| 76 | } |
| 77 | |
| 78 | static const unsigned char *seq_decode_op1(SeqVideoContext *seq, |
| 79 | const unsigned char *src, |
| 80 | const unsigned char *src_end, |
| 81 | unsigned char *dst) |
| 82 | { |
| 83 | const unsigned char *color_table; |
| 84 | int b, i, len, bits; |
| 85 | GetBitContext gb; |
| 86 | unsigned char block[8 * 8]; |
| 87 | |
| 88 | if (src_end - src < 1) |
| 89 | return NULL; |
| 90 | len = *src++; |
| 91 | if (len & 0x80) { |
| 92 | switch (len & 3) { |
| 93 | case 1: |
| 94 | src = seq_unpack_rle_block(src, src_end, block, sizeof(block)); |
| 95 | for (b = 0; b < 8; b++) { |
| 96 | memcpy(dst, &block[b * 8], 8); |
| 97 | dst += seq->frame->linesize[0]; |
| 98 | } |
| 99 | break; |
| 100 | case 2: |
| 101 | src = seq_unpack_rle_block(src, src_end, block, sizeof(block)); |
| 102 | for (i = 0; i < 8; i++) { |
| 103 | for (b = 0; b < 8; b++) |
| 104 | dst[b * seq->frame->linesize[0]] = block[i * 8 + b]; |
| 105 | ++dst; |
| 106 | } |
| 107 | break; |
| 108 | } |
| 109 | } else { |
| 110 | if (len <= 0) |
| 111 | return NULL; |
| 112 | bits = ff_log2_tab[len - 1] + 1; |
| 113 | if (src_end - src < len + 8 * bits) |
| 114 | return NULL; |
| 115 | color_table = src; |
| 116 | src += len; |
| 117 | init_get_bits(&gb, src, bits * 8 * 8); src += bits * 8; |
| 118 | for (b = 0; b < 8; b++) { |
| 119 | for (i = 0; i < 8; i++) |
| 120 | dst[i] = color_table[get_bits(&gb, bits)]; |
| 121 | dst += seq->frame->linesize[0]; |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | return src; |
| 126 | } |
| 127 | |
| 128 | static const unsigned char *seq_decode_op2(SeqVideoContext *seq, |
| 129 | const unsigned char *src, |
no test coverage detected