
|
|
int *nibblep = this->current_nibble + this->deinterlace_oddness;
|
|
if (*nibblep / 2 >= this->control_start) {
|
|
fprintf(stderr, "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)
|
|
{
|
|
/* for VO 0 is transparent
|
|
127 is quite dark, but still...
|
|
255 is transparent with color 0, and hum... funny with other colors...
|
|
|
|
FIXME, I can't seem to get a good alpha value!
|
|
|
|
i is the value read from SPU, from 0 to 15. The function should
|
|
return the corresponding alpha value suitable for libvo's
|
|
draw_alpha. */
|
|
#if 0
|
|
return (0xf - (i & 0xf)) << 4;
|
|
#else
|
|
return (i < 8) ? 127 : 0;
|
|
#endif
|
|
}
|
|
|
|
static inline int mkcolor(int i)
|
|
{
|
|
/* FIXME, have to get the colormap's RGB values from the IFO */
|
|
#if 0
|
|
switch (i) {
|
|
case 15: return 0;
|
|
default: return i << 4;
|
|
}
|
|
#else
|
|
return i << 4;
|
|
#endif
|
|
}
|
|
|
|
static void spudec_process_data(spudec_handle_t *this)
|
|
{
|
|
int alpha[4] = {
|
|
mkalpha(this->alpha[0]),
|
|
mkalpha(this->alpha[1]),
|
|
mkalpha(this->alpha[2]),
|
|
mkalpha(this->alpha[3])
|
|
};
|
|
int cmap[4] = {
|
|
mkcolor(this->palette[0]),
|
|
mkcolor(this->palette[1]),
|
|
mkcolor(this->palette[2]),
|
|
mkcolor(this->palette[3])
|
|
};
|
|
int y = 0, x = 0;
|
|
|
|
if (this->image_size < this->width * this->height) {
|
|
if (this->image != NULL)
|
|
free(this->image);
|
|
this->image = malloc(2 * this->width * this->height);
|
|
if (this->image) {
|
|
this->image_size = this->width * this->height;
|
|
this->aimage = this->image + this->image_size;
|
|
}
|
|
}
|
|
if (this->image == NULL)
|
|
return;
|
|
while (this->current_nibble[0] / 2 < this->control_start
|
|
&& this->current_nibble[1] / 2 < this->control_start
|
|
&& y < this->height) {
|
|
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 = rle & 0x3;
|
|
len = rle >> 2;
|
|
if (len > this->width - x)
|
|
len = this->width - x;
|
|
/* FIXME have to use palette and alpha map*/
|
|
memset(this->image + y * this->width + x, cmap[color], len);
|
|
if (alpha[color] < cmap[color]) {
|
|
memset(this->aimage + y * this->width + x, 1, len);
|
|
} else {
|
|
memset(this->aimage + y * this->width + x, alpha[color] - cmap[color], len);
|
|
}
|
|
x += len;
|
|
if (x >= this->width) {
|
|
next_line(this);
|
|
x = 0;
|
|
++y;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void spudec_process_control(spudec_handle_t *this)
|
|
{
|
|
int a,b; /* Temporary vars */
|
|
int date, type;
|
|
int off;
|
|
int start_off = 0;
|
|
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);
|
|
printf("date=%d\n", date);
|
|
off = start_off + 4;
|
|
for (type = this->packet[off++]; type != 0xff; type = this->packet[off++]) {
|
|
printf("cmd=%d ",type);
|
|
switch(type) {
|
|
case 0x00:
|
|
/* Menu ID, 1 byte */
|
|
printf("Menu ID\n");
|
|
break;
|
|
case 0x01:
|
|
/* Start display */
|
|
printf("Start display!\n");
|
|
this->start_pts = this->now_pts + date;
|
|
break;
|
|
case 0x02:
|
|
/* Stop display */
|
|
printf("Stop display!\n");
|
|
this->end_pts = this->now_pts + 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;
|
|
printf("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;
|
|
printf("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 + 1;
|
|
this->start_row = b >> 12;
|
|
this->end_row = b & 0xfff;
|
|
this->height = this->end_row - this->start_row + 1;
|
|
printf("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);
|
|
printf("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 */
|
|
printf("Done!\n");
|
|
return;
|
|
break;
|
|
default:
|
|
printf("spudec: Error determining control type 0x%02x.\n",type);
|
|
return;
|
|
break;
|
|
}
|
|
|
|
/* printf("spudec: Processsed control type 0x%02x.\n",type); */
|
|
}
|
|
}
|
|
}
|
|
|
|
static void spudec_decode(spudec_handle_t *this)
|
|
{
|
|
spudec_process_control(this);
|
|
spudec_process_data(this);
|
|
}
|
|
|
|
|
|
void spudec_assemble(void *this, unsigned char *packet, int len, int pts100)
|
|
{
|
|
spudec_handle_t *spu = (spudec_handle_t*)this;
|
|
spudec_heartbeat(this, pts100);
|
|
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;
|
|
memcpy(spu->packet, packet, len);
|
|
spu->packet_offset = len;
|
|
}
|
|
} else {
|
|
// Continue current fragment
|
|
if (spu->packet_size < spu->packet_offset + len)
|
|
fprintf(stderr,"invalid fragment\n");
|
|
else {
|
|
memcpy(spu->packet + spu->packet_offset, packet, len);
|
|
spu->packet_offset += len;
|
|
}
|
|
}
|
|
if (spu->packet_offset == spu->packet_size) {
|
|
spudec_decode(spu);
|
|
spu->packet_offset = 0;
|
|
}
|
|
}
|
|
|
|
void spudec_heartbeat(void *this, 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->width);
|
|
}
|
|
|
|
void *spudec_new()
|
|
{
|
|
spudec_handle_t *this = calloc(1, sizeof(spudec_handle_t));
|
|
if (this) {
|
|
;
|
|
}
|
|
else
|
|
perror("FATAL: spudec_init: calloc");
|
|
return this;
|
|
}
|
|
|
|
void spudec_free(void *this)
|
|
{
|
|
spudec_handle_t *spu = (spudec_handle_t*)this;
|
|
if (spu) {
|
|
if (spu->packet)
|
|
free(spu->packet);
|
|
if (spu->image)
|
|
free(spu->image);
|
|
free(spu);
|
|
}
|
|
}
|