mirror of
https://github.com/mpv-player/mpv
synced 2024-12-15 03:15:52 +00:00
5e79c53b4f
their stsd atoms. Also fixed link in MS Video-1 decoder. git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4130 b3059339-0415-0410-9bf9-f77b7e298cf2
394 lines
11 KiB
C
394 lines
11 KiB
C
/*
|
|
Microsoft Video 1 Decoder
|
|
|
|
(C) 2001 Mike Melanson
|
|
|
|
The description of the algorithm you can read here:
|
|
http://www.pcisys.net/~melanson/codecs/
|
|
|
|
32bpp support (c) alex
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "bswap.h"
|
|
|
|
#define LE_16(x) (le2me_16(*(unsigned short *)(x)))
|
|
|
|
#define DECODE_BGR555_TO_BGR888(x) \
|
|
x.c1_b = (x.c1 >> 7) & 0xF8; \
|
|
x.c1_g = (x.c1 >> 2) & 0xF8; \
|
|
x.c1_r = (x.c1 << 3) & 0xF8; \
|
|
x.c2_b = (x.c2 >> 7) & 0xF8; \
|
|
x.c2_g = (x.c2 >> 2) & 0xF8; \
|
|
x.c2_r = (x.c2 << 3) & 0xF8;
|
|
|
|
#define DECODE_PALETTE_TO_BGR888(x) \
|
|
x.c1_b = palette_map[x.c1 * 4 + 2]; \
|
|
x.c1_g = palette_map[x.c1 * 4 + 1]; \
|
|
x.c1_r = palette_map[x.c1 * 4 + 0]; \
|
|
x.c2_b = palette_map[x.c2 * 4 + 2]; \
|
|
x.c2_g = palette_map[x.c2 * 4 + 1]; \
|
|
x.c2_r = palette_map[x.c2 * 4 + 0];
|
|
|
|
struct
|
|
{
|
|
unsigned short c1, c2;
|
|
unsigned char c1_r, c1_g, c1_b;
|
|
unsigned char c2_r, c2_g, c2_b;
|
|
} quad[2][2];
|
|
|
|
void AVI_Decode_Video1_16(
|
|
char *encoded,
|
|
int encoded_size,
|
|
char *decoded,
|
|
int width,
|
|
int height,
|
|
int bytes_per_pixel)
|
|
{
|
|
int block_ptr, pixel_ptr;
|
|
int total_blocks;
|
|
int pixel_x, pixel_y; // pixel width and height iterators
|
|
int block_x, block_y; // block width and height iterators
|
|
int blocks_wide, blocks_high; // width and height in 4x4 blocks
|
|
int block_inc;
|
|
int row_dec;
|
|
|
|
// decoding parameters
|
|
int stream_ptr;
|
|
unsigned char byte_a, byte_b;
|
|
unsigned short flags;
|
|
int skip_blocks;
|
|
|
|
stream_ptr = 0;
|
|
skip_blocks = 0;
|
|
blocks_wide = width / 4;
|
|
blocks_high = height / 4;
|
|
total_blocks = blocks_wide * blocks_high;
|
|
block_inc = 4 * bytes_per_pixel;
|
|
row_dec = (width + 4) * bytes_per_pixel;
|
|
|
|
for (block_y = blocks_high; block_y > 0; block_y--)
|
|
{
|
|
block_ptr = ((block_y * 4) - 1) * (width * bytes_per_pixel);
|
|
for (block_x = blocks_wide; block_x > 0; block_x--)
|
|
{
|
|
// check if this block should be skipped
|
|
if (skip_blocks)
|
|
{
|
|
block_ptr += block_inc;
|
|
skip_blocks--;
|
|
total_blocks--;
|
|
continue;
|
|
}
|
|
|
|
pixel_ptr = block_ptr;
|
|
|
|
// get the next two bytes in the encoded data stream
|
|
byte_a = encoded[stream_ptr++];
|
|
byte_b = encoded[stream_ptr++];
|
|
|
|
// check if the decode is finished
|
|
if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0))
|
|
return;
|
|
|
|
// check if this is a skip code
|
|
else if ((byte_b & 0xFC) == 0x84)
|
|
{
|
|
// but don't count the current block
|
|
skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
|
|
}
|
|
|
|
// check if this is in the 2- or 8-color classes
|
|
else if (byte_b < 0x80)
|
|
{
|
|
flags = (byte_b << 8) | byte_a;
|
|
|
|
quad[0][0].c1 = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
quad[0][0].c2 = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
|
|
DECODE_BGR555_TO_BGR888(quad[0][0]);
|
|
|
|
if (quad[0][0].c1 & 0x8000)
|
|
{
|
|
// 8-color encoding
|
|
quad[1][0].c1 = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
quad[1][0].c2 = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
quad[0][1].c1 = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
quad[0][1].c2 = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
quad[1][1].c1 = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
quad[1][1].c2 = LE_16(&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
|
|
DECODE_BGR555_TO_BGR888(quad[0][1]);
|
|
DECODE_BGR555_TO_BGR888(quad[1][0]);
|
|
DECODE_BGR555_TO_BGR888(quad[1][1]);
|
|
|
|
for (pixel_y = 0; pixel_y < 4; pixel_y++)
|
|
{
|
|
for (pixel_x = 0; pixel_x < 4; pixel_x++)
|
|
{
|
|
if (flags & 1)
|
|
{
|
|
decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c1_r;
|
|
decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c1_g;
|
|
decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c1_b;
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
else
|
|
{
|
|
decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c2_r;
|
|
decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c2_g;
|
|
decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c2_b;
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
|
|
// get the next flag ready to go
|
|
flags >>= 1;
|
|
}
|
|
pixel_ptr -= row_dec;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// 2-color encoding
|
|
for (pixel_y = 0; pixel_y < 4; pixel_y++)
|
|
{
|
|
for (pixel_x = 0; pixel_x < 4; pixel_x++)
|
|
{
|
|
if (flags & 1)
|
|
{
|
|
decoded[pixel_ptr++] = quad[0][0].c1_r;
|
|
decoded[pixel_ptr++] = quad[0][0].c1_g;
|
|
decoded[pixel_ptr++] = quad[0][0].c1_b;
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
else
|
|
{
|
|
decoded[pixel_ptr++] = quad[0][0].c2_r;
|
|
decoded[pixel_ptr++] = quad[0][0].c2_g;
|
|
decoded[pixel_ptr++] = quad[0][0].c2_b;
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
|
|
// get the next flag ready to go
|
|
flags >>= 1;
|
|
}
|
|
pixel_ptr -= row_dec;
|
|
}
|
|
}
|
|
}
|
|
|
|
// otherwise, it's a 1-color block
|
|
else
|
|
{
|
|
quad[0][0].c1 = (byte_b << 8) | byte_a;
|
|
DECODE_BGR555_TO_BGR888(quad[0][0]);
|
|
|
|
for (pixel_y = 0; pixel_y < 4; pixel_y++)
|
|
{
|
|
for (pixel_x = 0; pixel_x < 4; pixel_x++)
|
|
{
|
|
decoded[pixel_ptr++] = quad[0][0].c1_r;
|
|
decoded[pixel_ptr++] = quad[0][0].c1_g;
|
|
decoded[pixel_ptr++] = quad[0][0].c1_b;
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
pixel_ptr -= row_dec;
|
|
}
|
|
}
|
|
|
|
block_ptr += block_inc;
|
|
total_blocks--;
|
|
}
|
|
}
|
|
}
|
|
|
|
void AVI_Decode_Video1_8(
|
|
char *encoded,
|
|
int encoded_size,
|
|
char *decoded,
|
|
int width,
|
|
int height,
|
|
unsigned char *palette_map,
|
|
int bytes_per_pixel)
|
|
{
|
|
int block_ptr, pixel_ptr;
|
|
int total_blocks;
|
|
int pixel_x, pixel_y; // pixel width and height iterators
|
|
int block_x, block_y; // block width and height iterators
|
|
int blocks_wide, blocks_high; // width and height in 4x4 blocks
|
|
int block_inc;
|
|
int row_dec;
|
|
|
|
// decoding parameters
|
|
int stream_ptr;
|
|
unsigned char byte_a, byte_b;
|
|
unsigned short flags;
|
|
int skip_blocks;
|
|
|
|
stream_ptr = 0;
|
|
skip_blocks = 0;
|
|
blocks_wide = width / 4;
|
|
blocks_high = height / 4;
|
|
total_blocks = blocks_wide * blocks_high;
|
|
block_inc = 4 * bytes_per_pixel;
|
|
row_dec = (width + 4) * bytes_per_pixel;
|
|
|
|
for (block_y = blocks_high; block_y > 0; block_y--)
|
|
{
|
|
block_ptr = ((block_y * 4) - 1) * (width * bytes_per_pixel);
|
|
for (block_x = blocks_wide; block_x > 0; block_x--)
|
|
{
|
|
// check if this block should be skipped
|
|
if (skip_blocks)
|
|
{
|
|
block_ptr += block_inc;
|
|
skip_blocks--;
|
|
total_blocks--;
|
|
continue;
|
|
}
|
|
|
|
pixel_ptr = block_ptr;
|
|
|
|
// get the next two bytes in the encoded data stream
|
|
byte_a = encoded[stream_ptr++];
|
|
byte_b = encoded[stream_ptr++];
|
|
|
|
// check if the decode is finished
|
|
if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0))
|
|
return;
|
|
|
|
// check if this is a skip code
|
|
else if ((byte_b & 0xFC) == 0x84)
|
|
{
|
|
// but don't count the current block
|
|
skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
|
|
}
|
|
|
|
// check if this is a 2-color block
|
|
else if (byte_b < 0x80)
|
|
{
|
|
flags = (byte_b << 8) | byte_a;
|
|
|
|
quad[0][0].c1 = (unsigned char)encoded[stream_ptr++];
|
|
quad[0][0].c2 = (unsigned char)encoded[stream_ptr++];
|
|
|
|
DECODE_PALETTE_TO_BGR888(quad[0][0]);
|
|
|
|
// 2-color encoding
|
|
for (pixel_y = 0; pixel_y < 4; pixel_y++)
|
|
{
|
|
for (pixel_x = 0; pixel_x < 4; pixel_x++)
|
|
{
|
|
if (flags & 1)
|
|
{
|
|
decoded[pixel_ptr++] = quad[0][0].c1_r;
|
|
decoded[pixel_ptr++] = quad[0][0].c1_g;
|
|
decoded[pixel_ptr++] = quad[0][0].c1_b;
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
else
|
|
{
|
|
decoded[pixel_ptr++] = quad[0][0].c2_r;
|
|
decoded[pixel_ptr++] = quad[0][0].c2_g;
|
|
decoded[pixel_ptr++] = quad[0][0].c2_b;
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
|
|
// get the next flag ready to go
|
|
flags >>= 1;
|
|
}
|
|
pixel_ptr -= row_dec;
|
|
}
|
|
}
|
|
|
|
// check if it's an 8-color block
|
|
else if (byte_b >= 0x90)
|
|
{
|
|
flags = (byte_b << 8) | byte_a;
|
|
|
|
quad[0][0].c1 = (unsigned char)encoded[stream_ptr++];
|
|
quad[0][0].c2 = (unsigned char)encoded[stream_ptr++];
|
|
quad[1][0].c1 = (unsigned char)encoded[stream_ptr++];
|
|
quad[1][0].c2 = (unsigned char)encoded[stream_ptr++];
|
|
|
|
quad[0][1].c1 = (unsigned char)encoded[stream_ptr++];
|
|
quad[0][1].c2 = (unsigned char)encoded[stream_ptr++];
|
|
quad[1][1].c1 = (unsigned char)encoded[stream_ptr++];
|
|
quad[1][1].c2 = (unsigned char)encoded[stream_ptr++];
|
|
|
|
DECODE_PALETTE_TO_BGR888(quad[0][0]);
|
|
DECODE_PALETTE_TO_BGR888(quad[0][1]);
|
|
DECODE_PALETTE_TO_BGR888(quad[1][0]);
|
|
DECODE_PALETTE_TO_BGR888(quad[1][1]);
|
|
|
|
for (pixel_y = 0; pixel_y < 4; pixel_y++)
|
|
{
|
|
for (pixel_x = 0; pixel_x < 4; pixel_x++)
|
|
{
|
|
if (flags & 1)
|
|
{
|
|
decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c1_r;
|
|
decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c1_g;
|
|
decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c1_b;
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
else
|
|
{
|
|
decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c2_r;
|
|
decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c2_g;
|
|
decoded[pixel_ptr++] = quad[pixel_x >> 1][pixel_y >> 1].c2_b;
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
|
|
// get the next flag ready to go
|
|
flags >>= 1;
|
|
}
|
|
pixel_ptr -= row_dec;
|
|
}
|
|
}
|
|
|
|
// otherwise, it's a 1-color block
|
|
else
|
|
{
|
|
// init c2 along with c1 just so c2 is a known value for macro
|
|
quad[0][0].c1 = quad[0][0].c2 = byte_a;
|
|
DECODE_PALETTE_TO_BGR888(quad[0][0]);
|
|
|
|
for (pixel_y = 0; pixel_y < 4; pixel_y++)
|
|
{
|
|
for (pixel_x = 0; pixel_x < 4; pixel_x++)
|
|
{
|
|
decoded[pixel_ptr++] = quad[0][0].c1_r;
|
|
decoded[pixel_ptr++] = quad[0][0].c1_g;
|
|
decoded[pixel_ptr++] = quad[0][0].c1_b;
|
|
if (bytes_per_pixel == 4) /* 32bpp */
|
|
pixel_ptr++;
|
|
}
|
|
pixel_ptr -= row_dec;
|
|
}
|
|
}
|
|
|
|
block_ptr += block_inc;
|
|
total_blocks--;
|
|
}
|
|
}
|
|
}
|
|
|