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Code Issues Releases Activity

wrong, wrong, wrong...coded bits are read in the opposite direction

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Originally committed as revision 2289 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Mike Melanson 2003-09-17 05:17:31 +00:00
parent c9d88b14c7
commit 7581685205
1 changed files with 57 additions and 56 deletions
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113
libavcodec/interplayvideo.c
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@ -292,7 +292,7 @@ static int ipvideo_decode_block_opcode_0x7(void)
for (y = 0; y < 8; y++) {
flags = B[y];
for (x = 0x80; x != 0; x >>= 1) {
for (x = 0x01; x <= 0x80; x <<= 1) {
if (flags & x)
*sg_output_plane++ = P1;
else
@ -308,10 +308,10 @@ static int ipvideo_decode_block_opcode_0x7(void)
B[0] = *sg_stream_ptr++;
B[1] = *sg_stream_ptr++;
flags = (B[0] << 8) | B[1];
bitmask = 0x8000;
flags = (B[1] << 8) | B[0];
bitmask = 0x0001;
for (y = 0; y < 8; y += 2) {
for (x = 0; x < 8; x += 2, bitmask >>= 1) {
for (x = 0; x < 8; x += 2, bitmask <<= 1) {
if (flags & bitmask) {
*(sg_output_plane + x) = P0;
*(sg_output_plane + x + 1) = P0;
@ -366,23 +366,23 @@ static int ipvideo_decode_block_opcode_0x8(void)
/* time to reload flags? */
if (y == 0) {
flags =
((B[0] & 0xF0) << 24) | ((B[4] & 0xF0) << 20) |
((B[0] & 0x0F) << 20) | ((B[4] & 0x0F) << 16) |
((B[1] & 0xF0) << 8) | ((B[5] & 0xF0) << 4) |
((B[1] & 0x0F) << 4) | ((B[5] & 0x0F) << 0);
bitmask = 0x80000000;
((B[0] & 0xF0) << 4) | ((B[4] & 0xF0) << 8) |
((B[0] & 0x0F) ) | ((B[4] & 0x0F) << 4) |
((B[1] & 0xF0) << 20) | ((B[5] & 0xF0) << 24) |
((B[1] & 0x0F) << 16) | ((B[5] & 0x0F) << 20);
bitmask = 0x00000001;
lower_half = 0; /* still on top half */
} else if (y == 4) {
flags =
((B[2] & 0xF0) << 24) | ((B[6] & 0xF0) << 20) |
((B[2] & 0x0F) << 20) | ((B[6] & 0x0F) << 16) |
((B[3] & 0xF0) << 8) | ((B[7] & 0xF0) << 4) |
((B[3] & 0x0F) << 4) | ((B[7] & 0x0F) << 0);
bitmask = 0x80000000;
((B[2] & 0xF0) << 4) | ((B[6] & 0xF0) << 8) |
((B[2] & 0x0F) ) | ((B[6] & 0x0F) << 4) |
((B[3] & 0xF0) << 20) | ((B[7] & 0xF0) << 24) |
((B[3] & 0x0F) << 16) | ((B[7] & 0x0F) << 20);
bitmask = 0x00000001;
lower_half = 4;
}
for (x = 0; x < 8; x++, bitmask >>= 1) {
for (x = 0; x < 8; x++, bitmask <<= 1) {
/* get the pixel values ready for this quadrant */
if (x == 0) {
P0 = P[lower_half + 0];
@ -419,21 +419,21 @@ static int ipvideo_decode_block_opcode_0x8(void)
/* time to reload flags? */
if (y == 0) {
flags =
((B[0] & 0xF0) << 24) | ((B[4] & 0xF0) << 20) |
((B[0] & 0x0F) << 20) | ((B[4] & 0x0F) << 16) |
((B[1] & 0xF0) << 8) | ((B[5] & 0xF0) << 4) |
((B[1] & 0x0F) << 4) | ((B[5] & 0x0F) << 0);
bitmask = 0x80000000;
((B[0] & 0xF0) << 4) | ((B[4] & 0xF0) << 8) |
((B[0] & 0x0F) ) | ((B[4] & 0x0F) << 4) |
((B[1] & 0xF0) << 20) | ((B[5] & 0xF0) << 24) |
((B[1] & 0x0F) << 16) | ((B[5] & 0x0F) << 20);
bitmask = 0x00000001;
} else if (y == 4) {
flags =
((B[2] & 0xF0) << 24) | ((B[6] & 0xF0) << 20) |
((B[2] & 0x0F) << 20) | ((B[6] & 0x0F) << 16) |
((B[3] & 0xF0) << 8) | ((B[7] & 0xF0) << 4) |
((B[3] & 0x0F) << 4) | ((B[7] & 0x0F) << 0);
bitmask = 0x80000000;
((B[2] & 0xF0) << 4) | ((B[6] & 0xF0) << 8) |
((B[2] & 0x0F) ) | ((B[6] & 0x0F) << 4) |
((B[3] & 0xF0) << 20) | ((B[7] & 0xF0) << 24) |
((B[3] & 0x0F) << 16) | ((B[7] & 0x0F) << 20);
bitmask = 0x00000001;
}
for (x = 0; x < 8; x++, bitmask >>= 1) {
for (x = 0; x < 8; x++, bitmask <<= 1) {
/* get the pixel values ready for this half */
if (x == 0) {
P0 = P[0];
@ -466,7 +466,7 @@ static int ipvideo_decode_block_opcode_0x8(void)
P1 = P[3];
}
for (bitmask = 0x80; bitmask != 0; bitmask >>= 1) {
for (bitmask = 0x01; bitmask <= 0x80; bitmask <<= 1) {
if (flags & bitmask)
*sg_output_plane++ = P0;
@ -486,6 +486,7 @@ static int ipvideo_decode_block_opcode_0x9(void)
{
int x, y;
unsigned char P[4];
unsigned char B[4];
unsigned int flags = 0;
int shifter = 0;
unsigned char pix;
@ -503,9 +504,9 @@ static int ipvideo_decode_block_opcode_0x9(void)
for (y = 0; y < 8; y++) {
/* get the next set of 8 2-bit flags */
flags = (sg_stream_ptr[0] << 8) | sg_stream_ptr[1];
flags = (sg_stream_ptr[1] << 8) | sg_stream_ptr[0];
sg_stream_ptr += 2;
for (x = 0, shifter = 14; x < 8; x++, shifter -= 2) {
for (x = 0, shifter = 0; x < 8; x++, shifter += 2) {
*sg_output_plane++ = P[(flags >> shifter) & 0x03];
}
sg_output_plane += sg_line_inc;
@ -516,15 +517,15 @@ static int ipvideo_decode_block_opcode_0x9(void)
/* 1 of 4 colors for each 2x2 block, need 4 more bytes */
CHECK_STREAM_PTR(4);
flags = 0;
flags = (flags << 8) | *sg_stream_ptr++;
flags = (flags << 8) | *sg_stream_ptr++;
flags = (flags << 8) | *sg_stream_ptr++;
flags = (flags << 8) | *sg_stream_ptr++;
shifter = 30;
B[0] = *sg_stream_ptr++;
B[1] = *sg_stream_ptr++;
B[2] = *sg_stream_ptr++;
B[3] = *sg_stream_ptr++;
flags = (B[3] << 24) | (B[2] << 16) | (B[1] << 8) | B[0];
shifter = 0;
for (y = 0; y < 8; y += 2) {
for (x = 0; x < 8; x += 2, shifter -= 2) {
for (x = 0; x < 8; x += 2, shifter += 2) {
pix = P[(flags >> shifter) & 0x03];
*(sg_output_plane + x) = pix;
*(sg_output_plane + x + 1) = pix;
@ -542,14 +543,14 @@ static int ipvideo_decode_block_opcode_0x9(void)
for (y = 0; y < 8; y++) {
/* time to reload flags? */
if ((y == 0) || (y == 4)) {
flags = 0;
flags = (flags << 8) | *sg_stream_ptr++;
flags = (flags << 8) | *sg_stream_ptr++;
flags = (flags << 8) | *sg_stream_ptr++;
flags = (flags << 8) | *sg_stream_ptr++;
shifter = 30;
B[0] = *sg_stream_ptr++;
B[1] = *sg_stream_ptr++;
B[2] = *sg_stream_ptr++;
B[3] = *sg_stream_ptr++;
flags = (B[3] << 24) | (B[2] << 16) | (B[1] << 8) | B[0];
shifter = 0;
}
for (x = 0; x < 8; x += 2, shifter -= 2) {
for (x = 0; x < 8; x += 2, shifter += 2) {
pix = P[(flags >> shifter) & 0x03];
*(sg_output_plane + x) = pix;
*(sg_output_plane + x + 1) = pix;
@ -565,14 +566,14 @@ static int ipvideo_decode_block_opcode_0x9(void)
for (y = 0; y < 8; y += 2) {
/* time to reload flags? */
if ((y == 0) || (y == 4)) {
flags = 0;
flags = (flags << 8) | *sg_stream_ptr++;
flags = (flags << 8) | *sg_stream_ptr++;
flags = (flags << 8) | *sg_stream_ptr++;
flags = (flags << 8) | *sg_stream_ptr++;
shifter = 30;
B[0] = *sg_stream_ptr++;
B[1] = *sg_stream_ptr++;
B[2] = *sg_stream_ptr++;
B[3] = *sg_stream_ptr++;
flags = (B[3] << 24) | (B[2] << 16) | (B[1] << 8) | B[0];
shifter = 0;
}
for (x = 0; x < 8; x++, shifter -= 2) {
for (x = 0; x < 8; x++, shifter += 2) {
pix = P[(flags >> shifter) & 0x03];
*(sg_output_plane + x) = pix;
*(sg_output_plane + sg_stride + x) = pix;
@ -620,9 +621,9 @@ static int ipvideo_decode_block_opcode_0xA(void)
for (y = 0; y < 8; y++) {
lower_half = (y >= 4) ? 4 : 0;
flags = (B[y] << 8) | B[y + 8];
flags = (B[y + 8] << 8) | B[y];
for (x = 0, shifter = 14; x < 8; x++, shifter -= 2) {
for (x = 0, shifter = 0; x < 8; x++, shifter += 2) {
split = (x >= 4) ? 8 : 0;
index = split + lower_half + ((flags >> shifter) & 0x03);
*sg_output_plane++ = P[index];
@ -649,10 +650,10 @@ static int ipvideo_decode_block_opcode_0xA(void)
/* block is divided into left and right halves */
for (y = 0; y < 8; y++) {
flags = (B[y] << 8) | B[y + 8];
flags = (B[y + 8] << 8) | B[y];
split = 0;
for (x = 0, shifter = 14; x < 8; x++, shifter -= 2) {
for (x = 0, shifter = 0; x < 8; x++, shifter += 2) {
if (x == 4)
split = 4;
*sg_output_plane++ = P[split + ((flags >> shifter) & 0x03)];
@ -667,11 +668,11 @@ static int ipvideo_decode_block_opcode_0xA(void)
split = 0;
for (y = 0; y < 8; y++) {
flags = (B[y * 2] << 8) | B[y * 2 + 1];
flags = (B[y * 2 + 1] << 8) | B[y * 2];
if (y == 4)
split = 4;
for (x = 0, shifter = 14; x < 8; x++, shifter -= 2)
for (x = 0, shifter = 0; x < 8; x++, shifter += 2)
*sg_output_plane++ = P[split + ((flags >> shifter) & 0x03)];
sg_output_plane += sg_line_inc;