- int idx;
- if(blocks >= s->blocks || y >= s->height)
- break;//all blocks decoded
-
- idx = *buf++;
- if((idx & 0xF8) == 0x70) {
- switch(idx) {
- case 0x70: //change modifier
- modifier = *buf++;
- if(modifier>1)
- av_log(avctx, AV_LOG_INFO, "warning: modifier must be 0 or 1, got %i\n", modifier);
- break;
- case 0x71: // set uniq flag
- uniq = 1;
- break;
- case 0x72: //toggle mode
- mode = !mode;
- break;
- case 0x73: //end-of-frame
- done = 1;
- break;
- case 0x74: //skip some blocks
- skip = *buf++;
- if ((blocks + skip) >= s->blocks)
- break;
- blocks += skip;
- x += skip * 8;
- while(x >= s->width) {
- x -= s->width;
- y += 8;
- }
- break;
- default:
- av_log(avctx, AV_LOG_INFO, "warning: unknown escape 0x%02X\n", idx);
- }
- } else { //handle one block
- int code;
- int cf;
- int angle = 0;
- uint8_t Y[4]; // luma samples of block
- int tx = 0, ty = 0; //coords of subblock
- int chroma = 0;
- if (mode || uniq) {
- uniq = 0;
- cf = 1;
- chroma = 0;
- } else {
- cf = 0;
- if (idx)
- chroma = *buf++;
- }
- for (i = 0; i < 4; i++) { // for every subblock
- code = (idx >> (6 - i*2)) & 3; //extract 2 bits
- if(!code) //skip subblock
- continue;
- if(cf)
- chroma = *buf++;
- tx = x + block_coords[i * 2];
- ty = y + block_coords[(i * 2) + 1];
- switch(code) {
- case 1:
- tmp = *buf++;
-
- angle = angle_by_index[(tmp >> 6) & 0x3];
-
- Y[0] = tmp & 0x3F;
- Y[1] = Y[0];
-
- if (angle) {
- Y[2] = Y[0]+1;
- if (Y[2] > 0x3F)
- Y[2] = 0x3F;
- Y[3] = Y[2];
- } else {
- Y[2] = Y[0];
- Y[3] = Y[0];
- }
- break;
-
- case 2:
- if (modifier) { // unpack four luma samples
- tmp = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *buf++;
-
- Y[0] = (tmp >> 18) & 0x3F;
- Y[1] = (tmp >> 12) & 0x3F;
- Y[2] = (tmp >> 6) & 0x3F;
- Y[3] = tmp & 0x3F;
- angle = 16;
- } else { // retrieve luma samples from codebook
- tmp = (*buf++) << 8;
- tmp += (*buf++);
-
- angle = (tmp >> 12) & 0xF;
- tmp &= 0xFFF;
- tmp <<= 2;
- Y[0] = s->ulti_codebook[tmp];
- Y[1] = s->ulti_codebook[tmp + 1];
- Y[2] = s->ulti_codebook[tmp + 2];
- Y[3] = s->ulti_codebook[tmp + 3];
- }
- break;
-
- case 3:
- if (modifier) { // all 16 luma samples
- uint8_t Luma[16];
-
- tmp = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *buf++;
- Luma[0] = (tmp >> 18) & 0x3F;
- Luma[1] = (tmp >> 12) & 0x3F;
- Luma[2] = (tmp >> 6) & 0x3F;
- Luma[3] = tmp & 0x3F;
-
- tmp = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *buf++;
- Luma[4] = (tmp >> 18) & 0x3F;
- Luma[5] = (tmp >> 12) & 0x3F;
- Luma[6] = (tmp >> 6) & 0x3F;
- Luma[7] = tmp & 0x3F;
-
- tmp = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *buf++;
- Luma[8] = (tmp >> 18) & 0x3F;
- Luma[9] = (tmp >> 12) & 0x3F;
- Luma[10] = (tmp >> 6) & 0x3F;
- Luma[11] = tmp & 0x3F;
-
- tmp = (*buf++) << 16;
- tmp += (*buf++) << 8;
- tmp += *buf++;
- Luma[12] = (tmp >> 18) & 0x3F;
- Luma[13] = (tmp >> 12) & 0x3F;
- Luma[14] = (tmp >> 6) & 0x3F;
- Luma[15] = tmp & 0x3F;
-
- ulti_convert_yuv(&s->frame, tx, ty, Luma, chroma);
- } else {
- tmp = *buf++;
- if(tmp & 0x80) {
- angle = (tmp >> 4) & 0x7;
- tmp = (tmp << 8) + *buf++;
- Y[0] = (tmp >> 6) & 0x3F;
- Y[1] = tmp & 0x3F;
- Y[2] = (*buf++) & 0x3F;
- Y[3] = (*buf++) & 0x3F;
- ulti_grad(&s->frame, tx, ty, Y, chroma, angle); //draw block
- } else { // some patterns
- int f0, f1;
- f0 = *buf++;
- f1 = tmp;
- Y[0] = (*buf++) & 0x3F;
- Y[1] = (*buf++) & 0x3F;
- ulti_pattern(&s->frame, tx, ty, f1, f0, Y[0], Y[1], chroma);
- }
- }
- break;
- }
- if(code != 3)
- ulti_grad(&s->frame, tx, ty, Y, chroma, angle); // draw block
- }
- blocks++;
- x += 8;
- if(x >= s->width) {
- x = 0;
- y += 8;
- }
- }
+ int idx;
+ if(blocks >= s->blocks || y >= s->height)
+ break;//all blocks decoded
+
+ idx = *buf++;
+ if((idx & 0xF8) == 0x70) {
+ switch(idx) {
+ case 0x70: //change modifier
+ modifier = *buf++;
+ if(modifier>1)
+ av_log(avctx, AV_LOG_INFO, "warning: modifier must be 0 or 1, got %i\n", modifier);
+ break;
+ case 0x71: // set uniq flag
+ uniq = 1;
+ break;
+ case 0x72: //toggle mode
+ mode = !mode;
+ break;
+ case 0x73: //end-of-frame
+ done = 1;
+ break;
+ case 0x74: //skip some blocks
+ skip = *buf++;
+ if ((blocks + skip) >= s->blocks)
+ break;
+ blocks += skip;
+ x += skip * 8;
+ while(x >= s->width) {
+ x -= s->width;
+ y += 8;
+ }
+ break;
+ default:
+ av_log(avctx, AV_LOG_INFO, "warning: unknown escape 0x%02X\n", idx);
+ }
+ } else { //handle one block
+ int code;
+ int cf;
+ int angle = 0;
+ uint8_t Y[4]; // luma samples of block
+ int tx = 0, ty = 0; //coords of subblock
+ int chroma = 0;
+ if (mode || uniq) {
+ uniq = 0;
+ cf = 1;
+ chroma = 0;
+ } else {
+ cf = 0;
+ if (idx)
+ chroma = *buf++;
+ }
+ for (i = 0; i < 4; i++) { // for every subblock
+ code = (idx >> (6 - i*2)) & 3; //extract 2 bits
+ if(!code) //skip subblock
+ continue;
+ if(cf)
+ chroma = *buf++;
+ tx = x + block_coords[i * 2];
+ ty = y + block_coords[(i * 2) + 1];
+ switch(code) {
+ case 1:
+ tmp = *buf++;
+
+ angle = angle_by_index[(tmp >> 6) & 0x3];
+
+ Y[0] = tmp & 0x3F;
+ Y[1] = Y[0];
+
+ if (angle) {
+ Y[2] = Y[0]+1;
+ if (Y[2] > 0x3F)
+ Y[2] = 0x3F;
+ Y[3] = Y[2];
+ } else {
+ Y[2] = Y[0];
+ Y[3] = Y[0];
+ }
+ break;
+
+ case 2:
+ if (modifier) { // unpack four luma samples
+ tmp = bytestream_get_be24(&buf);
+
+ Y[0] = (tmp >> 18) & 0x3F;
+ Y[1] = (tmp >> 12) & 0x3F;
+ Y[2] = (tmp >> 6) & 0x3F;
+ Y[3] = tmp & 0x3F;
+ angle = 16;
+ } else { // retrieve luma samples from codebook
+ tmp = bytestream_get_be16(&buf);
+
+ angle = (tmp >> 12) & 0xF;
+ tmp &= 0xFFF;
+ tmp <<= 2;
+ Y[0] = s->ulti_codebook[tmp];
+ Y[1] = s->ulti_codebook[tmp + 1];
+ Y[2] = s->ulti_codebook[tmp + 2];
+ Y[3] = s->ulti_codebook[tmp + 3];
+ }
+ break;
+
+ case 3:
+ if (modifier) { // all 16 luma samples
+ uint8_t Luma[16];
+
+ tmp = bytestream_get_be24(&buf);
+ Luma[0] = (tmp >> 18) & 0x3F;
+ Luma[1] = (tmp >> 12) & 0x3F;
+ Luma[2] = (tmp >> 6) & 0x3F;
+ Luma[3] = tmp & 0x3F;
+
+ tmp = bytestream_get_be24(&buf);
+ Luma[4] = (tmp >> 18) & 0x3F;
+ Luma[5] = (tmp >> 12) & 0x3F;
+ Luma[6] = (tmp >> 6) & 0x3F;
+ Luma[7] = tmp & 0x3F;
+
+ tmp = bytestream_get_be24(&buf);
+ Luma[8] = (tmp >> 18) & 0x3F;
+ Luma[9] = (tmp >> 12) & 0x3F;
+ Luma[10] = (tmp >> 6) & 0x3F;
+ Luma[11] = tmp & 0x3F;
+
+ tmp = bytestream_get_be24(&buf);
+ Luma[12] = (tmp >> 18) & 0x3F;
+ Luma[13] = (tmp >> 12) & 0x3F;
+ Luma[14] = (tmp >> 6) & 0x3F;
+ Luma[15] = tmp & 0x3F;
+
+ ulti_convert_yuv(&s->frame, tx, ty, Luma, chroma);
+ } else {
+ tmp = *buf++;
+ if(tmp & 0x80) {
+ angle = (tmp >> 4) & 0x7;
+ tmp = (tmp << 8) + *buf++;
+ Y[0] = (tmp >> 6) & 0x3F;
+ Y[1] = tmp & 0x3F;
+ Y[2] = (*buf++) & 0x3F;
+ Y[3] = (*buf++) & 0x3F;
+ ulti_grad(&s->frame, tx, ty, Y, chroma, angle); //draw block
+ } else { // some patterns
+ int f0, f1;
+ f0 = *buf++;
+ f1 = tmp;
+ Y[0] = (*buf++) & 0x3F;
+ Y[1] = (*buf++) & 0x3F;
+ ulti_pattern(&s->frame, tx, ty, f1, f0, Y[0], Y[1], chroma);
+ }
+ }
+ break;
+ }
+ if(code != 3)
+ ulti_grad(&s->frame, tx, ty, Y, chroma, angle); // draw block
+ }
+ blocks++;
+ x += 8;
+ if(x >= s->width) {
+ x = 0;
+ y += 8;
+ }
+ }