mirror of
https://github.com/mpv-player/mpv
synced 2024-12-25 00:02:13 +00:00
6dd4fcd209
prowess; also added link to algorithm description in Roberto's RPZA decoder git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4648 b3059339-0415-0410-9bf9-f77b7e298cf2
265 lines
6.9 KiB
C
265 lines
6.9 KiB
C
/*
|
|
*
|
|
* Apple Video (rpza) QuickTime Decoder for Mplayer
|
|
* (c) 2002 Roberto Togni
|
|
*
|
|
* Fourcc: rpza, azpr
|
|
*
|
|
* Some code comes from qtsmc.c by Mike Melanson
|
|
*
|
|
* A description of the decoding algorithm can be found here:
|
|
* http://www.pcisys.net/~melanson/codecs/
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "bswap.h"
|
|
#include "mp_msg.h"
|
|
|
|
#define BE_16(x) (be2me_16(*(unsigned short *)(x)))
|
|
#define BE_32(x) (be2me_32(*(unsigned int *)(x)))
|
|
|
|
|
|
#define ADVANCE_BLOCK() \
|
|
{ \
|
|
pixel_ptr += block_x_inc; \
|
|
if (pixel_ptr >= (width * bytes_per_pixel)) \
|
|
{ \
|
|
pixel_ptr = 0; \
|
|
row_ptr += block_y_inc * 4; \
|
|
} \
|
|
total_blocks--; \
|
|
if (total_blocks < 0) \
|
|
{ \
|
|
mp_msg(MSGT_DECVIDEO, MSGL_WARN, "block counter just went negative (this should not happen)\n"); \
|
|
return; \
|
|
} \
|
|
}
|
|
|
|
#define PAINT_CURRENT_PIXEL(r, g, b, color) \
|
|
{ \
|
|
if (bytes_per_pixel == 2) { \
|
|
(*(unsigned short*)(&decoded[block_ptr])) = color & 0x7fff; \
|
|
block_ptr += 2; \
|
|
} else { \
|
|
decoded[block_ptr++] = (b); \
|
|
decoded[block_ptr++] = (g); \
|
|
decoded[block_ptr++] = (r); \
|
|
if (bytes_per_pixel == 4) /* 32bpp */ \
|
|
block_ptr++; \
|
|
} \
|
|
}
|
|
|
|
#define COLOR_FIX(col_out, col_in) (col_out) = ((col_in) << 3) | ((col_in) >> 2)
|
|
|
|
#define COLOR_TO_RGB(r, g, b, color) \
|
|
{ \
|
|
if (bytes_per_pixel != 2) { \
|
|
unsigned short tmp; \
|
|
tmp = (color >> 10) & 0x1f; \
|
|
COLOR_FIX (r, tmp); \
|
|
tmp = (color >> 5) & 0x1f; \
|
|
COLOR_FIX (g, tmp); \
|
|
tmp = color & 0x1f; \
|
|
COLOR_FIX (b, tmp); \
|
|
} \
|
|
}
|
|
|
|
#define COLORAB_TO_RGB4(rgb4, color4, colorA, colorB) \
|
|
{ \
|
|
unsigned short ta, tb, tt; \
|
|
if (bytes_per_pixel != 2) { \
|
|
ta = (colorA >> 10) & 0x1f; \
|
|
tb = (colorB >> 10) & 0x1f; \
|
|
COLOR_FIX (rgb4[3][0], ta); \
|
|
COLOR_FIX (rgb4[0][0], tb); \
|
|
tt = (11 * ta + 21 * tb) >> 5; \
|
|
COLOR_FIX (rgb4[1][0], tt); \
|
|
tt = (21 * ta + 11 * tb) >> 5; \
|
|
COLOR_FIX (rgb4[2][0], tt); \
|
|
ta = (colorA >> 5) & 0x1f; \
|
|
tb = (colorB >> 5) & 0x1f; \
|
|
COLOR_FIX (rgb4[3][1], ta); \
|
|
COLOR_FIX (rgb4[0][1], tb); \
|
|
tt = (11 * ta + 21 * tb) >> 5; \
|
|
COLOR_FIX (rgb4[1][1], tt); \
|
|
tt = (21 * ta + 11 * tb) >> 5; \
|
|
COLOR_FIX (rgb4[2][1], tt); \
|
|
ta = colorA & 0x1f; \
|
|
tb = colorB & 0x1f; \
|
|
COLOR_FIX (rgb4[3][2], ta); \
|
|
COLOR_FIX (rgb4[0][2], tb); \
|
|
tt = (11 * ta + 21 * tb) >> 5; \
|
|
COLOR_FIX (rgb4[1][2], tt); \
|
|
tt = (21 * ta + 11 * tb) >> 5; \
|
|
COLOR_FIX (rgb4[2][2], tt); \
|
|
} else { \
|
|
color4[3] = colorA; \
|
|
color4[0] = colorB; \
|
|
ta = (colorA >> 10) & 0x1f; \
|
|
tb = (colorB >> 10) & 0x1f; \
|
|
color4[1] = ((11 * ta + 21 * tb) << 5) & 0x7c00; \
|
|
color4[2] = ((21 * ta + 11 * tb) << 5) & 0x7c00; \
|
|
ta = (colorA >> 5) & 0x1f; \
|
|
tb = (colorB >> 5) & 0x1f; \
|
|
color4[1] |= (11 * ta + 21 * tb) & 0x3e0; \
|
|
color4[2] |= (21 * ta + 11 * tb) & 0x3e0; \
|
|
ta = colorA & 0x1f; \
|
|
tb = colorB & 0x1f; \
|
|
color4[1] |= (11 * ta + 21 * tb) >> 5; \
|
|
color4[2] |= (21 * ta + 11 * tb) >> 5; \
|
|
} \
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* rpza frame decoder
|
|
*
|
|
* Input values:
|
|
*
|
|
* *encoded: buffer of encoded data (chunk)
|
|
* encoded_size: length of encoded buffer
|
|
* *decoded: buffer where decoded data is written (image buffer)
|
|
* width: width of decoded frame in pixels
|
|
* height: height of decoded frame in pixels
|
|
* bytes_per_pixel: bytes/pixel in output image (color depth)
|
|
*
|
|
*/
|
|
|
|
void qt_decode_rpza(char *encoded, int encoded_size, char *decoded, int width,
|
|
int height, int bytes_per_pixel)
|
|
{
|
|
|
|
int i;
|
|
int stream_ptr = 0;
|
|
int chunk_size;
|
|
unsigned char opcode;
|
|
int n_blocks;
|
|
unsigned short colorA, colorB;
|
|
unsigned char r, g, b;
|
|
unsigned char rgb4[4][3];
|
|
unsigned short color4[4];
|
|
unsigned char index, idx;
|
|
|
|
int row_ptr = 0;
|
|
int pixel_ptr = 0;
|
|
int pixel_x, pixel_y;
|
|
int row_inc = bytes_per_pixel * (width - 4);
|
|
int max_height = row_inc * height;
|
|
int block_x_inc = bytes_per_pixel * 4;
|
|
int block_y_inc = bytes_per_pixel * width;
|
|
int block_ptr;
|
|
int total_blocks;
|
|
|
|
|
|
/* First byte is always 0xe1. Warn if it's different */
|
|
if ((unsigned char)encoded[stream_ptr] != 0xe1)
|
|
mp_msg(MSGT_DECVIDEO, MSGL_WARN,
|
|
"First chunk byte is 0x%02x instead of 0x1e\n",
|
|
(unsigned char)encoded[stream_ptr]);
|
|
|
|
/* Get chunk size, ingnoring first byte */
|
|
chunk_size = BE_32(&encoded[stream_ptr]) & 0x00FFFFFF;
|
|
stream_ptr += 4;
|
|
|
|
/* If length mismatch use size from MOV file and try to decode anyway */
|
|
if (chunk_size != encoded_size)
|
|
mp_msg(MSGT_DECVIDEO, MSGL_WARN, "MOV chunk size != encoded chunk size; using MOV chunk size\n");
|
|
|
|
chunk_size = encoded_size;
|
|
|
|
/* Number of 4x4 blocks in frame. */
|
|
total_blocks = (width * height) / (4 * 4);
|
|
|
|
/* Process chunk data */
|
|
while (stream_ptr < chunk_size) {
|
|
opcode = encoded[stream_ptr++]; /* Get opcode */
|
|
|
|
n_blocks = (opcode & 0x1f) +1; /* Extract block counter from opcode */
|
|
|
|
/* If opcode MSbit is 0, we need more data to decide what to do */
|
|
if ((opcode & 0x80) == 0) {
|
|
colorA = (opcode << 8) | ((unsigned char)encoded[stream_ptr++]);
|
|
opcode = 0;
|
|
if ((encoded[stream_ptr] & 0x80) != 0) {
|
|
/* Must behave as opcode 110xxxxx, using colorA computed above.*/
|
|
/* Use fake opcode 0x20 to enter switch block at the right place */
|
|
opcode = 0x20;
|
|
n_blocks = 1;
|
|
}
|
|
}
|
|
switch (opcode & 0xe0) {
|
|
/* Skip blocks */
|
|
case 0x80:
|
|
while (n_blocks--)
|
|
ADVANCE_BLOCK();
|
|
break;
|
|
|
|
/* Fill blocks with one color */
|
|
case 0xa0:
|
|
colorA = BE_16 (&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
COLOR_TO_RGB (r, g, b, colorA);
|
|
while (n_blocks--) {
|
|
block_ptr = row_ptr + pixel_ptr;
|
|
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
|
|
for (pixel_x = 0; pixel_x < 4; pixel_x++){
|
|
PAINT_CURRENT_PIXEL(r, g, b, colorA);
|
|
}
|
|
block_ptr += row_inc;
|
|
}
|
|
ADVANCE_BLOCK();
|
|
}
|
|
break;
|
|
|
|
/* Fill blocks with 4 colors */
|
|
case 0xc0:
|
|
colorA = BE_16 (&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
case 0x20:
|
|
colorB = BE_16 (&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
COLORAB_TO_RGB4 (rgb4, color4, colorA, colorB);
|
|
while (n_blocks--) {
|
|
block_ptr = row_ptr + pixel_ptr;
|
|
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
|
|
index = encoded[stream_ptr++];
|
|
for (pixel_x = 0; pixel_x < 4; pixel_x++){
|
|
idx = (index >> (2 * (3 - pixel_x))) & 0x03;
|
|
PAINT_CURRENT_PIXEL(rgb4[idx][0], rgb4[idx][1], rgb4[idx][2], color4[idx]);
|
|
}
|
|
block_ptr += row_inc;
|
|
}
|
|
ADVANCE_BLOCK();
|
|
}
|
|
break;
|
|
|
|
/* Fill block with 16 colors */
|
|
case 0x00:
|
|
block_ptr = row_ptr + pixel_ptr;
|
|
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
|
|
for (pixel_x = 0; pixel_x < 4; pixel_x++){
|
|
/* We already have color of upper left pixel */
|
|
if ((pixel_y != 0) || (pixel_x !=0)) {
|
|
colorA = BE_16 (&encoded[stream_ptr]);
|
|
stream_ptr += 2;
|
|
}
|
|
COLOR_TO_RGB (r, g, b, colorA);
|
|
PAINT_CURRENT_PIXEL(r, g, b, colorA);
|
|
}
|
|
block_ptr += row_inc;
|
|
}
|
|
ADVANCE_BLOCK();
|
|
break;
|
|
|
|
/* Unknown opcode */
|
|
default:
|
|
mp_msg(MSGT_DECVIDEO, MSGL_HINT, "Unknown opcode %d in rpza chunk."
|
|
" Skip remaining %lu bytes of chunk data.\n", opcode,
|
|
chunk_size - stream_ptr);
|
|
return;
|
|
} /* Opcode switch */
|
|
|
|
}
|
|
}
|