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fixed some major flaws; decoder is now almost correct 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4299 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
melanson 2002-01-22 02:00:57 +00:00
parent df864731f8
commit ec6bacbca3
1 changed files with 28 additions and 12 deletions
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40
qtsmc.c
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@ -49,10 +49,6 @@ int qt_init_decode_smc(void)
COLORS_PER_TABLE * BYTES_PER_COLOR * 8)) == 0)
return 1;
color_pair_index = 0;
color_quad_index = 0;
color_octet_index = 0;
// if execution got this far, initialization succeeded
smc_initialized = 1;
return 0;
@ -65,6 +61,7 @@ int qt_init_decode_smc(void)
pixel_ptr += block_x_inc; \
if (pixel_ptr >= (width * bytes_per_pixel)) \
{ \
counter++; \
pixel_ptr = 0; \
row_ptr += block_y_inc * 4; \
} \
@ -118,6 +115,11 @@ counter = 0;
if (!smc_initialized)
return;
// reset color tables
color_pair_index = 0;
color_quad_index = 0;
color_octet_index = 0;
chunk_size = BE_32(&encoded[stream_ptr]) & 0x00FFFFFF;
stream_ptr += 4;
if (chunk_size != encoded_size)
@ -148,8 +150,8 @@ counter = 0;
}
opcode = encoded[stream_ptr++];
//printf ("opcode %02X\n", opcode & 0xF0);
counter++;
//if (counter < 3)
//printf ("%d: opcode %02X\n", counter, opcode);
switch (opcode & 0xF0)
{
// skip n blocks
@ -263,6 +265,7 @@ counter++;
case 0x60:
case 0x70:
n_blocks = GET_BLOCK_COUNT;
//printf ("1-color encoding for %d blocks\n", n_blocks);
color_index = encoded[stream_ptr++] * 4;
while (n_blocks--)
@ -428,14 +431,27 @@ counter++;
while (n_blocks--)
{
/*
For this input:
01 23 45 67 89 AB
This is the output:
flags_a = xx012456, flags_b = xx89A37B
*/
// build the color flags
color_flags_a = color_flags_b = 0;
color_flags_a |= (encoded[stream_ptr++] << 16);
color_flags_b |= (encoded[stream_ptr++] << 16);
color_flags_a |= (encoded[stream_ptr++] << 8);
color_flags_b |= (encoded[stream_ptr++] << 8);
color_flags_a |= (encoded[stream_ptr++] << 0);
color_flags_b |= (encoded[stream_ptr++] << 0);
color_flags_a =
(encoded[stream_ptr + 0] << 16) |
((encoded[stream_ptr + 1] & 0xF0) << 8) |
((encoded[stream_ptr + 2] & 0xF0) << 4) |
((encoded[stream_ptr + 2] & 0x0F) << 4) |
((encoded[stream_ptr + 3] & 0xF0) >> 4);
color_flags_b =
(encoded[stream_ptr + 4] << 16) |
((encoded[stream_ptr + 5] & 0xF0) << 8) |
((encoded[stream_ptr + 1] & 0x0F) << 8) |
((encoded[stream_ptr + 3] & 0x0F) << 4) |
(encoded[stream_ptr + 5] & 0x0F);
stream_ptr += 6;
color_flags = color_flags_a;
// flag mask actually acts as a bit shift count here