| 50 | }; |
| 51 | |
| 52 | static int gmext_read_stream (struct gmstream *p, |
| 53 | unsigned int n, const unsigned char *data) |
| 54 | { |
| 55 | if (!n--) |
| 56 | return -1; |
| 57 | p->tempo = *data++; |
| 58 | |
| 59 | // subsequences |
| 60 | if (!n--) |
| 61 | return -1; |
| 62 | p->nsubs = *data++; |
| 63 | |
| 64 | for (int i=0; i<p->nsubs; ++i) { |
| 65 | if (n < 4) |
| 66 | return -1; |
| 67 | unsigned int s = read_uint32_le(data); |
| 68 | if (s < 4) |
| 69 | return -1; |
| 70 | p->subs[i].size = s - 4; |
| 71 | p->subs[i].data = data + 4; |
| 72 | n -= s; |
| 73 | data += s; |
| 74 | } |
| 75 | |
| 76 | // tracks |
| 77 | if (!n--) |
| 78 | return -1; |
| 79 | p->ntracks = *data++; |
| 80 | |
| 81 | for (int i=0; i<p->ntracks; ++i) { |
| 82 | if (n-- < 5) |
| 83 | return -1; |
| 84 | p->tracks[i].channel = *data++; |
| 85 | unsigned int s = read_uint32_le(data); |
| 86 | if (s < 4) |
| 87 | return -1; |
| 88 | p->tracks[i].seq.size = s - 4; |
| 89 | p->tracks[i].seq.data = data + 4; |
| 90 | n -= s; |
| 91 | data += s; |
| 92 | } |
| 93 | |
| 94 | return n ? -1 : 0; |
| 95 | } |
| 96 | |
| 97 | static inline void gmext_write_int16 (std::vector<unsigned char> &midi, |
| 98 | unsigned int n) |
no test coverage detected