mirror of
https://github.com/mpv-player/mpv
synced 2024-12-27 17:42:17 +00:00
a54006e1cf
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3738 b3059339-0415-0410-9bf9-f77b7e298cf2
307 lines
8.6 KiB
C
307 lines
8.6 KiB
C
/*
|
|
FLI Decoder for MPlayer
|
|
|
|
(C) 2001 Mike Melanson
|
|
|
|
32bpp support (c) alex
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "bswap.h"
|
|
#include <stdio.h>
|
|
|
|
#define LE_16(x) (le2me_16(*(unsigned short *)(x)))
|
|
#define LE_32(x) (le2me_32(*(unsigned int *)(x)))
|
|
|
|
#define FLI_256_COLOR 4
|
|
#define FLI_DELTA 7
|
|
#define FLI_COLOR 11
|
|
#define FLI_LC 12
|
|
#define FLI_BLACK 13
|
|
#define FLI_BRUN 15
|
|
#define FLI_COPY 16
|
|
#define FLI_MINI 18
|
|
|
|
// 256 RGB entries; 25% of these bytes will be unused, but it's faster
|
|
// to index 4-byte entries
|
|
static unsigned char palette[256 * 4];
|
|
|
|
void Decode_Fli(
|
|
unsigned char *encoded,
|
|
int encoded_size,
|
|
unsigned char *decoded,
|
|
int width,
|
|
int height,
|
|
int bytes_per_pixel)
|
|
{
|
|
int stream_ptr = 0;
|
|
int pixel_ptr;
|
|
int palette_ptr1;
|
|
int palette_ptr2;
|
|
|
|
unsigned int frame_size;
|
|
int num_chunks;
|
|
|
|
unsigned int chunk_size;
|
|
int chunk_type;
|
|
|
|
int i, j;
|
|
|
|
int color_packets;
|
|
int color_changes;
|
|
int color_scale;
|
|
|
|
int lines;
|
|
int compressed_lines;
|
|
int starting_line;
|
|
signed short line_packets;
|
|
int y_ptr;
|
|
int line_inc;
|
|
signed char byte_run;
|
|
|
|
frame_size = LE_32(&encoded[stream_ptr]);
|
|
stream_ptr += 6; // skip the magic number
|
|
num_chunks = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 10; // skip padding
|
|
|
|
// iterate through the chunks
|
|
frame_size -= 16;
|
|
while ((frame_size > 0) && (num_chunks > 0))
|
|
{
|
|
chunk_size = LE_32(&encoded[stream_ptr]);
|
|
stream_ptr += 4;
|
|
chunk_type = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
|
|
switch (chunk_type)
|
|
{
|
|
case FLI_256_COLOR:
|
|
case FLI_COLOR:
|
|
if (chunk_type == FLI_COLOR)
|
|
color_scale = 4;
|
|
else
|
|
color_scale = 1;
|
|
// set up the palette
|
|
color_packets = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
palette_ptr1 = 0;
|
|
for (i = 0; i < color_packets; i++)
|
|
{
|
|
// first byte is how many colors to skip
|
|
palette_ptr1 += (encoded[stream_ptr++] * 4);
|
|
// next byte indicates how many entries to change
|
|
color_changes = encoded[stream_ptr++];
|
|
// if there are 0 color changes, there are actually 256
|
|
if (color_changes == 0)
|
|
color_changes = 256;
|
|
for (j = 0; j < color_changes; j++)
|
|
{
|
|
palette[palette_ptr1++] = encoded[stream_ptr + 2] * color_scale;
|
|
palette[palette_ptr1++] = encoded[stream_ptr + 1] * color_scale;
|
|
palette[palette_ptr1++] = encoded[stream_ptr + 0] * color_scale;
|
|
palette_ptr1++;
|
|
stream_ptr += 3;
|
|
}
|
|
}
|
|
// it seems that a color packet has to be an even number of bytes
|
|
// so account for a pad byte
|
|
if (stream_ptr & 0x01)
|
|
stream_ptr++;
|
|
break;
|
|
|
|
case FLI_DELTA:
|
|
line_inc = width * bytes_per_pixel;
|
|
y_ptr = 0;
|
|
compressed_lines = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
while (compressed_lines > 0)
|
|
{
|
|
line_packets = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
if (line_packets < 0)
|
|
{
|
|
line_packets = -line_packets;
|
|
y_ptr += (line_packets * line_inc);
|
|
}
|
|
else
|
|
{
|
|
pixel_ptr = y_ptr;
|
|
for (i = 0; i < line_packets; i++)
|
|
{
|
|
// account for the skip bytes
|
|
pixel_ptr += encoded[stream_ptr++] * bytes_per_pixel;
|
|
byte_run = encoded[stream_ptr++];
|
|
if (byte_run < 0)
|
|
{
|
|
byte_run = -byte_run;
|
|
palette_ptr1 = encoded[stream_ptr++] * 4;
|
|
palette_ptr2 = encoded[stream_ptr++] * 4;
|
|
for (j = 0; j < byte_run; j++)
|
|
{
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 0];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 1];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 2];
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
|
|
decoded[pixel_ptr++] = palette[palette_ptr2 + 0];
|
|
decoded[pixel_ptr++] = palette[palette_ptr2 + 1];
|
|
decoded[pixel_ptr++] = palette[palette_ptr2 + 2];
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (j = 0; j < byte_run * 2; j++)
|
|
{
|
|
palette_ptr1 = encoded[stream_ptr++] * 4;
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 0];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 1];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 2];
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
}
|
|
}
|
|
y_ptr += line_inc;
|
|
compressed_lines--;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case FLI_LC:
|
|
// line compressed
|
|
line_inc = width * bytes_per_pixel;
|
|
starting_line = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
y_ptr = starting_line * line_inc;
|
|
|
|
compressed_lines = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
while (compressed_lines > 0)
|
|
{
|
|
pixel_ptr = y_ptr;
|
|
line_packets = encoded[stream_ptr++];
|
|
if (line_packets > 0)
|
|
{
|
|
for (i = 0; i < line_packets; i++)
|
|
{
|
|
// account for the skip bytes
|
|
pixel_ptr += encoded[stream_ptr++] * bytes_per_pixel;
|
|
byte_run = encoded[stream_ptr++];
|
|
if (byte_run > 0)
|
|
{
|
|
for (j = 0; j < byte_run; j++)
|
|
{
|
|
palette_ptr1 = encoded[stream_ptr++] * 4;
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 0];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 1];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 2];
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
byte_run = -byte_run;
|
|
palette_ptr1 = encoded[stream_ptr++] * 4;
|
|
for (j = 0; j < byte_run; j++)
|
|
{
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 0];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 1];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 2];
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
y_ptr += line_inc;
|
|
compressed_lines--;
|
|
}
|
|
break;
|
|
|
|
case FLI_BLACK:
|
|
// set the whole frame to color 0 (which is usually black)
|
|
for (pixel_ptr = 0; pixel_ptr < (width * height * bytes_per_pixel); pixel_ptr++)
|
|
{
|
|
decoded[pixel_ptr++] = palette[0];
|
|
decoded[pixel_ptr++] = palette[1];
|
|
decoded[pixel_ptr++] = palette[2];
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
break;
|
|
|
|
case FLI_BRUN:
|
|
// byte run compression
|
|
line_inc = width * bytes_per_pixel;
|
|
y_ptr = 0;
|
|
for (lines = 0; lines < height; lines++)
|
|
{
|
|
pixel_ptr = y_ptr;
|
|
line_packets = encoded[stream_ptr++];
|
|
for (i = 0; i < line_packets; i++)
|
|
{
|
|
byte_run = encoded[stream_ptr++];
|
|
if (byte_run > 0)
|
|
{
|
|
palette_ptr1 = encoded[stream_ptr++] * 4;
|
|
for (j = 0; j < byte_run; j++)
|
|
{
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 0];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 1];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 2];
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
}
|
|
else // copy bytes if byte_run < 0
|
|
{
|
|
byte_run = -byte_run;
|
|
for (j = 0; j < byte_run; j++)
|
|
{
|
|
palette_ptr1 = encoded[stream_ptr++] * 4;
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 0];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 1];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 2];
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
}
|
|
}
|
|
|
|
y_ptr += line_inc;
|
|
}
|
|
break;
|
|
|
|
case FLI_COPY:
|
|
// copy the chunk (uncompressed frame)
|
|
for (pixel_ptr = 0; pixel_ptr < chunk_size - 6; pixel_ptr++)
|
|
{
|
|
palette_ptr1 = encoded[stream_ptr++] * 4;
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 0];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 1];
|
|
decoded[pixel_ptr++] = palette[palette_ptr1 + 2];
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
break;
|
|
|
|
case FLI_MINI:
|
|
// sort of a thumbnail? disregard this chunk...
|
|
stream_ptr += chunk_size - 6;
|
|
break;
|
|
|
|
default:
|
|
printf ("FLI: Unrecognized chunk type: %d\n", chunk_type);
|
|
break;
|
|
}
|
|
|
|
frame_size -= chunk_size;
|
|
num_chunks--;
|
|
}
|
|
}
|