+ *
+ * The "unit size" is the number of bytes used to store probe values.
+ * For example, a unit size of 1 means one byte is used (which can store
+ * 8 probe values, each of them is 1 bit). A unit size of 2 means we can
+ * store 16 probe values, 3 means we can store 24 probe values, and so on.
+ *
+ * If the data coming from the logic analyzer has a unit size of 4 for
+ * example (as the device has 32 probes), but only 2 of them are actually
+ * used in an acquisition, this function can convert the samples to only
+ * use up 1 byte per sample (unit size = 1) instead of 4 bytes per sample.
+ *
+ * The output will contain the probe values in the order specified via the
+ * probelist. For example, if in_unitsize = 4, probelist = [5, 16, 30], and
+ * out_unitsize = 1, then the output samples (each of them one byte in size)
+ * will have the following format: bit 0 = value of probe 5, bit 1 = value
+ * of probe 16, bit 2 = value of probe 30. Unused bit(s) in the output byte(s)
+ * are zero.
+ *
+ * The caller must make sure that length_in is not bigger than the memory
+ * actually allocated for the input data (data_in), as this function does
+ * not check that.
+ *
+ * @param in_unitsize The unit size (>= 1) of the input (data_in).
+ * @param out_unitsize The unit size (>= 1) the output shall have (data_out).
+ * The requested unit size must be big enough to hold as
+ * much data as is specified by the number of enabled
+ * probes in 'probelist'.
+ * @param probe_array Pointer to a list of probe numbers, numbered starting
+ * from 0. The list is terminated with -1.
+ * @param data_in Pointer to the input data buffer. Must not be NULL.
+ * @param length_in The input data length (>= 1), in number of bytes.
+ * @param data_out Variable which will point to the newly allocated buffer
+ * of output data. The caller is responsible for g_free()'ing
+ * the buffer when it's no longer needed. Must not be NULL.
+ * @param length_out Pointer to the variable which will contain the output
+ * data length (in number of bytes) when the function
+ * returns SR_OK. Must not be NULL.
+ *
+ * @return SR_OK upon success, SR_ERR_MALLOC upon memory allocation errors,
+ * or SR_ERR_ARG upon invalid arguments.
+ * If something other than SR_OK is returned, the values of
+ * out_unitsize, data_out, and length_out are undefined.
+ *
+ * @since 0.1.0 (but the API changed in 0.2.0)