int ebml_read_sint (ebml_parser_t *ebml, ebml_elem_t *elem, int64_t *num) {
uint8_t data[8];
uint64_t size = elem->len;
if ((elem->len < 1) || (elem->len > 8)) {
xprintf(ebml->xine, XINE_VERBOSITY_LOG,
"ebml: Invalid integer element size %" PRIu64 "\n", size);
return 0;
}
if (!ebml_read_elem_data(ebml, data, size))
return 0;
/* propagate negative bit */
if (data[0] & 80)
*num = -1;
else
*num = 0;
while (size > 0) {
*num = (*num << 8) | data[elem->len - size];
size--;
}
return 1;
}
int ebml_read_float (ebml_parser_t *ebml, ebml_elem_t *elem, double *num) {
uint8_t data[10];
uint64_t size = elem->len;
if ((size != 4) && (size != 8) && (size != 10)) {
xprintf(ebml->xine, XINE_VERBOSITY_LOG,
"ebml: Invalid float element size %" PRIu64 "\n", size);
return 0;
}
if (!ebml_read_elem_data(ebml, data, size))
return 0;
if (size == 10) {
xprintf(ebml->xine, XINE_VERBOSITY_LOG,
"ebml: FIXME! 10-byte floats unimplemented\n");
return 0;
}
if (size == 4) {
float f;
*((uint32_t *) &f) = _X_BE_32(data);
*num = f;
} else {
double d;
*((uint64_t *) &d) = _X_BE_64(data);
*num = d;
}
return 1;
}
int ebml_read_ascii(ebml_parser_t *ebml, ebml_elem_t *elem, char *str) {
uint64_t size = elem->len;
if (!ebml_read_elem_data(ebml, str, size))
return 0;
return 1;
}
int ebml_read_binary(ebml_parser_t *ebml, ebml_elem_t *elem, void *binary) {
return !!ebml_read_elem_data(ebml, binary, elem->len);
}
