52 const unsigned char *
buf;
57 #define ADVANCE_BLOCK() \
60 if (pixel_ptr >= width) \
63 row_ptr += stride * 4; \
66 if (total_blocks < 0) \
68 av_log(s->avctx, AV_LOG_ERROR, "warning: block counter just went negative (this should not happen)\n"); \
77 int row_inc = stride - 4;
82 unsigned short colorA = 0, colorB;
83 unsigned short color4[4];
84 unsigned char index, idx;
85 unsigned short ta, tb;
86 unsigned short *pixels = (
unsigned short *)s->
frame.
data[0];
95 if (s->
buf[stream_ptr] != 0xe1)
100 chunk_size =
AV_RB32(&s->
buf[stream_ptr]) & 0x00FFFFFF;
104 if (chunk_size != s->
size)
107 chunk_size = s->
size;
113 while (stream_ptr < chunk_size) {
114 opcode = s->
buf[stream_ptr++];
116 n_blocks = (opcode & 0x1f) + 1;
119 if ((opcode & 0x80) == 0) {
120 colorA = (opcode << 8) | (s->
buf[stream_ptr++]);
122 if ((s->
buf[stream_ptr] & 0x80) != 0) {
131 n_blocks =
FFMIN(n_blocks, total_blocks);
133 switch (opcode & 0xe0) {
147 block_ptr = row_ptr + pixel_ptr;
148 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
149 for (pixel_x = 0; pixel_x < 4; pixel_x++){
150 pixels[block_ptr] = colorA;
153 block_ptr += row_inc;
174 ta = (colorA >> 10) & 0x1F;
175 tb = (colorB >> 10) & 0x1F;
176 color4[1] |= ((11 * ta + 21 * tb) >> 5) << 10;
177 color4[2] |= ((21 * ta + 11 * tb) >> 5) << 10;
180 ta = (colorA >> 5) & 0x1F;
181 tb = (colorB >> 5) & 0x1F;
182 color4[1] |= ((11 * ta + 21 * tb) >> 5) << 5;
183 color4[2] |= ((21 * ta + 11 * tb) >> 5) << 5;
188 color4[1] |= ((11 * ta + 21 * tb) >> 5);
189 color4[2] |= ((21 * ta + 11 * tb) >> 5);
191 if (s->
size - stream_ptr < n_blocks * 4)
194 block_ptr = row_ptr + pixel_ptr;
195 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
196 index = s->
buf[stream_ptr++];
197 for (pixel_x = 0; pixel_x < 4; pixel_x++){
198 idx = (index >> (2 * (3 - pixel_x))) & 0x03;
199 pixels[block_ptr] = color4[idx];
202 block_ptr += row_inc;
210 if (s->
size - stream_ptr < 30)
212 block_ptr = row_ptr + pixel_ptr;
213 for (pixel_y = 0; pixel_y < 4; pixel_y++) {
214 for (pixel_x = 0; pixel_x < 4; pixel_x++){
216 if ((pixel_y != 0) || (pixel_x !=0)) {
220 pixels[block_ptr] = colorA;
223 block_ptr += row_inc;
231 " Skip remaining %d bytes of chunk data.\n", opcode,
232 chunk_size - stream_ptr);
251 void *
data,
int *got_frame,
255 int buf_size = avpkt->
size;